CN107601056B - A parallel double-rotor pneumatic conveying feeder - Google Patents

Abstract

The invention discloses a parallel double-rotor pneumatic conveying feeder, which is applied in the field of bulk material conveying equipment. , there is an impeller in the impeller chamber, the rotating hub of the impeller is connected to the rotating shaft in the sealed bearing seat, and the rotating shaft is connected to the drive control system. There are two impeller chambers and impellers arranged side by side, correspondingly provided with two feed ports and Outlet. The drive control system includes reducer, variable frequency motor, speed detection element and induction board. It mainly solves the problems of low conveying accuracy, large air intake resistance, inflexible adjustment mode, low equipment space utilization rate and insufficient feeding capacity of the existing pneumatic conveying feeder equipment. The invention has many advantages such as high conveying precision of the pneumatic conveying feeder, high efficiency, stable and reliable process, flexible and convenient control, etc., and has good application prospect and value.

Description

A parallel double-rotor pneumatic conveying feeder

technical field

The invention belongs to the field of bulk material conveying equipment, and in particular relates to a parallel double-rotor pneumatic conveying feeder.

Background technique

In metallurgy and other industries, the pneumatic conveying of bulk materials has high requirements on conveying capacity and conveying precision. Using vertical rotary feeder for conveying can achieve higher conveying precision than ordinary fluidized pressurized method. The published Chinese patents for vertical feeders that are often used in engineering are: 201220205422.9, 201020619756.1, 201220673793.X, 201320480948.2, 201620306364.7, 201620622572.8. According to public information, a single feeder is usually one Rotor and a set The transmission device has a material inlet and a material outlet, and its main disadvantages are: the utilization rate of the equipment space is low, and the feeding capacity of the equipment is insufficient; if the equipment fails, there is no thermal backup measure, and it must be shut down for maintenance immediately; usually The single-outlet feeder can only spray one reactor, so one reactor needs to be equipped with at least one feeder, and it is often necessary to configure multiple feeders for one reactor to achieve the blowing capacity; in addition , At present, the air intake method of the equipment mainly adopts the side air intake method, the air intake resistance is relatively large, and the air use adjustment method is not flexible enough, resulting in a large waste of air source.

Published patents 201320485328.8 and 201310346847.0 show that there are multiple feed ports and discharge ports, but the shape of the feed ports and the shape of the blades or the conveying method of the material in the feeder are different from the traditional vertical rotary feeder. Different, its solution is mainly to solve the accuracy problem of the traditional fluidized pressurization method. Due to the limitation of the shape of the inlet and outlet, the shape of the blade, and the setting of the conveying method, compared with the ordinary vertical feeder, it is more expensive in terms of equipment capacity and equipment space. Utilization has not improved.

The published patent 201210217828.3 is a double-channel star feeder, mainly in the form of horizontal installation, which is quite different from the traditional vertical rotary feeder in the form of feeding and discharging materials and working methods. It is mainly in the form of a horizontal star valve According to public information, due to its inherent characteristics, the main performance is that the filling rate of this kind of feeding and discharging structure is not high for powder materials, resulting in that this kind of form is rarely used in occasions with high precision requirements.

Therefore, it is necessary to develop a parallel double-rotor pneumatic conveying feeder to achieve the purpose of high equipment capacity and equipment space utilization rate, high conveying accuracy, high efficiency, stable and reliable process, and flexible and convenient control.

Contents of the invention

In view of this, the object of the present invention is to provide a parallel double-rotor pneumatic conveying feeder to achieve high equipment capacity and space utilization of the pneumatic conveying feeder, high conveying accuracy, efficient, stable and reliable process, and flexible and convenient control.

To achieve the above object, the present invention provides the following technical solutions:

A parallel double-rotor pneumatic conveying feeder, including a top cover, an intermediate housing, a bottom plate and a sealed bearing seat arranged in sequence from top to bottom; the intermediate housing forms a closed impeller chamber with the top cover and the bottom plate, and the The impeller chamber is provided with an impeller, the rotating hub of the impeller is connected to the upper part of the rotating shaft in the sealed bearing seat, and the lower part of the rotating shaft is connected to the drive control system. The impeller chamber and the impeller have two independent are arranged side by side; the middle part of the top cover is provided with feed inlets respectively connected with the two impeller chambers, and the feed inlets are connected with the external blowing tank through the flange; A discharge port connected to the two impeller chambers, a discharge pipe connected to the discharge port is provided below the discharge port; an air intake cavity is provided at the lower part of the top cover facing the discharge port, and the upper air intake cavity of the top cover The location area is provided with a vertically downward opening, and an air intake pipe connected to the air intake chamber is provided at the opening position; an air hole plate with several openings is connected to the lower surface of the air intake chamber; the drive control The system can drive the rotating shaft to rotate and detect and regulate its rotational speed.

