CN218267403U

CN218267403U - One-way valve with flow limiting function

Info

Publication number: CN218267403U
Application number: CN202222475228.9U
Authority: CN
Inventors: 王勇; 郭建恒
Original assignee: Gtc Gas Technology Components Co ltd
Current assignee: Gtc Gas Technology Components Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-01-10
Anticipated expiration: 2032-09-19

Abstract

The utility model aims at providing a simple structure realizes the complex function of check valve and current limiter to can guarantee to have the check valve of taking the current limiting function that minimum flow passes through. The utility model discloses a valve body and piston, be equipped with the import and the export that are linked together on the valve body, the piston with the valve body is floated and is connected, the piston with import looks adaptation, be provided with the gasket on the piston, the valve body is being close to import department is provided with a plurality of arch, the gasket top is leaned on in the arch. The utility model discloses be applied to check valve technical field.

Description

One-way valve with flow limiting function

Technical Field

The utility model discloses be applied to check valve technical field, in particular to take check valve of current-limiting function.

Background

The check valve is a device that fluid can only flow in along an inlet and the medium at an outlet cannot flow back, and is also called a check valve or a check valve and used for preventing liquid from flowing reversely in a hydraulic system or preventing compressed air from flowing reversely in a pneumatic system. When the pressure of the water inlet is higher and higher, the flow rate of the fluid flowing through the one-way valve is higher, and in some cases, in order to limit the flow rate, a flow restrictor needs to be added, but the cost is increased.

As shown in fig. 1, the conventional check valve mainly includes a top cover 19, a bottom cover 20, a sealing plug 21, a spring member 22, an external sealing ring 23 and an internal sealing ring 24, the top cover 19 is connected to the bottom cover 20, the top cover 19 is provided with an inlet hole 25, the bottom cover 21 is provided with an outlet hole 26, the inlet hole 25 is communicated with the outlet hole 26, the external sealing ring 23 is sleeved on the top cover 19, the internal sealing ring 24 is sleeved on the sealing plug 21, the sealing plug 21 is connected to the bottom cover 20 through the spring member 22, and the sealing plug 21 is adapted to the inlet hole 25. The outer sealing ring 23 and the inner sealing ring 24 divide the space where the top cover 19 and the bottom cover 20 are located, and when the fluid pressure at the inlet 25 is not enough to push the sealing plug 21 to compress the spring member 22, the sealing plug 21 is tightly pressed on the top cover 19 under the elastic force of the spring member 22, so that the sealing plug 21 blocks the inlet 25; when the pressure of the fluid in the inlet 25 is large enough to push the sealing plug 21 to compress the spring element 22, the fluid in the inlet 25 can flow to the outlet 26, and the flow rate gradually increases to the maximum as the sealing plug 21 moves downwards gradually, but if the flow rate is always in the maximum state, the normal operation of the hydraulic system or the pneumatic system is easily affected.

A prior patent document with publication number CN213809036U proposes a check valve with a flow limiting function, which includes a valve body, a valve core, and a limiting mechanism, wherein the limiting mechanism is disposed inside the valve body, the valve core is slidably fitted on the limiting mechanism, the valve core is located in a flow limiting cavity of the valve body, two ends of the valve body are further provided with tapered tubes both communicated with the flow limiting cavity, two ends of the valve core are provided with tapered cores adapted to the tapered tubes, when a fluid medium in the tube body normally flows, the valve body is in a conducting state, and when a pressure at any end of the valve body is too large, the valve core limits a fluid flow or prevents a fluid from flowing back. However, when the pressure at either end of the valve body is too high, the conical core is completely fitted in the conical pipe, and the conical pipe is completely blocked, so that no fluid can pass through the inside of the valve body, namely the flow is zero, and the normal operation of a hydraulic system or a pneumatic system is easily influenced. If a check valve with a flow limiting function, which has a simple structure, realizes the composite function of the check valve and the flow limiter and can ensure the minimum flow to pass through, can be designed, the problems can be well solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a simple structure, realize the complex function of check valve and current limiter to can guarantee to have the check valve of taking the current limiting function that minimum flow passes through.

The utility model adopts the technical proposal that: the utility model discloses a valve body and piston, be equipped with the import and the export that are linked together on the valve body, the piston with the valve body is floated and is connected, the piston with import looks adaptation, be provided with the gasket on the piston, the valve body is being close to import department is provided with a plurality of arch, the gasket top is leaned on in the arch.

