CN219911807U - Gate valve - Google Patents

Abstract

The utility model relates to the field of valves, in particular to a gate valve, which comprises a valve body, a valve plate, a rubber sleeve, a driving shaft and a sealing element, wherein a circulation cavity and two openings communicated with the circulation cavity are arranged outside the valve body; the valve body is internally provided with two sealing surfaces, the two sealing surfaces gradually approach each other along with the distance from the driving shaft, and the surfaces of the rubber sleeve, which are used for abutting the two sealing surfaces, gradually approach each other along with the distance from the driving shaft; the valve body is provided with two compensation surfaces, and the included angle between the two compensation surfaces is larger than or equal to the included angle between the two sealing surfaces. The included angle between the compensation surfaces is larger than or equal to the included angle between the sealing surfaces, so that the worn part of the rubber sleeve can be compensated based on the continuous movement of the rubber sleeve, the rubber sleeve and the sealing surfaces can be sealed, and the service life of the gate valve is prolonged.

Description

Gate valve

Technical Field

The utility model relates to the field of valves, in particular to a gate valve.

Background

The gate valve mainly comprises a valve body and a valve plate, wherein a circulation cavity for medium circulation is arranged in the valve body, the valve plate is slidably positioned in the circulation cavity, and the valve plate is used for controlling the opening and closing of the gate valve. The movement direction of the valve plate is perpendicular to the fluid direction, and the valve plate is in contact with the valve body to seal. Currently, valve plates are encapsulated in order to reduce wear of the valve plates and improve the sealing properties of the gate valves.

The valve plate after the encapsulation makes the glue to tightly lean against the valve body by utilizing the elasticity of the glue so as to improve the sealing effect, but the movement direction of the valve plate is vertical to the medium flow direction. If the valve plate is required to be sealed between the adhesive attached to the valve plate and the valve body, sliding friction can be generated between the adhesive and the valve body through sliding of the valve plate, and the adhesive can be worn due to frequent opening and closing of the valve plate, so that the service life of the gate valve is influenced.

Disclosure of Invention

In order to improve the service life of the gate valve after encapsulation, the utility model provides a gate valve.

The gate valve provided by the utility model adopts the following technical scheme:

the gate valve comprises a valve body, a valve plate, a rubber sleeve wrapping the periphery of the valve plate, a circulation cavity, two openings communicated with the circulation cavity, a driving shaft and a sealing element, wherein the valve plate is positioned in the circulation cavity; two opposite sealing surfaces are arranged in the valve body, the two sealing surfaces gradually approach each other along with the distance from the driving shaft, the sealing surfaces are used for propping against the rubber sleeve, and the surfaces of the rubber sleeve, which are used for propping against the two sealing surfaces, gradually approach each other along with the distance from the driving shaft; the valve body is also provided with two compensation surfaces, the two compensation surfaces are respectively positioned at the outer sides of the two sealing surfaces and used for propping against the rubber sleeve, and the included angle between the two compensation surfaces is larger than or equal to the included angle between the two sealing surfaces.

Through adopting above-mentioned technical scheme, when drive shaft drive valve plate slides to the gum cover and supports closely the front cover, two openings are not linked together to the circulation chamber, and the gate valve is closed promptly. When the valve plate slides reciprocally to enable the rubber sleeve to be worn, the surfaces based on the two sealing surfaces and the rubber sleeve abutting sealing surface are gradually close to each other along with the fact that the surfaces are far away from the driving shaft, and the included angle between the compensation surfaces is larger than or equal to the included angle between the sealing surfaces, so that when the valve plate continues to be close to the compensation surfaces, the worn part of the rubber sleeve can be compensated based on the continuous movement of the valve plate, the rubber sleeve and the sealing surfaces can still be sealed, and the service life of the gate valve is prolonged.

Preferably, a limiting groove is formed in the outer side of the valve plate, and a limiting block used for being embedded into the limiting groove is formed in an integrated mode of the rubber sleeve.

