CN219827833U

CN219827833U - Pneumatic check valve capable of preventing whistle

Info

Publication number: CN219827833U
Application number: CN202320892207.9U
Authority: CN
Inventors: 徐世方; 姜昌国
Original assignee: Ningbo Xinbang Technology Co ltd
Current assignee: Ningbo Xinbang Technology Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-10-13
Anticipated expiration: 2033-04-20

Abstract

The utility model discloses a pneumatic check valve capable of preventing squeal, which comprises a valve body, wherein one end of the valve body is provided with a medium inlet end, the other end of the valve body is provided with a medium outlet end, the right side of the interior of the valve body is fixedly provided with a valve seat, the valve seat is provided with a valve core, one end of the valve core, which is far away from the valve seat, is fixed with a guide rod, the guide rod sequentially passes through guide holes formed in a front guide seat and a rear guide seat, a driving piece is welded and fixed on the guide rod, and the left side of the driving piece is welded and fixed with a damping cylinder. This prevent pneumatic check valve of squeaking, gas is impacted on the case from medium advance end, through four guide bars of group at this moment, compresses the spring, disk seat, case break away from this moment, and gas can pass valve pocket, damping chamber and medium in proper order and go out the end, and when the inside no gas circulation of pipeline, the spring that this moment resets and rebounds, drives disk seat, case closure, realizes the purpose that the valve body carries out unidirectional transport.

Description

Pneumatic check valve capable of preventing whistle

Technical Field

The utility model relates to the field of one-way valves, in particular to a whistle-preventing pneumatic one-way valve.

Background

The pneumatic one-way valve is a basic element of a pneumatic control system and is mainly used for one-way flow of the air circuit, namely, backflow prevention and check of compressed air; in the prior art, when compressed air flows in a valve body in a one-way valve, sharp whistle is generated by high-frequency vibration of a valve core, the valve core is abnormally worn by the high-frequency vibration of the valve core, the service life of the one-way valve is directly influenced, and finally the one-way valve fails in a check way.

In the prior art, the technical field similar to a one-way valve is searched, and the prior art discloses (application number: CN02207807. X) a safety valve reverse reflux device of an electric water heater; the electric water heater safety valve consists of a main shell, an outer leakage body, a water inlet spring, a pressure regulating cap and a reverse reflux device, wherein the reverse reflux device consists of a body, a valve cover, a pressure spring, a gasket seat, a flat gasket, an outer sleeve and a positioning column, the flat gasket is embedded in the gasket seat, the pressure spring is matched with the gasket seat, and the valve cover is propped against the body to be matched into a whole.

When in actual use, although the problem of howling can be solved, the pneumatic check valve not only needs to be matched with the reverse reflux valve, but also needs to be subjected to multi-layer automatic expansion and positioning control, has a complex structure, is difficult to adapt to the use occasion of the pneumatic check valve, is complex in maintenance and use, and has higher breakage rate.

Disclosure of Invention

The utility model aims to provide a pneumatic check valve capable of preventing squeal, so as to solve the defects in the prior art.

In order to achieve the above purpose, the pneumatic check valve capable of preventing squeal comprises a valve body, wherein one end of the valve body is provided with a medium inlet end, the other end of the valve body is provided with a medium outlet end, a valve seat is fixedly arranged on the right side of the interior of the valve body, a valve core is arranged on the valve seat, one end of the valve core, which is far away from the valve seat, is fixed with a guide rod, the guide rod sequentially passes through guide holes formed in a front guide seat and a rear guide seat, a driving piece is welded and fixed on the guide rod, the left side of the driving piece is welded and fixed with a damping cylinder, and the damping cylinder is elastically connected with the damping seat through a spring;

the valve cavity and the damping cavity are respectively arranged in the valve body, the front guide seat is fixedly arranged in the valve cavity, and the rear guide seat is fixedly arranged in the damping cavity.

Preferably, the valve core is of a hemispherical structure made of rubber materials, the right side of the valve core is provided with a stress groove, the left side of the valve core is provided with a digging groove, the transverse section of the stress groove is in a C-shaped arrangement, and the transverse section of the digging groove is in a rectangular arrangement.

Preferably, four groups of guide rods are uniformly and fixedly arranged on the left side surface of the valve core, the guide rods are subjected to limit installation through a front guide seat and a rear guide seat which are arranged in parallel, and meanwhile, the valve core is in a horizontal transverse moving structure inside the valve body.

Preferably, the valve core is separated from the inner medium inlet end, the medium outlet end, the valve cavity and the damping cavity of the valve seat and is in a communication state, and the transverse section of the damping cavity is in a dovetail shape.

Preferably, the surface of the front guide seat is provided with evacuation ports, the section of the evacuation ports positioned in the middle of the front guide seat is isosceles trapezoid, and simultaneously, the evacuation ports positioned on the outer side of the surface of the front guide seat are four groups and are all C-shaped, and the middle and outer sides of the surface of the rear guide seat are provided with circulation ports.

