CN211117631U

CN211117631U - Flue gas valve

Info

Publication number: CN211117631U
Application number: CN201921440370.1U
Authority: CN
Inventors: 王春明
Original assignee: Jinzhou Ningyuan Control Technology Co ltd
Current assignee: Jinzhou Ningyuan Control Technology Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-07-28
Anticipated expiration: 2029-08-30

Abstract

The utility model relates to a valve, and discloses a smoke valve, which comprises a valve body and a valve plate, wherein the side wall of the valve body is provided with an input shaft, and the side wall of the valve body is arranged right opposite to the position of the input shaft and is provided with an air inlet pipe; the air inlet pipe is provided with an air inlet, an inflation inlet and a rotating shaft port which are communicated with each other, the inflation inlet is connected with the side wall of the valve body, a valve shaft is arranged in the rotating shaft port and extends out of the inflation inlet, a valve core is arranged on the valve shaft, and the valve core is connected with an external inflation device; the valve plates are connected to the input shaft and the valve shaft, and an inner valve cavity is formed between the two layers of valve plates, the side wall of the valve body and the vent hole; when the smoke valve is closed, the valve plate is communicated with the cavity in the valve and the air inlet, and when the smoke valve is opened, the valve shaft rotates to an angle, so that the side wall of the valve shaft covers the air inlet; the air inlet valve body and the valve shaft device with independent functions are set to be an assembly with integrated functions, and the air inlet is arranged in the valve shaft, so that the cost is reduced.

Description

Flue gas valve

Technical Field

The utility model relates to a valve, more specifically say, it relates to a flue gas valve.

Background

The smoke valve adopts a top-mounted structure, connecting bolts of the valve body are reduced under the conditions of high pressure and large caliber, the reliability of the valve is enhanced, and the influence of the dead weight of the system on the normal work of the valve can be overcome. The flue gas valve is widely applied to the coal chemical industry, the petrochemical industry, the rubber, the papermaking, the pharmacy and other pipelines as the flow dividing and converging or flow direction switching device of the medium. Because the flue gas is at the exhaust in-process, the flue gas is very light, and the gas pressure is very little in the pipeline, because there is narrow and small gap between valve plate and the pipeline inner wall again, can have the flue gas to spill over, consequently needs the flue gas valve.

In the prior art, a valve plate of a flue gas valve is provided with two pieces, and an inner cavity of the valve is formed. An air inlet valve is additionally arranged on the outer wall of the flue gas valve, and an external high-pressure air source is filled with air into the valve inner cavity through the air inlet valve, so that the air pressure in the valve inner cavity is increased, a narrow gap is blocked by the high-pressure air, the flue gas is prevented from overflowing through the narrow gap, and the air tightness is achieved.

The air inlet valve body and the valve rotating device of the traditional smoke valve are arranged independently. By using the processing mode, the air inlet valve body needs to be provided with a square hole on the arc surface corresponding to the gap between the valve plates, and a cylindrical air inlet valve is welded on the periphery of the hole. Because the valve is very narrow, and the air inlet is the rectangle, and the valve is circular, needs to do the circular change into square reducing, and the big and long messenger's of welding cost of the degree of difficulty of welding like this processing cost can be very high.

SUMMERY OF THE UTILITY MODEL

Big and with high costs technical problem of the welding degree of difficulty in the production manufacturing process to current flue gas valve, the utility model provides a flue gas valve, it has the advantage that the production degree of difficulty is little, with low costs.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a flue gas valve comprises a valve body and two layers of valve plates which are rotatably connected inside the valve body and used for blocking flue gas, wherein the valve body is rotatably connected with an input shaft, the input shaft is fixedly connected with the valve plates, and the outside of the valve body is fixedly connected and communicated with a gas inlet pipe; the air inlet pipe is provided with an air inlet, an inflation inlet and a rotating shaft port which are communicated, the periphery of the inflation inlet is fixedly connected with the side wall of the valve body, a valve shaft is embedded in the rotating shaft port, one end of the valve shaft extends into the valve body through the inflation inlet and is fixedly connected with the valve plate, and a valve core used for controlling the on-off of the air inlet is arranged on the valve shaft;

