CN115479137A

CN115479137A - Gate valve with function of reducing pressure difference between two sides of valve plate

Info

Publication number: CN115479137A
Application number: CN202211062944.2A
Authority: CN
Inventors: 刘灯; 林继承; 刘奇
Original assignee: Huafeng Valve Zhejiang Co ltd
Current assignee: Huafeng Valve Zhejiang Co ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2022-12-16

Abstract

The invention discloses a gate valve with a function of reducing pressure difference between two sides of a valve plate, which comprises a first pipeline, wherein the first pipeline is connected with a second pipeline through a bolt, a sealing box is arranged on the outer wall of the lower end of the second pipeline, a threaded sleeve is fixedly arranged at the upper end of the first pipeline, a threaded column is connected in the threaded sleeve in a threaded mode, a first handle is arranged at the upper end of the threaded column, and a first pressure relief mechanism is arranged in the first pipeline and the second pipeline. According to the invention, the pressure in the liquid of one of the third pipelines can be discharged before the first body and the second body are lifted in a high-pressure or low-pressure environment, so that the pressures in the two third pipelines are leveled, the difficulty of opening the flashboard due to the fact that the pressures on the two sides of the valve plate are different can be avoided, the driving force for opening the first body and the second body is reduced, the labor intensity of workers is reduced, the use convenience of the device is improved, and the practicability of the device is further improved.

Description

Gate valve with function of reducing pressure difference between two sides of valve plate

Technical Field

The invention relates to the technical field of gate valves, in particular to a gate valve with a function of reducing pressure difference between two sides of a valve plate.

Background

The gate valve is a shutter, the movement direction of the shutter is vertical to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate has two sealing surfaces, and the two sealing surfaces of the gate valve in the most common mode form a wedge shape and a wedge angle which are different along with the parameters of the valve. The gate valve is sealed by the contact of a valve seat and a gate plate, usually, a sealing surface is subjected to surfacing welding of metal materials to increase the wear resistance, such as surfacing welding of 1Cr13, STL6, stainless steel and the like, the gate plate is provided with a rigid gate plate and an elastic gate plate, the gate valve is divided into the rigid gate valve and the elastic gate valve according to the difference of the gate plates, and the gate plate of the wedge-type gate valve can be made into a whole, namely the rigid gate plate; the gate plate can also be made into a gate plate capable of generating micro deformation so as to improve the manufacturability of the gate plate and compensate the deviation of the angle of the sealing surface in the machining process, and the gate plate is called an elastic gate plate.

The gate plate of the gate valve moves linearly along with the valve rod, and is called a lifting rod gate valve and a rising rod gate valve. Usually, the lifting rod is provided with trapezoidal threads, and the rotating motion is changed into the linear motion, namely the operation torque is changed into the operation thrust force through a nut at the top end of the valve and a guide groove on the valve body.

However, when the gate valve is used, the hand wheel is usually rotated to enable the gate plate to move downwards through the threaded rod, so that opening and closing of a pipeline are controlled, after the gate valve is closed, the pressure of the pipeline on one side of the gate plate is smaller due to medium discharge, and the pressure of the pipeline on the other side of the gate plate is unchanged, so that the pressures on two sides of the gate plate are different, the opening difficulty of the gate plate is increased, the pressure difference becomes larger under a high-pressure environment, the driving force required by opening or closing the valve is very large, and the opening or closing of the gate plate is very difficult, so that the gate valve with the function of reducing the pressure difference between two sides of the valve plate is provided for solving the problems.

Disclosure of Invention

The present invention is directed to a gate valve with a function of reducing pressure difference between two sides of a valve plate, so as to solve the problems mentioned above in the background art.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a gate valve with reduce valve plate pressure differential function in both sides, includes first pipeline, first pipeline has the second pipeline through bolted connection, be equipped with the seal box on the lower extreme outer wall of second pipeline, the fixed thread bush that is equipped with in upper end of first pipeline, threaded connection has the screw thread post in the thread bush, the upper end of screw thread post is equipped with the first in command, be equipped with first pressure release mechanism in first pipeline and the second pipeline, the both sides of second pipeline are connected with the third pipeline of two symmetric distributions through fastening device.

