CN210218729U

CN210218729U - Knife gate valve

Info

Publication number: CN210218729U
Application number: CN201921059055.4U
Authority: CN
Inventors: Xuezheng Wang; 王学政; Xiaoming Chen; 陈小鸣; Jian Zhou; 周健; Yili Wang; 王依立; Xing Su; 苏醒
Original assignee: Zhejiang Same General Automatic Control Equipment Ltd By Share Ltd
Current assignee: Zhejiang Same General Automatic Control Equipment Ltd By Share Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-03-31
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to a knife gate valve, which comprises a valve body, the flashboard is installed in the valve body, be provided with the runner that seals or open by the flashboard in the valve body, the runner includes the runner that advances, it reaches middle runner to flow out, the flashboard includes first flashboard, the second flashboard, first flashboard and second flashboard fixed connection, and first flashboard is located second flashboard top, the second flashboard runs through along the runner direction and is provided with the intercommunicating pore, the valve body is located middle runner below be provided with the leak protection chamber of second flashboard shape size looks adaptation, leak protection chamber and middle runner communicate each other, when first flashboard be located middle runner, the second flashboard is located the leak protection intracavity, the runner is in the closed condition, second flashboard when be located the runner, the runner is in. Adopt above-mentioned scheme, provide one kind through set up the second flashboard below first flashboard for the disk seat supports in the flashboard and can not produce the unstable phenomenon that leads to the perk to drop of atress no matter under what kind of state homogeneous phase, thereby guarantees disk seat job stabilization's a knife gate valve.

Description

Knife gate valve

Technical Field

The utility model relates to a valve field, concretely relates to knife gate valve.

Background

The knife gate valve is a valve which uses a gate plate to control the opening and closing of a flow passage.

The existing knife gate valve generally comprises a valve body, a gate plate and a controller, the gate plate is installed in the valve body, a flow channel which is closed or opened by the gate plate is arranged in the valve body, the flow channel comprises a flow inlet channel, a flow outlet channel and a middle flow channel, the gate plate slides and is arranged in the middle flow channel, the flow inlet channel and the flow outlet channel are respectively positioned on two sides of the gate plate, the flow inlet channel and the flow outlet channel are respectively provided with a valve seat which is matched with the gate plate in a sealing mode, the controller is arranged in a linkage mode with the gate plate, the controller comprises an air cylinder which drives the gate plate to move up and down and a valve rod which is connected with.

The gate plate of the knife gate valve generally moves downwards in the middle runner, so that the gate plate is extruded between the valve seats of the inlet runner and the outlet runner to separate the inlet runner and the outlet runner to realize sealing, and the gate plate moves upwards to separate from the valve seats of the inlet runner and the outlet runner to realize opening of the communication between the inlet runner and the outlet runner. Therefore, under the condition that the valve seat moves up and down on the flashboard in the long-term use process, the situation that the lower end of the valve seat is unstable in stress and is tilted to be separated from the valve body easily occurs, so that the sealing performance of the valve seat is invalid, the leakage phenomenon is caused, and even the peripheral parts are damaged by the disordered internal part structure.

Disclosure of Invention

Not enough to prior art exists, the utility model aims to provide a through set up the second flashboard below first flashboard for the disk seat is supported in the flashboard and can not produce the unstable phenomenon that leads to the perk to drop of atress no matter under what kind of state homogeneous phase, thereby guarantees disk seat job stabilization's a knife gate valve.

