WO2019105313A1

WO2019105313A1 - Dust removing device for bag-type dust collector

Info

Publication number: WO2019105313A1
Application number: PCT/CN2018/117330
Authority: WO
Inventors: 姚航; 东佃军; 姚朝胜; 刘建国; 贾凯迪
Original assignee: 山东盛华投资有限责任公司
Priority date: 2017-11-28
Filing date: 2018-11-24
Publication date: 2019-06-06
Also published as: CN114931810A; CN209828507U; CN111491709B; CN111491709A

Abstract

A dust removing device for a bag-type dust collector, comprising a mobile spraying blowpipe device used for pulse spraying of backblow gas for dust removal. A spraying blowpipe (6) with a nozzle (9) reciprocates linearly to blow filter bags (22) in different positions. One end of a gas piping (5), between a gas bag (2) and the spraying blowpipe (6), near a gas bag pulse valve (1) is not displaced, and one end near the spraying blowpipe (6) displaces along with the spraying blowpipe.

Description

Bag type dust collector cleaning device

Technical field

The invention relates to a bag type dust collector cleaning device, which belongs to the field of environmental dust control.

Background technique

A complete bag filter main body, taking the mainstream vertical external filter type dust collector as an example, from the bottom up, the ash hopper, the filter chamber and the inlet side of the filter chamber are connected to the inlet passage and possibly the valve , the clean air chamber and the air outlet passage connected to the clean air chamber and the valves that may be provided. The ash hopper is used to store the dust ash and is periodically discharged through a ash discharge valve provided on the ash hopper. The filter chamber is provided with a plurality of cylindrical filter bags made of filter material, and the filter bags are suspended from the flower plates. The flower plate is also called a perforated plate, and refers to a steel plate which is provided with a filter bag hole and which separates the filter chamber from the clean air chamber. Between the filter bag mouth and the flower plate mouth, the steel expansion ring is used to expand and seal. Such a structure forms the basic unit of the baghouse. The working process is as follows: the gas to be dusted first enters the air inlet passage, then enters the filter chamber, and then passes through the filter material from the outside of the filter bag to enter the inside of the filter bag, and then passes through the upper plate of the filter bag to enter the air filter. Room, and finally enter the air passage to leave. When the gas passes through the filter bag, the dust will be filtered and attached to the outer surface of the filter bag. There is a cleaning device in the clean air chamber. When the dust on the outer surface of the filter bag is accumulated in a certain amount, the anti-blowing airflow is injected into the filter bag through the filter bag mouth, so that the filter bag is swollen outward and the filter bag is removed. The dust accumulated on the surface. The dusted filter bag restores the low resistance to filter the state of the dust to be removed. Repeatedly, the entire process of dust removal operations is completed.

The existing ash cleaning device can be divided into two types according to the implementation time of the gas medium to be blasted into the ash filter bag from the clean gas side. One is pulse injection at the millisecond level, and the other is continuous backflush or pulsation backflush in seconds. The working mode of the pulse blowing nozzle is divided into two types, one is spraying, that is, each row of the filter bag has its own fixed blowing pipe; the other is rotating blowing, that is, the blowing pipe is rotating and spraying. blow.

The shortcomings of jetting are that there are many blowing pipes and many pulse valves. It is inconvenient to replace the filter bag, and the space is not arranged with a low-pressure and large-flow blowing pipe.

Disadvantages of rotary blowing: On the one hand, because the strokes of the nozzles at different radial positions on the rotating arm rotate at the same time, the center distance of the filter bags arranged on different radii is the same on the circumference. As a result, the nozzle cannot be aligned with the filter bag opening that needs to be cleaned. On the other hand, the four corners of the square case accommodating the cylindrical bag bundle cannot arrange the filter bag, resulting in wasted space and increased investment. Nederman has a reciprocating linear anti-blow moving device, but it uses a continuous blowback of the second stage. There is no pulse air bag and pulse valve. The cleaning ability is poor, and it is not suitable for customers who are difficult to clean.

CN104226038A (201410529223.7) discloses a pulse bag type dust remover comprising an upper case, a middle case, a ash hopper, an air inlet, an air outlet, a ash discharge valve, a gas bag, a pulse valve, and a three-axis motion positioning. The device is an integrated jet head that integrates a nozzle, a venturi and a retractable airtight press, as well as a program controller and a sensor, and a cartridge filter bag. The three-axis motion positioning device is installed in the upper box, and the integrated air jet head is mounted on one of the shafts of the three-axis motion positioning device. The former can position the latter above the filter bag and dock with it; the filter bag can be pumped The plug-in method is used for disassembly and installation; the program controller can control the positioning, air volume and time interval of the air jet head; the sensor can detect whether the filter bag needs to be cleaned in time. The technology nozzle can only spray one filter bag at a time, and the operation efficiency is low, and the device must be equipped with a three-dimensional motion positioning device, the device is complicated, the reliability is low, and the investment is large.

CN202569829U (201220198774.6) discloses a rotary positioning pulsating blowback bag type dust remover, and the rotary positioning pulsating blowback bag type dust remover is composed of a plurality of dust removal passages in parallel; the dust removal passage includes a bracket, an ash collecting bucket, a back blowing air tank, and a shell. Body, intake air box, filter bag, blowback air box, flower board, box cover, shroud, rotary positioning pulse backflushing cleaning mechanism, top cover, air outlet box, housing, bag cage and control system. Because the technology adopts pulsating anti-air blowing, it belongs to the second-level continuous anti-air blowing, has poor cleaning ability, and is not suitable for customers who are difficult to clean the working condition, and the back-blowing energy utilization rate is low.

Furthermore, when the bag filter is pulsed and cleaned, a large pressure gas is blown into the bag mouth in a very short time, so that the bag body is inflated, and the dust attached to the surface of the bag body is accelerated by the bag body and the bag body. The effect of the deformation is detached from the surface of the bag body, thereby achieving the purpose of cleaning the bag body. However, due to the short pulse injection time, there is always a negative pressure in the tank. After the pulse is sprayed, the dust that has just been blown off by the blowing is easily subjected to the negative pressure and returns to the bag body, forming the so-called two in the industry. The secondary dust, the secondary dust will cause the effect of the spray cleaning to be reduced, and the high efficiency of the bag body can not be achieved. At present, the whole box offline method is often used in the industry to solve the secondary dust problem, but this method will add an extra box, which not only increases the footprint of the dust collector, but also increases the investment cost.

In order to solve the above problems, the present invention has been specifically proposed.

Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and to provide a bag type dust collector cleaning device with strong cleaning power, convenient filter bag replacement, improved dust removal efficiency, favorable filter bag dense arrangement and greatly reduced investment.

A bag filter dust removing device comprises a moving car, a blowing pipe and a gas bag; and the air bag is characterized in that:

a moving vehicle is provided, and the blowing pipe is fixed on the moving vehicle or is a part of the vehicle body, and the blowing pipe can be moved with the moving vehicle;

A pulse valve is arranged on the air bag;

The pulse valve on the air bag is connected to the blow pipe by a gas pipe;

The end of the gas pipe close to the air bag pulse valve is not displaced, and one end near the blow pipe is displaced with the blow pipe.

The nozzle is provided with a plurality of nozzles covering at least one row of filter bag openings.

Since the spray pipe is provided with a plurality of nozzles covering at least one row of filter bags, it can be moved to any one or several rows of filter bag mouth positions that need to be blown with the moving cart. Therefore, it is preferable that only one blower tube is provided for one dust collector body. And a pulse valve.

Compared with row blowing, the present technology overcomes the disadvantage of requiring one jet pipe and one pulse valve for each row of filter bags. In the jetting process, since each of the filter bags needs to be provided with a blowing pipe and a pulse valve, the arrangement of the blowing pipe and the pulse valve is limited by the position, and the pipe diameter and the blowing amount are limited; By moving the blow pipe, you can use a thicker pipe diameter, use a larger pulse valve, blow more air volume and wind speed, and have higher injection efficiency. Compared with the solution disclosed in CN104226038A, the nozzle and the flower plate of the present case always maintain a certain height distance and do not move in the height direction. The spray pipe is provided with a plurality of nozzles covering at least one filter bag, and at least one filter bag is sprayed at a time, so that the moving blow pipe only needs to move in one direction, that is, a single movement of the nozzle compared to the above-mentioned comparison file, the single case The nozzle only performs one-dimensional motion. This greatly reduces the complexity of the motion mechanism and sensor system, improves reliability, and simultaneously sprays a line of filter bags to improve work efficiency and reduce operating energy consumption. In addition, compared with the contrast document scheme, the nozzle and the bag mouth of the bag always maintain a certain spacing, which is beneficial to the secondary flow of the pulsed airflow, which increases the amount of cleaning gas and has better clearance under the same pulse width, pressure and flow rate. Gray effect. Compared with the solution of pulsating backflushing announced by CN202569829U, the cleaning device of the present invention is provided with a gas bag and a pulse valve, and is cleaned by pulsed air using a pressure of 0.85 kg or more. In the comparison scheme, the fan is directly blown into the filter bag, which is characterized by low pressure, large air volume and long duration. The filter bag cleaning relies on the surface acceleration of the filter bag caused by the clean air flow. The greater the acceleration, the better the surface ash effect of the vibration filter material. The magnitude of the acceleration is directly related to the power of the cleaned airflow, ie the greater the power of the cleaned airflow, the greater the acceleration obtained on the surface of the filter. Obviously, assuming that the same fan is used as the origin, the pressure directly to the filter bag is low, the time is long (lasting ten seconds or more), and the pulse method using the air bag and the pulse valve is to manufacture the fan in this time. The energy is stored in the air bag and released by a pulse valve in a very short period of time (0.1 or 0.2 seconds). The power of the cleaned air stream is two orders of magnitude higher than the direct blast mode (including direct blast pulsation). The cleaning effect is naturally better than the direct blasting scheme in the comparison file. In addition, the pulsation formed by the occlusion of the mechanism can cause the vibration effect, but the energy between the pulses is completely wasted, and the period of the vibration is also second; and the pulse energy formed by the air bag and the pulse valve is all Utilize, released in millisecond time, its amplified power can cause greater acceleration, resulting in stronger vibration cleaning. Therefore, the use of air bag and pulse valve (that is, the pressure pulse mentioned in the industry) is obviously better than the direct blow of the fan to the filter bag (that is, the micro-pressure back-flushing mentioned in the industry). In fact, the current mainstream cleaning technology in the market is to use pressure pulses, which is why.

