阅读说明：本技术 一种高压氢气瓶安全释放阀 (Safety release valve for high-pressure hydrogen cylinder ) 是由 李均 白勇 迟明 付志勇 陈东晖 于 2021-03-09 设计创作，主要内容包括：本发明公开了一种高压氢气瓶安全释放阀,该高压氢气瓶安全释放阀内设置有压缩弹簧和调节螺帽,通过调节螺帽的上下调整,调节压缩弹簧压紧密封塞的压力,调整氢气瓶内压力达到泄压的上限,调节方便；同时该高压氢气瓶安全释放阀内设置有易熔密封件,温度低于熔点时,易熔密封件凝固保持密封塞密封出气口,防止氢气泄露,温度高于熔点时,易熔密封件熔化,氢气瓶内压力高于设定上限,密封塞会冲开,氢气从排气孔流出至氢气收集的管道,起到泄压作用,防止爆炸事故。(The invention discloses a safety release valve of a high-pressure hydrogen cylinder, wherein a compression spring and an adjusting nut are arranged in the safety release valve of the high-pressure hydrogen cylinder, the pressure of a sealing plug compressed by the compression spring is adjusted by adjusting the up-down adjustment of the adjusting nut, the pressure in the hydrogen cylinder is adjusted to reach the upper limit of pressure relief, and the adjustment is convenient; meanwhile, a fusible sealing element is arranged in the safety release valve of the high-pressure hydrogen cylinder, when the temperature is lower than the melting point, the fusible sealing element is solidified to keep the sealing plug to seal the gas outlet, so that hydrogen leakage is prevented, when the temperature is higher than the melting point, the fusible sealing element is melted, the pressure in the hydrogen cylinder is higher than a set upper limit, the sealing plug can be flushed away, and hydrogen flows out of the exhaust hole to a pipeline for collecting hydrogen, so that the pressure release effect is achieved, and explosion accidents are prevented.)

1. A high-pressure hydrogen cylinder safety release valve is characterized by comprising a valve block and a pressure release valve fixedly mounted on the valve block, wherein the pressure release valve comprises an external drainage cover and an internal valve core structure, the lower end of the drainage cover is fixedly connected with the valve block, the upper end of the drainage cover is provided with a pressure release outlet communicated with the inside, the pressure release outlet is provided with a connector connected with a pipeline for collecting hydrogen, the valve core structure comprises a mounting seat, a sealing plug, an easily-fusible sealing element, a compression spring and an adjusting nut, the sealing plug is tightly plugged with an air outlet of the valve block, the mounting seat is mounted on the outer side of the sealing plug and fixedly connected with the valve block, the mounting seat is in threaded connection with the adjusting nut capable of being adjusted up and down through threads, a ventilation channel communicated with the sealing plug is arranged in the mounting seat and the adjusting nut, the inner top of the adjusting nut, and a fusible sealing element is filled outside the sealing plug.

2. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the fusible seal is a fusible alloy.

3. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the mounting seat is fixedly connected to the valve block by threads.

4. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the lower end of the flow-guiding cover is threadedly connected to the valve block.

5. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the number of exhaust ports is three and is uniformly distributed laterally along the circumference.

6. The safety relief valve for high-pressure hydrogen cylinders as claimed in claim 1, wherein an internal thread is provided at the interface.

7. The safety release valve for high-pressure hydrogen cylinders as claimed in claim 4, wherein a fastening bayonet is provided at the threaded connection part of the outer side of the lower end of the flow guide cover and the valve block, and a sealing ring is sleeved on the fastening bayonet.

8. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the valve block is connected to a temperature sensor and a pressure sensor.

9. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein a combination valve seat is attached to the valve block.

10. The safety relief valve for high pressure hydrogen cylinders of claim 1, wherein the sealing plug is fixedly connected with a spacer ring, and vent holes are uniformly arranged on the outer side of the spacer ring along the circumference to communicate with the inner side of the spacer ring.

Technical Field

The invention relates to the technical field of safety valves, in particular to a safety release valve of a high-pressure hydrogen cylinder.

