CN218267388U

CN218267388U - Silencing check valve

Info

Publication number: CN218267388U
Application number: CN202222369917.1U
Authority: CN
Inventors: 周玉图; 蔡绪添
Original assignee: Zhejiang Longyu Valve Co ltd
Current assignee: Zhejiang Longyu Valve Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-01-10
Anticipated expiration: 2032-09-06

Abstract

The utility model belongs to the technical field of valves, in particular to a noise elimination check valve, which comprises a valve body; the valve body comprises a first valve flap; the bottom end of the first valve clack is provided with a non-return structure, the non-return structure comprises a first sliding rod, the bottom end of the first sliding rod is inserted into a deep groove, the deep groove is formed in the top end of a second sliding rod, the second sliding rod is sleeved in a fixed rod, the outer side of the fixed rod is fixedly connected with a chassis, the top end of the second sliding rod is fixedly connected with a second valve clack, the bottom end of the second valve clack is fixedly connected with a second spring, and the bottom end of the second spring is fixedly connected to the fixed rod; through the structural design of non return structure, realized the function of dual non return, solved common noise elimination check valve inside and only be provided with a set of non return structure, the phenomenon that a small amount of medium refluences can appear unavoidably when taking place the refluence, the relatively poor problem of effect of non return has improved the non return effect.

Description

Silencing check valve

Technical Field

The utility model relates to the technical field of valves, specifically a noise elimination check valve.

Background

A silencing check valve is an automatic valve, also called a check valve and a one-way valve, used for preventing medium backflow, motor reversal and the like and is usually connected to the outlet position of a pump.

The silencing check valve is characterized in that the valve flap automatically opens and closes by means of the flow of the medium, and the medium is allowed to flow in one direction only. Normally, such valves are self-actuating, in which the flap opens under the action of fluid pressure flowing in one direction and, in the opposite direction, the flap is closed against the valve seat by the fluid pressure and its own weight, thereby shutting off the flow.

The common silencing check valve is only internally provided with a group of check structures, so that a small amount of medium flows back inevitably when backflow occurs, and the check effect is poor; accordingly, a noise-reducing check valve has been proposed to address the above problems.

SUMMERY OF THE UTILITY MODEL

In order to compensate prior art's not enough, the inside one set of non return structure that only is provided with of common noise elimination check valve, the phenomenon that a small amount of medium refluxes can appear unavoidably when taking place to flow backwards, the relatively poor problem of effect of non return, the utility model provides a noise elimination check valve.

The utility model provides a technical scheme that its technical problem adopted is: the utility model relates to a noise elimination check valve, which comprises a valve body; the valve body comprises a first valve flap;

the bottom of first valve clack is provided with the non return structure, the non return structure includes first slide bar, the inside of establishing the deep trouth is inserted to the bottom of first slide bar, the deep trouth is seted up on the top of second slide bar, the inside at the dead lever is established to second slide bar cover, the outside and the chassis fixed connection of dead lever, the top fixedly connected with second valve clack of second slide bar, the bottom fixedly connected with second spring of second valve clack, the bottom fixed connection of second spring is on the dead lever.

Preferably, the bottom fixedly connected with fixed block of first valve clack, the fixed block cover is established in the outside of first slide bar and fixed block fixed connection in the bottom of first valve clack, the both sides fixedly connected with bracing piece of fixed block, the bottom fixed connection of bracing piece and first valve clack, the first spring of bottom fixedly connected with of fixed block, the bottom and the rubber gasket fixed connection of first spring.

Preferably, fixedly connected with sealing block on the second valve clack, sealing block inserts the inside of establishing at the recess, the recess is seted up in solid fixed ring's bottom, gu fixed ring fixed connection is on the inner wall of valve body.

Preferably, the inside fixedly connected with packing ring of recess, the packing ring is the rubber material, gu the fixed ring's top is seted up there is the inclined plane.

Preferably, a chassis sealing ring is arranged at the top end of the chassis and made of rubber, and the chassis is in threaded connection with the bottom end of the valve body.

Preferably, a sealing ring is arranged on the periphery of the first valve clack, the sealing ring is fixedly connected to the inner wall of the flange plate, and the sealing ring is made of rubber.

The utility model discloses an useful part lies in:

the utility model realizes the function of double non-return through the structural design of the non-return structure, solves the problems that the common noise elimination check valve is internally provided with only one set of non-return structure, and a small amount of medium flows backwards inevitably when the backflow occurs, and the non-return effect is poor;

the utility model discloses a chassis and valve body bottom threaded connection have realized being convenient for carry out the function dismantled to the non return structure, have solved the non return structure and have suspended back the effect and reduce long-time use, need carry out the problem of changing.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below 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 inventive labor.

FIG. 1 is a perspective view of a muffling check valve of a first embodiment;

FIG. 2 is a schematic cross-sectional view of a check valve according to the first embodiment;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

fig. 5 is a schematic cross-sectional view of the sound-damping check valve according to the second embodiment.

