CN207470857U - Check valve and vehicle - Google Patents

Abstract

The utility model provides a kind of check valve and vehicle, there is technical issues that in use to solve existing check valve.The check valve includes housing unit and valve module living, and valve chamber, the first port, the second port, entrance, outlet and medium channel are provided on housing unit, and valve chamber is arranged at intervals with medium channel；Wherein, the first port of entrance, the first port and medium channel is sequentially connected；First port and the second port are connect with valve chamber and the first port and the second port are oppositely arranged along the length direction of valve chamber, valve module living is plugged in valve chamber and can be moved back and forth between the first port and the second port, for blocking or opening the first port to cut off or be connected the connection between entrance and the first port of medium channel；Outlet, the second port connect simultaneously with the second port three of medium channel, so as to which the region being located in valve chamber between valve module and the second port living is forced to form negative pressure during outlet high-speed jet by Involving velocity.

Description

Check valve and vehicle

Technical field

The utility model is related to valve control technical field, more particularly, to a kind of check valve and vehicle.

Background technology

Check valve refers to by medium flowing in itself and the valve class of automatic shutter flap, only allows medium directed flow And medium opposite direction flowing is prevented, belong to a kind of automatic valve class, main function is to prevent medium refluence and medium from releasing.Its In, cooling gas check valve field of aerospace, petrochemical industry fluid piping system in have a wide range of applications, principle For：When one-way valve inlet pressure opens pressure higher than it, check valve orientation conducting, medium flow to outlet by one-way valve inlet； When pipe-line system pressure closes pressure less than it, closed check valve, the circulation of medium is cut off.

Check valve of the prior art is straight check valve, the central axes of the conduction path of straight check valve along valve body Extend, the resetting spring and spool arranged along its central axes is installed in valve body.When one-way valve inlet pressure is higher than opening pressure When, spool pushes resetting spring to force its rapid desufflation, and valve body inner gateway is switched on；When one-way valve inlet pressure is pressed less than closing During power, resetting spring quickly springs back and pushes valve core reset, and valve body inner gateway is cut off.In the above process, pipe-line system pressure Unstable, the variation tendency of spring is unstable, and especially under small flow rate, one-way valve inlet insufficient pressure is so that check valve is complete Full conducting, spool and spring generate multiple reciprocating motion during the dynamic unbalance of small pressure difference, since spring is frequent and It is rapidly reciprocal, check valve is caused chatter phenomenon often occur, this kind of chatter is sometimes up to as long as a few hours.Due to chatter phenomenon Presence, the blower operations of pipe-line system are difficult to, and spring accelerates fatigue failure in multiple move back and forth, and spool is multiple The leakproofness seriously affected therebetween is constantly impacted in reciprocating motion with valve body.Especially in field of aerospace, vehicle Pressurizing transmission system in Pneumatic check valve easily there is coupling chatter, couple chatter caused by noise can influence other and be The normal work of system, also, leakage will result directly in the failure of system operation task caused by chatter.

From the foregoing, it will be observed that existing check valve, in use there are chatter phenomenon, the presence of the chatter leads to check valve Working performance is poor, service life is short, and then various problems occurs in the pipe-line system where leading to check valve.

Utility model content

The purpose of this utility model is to provide a kind of check valves, and to solve existing check valve, presence is shaken in use The technical issues of quivering.

The utility model provides a kind of check valve, which includes housing unit and valve module living；

Valve chamber, the first port, the second port, entrance, outlet and medium channel, the valve are provided on the housing unit Chamber is arranged at intervals with the medium channel；Wherein,

The first port of the entrance, first port and the medium channel is sequentially connected；First port and Second port is connect with the valve chamber and the length direction of first port and second port along the valve chamber It is oppositely arranged, the valve module living is plugged in the valve chamber and can be past between first port and second port Multiple movement, for blocking or opening first port to cut off or be connected the first port of the entrance and the medium channel Between connection；

It is described outlet, second port connected simultaneously with the second port three of the medium channel so that it is described go out The area in the valve chamber between the valve module living and second port is forced during mouth high-speed jet by Involving velocity Domain forms negative pressure.

Further, second port is damping hole.

