CN215487718U

CN215487718U - Natural gas cylinder valve flow limiting device for vehicle

Info

Publication number: CN215487718U
Application number: CN202121343741.1U
Authority: CN
Inventors: 马正云; 贡浩伟; 鲁卫国
Original assignee: Danyang Feilun Gas Valve Co ltd
Current assignee: Danyang Feilun Gas Valve Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-01-11
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a flow limiting device for a natural gas cylinder valve for a vehicle, and mainly relates to the field of natural gas cylinder valves for vehicles. The valve comprises a valve body, be equipped with a plurality of inlet ports that run through the valve body and communicate with the passageway of ventilating in the valve body circumference, it is equipped with the bulb pole to remove the intracavity slip, the bulb of bulb pole is located the passageway of ventilating and the bulb bottom surface can with the tip butt in removal chamber, the bulb terminal surface of bulb pole can give vent to anger the end with the tip butt and the shutoff of passageway of ventilating, bulb pole overcoat has the spring, spring one end is close to the one end butt of the passageway of ventilating with the removal chamber, the spring other end keeps away from the one end linkage of bulb with the bulb pole, the one end that the end of giving vent to anger was kept away from to the valve body is connected with presses the cap, it has a plurality ofly and removes the second balancing hole that the chamber communicates to press to open on the cap. The utility model has the beneficial effects that: the gas-filled cylinder valve has the advantages of firm structure, capability of effectively avoiding the resonance of the spring caused by high flow rate gas when being inflated, long service life of the spring and capability of ensuring the normal use of the cylinder valve.

Description

Natural gas cylinder valve flow limiting device for vehicle

Technical Field

The utility model relates to the field of natural gas cylinder valves for vehicles, in particular to a flow limiting device of a natural gas cylinder valve for a vehicle.

Background

Current automobile-used natural gas cylinder valve generally all installs current limiting device, and current limiting device acts on: the gas flow limiting device can automatically close the gas using channel when the gas flow exceeds a set value due to gas leakage caused by breakage of a gas supply high-pressure pipeline or loosening of a joint, so that the flow limiting effect is achieved, the purposes of avoiding high-pressure leakage and greatly improving the use safety are achieved, and the possibility of occurrence of serious accidents is effectively reduced.

The patent number is 201120068670.9, the name is automobile-used natural gas cylinder valve current limiting device's patent, discloses a current limiting device that can play the current-limiting protection effect, in this structure, because the spring setting is close to one side of export at the current-limiting ball, and the cylinder valve is when aerifing, and high velocity of flow gas flows through the spring, has great impact force to the spring, can arouse the resonance of spring, leads to spring life to shorten, and then influences the use of device.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a natural gas cylinder valve flow limiting device for a vehicle, which has a firm structure, can effectively avoid spring resonance caused by high-flow-rate gas during inflation, has long service life and ensures normal use of the device.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a natural gas cylinder valve flow-limiting device for a vehicle comprises a valve body, wherein a ventilation channel is arranged in the valve body, one end of the ventilation channel is communicated with an air outlet end, the other end of the ventilation channel is communicated with a moving cavity, a plurality of air inlets which penetrate through the valve body and are communicated with the ventilation channel are arranged on the valve body in the circumferential direction, a ball head rod is arranged in the moving cavity in a sliding manner, the ball head of the ball head rod is positioned in the ventilation channel, the bottom surface of the ball head can be abutted against the end part of the moving cavity, the ball head end surface of the ball head rod can be abutted against the end part of the ventilation channel and blocks the air outlet end, the ball head rod is sleeved with a spring, one end of the spring is abutted against one end of the moving cavity close to the ventilation channel, the other end of the spring is linked with one end of the ball head rod far away from the ball head, one end of the valve body, which is far away from the air outlet end, is connected with a pressing cap, and a plurality of second balance holes communicated with the movable cavity are formed in the pressing cap.

Furthermore, a valve seat is arranged on the inner wall of the end, close to the air outlet end, of the ventilation channel, and the ball head rod can be abutted against the valve seat.