the smoke gas valve is characterized in that a vent hole is formed between the valve core and the gas inlet pipe, an inner valve cavity is formed between the two layers of the valve plates and the side wall of the valve body, when the smoke gas valve is in a closed state, the inner valve cavity is communicated with the gas inlet, when the smoke gas valve is in an open state, the valve shaft rotates to a set angle, the side wall of the valve core shields and blocks the gas inlet, and the inner valve cavity is not communicated with the gas inlet.

Through the technical scheme, the valve core is arranged on the valve shaft, so that related components such as an air inlet valve body and the like do not need to be additionally arranged, and the cost is reduced; the valve body does not need parts with complex shapes, so that the processing difficulty is reduced, and the cost is reduced; in addition, the on-off of the air inlet sealing air is controlled in a mechanical mode and keeps synchronous with the on-off of the valve body; when the smoke valve is in a closed state, the plane of the valve plate is rotated to a position vertical to the axial core line of the valve shaft, the air inlet is communicated with the cavity in the valve, the external air inlet device is opened, and sealing gas is filled in the cavity in the valve, so that the overflow of smoke is stopped; when the smoke valve is in a fully opened state, the axis line of the valve body is parallel to the plane of the valve plate, and the valve shaft rotates to an angle to just shield the air inlet, so that the sealed air of the air inlet is prevented from entering the cavity in the valve, and therefore, the electric appliance fault and functional disorder caused by improper operation and the like can be effectively avoided.

Furthermore, the valve core is arranged at the end part, close to the valve body, in the valve shaft, one opening of the vent hole is positioned on the side wall of the valve shaft, and when the smoke valve is in a closed state, the vent hole is communicated with the air inlet.

Through the technical scheme, the valve core is arranged in the middle of the valve shaft, the valve shaft not only realizes the rotation of the valve plate, but also controls the on-off of the air inlet, so that the structure is simplified, and the cost is saved.

Furthermore, the valve core is positioned at the end part of the valve shaft far away from the valve body and is connected with the valve shaft in a rotating way.

Through the technical scheme, the valve shaft drives the valve core to rotate, so that the valve shaft and the valve core realize synchronous effect, the distance between the valve core arranged outside and the valve body is far, the temperature requirement is not high, and the cost is reduced.

Further, a shaft end cover is fixedly connected between the rotating shaft port and the bearing assembly; the shaft end cover is fixedly connected with a bearing assembly in the direction away from the rotating shaft opening, and the valve shaft is rotatably connected with the bearing assembly.

Through the technical scheme, the friction force between the end part of the valve shaft extending out of the shaft end cover and the shaft end cover is reduced by the bearing assembly, and the service life of the shaft valve is prolonged; the shaft end cover is beneficial to reducing the falling of dust, thereby reducing the influence on the rotation of the valve shaft.

Furthermore, the valve shaft extends out the end part of the inflation inlet and is integrally formed with two fixing parts opposite in position, the two fixing parts are respectively arranged at two sides of the opening of the vent hole close to the valve plate, and the two layers of the valve plate are respectively and fixedly connected to the inner sides of the two fixing parts.

Through above-mentioned technical scheme, the valve shaft drives the valve plate synchronous revolution, arranges the fixed part in the valve plate outside and plays the effect of support to the rotation of valve plate.

Furthermore, the peripheral sides of the two layers of the valve plates are fixedly connected through a plurality of fixing pieces.

Through above-mentioned technical scheme, increased the stability of connecting between the valve plate, increased the stability of cavity in the valve promptly, made it can bear the pressure of high-pressure sealed air.

Furthermore, the both ends of valve body outwards extend have be used for with flue gas pipeline fixed connection's extension, both ends fixedly connected with support arm between the extension.

