CN214579032U

CN214579032U - Air discharge check valve device

Info

Publication number: CN214579032U
Application number: CN202120808365.2U
Authority: CN
Inventors: 陶力
Original assignee: Hubei High Middle Pressure Valve Co ltd
Current assignee: Hubei High Middle Pressure Valve Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-02
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses an air-exhaust check valve device, include the valve body and pull out the fork, the internally mounted of valve body has valve clack seat, and the top of valve clack seat installs the gland, the valve clack is installed on the right side of gland, and the right side of valve clack installs bush B, the internally mounted of valve clack has valve bush A, and valve bush A's internally mounted has big spring, pull out the fork and install on the right side of big spring, pull out the right side of fork and install the import flange, the internally mounted who pulls out the fork has little spring, and the top of little spring installs little valve clack, the axle sleeve is installed to the below of little spring, and the inboard of axle sleeve installs the packing ring, the connection fork is installed to the top of little valve clack, and the top of connection fork installs the emission dish. The air-discharge check valve device is provided with the small valve clacks and the shifting fork which are connected with each other, and the valve clacks can move left and right according to the change of flow, so that a bypass can be opened or closed, and the backflow of fluid is prevented.

Description

Air discharge check valve device

Technical Field

The utility model relates to a pump protection valve technical field specifically is empty check valve device of arranging.

Background

And the air discharge check valve is mainly used at the outlet of the water pump. When the water supply reaches a certain pressure, the medium pushes the valve core to move away from the valve seat, the idle discharge check valve is opened, and the valve core connecting rod pulls the idle discharge check valve plate to close the exhaust port. When the flow of the water supply pump is reduced, the valve core moves reversely under the action of the spring to generate sealing with the valve seat, and meanwhile, the valve core connecting rod pulls the idle discharge check valve plate to open the discharge port, so that the minimum flow of the water pump is kept. Prevent the water temperature in the pump from rising to generate vaporization and form cavitation. And protecting the feed pump. When the pump is stopped, the valve core moves reversely under the action of the spring to close the valve, so that the water supply system is prevented from being damaged by the high-pressure water hammer.

The existing air-discharge check valve is simple in structure, single in opening and closing mode, large in caliber of a valve under the current working condition, increased in pressure, poor in comprehensive performance in the using process and incapable of meeting the using requirements of the working conditions on site, and technological innovation is performed on the basis of the existing air-discharge check valve device under the above conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an empty check valve device of arranging to propose current empty check valve simple structure among the above-mentioned background of solution, open and the mode of closing is single, and its comprehensive properties is not good enough, the user demand problem of satisfying current operating mode that can not be fine.

In order to achieve the above object, the utility model provides a following technical scheme: the air-laid check valve device comprises a valve body and a shifting fork, wherein a valve clack seat is arranged inside the valve body, a gland is arranged above the valve clack seat, a valve clack is arranged on the right side of the gland, a bushing B is arranged on the right side of the valve clack, a valve bushing A is arranged inside the valve clack, a large spring is arranged inside the valve bushing A, the shifting fork is arranged on the right side of the large spring, an inlet flange is arranged on the right side of the shifting fork, a small spring is arranged inside the shifting fork, a small valve clack is arranged above the small spring, a shaft sleeve is arranged below the small spring, a gasket is arranged inside the shaft sleeve, a connecting fork is arranged above the small valve clack, a discharge disc is arranged above the connecting fork, a connecting flange is arranged above the discharge disc, a compression nut is arranged above the connecting flange, a throttling pore plate A is arranged above the compression nut, and a throttling orifice plate B is arranged above the throttling orifice plate A, a discharge flange is arranged on the outer side of the throttling orifice plate B, and an end cover is arranged above the discharge flange.

Preferably, a sliding structure is formed between the valve clack and the valve body, the small valve clack is in threaded connection with the shifting fork, and a clamping structure is formed between one end of the shifting fork and the valve clack.

Preferably, an elastic structure is formed between the shifting fork and the small spring, an elastic structure is formed between the valve clack and the large spring, and the valve clack forms a sealing structure with the valve body through the valve bushing A.

Preferably, the valve flap forms a sealing structure with the valve body through a bushing B, and the valve flap penetrates through the bushing B.

Preferably, the washers are symmetrically distributed about a horizontal center line of the shaft sleeve, and the shaft sleeve coincides with a vertical center line of the shift fork.

Preferably, a communicating structure is formed between the orifice plate A and the valve body, and a communicating structure is formed between the orifice plate B and the valve body.

