CN115370808A - One-way valve with flow limiting function - Google Patents

Abstract

The invention aims to provide a check valve with a flow limiting function, which has a simple structure, realizes the composite function of the check valve and a flow limiter, and can ensure the minimum flow to pass through. The 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, the piston is matched with the inlet, a gasket is arranged on the piston, a plurality of bulges are arranged on the valve body close to the inlet, and the gasket abuts against the bulges. The invention is applied to the technical field of one-way valves.

Description

Check valve with flow limiting function

technical field

The invention is applied in the technical field of one-way valves, and in particular relates to a one-way valve with a flow limiting function.

Background technique

The check valve is a device in which the fluid can only flow in along the inlet, but the outlet medium cannot return. flow. When the pressure of the water inlet increases, the fluid flow through the check valve increases. In some cases, in order to limit the excessive flow, it is necessary to add a flow restrictor, but the cost will also increase accordingly.

As shown in Figure 1, the existing one-way 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, and the top cover 19 and the bottom cover 20 are connected. 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 communicates with the outlet hole 26, the outer sealing ring 23 is set on the top cover 19, and the inner sealing ring 24 is set on the sealing plug 21 Above, the sealing plug 21 is connected with the bottom cover 20 through the spring member 22 , and the sealing plug 21 is matched with the inlet hole 25 . Wherein, the outer sealing ring 23 and the inner sealing ring 24 separate the space where the top cover 19 and the bottom cover 20 are located. When the fluid pressure at the inlet hole 25 is not enough to push the sealing plug 21 to compress the spring member 22, the sealing plug 21 will Under the elastic force of the spring member 22, it is tightly pressed against the top cover 19, so that the sealing plug 21 blocks the inlet hole 25; when the fluid pressure at the inlet hole 25 is large enough, the sealing plug 21 can be pushed to compress the spring member 22 , the fluid at the inlet hole 25 can flow toward the outlet hole 26. As the sealing plug 21 gradually moves down, the flow rate gradually increases until it reaches the maximum. However, if the flow rate is always at the maximum state, it is easy to affect the hydraulic system or pneumatic system. normal operation.

An existing patent document with a publication number of CN213809036U proposes a one-way valve with a flow limiting function, which includes a valve body, a valve core and a limiting mechanism. On the position mechanism, the spool is located in the flow-limiting chamber of the valve body, and both ends of the valve body are provided with tapered tubes that communicate with the flow-limiting chamber, and both ends of the valve core are provided with When the fluid medium in the pipe body flows normally, the valve body is in a conduction state. When the pressure at either end of the valve body is too high, the valve core restricts the fluid flow or prevents the fluid from returning. However, when the pressure at either end of the valve body is too high and the cone core is completely fitted in the tapered tube, the tapered tube is completely blocked, so that no fluid can pass through the inside of the valve body, that is, the flow rate is zero. It is easy to affect the normal operation of the hydraulic system or pneumatic system. If can design a kind of simple in structure, realize the compound function of check valve and current limiter, and can guarantee the check valve with flow limiting function that minimum flow passes through, then can well solve above-mentioned problem.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a check valve with a flow limiting function that has a simple structure, realizes the composite function of a check valve and a flow limiter, and can ensure the passage of the minimum flow rate. .

The technical solution adopted in the present invention is: the present invention includes a valve body and a piston, the valve body is provided with an inlet and an outlet connected to each other, the piston is connected to the valve body in a floating manner, and the piston is connected to the inlet. Fitting, the piston is provided with gaskets, and the valve body is provided with several protrusions near the inlet, and the gaskets lean against the protrusions.

Further, the piston includes 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, several protrusions are arranged around the valve body at certain intervals.

Further, the plug body is provided with a first annular groove, and the one-way valve with flow limiting function also includes a first sealing ring, and the first sealing ring is fitted in the first annular groove, so An annular boss is arranged on the inner wall of the inlet, and the first sealing ring leans against the annular boss.

Further, the piston also includes two limit blocks, the two limit blocks are arranged at intervals on the guide post, the gasket is sleeved on the guide post, and the gasket is located between the two between the limit blocks.

Further, the one-way valve with flow limiting function also includes a spring, the valve body is provided with a positioning post, the spring is sleeved on the positioning post, and the positioning post is provided with a positioning hole, so The guide post fits in the positioning hole, and the spring is compressed between the plug body and the valve body.

Further, the valve body includes a connected front cover and a rear cover, the plurality of protrusions are arranged on the front cover, and the positioning posts are arranged on the rear cover.

Further, the front cover is provided with a second annular groove, and the one-way valve with flow limiting function further includes a second sealing ring, and the second sealing ring is fitted in the second annular groove.