By adopting the technical scheme, the contact area between the valve plate and the rubber sleeve is increased, so that the bonding strength of the valve plate and the rubber sleeve is improved; meanwhile, the limiting block is limited through the limiting groove, so that the stability of the rubber sleeve is further improved, and the tightness is improved.

Preferably, the two sides of the compensation surfaces, which are close to each other, are fixedly connected with positioning blocks, and grooves are formed on the surfaces of the positioning blocks, which are close to each other.

Through adopting above-mentioned technical scheme, when the medium in the gate valve flows, probably there is some impurity to accumulate in the circulation intracavity, through setting up the recess in order to store the impurity to reduce because impurity and make the sealed inseparable probability between gum cover and the sealed face, in order to improve the leakproofness.

Preferably, the driving shaft is rotatably connected to the valve body, and one end of the driving shaft, which is positioned in the circulation cavity, is in threaded connection with the valve plate.

Through adopting above-mentioned technical scheme, rotate the drive shaft so that the valve plate slides in the circulation chamber, compare in people directly through making the drive shaft slide and drive the valve plate slip, can play fine sealed effect between the screw thread face, and can auto-lock between the screw thread face, the people of being convenient for operate.

Preferably, a rubber block is integrally formed on one side, away from the driving shaft, of the rubber sleeve, and the surface, close to the rubber sleeve, of the positioning block is used for propping against the rubber block.

Through adopting above-mentioned technical scheme, the glue piece has elasticity, supports tight locating piece through the glue piece to make the frictional force increase between the screw face of valve plate and drive shaft, thereby when making the gate valve close, increase the stability of valve plate, and then make two surfaces homoenergetic of gum cover be in the state of supporting closely the front cover, in order to improve the leakproofness.

Preferably, the valve plate comprises a valve shaft and a plate body, the valve shaft is fixedly connected to the plate body, the valve shaft is coaxially provided with a thread groove, the plate body is provided with a storage groove coaxial with the thread groove, and the driving shaft is in threaded connection with the thread groove and is used for extending into the storage groove.

Through adopting above-mentioned technical scheme, the impurity that contains in the medium that flows in the circulation chamber can attach in the screw thread face and the screw thread inslot of drive shaft, along with opening and close of gate valve for impurity on screw thread face and the screw thread inslot can get into the holding vessel as far as possible under drive shaft pivoted drive, reduces impurity and gathers up the probability on screw thread groove and screw thread face, with the dead probability of reduction drive shaft card, in order to improve the life of gate valve, and be convenient for people can rotate the drive shaft rotation.

Preferably, a hand wheel is detachably connected to one end, away from the circulation cavity, of the driving shaft, and the hand wheel is used for driving the driving shaft to rotate when the driving shaft is connected to the hand wheel.

Through adopting above-mentioned technical scheme, drive the drive shaft through the hand wheel and rotate to save strength, thereby be convenient for people's operation. The hand wheel can be detached, and when people do not open and close the gate valve, the hand wheel can be taken down to reduce the occupied volume of the gate valve.

Preferably, the valve body comprises a base and a top seat, the circulation cavity, the opening and the outlet are arranged on the base, the top seat is in threaded connection with the base, and a sealing ring is arranged between the top seat and the base; one end of the driving shaft is positioned in the circulation cavity, the other end of the driving shaft penetrates through the top seat and then extends out of the circulation cavity, and the sealing piece is arranged between the top seat and the driving shaft.

Through adopting above-mentioned technical scheme, through dismantling the footstock to people carry out periodic inspection to valve plate, gum cover in the circulation chamber. Through making base threaded connection in the footstock to people dismantle base and footstock and inspect, with improvement inspection efficiency. The sealing ring is arranged to reduce the loss probability of the medium from the base to the top seat.