Through above-mentioned technical scheme, the support arm has increased the stability of valve body structure.

Furthermore, a first sealing ring is arranged between the shaft end cover and the rotating shaft opening, and a second sealing ring is arranged between the valve shaft and the air inflation opening.

Through the technical scheme, the first sealing ring increases the sealing property between the valve shaft and the shaft end cover; when the flue gas valve is in a closed state, the second sealing ring increases the sealing property between the valve body and the air inlet pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the air inlet valve body and the valve shaft with independent functions are arranged into a functional integrated component, the valve core is arranged on the valve shaft, and the air inlet is arranged at the valve core; when the air inlet is communicated with the valve core, the smoke valve is in a closed state at the moment, an inner valve cavity communicated with the air inlet is formed between the valve plate and the valve body and between the valve plate and the air inlet, high-pressure sealing air is filled into the air inlet at the moment, and the high-pressure sealing air overflows from a narrow gap between the valve plate and the valve body, so that smoke is prevented from passing through the valve plate through the narrow gap; when the valve shaft rotates to a set angle, the valve core completely shields the ventilation of the air inlet, at the moment, the cavity in the valve between the valve plates is communicated with the smoke, and the smoke valve is in an open state to discharge the smoke; the valve shaft and the air inlet are synchronously arranged, so that the manufacturing cost is saved, the operation is simple, and functional disorder caused by electric appliance faults is prevented;

(2) the valve core is arranged in the middle of the valve shaft, and the valve shaft rotates and controls the on-off of the air inlet at the same time, so that the structure is simplified, the material cost is saved, the machining mode of the valve shaft is simple, and the machining difficulty is reduced;

(3) the valve core is arranged at the end part of the valve shaft, so that the valve core is far away from the valve body, the requirement on the temperature of the valve core is not high, and the cost is reduced.

Drawings

FIG. 1 is a schematic overall structure diagram according to a first embodiment;

FIG. 2 is a schematic diagram of an exploded structure according to the first embodiment;

FIG. 3 is a schematic partial cross-sectional view of an embodiment showing an inlet duct with a flue valve closed;

FIG. 4 is a schematic partial cross-sectional view of a flue valve open showing an inlet duct according to an embodiment;

fig. 5 is a schematic partial cross-sectional view illustrating an air inlet pipe according to a second embodiment.

Reference numerals: 1. a valve body; 2. a valve plate; 3. an input shaft; 4. an air inlet pipe; 5. an air inlet; 6. an inflation inlet; 7. a shaft opening; 8. a valve shaft; 9. a vent hole; 10. a valve inner cavity; 11. a fixed part; 12. a valve core; 13. a fixing member; 14. a shaft end cover; 15. a first seal ring; 16. a second seal ring; 17. a bearing assembly; 18. an extension portion; 19. a support arm.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example one

A flue gas valve is shown in figures 1 and 2 and comprises a hollow cylindrical valve body 1 and two disc-shaped valve plates 2 arranged inside the valve body 1, wherein the valve plates 2 are used for shielding flue gas passing through the valve body 1. The side wall of the valve body 1 is rotatably connected with a penetrating input shaft 3, and the straight line of the input shaft 3 is vertical to the surface of the side wall of the valve body 1. The side wall of the valve body 1 opposite to the input shaft 3 is fixedly connected with an air inlet pipe 4, and the air inlet pipe 4 penetrates through the inner side of the valve body 1. The air inlet pipe 4 is set in a three-way mode, and the air inlet pipe 4 comprises an air inlet 5, an air charging port 6 (see fig. 4) and a rotating shaft port 7. The charging port 6 is communicated with the inner side of the valve body 1; a valve shaft 8 is embedded in the rotating shaft opening 7, and the outer diameter size of the valve shaft 8 is matched with the inner diameter size of the rotating shaft opening 7; a valve core 12 is arranged in the middle of the valve shaft 8, a vent hole 9 is formed in the valve core 12, and the vent hole 9 is communicated with the air inlet 5 and the inflation inlet 6; the air inlet 5 is connected to an external inflator. The two layers of valve plates 2 are respectively fixed on the parts of the input shaft 3 and the valve shaft 8 which are positioned at the inner side of the valve body 1, the peripheral sides of the two layers of valve plates 2 are fixedly connected through a plurality of fixing pieces 13, and the fixing pieces 13 are distributed at equal intervals on the circumference.