Furthermore, a supporting seat is arranged on the inner wall of the moving cavity close to one end of the ventilation channel, an upper liner abutted to the supporting seat is arranged in the moving cavity, a lower liner is arranged in the moving cavity in a sliding mode, the ball head rod penetrates through the upper liner and the lower liner, the spring is located between the upper liner and the lower liner, the bottom surface of the ball head rod is in contact with the outer end face of the upper liner, one end, far away from the ball head, of the ball head rod is linked with the lower liner, and the lower liner is abutted to one end, located in the moving cavity, of the pressing cap.

Furthermore, a clamping groove is formed in the outer side of one end, far away from the ball head, of the ball head rod, and a clamping spring clamped with the clamping groove is arranged on the lower liner.

Furthermore, a first balance hole which penetrates through the valve body and is communicated with the air outlet end is formed in the valve body.

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

when the cylinder valve is inflated, high pressure, high flow rate gas is through the end of giving vent to anger, the air passage, the inlet port gets into the gas cylinder, gaseous entering gas cylinder in-process, owing to set up a plurality of first balance holes that communicate with removal chamber on the pressure cap, outside gas can get into through first balance hole and remove the intracavity, prevent to remove the atmospheric pressure of intracavity and the atmospheric pressure of air passage department different, make the head and the tail gas pressure of bulb pole unanimous, gaseous upwards siphon to bulb pole bulb end has been eliminated when aerifing, avoided the bulb pole to pull each other by the pretightning force of gaseous siphon suction and spring and produce resonance in removing the intracavity, prevent the spring damage, the life of extension spring, guarantee the normal use of device.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the operation state structure of the present invention.

Reference numerals shown in the drawings:

1. a valve body; 2. a vent passage; 3. an air outlet end; 4. a moving chamber; 5. an air inlet; 6. a ball-head rod; 7. a spring; 8. pressing the cap; 9. a first balance hole; 10. a valve seat; 11. a supporting seat; 12. an upper liner; 13. a lower liner; 14. a clamp spring; 15. a second balance hole.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

The utility model relates to a flow limiting device for a natural gas cylinder valve for a vehicle, which comprises a valve body 1, wherein a vent channel 2 is arranged in the valve body 1, one end of the vent channel 2 is communicated with an air outlet end 3, the valve body 1 is connected with an air inlet of the natural gas cylinder valve through the air outlet end 3, the other end of the vent channel 2 is communicated with a moving cavity 4, a plurality of air inlet holes 5 which penetrate through the valve body 1 and are communicated with the vent channel 2 are arranged on the valve body 1 in the circumferential direction, a ball head rod 6 is arranged in the moving cavity 4 in a sliding manner, the ball head rod 6 consists of a ball head-shaped head part and a rod part, the ball head of the ball head rod 6 is positioned in the vent channel 2, the bottom surface of the ball head can be abutted against the end part of the moving cavity 4 so as to block the moving cavity 4, the ball head end surface of the ball head rod 6 can be abutted against the end part of the vent channel 2 and block the air outlet end 3, a spring 7 is sleeved outside the ball head rod 6, one end of the spring 7 is abutted against one end of the moving cavity 4 close to the vent channel 2, the other end of the spring 7 is linked with one end of the ball rod 6 far away from the ball head, so that when the ball rod 6 slides in the moving cavity 4, the end part of the spring 7 moves together with the tail end of the ball rod 6, one end of the valve body 1 far away from the air outlet end 3 is in threaded connection with a pressing cap 8, the pressing cap 8 is in threaded connection with the inner wall of the valve body 1, a plurality of first balance holes 9 communicated with the moving cavity 4 are formed in the pressing cap 8,