Further, the valve module living is included by second port to the sequentially connected reset bullet of first port Spring and spool, the spool have sealed condition and conducting state；

When the pressure medium of the entrance is more than the elastic force of the resetting spring, the spool is switched to by sealed condition Conducting state simultaneously forces the resetting spring compression to store elastic potential energy；

When the pressure medium of the entrance is less than the elastic force of the resetting spring, the resetting spring drives the spool Sealed condition is switched to by conducting state.

Further, the spool include core and closeouts, the resetting spring, the core and the closeouts according to Secondary connection；

When the pressure medium of the entrance is more than the elastic force of the resetting spring, the closeouts are switched by sealed condition The resetting spring compression is forced to store elastic potential energy for conducting state and by the core；

When the pressure medium of the entrance is less than the elastic force of the resetting spring, the resetting spring passes through the core The closeouts is driven to be switched to sealed condition by conducting state.

Further, offer first inserting groove opposite with first port on the core, the closeouts with The first inserting groove grafting.

Further, second inserting groove opposite with second port, the reset bullet are further opened on the core One end of spring and the inner wall grafting of the valve chamber, the other end of the resetting spring and the second inserting groove grafting.

Further, second port is coaxially disposed with the resetting spring.

Further, the housing unit includes main casing, cylinder barrel and gas inlet shell；

The main casing is fixedly connected with the gas inlet shell and is formed with accommodation space therebetween, and the entrance is arranged on institute It states on gas inlet shell, the outlet is arranged on the main casing；

The cylinder barrel is located in the accommodation space, and the inside of the cylinder barrel forms the valve chamber；The entrance, the cylinder Cylinder and the outlet are set gradually, and the region of the close nozzle of the cylinder barrel is provided with communication port, and the nozzle is connected with described First port is collectively formed in mouth, and second port is arranged on the bottom surface of the cylinder barrel；At least part of the cylinder barrel Peripheral surface and the inner wall of the accommodation space are arranged at intervals to form the medium channel.

Further, the side of the cylinder barrel is fixedly connected with the inner wall of the accommodation space, the opposite side of the cylinder barrel It is arranged at intervals to form the medium channel with the inner wall of the accommodation space.

Check valve provided by the utility model includes housing unit and valve module living, wherein, valve is provided on housing unit Chamber, the first port, the second port, entrance, outlet and medium channel, valve chamber are arranged at intervals with medium channel；Wherein, entrance, The first port of one port and medium channel is sequentially connected；First port and the second port connect with valve chamber and the first port and Second port is oppositely arranged along the length direction of valve chamber, and valve module living is plugged in valve chamber and can be logical in the first port and second It is moved back and forth between mouthful, for blocking or opening the first port to cut off or be connected between entrance and the first port of medium channel Connection；Wherein, outlet, the second port connect simultaneously with the second port three of medium channel, so that during outlet high-speed jet The region being located in valve chamber between valve module and the second port living is forced to form negative pressure by Involving velocity.

Specifically, after valve module living opens the first port, entrance is connected with medium channel by the first port, at this point, Entrance, the first port, medium channel and outlet, medium are passed sequentially through the first end of the first port and medium channel by entrance Mouthful, when between the second port of medium arrival medium channel, the second port, medium has become high-speed jet state, this is at a high speed Jet stream reaches outlet and is sprayed at a high speed in outlet；Due to being between the second port of medium channel, the second port and outlet three Normal open state, therefore, medium flow direction are flowed in valve chamber by the second port while outlet and lived between valve module and the second port Region, which can be referred to as back pressure cavity.High speed ejection medium is exported, due to the Involving velocity of high-speed Medium, medium channel Second port, the second port and the outlet region that crosses of three form volume and inhale flowing, since volume inhales the presence of flowing, second is logical The medium of mouthful peripheral region is sucked away, including the medium in back pressure cavity, the pressure in back pressure cavity be forced to be down to outlet pressure with Under, the negative pressure region that pressure is less than outlet pressure is formed, the pressure of back pressure cavity is effectively reduced, in this way, in one-way valve inlet Under the Involving velocity of pressure medium and one-way valved outlet medium, the pressure difference at valve module both ends living is larger, has been led in entire flow path In the case of logical, valve module living is maintained at continual and steady state, also, the stabilization time of valve module living and outlet high-speed jet Time be consistent, therefore, which can keep continual and steady state in the process of work, can ensure check valve Not the phenomenon that chatter does not occur during the work time.