The part of the valve shaft 8 extending into the valve body 1 is provided with an integrally formed fixing part 11, the fixing parts 11 are positioned at two sides of the opening of the vent hole 9, and the valve plate 2 is fixed between the two fixing parts 11. One end of the rotating shaft opening 7 is fixedly connected with a shaft end cover 14, and one end of the valve shaft 8 extending out of the rotating shaft opening 7 is set to be smaller than the outer diameter of the valve shaft 8 positioned in the rotating shaft opening 7 in diameter and penetrates through the shaft end cover 14. The side of the shaft end cover 14 far away from the rotating shaft opening 7 is fixedly connected with a bearing assembly 17, and the end part of the valve shaft 8 extending out of the shaft end cover 14 is rotatably connected with the bearing assembly 17.

A first sealing ring 15 is arranged between the valve shaft 8 and the shaft end cover 14; a second sealing ring 16 is arranged between the valve shaft 8 and the air charging opening 6. The shape of the hole of the air inlet 5 is matched with the shape of the opening of the vent hole 9 on the side wall of the valve shaft 8, and the shape is preferably a cylindrical shape or a square column shape. The both ends of valve body 1 outwards extend and have the extension 18 that is connected with the outside pipeline, and fixedly connected with a plurality of support arms 19 between the extension 18 at both ends, and support arm 19 is the equidistant distribution of circumference in the lateral wall department of valve body 1.

During operation, as shown in fig. 2 and 3, when the flue gas valve needs to be in a closed state, the input shaft 3 is rotated; the valve plate 2 and the valve shaft 8 are driven to rotate, so that the plane where the valve plate 2 is located is perpendicular to the axial core line of the valve body 1, and the valve plate 2 blocks the discharge of smoke. However, due to the narrow gap between the valve plate 2 and the valve body 1, part of the smoke overflows. At this time, the vent hole 9 on the valve shaft 8 is communicated with the air inlet 5, and the air inlet device is opened to fill the cavity 10 in the valve with high-pressure sealing gas, such as air. The high-pressure gas forms an air pressure higher than the air pressure of the smoke gas in the cavity 10 in the valve, and the high-pressure gas partially discharges the gas from the narrow gap between the valve plate 2 and the valve body 1, so that the smoke gas is prevented from overflowing from the narrow gap. As shown in fig. 2 and 4, when the flue gas valve needs to be fully opened, the input shaft 3 is rotated, and the valve plate 2 and the valve shaft 8 are rotated. The axial core line of the valve body 1 is positioned on the surface of the valve plate 2, and at the moment, the side wall of the valve shaft 8 shields the air inlet of the air inlet 5. Even if there is the entrance of the sealing air, the sealing air does not enter the inside of the valve body 1 due to the shielding of the valve shaft 8.

The sealing gas of the gas inlet 5 is filled into the valve inner cavity 10 through the vent hole 9 in the valve shaft 8, so that the additional increase of a gas inlet valve body is avoided. The structure is simplified, the manufacturing cost is saved, the processing difficulty is reduced, and meanwhile, the on-off state of the valve core 12 is synchronous with the on-off state of the valve plate 2. The function disorder of the smoke valve caused by the asynchronous control of the sealing air control valve and the valve plate 2 can be avoided due to machine faults or misoperation.