Preferably, a threaded hole is formed in the surface, away from the circulation cavity, of the top seat, a through hole communicated with the circulation cavity is coaxially formed in the bottom of the threaded hole, a baffle ring is fixedly connected to the inner wall of the through hole, and the inner diameter of the threaded hole is larger than that of the through hole; the sealing piece comprises an O-shaped ring, a lantern ring and a pressing ring, wherein the lantern ring is made of polytetrafluoroethylene; the driving shaft is coaxially embedded in the inner periphery of the baffle ring, the O-shaped ring is arranged between the inner wall of the through hole and the driving shaft, a first annular groove is formed in the outer periphery of the driving shaft, the groove wall of the first annular groove, which is close to the circulation cavity, is used for abutting against the surface of the baffle plate, which is away from the circulation cavity, the lantern ring is coaxially located in the threaded hole, the pressing ring is coaxially sleeved on the outer periphery of the driving shaft and is in threaded connection with the threaded hole, and the pressing ring abuts against the lantern ring.

Through adopting above-mentioned technical scheme, the baffle ring butt first annular cell wall is spacing with the drive shaft to avoid the drive shaft to stretch into thoroughly stretching into to the circulation intracavity. O type circle, lantern ring seal between drive shaft and the valve body, through the clamping ring in order to improve the stability of lantern ring.

Preferably, a second annular groove is formed in the periphery of the driving shaft, and the pressing ring abuts against the groove wall of the second annular groove, which is away from the through hole.

Through adopting above-mentioned technical scheme, carry out spacingly to the drive shaft through clamping ring and fender ring, and because the lantern ring supports tightly the clamping ring to improve clamping ring threaded connection in the stability of valve body, and then improve the stability of drive shaft.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the included angle between the compensation surfaces is larger than or equal to the included angle between the sealing surfaces, so that the worn part of the rubber sleeve can be compensated based on the continuous movement of the rubber sleeve, the rubber sleeve and the sealing surfaces can be sealed, and the service life of the gate valve is prolonged;

2. the rubber blocks enable threaded connection between the driving shaft and the valve plate to be more stable, so that the probability of shaking of the rubber sleeve based on water flow impact is reduced, impurities are stored through the grooves, and the tightness is improved;

3. threaded connection between footstock and the base is in order to people dismantle it to the people of being convenient for regularly carry out periodic inspection to the gate valve, in order to improve inspection efficiency.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional structure of an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view of an embodiment of the utility model, primarily for illustrating two sealing surfaces.

Reference numerals illustrate: 1. a valve body; 11. a base; 111. a flow-through chamber; 112. an opening; 12. a top base; 121. a seal ring; 122. a threaded hole; 123. a through hole; 124. a baffle ring; 125. sealing surfaces; 126. a compensation surface; 13. a positioning block; 14. a groove; 2. a drive shaft; 21. a first ring groove; 22. sealing grooves; 23. a second ring groove; 24. a clamping block; 25. a stud; 26. a hand wheel; 261. a clamping groove; 3. a valve plate; 31. a plate body; 311. a storage tank; 312. a limit groove; 32. a valve shaft; 321. a thread groove; 4. a rubber sleeve; 41. a limiting block; 42. a glue block; 5. a seal; 51. a compression ring; 511. an abutment groove; 52. a collar; 53. an O-ring.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-3.

Referring to fig. 1 and 2, the embodiment of the utility model discloses a gate plate, which comprises a valve body 1, a driving shaft 2, a valve plate 3 and a rubber sleeve 4 wrapped on the periphery of the valve plate 3, wherein the valve body 1 comprises a base 11 and a top seat 12, the base 11 is provided with a circulation cavity 111 and two openings 112 communicated with the circulation cavity 111, and the two openings 112 are respectively used for medium inflow and medium outflow. The inner wall of the circulation cavity 111 is provided with internal threads, the periphery of the top seat 12 is provided with external threads, one end of the top seat 12 is embedded into the circulation cavity 111 and is in threaded connection with the base 11, a sealing ring 121 is arranged between the inner periphery of the base 11 and the outer periphery of the top seat 12, and the inner periphery and the outer periphery of the sealing ring 121 respectively abut against the top seat 12 and the base 11.