Further, the piston comprises a plug body and a guide post, and the plug body and the gasket are arranged on the guide post at a certain interval.

Further, a plurality of the bulges are arranged on the valve body in a surrounding mode at certain intervals.

Furthermore, a first annular groove is formed in the plug body, the check valve with the flow limiting function further comprises a first sealing ring, the first sealing ring is matched in the first annular groove, an annular boss is arranged on the inner wall of the inlet, and the first sealing ring abuts against the annular boss.

Furthermore, the piston further comprises two limiting blocks, the two limiting blocks are arranged on the guide pillar at intervals, the gasket is sleeved on the guide pillar, and the gasket is located between the two limiting blocks.

Furthermore, the check valve with the flow limiting function further comprises a spring, a positioning column is arranged on the valve body, the spring is sleeved on the positioning column, a positioning hole is formed in the positioning column, the guide column is matched in the positioning hole, and the spring is compressed between the plug body and the valve body.

Further, the valve body comprises a front cover and a rear cover which are connected, the protrusions are arranged on the front cover, and the positioning columns are arranged on the rear cover.

Furthermore, a second annular groove is formed in the front cover, the one-way valve with the flow limiting function further comprises a second sealing ring, and the second sealing ring is matched in the second annular groove.

The utility model has the advantages that: the check valve comprises a valve body and a piston, wherein an inlet and an outlet which are communicated with each other are arranged on the valve body, the piston is in floating connection with the valve body, and when the fluid pressure is not enough to push the piston, the piston is adapted in the inlet, so that the inlet is sealed, namely, the check valve is in a closed state; be provided with the gasket on the piston, the valve body is being close to import department is provided with a plurality of arch, constantly increases and can promote as fluid pressure the piston is kept away from gradually during the import, the utility model discloses a check valve is in the state of opening, and the fluid just can be followed the import is past the export flows, and this moment the gasket also can be close to gradually the import, the increase of restriction flow works as the gasket top is leaned on in a plurality of when protruding, a plurality of space between the arch can be guaranteed to have minimum flow to pass through, avoids the flow to be in too big state always, has played the effect of current-limiting, ensures hydraulic system or pneumatic system's normal operating, and the reliability is high.

Drawings

FIG. 1 is a cross-sectional view of a prior art check valve;

fig. 2 is a cross-sectional view of the present invention;

fig. 3 is a perspective view of the present invention;

fig. 4 is an exploded view of the present invention.

Detailed Description

As shown in fig. 1 to 4, in this embodiment, the present invention includes a valve body and a piston 1, the valve body is provided with an inlet 2 and an outlet 3 which are communicated with each other, the piston 1 is connected with the valve body in a floating manner, when the fluid pressure is not enough to push the piston 1, the piston 1 is fitted in the inlet 2, so as to seal the inlet 2, that is, the one-way valve of the present invention is in a closed state; be provided with gasket 4 on the piston 1, the valve body is being close to 2 departments of import are provided with the arch of a plurality of 5, constantly increase and can promote as fluid pressure piston 1 keeps away from gradually during import 2, the utility model discloses a check valve is in the state of opening, and the fluid just can be followed import 2 is past export 3 flows, and this moment gasket 4 also can be close to gradually import 2, the increase of restriction flow works as gasket 4 leans on a plurality of when protruding 5 is last, a plurality of minimum flow can be guaranteed to pass through in the space between the arch 5, avoids the flow to be in too big state always, has played the effect of current-limiting, ensures hydraulic system or pneumatic system's normal operating, and the reliability is high.

In the present embodiment, the piston 1 includes a plug body 6 and a guide post 7, and the plug body 6 and the gasket 4 are disposed on the guide post 7 at a certain interval. Wherein, when the plug body 6 is gradually close to the inlet 2, the gasket 4 is gradually far away from the inlet 2; as the plug body 6 is progressively further from the inlet 2, the gasket 4 is progressively closer to the inlet 2.

In this embodiment, a plurality of the protrusions 5 are circumferentially disposed on the valve body at certain intervals. It follows that when the gasket 4 is resting on a plurality of the protrusions 5, the spaces between the plurality of protrusions 5 ensure a minimum flow.

In this embodiment, be equipped with first ring channel 8 on the cock body 6, the check valve of taking the current-limiting function still includes first sealing washer 9, first sealing washer 9 adaptation is in first ring channel 8, be provided with annular boss 10 on the inner wall of import 2, first sealing washer 9 top is leaned on the annular boss 10. When the plug body 6 is fitted in the inlet 2, the first sealing ring 9 is compressed between the plug body 6 and the annular boss 10, so that a sealing effect is achieved, and the problem of water leakage is avoided.