The specific structure of the bag type dust removing device of the present invention is: a bag type dust removing device, including a moving car, a blowing pipe and a gas bag; an air bag is provided outside the clean air chamber, and the air bag is fixed in the clean air chamber casing. external. The air bag inlet is connected to the fan or compressed air pipe network, and the air bag is provided with a pulse valve. The outlet of the pulse valve is connected with the air bag outlet pipe, and the air bag outlet pipe passes through the clean room of the dust collector to enter the clean air chamber, and is worn. The outer casing portion is sealed and welded to the casing, and the air bag is fixed. The air bag outlet pipe entering the clean room is connected to the gas pipe. The end of the gas pipe close to the air bag pulse valve is not displaced, and the end can be completely fixedly connected with the air bag outlet pipe, or can be connected by a movable pipe member such as a rotary joint. The other end of the gas pipe is connected to the middle portion, the end portion of the movable blowing pipe or both, and the end is displaced with the blowing pipe, and the end can be completely fixedly connected with the air inlet of the blowing pipe, or can be rotated Connect the movable pipe fittings such as joints. The movable member such as the rotary joint close to the air bag may be disposed in the clean air chamber housing or outside the clean air chamber housing. The blow pipe is fixed to the moving car or is part of the car body. The nozzle is provided with a plurality of nozzles covering at least one row of filter bag mouths, and the spacing of the nozzles can be accurately aligned with the lower filter bag ports.

At present, the pressure of the high-pressure pulse used in a large amount is above 0.3 MPa, and such a high pressure easily sprays the filter material of the filter bag, thereby affecting the service life of the filter bag. Preferably, the pulse blowing pressure is selected to be about 0.1 MPa, and the corresponding flow rate is increased, so that the strong cleaning ability can be maintained without affecting the service life of the filter bag. However, the increase of the blowing flow rate requires the diameter of the blowing pipe to become thick, and the existing line blowing scheme cannot be arranged in space. An important feature of the present technology is to provide a one-valve, one-tube, multi-nozzle linear moving cleaning device that meets the above requirements.

The pulse time of the backflush gas from the air bag is within 10-500 milliseconds, the optimized range pulse time is generally within 50-500 milliseconds, the optimized range is within 50-300 milliseconds, and the more advantageous is 150-300 milliseconds. Inside. More preferably, the pulse time of the backflush gas from the air bag is 10 milliseconds, 20 milliseconds, 30 milliseconds, 50 milliseconds, 80 milliseconds, 100 milliseconds, 120 milliseconds, 140 milliseconds, 160 milliseconds, 180 milliseconds, 200 milliseconds, 220 ms, 240 ms, 260 ms, 280 ms, 300 ms, 320 ms, 340 ms, 360 ms, 380 ms, 400 ms, 420 ms, 440 ms, 460 ms, 480 ms, 500 ms, or any of the above two The range of numerical components.

The pressure before the gas pulse injection in the gas bag is 0.05-0.7 MPa, the optimization range is 0.05-0.3 MPa, and the more advantageous range is 0.05-0.1 MPa. Due to the large gas flow required for the low-pressure pulse, the pulse valve is large, the blowing pipe is thick, the investment is large, and the spray pattern is difficult to arrange, and the problems of the technology are solved. More preferably, the pressure before the gas pulse injection in the gas bag is 0.05 MPa, 0.06 MPa, 0.07 MPa, 0.08 MPa, 0.09 MPa, 0.1 MPa, 0.15 MPa, 0.2 MPa, 0.25 MPa, 0.3 MPa, 0.34 MPa, 0.4 MPa. 0.45 MPa, 0.5 MPa, 0.55 MPa, 0.6 MPa, 0.65 MPa, 0.7 MPa, or a range of any two of the above values.

In at least one preferred embodiment of the invention, the blow tube is disposed on the clean side of the panel and is movable with the moving cart in a plane parallel to the panel. Since the blowing pipe can be at least one line of filter bag cleaning at a time, the blowing pipe only needs to move in a direction perpendicular to the blowing pipe, that is, the blowing pipe moves linearly in the plane parallel to the flower plate. Preferably, the blowing pipe is linearly reciprocated. In this way, the blowing tube can spray the filter bags at different positions in a linear reciprocating motion. Moreover, it can be selectively aligned with any one of the filter bags for blowing. Compared with the rotary pulse injection, it has the advantage that the nozzle can be accurately aligned with the bag mouth, the injection efficiency is high, and the cleaning effect is good.

In at least one preferred embodiment of the invention, the baghouse cleaning device is further provided with a track having one or more tracks; the blowing tube is moved along at least one track.

In at least one preferred embodiment of the present invention, the baghouse dust removing device is further provided with a limiting device, and the limiting device is disposed between the blowing pipe and the rail, and the blowing pipe is moved along the at least one rail via the limiting device. The limiting device is a retaining wheel or a rim. A shifting wheel that is close to the side of the rail can be disposed on the moving vehicle to restrict the moving body from slipping by the force perpendicular to the rail. The retaining wheel is composed of a roller, a shaft, a bearing, a support frame and the like. The retaining wheel is connected to the moving vehicle through the support frame, the roller surface and the track side are positioned according to the limit position, or the wheel of the moving vehicle is set. The rim restricts the moving car from moving in a direction perpendicular to the track. The presence of the limit device can make the bag filter cleaning device not derail in orbital motion.

When there are two or more tracks, the limit device can be set on only one track, and the other track is a free end.

In at least one preferred embodiment of the present invention, the moving vehicle is pulled by the transmission connecting the drag mechanism; the drag mechanism is a motor or an electric motor, the motor is a pneumatic motor or a hydraulic motor; and the transmission device is one of the following devices :

Gear and rack drive: at least one set of gears, shafts, bearings, couplings and racks, the rack is fixed on the flower plate in the direction perpendicular to the plate hole, and the rack length can cover all the filter bags. . The gear is connected to a reduction gear fixed to the moving vehicle through a bearing, a shaft, and a coupling, and is dragged by a motor or a motor. The gear meshes with the rack assembly. After the gear is dragged and rotated, the moving car reciprocates linearly.

Track and wheel drive: its structure and connection relationship are similar to those of gear and rack drive, except that the toothless meshing and frictional force make the moving car reciprocate linearly. Chain and sprocket drive: At least one set consists of at least two sets of fixed sprocket, shaft, bearing, support base and a chain. The sprocket is fixed on the support seat by components such as shaft and bearing. The support seat is fixed to the air. On the chamber shell, the chain is assembled in series on two sprocket wheels. Both ends of the chain are fixed on the moving car. The moving car is supported on the track by the wheel and the limiting device. The track is fixed to the flower in the direction perpendicular to the blowing pipe. On the board, and can reach all the spray bag blowing positions. One of the shafts of the sprocket is connected to the speed reducing device and is dragged by a motor or a motor to realize a reciprocating linear motion of the blowing tube.

Rope and pulley drive: its structure and connection relationship are the same as the chain and sprocket drive, except that the toothless meshing and frictional force make the moving car reciprocate linearly.

The mobile vehicle can also adopt other conventional mechanisms, drag mechanisms, or a combination of the above various transmission mechanisms.

In at least one preferred embodiment of the present invention, the baghouse dust removing device is configured to be moved along at least one track by a slider or a guide wheel, and passes through at least one chain or rope through a certain number of The fixed chain or the fixed pulley and the blow pipe form a closed drive cable chain traction. In each closed drive chain system, at least one fixed or fixed pulley is a drive wheel, and the shaft and the outer chamber of the clean air chamber are shifted. The mechanism and the motor are connected, and the driving wheels of the plurality of closed transmission chains are mounted on the coaxial and synchronously rotated.

For example, replacing one of the blowpipes (6) of an existing pulse train system with all of the blowpipes in a precipitator tank, or even more. A moving vehicle is provided, the blowing pipe is fixed to the vehicle body or the blowing pipe is used as a part of the vehicle body, and a rail (7) is provided. The gas pipe between the blowing pipe (6) and the pulse valve (1) on the air bag (2) is made into a head rotatable, the middle telescopic sleeve (5); or two ends fixed, the middle can be bent Deformed hose (20). Rotating the rope drive, or chain drive, or rack and pinion drive, or rail wheel drive by electric motor or air motor or hydraulic motor, so that the blow pipe reciprocates linearly on the track to form a movable bag similar to the driving in the factory. Type dust collector spray pipe cleaning device. Among them, if the rope or chain transmission is selected, the connection position and number of ropes or chains can be designed according to the actual situation to ensure that the moving vehicle is balanced during operation, stable operation, reduced operating cost and increased service life. Such a blow pipe can be moved over the filter bag at multiple positions with the moving cart, overcoming the disadvantage that each filter bag needs to be provided with a blow pipe and a pulse valve. Compared with the rotary pulse injection, it has the advantages of accurate positioning of the nozzle and the bag mouth, high injection efficiency and good cleaning effect.

At present, most of the dust collectors are vertical filter bag type dust collectors for the filter bag, and the long bags are arranged vertically, and the flower plates are horizontal. For this type of dust collector, the blowing tubes are horizontally arranged above the flower plate (the net side) and horizontally reciprocating in a plane parallel and slightly above the plane of the plate. The height of the plane of motion is such that the nozzle on the jet tube can pass without scratching the head of the filter bag and/or the bag cage, and the height should be considered to be beneficial to the blowing air stream to form a secondary drainage.

If the filter bags are arranged non-horizontally, such as the panels being vertical, the moving and blowing tubes and the corresponding mechanisms need to be arranged vertically.

In at least one preferred embodiment of the present invention, the baghouse dust removing device has a gas pipe as a hose or a sleeve. Since the gas pipe is a fixed air bag and a blow pipe that can reciprocate linearly, it must have a function of deformation or expansion and/or rotation. The casing can be in three forms: one is a pendulum type, the casing is telescopic and oscillating in a vertical plane, the rotary joint is also rotated in a vertical plane; the second is in the form of a sway, and the casing is telescopic in a plane. And the swinging, the rotary joint is also rotated in the plane; the third is the push-pull form, the sleeve does not swing, only stretches along the straight line, no need to rotate the joint. When the hose is selected, the middle portion of the hose can be bent and deformed so as to be deformed in accordance with the movement of the blowing pipe to meet the blowing requirements.

When the casing is selected, the bag type dust collector cleaning device has two ends of the gas pipe as a rotary joint. A swivel joint is a joint seal that can input a fluid medium from a stationary pipe (a gas outlet pipe connected to a pulse valve) into a rotating or reciprocating device (casing). The inlet and outlet of the swivel joint are relatively rotatable. In this case, the rotary joint connected to the air bag, the inlet (connected to the air bag) is fixed, the outlet (connected to the telescopic sleeve) can be rotated relative to each other; the rotary joint connected to the blow pipe, the inlet (connected to the telescopic sleeve) The rotation of the blow pipe is performed, and the outlet (connected to the blow pipe) is fixed relative to the blow pipe, but they all follow the blow pipe to make a horizontal linear reciprocating motion. The rotary joints at the two ends can effectively achieve pipe sealing during the blowing process. The cleaned air stream is ejected from the air bag through the first rotary joint, enters the straight section size casing, and is discharged from the other end of the rotary joint into the gas pipe.