In a preferred embodiment: the first pressure relief mechanism comprises a rotary joint connected with the lower end of a threaded column, the lower end of the rotary joint is connected with a first connecting column, a first connecting block is connected onto the outer wall of the first connecting column, a first body is fixedly connected with the lower end of the first connecting block, a first sealing rubber block is arranged on the outer wall of the first body, two first through holes which are symmetrically distributed are formed in the wall body of the first body, cavities are formed in the threaded column, a first handle and the first connecting column, a bearing is arranged on the inner wall of each cavity, a ball screw is arranged on the inner wall of the bearing, a nut is connected onto the outer wall of the ball screw in a threaded mode, two second connecting columns which are symmetrically distributed are fixedly connected with the lower end of the nut, a second connecting block is fixedly connected with the lower end of the second connecting column, a second body is fixedly connected with the lower end of the second connecting block, the second body is slidably arranged in the first body, a second through hole is formed in the second body, a second handle is arranged at the upper end of the ball screw, and a second pressure relief mechanism is arranged in the box.

In a preferred embodiment: fastening device includes the first card post with second pipeline and third pipeline swing joint, be equipped with the arc bayonet socket that a plurality of equidistance distribute on the second pipeline, it is a plurality of all be equipped with first limiting plate in the arc bayonet socket, sliding connection has the slide of two symmetric distributions on the inner wall of first card post, the one end fixedly connected with second card post of slide, the upper end of second card post is equipped with the lug, one side fixedly connected with second limiting plate of lug, the first spring of one end fixedly connected with of slide, the one end and the first card post inner wall fixed connection of first spring, all be equipped with first opening on the wall body of first card post, second limiting plate and second card post all with first opening swing joint, one of them be equipped with filtering mechanism on the third pipeline.

In a preferred embodiment: the filter mechanism comprises a filter plate arranged on the inner wall of one side of the second pipeline, a motor is arranged on the outer wall of the third pipeline, an output shaft at the lower end of the motor is rotatably arranged in one of the third pipelines, a first bevel gear is fixedly connected to the lower end of the output shaft of the motor, a second bevel gear is meshed with the first bevel gear, a rotating shaft is fixedly connected to the inner wall of the second bevel gear, and two symmetrically distributed scraper plates are fixedly connected to one side of the rotating shaft.

In a preferred embodiment: one of them fixedly connected with backup pad on the inner wall of third pipeline, the pivot is rotated with the backup pad and is connected, motor output shaft and one of them be equipped with the sealed rubber block of second between the third pipeline, through the setting of backup pad, increased pivot and scraper blade pivoted steadiness.

In a preferred embodiment: the junction of first pipeline and second pipeline is equipped with third sealing rubber piece, and is a plurality of the equal fixedly connected with third handle in one side of first calorie of post, the material of the output shaft of filter plate, motor, first bevel gear, second bevel gear, pivot, backup pad and scraper blade is stainless steel material, through the setting of stainless steel material, can make the life of the output shaft of filter plate, motor, first bevel gear, second bevel gear, pivot, backup pad and scraper blade improve greatly to can avoid leading to the phenomenon of rust because of the corruption of oxidation.

In a preferred embodiment: the second pressure relief mechanism comprises a first water pipe and a second water pipe which are fixedly arranged in the seal box, the upper ends of the first water pipe and the second water pipe are respectively arranged in the two third pipelines, and the force required to be used when the second pipeline is opened is further reduced through the arrangement of the second pressure relief mechanism.

In a preferred embodiment: the first water pipe is communicated with the second water pipe, the sealing plug is arranged in the first water pipe in a sliding mode, the lower end of the sealing plug is arranged outside the first water pipe in a sliding mode, and the first water pipe and the second water pipe are communicated and closed conveniently through the arrangement of the sealing plug.

In a preferred embodiment: the sealing plug is characterized in that a fourth sealing rubber block is arranged on the outer wall of the upper end of the sealing plug, a second spring is arranged between the outer wall of the lower end of the sealing plug and the first water pipe, the lower end of the sealing plug is fixedly connected with a press plate, and the sealing performance of the sealing plug is further improved through the fourth sealing rubber block.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arrangement of the first pressure relief mechanism and the second pressure relief mechanism, the pressure in the liquid of one of the third pipelines can be firstly released before the first body and the second body are lifted in a high-pressure or low-pressure environment, so that the pressures in the two third pipelines are leveled, the difficulty in opening the flashboard caused by the fact that the pressures on the two sides of the valve plate are different can be avoided, the driving force for opening the first body and the second body is reduced, the labor intensity of workers is reduced, the use convenience of the device is improved, the practicability of the device is improved, the position of the moved sealing plug can be conveniently fixed through the arrangement of the pressing plate, the clamping groove and the elastic clamping block, and the communication and closing work between the first water pipe and the second water pipe is further facilitated.