In order to achieve the above purpose, the utility model provides a following technical scheme: the gate comprises a valve body, a gate plate and a controller, wherein the gate plate is arranged in the valve body, a flow passage which is closed or opened by the gate plate is arranged in the valve body, the flow passage comprises an inlet flow passage, an outlet flow passage and a middle flow passage, the gate plate is arranged in the middle flow passage in a sliding manner, the inlet flow passage and the outlet flow passage are respectively positioned at two sides of the gate plate, a valve seat which is in sealing fit with the gate plate is arranged in the flow passage, the controller is in linkage with the gate plate and comprises an air cylinder which drives the gate plate to move up and down and a valve rod which is connected with the air cylinder and the gate plate, the gate plate comprises a first gate plate which is used for separating the inlet flow passage and the outlet flow passage and a second gate plate which is used for communicating the inlet flow passage and the outlet flow passage, the first gate plate is fixedly connected with the second gate plate, the first, the leakage-proof cavity is communicated with the middle runner, the second flashboard is positioned in the leakage-proof cavity when the first flashboard is positioned in the middle runner, the runner is in a closed state, and the second flashboard is positioned in the runner which is in an open state.

By adopting the technical scheme, the gate plate is arranged into the first gate plate for sealing the flow channel and the second gate plate for opening the flow channel, when the first gate plate is positioned in the middle flow channel, the valve seat abuts against the first gate plate to realize sealing, the first gate plate separates the inflow channel from the outflow channel to realize flow channel sealing, and when the second gate plate is positioned in the middle flow channel, the valve seat abuts against the second gate plate to realize sealing, but at the moment, the inflow channel and the outflow channel are communicated through the communication hole due to the effect of the communication hole in the second gate plate, so that the opening of the flow channel is realized.

The utility model discloses further set up to: the flashboard is located second flashboard below and is provided with the third flashboard, the third flashboard runs through the valve body down, and the position that runs through that the valve body is located the third flashboard is provided with the direction perisporium with the big or small looks adaptation of third flashboard peripheral shape, the valve body is located and is provided with the sealing washer between direction perisporium and the third flashboard, the valve body is located the fixed location portion that is provided with in sealing washer upper end, the valve body is located the sealing washer lower extreme and is provided with down location portion, location portion slides along vertical direction and sets up in the third flashboard periphery down, and is provided with the extrusion piece of extrusion sealing washer lower surface towards the sealing washer, location portion.

By adopting the technical scheme, 1, when the first gate plate is positioned in the middle runner, under the action of the pressure of incoming flow, the gate plate is bent to a certain degree and is bent towards the flowing direction of the fluid medium, so that the position of the valve seat is tilted, the sealing effectiveness is influenced, and the third gate plate is arranged, so that the third gate plate penetrates out of the position of the valve body to be limited with the valve body, the position of the third gate plate is limited along the flowing direction of the fluid medium, the bending degree of the first gate plate can be reduced, and the influence on the sealing effectiveness is reduced; 2. in addition, the arrangement side of the sealing ring realizes the sealing of the penetrating position, and prevents fluid medium from entering the leakage-proof cavity from the communicating hole and leaking at the penetrating position in the opening and closing processes of the flow channel; 3. go up this realization of location portion and lower location portion and to the effective extrusion of sealing washer for the sealing washer can be effectual sealed wear out the position in third flashboard, makes sealed more effective.

The utility model discloses further set up to: the valve body is located leak protection chamber bottom and is provided with the elastic metal board, the quantity of elastic metal board is two, and is located the both sides that the third flashboard is located the runner direction respectively, each the one end of elastic metal board is fixed in the valve body, and the other end supports in the surface of the third flashboard of corresponding side, each the elastic metal board is the bending state, and the direction of resetting is towards the direction of the surperficial extrusion of third flashboard.

Through adopting above-mentioned technical scheme, to the fluid medium that contains a solid particle, under the circumstances that the runner was closed, the solid particle will deposit in leak protection chamber bottom, and in going into the clearance of third flashboard and valve body, consequently will carry out wearing and tearing destruction to the sealing washer at the in-process of opening and close and make the valve body leak, in order to reduce the wearing and tearing of solid particle to the sealing washer, set up the elasticity metal sheet in the both sides of third flashboard along the runner direction, through the bending of elasticity metal sheet, effectively support against the third flashboard surface, consequently, the solid particle will be along the surperficial landing of elasticity metal sheet in the sedimentation process, and can't get into the clearance between third flashboard and the valve body, thereby protected the sealing washer.