Preferably, the end cover is movably connected with the valve body, and the end cover is matched with the valve body.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses be provided with and to slide each other between valve clack and the valve body, little valve clack and pulling out the interconnect between the fork, can be according to the change of flow, make the valve clack produce the removal of left and right sides position, thereby can open or close the bypass, prevent the refluence of fluid, pull out the fork and block each other of valve clack, can guarantee to pull out the stability that fork and valve clack are connected, can carry out the restriction of scope to the removal of pulling out the fork through little spring, big spring can restrict the removal of valve clack, avoided current empty discharge check valve simple structure, open and close the single problem of mode, its comprehensive properties is not good enough;

2. the utility model discloses be provided with bush B and increased the sealing performance between valve clack and the valve body, the packing ring has played fastening and skid-proof effect at the upper and lower both ends of axle sleeve, can increase the compactness of junction simultaneously, has improved the leakproofness, can play the effect of throttle at the inside fluid circulation in-process of valve body through orifice plate A and orifice plate B.

Drawings

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

FIG. 2 is a schematic structural view of the small valve flap of the present invention;

fig. 3 is a schematic cross-sectional structural view of the flip cover of the present invention;

FIG. 4 is a schematic view of a partial enlarged structure at A in FIG. 1 according to the present invention;

fig. 5 is a schematic view of the external structure of the end cap of the present invention.

In the figure: 1. a valve body; 2. a valve flap seat; 3. a gland; 4. a valve flap; 5. a valve bushing A; 6. a large spring; 7. shifting a fork; 8. a small spring; 9. a small valve flap; 10. a connecting fork; 11. a drain pan; 12. a connecting flange; 13. a compression nut; 14. a throttle orifice plate A; 15. a restriction orifice B; 16. a drain flange; 17. a shaft sleeve; 18. a gasket; 19. an inlet flange; 20. a bushing B; 21. and (4) end covers.

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.

Referring to fig. 1-5, the present invention provides a technical solution: the air-exhaust check valve device comprises a valve body 1 and a shifting fork 7, wherein a valve flap seat 2 is arranged inside the valve body 1, a gland 3 is arranged above the valve flap seat 2, a valve flap 4 is arranged on the right side of the gland 3, a bushing B20 is arranged on the right side of the valve flap 4, a valve bushing A5 is arranged inside the valve flap 4, a large spring 6 is arranged inside a valve bushing A5, the shifting fork 7 is arranged on the right side of the large spring 6, an inlet flange 19 is arranged on the right side of the shifting fork 7, a small spring 8 is arranged inside the shifting fork 7, a small valve flap 9 is arranged above the small spring 8, a shaft sleeve 17 is arranged below the small spring 8, a gasket 18 is arranged on the inner side of the shaft sleeve 17, a connecting fork 10 is arranged above the small valve flap 9, a discharge disc 11 is arranged above the connecting fork 10, a connecting flange 12 is arranged above the discharge disc 11, a gland nut 13 is arranged above the connecting flange 12, a throttle orifice plate A14 is arranged above the gland nut 13, and a throttle orifice plate B15 is arranged above the throttle orifice plate A14, a discharge flange 16 is arranged on the outer side of the throttle orifice plate B15, and an end cover 21 is arranged above the discharge flange 16.

The utility model discloses in: a sliding structure is formed between the valve clack 4 and the valve body 1, the small valve clack 9 is in threaded connection with the shift fork 7, and a clamping structure is formed between one end of the shift fork 7 and the valve clack 4; the valve clack 4 and the valve body 1 can slide mutually, and the small valve clack 9 and the shifting fork 7 are connected mutually, so that the valve clack 4 can move left and right according to the change of flow, a bypass can be opened or closed, and the backflow of fluid is prevented.

The utility model discloses in: an elastic structure is formed between the shifting fork 7 and the small spring 8, an elastic structure is formed between the valve clack 4 and the large spring 6, and a sealing structure is formed between the valve clack 4 and the valve body 1 through a valve bushing A5; the mutual block of shifting fork 7 and valve clack 4 can guarantee to shift fork 7 and the stability that valve clack 4 is connected, can carry out the restriction of scope to shifting fork 7's removal through little spring 8, and big spring 6 can restrict valve clack 4's removal, has avoided current empty row check valve simple structure, opens and close the mode single, the not good enough problem of its comprehensive properties.

The utility model discloses in: the valve clack 4 forms a sealing structure with the valve body 1 through a bush B20, and the valve clack 4 penetrates through the bush B20; the bush B20 increases the sealing performance between the valve flap 4 and the valve body 1.

The utility model discloses in: the washers 18 are symmetrically distributed about the horizontal center line of the shaft sleeve 17, and the shaft sleeve 17 is coincided with the vertical center line of the shifting fork 7; the gasket 18 has the effects of fastening and preventing slipping at the upper end and the lower end of the shaft sleeve 17, and can increase the tightness of the joint and improve the sealing property.