Compared with the prior art, valve chamber and medium channel are arranged at intervals by check valve provided by the utility model, medium warp It is reached and exported from entrance by the medium channel, be no longer pass through spool, valve chamber is provided with the second port close to one end of outlet, utilizes Medium Involving velocity for generating when exit forms high-speed jet increases the pressure difference at valve module both ends living, forces valve module living A stable state is kept in the case where medium channel is connected, and then prevents chatter phenomenon from occurring.

The another object of the utility model, which also resides in, provides a kind of vehicle, which includes as described above unidirectional Valve.

The advantageous effect of above-mentioned vehicle compared with the prior art is same as above-mentioned check valve compared with the prior art beneficial Effect, details are not described herein again.

Description of the drawings

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness Under the premise of labour, other attached drawings are can also be obtained according to these attached drawings.

Fig. 1 is the schematic diagram of check valve that the utility model embodiment provides；

Fig. 2 is the schematic diagram of housing unit that the utility model embodiment provides；

Fig. 3 is the schematic diagram of work valve module that the utility model embodiment provides；

Fig. 4 is the schematic diagram of core that the utility model embodiment provides.

Reference numeral：

10- housing units；20- work valve modules；101- valve chambers；The first ports of 102-；The second ports of 103-；104- entrances； 105- is exported；106- medium channels；107- main casings；108- cylinder barrels；109- gas inlet shells；201- resetting springs；202- cores；203- Closeouts；The first port of 1061- medium channels；The second port of 1062- medium channels；The first inserting grooves of 2021-；2022- Second inserting groove.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality Novel protected range.

In the description of the present invention, it should be noted that term " " center ", " on ", " under ", it is "left", "right", " perpendicular Directly ", the orientation of the instructions such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only The utility model must have specific with the device or element for simplifying description rather than instruction or hint meaning for ease of description Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.In addition, term " the One ", " second ", " third " are only used for description purpose, and it is not intended that instruction or hint relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally Connection；Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary, It can be the connection inside two elements.For the ordinary skill in the art, can above-mentioned art be understood with concrete condition Concrete meaning of the language in the utility model.

Fig. 1 is the schematic diagram of check valve that the utility model embodiment provides, and Fig. 2 is what the utility model embodiment provided The schematic diagram of housing unit, Fig. 3 are the schematic diagram of work valve module that the utility model embodiment provides.

As shown in Figure 1 to Figure 3, the check valve that the utility model embodiment provides includes housing unit 10 and valve module living 20；Valve chamber 101, the first port 102, the second port 103, entrance 104, outlet 105 and medium is provided on housing unit 10 to lead to Road 106, wherein, valve chamber 101 is arranged at intervals with medium channel 106；Wherein, entrance 104, the first port 102 and medium channel First port 1061 is sequentially connected；First port 102 and the second port 103 are connect with valve chamber 101 and the first port 102 and Two ports 103 are oppositely arranged along the length direction of valve chamber 101, and valve module 20 living is plugged in valve chamber 101 and can be logical first Mouthfuls 102 and second move back and forth between port 103, for block or open the first port 102 with cut off or be connected entrance 104 with Connection between the first port 1061 of medium channel；Export the second port 1062 of the 105, second port 103 and medium channel Three connects simultaneously, is located at valve module 20 living and the in valve chamber 101 so as to be forced during 105 high-speed jet of outlet by Involving velocity Region between two ports 103 forms negative pressure.