The utility model discloses further set up to: the lateral wall that the valve body is located leak-proof chamber bottom runs through there is the hole of slagging tap, the outside of valve body is located the hole position of slagging tap and is provided with the valve of slagging tap.

Through adopting above-mentioned technical scheme, under the condition of long-term use, a large amount of solid particles will be piled up in the leak protection intracavity, consequently set up the slag hole and be used for discharging the solid can to control through the valve of slagging tap and open and close, prevent to cause the leakage because of the slag hole.

The utility model discloses further set up to: lower location portion offers along third flashboard periphery circumference and is used for the first oil filler point to third flashboard surface additional lubrication oil, first oil filler point is located down location portion surface and is provided with the oiling mouth, location portion is provided with a plurality of second oil filler points along the equidistant range of third flashboard circumference down, each second oil filler point one end and first oil filler point intercommunication, and the other end runs through location portion down towards the surface of third flashboard.

By adopting the technical scheme, 1. the third flashboard has the problems of corrosion, gluing with a sealing ring and the like due to long-term use, and in order to effectively and conveniently treat the third flashboard under the condition, the first oil hole and the second oil hole are arranged to lubricate the surface of the third flashboard, so that the third flashboard slides on the sealing ring more stably and smoothly, and the service life is prolonged; 2. the second oil filler holes are arranged at equal intervals along the periphery of the third flashboard, so that the lubricant on the surface of the third flashboard is added more uniformly, and the sliding smoothness and the lubricant adding rationality are further enhanced.

The utility model discloses further set up to: a first spring is arranged between the valve body and the valve seat on the side of the inflow channel, the first spring is in a compression state, and the reset direction is the same as the extrusion direction of the valve seat on the side of the inflow channel towards the flashboard.

Through adopting above-mentioned technical scheme, the setting of first spring for realize the elastic compensation sealed with the disk seat of inflow channel side under the effect of first spring, increase sealed validity.

The utility model discloses further set up to: the valve seat that the valve body is located the outflowing channel side deviates from the flashboard side and is provided with the disk seat that will outflowing the channel side towards the extruded extrusion apron of flashboard, the extrusion apron slides along the flow direction and sets up in the valve body, the extrusion apron passes through second bolt fixed connection in the valve body.

Through adopting above-mentioned technical scheme, the setting of extrusion apron will flow out the effectual extrusion of disk seat of flow path side in the flashboard, and the accessible is adjusted the second bolt and is realized the sealed inseparable degree that the disk seat acted on the flashboard, and the first spring that the cooperation played the compensatory action realizes rationally sealed.

The utility model discloses further set up to: the second spring is arranged between the extrusion cover plate and the valve seat on the outflow channel side, the second spring is in a compression state, and the reset direction is the same as the extrusion direction of the valve seat on the outflow channel side towards the flashboard.

Through adopting above-mentioned technical scheme, the second spring has realized that the disk seat of the outflowing flow side is sealed with the elastic compensation of flashboard, makes sealed reasonable efficiency more, and cooperation first spring, extrusion apron make sealed elastic adjustment scope more extensive, and sealed more effective.

The invention is further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a front view of an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of an embodiment of the present invention;

FIG. 4 is an enlarged view of A in FIG. 3;

FIG. 5 is an enlarged view of a portion of an embodiment of the present invention;

