CN214197411U

CN214197411U - Regulation type slowly-closing check valve

Info

Publication number: CN214197411U
Application number: CN202120117762.5U
Authority: CN
Inventors: 余金贤; 李璋喜; 叶云
Original assignee: Yonglong Valve Co ltd
Current assignee: Yonglong Valve Co ltd
Priority date: 2021-01-15
Filing date: 2021-01-15
Publication date: 2021-09-14
Anticipated expiration: 2031-01-15

Abstract

The utility model discloses a regulating type slow-closing check valve, which comprises a valve body, a valve cover, a valve rod, a valve clack, a valve seat, a diaphragm and a pressing plate, wherein the valve cover is arranged at the upper end of the valve body, a guide sleeve is arranged on the valve cover, a first flow passage and a second flow passage are arranged in the valve body, a through opening is arranged between the first flow passage and the second flow passage, and the valve seat is arranged on the through opening; the pressure plate, the diaphragm and the valve clack are sequentially arranged on the valve rod along the axial direction, the middle part of the diaphragm is clamped between the pressure plate and the valve clack, the edge of the diaphragm is clamped between the valve cover and the valve body, and the upper part of the valve rod is provided with a spring; the lower part of valve rod is equipped with the spacing ring that is used for the valve clack spacing, and the upper portion threaded connection of valve rod has gland nut and adjusting nut, and gland nut supports the upper end at the clamp plate, is equipped with the backup pad between adjusting nut and the spring, and the one end of spring supports in the backup pad, and the other end of spring supports on the interior terminal surface of valve gap. The utility model discloses can need not frequently to change the spring according to the pretightning force of water pressure adjusting spring self, it is very convenient to use.

Description

Regulation type slowly-closing check valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to a regulation type slowly closes formula check valve.

Background

The check valve is also called check valve and one-way valve, is used in pipeline system and is opened and closed automatically by the force produced by medium flowing in pipeline. According to the difference of structural design, can be divided into the check valve of the lift type, swing check valve and butterfly check valve, the check valve that the lift type check valve, the valve clack slides along the vertical center line of valve body, the lift type check valve can only be installed on horizontal pipeline, the valve clack can adopt the ball on the high-pressure small-bore check valve, the valve body shape of the lift type check valve is the same as stop valve, therefore its fluid resistance coefficient is bigger, its structure is similar to stop valve, valve body and valve clack are the same as stop valve, valve clack upper portion and valve bonnet inferior part process have guide sleeve simple, the valve clack guides the simple free lift in the valve cup guides the simple, when the medium is downstream, the valve clack is opened by the thrust of the medium, when the medium stops flowing, the valve clack depends on self gravity to drop on the disk seat, play and prevent the function of the medium against current.

The existing check valve is provided with a buffer device on the valve clack for avoiding water hammer, the buffer device is a spring usually, when the check valve is used, the spring with corresponding specification is required to be selected according to the water pressure environment, when the water pressure changes, the springs with different specifications are required to be replaced, and the check valve has the defect of inconvenient use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a slow closed check valve of regulation type, the utility model discloses can need not frequently to change the spring according to the pretightning force of water pressure adjusting spring self, it is very convenient to use.

In order to achieve the above object, the utility model provides a following technical scheme: the adjusting type slow-closing check valve comprises a valve body, a valve cover, a valve rod, a valve clack, a valve seat, a diaphragm and a pressing plate, wherein the valve cover is arranged at the upper end of the valve body, a guide sleeve for the valve rod to penetrate through is arranged on the valve cover, a first flow passage and a second flow passage are arranged in the valve body, a through opening is formed between the first flow passage and the second flow passage, and the valve seat is arranged on the through opening; the pressure plate, the diaphragm and the valve clack are sequentially arranged on the valve rod along the axial direction, the middle part of the diaphragm is clamped between the pressure plate and the valve clack, the edge of the diaphragm is clamped between the valve cover and the valve body, and the upper part of the valve rod is provided with a spring acting on the valve rod along the axial direction; the pressure plate, the diaphragm and the valve clack are all sleeved on the periphery of the valve rod, a limiting ring used for limiting the valve clack is arranged on the lower portion of the valve rod, a compression nut and an adjusting nut are connected to the upper portion of the valve rod in a threaded mode, the compression nut abuts against the upper end of the pressure plate, a supporting plate is arranged between the adjusting nut and the spring, one end of the spring abuts against the supporting plate, and the other end of the spring abuts against the inner end face of the valve cover.