In at least one preferred embodiment of the present invention, the sleeve is a two-stage or three-stage sleeve in which the center tube is an overlapping tube of a large and small tube. With the movement of the moving car and the blowing pipe, the distance and angle between the blowing pipe and the air bag are constantly changing, and the required length of the gas pipe is also changed. At this time, the size of the straight section is matched with the casing, and the casing is under tension and pressure. Under the action, it will move relative to the axial direction to achieve the requirement that the length of the gas pipe needs to be changed. The rotary joints at the two ends are relatively rotated in the inlet and outlet to meet the distance and angle of the spray pipe when blowing the filter bags at different positions.

When the height of the clean air chamber is relatively short (half meter), in order to ensure a sufficient range of movement of the blow pipe, the expansion and contraction of the sleeve can be set in a plane parallel to the flower plate. At this time, the gas pipe is generally 3-5 meters long. During operation, due to gravity, the middle part will naturally sag, causing different axial phenomena of the multi-segment casing, thereby increasing the frictional resistance in the relative movement and affecting the gas pipe. The service life. In order to solve this problem, a hanging device can be arranged in the middle of the gas pipe, which can effectively reduce the wear caused by the natural drooping of the middle portion. The hanging device may be spring-type, that is, a fixed rail is arranged above the gas pipe, and a slider is arranged in the track, and the slider and the gas pipe are connected by a spring device; or may be in the form of a lifting weight, that is, above the gas pipe There is a fixed track, a slider is arranged on the track, a fixed pulley is arranged on the slider, and a fixed fixed pulley is arranged at a suitable place on the cover, and the weight is connected to the gas pipe through the two fixed pulleys. When the gas pipe is a hose, the above two methods can suspend the middle of the gas pipe to prevent the hose from coming into contact with other objects to cause wear; when the gas pipe is a casing, the above two ways can be the middle of the gas pipe Suspended to reduce the friction of the relative movement of the casing.

Preferably, in at least one preferred embodiment of the present invention, at least one outer support roller or inner sleeve is disposed at a contact portion of the outer sleeve straight end of the telescopic sleeve and the inner sleeve. The straight section end is in contact with the outer sleeve and the force receiving portion is provided with at least one inner support roller; and the outer support roller and the inner support roller may be simultaneously provided. As the blowing pipe moves, the inner and outer casings connecting the blowing pipe and the air bag will move relative to each other, and friction will continue to occur between the two. By installing the support roller at the above position, the sliding friction between the inner and outer sleeves can be converted into rolling friction, the frictional resistance between the sleeves is greatly reduced, the power consumption required for the movement of the traction sleeve is reduced, and the sleeve is weakened. The frictional resistance between the two can also extend the service life of the casing.

The outer support roller is composed of a roller, a shaft, a bearing, a support and the like. The surface of the roller is axially concave and has the same radius as the outer diameter of the inner sleeve. The support is welded to the end of the force receiving portion of the straight section of the outer large tube and the inner sleeve. If it is a support, it is welded to the top; if it is a plurality of supports, it can be symmetrically distributed in this part. The support should be installed so that only the roller is in contact with the outer surface of the inner small sleeve to ensure that the large and small sleeves do not touch and have a certain gap. The structure and mounting portion of the inner and outer support rollers are similar, the difference being that the surface of the inner support roller is axially convex.

In the case of a support roller, the sleeve can still be provided with the suspension mechanism to further reduce the frictional resistance between the sleeves.

Due to the wear of the inner support roller, it needs to be replaced regularly. An inspection hole is arranged at an appropriate position on the upper part of the straight section of the outer sleeve to facilitate maintenance and inspection of the inner support roller.

In at least one preferred embodiment of the present invention, the baghouse dust removing device is provided with a windshield cover plate, which can cover at least one row of filter bag mouths; and is connected to the moving car and/or the blow pipe. Move with it. After the blowing, the windshield cover immediately covers the bag mouth of the filter bag covered by the windshield cover, so that the pressure inside the filter bag covered by the filter bag is close to the pressure on the outside of the filter bag, ensuring that the periphery of the filter bag is just blown out. The dust that is dropped will not be sucked back to the outer surface of the filter bag by a large negative pressure and fall into the ash hopper, thereby solving the secondary dust problem.

The most serious secondary dust generation is a line of filter bags that will be sprayed, followed by a row of filter bags that have just been blown out, and again a row of filter bags that have just been blown out. Therefore, the choke cover should cover at least one row of filter bags to be blown or at the same time cover a plurality of rows of filter bags that have just been blown out or that have been blown out. Therefore, the choke cover should be set to cover at least one or more rows. If skipping is used, the requirements for multiple rows of the windshield cover are reduced, but multiple lines can still play a certain role.

In at least one preferred embodiment of the present invention, the choke cover of the blow pipe opens the same port as the blow nozzle and is integrally connected to the blow pipe. The nozzle may be in the shape of a cylinder, a cone, a cube or the like, one end of which is connected to the blowing pipe and the other end of which is connected to the windshield cover. In this way, the windshield cover is fixed on the nozzle of the blowing pipe, and as the blowing pipe moves, the wind blocking of the filter bag mouth of the blowing port is realized, and the secondary dusting problem is solved.

In order to save investment and make rational use of space, a row of filter bag sides on the side of the box is generally close to the side wall of the box, and there is no large space. Therefore, when the windshield cover is arranged to cover the plurality of filter bag mouths, in order to ensure that the blow pipe can be moved to the center of the outermost filter bag mouth of the box, the outer windshield cover needs to be turned up, so that the windshield cover can be Set the stack on the board.

In at least one preferred embodiment of the present invention, the cover plate may be formed by at least one stacked plate, and the stacked plates are connected by a hinge; at least one set of guide rollers is disposed at least on the outer edge of the stacked plate, the guide roller It consists of a roller, a shaft, a bearing, a support base and the like. At a position corresponding to the guide roller, a folding slide rail is provided, and the track shape of the folding slide rail is an arc or arc-like or linear shape capable of giving a vertical upward force component of the guide roller. When the blowing pipe drives the choke cover to move to the position of the filter bag near the side of the box, the guiding roller on the stack plate disposed on the corresponding side of the choke cover moves to the folding rail, and is vertically supported by the sliding rail. With the upward component force and the upward movement of the sliding rail, the stacking plate is turned up to ensure that the blowing pipe can smoothly move to the center of the outermost filter bag mouth.

The choke cover is integrated with the blow pipe to block the air of the filter bag to prevent secondary dust. Because the cover and the nozzle are integrated, the secondary drainage is weakened, but the advantage is that the device has a simple structure. Reliable operation. The windshield cover is provided with at least one lifting roller, and the lifting roller is composed of a roller, a shaft, a bearing, a support seat and the like, and the lifting roller is installed on a vertical line or near the center of gravity of the windshield cover. Relative to the lifting roller, a choke cover lifting rail is disposed at a corresponding position thereof, and the choke cover lifting rail surface is perpendicular to the center line of the flower board hole. The rail surface of the choke cover lifting rail is convex and concave. The lifting roller moves on the convex and concave windshield cover rail, which can drive the choke cover to rise. The lifting roller and the choke cover rail are arranged in order to spray the choke cover on the premise of the blowing pipe, and on the one hand, the nozzle on the blowing pipe is not affected, and on the other hand, the forming of the blowing bag is not affected. Secondary drainage.

In at least one preferred embodiment of the present invention, the windshield cover is provided with at least one set of lifting rails, and the two symmetric lifting rails may be connected as a gate rail, and at least the blowing rail is disposed on the blowing rail. A set of lifting guide wheels, the lifting guide wheel is composed of a roller, a shaft, a bearing, a support seat and the like. It is also possible to arrange the lifting rail on the blowing pipe and the lifting guide wheel on the windshield cover.

The lifting rail and the lifting guide wheel are arranged. On one hand, the wind blocking cover and the blowing pipe can be connected: on the one hand, the lifting guide wheel can be rolled up and down during the ascending and falling process, and the lifting guide wheel rolls on the lifting rail to reduce the resistance of the wind blocking cover. Resistance; on the other hand, the lifting guide wheel and the lifting rail can define the choke cover and the blowing tube to move synchronously in the horizontal direction.

The choke cover cannot fall before the blow pipe is blown, so it needs to be hung on the blow pipe. As the blow pipe moves, the blow pipe can be dropped behind the filter bag after the blow pipe is blown. Therefore, a hook system needs to be provided. Trigger the drop system.

Therefore, at least one air push tube is disposed on the blowing pipe, and the triggering plate is arranged relative to the air pushing tube, and the triggering power is pulsed gas; the triggering push plate is provided with a hook, and the wind blocking cover plate is provided with a corresponding hanging ear. The trigger push plate can be connected with a swing rod rotating around a fixed shaft on the blow pipe, or a slider and a slider return spring or a slider reset weight connection can be provided to trigger the reset of the push plate after the trigger push process ends.

When the lifting roller moves to the highest position of the choke cover rail, the hanging lug on the choke cover is suspended from the hook of the trigger pushing plate, and then the choke cover is suspended by the hook system and then moved. When the blow pipe reaches the center of the filter bag for pulse injection, the pulse air flow also flows to the air push tube at the same time, pushing the trigger push plate outside the gas push tube, triggering the push plate and the hook on the push plate to be moved, hooking and blocking the wind cover The hanging ear on the board is disengaged, and the windshield cover plate is dropped by gravity to the top of the filter bag mouth after the blowing, and the wind blocking work is performed. The trigger push plate resets the weight through the set swing rod or the slider and the slider return spring, so as to return to the position of the air push tube nozzle and wait for the next trigger work. The trigger push plate may be provided with a slider and a slider return spring or a slider reset weight, and the slider slides on a slide provided on the blow pipe; the trigger push plate may also be connected to a swing bar surrounding a fixed shaft on the blow pipe. connection.

