CN215635187U

CN215635187U - Residual pressure breather valve

Info

Publication number: CN215635187U
Application number: CN202121789616.3U
Authority: CN
Inventors: 王延桥
Original assignee: Shandong Taizhan Mechanical And Electrical Technology Co ltd
Current assignee: Shandong Taizhan Mechanical And Electrical Technology Co ltd
Priority date: 2021-08-03
Filing date: 2021-08-03
Publication date: 2022-01-25
Anticipated expiration: 2031-08-03

Abstract

The utility model discloses a residual pressure breather valve, which belongs to the technical field of vehicle accessories and comprises a valve shell, and is characterized in that: first valve pocket and second valve pocket have been seted up in the valve casing, be equipped with first air cock and second air cock on the valve casing, first air cock is linked together with first valve pocket, the second air cock is linked together with the second valve pocket, be equipped with first valve mouth and second valve mouth on the valve casing, the one end intercommunication second valve pocket of first valve mouth, the first valve pocket of other end intercommunication, the one end intercommunication second valve pocket of second valve mouth, the first valve pocket of other end intercommunication, be equipped with first pressure valve on the first valve mouth, be equipped with the second pressure valve on the second valve mouth, the circulation opposite direction of first valve mouth and second valve mouth. The valve is provided with a first pressure valve on the first valve nozzle, a second pressure valve on the second valve nozzle, and the first pressure valve and the second pressure valve enable the first valve nozzle and the second valve nozzle to be opened only on the premise of reaching certain pressure, and the circulation directions are opposite, so that the breathing function of remaining pressure is realized.

Description

Residual pressure breather valve

Technical Field

The utility model belongs to the technical field of vehicle accessories, and particularly relates to a residual pressure breather valve.

Background

With the development of society, the environmental awareness of various industries is gradually strengthened, and automobiles are no exception. In order to prevent fuel vapor in an automobile fuel tank from directly discharging to the atmosphere, a carbon canister is usually connected to a top outlet of the fuel tank, so that the fuel vapor in the fuel tank enters the carbon canister and is adsorbed by activated carbon. When the rotating speed of the engine rises, the adsorbed fuel steam is desorbed and enters the engine to be combusted, so that the recovery of the fuel steam is realized, and the aims of energy conservation and emission reduction are fulfilled.

However, in the above process, the oil tank is required to contain oil and smoothly supply oil, that is, a certain pressure is required to be maintained, and the oil vapor is discharged to the carbon canister after reaching a certain pressure.

Therefore, it is necessary to develop a breather valve with residual pressure function.

Disclosure of Invention

The utility model aims to provide an excess pressure breather valve, which realizes the breathing function of keeping the excess pressure through a first pressure valve and a second pressure valve.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the design is a residual pressure breather valve, including the valve casing, its characterized in that: first valve pocket and second valve pocket have been seted up in the valve casing, be equipped with first air cock and second air cock on the valve casing, first air cock is linked together with first valve pocket, the second air cock is linked together with the second valve pocket, be equipped with first valve mouth and second valve mouth on the valve casing, the one end intercommunication second valve pocket of first valve mouth, the first valve pocket of other end intercommunication, the one end intercommunication second valve pocket of second valve mouth, the first valve pocket of other end intercommunication, be equipped with first pressure valve on the first valve mouth, be equipped with the second pressure valve on the second valve mouth, the circulation opposite direction of first valve mouth and second valve mouth.

Preferably, the first pressure valve comprises a membrane connected to the valve casing, the membrane divides the first valve cavity into an air cavity and a balance cavity, the first air tap, the first valve nozzle and the second valve nozzle are all communicated with the air cavity, the membrane can be blocked on the first valve nozzle, a first elastic body is arranged in the balance cavity, one end of the first elastic body is connected with the membrane, and the other end of the first elastic body is connected with the valve casing; the valve casing still is equipped with the third air cock, and the third air cock is linked together with balanced chamber.

Preferably, a supporting seat is fixed on the membrane, and the first elastic connection is arranged on the supporting seat.