Preferably, the damping seat is installed on the damping cavity inner wall through the connecting seat, and damping seat and damping section of thick bamboo size looks adaptation, and the guide bar that damping section of thick bamboo set up through the inner wall simultaneously is pegged graft in the guide way that damping seat outside surface was seted up to the guide bar and guide way are trapezoidal setting.

Compared with the prior art, the utility model has the beneficial effects that:

the gas is impacted on the valve core from the medium inlet end, at the moment, the spring is compressed through four groups of guide rods, the valve seat and the valve core are separated, the gas can sequentially pass through the valve cavity, the damping cavity and the medium outlet end, and when no gas flows in the pipeline, the spring is reset to rebound, and the valve seat and the valve core are driven to be closed, so that the purpose of unidirectional transmission of the valve body is realized;

the main components of the valve body comprise a valve seat, a valve core and two groups of guide seats, and the valve has a simple structure, does not need to carry out multilayer automatic expansion and positioning control, can be suitable for any installation occasion, and is not easy to damage.

Drawings

FIG. 1 is a schematic elevational view of the structure of the present utility model;

FIG. 2 is a schematic view of section A-A of FIG. 1, which is a structural diagram of the present utility model;

FIG. 3 is a schematic view of the connection structure of the damping cylinder, spring and damping seat of the structure of the utility model;

FIG. 4 is a schematic view of section B-B of FIG. 3, which is a structural diagram of the present utility model;

FIG. 5 is a schematic view of the check valve in the working state.

Reference numerals in the drawings: 1. a valve body; 2. a media inlet end; 3. a valve seat; 4. a valve core; 5. a guide rod; 6. a front guide seat; 61. an evacuation port; 7. a driving plate; 8. a damping cylinder; 9. a spring; 10. a damping seat; 11. a rear guide seat; 111. a flow port; 12. a medium outlet end; 13. a valve cavity; 14. damping cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, the utility model provides a pneumatic check valve capable of preventing squeaking, which comprises a valve body 1, wherein one end of the valve body 1 is provided with a medium inlet end 2, the other end of the valve body 1 is provided with a medium outlet end 12, a valve seat 3 is fixedly arranged on the right side inside the valve body 1, a valve core 4 is arranged on the valve seat 3, one end of the valve core 4 far away from the valve seat 3 is fixedly connected with a guide rod 5, the guide rod 5 sequentially passes through guide holes formed in a front guide seat 6 and a rear guide seat 11, a driving piece 7 is welded and fixed on the guide rod 5, a damping cylinder 8 is welded and fixed on the left side of the driving piece 7, and meanwhile, the damping cylinder 8 and the damping seat 10 are elastically connected through a spring 9;

the valve cavity 13 and the damping cavity 14 are respectively arranged in the valve body 1, the front guide seat 6 is fixedly arranged in the valve cavity 13, and the rear guide seat 11 is fixedly arranged in the damping cavity 14.

Working principle: when the valve is used, gas impacts the valve core 4 from the medium inlet end 2, at the moment, the four groups of guide rods 5 are used for compressing the spring 9, the valve seat 3 and the valve core 4 are separated, the gas can sequentially pass through the valve cavity 13, the damping cavity 14 and the medium outlet end 12, and when no gas flows in the pipeline, the spring 9 at the moment resets and rebounds to drive the valve seat 3 and the valve core 4 to be closed, so that the purpose of unidirectional transmission of the valve body 1 is realized;

the main components of the valve body 1 comprise a valve seat 3, a valve core 4 and two groups of guide seats, and the valve has a simple structure, does not need to carry out multilayer automatic expansion and positioning control, can be suitable for any installation occasion, and is not easy to damage.

As a preferred embodiment, the valve core 4 is a hemispherical structure made of rubber, the right side of the valve core 4 is provided with a stress groove, the left side of the valve core 4 is provided with a hollow groove, the transverse section of the stress groove is in a C shape, and the transverse section of the hollow groove is in a rectangular shape.

As shown in fig. 1: the right side of the valve core 4 is provided with a stress groove which is opposite to the medium inlet end 2, so that the gas medium is impacted in the stress groove, the acting force is concentrated at the center of the right side of the valve core 4 as much as possible, and the valve core 4 is more rapidly opened.

As a preferred embodiment, four groups of guide rods 5 are uniformly and fixedly arranged on the left side surface of the valve core 4, the guide rods 5 are subjected to limit installation through a front guide seat 6 and a rear guide seat 11 which are arranged in parallel, and meanwhile, the valve core 4 is in a horizontal transverse moving structure inside the valve body 1.

As shown in fig. 1-4: four groups of guide rods 5 are uniformly and fixedly arranged on the left side surface of the valve core 4, when the valve core 4 transversely moves, the four groups of guide rods 5 are inserted into guide holes formed in the rear guide seat 11 and the front guide seat 6, the valve core 4 transversely moving can be limited and guided, vibration of the valve core 4 in the transverse movement process is avoided, and the howling phenomenon caused by vibration of the valve core 4 can be avoided.