Preferably, the drive control system includes a reducer, a variable frequency motor, a speed detection element and an induction plate; the reducer is connected to the lower part of the rotating shaft; the frequency conversion motor is connected to the reducer; the speed detection element is arranged on the sealed bearing seat In the radial opening; the induction plate is arranged at the position where the rotating shaft radially faces the detection element; the detection element can receive the pulse signal of the induction plate and control the reducer and the frequency conversion motor; the upper part of the rotating shaft and the rotating hub, The connections between the lower part and the reducer are key connections.

Preferably, the cross-sectional shape of the feed inlet is the same as and concentric with the fan-shaped section of the impeller cavity grid formed by the adjacent blades of the impeller, and the two feed inlets are axially symmetrical along the center line where the length and width of the top cover are located; the flange The disc is a circular flange, the center of which is located at the intersection of the centerlines of the length and width of the top cover, and its inner circular hole does not block the cross-sectional area where the two feed ports are located; the air inlet pipe communicates with the external air source through the flange mechanism.

Preferably, it also includes a material guide plate arranged in the flange and arranged on both sides of the two feed ports in the width direction of the top cover; the outer surface of the material guide plate is a downward and inward slope and/or a curved surface , and does not block the cross-sectional area where the two feed ports are located, and the connection method with the flange is welding or fastener connection.

Preferably, the cross-sectional size of the discharge port is not smaller than the cross-sectional size of the impeller cavity; the two feed ports are axisymmetric along the center line of the length and width of the top cover; the air inlet chamber is located directly above the discharge port and The shapes are the same; the discharge pipe communicates with the external discharge port through a flange mechanism.

Preferably, the discharge pipe is composed of an upper section, a middle end and a lower section, and the middle section is connected with the upper section and the lower section curved surface through a partition with holes; the connection transition surface is circular, and the connection method is welding; The shape of the upper section matches the shape of the discharge opening, and the shape of the lower section matches the shape of the flange mechanism connected with the external discharge opening.

Preferably, there are at least two air intake pipes communicating with each air intake chamber, and a partition is arranged in the middle of each air intake chamber to divide it into multi-part cavities respectively corresponding to the above air intake pipes.

Preferably, sealing rings are provided between the connecting surface of the top cover and the middle casing, and between the connecting surface of the middle casing and the bottom plate, and the sealing rings are compressed between the connecting surfaces by bolts.

Preferably, the hub of the impeller is in the shape of a truncated cone with a small top and a large bottom.

Preferably, the connection relationship between the top cover, the middle shell, the bottom plate and the sealed bearing seat is any one of integral casting, welding or fastener connection; when it is connected by fasteners, the top cover and the bottom plate It is also connected by bolts; the lower part of the bottom plate is concentric with the impeller chamber, and a lower flange connected with the sealed bearing seat is provided.

The beneficial effects of the present invention are:

1. Since the feeder has speed detection elements and induction plates, it can realize precise control of the feeding amount and achieve the purpose of high-precision quantitative feeding in conjunction with the frequency conversion motor and reducer.

2. Since the feeder has two impeller chambers, impellers and supporting structures, the space utilization rate of the equipment is improved under the premise of ensuring the feeding accuracy, thereby improving the feeding capacity of a single equipment.

3. Since this feeder has two sets of conveying and feeding components, it can be realized that in the case of damage to any one set of components, the other set of components can be used normally, and the production is not stopped, and through the drive control system, Increase the conveying speed of a single set of feeder, so as to ensure the conveying volume required by production, or minimize the impact caused by the damage of a set of components of the feeder.

4. Since the feeder has two discharge ports, it can be piped according to the requirements of use, and it can be adapted to the situation of one reactor and two reactors at the same time, and the use and configuration are more flexible.

5. Since the air intake pipe of this feeder is set above the top cover, the area where the air cavity is located is provided with a vertically downward opening, so that the gas flow direction is consistent with the blowing direction, reducing gas resistance.

6. Since the feeder has a downward and inward inclined surface and/or a curved material guide plate, it can facilitate the smooth entry of materials into the impeller chamber of the feeder, improve the filling rate of materials, and thus improve the operating efficiency of the equipment .

