CN216555543U - Safety valve of vehicle-mounted gas cylinder - Google Patents

Abstract

The utility model relates to the field of valves, in particular to a safety valve of a vehicle-mounted gas cylinder, which comprises a valve body, wherein a valve cavity is arranged in the valve body, a gas inlet end and a gas outlet end are arranged at two ends of the valve cavity, the valve cavity is connected with the gas cylinder, internal threads are arranged on the inner wall of the gas outlet end, an internal nut is spirally arranged at the gas outlet end of the valve body, a gas outlet nozzle which penetrates through the gas outlet end and extends to the outside of the valve body is arranged at the top of the internal nut, a plurality of first gas outlet holes are formed in the radial direction of the gas outlet nozzle, a top cap is coaxially arranged on the gas outlet nozzle and can slide up and down in the axial direction of the gas outlet nozzle, and a second gas outlet hole corresponding to the first gas outlet holes is formed in the radial direction of the top cap.

Description

Safety valve of vehicle-mounted gas cylinder

Technical Field

The utility model relates to the field of valves, in particular to a safety valve of a vehicle-mounted gas cylinder.

Background

The safety valve is a starting and closing part, is arranged on the equipment or the pipeline and is in a normally closed state under the action of external force, when the pressure of the medium in the equipment or the pipeline rises to exceed a specified value, the safety valve is opened, and the medium is discharged out of the system through an air outlet of the safety valve to prevent the pressure of the medium in the pipeline or the equipment from exceeding a specified value. The safety valve is mainly used for boiler, pressure container and pipeline, and its control pressure is not greater than specified value, so that it can play important role in protecting personal safety and equipment operation.

The safety valves are installed on the gas cylinders installed on the vehicle body, the required vehicle body part is supplied with gas through the gas cylinders, and the safety use of the gas cylinders is guaranteed through the safety valves. However, in the prior art, the air outlet of the safety valve on the vehicle body is exposed in the air environment, impurities in the air, such as dust, water vapor and the like, easily enter the air outlet of the valve body, and along with the continuous accumulation of the impurities and the bumping of the vehicle body, the impurities can enter the sealing surface of the valve body, so that the problems of leakage, non-return seat and the like of the safety valve occur, and the service life of the safety valve is influenced.

Chinese patent application No. CN202022619894.6 discloses a safety valve for a vehicle-mounted gas cylinder. This relief valve for on-vehicle gas cylinder includes: valve body, adjusting nut, piston, spring, sealed pad and duckbilled valve, adjusting nut mesh end of giving vent to anger at the valve body, and the piston setting is at the valve intracavity of valve body, and sealed the setting is at the tip of piston, and the spring setting is at the valve intracavity, and the duckbilled valve is made by elastic material, sets up in adjusting nut's through-hole.

But duckbill valve is rubber material usually, and easy breakage leads to the not good protective effect to the dust in daily use, and long-time placing easily leads to rubber material's duckbill valve nature to appear changing.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a relief valve of on-vehicle gas cylinder to prior art problem, and this technical scheme has solved how to prevent that impurity such as dust, dust and vapor from getting into the inside technical problem of relief valve through the relief valve gas outlet of on-vehicle gas cylinder.

In order to solve the problems of the prior art, the utility model adopts the technical scheme that:

the safety valve comprises a valve body, wherein a valve cavity is arranged in the valve body, an air inlet end and an air outlet end are arranged at two ends of the valve cavity, the valve cavity is connected with an air bottle, an inner thread is arranged on the inner wall of the air outlet end, an inner nut is spirally mounted at the air outlet end of the valve body, a piston head is arranged in the valve body, the valve cavity of the valve body is plugged by the piston head, an elastic connection spring is arranged between the inner nut and the piston head, the top of the inner nut is provided with an air outlet nozzle which penetrates through the air outlet end and extends to the outside of the valve body, a plurality of first air outlet holes are formed in the radial direction of the air outlet nozzle, a top cap is coaxially arranged on the air outlet nozzle and can slide up and down in the axis direction of the air outlet nozzle, and a second air outlet hole corresponding to the first air outlet holes is formed in the radial direction of the top cap.

Preferably, the week side of air outlet nozzle is provided with the spacing recess of a plurality of vertical extensions, and spacing recess is around the axis evenly distributed of air outlet nozzle, and the inner wall of hood is provided with a plurality of stoppers identical with spacing recess width, and the stopper slides the cartridge in spacing recess, and when the top of stopper and the top contact of spacing recess, the axis position of first venthole and second venthole is the same.

Preferably, the valve body give vent to anger and hold the outside and be provided with the adsorption strip, the adsorption strip setting is provided with a plurality of magnets in hood and valve body contact position, the bottom of hood.