2. The fastening mechanism is arranged, so that the two third pipelines can be conveniently disassembled and assembled, the regular cleaning work of impurities filtered by the filter plate in one of the third pipelines is further facilitated, the convenience of the device in use is further increased, the impurities in the liquid can be filtered by matching with the arrangement of the filter plate, the first body and the second body are prevented from being rubbed by the impurities mixed in the liquid along with the long-term use of the device, the abrasion is further caused, the sealing performance of the device in use is reduced, and the filtering work of the impurities in the liquid in the device is facilitated by the arrangement of the cleaning mechanism, and the filter plate is prevented from being blocked by the impurities when the device is used, so that the filtering effect on the filter plate is influenced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is an overall external structural schematic of the present invention;

FIG. 2 is a schematic overall main sectional structural view of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is an enlarged view of the structure of FIG. 2B of the present invention;

FIG. 5 is an enlarged view of FIG. 2 at C of the present invention;

FIG. 6 is an enlarged view of FIG. 2 at D in accordance with the present invention;

FIG. 7 is a partial right cross-sectional structural view of a left fastening mechanism of a second conduit according to the present invention;

FIG. 8 is a schematic sectional elevational view of the interior of the cavity of the present invention;

FIG. 9 is a front sectional view of the front wall of the seal box of the present invention;

FIG. 10 is an enlarged view of FIG. 9 at E according to the present invention;

in the figure: 1. a first conduit; 2. a bolt; 3. a second conduit; 4. a sealing box; 5. a threaded sleeve; 6. a threaded post; 7. a first handle; 8. a third pipeline; 9. a rotary joint; 10. a first connecting post; 11. a first connection block; 12. a first body; 13. a first sealing rubber block; 14. a first through hole; 15. a cavity; 16. a bearing; 17. a ball screw; 18. a nut; 19. a second connecting column; 20. a second connecting block; 21. a second body; 22. a second through hole; 23. a first clamp post; 24. an arc bayonet; 25. a first limit plate; 26. a slide plate; 27. a second clamping column; 28. a bump; 29. a second limiting plate; 30. a first spring; 31. a first opening; 32. filtering a plate; 33. a motor; 34. a second bevel gear; 35. a squeegee; 36. a support plate; 37. a first water pipe; 38. a second water pipe; 39. a sealing plug; 40. pressing the plate; 41. a second opening; 42. a card slot; 43. an elastic clamping block; 44. a second handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-5 and fig. 8-10, the present invention provides the following technical solutions: a gate valve with the function of reducing pressure difference between two sides of a valve plate comprises a first pipeline 1, the first pipeline 1 is connected with a second pipeline 3 through a bolt 2, a sealing box 4 is arranged on the outer wall of the lower end of the second pipeline 3, a thread sleeve 5 is fixedly arranged at the upper end of the first pipeline 1, a thread column 6 is in threaded connection with the thread sleeve 5, a first handle 7 is arranged at the upper end of the thread column 6, a first pressure relief mechanism is arranged in the first pipeline 1 and the second pipeline 3, two sides of the second pipeline 3 are connected with two third pipelines 8 which are symmetrically distributed through a fastening mechanism, the first pressure relief mechanism comprises a rotary joint 9 connected with the lower end of the thread column 6, the lower end of the rotary joint 9 is connected with a first connecting column 10, a first connecting block 11 is connected onto the outer wall of the first connecting column 10, a first body 12 is fixedly connected with the lower end of the first connecting block 11, a first sealing rubber block 13 is arranged on the outer wall of the first body 12, two first through holes 14 which are symmetrically distributed are arranged on the wall of the first body 12, a screw rod 18 is arranged on the inner wall of the second connecting block 17, a screw rod 17 is connected with a screw rod 17, a screw rod 16 is arranged on the inner wall of the second connecting block 17, a screw rod 16 is connected with a screw rod 17, the sealing box 4 is internally provided with a second pressure relief mechanism, the second pressure relief mechanism comprises a first water pipe 37 and a second water pipe 38 which are fixedly arranged in the sealing box 4, the upper ends of the first water pipe 37 and the second water pipe 38 are respectively arranged in the two third pipelines 8, the force required to be used when the second pipeline 3 is opened is further reduced through the arrangement of the second pressure relief mechanism, the first water pipe 37 is communicated with the second water pipe 38, a sealing plug 39 is arranged in the first water pipe 37 in a sliding manner, the lower end of the sealing plug 39 is arranged outside the first water pipe 37 in a sliding manner, the communication and the closing between the first water pipe 37 and the second water pipe 38 are facilitated through the arrangement of the sealing plug 39, a fourth sealing rubber block is arranged on the outer wall of the upper end of the sealing plug 39, a second spring is arranged between the outer wall of the lower end of the sealing plug 39 and the first water pipe 37, a pressing plate 40 is fixedly connected to the lower end of the sealing plug 39, the pressing plate 40 is further increased in sealing property to the sealing plug 39 through the arrangement of the fourth sealing rubber block, one end of the sealing box 4 is provided with a second clamping block 41, a plurality of clamping grooves 43 which are arranged on the side wall body, and a plurality of clamping block 42 which is convenient to move, and a plurality of clamping block 42 are arranged on the side wall of the side wall body, and a plurality of the clamping block 42 which is arranged at equal distance.