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is an axial sectional view of the present invention;

Fig. 2 is a front sectional view of the internal structure of the present invention;

Fig. 3 is a top view of the present invention;

Fig. 4 is a partial sectional view of the structure of the impeller chamber.

The marks in the drawings are as follows: top cover 1, air intake pipe 11, air intake cavity 12, material guide plate 13, feed port 14, flange plate 15, air hole plate 16, partition plate 17, middle shell 2, impeller chamber 21. Impeller 3, impeller cavity grid 31, hub 32, blade 33, bottom plate 4, discharge port 41, discharge pipe 42, sealed bearing seat 5, rotating shaft 51, reducer 52, frequency conversion motor 53, speed detection element 54 , Inductive plate 55.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1 to 4, a parallel double-rotor pneumatic conveying feeder includes a top cover 1, an intermediate housing 2, a bottom plate 4 and a sealed bearing seat 5 arranged in sequence from top to bottom; the intermediate housing 2 and the top The cover 1 and the bottom plate 4 form a closed impeller chamber 21, the impeller chamber 21 is provided with an impeller 3, the rotating hub 32 of the impeller 3 is connected with the upper part of the rotating shaft 51 in the sealed bearing seat 5, and the rotating shaft The lower part of 51 is connected with the drive control system, and it is characterized in that: the impeller chamber 21 and the impeller 3 are arranged side by side independently; The feed port 14, the feed port 14 communicates with the external blowing tank through the flange 15; the two ends of the bottom plate 4 are provided with discharge ports 41 respectively connected to the two impeller chambers, and the discharge ports 41 below is provided with the discharge pipe 42 that communicates with it; The lower part of the top cover 1 is facing the discharge port 41 and has an air intake chamber 12, and the upper part of the top cover 1 where the air intake chamber 12 is located is provided with a vertically downward The opening of the opening is provided with the air intake pipe 11 communicating with the air intake chamber 12 at the opening position; the lower surface of the air intake chamber 12 is connected with an air hole plate 16 with several openings; the drive control system can drive the rotating shaft 51 Rotate and detect and regulate its rotational speed.

Further, the drive control system used in this embodiment includes a reducer 52, a variable frequency motor 53, a speed detection element 54 and an induction plate 55; the reducer 52 is connected to the lower part of the rotating shaft 51; the variable frequency motor 53 is connected to the reducer 52 The speed detection element 54 is arranged in the radial opening of the sealed bearing seat 5; the induction plate 55 is arranged at the position where the rotating shaft 51 radially faces the detection element 54; the detection element 54 can receive the pulse signal of the induction plate 55 And control the speed reducer 52 and the variable frequency motor 53; the connection between the upper part of the rotating shaft 51 and the rotating hub 32, and the lower part and the speed reducer 52 are key connections.

Working conditions: the external blowing tank is connected to the feed port 14 through the flange 15 and feeds into the two impeller chambers 21, and at the same time, the external blowing gas source feeds high-pressure gas into the intake pipe 11, and passes through the air cavity The vertically downward openings in the area where 12 is located and the air hole plate 16 vertically send air into the impeller chamber 21, and the impeller 3 rotates under the direct drive of the rotating shaft 51, and pushes the material to the discharge port 41 in rotation. The gas is conveyed by pneumatic pressure, and the material is blown into the discharge pipe 42, and is transported to the reactor through the outlet flange structure of the discharge pipe and the factory pipeline connection.

Since the feeder has two independent impeller chambers, the impeller and its matching feed inlet, air inlet chamber, discharge outlet, discharge pipe and other structures, the space of the equipment is improved under the premise of ensuring the feeding accuracy. Utilization, thereby increasing the feeding capacity of a single device. Furthermore, the existence of two sets of components can realize that in the case of damage to any one set of components, the other set of components can be used normally, and the production is not stopped, and the above-mentioned drive control system can be used to increase the capacity of a single set of feeders. Conveying speed, so as to ensure the conveying volume required by production, or minimize the impact caused by the damage of a set of components to the feeder.

Since this feeder has two discharge pipes, it can be piped according to the requirements of use. When only one reactor needs to be sprayed, the two discharge pipes can be collected into one pipeline to spray one reactor. At the same time, it is also possible to take over the pipe separately to blow to the two reactors. It can be adapted to the situation of being used as a reactor and feeding two reactors at the same time, and the use and configuration mode are more flexible.

Since the feeder inlet pipe 11 is arranged above the top cover, the area where the air cavity 12 is located is provided with a vertically downward opening, so that the gas flow direction is consistent with the blowing direction, reducing gas resistance.