when the natural gas bottle valve is used for gas supply, the gas outlet end 3 of the flow limiting device is connected with a gas inlet interface of the natural gas bottle valve, under the normal gas supply flow, the upward siphoning suction force generated by gas on the ball head rod 6 is smaller than the pre-tightening force of the spring 7, the bottom surface of the ball head rod 6 is abutted against the end part of the movable cavity 4 and seals the movable cavity 4, the natural gas is prevented from leaking through the movable cavity 4, and the natural gas enters the bottle valve through the gas inlet hole 5, the ventilation channel 2 and the gas outlet end 3 and is discharged for use through the bottle valve; when a high-pressure pipeline of a natural gas supply pipeline is broken or a joint looses to cause gas leakage, so that the gas flow exceeds a set value, the upward siphoning force generated by the gas on the ball head rod 6 is greater than the pre-tightening force of the spring 7, the ball head rod 6 is driven by the suction force to move upwards until the end face of the ball head is abutted against the end part of the ventilation channel 2 and the gas outlet end 3 is blocked, so that the ventilation channel is blocked, the flow-limiting protection effect is achieved, the fault repair can be carried out when the natural gas cylinder valve is closed, the ball head rod 6 moves downwards to be separated from the valve seat 10 under the action of the elastic force of the spring 7 when the cylinder valve is closed, and the gas circuit is opened and recovered to the initial state;

when the cylinder valve is inflated, high pressure and high flow rate gas enter the gas cylinder through the gas outlet end 3, the vent channel 2 and the gas inlet hole 5, and gas enters the gas cylinder, and the gas enters the gas cylinder in the process, because the pressure cap 8 is provided with a plurality of first balance holes 9 communicated with the movable cavity 4, external gas can enter the movable cavity 4 through the first balance holes 9, so that the gas pressure in the movable cavity 4 is prevented from being different from that of the vent channel 2, the head and tail gas pressure of the ball head rod 6 is consistent, the upward siphon force of the gas on the ball head end of the ball head rod 6 during inflation is counteracted, and the phenomenon that the ball head rod 6 is pulled by the gas siphon force and the pretightening force of the spring 7 in the movable cavity 4 to generate resonance is avoided.

Preferably, be equipped with valve seat 10 on the inner wall that the passageway of ventilating 2 is close to 3 one ends of gas outlet end, bulb pole 6 can be with valve seat 10 butt, and the diameter of valve seat 10 is less than the diameter of bulb, makes things convenient for the butt of bulb pole 6 and valve seat 10 on the one hand, and on the other hand can guarantee the leakproofness of bulb pole 6 to 3 shutoff of gas outlet end after bulb pole 6 and valve seat 10 butt, prevents that the gas cylinder from breaking down the back gas leakage.

Preferably, a support 11 is arranged on the inner wall of the moving cavity 4 close to one end of the vent channel 2, the inner diameter of the vent channel 2 is smaller than the inner diameter of the moving cavity 4, so that the end of the moving cavity 4 forms the support 11, an upper gasket 12 abutting against the support 11 is arranged in the moving cavity 4, the upper gasket 12 is fixed through the support 11, a lower gasket 13 is arranged in the moving cavity 4 in a sliding manner, the ball rod 6 penetrates through the upper gasket 12 and the lower gasket 13, the ball rod 6 is connected with the upper gasket 12 in a sliding manner, the spring 7 is arranged between the upper gasket 12 and the lower gasket 13, the bottom surface of the ball head of the ball rod 6 is in contact with the outer end surface of the upper gasket 12, one end of the ball rod 6 far away from the ball head is linked with the lower gasket 13, the lower gasket 13 abuts against one end of the press cap 8 in the moving cavity 4, so that the spring 7 can spring the upper gasket 12 and the lower gasket 13 are flicked to the two ends to ensure that the ball rod 6 is in contact with the end surface of the upper gasket 12, the ventilating channel is opened, when a high-pressure pipeline of a natural gas supply pipeline is broken or a joint is loosened to cause gas leakage, and the gas flow exceeds a set value, the upward siphoning suction force generated by the gas on the ball head rod 6 is greater than the pre-tightening force of the spring 7, the ball head rod 6 moves upwards until being abutted and attached to the valve seat 10, the ventilating channel is blocked, the lower gasket 13 is driven to move upwards to extrude the spring 7, and the current-limiting protection effect is achieved.