FIG. 6 is an enlarged view of B in FIG. 1;

fig. 7 is an enlarged view of C in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-3, the utility model discloses a knife gate valve, which comprises a valve body 1, a gate plate 2 and a controller 3, wherein the gate plate 2 is installed in the valve body 1, a flow passage 11 closed or opened by the gate plate 2 is arranged in the valve body 1, the flow passage 11 comprises a flow inlet passage 111, a flow outlet passage 113 and a middle flow passage 112, the gate plate 2 is slidably arranged in the middle flow passage 112, the flow inlet passage 111 and the flow outlet passage 113 are respectively arranged at two sides of the gate plate 2, a valve seat 4 hermetically matched with the gate plate 2 is arranged in the flow passage 11, the valve seat 4 matched with the gate plate 2 at the flow inlet passage 111 side and the valve seat 4 matched with the gate plate 2 at the flow outlet passage 113 side are included, the controller 3 is arranged in linkage with the gate plate 2, the valve comprises a cylinder 31 fixedly connected to the outer side of the valve body 1 through bolts and the gate plate 2 connected in the flow passage, the gate plate 2 includes a first gate plate 21 and a second gate plate 22, the first gate plate 21 and the second gate plate 22 are integrally formed, and the first gate plate 21 is located above the second gate plate 22, in addition, the first gate plate 21 is in a solid plate shape, and the second gate plate 22 is provided with a communication hole 221 along the direction of the flow channel 11 in a penetrating manner, so that when the cylinder 31 drives the valve rod 32 to move upwards, the second gate plate 22 moves towards and enters the middle flow channel 112, and the communication hole 221 communicates the inflow channel 111 and the outflow channel 113, so that the flow channel 11 is opened, and when the cylinder 31 drives the valve rod 32 to move downwards, the first gate plate 21 moves downwards and enters the middle flow channel 112, so that the first gate plate 21 blocks the inflow channel 111 and the outflow channel 113, so that the flow channel 11 is closed. In addition, because the communicating hole 221 on the second gate plate 22 will be located at the inner ring side and the outer ring side of the position below the valve seat 4 in the opening and closing process to communicate the inside and the outside, in order to prevent the leakage in the process, the leak-proof section 12 is integrally formed below the middle runner 112 on the valve body 1, the leak-proof cavity 121 matched with the shape and the size of the second gate plate 22 is formed in the leak-proof section 12, and the leak-proof cavity 121 and the middle runner 112 are communicated with each other, therefore, when the runner 11 is in the closed state, the second gate plate 22 retreats into the leak-proof cavity 121, and the fluid medium cannot leak through the leak-proof section 12, and in addition, when the runner 11 needs to be opened, only the second gate plate 22 needs to be moved towards the middle runner 112.

As shown in fig. 3-4 and 6, the gate plate 2 in this embodiment is integrally provided with a third gate plate 23 below the second gate plate 22, wherein the third gate plate 23 penetrates the valve body 1 downward, and a guide peripheral wall 122 adapted to the outer shape and size of the third gate plate 23 is provided at a position where the valve body 1 penetrates the third gate plate 23, so that the third gate plate 23 penetrates and supports against the valve body 1 to reduce the bending deformation of the first gate plate 21 in the flow passage 11, thereby further stabilizing the sealing of the flow passage 11. In addition, the valve body 1 is located between the guide peripheral wall 122 and the third gate plate 23 and is filled with a plurality of sealing rings 5, the valve body 1 is located at the upper end of the sealing ring 5 and is integrally formed with an upper positioning portion 123, the valve body 1 is located at the lower end of the sealing ring 5 and is provided with a lower positioning portion 6, wherein the lower positioning portion 6 is sleeved on the periphery of the third gate plate 23 and is slidably arranged on the periphery of the third gate plate 23 along the vertical direction, and an extrusion block 61 for extruding the lower surface of the sealing ring 5 is integrally formed and extends towards the side of the sealing ring 5, therefore, the sealing ring 5 can be extruded without using the positioning portion 6 according to actual conditions, so that adjustment is performed between the sealing performance and the sliding smoothness of the third gate plate 23, and an optimal scheme is realized, in addition, the lower positioning portion 6 is fixedly.

