CN217029985U

CN217029985U - Stop valve with good anti-transient pressure capability

Info

Publication number: CN217029985U
Application number: CN202220643717.8U
Authority: CN
Inventors: 康治红; 吴娇娇
Original assignee: Gongnai Valve Co ltd
Current assignee: Gongnai Valve Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-22
Anticipated expiration: 2032-03-22

Abstract

The utility model relates to a stop valve with good transient pressure resistance, which comprises a valve body, wherein a valve cover is covered on the valve body, a flow channel is arranged in the valve body, a valve clack is arranged in the flow channel, a valve rod is fixedly connected onto the valve clack, the valve rod penetrates upwards out of the valve cover, a lifting mechanism for controlling the valve rod to move up and down is connected onto the valve rod, a pressure relief cavity is formed in the valve clack, a pressure relief opening communicated with the pressure relief cavity is formed in the middle of the lower end face of the valve clack, a pressure relief stop block is in clearance fit in the pressure relief cavity and is positioned on the pressure relief opening, a first spring used for downwards abutting against the pressure relief stop block is arranged in the pressure relief cavity, when a medium flows in at high pressure instantly, the medium impacts on the valve clack, a part of the medium enters the pressure relief opening and impacts on the pressure relief stop block and pushes the stop block to press the first spring to move upwards, the pressure relief stop block is beneficial to relieving the pressure of a medium flowing into the pressure relief stop block.

Description

Stop valve with good instantaneous pressure resistance

Technical Field

The utility model relates to the technical field of valves, in particular to a stop valve with good anti-instantaneous pressure capability.

Background

The stop valve, also called stop valve, is a valve which is the most widely used, and is popular because of the small friction between the sealing surfaces in the opening and closing process, the durability, the small opening height, the easy manufacture and the convenient maintenance.

When the stop valve is used, under the condition that medium flows into the stop valve at high pressure in a moment, the stop valve causes very large impact on the valve clack, so that the valve clack and the valve rod are possibly damaged, and the existing stop valve has no capacity of resisting the medium from rushing into the stop valve at high pressure in the moment.

SUMMERY OF THE UTILITY MODEL

The utility model provides the stop valve with good anti-transient pressure capability, thereby prolonging the service life and solving the problems existing in the use process in the prior art.

The technical scheme of the utility model is realized as follows: the utility model provides a stop valve that anti instantaneous ability is good, includes the valve body, the valve body upper cover has closed the valve gap, be equipped with the runner in the valve body, be equipped with the valve clack in the runner, fixedly connected with valve rod on the valve clack, the valve rod upwards penetrates out the valve gap, be connected with on the valve rod and be used for controlling its elevating system that reciprocates, it has the pressure release chamber to open in the valve clack, it has the pressure release mouth that lets in the pressure release intracavity to open on the lower terminal surface middle part of valve clack, pressure release intracavity clearance fit has the pressure release dog, the pressure release dog is located the pressure release mouth, it is used for supporting downwards the first spring of holding on the pressure release dog to be equipped with in the pressure release intracavity.

Preferably, a second pressure relief cavity is formed in the valve rod, a communication hole for communicating the pressure relief cavity with the second pressure relief cavity is formed in the middle of the upper end face of the valve clack, a second pressure relief stop block is in clearance fit in the second pressure relief cavity, and a second spring for downwards abutting the second pressure relief stop block against the communication hole is arranged in the second pressure relief cavity.

Preferably, elevating system includes threaded rod, nut piece and hand wheel, the lower extreme of threaded rod rotates to be connected on the upper end of valve rod, hand wheel fixed connection is on the upper end of threaded rod, threaded rod screw-thread fit is on the nut piece, fixedly connected with support frame on the valve cap, nut piece fixed connection is on the support frame.

Preferably, the upper end fixedly connected with of valve rod is spacing, fixedly connected with spacing slider on the spacing seat, fixedly connected with slide rail on the support frame, spacing slider cooperation sets up on the slide rail.

Preferably, an oil inlet channel is formed in the nut block, the oil inlet channel is communicated between the nut block and the threaded rod and the upper end face of the nut block, and a plug is arranged on the oil inlet channel.

Preferably, a packing is arranged between the valve cover and the valve rod, a packing gland is arranged above the packing, a packing pressing plate is arranged on the packing gland, and the packing pressing plate is fixedly connected to the valve cover through a screw rod.

Preferably, the valve body is coated with a protective lining on the surface of the flow passage.