In this embodiment, the piston 1 further includes two limiting blocks 11, the two limiting blocks 11 are disposed on the guide pillar 7 at intervals, the gasket 4 is sleeved on the guide pillar 7, and the gasket 4 is located between the two limiting blocks 11, so as to avoid the problem that the gasket 4 falls off. Wherein, the gasket 4 is made of rubber material, and has certain elasticity, thereby being convenient for disassembling, assembling and replacing the gasket 4.

In this embodiment, the check valve with the flow limiting function further includes a spring 12, a positioning column 13 is disposed on the valve body, the spring 12 is sleeved on the positioning column 13, a positioning hole 14 is disposed on the positioning column 13, the guide column 7 is fitted in the positioning hole 14, and the spring 12 is compressed between the plug body 6 and the valve body. Wherein the spring 12 is compressed when the fluid pressure is increasing and is able to push the piston 1 gradually away from the inlet 2; when the fluid pressure is gradually reduced until the fluid pressure is smaller than the elastic force of the spring 12, the spring 12 can provide enough elastic force for the plug body 6 to move and reset the plug body 6 to be re-fitted in the inlet 2.

In this embodiment, the valve body includes a front cover 15 and a rear cover 16 connected to each other, the plurality of protrusions 5 are disposed on the front cover 15, and the positioning posts 13 are disposed on the rear cover 16. Wherein the inlet 2 is arranged on the front cover 15 and the outlet 3 is arranged on the rear cover 16.

In this embodiment, a second annular groove 17 is formed on the front cover 15, and the check valve with a flow limiting function further includes a second sealing ring 18, and the second sealing ring 18 is fitted in the second annular groove 17. Wherein, work as the utility model discloses a when the check valve was installed on the shell body, second sealing washer 18 can be compressed tightly between protecgulum 15 and the shell body to play sealed effect, avoid appearing the problem of leaking.

Claims

1. Take check valve of current-limiting function, it includes valve body and piston (1), be equipped with import (2) and export (3) that are linked together on the valve body, piston (1) with the valve body floats to be connected, piston (1) with import (2) looks adaptation, its characterized in that: the piston (1) is provided with a gasket (4), the valve body is provided with a plurality of bulges (5) at the position close to the inlet (2), and the gasket (4) is propped against the bulges (5).

2. The check valve with a flow restricting function according to claim 1, characterized in that: the piston (1) comprises a plug body (6) and a guide post (7), wherein the plug body (6) and the gasket (4) are arranged on the guide post (7) at a certain interval.

3. The check valve with a flow restricting function according to claim 1, characterized in that: the plurality of bulges (5) are arranged on the valve body in a surrounding way at certain intervals.

4. The check valve with a flow restricting function according to claim 2, characterized in that: be equipped with first ring channel (8) on cock body (6), take current limiting function's check valve still includes first sealing washer (9), first sealing washer (9) adaptation is in first ring channel (8), be provided with annular boss (10) on the inner wall of import (2), first sealing washer (9) top is leaned on annular boss (10).

5. The check valve with a flow restricting function according to claim 2, characterized in that: the piston (1) further comprises two limiting blocks (11), the two limiting blocks (11) are arranged on the guide pillar (7) at intervals, the gasket (4) is sleeved on the guide pillar (7), and the gasket (4) is located between the two limiting blocks (11).

6. The check valve with a flow restricting function according to claim 2, characterized in that: the check valve with the flow limiting function further comprises a spring (12), a positioning column (13) is arranged on the valve body, the spring (12) is sleeved on the positioning column (13), a positioning hole (14) is formed in the positioning column (13), the guide column (7) is matched in the positioning hole (14), and the spring (12) is compressed between the plug body (6) and the valve body.

7. The check valve with a flow restricting function according to claim 6, characterized in that: the valve body comprises a front cover (15) and a rear cover (16) which are connected, the protrusions (5) are arranged on the front cover (15), and the positioning columns (13) are arranged on the rear cover (16).

8. The check valve with a flow restricting function according to claim 7, wherein: the front cover (15) is provided with a second annular groove (17), the one-way valve with the flow limiting function further comprises a second sealing ring (18), and the second sealing ring (18) is matched with the second annular groove (17).