In use, after valve module 20 living opens the first port 102, entrance 104 passes through the first port with medium channel 106 102 connections, at this point, entrance 104,105 connection of the first port 102, medium channel 106 and outlet, medium are led to successively by entrance 104 The first port 1061 of the first port 102 and medium channel is crossed, when the second port 1062, second that medium reaches medium channel is logical When between mouth 103, medium has become high-speed jet state, which reaches outlet 105 simultaneously in the injection at a high speed of outlet 105； Due to being normal open state between the second port 1062 of medium channel, the second port 103 and 105 threes of outlet, medium flow field It is flowed to and is located in valve chamber 101 between 20 and second port 103 of valve module living by the second port 103 while to outlet 105 Region, the region can be referred to as back pressure cavity.105 high speed ejection mediums are exported, due to the Involving velocity of high-speed Medium, medium channel Second port 1062, the second port 103 and the outlet region that crosses of 105 threes form volume and inhale flowing, since volume inhales flowing In the presence of the medium of 103 peripheral region of the second port is sucked away, and including the medium in back pressure cavity, the pressure in back pressure cavity is forced The pressure of outlet 105 is down to hereinafter, forming negative pressure region of the pressure less than 105 pressure of outlet, effectively reduces the pressure of back pressure cavity Power, in this way, under the Involving velocity of the medium of the outlet 105 of the pressure medium and check valve of the entrance 104 of check valve, valve group living The pressure difference at 20 both ends of part is larger, and in the case where entire flow path has been turned on, valve module 20 living is maintained at continual and steady state, Also, the stabilization time of valve module 20 living and the time of 105 high-speed jets of outlet are consistent, and therefore, which is working During can keep continual and steady state, can ensure the phenomenon that chatter does not occur during the work time for check valve.

Compared with the prior art, valve chamber 101 and medium channel 106 are arranged at intervals by check valve provided by the utility model, Medium reaches outlet 105 via the medium channel 106 from entrance 104, is no longer pass through valve module 20 living, valve chamber 101 is close to outlet 105 one end is provided with the second port 103, using medium export form high-speed jet at 105 when the Involving velocity that generates come Increase the pressure difference at 20 both ends of valve module living, valve module 20 living is forced to keep a stabilization in the case where medium channel 106 is connected State, and then prevent chatter phenomenon occur.

Wherein, Involving velocity is also known as suction effect, and referring to utilize increases fluid flow rate and generate to ambient gas or liquid Sucking effect.According to the relationship of flow velocity and pressure, when the velocity of medium increase in somewhere, the medium pressure at this just accordingly subtracts It is small, when medium pressure is decreased below the pressure of surrounding medium, the medium of surrounding be sucked and to flowing at this, referred to as suction Effect.

In the present embodiment, housing unit 10 includes main casing 107, cylinder barrel 108 and gas inlet shell 109, wherein, gas inlet shell 109 can For air inlet mouth structure, main casing 107 is threadably secured with gas inlet shell 109 connect and is formed with therebetween accommodation space, entrance 104 are arranged on gas inlet shell 109, and entrance 104 has the length of setting in order to directly be connect with exterior line, outlet 105 It is arranged on main casing 107, and export 105 there is the length of setting in order to directly connect with exterior line；Cylinder barrel 108, which is located at, to be held It receives in space, the inside of cylinder barrel 108 forms valve chamber 101；Entrance 104, cylinder barrel 108 and outlet 105 are set gradually, cylinder barrel 108 The region of nozzle is provided with communication port (not shown), the first port 102 is collectively formed in the nozzle and the communication port, the Two ports 103 are arranged on the bottom surface of cylinder barrel 108；At least part peripheral surface of cylinder barrel 108 and the inner wall interval of accommodation space are set It puts to form medium channel 106.Specifically, communication port is multiple, and multiple communication ports are arranged at intervals successively along the circumference of cylinder barrel 108, To enable media to enter medium channel by different directions, ensure the good circulation of medium.In the present embodiment, communication port is 4.

In the present embodiment, the side of cylinder barrel 108 is fixedly connected with the inner wall of accommodation space, the opposite side and appearance of cylinder barrel 108 The inner wall in space received is arranged at intervals to form medium channel 106.

In other embodiment, the nozzle of cylinder barrel 108 can be fixedly connected with gas inlet shell 109, in this way, the periphery of cylinder barrel 108 An annular medium channel 106 is formed between face and the inner peripheral surface of accommodation space.