The surface of the top seat 12 facing away from the base 11 is provided with a threaded hole 122, the bottom of the threaded hole 122 is coaxially provided with a through hole 123, and the through hole 123 axially penetrates through the top seat 12 along the self axis to be communicated with the circulation cavity 111. The inner wall of the through hole 123 near the circulation cavity 111 is integrally formed with a baffle ring 124, and the inner diameter of the through hole 123 is smaller than the inner diameter of the threaded hole 122. The periphery of the driving shaft 2 is provided with a first annular groove 21, two sealing grooves 22 and a second annular groove 23 which are sequentially distributed along the axial direction of the driving shaft 2, wherein the first annular groove 21 penetrates the driving shaft 2 along the direction close to the circulation cavity 111, the sealing grooves 22 are coaxial with the driving shaft 2, and the second annular groove 23 penetrates the driving shaft 2 along the direction away from the circulation cavity 111. One end of the driving shaft 2 extends into the circulation cavity 111, and the groove wall of the first annular groove 21, which is close to the circulation cavity 111, is abutted against the surface of the baffle ring 124, which is away from the circulation cavity 111.

The gate valve further comprises a seal 5, the seal 5 comprising a pressure ring 51, a collar 52 and two O-rings 53. The two O-rings 53 are respectively coaxially embedded into the two seal grooves 22, and the inner and outer circumferences of the O-rings 53 respectively abut against the groove walls of the seal grooves 22 and the inner walls of the through holes 123. The lantern ring 52 is made of polytetrafluoroethylene, the lantern ring 52 is coaxially sleeved in the threaded hole 122, the pressing ring 51 is coaxially sleeved on the periphery of the driving shaft 2, the surface, close to the lantern ring 52, of the pressing ring 51 is coaxially provided with an abutting groove 511, the periphery of the pressing ring 51 is connected in the threaded hole 122 in a threaded mode, the surface, close to the lantern ring 52, of the pressing ring 51 abuts against the lantern ring 52, and the bottom of the abutting groove 511 abuts against the groove wall, away from the circulation cavity 111, of the second annular groove 23. To limit the driving shaft 2 by the compression ring 51 and the retainer ring 124 and to improve the sealing property between the driving shaft 2 and the top seat 12 by the O-ring 53 and the collar 52.

The end face of the driving shaft 2, which is away from the circulation cavity 111, is fixedly connected with a clamping block 24, the projection of the clamping block 24 along the axial direction of the driving shaft 2 is square, the surface of the clamping block 24, which is away from the driving shaft 2, is fixedly connected with a stud 25, and the periphery of the stud 25 is provided with threads. The end of the driving shaft 2 far away from the circulation cavity 111 is detachably connected with a hand wheel 26, specifically, the inner circumference of the hand wheel 26 is provided with a clamping groove 261 matched with the clamping block 24, and when the clamping block 24 is embedded into the clamping groove 261, people can conveniently rotate the driving shaft 2 by rotating the hand wheel 26. When one does not need the hand wheel 26, one can directly remove the hand wheel 26. In other embodiments, the outer periphery of the stud 25 is screwed with a nut, and the nut abuts against the end face of the hand wheel 26, so that the hand wheel 26 is limited by the nut and the end face of the driving shaft 2, and when the hand wheel 26 is disassembled, the nut needs to be unscrewed from the stud 25.

The valve plate 3 includes a plate body 31 and a valve shaft 32, the valve shaft 32 is coaxially provided with a thread groove 321, threads are arranged in the thread groove 321, the plate body 31 is fixedly connected with the valve shaft 32, and the plate body 31 is provided with a storage groove 311 coaxial with the thread groove 321. The outer circumference of the end of the driving shaft 2 extending into the circulation cavity 111 is provided with threads and is in threaded connection with the thread groove 321, and the storage groove 311 is used for the driving shaft 2 to extend into. The two surfaces of the plate body 31 along the thickness direction of the plate body are provided with limiting grooves 312, the rubber sleeve 4 is integrally formed with limiting blocks 41 matched with the limiting grooves 312, the contact area of the plate body 31 to the rubber sleeve 4 is increased through the groove walls of the limiting grooves 312, and the limiting blocks 41 are limited through the groove walls of the limiting grooves 312.