Preferably, the upper part of the piston head comprises a plugging end, the diameter of the section of the plugging end is matched with that of the section of the valve cavity, the diameter of the section of the piston head is matched with that of the section of the air inlet end, and a plurality of air inlets are formed in the piston head in the radial direction.

Preferably, an annular sealing ring is mounted on the periphery of the plugging end, and the sealing ring is attached to the inner wall of the valve cavity.

Preferably, the lower end of the inner nut is provided with a first concave mounting cavity, the upper part of the plugging end of the piston head is provided with a second concave mounting cavity, and two ends of the spring are respectively inserted into the first mounting cavity and the second mounting cavity in a limiting manner.

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

1. according to the utility model, the top cap made of a light-weight rigid material is sleeved outside the air outlet nozzle, and the axial positions of the second air outlet hole arranged in the radial direction of the top cap and the first air outlet hole on the air outlet nozzle are changed, so that external impurities can be isolated by the top cap and cannot enter the air outlet nozzle, the top cap is conveniently jacked up by gas in the valve body for exhausting, and the condition that the air outlet effect of the air outlet nozzle is influenced or the dustproof effect of the top cap is invalid due to the fact that the top cap is not deteriorated after the top cap is placed for a long time is avoided.

2. The air outlet nozzle is limited and arranged in the limiting groove through the limiting block, so that the air outlet nozzle is guaranteed to move stably in the axis direction, and the limiting groove has a certain limiting effect on the limiting block, so that the top cap is prevented from falling off from the air outlet nozzle.

3. According to the utility model, the adsorption strip is arranged at the position where the top side of the air outlet end is contacted with the bottom of the top cap, and is matched with the magnet at the bottom of the top cap, so that when the air outlet nozzle is sealed by the top cap, the sealing state of the air outlet nozzle by the top cap is automatically maintained through magnetic force, and the air outlet nozzle is automatically opened during air exhaust.

Drawings

FIG. 1 is a perspective view of an embodiment;

FIG. 2 is a front view of the embodiment;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a partial enlarged view of FIG. 3 at B;

FIG. 5 is an exploded perspective view of the embodiment;

FIG. 6 is a perspective view of the overcap of the embodiment;

the reference numbers in the figures are:

1-a valve body; 1 a-a valve cavity; 1 b-the gas inlet end; 1 c-an air outlet end; 1c 1-absorbent strip;

2-an internal nut; 2 a-an air outlet nozzle; 2a 1-first outlet; 2a 2-limit groove; 2 b-a first mounting cavity;

3-a piston head; 3 a-plugging the end; 3a 1-o-ring; 3a 2-second mounting cavity; 3 b-an air intake;

4-a spring;

5-top cap; 5 a-a second air outlet; 5 b-a limiting block; 5 c-magnet.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 6, the present application provides:

a safety valve of a vehicle-mounted gas cylinder comprises a valve body 1, a valve cavity 1a is arranged in the valve body 1, a gas inlet end 1b and a gas outlet end 1c are arranged at two ends of the valve cavity 1a, the valve cavity 1a is connected with the gas cylinder, an inner wall of the gas outlet end 1c is provided with an internal thread, an inner nut 2 is spirally arranged at the gas outlet end 1c of the valve body 1, a piston head 3 is arranged in the valve body 1, the piston head 3 seals the valve cavity 1a of the valve body 1, a spring 4 is elastically connected between the inner nut 2 and the piston head 3, the top of the inner nut 2 is provided with a gas outlet nozzle 2a penetrating through a gas outlet end 1c and extending to the outside of the valve body 1, a plurality of first gas outlet holes 2a1 are formed in the radial direction of the gas outlet nozzle 2a, a top cap 5 is coaxially arranged on the gas outlet nozzle 2a, the top cap 5 can slide up and down in the axis direction of the gas outlet nozzle 2a, and a second gas outlet hole 5a corresponding to the first gas outlet hole 2a1 is formed in the radial direction of the top cap 5.