As shown in fig. 3-4, the valve body 1 in this embodiment is provided with two elastic metal plates 124 at the bottom end of the leakage-proof cavity 121, wherein the elastic metal plates 124 are respectively located at two sides of the third gate plate 23 in the direction of the flow channel 11, one end of each elastic metal plate 124 is far away from the third gate plate 23, and is fixedly connected with the valve body 1 at the end by welding or insertion (preferably, inserted so that the elastic metal plate 124 can be detached and replaced), and gradually approaches the third gate plate 23 toward the other end and gradually extends upward and abuts against the surface of the third gate plate 23 at the corresponding side in a tangential manner, and in addition, each elastic metal plate 124 is in a bent state, and the reset direction is a direction pressing toward the surface of the third gate plate 23. Therefore, the solid particles in the fluid medium that is deposited in the leakage preventing chamber 121 will gradually move away from the third gate plate 23 toward the upper surface side along the elastic metal plate 124, so that the solid particles cannot be caught between the third gate plate 23 and the valve body 1, thereby protecting the seal ring 5.

In addition, the lateral wall that valve body 1 in this embodiment is located leak protection chamber 121 bottom runs through there is slag hole 125, the outside of valve body 1 is located slag hole 125 position and is provided with slag valve 126, wherein slag valve 126 can adopt current valves such as ball valve, medium valve, slag valve 126 communicates through threaded connection or welding mode and slag hole 125, consequently, to the solid particle of deposit in leak protection chamber 121, under slag valve 126 open mode, just can discharge along slag valve 126, can realize convenient regular clearance, further protected sealing washer 5.

As shown in fig. 2-3 and 5-6, in the present embodiment, a first oil injection hole 63 is opened inside the lower positioning portion 6 along the circumferential direction of the outer periphery of the third shutter 23, wherein the first oil injection hole 63 is provided with an oil injection port 631 on the surface of the lower positioning portion 6, and in addition, a plurality of second oil injection holes 64 are arranged in the lower positioning portion 6 at equal intervals along the circumferential direction of the third shutter 23, and one end of each second oil injection hole 64 is communicated with the first oil injection hole 63, and the other end of each second oil injection hole penetrates through the lower positioning portion 6 towards the surface of the third shutter 23. Therefore, by injecting lubricant into the first oil injection hole 63 through the oil injection port 631, the lubricant can be uniformly applied to the periphery of the third gate plate 23 through the second oil injection hole 64, so that the third gate plate 23 can be lubricated, and the up-and-down sliding is smoother.

As shown in fig. 1 to 3 and 7, a first spring 41 is provided between the valve body 1 and the valve seat 4 on the inlet passage 111 side in the present embodiment, wherein the first spring 41 is in a compressed state, and the return direction is the same as the pressing direction of the valve seat 4 on the inlet passage 111 side toward the shutter plate 2. The compensating elastic sealing of the valve seat 4 on the inlet channel 111 side against the shutter plate 2 is achieved by the first spring 41.

In addition, the valve seat 4 of the valve body 1 in the embodiment, which is located on the side of the outlet channel 113 and is away from the shutter 2, is provided with the extrusion cover plate 7, the extrusion cover plate 7 is slidably arranged on the valve body 1 along the direction of the channel 11, and the extrusion cover plate 7 is fixedly connected to the valve body 1 through the second bolt 71. Therefore, different degrees of sealing compression of the valve seat 4 and the shutter 2 can be achieved by compressing the cover plate 7 toward the valve seat 4 or away from the valve seat 4, thereby adjusting between sealing and sliding fluency of the shutter 2.

In addition, a second spring 42 is provided between the pressing cover plate 7 and the valve seat 4 on the outlet 113 side in the present embodiment, wherein the second spring 42 is in a compressed state, and the return direction is the same as the pressing direction of the valve seat 4 on the outlet 113 side toward the shutter 2. A compensating elastic sealing of the valve seat 4 on the flow channel 113 side with the shutter plate 2 is achieved by the second spring 42.