In conclusion, the beneficial effects of the utility model are as follows:

1. according to the utility model, the pressure relief cavity is formed in the valve clack, the pressure relief stop block is in clearance fit in the pressure relief cavity, when a medium flows in at a high pressure instantly, the medium impacts on the valve clack, a part of the medium enters the pressure relief opening and impacts on the pressure relief stop block, and the pressure relief stop block is pushed to press and hold the first spring to move upwards, so that the pressure relief stop block is beneficial to performing the pressure relief effect on the medium flowing in at the high pressure, the structure of the utility model is protected, and the service life of the utility model is prolonged.

2. When the medium pressure is too high, the medium can impact the second pressure relief stop block through the communicating hole after impacting the pressure relief stop block, and the second pressure relief stop block is pushed to press the second spring to move upwards, so that the pressure relief effect is further realized, and the capability of resisting the medium impact at high pressure in the moment is further improved by the structure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

In the figure: 1. a valve body; 2. a valve cover; 3. a flow channel; 4. a valve clack; 5. a valve stem; 6. a pressure relief cavity; 7. a pressure relief port; 8. a pressure relief stop block; 9. a first spring; 10. a second pressure relief cavity; 11. a communicating hole; 12. a second pressure relief stop; 13. a second spring; 14. a threaded rod; 15. a nut block; 16. a hand wheel; 17. a support frame; 18. a limiting seat; 19. a limiting slide block; 20. a slide rail; 21. an oil inlet channel; 22. a plug; 23. a filler; 24. a packing gland; 25. a packing press plate; 26. the inner liner is protected.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1-2 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 embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

Example (b):

as shown in fig. 1 and fig. 2, the utility model discloses a stop valve with good transient pressure resistance, which comprises a valve body 1, wherein a valve cover 2 is covered on the valve body 1, a flow passage 3 is arranged in the valve body 1, a valve clack 4 is arranged in the flow passage 3, a valve rod 5 is fixedly connected on the valve clack 4, the valve rod 5 upwards penetrates out of the valve cover 2, a lifting mechanism for controlling the valve rod to move up and down is connected on the valve rod 5, a pressure relief cavity 6 is arranged in the valve clack 4, a pressure relief opening 7 communicated into the pressure relief cavity 6 is arranged on the middle part of the lower end face of the valve clack 4, a pressure relief stop dog 8 is in clearance fit in the pressure relief cavity 6, the pressure relief stop dog 8 is positioned on the pressure relief opening 7, a first spring 9 for downwards abutting against the pressure relief stop dog 8 is arranged in the pressure relief cavity 6, when a medium instantly flows into the valve body 1 under high pressure, the medium impacts on the valve clack 4, and a part of the medium enters the pressure relief opening 7, the medium impact on the pressure relief stop block 8 and pushes the pressure relief stop block 8 to press and hold the first spring 9 to move upwards, and the pressure relief stop block 8 is beneficial to relieving the medium flowing in at high pressure, so that the structure of the medium pressure relief valve is protected, and the service life of the medium pressure relief valve is prolonged.

In order to further improve the pressure relief capacity of the utility model, a second pressure relief cavity 10 is formed on the valve rod 5, a communication hole 11 for communicating the pressure relief cavity 6 with the second pressure relief cavity 10 is formed in the middle of the upper end face of the valve clack 4, a second pressure relief stop 12 is in clearance fit in the second pressure relief cavity 10, a second spring 13 for downwardly supporting the second pressure relief stop 12 on the communication hole 11 is arranged in the second pressure relief cavity 10, when the medium pressure is overlarge, the medium can impact the second pressure relief stop 12 through the communication hole 11 after impacting the pressure relief stop 8, and pushes the second pressure relief stop 12 to press the second spring 13 to move upwards, so that the pressure relief effect is further realized, and the capacity of the utility model for resisting the high-pressure inflow of the medium in an instant is further improved.

In the utility model, the lifting mechanism comprises a threaded rod 14, a nut block 15 and a hand wheel 16, the lower end of the threaded rod 14 is rotatably connected to the upper end of the valve rod 5, the hand wheel 16 is fixedly connected to the upper end of the threaded rod 14, the threaded rod 14 is in threaded fit with the nut block 15, a support frame 17 is fixedly connected to the valve cover 2, the nut block 15 is fixedly connected to the support frame 17, and the hand wheel 16 is rotated to drive the threaded rod 14 to rotate, so that the threaded rod 14 drives the valve rod 5 to move up and down when rotating on the nut block 15.