Referring to fig. 2 and 3, the base 11 is provided with two sealing surfaces 125 and two compensating surfaces 126, the sealing surfaces 125 are annular, and the compensating surfaces 126 are semi-annular. The two sealing surfaces 125 are respectively located at two sides of the axis of the driving shaft 2, and the sealing surfaces 125 gradually approach to form an included angle towards the driving shaft 2 along with being far away from the driving shaft 2, the two compensating surfaces 126 are respectively located at the outer sides of the two sealing surfaces 125 away from the driving shaft 2, the included angle between the two compensating surfaces 126 is larger than or equal to the included angle between the two sealing surfaces 125, in this embodiment, the included angle between the two compensating surfaces 126 is equal to the included angle between the two sealing surfaces 125, that is, the two compensating surfaces 126 are respectively coplanar with the two sealing surfaces 125; in other embodiments, the angle between the two compensation surfaces 126 is greater than the angle between the two sealing surfaces 125. The two compensating surfaces 126 are integrally formed with the positioning blocks 13 on the sides close to each other, and a groove 14 for storing impurities is formed between the two positioning blocks 13. The rubber sleeve 4 is integrally formed with a rubber block 42 on the surface facing away from the driving shaft 2, and the surface of the rubber block 42 facing away from the driving shaft 2 is used for abutting against the positioning block 13. The sealing surface 125 and the compensating surface 126 are both used to abut against the rubber sleeve 4, and both surfaces of the rubber sleeve 4 used to abut against the sealing surface 125 gradually approach as they are away from the drive shaft 2.

The implementation principle of the gate valve of the embodiment of the utility model is as follows: when the hand wheel 26 is rotated to drive the driving shaft 2 to rotate, the rubber sleeve 4 makes the valve plate 3 slide away from the driving shaft 2 by abutting the sealing surface 125 until the sealing surface 125 completely abuts against the rubber sleeve 4, so that the gate valve is closed. However, when the gate valve is opened and closed frequently, the rubber sleeve 4 can continuously rub against the sealing surface 125, so that the compensating surface 126 is arranged, when the contact position of the rubber sleeve 4 and the sealing surface 125 is worn and cannot be abutted against, the rubber sleeve 4 gradually approaches along with being far away from the driving shaft 2, so that when people drive the rubber sleeve 4 to continuously move towards the compensating surface 126, the compensating surface 126 and the sealing surface 125 are abutted against the rubber sleeve 4 again, the sealing performance is improved, the continuous use of the gate valve is ensured, and the service life of the gate valve is prolonged. Moreover, people can conveniently and regularly overhaul the rubber sleeve 4 and the valve plate 3 by rapidly disassembling the top seat 12 and the base 11 so as to reduce the probability of affecting the tightness of the rubber sleeve 4 due to the accumulation of impurities in the groove 14, thereby being beneficial to the long-term use of the gate valve.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. The utility model provides a gate valve, including valve body (1), valve plate (3) and parcel in valve plate (3) peripheral gum cover (4), valve body (1) are equipped with circulation chamber (111) and two intercommunication opening (112) in circulation chamber (111), valve plate (3) are located circulation chamber (111), its characterized in that: the valve further comprises a driving shaft (2) and a sealing piece (5), one end of the driving shaft (2) is positioned in the circulation cavity (111), the other end of the driving shaft (2) extends out of the circulation cavity (111), the driving shaft (2) is used for driving the valve plate (3) to slide, and the sealing piece (5) is arranged between the driving shaft (2) and the valve body (1); two opposite sealing surfaces (125) are arranged in the valve body (1), the two sealing surfaces (125) gradually approach along with being far away from the driving shaft (2), the sealing surfaces (125) are used for abutting against the rubber sleeve (4), and the surfaces of the rubber sleeve (4) for abutting against the two sealing surfaces (125) gradually approach along with being far away from the driving shaft (2); the valve body (1) is also provided with two compensation surfaces (126), the two compensation surfaces (126) are respectively positioned at the outer sides of the two sealing surfaces (125) and used for propping against the rubber sleeve (4), and the included angle between the two compensation surfaces (126) is larger than or equal to the included angle between the two sealing surfaces (125).

