阅读说明：本技术 一种过滤溢流阀装置 (Filtering overflow valve device ) 是由 顾成杰 刘绍军 李冬梅 林垚 于 2019-12-04 设计创作，主要内容包括：本发明公开了一种过滤溢流阀装置,涉及高压氢气集成瓶阀的技术领域,包括溢流阀和10μm过滤器,溢流阀包括溢流阀阀体、放气管、阀芯、弹簧和溢流阀阀盖,放气管和溢流阀阀盖分别设置在溢流阀阀体的两端,阀芯设置在溢流阀阀体的腔室内,阀芯的一端设有密封堵头,阀芯的侧壁上开设有通孔,弹簧套设在阀芯上；10μm过滤器包括喷嘴和过滤网,喷嘴螺纹连接于溢流阀阀盖上远离阀芯的一端,过滤网卡设在喷嘴和溢流阀阀盖之间。本发明的过滤溢流阀装置当高压氢气集成瓶阀的通路流量过大时,自动密封气体通路,适用于70MPa高压氢气集成瓶阀,喷嘴的气体通道四倾斜设置,使氢气在加注时以一定的角度射入气瓶,优化气瓶温场分布,降低气瓶的温升。(The invention discloses an overflow valve filtering device, which relates to the technical field of high-pressure hydrogen integrated cylinder valves and comprises an overflow valve and a 10-micron filter, wherein the overflow valve comprises an overflow valve body, an air release pipe, a valve core, a spring and an overflow valve bonnet; the 10-micron filter comprises a nozzle and a filter screen, the nozzle is in threaded connection with one end of the overflow valve cover far away from the valve core, and the filter screen is arranged between the nozzle and the overflow valve cover. The filtering overflow valve device disclosed by the invention can automatically seal a gas passage when the passage flow of the high-pressure hydrogen integrated cylinder valve is overlarge, and is suitable for a 70MPa high-pressure hydrogen integrated cylinder valve.)

1. A filtering spill valve device comprising a spill valve and a 10 μm filter, wherein:

the overflow valve comprises an overflow valve body (1), an air release pipe (2), a valve core (3), a spring (4) and an overflow valve cover (5), the air release pipe (2) and the overflow valve cover (5) are respectively arranged at two ends of the overflow valve body (1), the valve core (3) is arranged in a cavity of the overflow valve body (1), a first gas channel (11) is arranged in the cavity of the overflow valve body (1), the first gas channel (11) is positioned between the valve core (3) and the gas release pipe (2), one end of the valve core (3) close to the first gas channel (11) is provided with a sealing plug (31), a second gas channel (32) is formed in the valve core (3), a through hole (33) is arranged on the side wall of the valve core (3), the spring (4) is sleeved on the valve core (3), and a third gas channel (51) is formed in the overflow valve cover (5);

the 10-micrometer filter comprises a nozzle (6) and a filter screen (7), the nozzle (6) is in threaded connection with one end, far away from the valve core (3), of the overflow valve cover (5), the filter screen (7) is clamped between the nozzle (6) and the overflow valve cover (5), and a gas channel four (61) is formed in the nozzle (6).

2. The filtering overflow valve device according to claim 1, wherein the filter screen (7) is shaped like a hemisphere, the outer edge of the filter screen (7) is bent to form a fixing part (71), and the fixing part (71) is clamped between the nozzle (6) and the overflow valve cover (5).

3. The filtering overflow valve device according to claim 2, wherein the filter screen (7) comprises a wire mesh and a 10 μm filter screen (7), and the wire mesh is attached to the 10 μm filter screen (7).

4. The filtering overflow valve device according to claim 1, wherein the central axis of the first gas passage (11), the central axis of the second gas passage (32) and the central axis of the third gas passage (51) are coincident, and the central axis of the fourth gas passage (61) and the central axis of the third gas passage (51) form an included angle.

5. The filtering overflow valve device according to claim 1, wherein a first annular step is arranged on the outer side wall of one end of the valve core (3) close to the overflow valve bonnet (5), a second annular step is arranged in a cavity of the overflow valve body (1), the valve core (3), the first annular step, the overflow valve body (1) and the second annular step enclose a cavity, and the spring (4) is arranged in the cavity.