The beneficial effects of the present invention are: the present invention includes a valve body and a piston, the valve body is provided with an inlet and an outlet connected to each other, the piston is floatingly connected with the valve body, when the fluid pressure is not enough to push the piston , the piston fits in the inlet, thereby sealing the inlet, that is, the one-way valve of the present invention is in a closed state; the piston is provided with a gasket, and the valve body is close to the inlet There are several protrusions, when the fluid pressure increases continuously and can push the piston away from the inlet gradually, the one-way valve of the present invention is in an open state, and the fluid can flow from the inlet to the outlet, while At this time, the gasket will also gradually approach the inlet to limit the increase of the flow rate. When the gasket is pressed against several of the protrusions, the gap between the several protrusions can be guaranteed to have a minimum The flow is passed through to avoid the flow being in a state of being too large all the time, and it acts as a current limiter to ensure the normal operation of the hydraulic system or pneumatic system with high reliability.

Description of drawings

Fig. 1 is the sectional view of existing one-way valve;

Fig. 2 is a sectional view of the present invention;

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

Figure 4 is an exploded view of the present invention.

Detailed ways

As shown in Figures 1 to 4, in this embodiment, the present invention includes a valve body and a piston 1, the valve body is provided with a connected inlet 2 and an outlet 3, and the piston 1 floats with the valve body connection, when the fluid pressure is not enough to push the piston 1, the piston 1 fits in the inlet 2, thereby sealing the inlet 2, that is, the one-way valve of the present invention is in a closed state; the piston 1 is provided with a gasket 4, and the valve body is provided with several protrusions 5 near the inlet 2. When the fluid pressure increases continuously and can push the piston 1 away from the inlet 2, the present invention When the one-way valve is in the open state, the fluid can flow from the inlet 2 to the outlet 3, and at this time, the gasket 4 will gradually approach the inlet 2 to limit the increase of the flow rate. When the gasket 4 4 When leaning against several protrusions 5, the gap between several protrusions 5 can ensure the minimum flow to pass through, avoiding that the flow is always in an excessive state, and plays the role of flow limitation, ensuring that the hydraulic system Or the normal operation of the pneumatic system with high reliability.

In this embodiment, the piston 1 includes a plug body 6 and a guide post 7, and the plug body 6 and the gasket 4 are arranged on the guide post 7 at a certain interval. Wherein, when the plug body 6 gradually approaches the inlet 2, the gasket 4 will gradually move away from the inlet 2; when the plug body 6 gradually moves away from the inlet 2, the gasket 4 will gradually move away from the inlet 2 will gradually approach the entrance 2.

In this embodiment, several protrusions 5 are arranged around the valve body at certain intervals. It can be seen that, when the gasket 4 abuts against several of the protrusions 5 , the gaps between the several of the protrusions 5 can ensure the passage of the minimum flow.

In this embodiment, the plug body 6 is provided with a first annular groove 8, and the one-way valve with flow limiting function also includes a first sealing ring 9, which is adapted to the In the first annular groove 8 , an annular boss 10 is provided on the inner wall of the inlet 2 , and the first sealing ring 9 leans against the annular boss 10 . Wherein, when the plug body 6 fits in the inlet 2, the first sealing ring 9 is compressed between the plug body 6 and the annular boss 10, so as to play a sealing role, Avoid the problem of water leakage.

In this embodiment, the piston 1 further includes two limit blocks 11, the two limit blocks 11 are arranged at intervals on the guide post 7, and the gasket 4 is sleeved on the guide post 7 Above, the gasket 4 is located between the two limiting blocks 11 to avoid the problem of the gasket 4 falling off. Wherein, the gasket 4 is made of rubber material, which has a certain degree of elasticity, so that the gasket 4 can be easily disassembled and replaced.

In this embodiment, the one-way valve with flow limiting function further includes a spring 12, the valve body is provided with a positioning post 13, the spring 12 is sleeved on the positioning post 13, and the positioning post 13 is provided with a positioning hole 14, the guide post 7 fits in the positioning hole 14, and the spring 12 is compressed between the plug body 6 and the valve body. Wherein, when the fluid pressure increases continuously and can push the piston 1 away from the inlet 2 gradually, the spring 12 will be compressed; The spring 12 can provide sufficient elastic force for the plug body 6 , so that the plug body 6 can move and reset, and be refitted in the inlet 2 .

In this embodiment, the valve body includes a connected front cover 15 and a rear cover 16, several of the protrusions 5 are arranged on the front cover 15, and the positioning post 13 is arranged on the rear cover 16 on. 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, the front cover 15 is provided with a second annular groove 17, and the one-way valve with flow limiting function also includes a second sealing ring 18, and the second sealing ring 18 is adapted to the In the second annular groove 17. Wherein, when the one-way valve of the present invention is installed on the outer shell, the second sealing ring 18 will be compressed between the front cover 15 and the outer shell, so as to play a sealing role and avoid the problem of water leakage .

Claims (8)

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 restriction function according to claim 1, wherein: 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), the check valve of taking 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 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 restriction function of claim 6, wherein: the valve body comprises a front cover (15) and a rear cover (16) which are connected, the plurality of 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 check valve with the flow limiting function further comprises a second sealing ring (18), and the second sealing ring (18) is matched in the second annular groove (17).

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