CN208967123U - High-pressure pneumatic check valve - Google Patents

Abstract

The utility model discloses a kind of high-pressure pneumatic check valves, its spool includes the guide part being slidably matched with second sidewall and the seal boss that can close air inlet, the spring for making spool hold out against first end face is equipped between valve body and the bottom surface of seal boss, the side of seal boss is equipped with several gas passages, lead to the first side wall for one end of gas passage, and the other end of gas passage is communicated with gas outlet.The utility model has the advantages that being face contact between the top surface and first end face of seal boss, sealing effect is good, and spool is wear-resisting and high reliablity, is suitable for the application demand of high-frequency and high-voltage.The utility model relates to check valve fields.

Description

High-pressure pneumatic check valve

Technical field

The utility model relates to check valve fields, in particular to high-pressure pneumatic check valve.

Background technique

Check valve is also known as check-valves or non-return valve, is what fluid can only be flowed along import to export direction, and can not be flowed back Device.Present check valve is roughly divided into three kinds: gravity type, spring and solenoid valve.

Spring: fluid from bottom to top, by pressure jacks up spring controlled spool, and after pressure disappears, spring force is by valve Core pressure, sealing liquid are flow backwards.It is usually used in the lesser check-valves of latus rectum.

Gravity type: it is similar with spring, it is closed by the self gravity of spool, prevents from flowing backwards.

Electrodynamic type: by electrical control, the up and down motion of Lai Shixian spool, and then conducting and closing are controlled, realization prevents The effect of refluence.

Above-mentioned several check valves have respective disadvantage: gravity-held check valve, only rely on the self gravity of spool as dynamic Power reacts slow motion and unreliable；Compared to gravity-held check valve, the reaction of spring check valve is done fastly more, and more reliable, But after using spring, it is easy to happen blocking, and spring has abrasion, needs to regularly replace；Electrodynamic type check valve, can The shortcomings that overcoming gravity type and spring check valve, but the higher operating costs of electrodynamic type check valve, and use electric-controlled System, functional reliability will be lower than the check valve of Purely mechanical.

In the prior art, Pneumatic check valve operating frequency is higher, needs faster reaction speed, generally selection spring Structure.Check valve open and close is completed by spool, and existing spool material is mostly that metal or metal add rubber, and technological deficiency exists In: when check valve frequent movement, spool is easy to wear, and spool and wall friction heat, there are stuck risks；Use rubber The Pneumatic check valve of sealing ring, sealing ring are easy frequently to be squeezed and damaged；The check valve sealed firmly by taper valve core, Its structure lacks sealing wear compensation, and sealing effect is poor.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of high-pressure pneumatic check valves, and sealing effect is good, valve Core is wear-resisting and high reliablity, is suitable for the application demand of high-frequency and high-voltage.

Used technical solution to solve above-mentioned technical problem: a kind of high-pressure pneumatic check valve, including being equipped with inner cavity Valve body and the spool being located in body cavity, inner cavity include first end face, second end face and are located at first end face and second end face Between side wall, first end face be equipped with air inlet, second end face be equipped with gas outlet, side wall includes connecting with first end face The first side wall and the sliding of bootable spool second sidewall, spool includes the guide part being slidably matched with second sidewall and can The seal boss for closing air inlet is equipped with the spring for making spool hold out against first end face between valve body and the bottom surface of seal boss, close Seal boss side be equipped with several gas passages, lead to the first side wall for one end of gas passage, the other end of gas passage with go out Port communicates.

As an improvement, the material of spool is engineering plastics.

As an improvement, valve body is revolving body, air inlet and air outlet are respectively provided at the both ends of valve body.

As an improvement, valve body includes upper shell and lower shell, air inlet and first end face are located at the bottom surface of upper shell, the One side wall and second sidewall are located at the inside of lower shell, and the lower part of upper shell is equipped with external screw thread, sets on the first side wall of lower shell There is internal screw thread, it is detachably connected by screw thread between upper shell and lower shell.

As an improvement, guide part is cylindrical shape, seal boss is truncated cone-shaped.

As an improvement, the quantity of gas passage is four, one end of four gas passages is mutually passed through and is connected to gas outlet.

As an improvement, valve body is stainless steel material.

As an improvement, spring is stainless steel material.

The utility model has the advantages that being face contact between the top surface and first end face of seal boss, sealing effect is good, and spool is wear-resisting And high reliablity, it is suitable for the application demand of high-frequency and high-voltage.

Detailed description of the invention

The utility model is described further with reference to the accompanying drawing:

Fig. 1 is the decomposition diagram of the utility model embodiment；

Fig. 2 is the cross-sectional view of Fig. 1 of the utility model embodiment；

Fig. 3 is the cross-sectional view of the assembled state of the utility model embodiment；

Fig. 4 is a quarter cross-sectional view of the spool of the utility model embodiment；

Fig. 5 is the structural schematic diagram of the gas passage of the utility model embodiment；

The noun and label that embodiment and Figure of description are related to include: valve body 1, spool 2, first end face 3, second end Face 4, air inlet 5, gas outlet 6, the first side wall 7, second sidewall 8, guide part 9, seal boss 10, spring 11, gas passage 12, upper shell 13, lower shell 14.