6. The filtering overflow valve device according to claim 1, wherein a groove is formed in the outer wall of the gas release pipe (2), and an O-shaped ring (21) is sleeved in the groove.

7. A filtering overflow valve device according to claim 1, wherein the bleed pipe (2) and the overflow valve bonnet (5) are both in threaded connection with the overflow valve body (1).

8. The filtering overflow valve device according to claim 1, wherein the gas release pipe (2) is communicated with the first gas passage (11), and the through hole (33), the second gas passage (32), the third gas passage (51) and the fourth gas passage (61) are communicated in sequence.

Technical Field

The invention relates to the technical field of high-pressure hydrogen integrated cylinder valves, in particular to a filtering overflow valve device.

Background

The high-pressure hydrogen integrated cylinder valve is arranged on a hydrogen storage cylinder of a fuel cell automobile and used for controlling the on-off of hydrogen in the hydrogen storage cylinder. In view of safety, weight reduction, and cost reduction of the hydrogen fuel cell vehicle, and reduction of leakage points, the more functions the cylinder valve for the vehicle has, the fewer valves and pipes are required for the front end pipe of the fuel cell. The highly integrated cylinder valve is the optimal scheme of the whole vehicle.

The filter can block solid particles or impurities in the gas and protect the fuel cell system. The overflow valve is an important safety part of the high-pressure hydrogen pipeline system and can be started when the pipeline at the rear end is broken, so that the leakage of a large amount of high-pressure hydrogen is cut off. The filter and the overflow valve are arranged between the cylinder valve and the fuel cell, and if a pipeline at the front end of the overflow valve is broken, the overflow valve cannot play a role in safety protection. Moreover, an overflow valve and a filter which can bear high-pressure hydrogen have high cost, large volume and certain leakage risk.

Disclosure of Invention

In view of the above-mentioned problems, an object of the present invention is to provide a filtering relief valve device to be mounted inside a gas cylinder.

In order to achieve the purpose, the invention adopts the technical scheme that:

a filtering overflow valve device comprises an overflow valve and a 10 mu m filter, wherein the overflow valve comprises an overflow valve body, an air release pipe, a valve core, a spring and an overflow valve cover, the air release pipe and the overflow valve cover are respectively arranged at two ends of the overflow valve body, the valve core is arranged in a cavity of the overflow valve body, a first gas channel is arranged in the cavity of the overflow valve body, the first gas channel is positioned between the valve core and the air release pipe, a sealing plug is arranged at one end of the valve core close to the first gas channel, a second gas channel is formed inside the valve core, a through hole is formed in the side wall of the valve core, the spring is sleeved on the valve core, one end of the valve core abuts against the overflow valve body, and a third gas channel is formed in the overflow valve cover; the 10-micron filter comprises a nozzle and a filter screen, the nozzle is arranged at one end, far away from the valve core, of the overflow valve cover, the nozzle is in threaded connection with the overflow valve cover, the filter screen is clamped between the nozzle and the overflow valve cover, and a gas channel IV is formed in the nozzle.

The overflow valve filtering device is characterized in that the filter screen is hemispherical, the outer edge of the filter screen is bent to form a fixing part, and the fixing part is clamped between the nozzle and the valve cover of the overflow valve.

The overflow valve filtering device is characterized in that the filter screen comprises a metal wire mesh and a 10 μm filter screen, and the metal wire mesh is attached to the 10 μm filter screen.

In the overflow valve filtering device, the central axis of the first gas channel, the central axis of the second gas channel and the central axis of the third gas channel are coincident, and an included angle is formed between the central axis of the fourth gas channel and the central axis of the third gas channel.

The overflow valve filtering device is characterized in that a first annular step is arranged on the outer side wall of one end, close to the valve cover, of the valve core, a second annular step is arranged in the cavity of the valve body of the overflow valve, the valve core, the first annular step, the valve body of the overflow valve and the second annular step form a cavity in a surrounding mode, and the spring is arranged in the cavity.