In the present embodiment, valve module 20 living is included by 103 to the first port of the second port, 102 sequentially connected resetting spring 201 and spool, spool has sealed condition and conducting state；Wherein, sealed condition refers to that spool blocks the first port 102 to cut Break the connection between mouth 104 and the first port 1061 of medium channel, conducting state refer to spool open the first port 102 with The connection between entrance 104 and the first port 1061 of medium channel is connected；When the pressure medium of entrance 104 is more than resetting spring During 201 elastic force, spool is switched to conducting state by sealed condition and resetting spring 201 is forced to compress to store elastic potential energy； When the pressure medium of entrance 104 is less than the elastic force of resetting spring 201, resetting spring 201 drives spool to be switched by conducting state For sealed condition.

Wherein, spool includes core 202 and closeouts 203, and resetting spring 201, core 202 and closeouts 203 connect successively It connects；When the pressure medium of entrance 104 is more than the elastic force of resetting spring 201, closeouts 203 are switched to conducting shape by sealed condition State simultaneously passes through core 202 resetting spring 201 is forced to compress to store elastic potential energy；It is resetted when the pressure medium of entrance 104 is less than During the elastic force of spring 201, resetting spring 201 drives closeouts 203 to be switched to sealed condition by conducting state by core 202.

Spool provided in this embodiment includes resetting spring 201 and spool, simple in structure, can simplify entire check valve Internal structure, the core of spool and the inner wall of valve chamber are sealed setting, to ensure the sealing performance of check valve.

The medium of above-mentioned check valve can be gaseous state or liquid, gaseous state is particularly suitable for, suitable for making on aerospace vehicle With.There are many setting forms of above-mentioned second port, and shape, size, position can flexibly be set according to actual needs, this In embodiment, the second port of setting is damping hole, the check valve is made to become a vibration prevention based on air damping principle unidirectional Valve, it is simple in structure, the stability of non-return valve operational system can be improved comprehensively.

Specifically, in non-return valve operational, due to the Involving velocity of high-speed jet, the medium from medium channel is exporting Place, which forms jet stream and then generates volume, inhales flowing, so that the medium of damping hole peripheral region is sucked away under Involving velocity, back pressure The pressure of intracavitary is down to outlet pressure hereinafter, forming certain negative pressure region, effectively reduces the pressure of back pressure cavity, valve module living It is compacted to ensure that check valve steady operation does not tremble, resetting spring is in compressive state at this time；When check valve terminates work When making, due to the damping action of damping hole, the rate of climb of Pressure in Back-pressure Cavity is effectively reduced, ensures that the pressure of back pressure cavity is hindering Change dramatically is not generated under the damping action in Buddhist nun hole, plays damping vibration attenuation function, valve module living is slowly switched to by conducting state Sealed condition, to prevent check valve from chatter occurs.

On the basis of ensureing that chatter does not occur for valve module living, since medium channel and valve chamber are arranged at intervals, it does not interfere with each other, Medium is directly passed through by medium channel, and compared with the prior art, check valve range of flow applicatory is larger, also, medium The component that passes through in the process is few, and flow resistance is small flowing through, and outlet and entrance are set as the slot hole knot with certain length Structure can be applied to be related in each fluid piping system of non-return valve operational, it can be achieved that rapid abutting joint with pipe-line system.

Preferably, the second port 103 is coaxially disposed with the resetting spring 201 in valve module 20 living, and medium is by the second port 103 enter the back pressure cavity between 20 and second port 103 of valve module living, due to the center of the second port 103 and valve module 20 living Corresponding, medium can be equably to the application pressure of valve module 20 living, to further improve the stability of valve module 20 living.

In other embodiment, the axis of the second port is parallel but misaligned with the axis of resetting spring, and the second port can be One or multiple.

Preferably, when the second port is one, the second port is coaxially disposed with resetting spring.

Preferably, when the second port is multiple, multiple second ports are arranged along the radial direction or circumferential setting rule of pressing of cylinder barrel.

Fig. 4 is the schematic diagram of core that the utility model embodiment provides.

As shown in figure 4, in the present embodiment, first inserting groove opposite with the first port 102 is offered on core 202 2021,203 and first inserting groove of closeouts, 2021 grafting, inserting mode causes the dismounting of the check valve to simplify, also, do not make It is made to simplify the structure with other connecting components.