Through adopting above-mentioned technical scheme, utilize the clamp plate to compress tightly the diaphragm after on the valve clack, utilize gland nut to carry out the upstroke to clamp plate, diaphragm and valve clack spacing, again according to the rotatory adjusting nut of work water pressure, adjusting nut orders about the backup pad along circumferential movement to change the compression capacity of spring, and then adjust the pretightning force of spring, can carry out adjusting nut's adaptability adjustment according to the water pressure difference, and then change the pretightning force of spring, consequently need not frequent change spring, it is very convenient to use.

The utility model discloses further set up to, the disk seat includes the water conservancy diversion body, and the water conservancy diversion body runs through the mouth, and the upper end of water conservancy diversion body is equipped with to the periphery extend be used for constitute sealed complex sealing to with the valve clack, the sealing supports in the upper end department of crossing.

Through adopting above-mentioned technical scheme, it is very convenient to install to can guarantee the leakproofness between disk seat and the mouth of crossing.

The utility model discloses further set up to, the outer wall of water conservancy diversion body and the inner wall screw-thread fit of crossing.

Through adopting above-mentioned technical scheme, after the water conservancy diversion body of screwing, sealing and mouthful upper port department can form extrusion fit to show the leakproofness that promotes between the two.

The utility model discloses further set up to, the disk seat middle part is equipped with the guiding disc, and the guiding disc center is equipped with the guiding hole that supplies the valve rod lower extreme to pass, still is equipped with a plurality of water conservancy diversion holes that are circumference array evenly distributed on the guiding disc.

Through adopting above-mentioned technical scheme, can show the stability that promotes the valve rod motion, produce when avoiding its motion and rock.

The utility model discloses further set up to, the upper end of crossing install with the sealing part constitutes sealed complex sealed pad.

Through adopting above-mentioned technical scheme, can further promote the leakproofness between mouth up end and the sealing.

The utility model discloses further set up to, it has the filter disc to go back threaded connection on the inner wall of water conservancy diversion body, and the filter disc middle part is equipped with the filtration mouth, installs the filter cloth in the filtration mouth.

Through adopting above-mentioned technical scheme, can filter the fluid, clear away large granule impurity in the fluid, avoid it to valve operation production damage.

The utility model discloses further set up to, the lower terminal surface of filter disc evenly is provided with a plurality of pushing away the handle along circumference, push away and filter disc welded fit.

Through adopting above-mentioned technical scheme, can provide the impetus for operating personnel, the operating personnel of being convenient for dismantles and installs the filter disc, does benefit to the washing of filter screen on the later stage filter disc.

The utility model discloses further set up to, the valve clack lower extreme is installed and is constituted sealed complex thread sealing circle with the valve rod.

Through adopting above-mentioned technical scheme, can promote the leakproofness between valve clack and the valve rod, avoid the medium to reveal from the clearance between the two.

Drawings

Fig. 1 is a schematic overall structure diagram of the present invention;