Since this feeder has a speed detection element 54 and an induction plate 55, the speed detection element 54 detects the rotation speed of the rotation shaft 51 through the induction plate 55 on the induction shaft 51, so that the rotation speed of the impeller 3 can be fed back to the external control system. According to the calculated target speed required by the feeder, the rotation of the variable frequency motor 53 is further adjusted, and the speed of the rotating shaft 51 is regulated through the reducer 52 connected to it, thereby adjusting the speed of the impeller 3 . Because the amount of feed per unit time is determined by the amount that the channel is sent to the discharge port 41 per unit time, so the feed rate depends on the speed of rotation of the impeller 3 when the volume of the channel is constant. Therefore, this feeder can realize the precise control of the feeding amount and achieve the purpose of high-precision quantitative feeding.

Because the upper part of the rotating shaft 51 that this feeder adopts and the rotating hub 32, the connection between the lower part and the speed reducer 52 is a key connection. This design ensures a more stable and reliable connection between the transmission components.

Further, the cross-sectional shape of the feed inlet 14 used in this embodiment is the same as and concentric with the fan-shaped section of the impeller cavity grid 31 formed by the adjacent blades 33 of the impeller 3, and the two feed inlets are on the same center line along the length and width of the top cover. Axisymmetric; the flange 15 is a circular flange, the center of which is located at the intersection of the centerlines where the length and width of the top cover are located, and its inner circular hole does not block the cross-sectional area where the two feed ports are located; the air inlet pipe 11 passes through The flange mechanism communicates with the external air source. Certainly, and those skilled in the art should know that the above-mentioned identical, concentric or axisymmetric designs are only preferred in this embodiment, and other formal transformations that do not affect performance, such as matching similarities, are also possible. Deviate from the gist of the design of the present invention.

Further, the feeder used in this embodiment also includes material guide plates 13 arranged in the flange plate 15 and arranged on both sides of the two feed ports 14 in the width direction of the top cover; The surface is a downward and inward slope and/or a curved surface, and does not block the cross-sectional area where the two feed inlets are located, and its connection with the flange 15 is by welding or fasteners. The material passes through the flange 15, follows the material guide plate 13, and enters the impeller cavity grid 31 from the feed port 14. The material not only depends on gravity, but also has a high pressure in the spray tank, so that the material can fully flow in the impeller cavity grid 31. filling. The design of the material guide plate facilitates the smooth entry of materials into the impeller chamber 21 of the feeder, increases the filling rate of materials, and thus improves the operating efficiency of the equipment.

Further, the cross-sectional size of the discharge port 41 used in this embodiment is not smaller than the cross-sectional size of the impeller cavity grid 31; the two feed ports are axisymmetric along the center line where the length and width of the top cover are located; the air inlet chamber 12 is located at the outlet The discharge port 41 is directly above and has the same shape as the discharge port; the discharge pipe 42 communicates with the external discharge port through a flange mechanism.

Further, the discharge pipe 42 used in this embodiment is composed of upper section, middle end and lower section. The middle section is connected with the upper section and the lower section curved surface through a partition with holes; the connection transition surface is circular, and the connection method is Welding; the shape of the upper section matches the shape of the discharge opening 41, and the shape of the lower section matches the shape of the flange mechanism communicating with the external discharge opening.

Further, in the feeder used in this embodiment, there are two air intake pipes 11 communicating with each air intake chamber 12, and a partition 17 is arranged in the middle of each air intake chamber 12, which is divided into two pipes corresponding to the above two pipes respectively. The left and right parts of the intake pipe 11 are cavities. This design can increase the input volume of blowing air, so that the efficiency of pneumatic conveying is higher. Each air intake cavity 12 is divided into two cavities, and corresponds to two air intake pipes 11, and the air intake volume of each air intake pipe 11 can be adjusted as required to achieve the purpose of saving air consumption.

Further, sealing rings are provided between the connecting surfaces of the top cover 1 and the middle casing 2 used in this embodiment, and between the connecting surfaces of the middle casing 2 and the bottom plate 4, and the sealing rings are compressed by bolts between the connecting surfaces. . This design can disperse the high pressure inside the feeder due to the material and high pressure blowing gas.

Further, the hub 32 of the impeller 3 used in this embodiment is in the shape of a truncated cone with a small top and a big bottom. Therefore, the cavity of the impeller is in the shape of a large top and a small bottom. This design facilitates the flow of materials and fully fills the cavity.