Since the windshield cover needs to be suspended under the blowing pipe, in order to prevent the blowing nozzle from blowing on the filter bag, a flap is required in the middle of the choke cover, and when the choke cover is suspended from the blowing pipe, The cover can be turned up to expose the nozzle. Therefore, on the windshield cover, the portion of the gas which is sprayed into the filter bag by the blow nozzle is blocked by a hinge structure, and the hinge may be provided with a spring; the hinge is used as a reference relative to the hinge The other side of the flap is provided with a pressing arm, and the pressing arm is provided with a pressing ear, and the pressing pipe is provided with a pressing rod at a position relative to the pressing ear. The choke cover is continuously raised by the lifting roller, and when it rises to a certain height, the pressing rod on the blowing pipe is in contact with the pressing ear on the choke cover. As the windshield cover continues to rise, the pressure bar will press down on the pressure ear, the pressure ear will be squeezed down, and the pressure arm below the pressure ear will also flip down, with the hinge as the axis and the pressure arm. The symmetrical flaps will be turned up accordingly. When the choke cover is suspended from the blow pipe, the flipper that is turned up may expose the nozzle on the blow pipe.

The windshield cover can also be provided with the stacking structure in front, so that the space can be rationally utilized and the investment can be reduced. The cover plate may be composed of a plurality of foldable stacking plates, and the stacking plates are connected by hinges; at least the outer edge of the stacking plates is provided with guiding rollers, and the folding rollers are provided with respect to the guiding rollers.

In at least one preferred embodiment of the present invention, the connecting means of the choke cover and the blow pipe are at least one four-bar linkage, and the four-bar linkage is connected to the blow pipe at one end and the choke cover at the other end. The windshield cover connected by the four-bar linkage mechanism is also provided with the front lifting roller and the windshield cover rail, the air push tube and the trigger pushing plate, the hook and the hanging ear, and may also be provided with a stacking plate, the guiding roller and the guiding roller Folding rails. The gas blowing tube triggered by the pulse gas is triggered on the blowing pipe, and the triggering plate is triggered, and the triggering power is pulsed gas; the triggering plate is provided with a hook, and the hook is provided on the opposite side of the wind blocking cover; the triggering plate is A slider and a slider return spring or a slider reset weight are arranged, and the slider slides on a slide provided on the blow pipe; the trigger push plate can also be connected with a swing rod that rotates around a fixed shaft on the blow pipe; A plurality of foldable stacks are formed, and the stacking plates are connected by hinges; at least the outer edge of the stacking plates is provided with guiding rollers, and the folding rollers are provided with respect to the guiding rollers.

When the choke cover moves with the moving blow pipe, the lifting roller on the choke cover can drive the cover to rise, and the four-bar linkage mechanism pulls the choke cover to the side of the moving blow pipe by the pulling force. When the choke cover is moved to the highest position, it is hung on the hook on one side of the blowing pipe by the mounting lugs thereon, and moves along with the blowing pipe. When the blowing pipe is pulse-pulsed, the airflow emitted by the air-pushing pipe pushes the triggering plate to move with the hook thereon, so that the hook and the hanging ear on the windshield cover are disengaged, and the windshield cover is blown by the blowing pipe The side drops and the mouth of the filter bag that will be covered.

In at least one preferred embodiment of the present invention, in order to achieve that the filter bag is stopped from participating in the filtering operation when the individual filter bags are damaged, the prior art provides a dedicated flap (26).

In at least one preferred embodiment of the present invention, the baghouse dust removing device has a bag flap (26) on the moving blow pipe device. As shown in Fig. 15, the top surface of the mouthpiece cover (26) is a flat surface having a shape that is identical to the shape of the outer edge of the bag mouth of the bag cage, but the size is slightly larger. Under the top surface of the bag cover, along the edge of the top shape, there is a skirt which is generally cylindrical. The top surface size is at least larger than the size of the bag head guard plate plus the thickness of the skirt plate, at least smaller than the size of the bag cage head guard plate plus the adjacent four guard plates; the height of the bag mouth cover skirt is slightly larger than The height of the head of the bag cage so that the bag cover can cover the entire head of the bag cage. The lower edge of the skirt, that is, the edge that is in contact with the flower plate (14), is coated with a certain thickness of filter material or other flexible sealing material to eliminate the gap with the surface of the flower plate to provide a sealing function. The flap (26) is made of a denser material, such as steel, for the purpose of overcoming the weight of the filter bag against the negative pressure of the filter bag when filtering the gas.

The bag cover (26) is placed on the bag cover pallet that is rigidly coupled to the blow tube when the mobile blow tube is in operation. The bag cover plate and the blowing pipe wall connected thereto form a groove structure, and the groove can make the skirt of one side of the bag cover abut against the groove wall of the bag cover plate, and the other end leans against On the wall of the blowing pipe. When the width of the groove is operated by the blowing pipe, the flap on the bag is not dropped. Preferably, the wall of the bag cover plate groove may be provided with intermittent protrusions at corresponding positions in the center of the bag mouth cover. The side of the bulge close to the flap may be curved. This is beneficial to the fact that the flap of the bag is tipped over and dropped during work, and the material of the flap cover plate is saved. Preferably, a bag cover plate of the same length can be disposed on the spray pipe according to the length direction of the moving car, and a bag cover having a number equal to the number of filter bags is placed on the plate, and the bag cover is placed ( 26) Tilt the movable car and the corresponding bag mouth on the bag cover plate (25).

When the bag cover is not in operation, it is placed to rest on the bag cover plate and moves along with the blow pipe. Therefore, the flap can cover the mouth of the filter bag within the working range of any blow pipe. When there are individual filter bags broken, the spray pipe can be moved to the appropriate position under the premise that the box continues to work, and the corresponding flap cover is tilted by the flap flipping trigger device to buckle the broken filter. The pocket of the bag. The bag opening can completely cover all the components above the flower board and the damaged filter bag mouth in the sealed space formed by the bag mouth cover (26) and the flower board (14), so that the damaged filter bag is offline and no longer participates. Filtration work, while other filter bags are unaffected and work as usual.

In at least one preferred embodiment of the present invention, the bag flap tipping trigger device is provided with a buckle cover rod (27) and a buckle cover rod passage (32), and the flap cover plate (25) is provided with a buckle The cover rod passage (32) has a guide hole (31) for introducing a buckle lever (27) at a corresponding position on the side wall of the clean air chamber. The configured buckle cover rod (27) adopts a telescopic rod method, and an end portion of the buckle cover rod (27) is provided with an elbow.

The buckle cover channel (32) is a passage defined by the swash plate and the bag cover tray (25) and the side wall of the blow pipe, and the slant plate is disposed in the groove of the bag cover plate (25) and is connected thereto. The bottom surface of the groove and the corresponding side wall of the blowing pipe; the sloping plate is rigidly connected to the side wall at an angle. The angle between the swash plate and the bottom surface of the groove of the bag mouth cover tray, and the angle between the swash plate and the side wall of the blow pipe are all consistent with the angle at which the bag mouth cover is inclined when the bag cover is parked, and the length is consistent with the bag cover plate. When the bag cover is parked on the bag cover plate, the top surface of the bag is attached to the surface of the slant plate. The slanting plate is provided with a rectangular opening at a position corresponding to the mouth of the parking bag, so that the surface thereof communicates with the buckle rod passage (32). The length of the rectangular opening satisfies the need for the front end elbow of the buckle lever (27) to be rotated and ejected, and the width is slightly larger than the diameter or width of the front end elbow of the buckle lever (27). The position of the rectangular opening corresponds to the geometric center position of the flap cover, that is, the position of the nozzle of the blow nozzle.

The configured buckle lever (27) is a special tool. In at least one preferred embodiment of the invention, the buckle lever (27) is in the form of a telescopic rod with the thickest hand end and the finest front end. The maximum length must be above the length of the depth of the clean air moving vehicle. The end portion of the buckle lever (27) is provided with an elbow, and the size of the elbow is matched with the size of the buckle rod passage and the rectangular opening thereon. The shaft has a number of pocket positions that the end of the buckle lever extends into and a mark that is aligned with the guide hole (31) when in use.

On one side wall of the clean air chamber corresponding to the moving direction of the moving blow pipe, corresponding to the position of the buckle cover rod corresponding to the parking position of the blow pipe when the filter bag needs to be buckled for each line of the filter bag, the cover rod can be introduced (27) Guide hole (31). The guide holes can be of various shapes. The guide hole is provided with a hole cover which can be opened and closed, and the hole cover can be a threaded plug, or a flexible expansion plug, or a common form such as a cover which can be opened and closed. Preferably, the guide hole is sized to steer the front end elbow of the buckle lever. The small guide hole size is as small as possible to facilitate the sealing effect of the sealing cover.

The operation method of the capping process is: when the monitoring system finds and determines the position of the filter bag that needs to be taken offline, the moving car is first moved to the specific parking space where the bag cover (26) needs to be applied, and the corresponding guiding hole on the wall of the box is manually opened. (31), the elbow end of the buckle lever (27) is inserted into the guide hole (31), and the elbow is turned upward into the buckle lever passage (32) on the flap cover plate (25). Extend the buckle lever from the head step by step until the corresponding position number on the rod of the buckle lever (27) is exposed, and then align the mark on which the guide hole (31) is aligned with the guide hole, thereby determining its The end elbow just reaches the position of the corresponding flap cover (26) of the filter bag. The buckle cover rod (27) is twisted, the elbow is rotated, and the elbow is pushed through the rectangular opening of the slanting plate of the buckle cover rod to push the corresponding flap (26) to tilt it, forming a lower edge of the filter bag. On the adjacent bag mouth, the other lower edge is still placed on the protrusion of the bag cover plate (25), and then the blow pipe moves along the other side of the bag cover (26) to make the bag mouth The cover (26) is towed to the head of the bag cage which damages the bag mouth (13), and is placed on the other side of the bag cover on the protrusion of the bag cover plate, along the curved surface on the inner side of the protrusion, gradually Disengage the bag cover from the bag and finally come off the buckle cover.

Another type of bag flap tipping triggering device is provided with a brake wire (28) on the bag type dust removing device, and the brake wire (28) enters the box body from the outside of the box body, and the brake wire ( 28) The core wire is connected to the bag cover (26) by a lever mechanism. The brake line (28) transmits the action to drive the bag cover to tip over from the moving bag cover plate and buckle over the bag mouth.

In a further preferred embodiment of the invention, unlike the first solution, the solution has no buckle lever and buckle cover channel, and correspondingly no guide holes are provided. The position of the slanting plate is replaced by the position of the slanting plate at the position of the slanting plate, and a working position of the brake wire is provided for each position of the bag cover (26) on the bag cover plate (25). The working end is a lever type mechanism which is formed by a swash plate which is rotatable along the longitudinal direction of the blowing pipe, and is hingedly connected to a seat rigidly welded to the side wall of the blowing pipe. In the natural state, the swash plate is placed under the force of the torsion spring at the hinge joint and the force of gravity to maintain the angle at which the flap is tilted when the flap is parked. The bottom of the swash plate is connected to the brake wire core. In this way, the wire of the brake wire core is driven to drive the swash plate of the lever mechanism, thereby pushing, or rotating, or rotating the bag cover (26) to complete the flipping action. The number of the working ends is the same as the number of the flaps on the cover plate, and the positions also correspond one-to-one. Correspondingly, the same number of brake lines are connected to them.