Preferably, a fixing seat is arranged on the valve casing, and the first elastic body is connected with the fixing seat.

Preferably, a fourth air nozzle is further arranged on the valve shell and communicated with the air cavity.

Preferably, the second pressure valve includes the valve ball, inlays the dress bushing pipe in the second valve mouth, and the one end intercommunication second valve chamber of bushing pipe, the inner chamber of the other end intercommunication second valve mouth, and the bushing pipe can be blocked to the valve ball, and the second elastomer is connected to the valve ball, and the other end connecting support of second elastomer, support and valve casing relatively fixed.

Preferably, the liner is a metal tube.

Preferably, the support is fixed on the second valve nozzle, a hollow hole is formed in the support, one end of the hollow hole is communicated with the air cavity, and the other end of the hollow hole is communicated with the inner cavity of the second valve nozzle.

Preferably, the first elastic body is a first spring, and the second elastic body is a second spring.

Preferably, the valve housing includes a valve seat and a valve cover covering the valve seat, and the periphery of the coating is pressed between the valve seat and the valve cover.

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

1. because first valve pocket and second valve pocket have been seted up in the valve casing, be equipped with first valve mouth and second valve mouth on the valve casing, the equal one end intercommunication second valve pocket of first valve mouth and second valve mouth, the first valve pocket of other end intercommunication, be equipped with first pressure valve on the first valve mouth, be equipped with the second pressure valve on the second valve mouth, first pressure valve and second pressure valve make first valve mouth and second valve mouth can only open under reaching certain pressure prerequisite to circulation opposite direction realizes the respiratory function who has the excess pressure.

2. The first pressure valve adopts a first elastic body auxiliary leather membrane form, so that the realization is convenient and the performance is stable; and the third air cock that sets up on the valve casing is linked together with balanced chamber for balanced chamber can be the same with external world, makes the pressure in the balanced chamber maintain atmospheric pressure all the time, does not change because of the volume change in balanced chamber.

3. Because fixed supporting seat on the involucra, first elastic connection is on the supporting seat, can evenly transmit the holding power of first elastomer for the involucra through the supporting seat, avoids the involucra to damage because of stress concentration, does benefit to extension its life.

4. Because be equipped with the fixing base on the valve casing, first elastomer is connected with the fixing base, is convenient for fix the mounted position of first elastomer, stabilizes its impetus on the involucra, plays extension involucra life's effect equally.

5. Because still set up the fourth air cock on the valve casing, the fourth air cock is linked together with the air cavity, can gather the gas appearance in the air cavity through the fourth air cock, detects its atmospheric pressure, the reasonable unified control of the vehicle of being convenient for.

6. Because the second pressure valve selects the form of valve ball and second elastomer cooperation bushing pipe for use, be convenient for realize and the stable performance.

7. Because the liner tube chooses the metal pipe for use, strengthened the intensity of liner tube, avoided warping because of external force such as assembly, do benefit to the leakproofness of reinforcing valve ball shutoff.

8. Because the valve casing adopts the structure of disk seat and the equipment valve gap on the disk seat, the installation of the valve inner part of being convenient for to and the peripheral fixed of involucra.

9. The utility model has simple structure, realizes the breathing function of keeping the residual pressure, can avoid the overpressure of fuel vapor in the fuel tank, can ensure that the fuel tank maintains certain pressure to smoothly supply fuel, and is convenient for popularization and application in the industry.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is an enlarged sectional view B-B of FIG. 2;

fig. 4 is an enlarged sectional view of C-C in fig. 2.