Claims

1. The utility model provides a knife gate valve, includes valve body, flashboard and controller, and the flashboard is installed in the valve body, is provided with the runner that seals or open by the flashboard in the valve body, and the runner includes into flow path, outflow channel and middle runner, and the flashboard slides and sets up in middle runner, and the inflow channel lies in the flashboard both sides respectively with outflow channel, is provided with in the runner with the sealed complex disk seat of flashboard, and the controller sets up with the flashboard linkage, and it is including driving the cylinder that the flashboard reciprocated and connecting the valve rod of cylinder and flashboard, its characterized in: the flashboard is including being used for cutting off into the first flashboard of runner and play runner, the second flashboard that is used for communicateing into the runner and goes out the runner, first flashboard and second flashboard fixed connection, and first flashboard is located second flashboard top, the second flashboard runs through along the runner direction and is provided with the intercommunicating pore, the valve body is located middle runner below and is provided with the leak protection chamber with the big or small looks adaptation of second flashboard shape, leak protection chamber and middle runner communicate each other, works as first flashboard when being located middle runner, the second flashboard is located the leak protection intracavity, and the runner is in the closed condition, works as the second flashboard be located the runner, the runner is in the open mode.

2. The knife gate valve of claim 1, wherein: the flashboard is located second flashboard below and is provided with the third flashboard, the third flashboard runs through the valve body down, and the position that runs through that the valve body is located the third flashboard is provided with the direction perisporium with the big or small looks adaptation of third flashboard peripheral shape, the valve body is located and is provided with the sealing washer between direction perisporium and the third flashboard, the valve body is located the fixed location portion that is provided with in sealing washer upper end, the valve body is located the sealing washer lower extreme and is provided with down location portion, location portion slides along vertical direction and sets up in the third flashboard periphery down, and is provided with the extrusion piece of extrusion sealing washer lower surface towards the sealing washer, location portion.

3. The knife gate valve of claim 2, wherein: the valve body is located leak protection chamber bottom and is provided with the elastic metal board, the quantity of elastic metal board is two, and is located the both sides that the third flashboard is located the runner direction respectively, each the one end of elastic metal board is fixed in the valve body, and the other end supports in the surface of the third flashboard of corresponding side, each the elastic metal board is the bending state, and the direction of resetting is towards the direction of the surperficial extrusion of third flashboard.

4. The knife gate valve of claim 1, wherein: the lateral wall that the valve body is located leak-proof chamber bottom runs through there is the hole of slagging tap, the outside of valve body is located the hole position of slagging tap and is provided with the valve of slagging tap.

5. The knife gate valve of claim 2, wherein: lower location portion offers along third flashboard periphery circumference and is used for the first oil filler point to third flashboard surface additional lubrication oil, first oil filler point is located down location portion surface and is provided with the oiling mouth, location portion is provided with a plurality of second oil filler points along the equidistant range of third flashboard circumference down, each second oil filler point one end and first oil filler point intercommunication, and the other end runs through location portion down towards the surface of third flashboard.

6. The knife gate valve of claim 1, wherein: a first spring is arranged between the valve body and the valve seat on the side of the inflow channel, the first spring is in a compression state, and the reset direction is the same as the extrusion direction of the valve seat on the side of the inflow channel towards the flashboard.

7. The knife gate valve of claim 1, wherein: the valve seat that the valve body is located the outflowing channel side deviates from the flashboard side and is provided with the disk seat that will outflowing the channel side towards the extruded extrusion apron of flashboard, the extrusion apron slides along the flow direction and sets up in the valve body, the extrusion apron passes through second bolt fixed connection in the valve body.

8. The knife gate valve of claim 7, wherein: the second spring is arranged between the extrusion cover plate and the valve seat on the outflow channel side, the second spring is in a compression state, and the reset direction is the same as the extrusion direction of the valve seat on the outflow channel side towards the flashboard.