In the overflow valve filtering device, a groove is formed in the outer wall of the air release pipe, and an O-shaped ring is sleeved in the groove.

In the overflow valve filtering device, the air release pipe and the overflow valve cover are both in threaded connection with the overflow valve body.

In the overflow valve filtering device, the air release pipe is communicated with the first gas channel, and the through hole, the second gas channel, the third gas channel and the fourth gas channel are sequentially communicated.

Due to the adoption of the technology, compared with the prior art, the invention has the following positive effects:

1. when the flow of the passage of the high-pressure hydrogen integrated cylinder valve is overlarge, the overflow valve automatically seals the gas passage, so that the hydrogen is prevented from volatilizing to cause explosion accidents, and the filtering overflow valve device is suitable for the 70MPa high-pressure hydrogen integrated cylinder valve.

2. The gas channel of the nozzle of the filtering overflow valve is arranged in a four-inclined way, so that high-pressure hydrogen is injected into the gas cylinder at a certain angle when the hydrogen is filled, the temperature field distribution of the gas cylinder can be optimized, the temperature rise of the gas cylinder during filling is reduced, the service life of the gas cylinder is prolonged, and the safety of the gas cylinder is improved.

Drawings

FIG. 1 is a cross-sectional view of a filtered relief valve assembly of the present invention;

FIG. 2 is a schematic view of the filter relief valve assembly of the present invention with the valve element closed;

fig. 3 is a schematic view of the combination of the filtering overflow valve device and the valve body of the present invention.

In the drawings: 1. an overflow valve body; 11. a first gas channel; 2. discharging the air pipe; 21. an O-shaped ring; 3. a valve core; 31. sealing the plug; 32. a second gas channel; 33. a through hole; 4. a spring; 5. an overflow valve cover; 51. a gas channel III; 6. a nozzle; 61. a gas channel IV; 7. a filter screen; 71. a fixed part; 8. a valve body.

Detailed Description

The invention aims to provide a filtering overflow valve device which is arranged in a valve body of a high-pressure hydrogen integrated cylinder valve, and the high-pressure hydrogen integrated cylinder valve is arranged on a hydrogen storage cylinder of a fuel cell automobile.

The invention will be further described with reference to the accompanying drawings and specific embodiments, but not to be construed as limiting the invention, wherein fig. 1 is a cross-sectional view of a filtered relief valve assembly of the present invention; fig. 2 is a schematic view of the combination of the filtering overflow valve device and the valve body of the present invention.

Referring to fig. 1, a first preferred filtering relief valve assembly is shown, comprising: an overflow valve and a 10 mu m filter, the overflow valve comprises an overflow valve body 1, an air release pipe 2, a valve core 3, a spring 4 and an overflow valve bonnet 5, one end of the air release pipe 2 is inserted into the interior of one end of the overflow valve body 1, the air release pipe 2 is in threaded connection with the overflow valve body 1, the other end of the overflow valve body 1 is inserted into the overflow valve bonnet 5, the overflow valve body 1 is in threaded connection with the overflow valve bonnet 5, a cavity is arranged inside the overflow valve body 1, the valve core 3 is arranged in the cavity of the overflow valve body 1, a gas channel I11 is arranged in the cavity of the overflow valve body 1, the gas channel I11 is positioned between the valve core 3 and the air release pipe 2, the central axis of the gas channel I11 is coincided with the central axis of the overflow valve body 1, one end of the valve core 3 close to the gas channel I11 is provided, through holes 33 are formed in the side wall of the valve core 3 along the radial direction of the valve core, the number of the through holes 33 is four, the four through holes 33 are evenly distributed along the circumferential direction of the valve core 3, the four through holes 33 are communicated with a second gas channel 32, the spring 4 is sleeved on the valve core 3, a third gas channel 51 is formed in the overflow valve cover 5, and the second gas channel 32 is communicated with the third gas channel 51.

The 10-micron filter comprises a nozzle 6 and a filter screen 7, the nozzle 6 is connected to one end, far away from the valve core 3, of the overflow valve cover 5 in a threaded mode, the filter screen 7 is clamped between the nozzle 6 and the overflow valve cover 5, and the nozzle 6 is provided with a gas channel four 61.