Further, the connection relationship between the top cover 1, the middle casing 2, the bottom plate 4 and the sealed bearing seat 5 used in this embodiment is any one of casting, welding or fastener connection; when it is a fastener When connecting, the top cover 1 and the bottom plate 4 are also connected by bolts; the lower part of the bottom plate 4 is concentric with the impeller chamber 21 and is provided with a lower flange connected with the sealing bearing seat 5 .

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that it can be described in terms of form and Various changes may be made in the details without departing from the scope of the invention defined by the claims.

Claims (10)

1. A parallel double-rotor pneumatic conveying feeder, comprising a top cover, an intermediate housing, a bottom plate and a sealed bearing seat arranged in sequence from top to bottom; the intermediate housing forms a closed impeller chamber with the top cover and the bottom plate , the impeller chamber is provided with an impeller, the impeller hub is connected to the upper part of the shaft in the sealed bearing seat, and the lower part of the shaft is connected to the drive control system, characterized in that: the impeller chamber and There are two independent impellers arranged side by side; the middle part of the top cover is provided with feed ports respectively connected to the two impeller chambers, and the feed ports are communicated with the external spray tank through the flange; the bottom plate Both ends are provided with discharge ports respectively connected with the two impeller chambers, and a discharge pipe connected with the discharge ports is provided below the discharge ports; The area where the upper air intake chamber of the cover is located is provided with a vertically downward opening, and an air intake pipe communicating with the air intake chamber is provided at the opening position; an air hole with several openings is connected to the lower surface of the air intake chamber plate; the drive control system can drive the rotating shaft to rotate and detect and regulate its rotational speed. 2. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: the drive control system includes a speed reducer, a frequency conversion motor, a speed detection element and an induction plate; the lower part of the speed reducer and the rotating shaft connection; the frequency conversion motor is connected to the reducer; the speed detection element is set in the radial opening of the sealed bearing seat; the induction plate is set at the position where the rotating shaft is radially opposite to the detection element; the detection element can receive the pulse of the induction plate signal and control the reducer and the variable frequency motor; the connections between the upper part of the rotating shaft and the hub, and the lower part and the reducer are key connections. 3. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: the cross-sectional shape of the feed inlet is the same as and concentric with the fan-shaped cross-section of the impeller cavity grid formed by the adjacent blades of the impeller, and two The feed inlet is symmetrical along the center line of the length and width of the top cover; the flange is a circular flange whose center is located at the intersection of the center line of the length and width of the top cover, and its inner circular hole does not block the two feeding The cross-sectional area where the mouth is located; the air inlet pipe communicates with the external air source through the flange mechanism. 4. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: it also includes material guide plates arranged in the flange and arranged on both sides of the two feed ports in the width direction of the top cover; The outer surface of the material guide plate is a downward and inward slope and/or a curved surface, and does not block the cross-sectional area where the two feed inlets are located, and its connection with the flange is by welding or fasteners. 5. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: the cross-sectional size of the discharge port is not smaller than the cross-sectional size of the impeller cavity; the two feed ports are located along the length and width of the top cover. The center lines are all axisymmetric; the air inlet cavity is located directly above the discharge port and has the same shape; the discharge pipe communicates with the external discharge port through a flange mechanism. 6. The parallel double-rotor pneumatic conveying feeder according to claim 5, characterized in that: the discharge pipe is composed of an upper section, a middle section, and a lower section, and the middle section is connected to the upper section and the lower section through a partition with holes. The curved surface is lofted and connected; the connection transition surface is circular, and the connection method is welding; the shape of the upper section matches the shape of the discharge opening, and the shape of the lower section matches the shape of the flange mechanism connected to the external discharge opening. 7. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: there are at least two air intake pipes communicating with each air intake chamber, and a partition is arranged in the middle of each air intake chamber to divide it into Respectively correspond to the multi-part cavities of the above-mentioned intake pipes. 8. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: sealing rings are provided between the connecting surface of the top cover and the middle casing, and between the connecting surface of the middle casing and the bottom plate , and the sealing ring is compressed by bolt connection between the connecting surfaces. 9. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: the hub of the impeller is in the shape of a circular truncated cone with a small top and a big bottom. 10. The parallel double-rotor pneumatic conveying feeder according to claim 1, characterized in that: the connection relationship between the top cover, the middle casing, the bottom plate and the sealed bearing seat is integrally cast, welded or fastened Any one of the connection of fasteners; when it is connected by fasteners, the top cover and the bottom plate are also connected by bolts; The lower part of the bottom plate is concentric with the impeller chamber and is provided with a lower flange connected with the sealing bearing seat.

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