Specific embodiment

Referring to figs. 1 to 5, a kind of high-pressure pneumatic check valve including the valve body 1 equipped with inner cavity and is located in 1 inner cavity of valve body Spool 2, inner cavity include first end face 3, second end face 4 and the side wall being located between first end face 3 and second end face 4, first end Face 3 be equipped with air inlet 5, second end face 4 be equipped with gas outlet 6, side wall include the first side wall 7 to connect with first end face 3 and The second sidewall 8 that bootable spool 2 slides, spool 2 include the guide part 9 being slidably matched with second sidewall 8 and can close air inlet Mouthfuls 5 seal boss 10, the top surface of seal boss 10, which is equipped with, separably contacts with first end face 3 and seals the of air inlet 5 Three end faces are equipped with the spring 11 for making spool 2 hold out against first end face 3, seal boss between valve body 1 and the bottom surface of seal boss 10 10 side is equipped with several gas passages 12, and lead to the first side wall 7 for one end of gas passage 12, the other end of gas passage 12 It is communicated with gas outlet 6.It is face contact between the top surface and first end face 3 of seal boss 10, sealing effect is good, and spool 2 is wear-resisting And high reliablity, it is suitable for the application demand of high-frequency and high-voltage.

In order to further increase the wearability of spool 2, the material of spool 2 is engineering plastics.Engineering plastics material will not give birth to Rust can avoid rust bits pollution Pneumatic check valve and gas pipeline that iron material matter generates, be conducive to improve the reliable of pneumatic system Property.

For the ease of manufacture, assembly and use, valve body 1 is revolving body, and air inlet 5 and gas outlet 6 are respectively provided at valve body 1 Both ends, guide part 9 be cylindrical shape, seal boss 10 be truncated cone-shaped.

For the ease of assembling and repairing, valve body 1 includes upper shell 13 and lower shell 14, and air inlet 5 and first end face 3 are set In the bottom surface of upper shell 13, the first side wall 7 and second sidewall 8 are located at the inside of lower shell 14, and the lower part of upper shell 13 is equipped with outer The first side wall 7 of screw thread, lower shell 14 is equipped with internal screw thread, between upper shell 13 and lower shell 14 removably by screw thread Connection.14 split settings of upper shell 13 and lower shell, can flexibly assemble and disassemble, and be conducive to the spool 2 of replacement abrasion and the spring of failure 11。

In order to improve the ventilation capacity of spool 2, the quantity of gas passage 12 is four, one end phase of four gas passages It passes through and is connected to gas outlet 6.Four gas passages 12 are uniformly circumferentially arranged in the side of seal boss 10.

In order to further increase the reliability of check valve, valve body 1 and spring 11 are stainless steel material, can be corrosion-resistant, can be kept away The rust bits pollution Pneumatic check valve and gas pipeline for exempting from the generation of iron material matter, are conducive to the reliability for improving pneumatic system.

The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to Above embodiment, technical field those of ordinary skill within the scope of knowledge, this reality can also not departed from With under the premise of novel objective, various changes can be made.

Claims (8)

1. a kind of high-pressure pneumatic check valve, it is characterised in that: including being equipped with the valve body of inner cavity and the spool being located in body cavity, Inner cavity includes first end face, second end face and sets side wall between the first end face and the second end face, first end face be equipped with into Port, second end face are equipped with gas outlet, and side wall includes that the first side wall to connect with first end face and bootable spool slide Second sidewall, spool include the guide part being slidably matched with second sidewall and the seal boss that can close air inlet, valve body with it is close The spring for being equipped between the bottom surface of boss and spool being made to hold out against first end face is sealed, the side of seal boss is equipped with several gas passages, Lead to the first side wall for one end of gas passage, and the other end of gas passage is communicated with gas outlet.

2. high-pressure pneumatic check valve according to claim 1, it is characterised in that: the material of the spool is engineering plastics.

3. high-pressure pneumatic check valve according to claim 2, it is characterised in that: the valve body be revolving body, air inlet and Gas outlet is respectively provided at the both ends of valve body.

4. high-pressure pneumatic check valve according to claim 3, it is characterised in that: the valve body includes upper shell and lower cylinder Body, the air inlet and first end face are located at the bottom surface of upper shell, and the first side wall and second sidewall are located at the interior of lower shell Side, the lower part of upper shell are equipped with external screw thread, and the first side wall of lower shell is equipped with internal screw thread, passes through between upper shell and lower shell Screw thread is detachably connected.

5. high-pressure pneumatic check valve according to claim 4, it is characterised in that: the guide part is cylindrical shape, is sealed convex Platform is truncated cone-shaped.

6. according to claim 1 to high-pressure pneumatic check valve described in 5 any one, it is characterised in that: the gas passage Quantity is four, and one end of four gas passages is mutually passed through and is connected to gas outlet.

7. according to claim 1 to high-pressure pneumatic check valve described in 5 any one, it is characterised in that: the valve body is stainless Steel material.

8. according to claim 1 to high-pressure pneumatic check valve described in 5 any one, it is characterised in that: the spring is stainless Steel material.