The working principle of the invention is as follows: when the device needs to be opened, the second handle 44 is rotated forward, then the ball screw 17 is driven to rotate forward, the ball screw 17 rotates forward to drive the driving nut 18 to move upward, further the second connecting block 20 is driven to move upward under the action of the two second connecting columns 19, further the second body 21 is driven to slide upward, so that the second through hole 22 is flush with the two first through holes 14, further the liquid on the left side of the second pipeline 3 flows to the right side through the first through hole 14 and the second through hole 22, preliminary pressure relief is carried out on the liquid on the left side of the second pipeline 3, meanwhile, the pressing plate 40 is pressed downward, through the arrangement of the elastic clamping block 43 and the clamping groove 42, the position of the pressing plate 40 after pressing can be fixed, further the position after the movement of the pressing plate 39 is fixed, the sealing plug 39 is driven to slide downward along the inner wall of the first water pipe 37 along with the downward movement of the pressing plate 40, when the sealing plug 39 moves to the lower part of the water inlet at the left side of the second water pipe 38, the liquid at the left side of the second pipeline 3 is poured into the right side of the second pipeline 3 through the first water pipe 37 and the second water pipe 38, the pressure relief effect on the liquid inside the left side of the second pipeline 3 is further increased, the first handle 7 is rotated in the forward direction after the pressure relief is completed, the threaded post 6 is driven to rotate in the forward direction through the threaded sleeve 5, and then the threaded post 6 is driven to move upwards, through the arrangement of the bearing 16, the ball screw 17 cannot rotate and moves upwards along with the threaded post 6, the upward movement of the threaded post 6 drives the first connecting post 10 to move upwards through the rotary joint 9, so that the first body 12 is driven to move upwards through the first connecting block 11, and simultaneously the upward movement of the ball screw 17 drives the second body 21 to move upwards synchronously through the nut 18, the second connecting post 19 and the second connecting block 20, therefore, the second pipeline 3 is completely opened, the transmission work of the liquid is completed, and then when the first body 12 and the second body 21 are required to be utilized to close the second pipeline 3, the first body 12 and the second body 21 can be reset by reversely rotating the first handle 7 and then reversely rotating the second handle 44 in the same way as above, and further the closing work of the second pipeline 3 is completed.