All the brake wires are combined into one wire harness, which is taken out of the clean room and sealed by the sealing cover (29). When the capping operation is performed, the special mechanism or tool at the other end of the corresponding number of brake wires is used to perform the capping operation outside the box body, and the relative movement of the wire core and the wire tube is used to transmit the action to the box body, so that the designated bag mouth cover is provided. (26) Complete the flip button action.

The present invention also provides a bag type dust remover, characterized in that the bag type dust remover comprises any of the bag type dust remover cleaning devices described above.

The invention also provides a mobile dust cleaning method for a bag type dust remover, characterized in that, using any of the above bag type dust remover cleaning devices, the following steps are included:

1) The blow pipe is fixed on the moving car or part of the car body. The moving car moves linearly and drives the blow pipe to move. It moves straight to the top of the filter bag that needs to be blown on any line, and is accurately aligned with the filter bag mouth. ;

2) A pulse valve is arranged on the air bag outside the clean air chamber, and the gas enters the air bag through the air bag inlet pipe and enters the air bag outlet pipe through the outlet of the pulse valve, and sequentially enters the gas pipe of the clean air chamber along the air bag outlet pipe, Spraying tube, nozzle, and jetting through the nozzle; the pulse time of the backflushing gas from the air bag is within 10 to 500 milliseconds, and the pressure before the gas pulse in the air bag is 0.05-0.7 MPa;

3) In step 2), the gas sprayed through the nozzle enters the filter bag through the filter bag mouth, bulges the bag body of the filter bag, and partially passes the filter material of the filter bag into the filter chamber, and the surface of the filter bag which is swollen is accelerated. Jitter, the dust on the outer surface of the filter bag is released from the outer surface of the filter bag by the shaking and the gas that passes through the filter bag into the filter chamber, and settles to the ash hopper, and is discharged through the ash hopper.

The invention also provides a mobile dust cleaning method for a bag type dust remover, which uses any of the above bag type dust remover cleaning devices, comprising the following steps:

1) The blow pipe is fixed on the moving car or part of the car body. When performing the cleaning work, the control system gives the drag mechanism a signal, the drag mechanism rotates and drives the moving car and the blow pipe to move through the transmission mechanism. By moving the limit device on the vehicle, such as the rim, the movement of the moving vehicle is limited, so that the moving vehicle moves linearly under the driving of the drag mechanism and the transmission mechanism and the limit of the limiting device. The control system and the sensor control the stopping position of the moving vehicle, such as a proximity switch or an encoder, so that the blowing pipe on the moving vehicle can stop at the center of the filter bag mouth to be blown in each row, and the nozzle on the blowing pipe will One-to-one correspondence with the filter bag mouth to be blown.

2) Use the Roots blower to compress the external air or the dust-removed air, and input it into the air bag through the air bag intake pipe. After the pressure of the compressed gas in the air bag reaches a certain pressure value, stop the transport, or keep the air bag. Open the pressure relief valve. When the blowing pipe moves to the top of the filter bag that needs to be blown, and the air bag pressure reaches the set working pressure, the pulse valve provided on the air bag is opened, and the compressed gas is subjected to the action of the pulse valve to form a pressure pulse gas, which is exhausted through the air bag. The port is discharged. The pulsed gas is discharged from the air outlet port, flows into the blowing pipe through the gas pipe, and is ejected through the nozzle on the blowing pipe. The nozzle is for the filter bag mouth to be blown, and the pulse gas is sprayed from the nozzle into the filter bag mouth to be blown to realize pulse cleaning. The pulse time of the backflushing gas from the air bag is within 10 to 500 milliseconds, and the pressure before the gas pulse in the air bag is 0.05-0.7 MPa.

3) In step 2), the pulse gas sprayed through the nozzle enters the filter bag through the filter bag mouth, and the pulse gas swells the bag body of the spray bag, and part of the pulse gas will pass through the filter bag body filter material and enter the filter chamber. The filter bag filter material which is inflated by the influence of the pulse gas is shaken due to the large acceleration, and the dust adsorbed on the outer surface of the filter bag is pushed by the vibration of the filter bag and the pulse gas passing through the filter material of the bag body, and is separated from the bag. The outer surface of the body settles into the ash hopper and is finally discharged through the ash hopper.

In at least one preferred embodiment of the present invention, the method for moving the dust of the bag filter can add a windshield cover in the above step 2), and use a windshield cover that moves synchronously with the moving vehicle. Strictly or close to the bottom of at least one filter bag that has just been sprayed, so that the pressure inside the filter bag that covers the filter bag is nearly the same as the pressure on the outside of the filter bag, and keeps it for a necessary period of time, then leaves the spray position. , as the mobile car moves to the next blowing position, and repeats.

The choke cover can be used to cover the blown filter bag mouth by connecting the choke cover integrally with the blow pipe. The choke cover is integrally connected with the nozzle of the blow pipe, and the blow pipe is moved to the filter bag mouth to be sprayed, and the corresponding choke cover is placed over the filter bag mouth. After the blow pipe is blown, the choke cover is still covered. At least one row of the filter bag mouth after spraying, the pressure inside the filter bag of the corresponding row is gradually balanced with the pressure outside the filter bag, and the filter bag is taken offline, the cleaning operation is stopped, and the secondary dust generation phenomenon is effectively prevented. .

Alternatively, the windshield cover is connected to the spray pipe through the lift guide wheel and the lift rail. When the blowing pipe moves, the choke cover moves horizontally along with the blowing pipe, and the lifting roller moves on the uneven windshield cover rail to drive the choke cover upward. During the process of rising the choke cover plate, the pressing rod on the blowing pipe presses the pressing ear on the wind resisting cover plate, and the pressing ear welded on the pressing arm pushes down the pressing arm to turn down together, and the pressing arm is integrated The plate is turned over so that the choke cover is raised while the middle flap is turned open to expose the nozzle on the blow pipe. The choke cover is raised to the highest position, and the lugs on it are hung from the hooks of the blow pipe. The choke cover is then suspended from the blow tube and moved over the mouth of the filter bag to be blown as the blow tube moves. The pulse gas flows to the blowing pipe, and the filter bag is sprayed through the nozzle. At the same time, part of the pulse gas is ejected by the gas push tube, and the trigger push plate is moved to move the hook on the trigger push plate, and the hook is separated from the mounting ear, causing the resistance. The wind cover is detached on the blow pipe. The choke cover is affected by gravity, and the middle flap is reclosed by gravity and the spring force in the hinge. The closed choke cover is placed on the filter bag mouth just after the injection, so that the corresponding filter bag is inside. The pressure and the pressure on the outside of the filter bag are gradually balanced, and the filter bag is off-line, and the cleaning operation is stopped, thereby effectively preventing the occurrence of secondary dusting.

Alternatively, the choke cover is connected to the blow pipe through a four-bar linkage. While the blowing pipe is moving, the four-bar linkage mechanism pulls the choke cover to move by the pulling force. While the choke cover moves horizontally with the blow pipe, the lift roller moves on the choke cover rail, and the choke cover is lifted upward. The choke cover moves to the side of the blow pipe as the blow pipe moves. When the choke cover moves to the highest position, the lug on the choke cover is hung on the hook of the blow pipe, and then the choke cover The plate is suspended from the discharge pipe for movement. As the discharge pipe moves to the upper side of the filter bag mouth to be blown, the pulse gas flows to the blow pipe, and the filter bag is sprayed through the nozzle, and part of the pulse gas is ejected by the gas push tube, pushing the trigger plate to move, so that The hook of the trigger plate is moved, and the hook is separated from the mounting ear, so that the windshield cover is detached on the side of the blowing pipe. The windshield cover plate after falling off is just placed on the mouth of the filter bag which has just been blown, so that the pressure inside the filter bag of the corresponding row is gradually balanced with the pressure on the outside of the filter bag, and the filter bag is off-line, and the cleaning operation is stopped, effectively Prevent the occurrence of secondary dusting.

After the above-mentioned several forms of the windshield cover cover at least one row of the filter bag mouth which has just been blown out, the position of the filter bag is removed as the blow pipe moves to perform the cover work of the other filter bag mouth. The period of time is at least 2 s, and more preferably, the period of time is 5 s, 6 s, 7 s, 8 s, 9 s, 10 s, 15 s, 20 s, 30 s, 40 s, 50 s, 60 s, 70 s, 80 s, 90 s, 100 s, 150s, 200s, 300s, 600s, or a range of any two of the above values.

It should be noted that the present invention has been described in detail only with respect to the improvements of the present invention, and the same portions of the present invention as those of the prior art will not be discussed in detail. The prior art can be employed in parts not detailed in the present invention. For example, the rotary joint, the pulse valve, the folding rail, the control system, and the sensor mentioned in the present invention can be used in the prior art. When a certain device in the prior art has multiple structural forms, those skilled in the art can select according to the knowledge and actual needs in the art without affecting the realization of the object of the present invention.

The bag filter can use the ash cleaning device of the invention to bring the following advantages: in the cleaning effect, the ash cleaning ability is higher than the prior art, and the customer can adapt to the more demanding ash cleaning condition; In terms of life, it can extend the life of the filter bag than other existing pulse back-blowing technologies; in terms of space occupation, it is only two-thirds of the existing technology; especially in terms of saving investment, since the whole box is not used offline The filter bag section can be small, flat or pleated bag type; the effective use of the corners of the box increases the dust removal area of the unit box by 70%, and the same dust removal efficiency can reduce equipment investment by more than 20%.

DRAWINGS

Figure 1 is a schematic diagram of a pulse moving vehicle blowing device.

Figure 2 shows the gas pipe as a hose.

Figure 3 is a schematic view of the A direction of Figure 1.

Figure 4 is a front view of the moving car, the blowing pipe, and the choke cover.

Figure 5 is a side view of the lifting roller and the windshield cover rail.

Figure 6 is a top view of the windshield cover and the windshield cover rail.

Figure 7 is a cross-sectional view taken along line A-A of Figure 4.

Figure 8 is a schematic left side view of the stacking plate and the folding rail.

Figure 9 is a schematic plan view of the stacking plate and the folding rail.

Figure 10 is a schematic view of the integral structure of the blow pipe and the windshield cover.

