Circumferential annular rupture disk

Abstract

The utility model discloses a circumferential type annular rupture disk which comprises an annular rupture disk body arranged on a main valve body of a one-way valve in a sleeved mode, a rupture film located on the axial side wall of the rupture disk body and a gas channel groove formed in the outer surface of the rupture disk body in the radial direction, and the gas channel groove is located on the outer side of the rupture film. The rupture disk is integrated into the bottleneck valve, and then the bottleneck valve is mounted on the hydrogen cylinder system, when the pressure in the gas cylinder is continuously increased and exceeds the upper limit value of the set bursting pressure of the rupture disk, the rupture film is ruptured, and high-pressure hydrogen in the gas cylinder is quickly discharged into the outside atmosphere through the discharge channel, so that the pressure of the gas cylinder is prevented from being continuously increased; and gas cylinder explosion or other serious accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure control and regulation, in particular to a circumferential annular bursting disc. Background Art

[0002] With the advancement of society, industrial development, and the improvement of people's living standards, the demand for energy is also increasing. Since current energy sources primarily come from fossil fuels such as coal, oil, and natural gas, which inevitably pollute the environment and are limited in reserves, the search for renewable, green energy sources is urgent. Hydrogen, as the cleanest energy source, has attracted widespread attention worldwide, and the number of hydrogen production projects is rapidly increasing. Hydrogen has been widely used in power generation, fuel cells, transportation, industry, the chemical industry, and other industries.

[0003] Utilizing hydrogen energy requires addressing the challenges of acquisition, storage, transportation, and application, with storage and transportation being crucial. Hydrogen typically exists in a gaseous state and is flammable, explosive, and easily diffused. This makes safe, efficient, and leak-free storage and transportation a top priority in practical applications, creating significant challenges. As a fuel, hydrogen is inherently dispersed and intermittent, necessitating solutions for storage and transportation.

[0004] As a precise pressure relief device, bursting discs play a key role in the storage and transportation of hydrogen. Bursting discs have the characteristics of sensitive action and large discharge area, which are very suitable for use in high-pressure hydrogen storage and transportation equipment with overpressure risks. However, the technical route of bursting discs in the existing technology is mainly flat thin discs or arched thin discs (both positive and negative arched). The main disadvantage of this type of result is that the installation space requirement is large. The diameter of the bottle mouth of the gas cylinder or pressure vessel limits the maximum blasting diameter of the bursting disc. When a traditional bursting disc explodes, the flat blasting area is usually a cross tear. Since the thin disc forms a flow restriction on the fluid after the cross tear, the actual effective flow area of ​​the cross tear is much smaller than the diameter of the bursting disc. This also greatly limits the discharge area and discharge volume of the traditional bursting disc.

[0005] For example, Chinese patent CN 202017877 U discloses a metal hydride hydrogen storage bottle assembly with a modular connection assembly. The assembly comprises a storage container, hydrogen storage material, a three-way fastening bolt, a single-bottle on / off valve, a bursting disc, a filter, a modular connection assembly, a main on / off valve, a sealing gasket, and a tie band. A bursting disc is mounted on the modular connection assembly. This metal hydride hydrogen storage bottle assembly can be used to connect several metal hydride hydrogen storage bottles into a single unit for hydrogen supply, using a modular connection assembly with a three-way fastening bolt. Alternatively, several units can be connected to form a larger unit to increase hydrogen supply, addressing current storage and supply challenges and meeting varying hydrogen demand requirements. Although this structure incorporates a bursting disc, it requires a clamp to secure the disc, and bolts, screws, or flanges are required to secure the clamp. This results in a complex installation structure and significant space requirements.

[0006] Another example is Chinese patent CN 118464124 A, which discloses a device and method for testing the hydrogen spontaneous combustion suppression performance of a blasting disc. The device comprises a device body, an opening state monitoring system, a shock wave monitoring system, and a data acquisition system. The device body is mounted on a bracket with a slide rail and includes a lens observation portion, a blasting portion, and a discharge portion, which are sequentially connected. The light source emitting end of the opening state monitoring system is located at the light source entrance of the lens observation portion, and the monitoring end of the opening state monitoring system is located at the light source exit of the discharge portion. The shock wave monitoring system is located outside the discharge portion, and the data acquisition system is electrically connected to the discharge portion. This application can simultaneously collect information such as blasting pressure, shock wave intensity, flame speed, and spontaneous combustion conditions during a single blast, thereby enabling a comprehensive, multi-faceted analysis of the mechanism by which the blasting disc affects hydrogen spontaneous combustion during the hydrogen discharge process. Although this technical solution meets the safety requirements of existing hydrogen storage and transportation equipment, when the size of the gas cylinder mouth has been determined, in special application scenarios, if it is necessary to increase the release volume after the explosion, the blasting diameter must be increased. However, traditional bursting discs are limited by their inherent structure and cannot increase the blasting diameter, so safety cannot be guaranteed. Utility Model Content

[0007] Purpose of the utility model: The purpose of the utility model is to address the deficiencies of the prior art and to provide a circumferential annular bursting disc that can be installed and used in a narrow space. When the size of the gas cylinder mouth is determined and the installation size of the bursting disc remains unchanged, the bursting diameter of the bursting disc can still be adjusted to increase the discharge volume after the explosion. This is an innovative bursting disc.