The utility model discloses in: a communicating structure is formed between the orifice plate A14 and the valve body 1, and a communicating structure is formed between the orifice plate B15 and the valve body 1; the orifice a14 and the orifice B15 can play a role of throttling during the fluid communication inside the valve body 1.

The utility model discloses in: the end cover 21 is movably connected with the valve body 1, and the end cover 21 is matched with the valve body 1; the end cover 21 can facilitate the connection between the valve body 1 and the water pump and the installation or the disassembly of the valve body, thereby greatly increasing the practicability of the air exhaust check valve device.

The working principle of the air discharge check valve device is as follows: firstly, connecting a valve body 1 with a water pump through an end cover 21, installing the valve body 1 at the outlet of the pump, installing a valve clack 4 on the valve body 1 through a valve clack seat 2, connecting a shifting fork 7 with a discharge disc 11 through a connecting fork 10, connecting an inlet flange 19 with a discharge flange 16 through a connecting flange 12 in a tense manner, and clamping the other end of the shifting fork 7 in a valve clack groove; secondly, after the pump body is started, the discharge flange 16 is screwed, the compression nut 13 is tightened, fluid flows into the valve body 1 through the orifice plate A14 and the orifice plate B15, the fluid is discharged downwards through the discharge disc 11 and flows through the valve clack 4, when the flow in the valve body 1 changes, the valve clack 4 moves left and right according to the flow change, so that the valve clack 4 can be driven to move left and right, when the valve clack 4 moves right, the valve bushing A5 moves right synchronously, the valve clack 4 is connected with the bushing B20, the valve clack 4 can be sealed, at the moment, the large spring 6 and the small spring 8 are stretched mutually, a bypass is closed, the valve clack 4 is positioned through the gland 3, and the normal transmission switch of the valve clack 4 is ensured; then when the valve clack 4 moves leftwards, the valve clack can be far away from the bush B20, the large spring 6 and the small spring 8 contract mutually at the moment, the bypass can be opened, the backflow of fluid is prevented, and meanwhile, the shift fork 7 and the small valve clack 9 move to open the bypass for circulation, so that the minimum flow required by the pump is ensured; finally, the gaskets 18 play a role in fastening and preventing skidding at the upper end and the lower end of the shaft sleeve 17, and meanwhile, the tightness of the joint is improved, and the sealing performance is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Air-discharge check valve device, including valve body (1) and shift fork (7), its characterized in that: the valve comprises a valve body (1), a valve clack seat (2) is mounted inside the valve body (1), a gland (3) is mounted above the valve clack seat (2), a valve clack (4) is mounted on the right side of the gland (3), a bushing B (20) is mounted on the right side of the valve clack (4), a valve bushing A (5) is mounted inside the valve clack (4), a large spring (6) is mounted inside the valve bushing A (5), a pull fork (7) is mounted on the right side of the large spring (6), an inlet flange (19) is mounted on the right side of the pull fork (7), a small spring (8) is mounted inside the pull fork (7), a small valve clack (9) is mounted above the small spring (8), a shaft sleeve (17) is mounted below the small spring (8), a gasket (18) is mounted on the inner side of the shaft sleeve (17), a connecting fork (10) is mounted above the small valve clack (9), and the top of yoke (10) installs discharge dish (11), flange (12) are installed to the top of discharge dish (11), and flange (12) top is provided with gland nut (13), the top of gland nut (13) is provided with orifice plate A (14), and orifice plate A (14) top is provided with orifice plate B (15), discharge flange (16) are installed in the outside of orifice plate B (15), and end cover (21) are installed to the top of discharging flange (16).

2. The air discharge check valve device of claim 1, wherein: constitute sliding construction between valve clack (4) and valve body (1), be threaded connection between little valve clack (9) and the fork (7) to constitute the block structure between one end of fork (7) and valve clack (4).

3. The air discharge check valve device of claim 1, wherein: constitute elastic construction between shift fork (7) and little spring (8), constitute elastic construction between valve clack (4) and big spring (6), and constitute seal structure between valve clack (4) and valve body (1) through valve bush A (5).

4. The air discharge check valve device of claim 1, wherein: the valve clack (4) forms a sealing structure with the valve body (1) through a bushing B (20), and the valve clack (4) penetrates through the bushing B (20).

5. The air discharge check valve device of claim 1, wherein: the washers (18) are symmetrically distributed about the horizontal center line of the shaft sleeve (17), and the shaft sleeve (17) is coincided with the vertical center line of the shifting fork (7).

6. The air discharge check valve device of claim 1, wherein: a communicating structure is formed between the throttle orifice A (14) and the valve body (1), and a communicating structure is formed between the throttle orifice B (15) and the valve body (1).

7. The air discharge check valve device of claim 1, wherein: the end cover (21) is movably connected with the valve body (1), and the end cover (21) is matched with the valve body (1).