Wherein in order to improve the stability and the structural strength of valve rod 5 when reciprocating, the upper end fixedly connected with of valve rod 5 is spacing seat 18, fixedly connected with limiting slide 19 on spacing seat 18, fixedly connected with slide rail 20 on the support frame 17, limiting slide 19 cooperation sets up on slide rail 20.

In order to improve the smoothness of the threaded rod 14 when rotating relative to the nut block 15, an oil inlet channel 21 is arranged on the nut block 15, the oil inlet channel 21 is communicated with the position between the nut block 15 and the threaded rod 14 and the upper end face of the nut block 15, lubricating oil can be introduced between the nut block 15 and the threaded rod 14 through the oil inlet channel 21, and a plug 22 is arranged on the oil inlet channel 21.

In order to improve the sealing performance between the nut block 15 and the threaded rod 14, a packing 23 is arranged between the valve cover 2 and the valve rod 5, a packing gland 24 is arranged above the packing 23, a packing pressing plate 25 is arranged on the packing gland 24, and the packing pressing plate 25 is fixedly connected to the valve cover 2 through a screw.

In addition, in order to surface the surface of the flow channel 3 and prevent severe wear and corrosion due to long-term medium scouring, the valve body 1 is covered with a protective lining 26 on the surface of the flow channel 3.

Also, the terms of the present invention are to be pointed out, such as: the terms "front," "back," "vertical," "horizontal," and the like, as used herein, are intended to refer to an orientation or positional relationship as shown in the drawings for convenience in describing the utility model and in order to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the scope of the utility model.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a stop valve that anti instantaneous ability is good, includes valve body (1), valve body (1) upper cover has closed valve gap (2), be equipped with runner (3) in valve body (1), be equipped with valve clack (4) in runner (3), fixedly connected with valve rod (5) on valve clack (4), valve rod (5) upwards penetrate out valve gap (2), its characterized in that: be connected with on valve rod (5) and be used for controlling its elevating system that reciprocates, it has pressure release chamber (6) to open in valve clack (4), it has pressure release mouth (7) that let in pressure release chamber (6) to open on the lower terminal surface middle part of valve clack (4), clearance fit has pressure release dog (8) in pressure release chamber (6), pressure release dog (8) are located pressure release mouth (7), be equipped with in pressure release chamber (6) and be used for supporting first spring (9) on pressure release dog (8) downwards.

2. The stop valve with good transient pressure resistance as claimed in claim 1, wherein: the valve is characterized in that a second pressure relief cavity (10) is formed in the valve rod (5), a communicating hole (11) for communicating the pressure relief cavity (6) with the second pressure relief cavity (10) is formed in the middle of the upper end face of the valve clack (4), a second pressure relief stop block (12) is arranged in the second pressure relief cavity (10) in a clearance fit mode, and a second spring (13) used for downwards abutting the second pressure relief stop block (12) on the communicating hole (11) is arranged in the second pressure relief cavity (10).

3. The stop valve with good transient pressure resistance as claimed in claim 1, wherein: elevating system is including threaded rod (14), nut piece (15) and hand wheel (16), the lower extreme of threaded rod (14) is rotated and is connected on the upper end of valve rod (5), hand wheel (16) fixed connection is on the upper end of threaded rod (14), threaded rod (14) screw-thread fit is on nut piece (15), fixedly connected with support frame (17) is gone up in valve gap (2), nut piece (15) fixed connection is on support frame (17).

4. The stop valve with good transient pressure resistance as claimed in claim 3, wherein: the upper end fixedly connected with of valve rod (5) is spacing seat (18), fixedly connected with stop block (19) on spacing seat (18), fixedly connected with slide rail (20) is gone up in support frame (17), stop block (19) cooperation sets up on slide rail (20).

5. The stop valve with good transient pressure resistance as claimed in claim 3, wherein: the nut block (15) is provided with an oil inlet channel (21), the upper end face of the oil inlet channel (21) to the nut block (15) is communicated between the nut block (15) and the threaded rod (14), and the oil inlet channel (21) is provided with a plug (22).

6. The stop valve with good transient pressure resistance as claimed in claim 1, wherein: be equipped with packing (23) between valve gap (2) and valve rod (5), packing (23) top is equipped with gland (24), be equipped with packing clamp plate (25) on gland (24), packing clamp plate (25) pass through screw rod fixed connection on valve gap (2).

7. The stop valve with good transient pressure resistance as claimed in claim 1, wherein: the valve body (1) is coated with a protective lining (26) on the surface of the flow passage (3).