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

In the figure: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a valve flap; 5. a valve seat; 6. a membrane; 7. pressing a plate; 8. a guide sleeve; 9. a first flow passage; 10. a second flow passage; 11. passing through the opening; 12. a spring; 13. a limiting ring; 14. a compression nut; 15. adjusting the nut; 16. a support plate; 17. a flow guide pipe body; 18. a sealing part; 19. a guide plate; 20. a guide hole; 21. a flow guide hole; 22. a gasket; 23. a filter tray; 24. a filter port; 25. filtering cloth; 26. a push handle; 27. and (4) a threaded seal ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): a regulating type slow-closing check valve is shown in figures 1 and 2, a cover 2 is integrated, a first flow passage 9 and a second flow passage 10 are arranged in a valve body 1, a through opening 11 is arranged between the first flow passage 9 and the second flow passage 10, and a valve seat 5 is installed on the through opening 11; the pressure plate 7, the diaphragm 6 and the valve clack 4 are sequentially arranged on the valve rod 3 along the axial direction, the middle part of the diaphragm 6 is clamped between the pressure plate 7 and the valve clack 4, the edge of the diaphragm 6 is clamped between the valve cover 2 and the valve body 1, and the upper part of the valve rod 3 is provided with a spring 12 acting on the valve rod 3 along the axial direction; the valve rod 3 periphery is all established to clamp plate 7, diaphragm 6 and valve clack 4 cover, the lower part of valve rod 3 is equipped with and is used for the spacing collar 13 of valve clack 4, and spacing collar 13 and valve rod 3 are as an organic whole, the upper portion threaded connection of valve rod 3 has gland nut 14 and adjusting nut 15, and gland nut 14 supports the upper end at clamp plate 7, is equipped with backup pad 16 between adjusting nut 15 and the spring 12, the one end of spring 12 supports on backup pad 16, and the other end of spring 12 supports on the interior terminal surface of valve gap 2. According to the rotatory adjusting nut 15 of operating water pressure, adjusting nut 15 orders about backup pad 16 along circumferential movement to change the compression volume of spring 12, and then adjust the pretightning force of spring 12, can carry out adjusting nut 15's adaptability adjustment according to the water pressure difference, and then change the pretightning force of spring 12.

As shown in fig. 1, the valve seat 5 includes a fluid guiding tube 17, the fluid guiding tube 17 penetrates through the opening 11, a sealing portion 18 extending toward the periphery and forming a sealing fit with the valve flap 4 is disposed at the upper end of the fluid guiding tube 17, the sealing portion 18 and the fluid guiding tube 17 are integrated, and the sealing portion 18 abuts against the upper end of the opening 11. The structure is very convenient to install, and can ensure the sealing property between the valve seat 5 and the through opening 11.

As shown in fig. 1, the outer wall of the guide pipe body 17 is in threaded fit with the inner wall of the through opening 11, and after the guide pipe body 17 is screwed, the sealing part 18 and the upper port of the through opening 11 can form extrusion fit, so that the sealing performance between the guide pipe body 17 and the through opening 11 is remarkably improved.

As shown in fig. 1, a guide disc 19 is disposed in the middle of the valve seat 5, a guide hole 20 for the lower end of the valve rod 3 to pass through is disposed in the center of the guide disc 19, and a plurality of guide holes 21 are disposed on the guide disc 19 and are uniformly distributed in a circumferential array. This design can show the stability that promotes the motion of valve rod 3, produces when avoiding its motion and rocks.

As shown in fig. 1, the upper end of the opening 11 is provided with a sealing gasket 22 which forms a sealing fit with the sealing part 18, and the design can further improve the sealing performance between the upper end surface of the opening 11 and the sealing part 18.

As shown in the attached drawings 1 and 2, the inner wall of the flow guide pipe body 17 is further in threaded connection with a filter disc 23, a filter opening 24 is formed in the middle of the filter disc 23, and filter cloth 25 is installed in the filter opening 24. Meanwhile, a hole can be formed at the bottom of the valve body 1, and a liquid outlet joint is arranged on the hole and used for discharging waste liquid in the first flow channel 9.

As shown in fig. 2, a plurality of push handles 26 are uniformly arranged on the lower end surface of the filter disc 23 along the circumferential direction, and the push handles 26 are in welded fit with the filter disc 23. The push handle 26 can provide an acting point for an operator, so that the operator can conveniently detach and install the filter disc 23, and the cleaning of the filter screen on the filter disc 23 in the later period is facilitated.

As shown in the attached figure 1, the lower end of the valve clack 4 is provided with a thread sealing ring 27 which is in sealing fit with the valve rod 3, and the design can improve the sealing property between the valve clack 4 and the valve rod 3 and avoid the leakage of a medium from a gap between the valve clack 4 and the valve rod 3.