Figure 11 is a cross-sectional view taken along line A-A of Figure 10.

Figure 12 is a partial cross-sectional view of the flap when it is opened.

Figure 13 is a front view of the four-link connecting choke cover.

Fig. 14 is a cross-sectional view taken along the line A-A of Fig. 13.

Figure 15 is a schematic view of the inner and outer support rolls of the tube.

Figure 16 is a schematic diagram of the combination of the bag mouth cover plate, the bag mouth cover, the buckle cover rod, the guide hole and the buckle cover rod channel.

Figure 17 is a schematic diagram of the combination of the brake wire, the bag cover plate, the bag cover, the brake wire seal and the sealing cover.

Among them: 1-pulse valve, 2-air bag, 3- clean air chamber top plate, 5-air pipe, 6-blow pipe, 7-track, 8-wheel, 9-nozzle, 10-synchronous shaft, 11-set Pulley or fixed cone, 12-active pulley or active cone, 13-filter pocket, 14-flower board, 15- clean chamber side panel, 16-reducer, 17-motor, 18-wire rope or chain, 19 -Flange, 20-air hose, 21-mobile wheel, 22-filter bag, 23-swing arm, 24-clip stem channel partition, 25-pocket cover, 26-pocket, 27- buckle lever, 28-brake line, 29-seal cover, 30-brake line clamp, 31-guide hole, 32-sleeve lever channel, 33-lever mechanism, 34-air bag inlet pipe, 35-resistance Wind cover, 36-lift rail, 37-lift guide, 38-hanger, 39-hook, 40-hook bracket, 41-pump, 42-press, 43-press, 44-turn, 45-lifting roller, 46-wind deflector rail, 47-support bracket, 48-stack, 49-guide roller, 50-folding rail, 51-outer casing, 52-lower rotary joint, 53-internal support Roller, 54-outer support roll, 55-inner sleeve, 56-upper swivel, 57-four-bar linkage, 58-trigger push plate, 59-hinge, 60-press arm, 61-hinge chain.

Detailed ways

The following examples are further illustrative of the invention, but the invention is not limited thereto.

Example 1

As shown in Fig. 1, the clean air chamber side plate 15, the flower plate 14, and the clean air chamber top plate 3 together constitute a clean air chamber of the bag filter. Outside the top surface of the clean air chamber, and fixed on the clean air chamber top plate 3 and its structural beam, an air bag 2 is provided, which is connected to the Roots blower through the air bag intake pipe 34. The air bag 2 is provided with a pulse valve 1, and the pipe connected to the outlet of the pulse valve 1 passes through the top plate 3 to enter the clean air chamber to become a horizontal direction, and the rotary joint 56 is connected to the horizontal portion, and then the gas pipe 5 is connected. The gas pipe 5 is a telescopic pipe which is assembled by a large and small two-stage pipe. The lower sleeve of the gas pipe is further connected with a rotary joint 52, which is connected with the end of the blow pipe 6. The bottom of the blow pipe 6 is provided with a nozzle having the same number and the same spacing as the one of the filter bags covered by the blow pipe, and the nozzle center and the cover are covered. The centers of the filter bags correspond one-to-one. On both sides of the clean air chamber, two rails 7 are arranged in parallel perpendicular to the longitudinal direction of the blowing pipe, and the blowing pipe 6 is disposed on the moving vehicle, and the wheel 21 is provided. Further, on both sides of the track on the intake side of the lower portion of the blowing pipe 6, a retaining wheel or a stopper 8 (shown in Fig. 3) is mounted. Thus, the wheel 21 does not need to be provided with a rim. The other track is a free end. If the weight of the vehicle cannot overcome the reaction force of the blow, the counterweight can be loaded, or a side flange can be provided on the track, and a retaining wheel or a stop for preventing the blow-up trolley from moving up and down can be disposed under it.

In order to pull the blow tube car horizontally and reciprocally to the top of each row of elliptical filter bag mouth 23, the two ends of the body are placed close to the track and the blow pipe end lower rotary joint 52, and the upper three chains 18 are fixed. The chains are each extended in the track direction to the clean air chamber side wall 15 (the surface to be thrown away in Fig. 1), and are vertically extended by the passive cone 11 fixed thereto. After the chain is turned by the passive cone 11, the active cone 12 thereon passes through the other two passive cones 11 (the four cones of one chain are arranged in a rectangular shape when viewed on the side wall 15 of the clean room) Finally, the two ends of the other long side wall of the blowing carriage (the opposite side of the side wall of the above-mentioned fixed chain 18) are fixed to form two closed and spatially parallel transmission chains (as shown in Fig. 3). The connecting member of the chain 18 with the trolley and the rotary joint should have a retracting mechanism for expanding the chain, and at the same time has a function of freely rotating the chain and the fixed surface in the plane of the track direction. As shown in Fig. 1, the three-proof cone 12 is disposed on the synchronizing shaft 10 to ensure synchronous rotation. The active cone synchronous shaft 10 passes through the sealed bearing, passes through the clean air chamber side plate 15, and is connected to a speed reducer 16 and an electric motor 17 provided outside the dust collector casing.

As shown in FIG. 16, one of the long side walls of the blowing trolley (which may be separately disposed on the two long side walls if necessary) is provided with a bag cover plate 25, which simultaneously functions as a windshield baffle. That is, when the spray bag is cleaned and the filter bag is cleaned, the bag cover plate covers the upper filter bag that has been cleaned, so that the dust that is cleared is not immediately adsorbed on the filter bag that completes the cleaning. This in turn helps the dust fall into the ash bucket. A buckle cover channel partition plate 24 is disposed above the bag cover plate 25, and the partition plate 24 and the long side wall of the spray car form a buckle cover channel 32. At the same time, the buckle lever channel partition 24 has the function of supporting the bag cover 26 to move with the spray carriage in a design posture. On the buckle cover channel partition, corresponding to the position of the center of gravity of the bag cover, an opening is provided or a passage is reserved by a plurality of cover rod passage partitions 24. The bag cover plate 25 is provided with a small protrusion at a position corresponding to the bag cover, and the side of the bag cover of the protruding structure is a curved upper surface.

When the blowing trolley is in operation, due to the arrangement of the upper rotary joint 56, the lower rotary joint 57 and the telescopic sleeve 5 at both ends of the gas pipe, the motor 16 is driven by the speed reducer 16 and the active cone 12 and the chain 18 The blowpipe car reciprocates linearly on the track 7, forming a movable spray car similar to the one in the factory. Such a blow pipe can blow the filter bags in multiple positions that the cart can go to. The position of its movement is set by the corresponding sensor and PLC control system as needed. The pulse time can be selected within 200 milliseconds. The pressure before the gas pulse injection in the gas bag is 0.085 MPa.

After the monitoring system finds and determines the position of the filter bag that needs to be taken offline, as shown in FIG. 16, the blower trolley is first moved to the specific parking space for which the bag cover 26 is applied, and the corresponding guiding hole 31 on the wall 15 is manually opened. The elbow end of the buckle lever 27 is inserted into the guide hole 31, and the elbow is turned upward into the bag cover plate 25, the buckle cover channel partition 24 and the buckle cover channel 32 formed by the side wall of the trolley. According to the position number on the rod of the buckle lever 27, it is determined that the end elbow just reaches the position of the corresponding flap cover 26 of the filter bag. The buckle cover rod 27 is twisted, and the flap cover 26 is pushed by the elbow to be tilted, so that one lower edge thereof is placed on the bag mouth adjacent to the damaged filter bag, and the other lower edge is still placed on the bag cover plate 25 And then the blow tube trolley moves along the opposite side of the pocket cover 26, because the small-section projection on the pocket cover plate 25 and the side of the flap cover are the upper and lower curved surfaces. The bag cover 26 is dragged to the damaged filter bag mouth and finally the buckle cover is removed.

Example 2

As shown in FIG. 2, unlike the first embodiment, after the pipe connected to the outlet of the pulse valve 1 passes through the top plate 3 and enters the clean air chamber, it is connected to the flange 19 at one end of the flexible gas supply hose 20. The other flange 19 of the gas supply hose 20 is connected to the end of the blowing pipe 6, and the pulse gas is introduced into the blowing pipe 6 and sprayed into the elliptical filter bag opening 23 through the nozzle 9 to remove the filter bag 22. Dust on the outer surface.

Another difference from the first embodiment is that, as shown in FIG. 17, a brake wire working end is provided above the bag cover plate 25, and the working end drives a lever for the wire wire that relies on the brake wire core. The mechanism 33 maintains a fixed posture as shown in the figure by means of a spring force. When the operation end of the brake wire 28 is operated, the relative movement of the wire core and the wire tube is used to transmit the action to the casing, so that the designated lever mechanism 33 overcomes the spring force to complete the flipping action, and finally the corresponding bag mouth is obtained. The cover 26 turns over the cover plate 25. All the brake wires 28 are combined into a wire harness, which is taken out of the outside of the clean room box, and the brake wire harness is led out of the dust collector box through the brake wire seal 30 and the sealing cover 29.

After the monitoring system finds and determines the location of the filter bag that needs to be taken offline, the mobile blower trolley is first moved to the specific parking space for which the bag cover 26 is applied, and the special mechanism or tool at the outer end of the brake cable 28 is used outside the box. Carrying the capping operation, causing the corresponding flap cover 26 to tip over, forming a lower edge thereof on the bag mouth adjacent to the damaged filter bag, and the other lower edge still on the bag flap plate 25, and then blowing the tube trolley Moving in the opposite direction of the bag cover 26, the bag cover 26 is dragged to the damaged bag mouth and eventually the buckle is removed.

Example 3

On the basis of Fig. 1, a blower baffle is also arranged on the blow pipe.

4 is a schematic side view of the windshield cover 35 connected to the blow pipe 6, and the other side connection relationship is consistent with the side connection relationship.

As shown in FIG. 4, the windshield cover 35 is provided with a lifting rail 36. The blowing pipe 6 is provided with a cover lifting guide 37, and the lifting rail 36 moves up and down outside the cover lifting guide 37, and the lifting rail 36 and the cover A connecting device composed of the plate lifting guide 37 connects the choke cover 35 to the blowing pipe 6. The choke cover 35 is provided with lift rollers 45 on both sides thereof, and the lift rollers 45 are moved on the choke cover rail 46 (see FIG. 5), and the contact surface of the lift roller 45 and the choke cover rail 46 has a wave shape. When the blowing pipe 6 moves in the plane of the tile, the choke cover 35 moves laterally with the moving blowing pipe 6 under the limit of the lifting rail 36 and the lifting guide 37. Due to the wave-shaped contact surface of the choke cover rail 46, the choke cover 35 rigidly connected to the lift roller 45 moves up and down with respect to the blow pipe 6 under the action of the wave-shaped contact surface.