Background

With the increasing demand of human energy, non-renewable energy sources such as fossil fuel are about to face the danger of exhaustion, and the influence of fossil fuel on the environment cannot be ignored, so that the development and utilization of new energy sources become more and more urgent requirements, and hydrogen is a new energy source, is a worldwide recognized clean energy source, and is more and more concerned by people.

Meanwhile, hydrogen is a flammable and explosive gas, and when the hydrogen is mixed with fluorine, oxygen, carbon monoxide and air, the gas is in danger of explosion, and the hydrogen is usually compressed and stored in a special hydrogen cylinder, so that the pressure in the hydrogen cylinder is often higher, and during the storage and use of the hydrogen cylinder, if the temperature and the pressure in the hydrogen cylinder are too high due to the influence of the environment, the explosion is possibly caused, and thus safety accidents are caused.

Therefore, some hydrogen cylinder safety valves are designed in the prior art, chinese patent publication No. CN109099311A, publication No. 2018, 12 and 28, and disclose a hydrogen cylinder safety valve, which comprises a joint, a safety bolt, a drainage cover and a rupture disk, wherein a through hole is arranged on the joint along the upper and lower end directions, the safety bolt and the drainage cover are both connected to the upper end of the joint, the head of the safety bolt is located inside the drainage cover, a containing cavity is formed between the upper surface of the joint and the inner wall of the drainage cover, a connector communicated with the containing cavity is arranged on the drainage cover, a pore channel used for communicating the through hole with the containing cavity is arranged on the safety bolt, the rupture disk is located between the safety bolt and the joint and used for separating the through hole from the pore channel, and the pore channel is filled with fusible alloy. When the pressure and temperature in the hydrogen cylinder reach the bursting pressure of the rupture disk and the melting point of the fusible alloy respectively, the safety valve of the hydrogen cylinder automatically releases the pressure of the hydrogen in the hydrogen cylinder, so that the use safety of the hydrogen cylinder is improved, and safety accidents are avoided.

However, the explosion pressure of the safety valve of the hydrogen cylinder is limited and cannot be adjusted, and the application range is small.

Disclosure of Invention

In order to solve the technical problem, the invention designs a safety release valve of a high-pressure hydrogen cylinder.

The invention adopts the following technical scheme:

a high-pressure hydrogen cylinder safety release valve comprises a valve block and a pressure release valve fixedly mounted on the valve block, wherein the pressure release valve comprises an external drainage cover and an internal valve core structure, the lower end of the drainage cover is fixedly connected with the valve block, the upper end of the drainage cover is provided with a pressure release outlet communicated with the inside, the pressure release outlet is provided with a connector for connecting with a pipeline for collecting hydrogen, the valve core structure comprises a mounting seat, a sealing plug, a fusible sealing element, a compression spring and an adjusting nut, the sealing plug is tightly plugged with an air outlet of the valve block, the mounting seat is mounted on the outer side of the sealing plug and is fixedly connected with the valve block, the adjusting nut capable of being adjusted up and down through threads is in threaded connection on the mounting seat, a ventilation channel communicated with the sealing plug is arranged in the mounting seat and the adjusting nut, an exhaust hole communicated with the outside, and a fusible sealing element is filled outside the sealing plug.

Preferably, the fusible seal is made of a fusible alloy.

Preferably, the mounting seat is fixedly connected with the valve block through threads.

Preferably, the lower end of the drainage cover is in threaded connection with the valve block.

Preferably, the number of the exhaust ports is three and the exhaust ports are evenly distributed transversely along the circumference.

Preferably, an internal thread is provided at the interface.

Preferably, a fastening bayonet is arranged at the threaded connection position of the outer side of the lower end of the drainage cover and the valve block, and a sealing ring is sleeved on the fastening bayonet.

Preferably, a temperature sensor and a pressure sensor are connected to the valve block

Preferably, a combined valve seat is connected to the valve block.