Based on the above-mentioned embodiment, the technical problem that this application wants to solve is how to prevent impurity such as dust, dust and vapor from getting into the relief valve inside through the relief valve gas outlet of on-vehicle gas cylinder. Therefore, the safety valve is formed by the valve body 1, the inner nut 2, the piston head 3 and the spring 4, the inner wall of the air outlet end 1c of the valve cavity 1a is provided with internal threads, the inner nut 2 can be spirally installed in the valve cavity 1a to ensure stable installation, the air outlet nozzle 2a of the inner nut 2 penetrates through the air outlet end 1c to extend out of the valve body 1, the air inlet end 1b of the valve body 1 is connected with an air bottle, when the air pressure in the air bottle is too high and needs to exhaust, the piston head 3 is ejected out from the air inlet end 1b by stronger air pressure, the air enters the valve cavity 1a and moves to the air outlet end 1c and is exhausted from the air outlet nozzle 2a, in order to prevent external dust impurities from entering the valve cavity 1a from the air outlet nozzle 2a, the outer part of the air outlet nozzle 2a is sleeved with the top cap 5, when the valve body 1 is in a non-working state, the top cap 5 is sleeved on the air outlet nozzle 2a to seal the inner nut 2a, the air outlet nozzle 2a and the top cap 5 are provided with a first air outlet hole 1 and a second air outlet hole 895 in the radial direction, when the top cap 5 seals the air outlet nozzle 2a, the axis position of first venthole 2a1 and second venthole 5a is not on same straight line, outside impurity is isolated by top cap 5, can't get into among the air outlet nozzle 2a, when valve body 1 needs to exhaust, atmospheric pressure will jack-up 5, along the upward movement of air outlet nozzle 2a axis, first venthole 2a1 and second venthole 5a axis position are in same straight line, realize gaseous discharge, top cap 5 adopts the light rigid material of quality to make, can be plastics also can be the metal material, make things convenient for the interior gas of valve body 1 to exhaust 5 jack-up of top cap, and the condition that the rotten condition can not appear influencing valve body 1 and give vent to anger and the condition that dustproof effect became invalid after long-time placing.

Further, as shown in fig. 4, 5 and 6:

the periphery of the air outlet nozzle 2a is provided with a plurality of vertically extending limiting grooves 2a2, the limiting grooves 2a2 are uniformly distributed around the axis of the air outlet nozzle 2a, the inner wall of the top cap 5 is provided with a plurality of limiting blocks 5b with the same width as the limiting grooves 2a2, the limiting blocks 5b are inserted into the limiting grooves 2a2 in a sliding mode, the top of the limiting blocks 5b is in contact with the top of the limiting grooves 2a2, and the axial positions of the first air outlet holes 2a1 and the second air outlet holes 5a are the same.

Based on the above embodiment, the technical problem that the present application intends to solve is how to realize the movement of the top cap 5 in the axial direction of the air outlet nozzle 2a and ensure that the top cap 5 can realize the plugging and air outlet of the air outlet nozzle 2 a. For this reason, this application is through setting up a plurality of spacing recesses 2a2 in the week side of gas outlet nozzle 2a, top cap 5 is spacing to be installed in spacing recess 2a2 through stopper 5b and is guaranteed that the removal on gas outlet nozzle 2a axis direction is stable, and spacing recess 2a2 has certain limiting displacement to stopper 5b, avoid top cap 5 to drop from gas outlet nozzle 2a, when top cap 5 seals gas outlet nozzle 2a, top cap 5 bottom contact valve body 1's top, second gas outlet hole 5a does not have the overlap position with the axis position of first gas outlet hole 2a1 on same straight line and do not exist, guarantee the complete closure to gas outlet nozzle 2a play, when stopper 5 b's top and spacing recess 2a 2's top contact, first gas outlet hole 2a1 is the same with the axis position of second gas outlet hole 5a, realize smooth and easy exhaust.

Further, as shown in fig. 4, 5 and 6:

an adsorption strip 1c1 is arranged outside the air outlet end 1c of the valve body 1, the adsorption strip 1c1 is arranged at the contact position of the top cap 5 and the valve body 1, and a plurality of magnets 5c are arranged at the bottom of the top cap 5.

Based on the above-described embodiment, the technical problem that the present application intends to solve is how to ensure that the top cap 5 can automatically maintain the closed state to the gas outlet nozzle 2a and automatically open at the time of gas discharge. For this reason, this application sets up the magnet 5c of adsorption strip 1c1 cooperation hood 5 bottom through the position of giving vent to anger the top side of end 1c and hood 5 bottom contact and realizes when hood 5 seals out gas nozzle 2a, through the position of magnetic force maintenance hood 5, adsorption strip 1c1 can be the metal material, if valve body 1 itself for the metal material adsorption strip 1c1 can need not set up, and magnet 5c is far less than the thrust when valve body 1 inside exists high-pressure gas to the absorption dynamics of adsorption strip 1c1, has guaranteed that hood 5 shifts up to continuous the automation of hood 5 when sealing and exhausting of gas nozzle 2a under quiescent condition.

Further, as shown in fig. 3:

the upper part of the piston head 3 comprises a plugging end 3a, the section diameter of the plugging end 3a is matched with that of the valve cavity 1a, the section diameter of the piston head 3 is matched with that of the air inlet end 1b, and a plurality of air inlets 3b are arranged in the radial direction of the piston head 3.

An annular seal ring 3a1 is mounted on the peripheral side of the blocking end 3a, and the seal ring 3a1 is attached to the inner wall of the valve cavity 1 a.