The windshield cover 35 is provided with a mounting lug 38. The blowing pipe 6 is provided with a hook 39, a hook bracket 40, and a hook air pushing tube 41. The hook 39 is provided with a trigger pushing plate 58 matched with the air pushing tube 41. This part realizes the function of hanging and falling of the cover. A nozzle hole door (shown in FIGS. 6 and 12) is disposed in the middle of the cover plate, and the two flaps 44 are connected to the windshield cover 35 through a hinge 61. The hinge is further provided with a torsion spring, so that the flap is kept closed in a natural state and a negative pressure state of the dust collector. The moving blowing pipe 6 is provided with a pressing rod 42. The pressing plate 42 is provided with a pressing ear 43 at a position corresponding to the pressing rod 42. The pressing ear 43 is connected to the pressing arm 60 which is integrated with the flap 44 below, and the pressing rod 42 is pressed. The ears 43 collectively form a drive trigger mechanism for the nozzle aperture door (as shown in FIG. 12), and the flip-open motion of the flap 44 is achieved by the compression rod 42 and the torsion springs on the hinges 43 and the flap 44 hinges.

The choke cover consists of three cover plates covering three rows of filter bags (cleaned rows and pre-cleaned rows before and after they have been cleared). A middle cover plate is connected to the lifting rail 36, and a nozzle hole door is provided. The cover plates on both sides are hinged to the intermediate cover plate through the hinge 59 to form a stacking plate 48 which can be folded. A guide roller 49 (shown in Figs. 8 and 9) is provided on the outer side of the front end of the stacking plate 48. In the clean air chamber wall parallel to the blowing pipe 6, a folding rail 50 is provided corresponding to the position of the guide roller 49.

When the blowing pipe 6 moves along the plane of the tile, the windshield cover 35 cooperates with the wave-shaped contact faces of the lifting roller 45 and the windshield cover rail 46 rigidly connected thereto, in the door-type cover lifting rail 36 and the cover Under the limit of the plate lifting guide 37, the choke cover 35 rises relative to the blowing pipe 6 as the blowing pipe 6 moves. During the ascending process of the choke cover 35, the pressing lug 43 is pushed onto the pressing rod 42, and is pressed by the pressing rod, and the pressing ear moves downward, and the flap 44 connected to the pressing lug 43 through the pressing arm 60 is turned. The nozzle opening is opened and the nozzle opening is opened, so that the nozzle 9 on the blowing pipe 6 can be exposed. When the lift roller 45 is moved to the highest position of the choke cover rail 46, the choke cover 35 is raised to the highest level, at which time the lug 38 on the cover is hung on the hook 39 of the blow pipe 6. When the windshield cover 35 is connected to the hook 39 by the lug 38 and is suspended from the blowing pipe 6, the lifting roller 45 is separated from the rail 46 and suspended on the blowing pipe 6 to move. When the blowing pipe 6 moves above the filter bag opening 13, the movement is stopped, and the pulse cleaning is controlled by the pulse valve 1, and the high-pressure gas is discharged through the blowing pipe 6, and is ejected at the nozzle 9, thereby completing the pulse cleaning operation. While the blowing is being performed, the high-pressure airflow is also ejected by the air push tube 41, pushing the trigger pushing plate 58 rigidly connected to the hook 39, and the hook 39 is subjected to the thrust rearward movement under the action of the high-pressure airflow, so that the lug 38 is disengaged. The hook 39, at which time the cover is dropped by gravity to the support frame 47. At the same time of falling, the pressing rod 42 and the pressing lug 43 are disengaged, and the flap 44 is again closed under the influence of the torsion spring and its own gravity. When the cover plate is dropped on the support frame 47, the three rows of filter bag openings 13 are just covered, thereby realizing the cover function of the cover plate. After the cover plate 35 covers the filter bag opening 13 for a while, as the blowing pipe 6 moves away from the filter bag opening 13, the cleaning operation of the next row of bag openings is continued.

When the blowing pipe 6 and the windshield cover 35 are moved to one end of the casing, the stacking plate 48 falls on the folding rail 50, and as the blowing pipe 6 moves, the stacking plate 48 is folded along the folding rail 50, waiting for When the blowing pipe 6 is moved over the outermost row of filter bag openings 13, the stack 48 just falls on the side wall of the casing. Move the blowing pipe 6 to stop, wait for the next movement to reverse the movement, repeat the above process, and repeat the process to achieve the cleaning process.

The working method of the above cleaning system includes the following steps:

In the first step, when the precipitator continues to work for a period of time, the surface area of the filter bag is thickened by the thick powder layer, so that the system pressure is raised to the deashing threshold. The precipitator control system receives the threshold pressure signal of the system pressure relay to open the duty cycle of the cleaning system. First, the Roots blower works, and the air bag 2 is inflated and pressurized by the air bag intake pipe 34. When the set working pressure is 0.85 kg, the air bag 2 pressure relief valve is opened, and the air bag 2 is kept under pressure to wait for the pulse valve 1 to work. At the same time, the motor 17 is started, and the blower tube 6 fixed on the moving vehicle is driven by the speed reducer 16, the synchronous shaft 10, the active cone 12 and the chain 18, and the moving vehicle moves linearly and drives the blowing tube 6 to move through the synchronous shaft 10 The upper encoder controls the distance traveled by the moving vehicle until it is accurately matched with the lower filter bag opening 13 and then stops.

During the movement of the moving car to drive the blowing pipe 6, the choke cover 35 cooperates with the wave-shaped contact surface of the lifting roller 45 and the choke cover rail 46 rigidly connected thereto, in the door-type cover lifting rail 36 and When the cover lift guide 37 is in the limit position, the choke cover 35 rises relative to the blow pipe 6 as the blow pipe 6 moves. During the ascending process of the choke cover 35, the pressing lug 43 is pushed onto the pressing rod 42, and is pressed by the pressing rod, and the pressing ear moves downward, and the flap 44 connected to the pressing lug 43 through the pressing arm 60 is turned. The nozzle opening is opened and the nozzle opening is opened, so that the nozzle 9 on the blowing pipe 6 can be exposed.

Step 2: When the mobile vehicle reaches the predetermined position, that is, the encoder signal reaches the set value, and the air bag working pressure reaches the set pressure of 0.85 kg, that is, when the air bag pressure relay sends a signal, the dust collector control system issues a command, the pulse valve 1 work. The pressure gas in the air bag 2 enters the air outlet pipe of the air bag 2 through the outlet of the pulse valve 1, and sequentially enters the air pipe 5, the blowing pipe 6, the nozzle 9 of the clean air chamber along the air bag 2 air outlet pipe, and is sprayed through the nozzle 9. Out. The pulse width of the backflush gas from the air bag 2 is 200 milliseconds.

While the nozzle 9 is being blown, the high-pressure airflow is ejected through the air push tube 41, pushing the trigger pusher plate 58 rigidly connected to the hook 39, and the hook 39 is moved backward by the high-pressure airflow, so that the lug 38 is disengaged from the hook. 39. At this time, the cover plate is dropped downward on the support frame 47 by gravity. At the same time of falling, the pressing rod 42 and the pressing lug 43 are disengaged, and the flap 44 is again closed under the influence of the torsion spring and its own gravity. When the cover plate is dropped on the support frame 47, the three rows of filter bag openings 13 are just covered, thereby realizing the cover function of the cover plate. After completing the cleaning of the filter bag for 15 seconds, the choke cover 35 moves forward along with the blow pipe 6 and simultaneously rises away from the filter bag opening 13. During the 15 seconds, the moving vehicle remains stationary, and correspondingly, the obstruction cover that has been dropped is also maintained in the choke working position. In this way, the three rows of filter bags under the cover plate are in an offline state, and do not participate in the filtering work, thereby avoiding the secondary dust that may be caused. At the crest of the choke cover rail 46, it is re-suspended on the hook 39 to prepare for the wind-blocking operation at the next injection.

Step 3, the high-pressure gas sprayed through the nozzle 9 enters the filter bag through the filter bag mouth, bulges the bag body of the filter bag, and partially passes the filter material of the filter bag into the dust chamber, and the surface of the filter bag which is swollen is generated to have a larger surface. Accelerated jitter, the dust on the outer surface of the filter bag is shaken and pushed by the filter bag into the dust chamber, and is separated from the outer surface of the filter bag and settled to the ash hopper, discharged through the ash hopper, so that the whole box is completely cleared. The ash ends.

Example 4

This embodiment is another form of the air baffle. The main structure is the same as that of the third embodiment. The air baffle is different from the third embodiment in the embodiment: 1. The hook is provided only on one side of the blow pipe. Corresponding blow port. 2. When the cover is raised, it will hang on the side of the blow pipe. 3. The cover has no flaps or flaps. 4. The windshield cover rail is not a wave track, but a single-sided sawtooth track.

As shown in FIG. 13 , a hook 39 and an air push tube 41 are disposed on one side of the blowing pipe 6 , and the windshield cover 35 is provided with a corresponding mounting lug 38 , and the mounting lug 38 has two hook slots through the above device. The suspension function of the choke cover 35 is achieved. The blowing pipe 6 and the choke cover 35 are connected by a link mechanism 57. A lifting roller 45 is disposed on both sides of the windshield cover plate 35, and the lifting roller 45 moves on the windshield cover rail 46 below it to drive the windshield cover plate 35 to move upward.

When the blowing pipe 6 moves, the link mechanism 57 drives the choke cover 35 to move in the same direction. The lifting rollers 45 on both sides of the choke cover 35 move on the choke cover rail 46 to drive the choke cover 35 upward. When the lift roller 45 is moved to the top of the choke cover rail 46, the lug 38 on the choke cover 35 is suspended from the lower hook groove of the hook 39. The blowing pipe 6 continues to move, and the lifting roller 45 leaves the top end of the choke cover rail 46. At this time, the choke cover 35 is hung on the hook 39, on the side of the blowing pipe 6, and moves along with the blowing pipe 6. When the moving blowing pipe 6 is moved to the center position of the filter bag opening 13, pulse cleaning is performed, and the high-pressure airflow passes through the air push tube 41 to blow the hook 39 open. At this time, the lug 38 is separated from the hook 39, and the choke cover 35 is dropped by gravity, and falls on the side of the blow bag 6 on the side of the blow bag 6 to perform the wind blocking operation. After a period of time has elapsed, the choke cover 35 moves away from the filter bag opening 13 along with the blow pipe 6, and is re-suspended on the hook 39 for the next choke operation.