In the figure: 1. a valve body; 20. a first valve flap; 21. a first slide bar; 22. a second valve flap; 23. a first spring; 24. a fixed block; 25. a second spring; 26. a support bar; 27. a rubber gasket; 28. deep grooves; 29. a seal ring; 30. a fixing ring; 31. a sealing block; 32. a groove; 33. a gasket; 40. a second slide bar; 42. a chassis; 43. a chassis seal ring; 44. fixing the rod; 45. a flange plate; 50. cushion blocks; 51. and (6) a gasket.

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 efforts belong to the protection scope of the present invention.

Example one

Referring to fig. 1-4, a muffling check valve includes a valve body 1; the valve body 1 comprises a first flap 20;

the bottom end of the first valve flap 20 is provided with a non-return structure, the non-return structure comprises a first slide bar 21, the bottom end of the first slide bar 21 is inserted into a deep groove 28, the deep groove 28 is formed at the top end of a second slide bar 40, the second slide bar 40 is sleeved in a fixed bar 44, the outer side of the fixed bar 44 is fixedly connected with a chassis 42, the top end of the second slide bar 40 is fixedly connected with a second valve flap 22, the bottom end of the second valve flap 22 is fixedly connected with a second spring 25, and the bottom end of the second spring 25 is fixedly connected with the fixed bar 44;

in operation, the first valve flap 20 is pushed under the pressure of the medium, the first valve flap 20 drives the first sliding rod 21 to slide in the deep groove 28, the first spring 23 is compressed, the second valve flap 22 is pressed by the first spring 23, the second sliding rod 40 slides in the fixing rod 44, the fixing rod 44 is fixed by the chassis 42, so that the first valve flap 20 and the second valve flap 22 are opened, and the medium can flow out through the interior of the valve body 1.

The bottom end of the first valve clack 20 is fixedly connected with a fixed block 24, the fixed block 24 is sleeved outside the first sliding rod 21, the fixed block 24 is fixedly connected to the bottom end of the first valve clack 20, two sides of the fixed block 24 are fixedly connected with supporting rods 26, the supporting rods 26 are fixedly connected with the bottom end of the first valve clack 20, the bottom end of the fixed block 24 is fixedly connected with a first spring 23, and the bottom end of the first spring 23 is fixedly connected with a rubber gasket 27;

when the valve is in use, the supporting rod 26 plays a role in supporting the first valve clack 20, the first spring 23 fixedly connected with the bottom end of the fixing block 24 enables the first valve clack 20 to quickly push the first valve clack 20 to return to an initial state when the first valve clack 20 is not subjected to medium pressure or pressure reduction, so that the effect of quickly resetting the first valve clack 20 is achieved, the non-return effect is improved, and the rubber gasket 27 is used for buffering the extrusion borne by the first spring 23.

The second valve flap 22 is fixedly connected with a sealing block 31, the sealing block 31 is inserted into a groove 32, the groove 32 is formed in the bottom end of a fixing ring 30, and the fixing ring 30 is fixedly connected to the inner wall of the valve body 1;

during operation, play the non return effect of second valve clack 22 to the medium through sealed piece 31 and recess 32, seted up recess 32 at solid fixed ring 30's bottom, sealed piece 31 is inserted and is established in recess 32, and when taking place the refluence, sealed piece 31 can insert to recess 32 under the effect of second spring 25 in, and second valve clack 22 also forms sealedly with solid fixed ring 30's bottom butt simultaneously to reach the effect of non return.

A gasket 33 is fixedly connected inside the groove 32, the gasket 33 is made of rubber, and an inclined plane is formed at the top end of the fixing ring 30;

during operation, at the inside fixed connection's of recess 32 packing ring 33, through packing ring 33 and sealed piece 31 butt, gap when having reduced sealed piece 31 and recess 32 butt has improved the non return effect, and the inclined plane of seting up on fixed ring 30 top can also be used to the impact of the medium of buffer valve body 1 inside to fixed ring 30 when flowing.

A chassis sealing ring 43 is arranged at the top end of the chassis 42, the chassis sealing ring 43 is made of rubber, and the chassis 42 is in threaded connection with the bottom end of the valve body 1;

during operation, in long-time use, the condition that the non return effect descends can be appeared to the inevitable non return structure of valve body 1, consequently needs to dismantle and change the non return structure, and dead lever 44 is fixed through chassis 42, chassis 42 and valve body 1's bottom threaded connection, wherein still is provided with chassis sealing washer 43 in order to improve valve body 1's leakproofness in chassis 42 and valve body 1 bottom threaded connection department.

A sealing ring 29 is arranged on the periphery of the first valve flap 20, the sealing ring 29 is fixedly connected to the inner wall of the flange plate 45, and the sealing ring 29 is made of rubber;

during operation, sealing washer 29 is the rubber material, has reduced the gap of first valve clack 20 with ring flange 45 when the contact, has improved the leakproofness of first valve clack 20, makes the non return effect of first valve clack 20 better.