The working principle is as follows: utilize clamp plate 7 to compress tightly diaphragm 6 on valve clack 4 after, utilize gland nut 14 to clamp plate 7, diaphragm 6 and valve clack 4 carry out the upstroke spacing, again according to the rotatory adjusting nut 15 of operating water pressure, adjusting nut 15 orders about backup pad 16 along circumferential movement to change the compression capacity of spring 12, and then adjust spring 12's pretightning force, can carry out adjusting nut 15's adaptability adjustment according to the water pressure difference, and then change spring 12's pretightning force, consequently need not frequently to change spring 12, and it is very convenient to use.

Claims

1. The adjusting type slow-closing check valve comprises a valve body (1), a valve cover (2), a valve rod (3), a valve clack (4), a valve seat (5), a diaphragm (6) and a pressing plate (7), wherein the valve cover (2) is installed at the upper end of the valve body (1), a guide sleeve (8) for the valve rod (3) to penetrate through is arranged on the valve cover (2), a first flow passage (9) and a second flow passage (10) are arranged in the valve body (1), a through opening (11) is arranged between the first flow passage (9) and the second flow passage (10), and the valve seat (5) is installed on the through opening (11); the pressure plate (7), the diaphragm (6) and the valve clack (4) are sequentially arranged on the valve rod (3) along the axial direction, the middle part of the diaphragm (6) is clamped between the pressure plate (7) and the valve clack (4), the edge of the diaphragm (6) is clamped between the valve cover (2) and the valve body (1), and the upper part of the valve rod (3) is provided with a spring (12) acting on the valve rod (3) along the axial direction; the method is characterized in that: the valve rod (3) periphery is all established to clamp plate (7), diaphragm (6) and valve clack (4), the lower part of valve rod (3) is equipped with and is used for spacing collar (13) of valve clack (4), the upper portion threaded connection of valve rod (3) has gland nut (14) and adjusting nut (15), and gland nut (14) support the upper end at clamp plate (7), is equipped with backup pad (16) between adjusting nut (15) and spring (12), the one end of spring (12) supports on backup pad (16), and the other end of spring (12) supports on the interior terminal surface of valve gap (2).

2. The regulated slow-closing check valve of claim 1, wherein: the valve seat (5) comprises a flow guide pipe body (17), the flow guide pipe body (17) penetrates through the opening (11), a sealing part (18) which extends towards the periphery and is used for forming sealing fit with the valve clack (4) is arranged at the upper end of the flow guide pipe body (17), and the sealing part (18) abuts against the upper end opening of the opening (11).

3. The modulating slow-closing check valve of claim 2, wherein: the outer wall of the flow guide pipe body (17) is in threaded fit with the inner wall of the through opening (11).

4. The modulating slow-closing check valve of claim 2, wherein: the valve seat is characterized in that a guide disc (19) is arranged in the middle of the valve seat (5), a guide hole (20) for the lower end of the valve rod (3) to penetrate is formed in the center of the guide disc (19), and a plurality of guide holes (21) which are evenly distributed in a circumferential array are formed in the guide disc (19).

5. The modulating slow-closing check valve of claim 2, wherein: and a sealing gasket (22) which is in sealing fit with the sealing part (18) is arranged at the upper end of the through opening (11).

6. The modulating slow-closing check valve of claim 2, wherein: the inner wall of the flow guide pipe body (17) is further connected with a filter disc (23) in a threaded mode, a filter opening (24) is formed in the middle of the filter disc (23), and filter cloth (25) is installed in the filter opening (24).

7. The regulated slow-closing check valve of claim 6, wherein: the lower end face of the filter disc (23) is uniformly provided with a plurality of push handles (26) along the circumferential direction, and the push handles (26) are in welded fit with the filter disc (23).

8. The regulated slow-closing check valve of claim 1, wherein: and a thread sealing ring (27) which is in sealing fit with the valve rod (3) is arranged at the lower end of the valve clack (4).