Referring to fig. 2, when the flow of hydrogen flowing through the overflow valve from the 10 μm filter is too large, the hydrogen pushes the valve element 3 to move toward the first gas passage 11, and at the same time, the valve element 3 compresses the spring 4, the sealing plug 31 of the valve element 3 seals the first gas passage 11, so that the hydrogen flowing through the overflow valve is cut off, thereby avoiding the risk of hydrogen leakage and enhancing the safety of the hydrogen storage cylinder.

Referring to fig. 1 and fig. 3, in order to further optimize the above embodiment, one end of the gas release pipe 2, which is far away from the relief valve body 1, is connected in the valve body 8 of the high-pressure hydrogen integrated cylinder valve by a thread, a groove is formed in the outer wall of the gas release pipe 2, an O-ring 21 is sleeved in the groove for sealing between the valve body 8 and the gas release pipe 2, and the relief valve body 1, the relief valve cover 5 and the 10 μm filter are all located outside the valve body 8 of the high-pressure hydrogen integrated cylinder valve.

Further, the shape of filter screen 7 is the hemisphere, can effectively increase filter area and hydrogen flow area, avoid the flow not enough, the outer fringe bending type of filter screen 7 forms fixed part 71, fixed part 71 card is established between nozzle 6 and overflow valve gap 5, filter screen 7 adopts two-layer composite structure, filter screen 7 includes wire mesh and 10 μm filter screen 7, wire mesh and 10 μm filter screen 7 laminate mutually, 10 μm filter screen 7 sets up in the one side of being close to nozzle 6, the wire mesh setting plays the supporting role in the one side of being close to overflow valve gap 5, can guarantee holistic intensity.

Compared with the prior art, the built-in filtering overflow valve device provided by the invention is arranged on the high-pressure hydrogen integrated cylinder valve and is positioned in the hydrogen storage cylinder, the inside and the outside of the overflow valve body 1 are in an isobaric environment, the pressure strength and the high-pressure sealing of the overflow valve body 1 are not required to be considered, and the risk of hydrogen leakage is avoided. The overflow valve in the prior art is arranged on a pipeline and can only play a role when the pipeline at the rear end of the overflow valve is broken, and the overflow valve disclosed by the invention can play a protection role no matter the pipeline at any position in the high-pressure hydrogen integrated cylinder valve is damaged or the high-pressure hydrogen integrated cylinder valve is damaged because the overflow valve is arranged in the hydrogen storage cylinder, so that the safety coefficient of a fuel cell automobile is greatly improved.

In addition, the central axis of the first gas channel 11, the central axis of the second gas channel 32 and the central axis of the third gas channel 51 are coincided, an included angle is formed between the central axis of the fourth gas channel 61 and the central axis of the third gas channel 51, the fourth gas channel 61 is arranged on the nozzle 6 in an inclined mode at a preset angle, and high-pressure hydrogen is injected into the gas cylinder at a certain angle when the hydrogen storage gas cylinder is filled with the hydrogen.

Further, the outer side wall of one end, close to the overflow valve cover 5, of the valve core 3 is provided with a first annular step, a second annular step is arranged in a cavity of the overflow valve body 1, the second annular step is located between the first annular step and the first gas channel 11, the first annular step is opposite to the second annular step, the valve core 3, the first annular step, the overflow valve body 1 and the second annular step form a closed cavity in a surrounding mode, the spring 4 is arranged in the cavity, one end of the spring 4 abuts against the first annular step, and the other end of the spring 4 abuts against the second annular step.

Further, the gas release pipe 2 is communicated with the gas channel I11, the through hole 33, the gas channel II 32, the gas channel III 51 and the gas channel IV 61 are sequentially communicated to form a gas passage, and when hydrogen is filled, gas in the valve body 8 of the high-pressure hydrogen integrated cylinder valve sequentially enters the hydrogen storage cylinder through the gas release pipe 2, the gas channel I11, the through hole 33, the gas channel II 32, the gas channel III 51 and the gas channel IV 61.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.