Example two

Referring to fig. 5, as another embodiment of the present invention, in a first comparative example, the pad 50 is disposed at the bottom end inside the fixing rod 44, the gasket 51 is disposed at the bottom end of the deep groove 28, and both the pad 50 and the gasket 51 are made of rubber; in operation, the cushion block 50 is used for buffering the bottom end of the second slide bar 40 and the inner part of the fixing bar 44, and the pad 51 is used for buffering between the first slide bar 21 and the second slide bar 40.

The working principle is that only one group of check structures are arranged in a common silencing check valve, a small amount of medium backflow phenomenon is inevitably generated when backflow occurs, the check effect is poor, the first valve clack 20 and the second valve clack 22 play a role in preventing medium backflow, the first valve clack 20 is tightly attached to a sealing ring 29 in an initial state, a sealing block 31 fixedly connected to the second valve clack 22 is inserted in a groove 32 and abutted against a gasket 33, when a medium flows to a valve body 1 from one end, the first valve clack 20 pushes a first sliding rod 21 to slide in a deep groove 28 under the pressure of the medium, a first spring 23 is compressed, at the moment, the first valve clack 20 is not tightly attached to the sealing ring 29 any more, and the first valve clack 20 is in an open state, because the bottom end of the first spring 23 is fixedly connected to the second valve flap 22 through the rubber gasket 27, the first spring 23 presses the second valve flap 22 while the first spring 23 is compressed, the second sliding rod 40 fixedly connected to the bottom end of the second valve flap 22 slides inside the fixing rod 44, the second spring 25 is compressed, at this time, the sealing block 31 and the gasket 33 are not abutted, the second valve flap 22 is in an open state, the medium can flow out through the interior of the valve body 1, and when the first valve flap 20 is not subjected to pressure or the pressure is reduced, the first spring 23 and the second spring 25 which are compressed push the first valve flap 20 and the second valve flap 22 to return to the original state, so that the medium is prevented from flowing backwards.

Wherein first slide bar 21 cover is established in fixed block 24, at the both sides fixedly connected with bracing piece 26 of fixed block 24, bracing piece 26 and the bottom fixed connection of first valve clack 20 play the supporting effect to first valve clack 20 through bracing piece 26, packing ring 33 fixed connection is in the inside of recess 32 and packing ring 33 are the rubber material, the leakproofness between solid fixed ring 30 and sealed piece 31 has been increased, the top at solid fixed ring 30 has still been seted up the inclined plane and is used for reducing the impact of medium to solid fixed ring 30 when valve body 1 inside flows.

In long-time use, the condition that the non return effect descends can be difficult to avoid to appear to the inside non return structure of valve body 1, consequently needs to dismantle and change the non return structure, and dead lever 44 is fixed through chassis 42, chassis 42 and valve body 1's bottom threaded connection, wherein still is provided with chassis sealing washer 43 in order to improve valve body 1's leakproofness in chassis 42 and valve body 1 bottom threaded connection department.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the basic principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A muffling check valve, characterized in that: comprises a valve body (1); the valve body (1) comprises a first valve flap (20);

the bottom of first valve clack (20) is provided with non return structure, non return structure includes first slide bar (21), the inside of establishing deep trouth (28) is inserted to the bottom of first slide bar (21), the top at second slide bar (40) is seted up in deep trouth (28), the inside at dead lever (44) is established in second slide bar (40) cover, the outside and chassis (42) fixed connection of dead lever (44), the top fixedly connected with second valve clack (22) of second slide bar (40), the bottom fixedly connected with second spring (25) of second valve clack (22), the bottom fixed connection of second spring (25) is on dead lever (44).

2. The muffling check valve of claim 1, wherein: the bottom fixedly connected with fixed block (24) of first valve clack (20), fixed block (24) cover is established in the outside of first slide bar (21) and fixed block (24) fixed connection in the bottom of first valve clack (20), the both sides fixedly connected with bracing piece (26) of fixed block (24), the bottom fixed connection of bracing piece (26) and first valve clack (20), the first spring (23) of bottom fixedly connected with of fixed block (24), the bottom and rubber gasket (27) fixed connection of first spring (23).

3. A muffling check valve according to claim 2, wherein: fixedly connected with seals piece (31) on second valve lamella (22), the inside of establishing recess (32) is inserted in seals piece (31), the bottom at solid fixed ring (30) is seted up in recess (32), gu fixed ring (30) fixed connection is on the inner wall of valve body (1).

4. A muffling check valve according to claim 3, wherein: the inside fixedly connected with packing ring (33) of recess (32), packing ring (33) are the rubber material, the top of solid fixed ring (30) is seted up there is the inclined plane.

5. The muffling check valve of claim 4, wherein: the top of chassis (42) is provided with chassis sealing washer (43), chassis sealing washer (43) are the rubber material, chassis (42) and the bottom threaded connection of valve body (1).

6. The muffling check valve of claim 5, wherein: the periphery of the first valve clack (20) is provided with a sealing ring (29), the sealing ring (29) is fixedly connected to the inner wall of the flange plate (45), and the sealing ring (29) is made of rubber.