Preferably, a clamping groove is formed in the outer side of one end, far away from the ball head, of the ball head rod 6, a clamping spring 14 clamped with the clamping groove is arranged on the lower liner 13, the lower liner 13 and the ball head rod 6 are connected in an installing mode through the clamping of the clamping spring 14 and the clamping groove, and linkage of the ball head rod 6 and the lower liner 13 is achieved.

Preferably, the valve body 1 is provided with a second balance hole 15 penetrating through the valve body 1 and communicated with the gas outlet end 3, when a high-pressure pipeline of a natural gas supply pipeline is broken or a joint is loosened to cause gas leakage, so that the gas flow exceeds a set value, the ball head rod 6 seals the vent channel 2 at the moment, the gas can only slightly leak through the second balance hole 15, the natural gas cylinder valve is closed to repair the fault, and when the cylinder valve is closed, the gas enters the gas outlet end 3 through the second balance hole 15, so that the pressure at the gas outlet end 3 is consistent with the pressure in the gas cylinder.

This product makes bulb pole 6's head and tail gas pressure unanimous, and gas is to the ascending siphon suction of bulb end of bulb pole 6 when having eliminated and aerifing, has avoided bulb pole 6 to pull each other and produce resonance by the pretightning force of gas siphon suction and spring 7 in removing chamber 4, prevents that spring 7 from damaging, prolongs spring 7's life, guarantees the normal use of device.

Claims

1. The utility model provides an automobile-used natural gas cylinder valve current limiting device, includes valve body (1), be equipped with ventilation channel (2) in valve body (1), ventilation channel (2) one end intercommunication has the end of giving vent to anger (3), ventilation channel (2) other end intercommunication has removal chamber (4), its characterized in that: a plurality of air inlets (5) which penetrate through the valve body (1) and are communicated with the ventilation channel (2) are arranged on the valve body (1) in the circumferential direction, a ball head rod (6) is arranged in the moving cavity (4) in a sliding way, the ball head of the ball head rod (6) is positioned in the ventilation channel (2), the bottom surface of the ball head can be abutted against the end part of the moving cavity (4), the ball head end surface of the ball head rod (6) can be abutted against the end part of the ventilation channel (2) and blocks the air outlet end (3), a spring (7) is sleeved outside the ball head rod (6), one end of the spring (7) is abutted against one end of the moving cavity (4) close to the ventilation channel (2), the other end of the spring (7) is linked with one end of the ball head rod (6) far away from the ball head, one end of the valve body (1) far away from the air outlet end (3) is connected with a pressure cap (8), the pressure cap (8) is provided with a plurality of first balance holes (9) communicated with the movable cavity (4).

2. The natural gas cylinder valve flow-limiting device for vehicles according to claim 1, wherein: and a valve seat (10) is arranged on the inner wall of the ventilation channel (2) close to one end of the air outlet end (3), and the ball head rod (6) can be abutted against the valve seat (10).

3. The natural gas cylinder valve flow-limiting device for vehicles according to claim 1, wherein: the inner wall of one end, close to the ventilation channel (2), of the moving cavity (4) is provided with a supporting seat (11), an upper liner (12) abutted to the supporting seat (11) is arranged in the moving cavity (4), a lower liner (13) is arranged in the moving cavity (4) in a sliding mode, the ball head rod (6) penetrates through the upper liner (12) and the lower liner (13), the spring (7) is located between the upper liner (12) and the lower liner (13), the ball head bottom surface of the ball head rod (6) is in contact with the outer end face of the upper liner (12), one end, far away from the ball head, of the ball head rod (6) is linked with the lower liner (13), and the lower liner (13) is abutted to one end, located in the moving cavity (4), of the pressing cap (8).

4. The natural gas cylinder valve flow-limiting device for vehicles according to claim 3, wherein: the ball head is characterized in that a clamping groove is formed in the outer side of one end, far away from the ball head, of the ball head rod (6), and a clamping spring (14) clamped with the clamping groove is arranged on the lower liner (13).

5. The natural gas cylinder valve flow-limiting device for vehicles according to claim 1, wherein: and a second balance hole (15) which penetrates through the valve body (1) and is communicated with the air outlet end (3) is formed in the valve body (1).