Referring to fig. 1-2 and fig. 6-7, the present invention provides a technical solution: the utility model provides a gate valve with reduce valve plate both sides pressure difference function, fastening device includes the first card post 23 with second pipeline 3 and third pipeline 8 swing joint, be equipped with the arc bayonet socket 24 that a plurality of equidistance distribute on the second pipeline 3, it is a plurality of all be equipped with first limiting plate 25 in the arc bayonet socket 24, sliding connection has two symmetric distribution's slide 26 on the inner wall of first card post 23, the one end fixedly connected with second card post 27 of slide 26, the upper end of second card post 27 is equipped with lug 28, one side fixedly connected with second limiting plate 29 of lug 28, the one end fixedly connected with first spring 30 of slide 26, the one end and the first card post 23 inner wall fixed connection of first spring 30, all be equipped with first opening 31 on the wall body of first card post 23, second limiting plate 29 and second card post 27 all with first opening 31 swing joint, one of the third pipelines 8 is provided with a filtering mechanism, the filtering mechanism comprises a filter plate 32 arranged on the inner wall of one side of the second pipeline 3, the outer wall of the third pipeline 8 is provided with a motor 33, an output shaft at the lower end of the motor 33 is rotatably arranged in one of the third pipelines 8, the lower end of the output shaft of the motor 33 is fixedly connected with a first bevel gear, the first bevel gear is meshed with a second bevel gear 34, the inner wall of the second bevel gear 34 is fixedly connected with a rotating shaft, one side of the rotating shaft is fixedly connected with two symmetrically distributed scrapers 35, the inner wall of one of the third pipelines 8 is fixedly connected with a supporting plate 36, the rotating shaft is rotatably connected with the supporting plate 36, a second sealing rubber block is arranged between the output shaft of the motor 33 and one of the third pipelines 8, and through the arrangement of the supporting plate 36, increased pivot and scraper blade 35 pivoted steadiness, first pipeline 1 is equipped with the third sealing rubber piece with the junction of second pipeline 3, and is a plurality of the equal fixedly connected with third handle in one side of first calorie of post 23, the material of filter plate 32, motor 33's output shaft, first bevel gear, second bevel gear 34, pivot, backup pad 36 and scraper blade 35 is stainless steel material, through the setting of stainless steel material, can make the life of filter plate 32, motor 33's output shaft, first bevel gear, second bevel gear 34, pivot, backup pad 36 and scraper blade 35 improve greatly to can avoid leading to the phenomenon of rust because of the corruption of oxidation.

The working principle of the invention is as follows: during the use, along with opening of second pipeline 3, liquid begins to transmit, and then liquid can be transmitted away after the filtration of filter plate 32 earlier, start motor 33 in liquid transmission, motor 33 lower extreme output shaft drives first bevel gear and rotates, first bevel gear rotates and drives second bevel gear 34 and rotate, and then drive the pivot and rotate on backup pad 36 outer wall, the pivot rotates and drives scraper blade 35 and rotate, and then scrape the clearance to the left surface of filter plate 32, avoid the jam of filter plate 32, at last when liquid no longer is transmitted, when third pipeline 8 and second pipeline 3 are inside no longer has liquid, through third handle reverse rotation first calorie of post 23, and then make first limiting plate 25 and second limiting plate 29 no longer contact, at this moment to one side extract first calorie of post 23, make second calorie of post 27 under the effect of lug 28 in the effect in the first calorie of post 23 of pulling out, then can take out first calorie of post 23, and then can accomplish first calorie of post 23 and third pipeline 8 and second pipeline 3 and then the filter plate 23, and second calorie of post 23 and second pipeline 3 are in the filter plate 23, thereby the second calorie of the filter plate 23 and second pipeline 3 and the second card post 23 can be in the process of the collection of the second pipeline 3 and the second filter plate 23 to accomplish the unified installation, thereby the filter plate 3 and the second filter plate 3 to unify the filter plate 23, and collect the impurity, then when the regular installation, then.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a gate valve with reduce valve plate both sides pressure differential function, includes first pipeline (1), its characterized in that: first pipeline (1) is connected with second pipeline (3) through bolt (2), be equipped with seal box (4) on the lower extreme outer wall of second pipeline (3), the fixed thread bush (5) that is equipped with in upper end of first pipeline (1), thread bush (5) female connection has screw thread post (6), the upper end of screw thread post (6) is equipped with the first in command (7), be equipped with first pressure relief mechanism in first pipeline (1) and second pipeline (3), the both sides of second pipeline (3) are connected with third pipeline (8) of two symmetric distributions through fastening mechanism.