Preferably, the sealing plug is fixedly connected with a separation ring, and vent holes communicated with the inner side of the separation ring are uniformly arranged on the outer side of the separation ring along the circumference.

The invention has the beneficial effects that: (1) the invention is provided with the compression spring and the adjusting nut, the pressure of the compression spring for pressing the sealing plug is adjusted through the up-and-down adjustment of the adjusting nut, the pressure in the hydrogen cylinder is adjusted to reach the upper limit of pressure relief, and the adjustment is convenient; (2) the invention is provided with the fusible sealing element, when the temperature is lower than the melting point, the fusible sealing element is solidified to keep the sealing plug to seal the air outlet, so that hydrogen leakage is prevented, when the temperature is higher than the melting point, the fusible sealing element is melted, the pressure in the hydrogen cylinder is higher than the set upper limit, the sealing plug can be flushed, and hydrogen flows out of the exhaust hole to a pipeline for collecting hydrogen, so that the pressure relief effect is realized, and the explosion accident is prevented.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of an installation structure of the pressure relief valve according to the present invention;

FIG. 3 is a schematic view of an internal structure of the adjusting nut of the present invention;

in the figure: 1. the device comprises a valve block, 2, a pressure release valve, 3, a drainage cover, 4, a mounting seat, 5, a sealing plug, 6, a fusible sealing element, 7, a vent hole, 8, a compression spring, 9, an adjusting nut, 10, a sealing ring, 11, a pressure release outlet, 12 and an exhaust hole.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b): as shown in attached figures 1-3, the high-pressure hydrogen cylinder safety release valve comprises a valve block 1 and a pressure release valve 2 fixedly installed on the valve block, wherein the pressure release valve comprises an external drainage cover 3 and an internal valve core structure, the lower end of the drainage cover is fixedly connected with the valve block, the upper end of the drainage cover is provided with a pressure release outlet 11 communicated with the inside, the pressure release outlet is provided with a connector connected with a pipeline for collecting hydrogen, the valve core structure comprises an installation seat 4, a sealing plug 5, a fusible sealing element 6, a compression spring 8 and an adjusting nut 9, the sealing plug is tightly plugged with an air outlet of the valve block, the installation seat is installed on the outer side of the sealing plug and is fixedly connected with the valve block, the installation seat is in threaded connection with an adjusting nut capable of being adjusted up and down through threads, ventilation channels communicated with the sealing plug are arranged in the installation seat and the adjusting nut, the inner top of the adjusting nut is, and a fusible sealing element is filled outside the sealing plug.

The fusible sealing element is made of fusible alloy. The mounting seat is fixedly connected with the valve block through threads. The lower end of the drainage cover is in threaded connection with the valve block. The number of the exhaust ports is three and is evenly distributed along the circumference in the transverse direction. The interface is provided with internal threads. The outer side of the lower end of the drainage cover and the threaded connection part of the valve block are provided with fastening bayonets, and sealing rings 10 are sleeved on the fastening bayonets. The valve block is connected with a temperature sensor and a pressure sensor. The valve block is connected with a combined valve seat. The sealing plug is fixedly connected with a separating ring, and the outer side of the separating ring is uniformly provided with vent holes 7 along the circumference to be communicated with the inner side of the separating ring.

When the safety release valve of the high-pressure hydrogen cylinder is used, the pressure of the compression spring pressing the sealing plug is adjusted through the up-and-down adjustment of the adjusting nut, the pressure in the hydrogen cylinder is adjusted to reach the upper limit of pressure release, and the adjustment is convenient; this high pressure hydrogen cylinder safety relief valve is provided with the fusible sealing member, and when the temperature was less than the melting point, the fusible sealing member solidified and kept the sealed gas outlet of sealing plug, prevents that hydrogen from revealing, and when the temperature was higher than the melting point, the fusible sealing member melted, and pressure was higher than and sets for the upper limit in the hydrogen cylinder, and the sealing plug can be washed away, and hydrogen flows out to the pipeline that hydrogen was collected from the exhaust hole, plays the pressure release effect, prevents the explosion accident.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.