2. A gate valve according to claim 1, characterized in that: the outside of valve plate (3) is equipped with spacing groove (312), gum cover (4) integrated into one piece has stopper (41) that are used for embedding spacing groove (312).

3. A gate valve according to claim 1, characterized in that: one side of each compensation surface (126) close to each other is fixedly connected with a positioning block (13), and the surfaces of the positioning blocks (13) close to each other form grooves (14).

4. A gate valve according to claim 3, characterized in that: the driving shaft (2) is rotatably connected to the valve body (1), and one end of the driving shaft (2) located in the circulation cavity (111) is in threaded connection with the valve plate (3).

5. A gate valve according to claim 4, wherein: one side of the rubber sleeve (4) deviating from the driving shaft (2) is integrally formed with a rubber block (42), and the surface of the positioning block (13) close to the rubber sleeve (4) is used for propping against the rubber block (42).

6. A gate valve according to claim 4, wherein: the valve plate (3) comprises a valve shaft (32) and a plate body (31), the valve shaft (32) is fixedly connected to the plate body (31), a thread groove (321) is coaxially formed in the valve shaft (32), a storage groove (311) coaxial with the thread groove (321) is formed in the plate body (31), and the driving shaft (2) is in threaded connection with the thread groove (321) and used for extending into the storage groove (311).

7. A gate valve according to claim 4, wherein: and one end, far away from the circulation cavity (111), of the driving shaft (2) is detachably connected with a hand wheel (26), and when the driving shaft (2) is connected with the hand wheel (26), the hand wheel (26) is used for driving the driving shaft (2) to rotate.

8. A gate valve according to claim 1, characterized in that: the valve body (1) comprises a base (11) and a top seat (12), the circulation cavity (111) and the opening (112) are formed in the base (11), the top seat (12) is connected to the base (11) in a threaded mode, and a sealing ring (121) is arranged between the top seat (12) and the base (11); one end of the driving shaft (2) is positioned in the circulation cavity (111), the other end of the driving shaft (2) penetrates through the top seat (12) and then extends out of the circulation cavity (111), and the sealing piece (5) is arranged between the top seat (12) and the driving shaft (2).

9. A gate valve as defined in claim 8, wherein: the surface of the top seat (12) deviating from the circulation cavity (111) is provided with a threaded hole (122), the bottom of the threaded hole (122) is coaxially provided with a through hole (123) communicated with the circulation cavity (111), the inner wall of the through hole (123) is fixedly connected with a baffle ring (124), and the inner diameter of the threaded hole (122) is larger than the diameter of the through hole (123); the sealing piece (5) comprises an O-shaped ring (53), a lantern ring (52) and a pressing ring (51), wherein the lantern ring (52) is made of polytetrafluoroethylene; the driving shaft (2) is coaxially embedded in the inner periphery of the baffle ring (124), the O-shaped ring (53) is arranged between the inner wall of the through hole (123) and the driving shaft (2), a first annular groove (21) is arranged on the outer periphery of the driving shaft (2), the groove wall of the first annular groove (21) close to the circulation cavity (111) is used for abutting against the surface of the baffle plate, which is away from the circulation cavity (111), the lantern ring (52) is coaxially arranged in the threaded hole (122), and the pressing ring (51) is coaxially sleeved on the outer periphery of the driving shaft (2) and is in threaded connection with the threaded hole (122), and the pressing ring (51) abuts against the lantern ring (52).

10. A gate valve according to claim 9, wherein: the periphery of the driving shaft (2) is provided with a second annular groove (23), and the pressing ring (51) is abutted against the groove wall of the second annular groove (23) deviating from the through hole (123).