The labels in the figure are: 1. a valve cover; 2. a valve seat; 3. a first air tap; 4. a second air tap; 5. a third air tap; 6. a fourth air tap; 7. an air cavity; 8. a second valve cavity; 9. a balancing chamber; 10. a first spring; 11. a fixed seat; 12. a supporting seat; 13. a skin membrane; 14. a second valve nozzle; 15. a support; 16. a second spring; 17. a valve ball; 18. a metal tube; 19. a first valve mouth.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 3, the valve housing of the present invention is composed of a valve seat 2 and a valve cover 1 covering the valve seat 2, a first valve chamber and a second valve chamber 8 are enclosed between the valve seat 2 and the valve cover 1, a coating film 13 is provided in the first valve chamber, the periphery of the coating film 13 is pressed between the valve seat 2 and the valve cover 1, and the coating film 13 partitions the first valve chamber into an air chamber 7 and a balance chamber 9. A supporting seat 12 is fixed on the membrane 13, a fixed seat 11 is arranged on the valve cover 1, a first spring 10 is connected on the supporting seat 12, and the other end of the first spring 10 is connected with the fixed seat 11, so that the first spring 10 is positioned in the balance cavity 9. The valve seat 2 is provided with a first air nozzle 3 and a second air nozzle 4, the first air nozzle 3 is communicated with the air cavity 7, and the second air nozzle 4 is communicated with the second valve cavity 8. As shown in fig. 4, the valve seat 2 is provided with a first valve nozzle 19 and a second valve nozzle 14, and the second valve nozzle 14 is arranged lower than the first valve nozzle 19. One end of the first valve nozzle 19 communicates with the second valve chamber 8, the other end communicates with the first valve chamber, and the coating 13 can be sealed on the first valve nozzle 19. The second valve mouth 14 is the same as the first valve mouth 19, one end of the second valve mouth is communicated with the second valve cavity 8, the other end of the second valve mouth is communicated with the first valve cavity, a metal pipe 18 is embedded in the second valve mouth 14, one end of the metal pipe 18 is communicated with the second valve cavity 8, the other end of the metal pipe is communicated with an inner cavity of the second valve mouth 14, a support 15 with a hollow hole is further fixed on the second valve mouth 14, and therefore the support 15 and the valve shell are relatively fixed. One end of the hollow hole is communicated with the air cavity 7, the other end of the hollow hole is communicated with an inner cavity of the second valve nozzle 14, a valve ball 17 is arranged in the second valve nozzle 14 between the support 15 and the metal pipe 18, the metal pipe 18 can be blocked by the valve ball 17, the valve ball 17 is connected with a second spring 16, and the other end of the second spring 16 is connected to the support 15.

In order to maintain the pressure in the balance chamber 9 at atmospheric pressure all the time without changing due to the volume change of the balance chamber 9, as shown in fig. 2, a third air nozzle 5 is provided on the valve cover 1, and the third air nozzle 5 is communicated with the balance chamber 9, i.e., the balance chamber 9 is communicated with the outside. Still set up fourth air cock 6 on disk seat 2, fourth air cock 6 is linked together with air cavity 7, can gather the gas appearance in air cavity 7 through fourth air cock 6, detects its atmospheric pressure, the reasonable unified control of the vehicle of being convenient for.

The working process of the utility model is as follows:

during the use, connect oil tank top with first air cock 3, second air cock 4 connects the carbon tank. Fuel steam in the oil tank enters the air cavity 7 through the first air nozzle 3, when the pressure of the fuel steam reaches a certain value, the elastic force of the leather diaphragm 13 overcoming the first spring 10 is pushed to move towards the side of the balance cavity 9, so that the leather diaphragm 13 loses the plugging effect on the first valve nozzle 19, and the fuel steam can enter the second valve cavity 8 through the first valve nozzle 19 and then enters the carbon tank through the second air nozzle 4. When the pressure of the fuel vapor is reduced to a level insufficient to overcome the elastic force of the first spring 10 as the fuel vapor is discharged, the first spring 10 is reset, so that the diaphragm 13 is restored to close the first valve nozzle 19. That is, the fuel vapor is discharged from the air chamber 7 to the second valve chamber 8 only when the fuel vapor is large enough to overcome the elastic force of the first spring 10, thereby maintaining the pressure in the fuel tank. When the generation amount of fuel steam is small and the oil in the oil tank is consumed fast, the fuel steam space on the upper part of the oil tank is increased due to the reduction of the amount of the oil, the air pressure in the oil tank is reduced, when the air pressure is reduced to a certain degree, the air in the second valve cavity 8 overcomes the elasticity of the second spring 16 to push the valve ball 17, so that the valve ball 17 is separated from the sealing effect on the metal pipe 18, the air in the second valve cavity 8 enters the air cavity 7 and is then supplemented into the oil tank through the first air nozzle 3, and a certain air pressure is still maintained in the oil tank, so that the oil can be smoothly supplied.