The last section of the choke cover rail 46 has a higher sawtooth height than the other serrations. When the blowpipe 6 completes the last row of bag cleaning operations, the roller on the choke cover 35 moves to the choke cover rail 46. The last paragraph is on the sawtooth. At this time, the lug 38 on the choke cover 35 is suspended from the upper hook groove of the hook 39. The choke cover 35 is suspended from the side of the blowing pipe 6 and moves back to the initial position, waiting for the next round of dust-proof and wind-proof work.

Example 4

As shown in Fig. 15, one end of the outer sleeve 51 is welded to the top end of the lower rotary joint 52, and the bottom interface of the lower rotary joint 52 is welded to the intake port of the moving blow tube. The outer diameter of the inner sleeve 55 is slightly smaller than the inner diameter of the outer sleeve 51, one end of the inner sleeve 55 is welded to the bottom interface of the upper rotary joint 56, and the top end of the upper rotary joint 56 is welded to the air outlet of the air bag. The other end of the outer sleeve 51 is sleeved outside the other end of the inner sleeve 55. The upper portion of the end of the outer sleeve 51 is mounted with an outer support roller 54 at a portion rubbed against the top of the outer wall of the inner sleeve 55. The bottom of the outer support roller 54 is lower than the inner wall of the outer sleeve 51, and the axial section of the outer support roller 54 is concavely symmetrical toward the axis. An arc line that coincides with the outer wall of the inner sleeve 55. The lower part of the end of the inner sleeve 55 is mounted with an inner support roller 53 at a portion rubbed against the bottom of the inner wall of the outer sleeve 51. The bottom of the inner support roller 53 is lower than the outer wall height of the inner sleeve 55, and the axial section of the inner support roller 53 protrudes away from the axis. A symmetrical circular arc line that coincides with the inner wall of the outer sleeve 51. Thus, the upper portion of the outer sleeve 51 is in contact with the outer outer wall of the inner sleeve 55 through the outer support roller 54, and the lower portion of the inner sleeve 55 is in contact with the inner wall of the lower portion of the outer sleeve 51 through the inner support roller 53. When the trolley is running, the air bag position is unchanged, and the trolley maintains a posture perpendicular to the track and moves along the track under the traction force and the rim limit. At this time, the lower rotary joint 52 and the upper rotary joint 56 rotate, and the outer sleeve 51 and the inner sleeve 55 are telescopically displaced, and the device changes the sliding friction between the outer sleeve 51 and the inner sleeve 55 into rolling friction, which is greatly reduced. The friction between the outer sleeve 51 and the inner sleeve 55 is obtained.

Claims

A bag filter dust removing device comprises a moving car, a blowing pipe and a gas bag; and the air bag is characterized in that:

a moving vehicle is provided, and the blowing pipe is fixed on the moving vehicle or is a part of the vehicle body, and the blowing pipe is movable;

A pulse valve is arranged on the air bag;

The pulse valve on the air bag is connected to the blow pipe by a gas pipe, and the end of the gas pipe close to the gas pulse valve is not displaced, and one end of the gas pipe is displaced with the spray pipe;

The nozzle is provided with a plurality of nozzles covering at least one row of filter bag openings.
A baghouse dust removing device according to claim 1, wherein said blowing pipe moves linearly with the moving vehicle;

The mobile vehicle is towed by at least one transmission mechanism and a drag mechanism; the drag mechanism is a motor or an electric motor, and the motor is a pneumatic motor or a hydraulic motor; the transmission device is one of the following devices: gear and rack drive, rail With wheel drive, rope and pulley transmission, chain and sprocket drive;

When the transmission mechanism is a vehicle rail and a wheel transmission, a rope and a pulley transmission, or a chain and a sprocket transmission, at least one moving vehicle track is disposed; the moving vehicle is provided with or without a limiting device, and the limiting device is a blocking wheel or rim.
A baghouse dust removing device according to claim 2, wherein the blowing pipe is horizontally arranged above the flower plate and horizontally reciprocates.
A baghouse dust removing device according to claim 2, wherein the gas pipe is a hose or a sleeve.
A baghouse dust removing device according to claim 4, wherein both ends of the gas pipe are rotary joints.
The baghouse dust removing device according to claim 4, wherein the casing is a two-stage or three-stage casing in which a large and small pipe overlaps a phase sleeve; and a hanging mechanism is arranged on the gas pipe. The hanging mechanism is in the form of a spring or a lifting weight.
The baghouse dust removing device according to claim 6, wherein at least one outer supporting roller is disposed at a contact portion of the straight end portion of the outer sleeve of the sleeve and the inner sleeve, and/or

Providing at least one inner support roller at a portion where the straight end of the inner sleeve contacts the outer sleeve;

The gas pipe is provided with a hanging mechanism, and the hanging mechanism is in the form of a spring or a lifting weight.
A baghouse dust removing device according to claim 7, wherein a manhole is provided in an upper portion of the straight section of the outer casing.
The baghouse dust removing device according to any one of claims 1-8, wherein the bag type dust removing device is provided with a wind blocking cover plate, and at least one row of filter bag mouths can be covered; The choke cover is attached to the moving cart and/or the blow tube and moves with it.
The baghouse dust removing device according to claim 9, wherein the choke cover plate and the choke cover of the blowing pipe are opened at the same port as the nozzle of the blowing pipe, and are connected to the nozzle of the blowing pipe. The cover plate is composed of at least one foldable stacking plate, and the stacking plates are connected by a hinge; at least the outer edge of the stacking plate is provided with a guiding roller, and the guiding roller is provided with a folding sliding rail.
The baghouse dust removing device according to claim 9, wherein the windshield cover is provided with a lifting roller of a windshield cover, and the lifting roller is provided with a windshield lifting rail. The choke cover lifting rail is convex and concave.
The baghouse dust removing device according to claim 11, wherein the choke cover is provided with a lifting rail, the blowing pipe is provided with a lifting guide wheel; or the wind blocking cover is provided with a bracket. The lifting guide wheel is provided with a lifting rail on the blowing pipe.
The baghouse dust removing device according to claim 12, wherein: the gas blowing tube triggered by the pulse gas is triggered on the blowing pipe, the triggering plate is triggered, the triggering power is pulsed gas; and the triggering plate is provided with a hook. a hook is arranged on the opposite hook of the windshield cover; a triggering plate and a slider return spring or a slider reset weight can be arranged on the trigger push plate, and the slider slides on the slide provided on the blow pipe; the trigger push plate is triggered It is connected to a swing rod that rotates around a fixed shaft on the blow pipe.
The baghouse dust removing device according to claim 13, wherein a portion of the gas barrier cover that blocks the gas injection port of the blowing pipe from being sprayed into the filter bag is configured to be flipped open by a hinge structure. a plate, the hinge is provided with a spring; a pressing arm is arranged on the other side of the flap with reference to the hinge shaft; the pressing arm is provided with a pressing ear, and the pressing pipe is provided with a pressing rod at a position relative to the pressing ear; It can be composed of a plurality of foldable stacks, and the stacks are connected by hinges;

At least the outer edge of the stacking plate is provided with a guiding roller, and the guiding roller is provided with a folding sliding rail.
The baghouse dust removing device according to claim 11, wherein the windshield cover and the blowing pipe connecting device are four-bar linkages, one end of the four-bar linkage mechanism is connected to one side of the blowing pipe, and the other end is connected to the resistor. The wind cover plate is provided with a pulse gas-triggered gas push tube and a trigger push plate on the spray pipe, and the trigger power is pulsed gas; the trigger plate is provided with a hook, and the hook is provided on the opposite windshield cover; The push plate can be provided with a slider and a slider return spring or a slider reset weight, and the slider slides on a slide provided on the blow pipe; the trigger push plate can also be connected with a swing rod that rotates around a fixed shaft on the blow pipe. The cover plate is composed of a plurality of foldable stacking plates, and the stacking plates are connected by hinges; at least the outer edge of the stacking plates is provided with guiding rollers, and the folding rollers are provided with respect to the guiding rollers.
The baghouse dust removing device according to any one of claims 1-8 to 10-15, wherein the bag type dust removing device and the moving blowing pipe device are provided with a bag cover ( 26).
A baghouse dust removing device according to claim 16, wherein said baghouse dust removing device is provided with a buckle lever (27) and a buckle lever passage (32).
The baghouse dust removing device according to claim 17, wherein the bag cover plate (25) is provided with a buckle cover channel (32), and the corresponding position on the side wall of the clean air chamber is opened. The guiding hole (31) of the buckle lever (27) is introduced; the configured buckle lever (27) adopts a telescopic rod method, and an end portion of the buckle lever (27) is provided with an elbow.
The baghouse dust removing device according to any one of claims 16 to 16, wherein the bag type dust removing device is provided with a brake wire (28); and the brake wire (28) is outside the box. Inside the box, the wire of the wire of the brake wire (28) is connected to the bag cover (26) by a lever mechanism.
A bag filter, characterized in that the bag filter comprises the bag filter ash cleaning device according to any one of claims 1-19.
A method for moving a dusting device of a bag filter, characterized in that the bag type dust removing device according to any one of claims 1 to 19 comprises the following steps:

1) The blow pipe is fixed on the moving car or part of the car body. The moving car moves linearly and drives the blow pipe to move. It moves straight to the top of the filter bag that needs to be blown on any line, and is accurately aligned with the filter bag mouth. ;

2) A pulse valve is arranged on the air bag outside the clean air chamber, and the gas enters the air bag through the air bag inlet pipe and enters the air bag outlet pipe through the outlet of the pulse valve, and sequentially enters the gas pipe of the clean air chamber along the air bag outlet pipe, Spraying tube, nozzle, and jetting through the nozzle; the pulse time of the backflushing gas from the air bag is within 10 to 500 milliseconds, and the pressure before the gas pulse in the air bag is 0.05-0.7 MPa;

3) In step 2), the gas sprayed through the nozzle enters the filter bag through the filter bag mouth, bulges the bag body of the filter bag, and partially passes the filter material of the filter bag into the filter chamber, and the surface of the filter bag which is swollen is accelerated. Jitter, the dust on the outer surface of the filter bag is released from the outer surface of the filter bag by the shaking and the gas that passes through the filter bag into the filter chamber, and settles to the ash hopper, and is discharged through the ash hopper.
A method of moving dust cleaning of a bag filter according to claim 21, wherein

In step 2), the line is covered with a windshield cover that moves synchronously with the moving car or close to at least one line of the bag bag that has just been sprayed, so that the pressure inside the filter bag that covers the filter bag mouth and the filter bag The outside pressure is nearly the same, the choke cover remains in the capping position until the moving car leaves the blowing position, and moves to the next blowing position as the moving car moves.