Second inserting groove 2022 opposite with the second port 103, one end of resetting spring 201 are further opened on core 202 With the inner wall grafting of valve chamber 101,2022 grafting of the other end of resetting spring 201 and the second inserting groove, inserting mode causes the list Dismounting to valve is simplified, also, it is made to simplify the structure without using other connecting components.Specifically, in the present embodiment, into It is connected between gas shell 109 and main casing 107 using thread connecting mode, 203 and first inserting groove 2021 of closeouts is connected using screw thread The mode of connecing connects, in order to quickly and easily complete to install or remove.

The another object of the utility model, which also resides in, provides a kind of vehicle, which includes as described above unidirectional Valve.

The advantageous effect of above-mentioned vehicle compared with the prior art is same as above-mentioned check valve compared with the prior art beneficial Effect, details are not described herein again.

Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of check valve, which is characterized in that including housing unit and valve module living；

Be provided with valve chamber, the first port, the second port, entrance, outlet and medium channel on the housing unit, the valve chamber with The medium channel is arranged at intervals；Wherein,

The first port of the entrance, first port and the medium channel is sequentially connected；First port and described Second port is connected with the valve chamber and first port and second port are opposite along the length direction of the valve chamber Setting, the valve module living are plugged in the valve chamber and can back and forth be transported between first port and second port It is dynamic, for blocking or opening first port to cut off or be connected between the entrance and the first port of the medium channel Connection；

The outlet, second port connect simultaneously with the second port three of the medium channel, so that the outlet is high The region shape in the valve chamber between the valve module living and second port is forced by Involving velocity during rapid fire stream Into negative pressure.

2. check valve according to claim 1, which is characterized in that second port is damping hole.

3. check valve according to claim 1, which is characterized in that the valve module living is included by second port to institute The sequentially connected resetting spring of the first port and spool are stated, the spool has sealed condition and conducting state；

When the pressure medium of the entrance is more than the elastic force of the resetting spring, the spool is switched to conducting by sealed condition State simultaneously forces the resetting spring compression to store elastic potential energy；

When the entrance pressure medium is less than the elastic force of the resetting spring, the resetting spring drives the spool by being connected State is switched to sealed condition.

4. check valve according to claim 3, which is characterized in that the spool includes core and closeouts, the reset Spring, the core and the closeouts are sequentially connected；

When the pressure medium of the entrance is more than the elastic force of the resetting spring, the closeouts are switched to by sealed condition to be led Logical state simultaneously forces the resetting spring compression to store elastic potential energy by the core；

When the pressure medium of the entrance is less than the elastic force of the resetting spring, the resetting spring is driven by the core The closeouts are switched to sealed condition by conducting state.

5. check valve according to claim 4, which is characterized in that offered on the core opposite with first port The first inserting groove, the closeouts and the first inserting groove grafting.

6. check valve according to claim 5, which is characterized in that be further opened on the core and the second port phase To the second inserting groove, the inner wall grafting of one end of the resetting spring and the valve chamber, the other end of the resetting spring with The second inserting groove grafting.

7. check valve according to claim 6, which is characterized in that second port is coaxially set with the resetting spring It puts.

8. check valve according to claim 1, which is characterized in that the housing unit includes main casing, cylinder barrel and gas inlet shell；

The main casing is fixedly connected with the gas inlet shell and is formed with accommodation space therebetween, the entrance be arranged on it is described into On gas shell, the outlet is arranged on the main casing；

The cylinder barrel is located in the accommodation space, and the inside of the cylinder barrel forms the valve chamber；The entrance, the cylinder barrel and The outlet is set gradually, and the region of the close nozzle of the cylinder barrel is provided with communication port, and the nozzle and the communication port are total to With first port is formed, second port is arranged on the bottom surface of the cylinder barrel；

At least part peripheral surface of the cylinder barrel is arranged at intervals to form the medium channel with the inner wall of the accommodation space.

9. check valve according to claim 8, which is characterized in that the side of the cylinder barrel and the inner wall of the accommodation space It is fixedly connected, the opposite side of the cylinder barrel and the inner wall of the accommodation space are arranged at intervals to form the medium channel.

10. a kind of vehicle, which is characterized in that including check valve as claimed in any one of claims 1-9 wherein.