In the above process, the first valve nozzle 19 allows fuel vapor to enter the second valve chamber 8 from the gas chamber 7, and the second valve nozzle 14 allows gas to enter the gas chamber 7 from the second valve chamber 8, with the flow directions of the two being opposite.

Except that the first spring 10 is used as the first elastic body and the second spring 16 is used as the second elastic body, a rubber body and the like can be selected, so long as the rubber body can be elastically deformed under the action of external force and automatically return under the action of self elasticity when the external force constraint is lost, and no specific requirements are made on the structure of the rubber body. Similarly, the first pressure valve and the second pressure valve are not limited to the above-described specific structure, and may be opened when a certain pressure is reached, or may be closed otherwise.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a residual pressure breather valve, includes the valve casing, its characterized in that: first valve pocket and second valve pocket have been seted up in the valve casing, be equipped with first air cock and second air cock on the valve casing, first air cock is linked together with first valve pocket, the second air cock is linked together with the second valve pocket, be equipped with first valve mouth and second valve mouth on the valve casing, the one end intercommunication second valve pocket of first valve mouth, the first valve pocket of other end intercommunication, the one end intercommunication second valve pocket of second valve mouth, the first valve pocket of other end intercommunication, be equipped with first pressure valve on the first valve mouth, be equipped with the second pressure valve on the second valve mouth, the circulation opposite direction of first valve mouth and second valve mouth.

2. The residual pressure breather valve according to claim 1, wherein: the first pressure valve comprises a membrane connected to a valve casing, the membrane divides the first valve cavity into an air cavity and a balance cavity, the first air nozzle, the first valve nozzle and the second valve nozzle are all communicated with the air cavity, the membrane can be blocked on the first valve nozzle, a first elastic body is arranged in the balance cavity, one end of the first elastic body is connected with the membrane, and the other end of the first elastic body is connected with the valve casing; the valve casing still is equipped with the third air cock, and the third air cock is linked together with balanced chamber.

3. The residual pressure breather valve according to claim 2, wherein: the supporting seat is fixed on the leather membrane, and the first elastic connection is arranged on the supporting seat.

4. The residual pressure breather valve according to claim 3, wherein: be equipped with the fixing base on the valve casing, first elastomer is connected with the fixing base.

5. The residual pressure breather valve according to claim 2, wherein: and a fourth air nozzle is also arranged on the valve shell and is communicated with the air cavity.

6. The residual pressure breather valve according to any one of claims 2 to 5, wherein: the second pressure valve comprises a valve ball, a liner tube is embedded in the second valve nozzle, one end of the liner tube is communicated with the second valve cavity, the other end of the liner tube is communicated with an inner cavity of the second valve nozzle, the liner tube can be blocked by the valve ball, the valve ball is connected with a second elastic body, the other end of the second elastic body is connected with a support, and the support and the valve shell are relatively fixed.

7. The residual pressure breather valve according to claim 6, wherein: the liner tube is a metal tube.

8. The residual pressure breather valve according to claim 6, wherein: the support is fixed on the second valve nozzle, a hollow hole is formed in the support, one end of the hollow hole is communicated with the air cavity, and the other end of the hollow hole is communicated with the inner cavity of the second valve nozzle.

9. The residual pressure breather valve according to claim 8, wherein: the first elastic body is a first spring, and the second elastic body is a second spring.

10. The residual pressure breather valve according to any one of claims 2 to 5, wherein: the valve casing includes the valve seat and the valve gap of lid dress on the valve seat, and the periphery crimping of involucra is between valve seat and valve gap.