Example two

A smoke valve is different from the first embodiment in that as shown in FIG. 5, a valve core 12 is positioned at the end part of a valve shaft 8 far away from a valve body 1, and the direction of an air inlet pipe 4 is bent and extended and is positioned at the end part of the valve shaft 8 far away from the valve body 1 to form a new air inlet pipe 4. And when the valve shaft 8 rotates, the valve shaft 8 drives the valve core 12 to rotate, so that the on-off of the air inlet valve body and the on-off of the valve plate 2 are kept synchronous.

The on-off of the sealing air is controlled by a mechanical mode, and the sealing air is kept synchronous with the switch of the valve plate 2, so that the electric appliance fault and functional disorder caused by improper operation and the like can be effectively avoided. The valve body 1 does not need complex parts, the processing difficulty is low, and the cost is reduced. The valve core 12 is arranged outside the far end, so that the distance between the valve core 12 and the valve body 1 is far, the temperature requirement is not high, and the cost is reduced.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A flue gas valve comprises a valve body (1) and two layers of valve plates (2) which are rotatably connected inside the valve body (1) and used for blocking flue gas, and is characterized in that the valve body (1) is rotatably connected with an input shaft (3), the input shaft (3) is fixedly connected with the valve plates (2), and the valve body (1) is fixedly connected with the outside and communicated with an air inlet pipe (4); the air inlet pipe (4) is provided with an air inlet (5), an air charging port (6) and a rotating shaft port (7) which are communicated, the periphery of the air charging port (6) is fixedly connected with the side wall of the valve body (1), a valve shaft (8) is embedded into the rotating shaft port (7), one end of the valve shaft (8) extends into the valve body (1) through the air charging port (6) and is fixedly connected with the valve plate (2), and a valve core (12) for controlling the on-off of the air inlet (5) is fixedly arranged on the valve shaft (8);

valve core (12) with form air vent (9) between intake pipe (4), two-layer valve plate (2) with form valve inner cavity (10) between the lateral wall of valve body (1), when flue gas valve is in the closed condition, valve inner cavity (10) with air inlet (5) are linked together, when flue gas valve is in the open condition, valve shaft (8) are changeed to the settlement angle, the lateral wall of valve core (12) shelters from and blocks up air inlet (5), valve inner cavity (10) with air inlet (5) do not communicate.

2. A flue valve according to claim 1, wherein the valve core (12) opens in the valve shaft (8) near the end of the valve body (1), and one of the openings of the ventilation hole (9) is located at the side wall of the valve shaft (8), the ventilation hole (9) communicating with the inlet port (5) when the flue valve is in the closed state.

3. A flue gas valve according to claim 1, characterised in that the valve core (12) is located at the end of the valve shaft (8) remote from the valve body (1) and is rotatably connected to the valve shaft (8).

4. A flue gas valve according to claim 1, wherein a shaft end cover (14) is fixedly connected between the shaft opening (7) and the bearing assembly (17); the shaft end cover (14) is fixedly connected with a bearing assembly (17) in the direction away from the rotating shaft opening (7), and the valve shaft (8) is rotatably connected with the bearing assembly (17).

5. The smoke valve according to claim 1, wherein the end of the valve shaft (8) extending out of the air charging port (6) is integrally formed with two fixing portions (11) which are opposite to each other, the two fixing portions (11) are respectively arranged at two sides of the vent hole (9) close to the opening of the valve plate (2), and the two layers of valve plates (2) are respectively and fixedly connected to the inner sides of the two fixing portions (11).

6. A flue gas valve according to claim 1, characterized in that the peripheral sides of the two layers of valve plates (2) are fixedly connected by a plurality of fixing pieces (13).

7. A flue gas valve according to claim 1, wherein the two ends of the valve body (1) extend outwards to form extending portions (18) fixedly connected with a flue gas pipeline, and a supporting arm (19) is fixedly connected between the extending portions (18) at the two ends.

8. A flue gas valve according to claim 4, wherein a first sealing ring (15) is arranged between the shaft end cover (14) and the rotating shaft port (7), and a second sealing ring (16) is arranged between the valve shaft (8) and the charging port (6).