Based on the above-mentioned embodiments, the technical problem that the present application intends to solve is how to realize the blocking and air intake of the piston head 3 at the air intake end 1 b. Therefore, the piston head 3 and the plugging end 3a are respectively limited and inserted in the air inlet end 1b and the valve cavity 1a through different section diameters, the piston head 3 can plug the air inlet end 1b, the plugging end 3a is attached to the inner wall of the valve cavity 1a and matched with the existence of the sealing ring 3a1 to realize sealing between the valve cavity 1a and the air inlet end 1b, when the gas pressure in the gas cylinder is higher, the piston head 3 is ejected out from the air inlet end 1b, and the gas enters the air outlet end 1c through the air inlet hole 3b in the piston head 3 to realize air exhaust.

Further, as shown in fig. 3:

the lower end of the inner nut 2 is provided with a first concave mounting cavity 2b, the upper part of the plugging end 3a of the piston head 3 is provided with a second concave mounting cavity 3a2, and two ends of the spring 4 are respectively limited and inserted in the first mounting cavity 2b and the second mounting cavity 3a 2.

Based on the above embodiments, the technical problem that the present application intends to solve is how to stably connect the inner nut 2 and the piston head 3 by the spring 4. Therefore, the spring 4 is installed in a limiting mode through the first installation cavity 2b and the second installation cavity 3a2 which are arranged on the inner nut 2 and the piston head 3 in a coaxial mode, the stability of the spring 4 in the elastic stretching process is guaranteed, meanwhile, the spring 4 is not attached to the inner wall of the valve cavity 1a, and the gas can be conveniently moved.

The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the utility model. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the utility model, and these changes and modifications are all within the scope of the utility model. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (6)

1. The safety valve of the vehicle-mounted gas cylinder is characterized by comprising a valve body (1), a valve cavity (1a) is arranged in the valve body (1), a gas inlet end (1b) and a gas outlet end (1c) are arranged at two ends of the valve cavity (1a), the valve cavity (1a) is connected with the gas cylinder, internal threads are arranged on the inner wall of the gas outlet end (1c), an inner nut (2) is spirally arranged at the gas outlet end (1c) of the valve body (1), a piston head (3) is arranged in the valve body (1), the piston head (3) plugs the valve cavity (1a) of the valve body (1), an elastic connecting spring (4) is arranged between the inner nut (2) and the piston head (3), a gas outlet nozzle (2a) which penetrates through the gas outlet end (1c) and extends to the outside of the valve body (1) is arranged at the top of the inner nut (2), a plurality of first gas outlet holes (2a1) are arranged in the radial direction of the gas outlet nozzle (2a), and a top cap (5) is coaxially arranged on the gas outlet nozzle (2a), the top cap (5) can slide up and down in the axial direction of the air outlet nozzle (2a), and a second air outlet hole (5a) corresponding to the first air outlet hole (2a1) is arranged in the radial direction of the top cap (5).

2. The safety valve of the vehicle-mounted gas cylinder according to claim 1, characterized in that a plurality of vertically extending limiting grooves (2a2) are arranged on the periphery of the gas outlet nozzle (2a), the limiting grooves (2a2) are uniformly distributed around the axis of the gas outlet nozzle (2a), a plurality of limiting blocks (5b) matched with the limiting grooves (2a2) in width are arranged on the inner wall of the top cap (5), the limiting blocks (5b) are slidably inserted into the limiting grooves (2a2), and when the top of the limiting blocks (5b) is contacted with the top of the limiting grooves (2a2), the axis positions of the first gas outlet hole (2a1) and the second gas outlet hole (5a) are the same.

3. The safety valve of the vehicle-mounted gas cylinder is characterized in that an adsorption strip (1c1) is arranged outside the gas outlet end (1c) of the valve body (1), the adsorption strip (1c1) is arranged at the contact position of the top cap (5) and the valve body (1), and a plurality of magnets (5c) are arranged at the bottom of the top cap (5).

4. The safety valve of the vehicle-mounted gas cylinder according to claim 1, characterized in that the upper part of the piston head (3) comprises a plugging end (3a), the section diameter of the plugging end (3a) is matched with that of the valve cavity (1a), the section diameter of the piston head (3) is matched with that of the gas inlet end (1b), and a plurality of gas inlet holes (3b) are arranged in the radial direction of the piston head (3).

5. The safety valve of an on-vehicle gas cylinder according to claim 4, characterized in that an annular sealing ring (3a1) is mounted on the peripheral side of the blocking end (3a), and the sealing ring (3a1) is attached to the inner wall of the valve chamber (1 a).

6. The safety valve of the vehicle-mounted gas cylinder is characterized in that the lower end of the inner nut (2) is provided with a concave first mounting cavity (2b), the upper part of the blocking end (3a) of the piston head (3) is provided with a concave second mounting cavity (3a2), and two ends of the spring (4) are respectively inserted into the first mounting cavity (2b) and the second mounting cavity (3a2) in a limiting and inserting mode.

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