As a preferred embodiment, the valve core 4 is separated from the inner medium inlet end 2, the medium outlet end 12, the valve cavity 13 and the damping cavity 14 of the valve seat 3, and the transverse section of the damping cavity 14 is in a dovetail shape.

As shown in fig. 3: the spring 9 is arranged in the damping cylinder 8 and the damping seat 10, and the spring 9 is wrapped through the damping cylinder 8 and the damping seat 10, so that the spring 9 cannot vibrate when media circulate at a high speed, and the phenomenon of howling caused by vibration of the spring 9 is avoided.

As a preferred embodiment, the surface of the front guide seat 6 is provided with the evacuation ports 61, the section of the evacuation ports 61 located in the middle of the front guide seat 6 is isosceles trapezoid, meanwhile, the evacuation ports 61 located on the outer side of the surface of the front guide seat 6 are four groups and are all in a shape of C, and the middle and outer sides of the surface of the rear guide seat 11 are provided with the circulation ports 111.

As a preferred embodiment, the damping seat 10 is installed on the inner wall of the damping cavity 14 through a connecting seat, and the damping seat 10 is matched with the damping cylinder 8 in size, meanwhile, the damping cylinder 8 is inserted into a guide groove formed in the outer side surface of the damping seat 10 through a guide strip arranged on the inner wall, and the guide strip and the guide groove are both arranged in a trapezoid shape.

The valve chamber 13, the damper chamber 14 and the medium outlet 12 are communicated with each other through a flow port 111 and an evacuation port 61.

The two sides of the valve body 1 can be connected with the fixed connecting flange in a screwed manner, and the device is convenient to install on a pipeline needing unidirectional medium circulation through the flange.

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

Claims

1. The utility model provides a prevent pneumatic check valve of squeaking, includes valve body (1), medium advance end (2) are seted up to one end of valve body (1), and medium play end (12) are seted up to the other end of valve body (1), its characterized in that: the valve body (1) is characterized in that a valve seat (3) is fixedly arranged on the right side of the interior of the valve body (1), a valve core (4) is arranged on the valve seat (3), one end, far away from the valve seat (3), of the valve core (4) is fixed with a guide rod (5), the guide rod (5) sequentially penetrates through guide holes formed in a front guide seat (6) and a rear guide seat (11), a driving piece (7) is welded and fixed on the guide rod (5), a damping cylinder (8) is welded and fixed on the left side of the driving piece (7), and meanwhile, the damping cylinder (8) is elastically connected with a damping seat (10) through a spring (9);

a valve cavity (13) and a damping cavity (14) are respectively formed in the valve body (1), a front guide seat (6) is fixedly arranged in the valve cavity (13), and a rear guide seat (11) is fixedly arranged in the damping cavity (14).

2. An anti-squeal pneumatic check valve as defined in claim 1 wherein: the valve core (4) is of a hemispherical structure made of rubber materials, the right side of the valve core (4) is provided with a stress groove, the left side of the valve core (4) is provided with a digging groove, the transverse section of the stress groove is in a C-shaped arrangement, and the transverse section of the digging groove is in a rectangular arrangement.

3. An anti-squeal pneumatic check valve as defined in claim 1 wherein: four groups of guide rods (5) are uniformly and fixedly arranged on the left side surface of the valve core (4), the guide rods (5) are subjected to limit installation through a front guide seat (6) and a rear guide seat (11) which are arranged in parallel, and meanwhile, the valve core (4) is of a horizontal transverse moving structure inside the valve body (1).

4. An anti-squeal pneumatic check valve as defined in claim 1 wherein: the valve core (4) is separated from the inner medium inlet end (2), the medium outlet end (12), the valve cavity (13) and the damping cavity (14) of the valve seat (3) and is in a communication state, and the transverse section of the damping cavity (14) is in a dovetail shape.

5. An anti-squeal pneumatic check valve as defined in claim 1 wherein: the surface of the front guide seat (6) is provided with an evacuation port (61), the section of the evacuation port (61) positioned in the middle of the front guide seat (6) is isosceles trapezoid, simultaneously, the evacuation ports (61) positioned on the outer side of the surface of the front guide seat (6) are arranged into four groups and are all C-shaped, and the middle and the outer sides of the surface of the rear guide seat (11) are provided with circulation ports (111).

6. An anti-squeal pneumatic check valve as defined in claim 1 wherein: the damping seat (10) is installed on the inner wall of the damping cavity (14) through the connecting seat, the damping seat (10) is matched with the damping cylinder (8) in size, meanwhile, the damping cylinder (8) is inserted into a guide groove formed in the outer side surface of the damping seat (10) through a guide strip arranged on the inner wall, and the guide strip and the guide groove are all trapezoidal.