2. The gate valve according to claim 1, wherein the gate valve comprises: the first pressure relief mechanism comprises a rotary joint (9) connected with the lower end of a threaded column (6), the lower end of the rotary joint (9) is connected with a first connecting column (10), the outer wall of the first connecting column (10) is connected with a first connecting block (11), the lower end of the first connecting block (11) is fixedly connected with a first body (12), the outer wall of the first body (12) is provided with a first sealing rubber block (13), the wall body of the first body (12) is provided with two first through holes (14) which are symmetrically distributed, the threaded column (6), a first handle (7) and the first connecting column (10) are internally provided with cavities (15), the inner wall of the cavity (15) is provided with a bearing (16), the inner wall of the bearing (16) is provided with a ball screw rod (17), the outer wall of the ball screw rod (17) is in threaded connection with a nut (18), the lower end of the nut (18) is fixedly connected with two second connecting columns (19) which are symmetrically distributed, the lower end of the second connecting block (19) is fixedly connected with a second connecting block (20), the lower end of the second connecting block (20) is fixedly connected with a second connecting column (21), and the second connecting block (21) is arranged in the second connecting column (21), the upper end of the ball screw (17) is provided with a second handle (44), and a second pressure relief mechanism is arranged in the seal box (4).

3. The gate valve according to claim 1, wherein the gate valve comprises: fastening device includes first calorie of post (23) with second pipeline (3) and third pipeline (8) swing joint, be equipped with arc bayonet socket (24) that a plurality of equidistance distribute on second pipeline (3), it is a plurality of all be equipped with first limiting plate (25) in arc bayonet socket (24), sliding connection has slide (26) of two symmetric distributions on the inner wall of first calorie of post (23), the one end fixedly connected with second card post (27) of slide (26), the upper end of second calorie of post (27) is equipped with lug (28), one side fixedly connected with second limiting plate (29) of lug (28), the first spring (30) of one end fixedly connected with of slide (26), the one end and the first card post (23) inner wall fixed connection of first spring (30), all be equipped with first opening (31) on the wall body of first calorie of post (23), second limiting plate (29) and second card post (27) all with first opening (31) swing joint, one of them be equipped with third pipeline (8) filtering device.

4. The gate valve according to claim 3, wherein the gate valve comprises: filtering mechanism is including locating filter plate (32) on second pipeline (3) one side inner wall, be equipped with motor (33) on third pipeline (8) outer wall, motor (33) lower extreme output shaft rotates and locates in one of them third pipeline (8), the first bevel gear of motor (33) output shaft lower extreme fixedly connected with, first bevel gear meshing is connected with second bevel gear (34), fixedly connected with pivot on the inner wall of second bevel gear (34), scraper blade (35) of two symmetric distributions of one side fixedly connected with of pivot.

5. The gate valve according to claim 4, wherein the gate valve comprises: the inner wall of one of the third pipelines (8) is fixedly connected with a supporting plate (36), the rotating shaft is rotatably connected with the supporting plate (36), and a second sealing rubber block is arranged between the output shaft of the motor (33) and one of the third pipelines (8).

6. The gate valve of claim 5, wherein the gate valve comprises: the joint of the first pipeline (1) and the second pipeline (3) is provided with a third sealing rubber block, a plurality of third handles are fixedly connected to one side of the first clamping columns (23), and the output shaft of the filter plate (32), the output shaft of the motor (33), the first bevel gear, the second bevel gear (34), the rotating shaft, the supporting plate (36) and the scraper (35) are all made of stainless steel materials.

7. The gate valve according to claim 2, wherein the gate valve comprises: the second pressure relief mechanism comprises a first water pipe (37) and a second water pipe (38) which are fixedly arranged in the seal box (4), and the upper ends of the first water pipe (37) and the second water pipe (38) are respectively arranged in the two third pipelines (8).

8. The gate valve according to claim 7, wherein the gate valve comprises: the first water pipe (37) is communicated with the second water pipe (38), a sealing plug (39) is arranged in the first water pipe (37) in a sliding mode, and the lower end of the sealing plug (39) is arranged outside the first water pipe (37) in a sliding mode.

9. The gate valve according to claim 8, wherein the gate valve further comprises: the outer wall of the upper end of the sealing plug (39) is provided with a fourth sealing rubber block, a second spring is arranged between the outer wall of the lower end of the sealing plug (39) and the first water pipe (37), and the lower end of the sealing plug (39) is fixedly connected with a press plate (40).

10. The gate valve of claim 9, wherein the gate valve further comprises: be equipped with second opening (41) on the one end wall body of seal box (4), be equipped with a plurality of equidistance distribution's draw-in groove (42) on the lateral wall of second opening (41), be equipped with on the lateral wall of pressing board (40) with draw-in groove (42) assorted elasticity fixture block (43).