[0008] Technical solution: In order to achieve the above purpose, the utility model provides a circumferential annular bursting disc, which includes a gas cylinder, a one-way valve main valve body installed on the gas cylinder, and a bottle mouth valve installed on the outside of the one-way valve main valve body. It also includes: an annular bursting disc body sleeved on the one-way valve main valve body, a bursting film located on the axial side wall of the bursting disc body, and a gas channel groove radially arranged on the outer surface of the bursting disc body, the gas channel groove being located on the outside of the bursting film. By integrating the bursting disc into the bottle mouth valve and then installing it on the hydrogen cylinder system, when the pressure in the gas cylinder continues to increase and exceeds the upper limit of the bursting pressure set by the bursting disc, the bursting film ruptures, and the high-pressure hydrogen in the gas cylinder is quickly discharged into the outside atmosphere through the discharge channel, thereby avoiding the continuous increase in gas cylinder pressure, which may cause gas cylinder explosion or other serious accidents.

[0009] As a further preferred embodiment of the present invention, the angle at which the bursting disc is installed on the bursting disc body is set to β, the height is H, the inner diameter of the bursting disc body is D, and the effective area of ​​the annular blasting pressure relief is: the circumference of the sector-shaped annular disc corresponding to the circle × the height of the disc corresponding to the sector × the sector angle of the disc corresponding to the sector ÷ 360°, that is:

[0010] S = πD × H × β / 360;

[0011] As a further preferred embodiment of the present invention, when the inner diameter D of the bursting disc body is constant, the installation angle β of the bursting disc or the installation height H of the bursting disc is proportional to the effective pressure relief area S;

[0012] The inner diameter D of the bursting disc body is positively correlated with the maximum allowable flow diameter of the mounting hole. Assuming that for a gas cylinder with a constant bottle mouth diameter, the theoretical maximum value D is also approximately constant, then: by increasing the β angle and the film height H, the effective pressure relief flow area of ​​the bursting disc itself can be increased simultaneously, which has important application significance for special scenarios requiring rapid pressure relief after certain explosions. When the aperture D and height H remain unchanged, the effective relief area can also be enlarged simply by adjusting the β angle corresponding to the film, making the application scenarios of the present invention more flexible and efficient. However, in order to increase the effective pressure relief area of ​​traditional sheet-shaped bursting discs, it is only by increasing the diameter, which requires the addition of a clamp and a hole, so its application is very limited.

[0013] As a further preference of the present invention, the range of the installation angle β of the bursting membrane is between 5° and 120°.

[0014] As a further preferred embodiment of the present invention, the installation height H of the blasting film is in the range of 0.3D to 1.0D.

[0015] As a further preferred embodiment of the present invention, the inner surface of the annular bursting disc body is sleeved on the outer side of the one-way valve main body, and the outer surface of the annular bursting disc body is against the inner surface of the bottle mouth valve. When the size of the gas cylinder mouth has been determined, in special application scenarios, if it is necessary to increase the discharge volume after the explosion, then the explosion diameter must be increased, which overcomes the disadvantage that traditional bursting discs are limited by their inherent structure and cannot increase the explosion diameter.

[0016] As a further preferred embodiment of the present invention, after the bursting membrane on the annular bursting disc body ruptures, the gas in the gas cylinder sequentially passes through the one-way valve gas passage in the one-way valve main valve body and the ruptured bursting membrane into the gas passage groove, and then enters the exhaust passage on the bottle mouth valve through the gas passage groove and is discharged out of the gas cylinder to relieve the pressure of the gas cylinder.

[0017] The gas in the cylinder enters the inner cavity of the bottle valve through the porous media filter. The filter can be set or not according to the cleanliness of the gas. The filtration level is optional from 0.1 micron to 20 micron. The filtration level is selected according to the actual application requirements.

[0018] When there is no external outlet connector at the mouth of the gas cylinder, the one-way valve inside the bottle mouth valve is in a closed state due to the spring reset and the pressure difference between the inside and outside of the bottle. At this time, the pressure inside the bottle is equal to the pressure in the closed space inside the bottle mouth valve;

[0019] As a further preference of the present invention, the corners around the bursting film are bursting tearing areas where stress is concentrated. When the pressure in the gas cylinder exceeds the upper limit of the bursting pressure of the bursting disc due to fire or overfilling, the bursting film of the bursting disc is completely torn along the stress concentration areas at the corners around it, forming a bursting path. The high-pressure gas in the bottle is quickly released into the atmosphere along the bursting path, so that the pressure in the gas cylinder is quickly reduced and eventually completely released, thereby avoiding serious accidents such as gas cylinder rupture or bottle valve rupture.

[0020] As a further preferred embodiment of the present invention, the cross-sectional area ratio of the gas channel groove to the exhaust channel is between 0.5 and 2.

[0021] As a further optimization of the present invention, the inside of the gas cylinder is the high pressure side, and the bursting pressure of the bursting membrane is set to: the bursting pressure is equal to the water pressure test pressure value of the gas cylinder, but is less than the ultimate destruction pressure of the gas cylinder.

[0022] How it works

[0023] By integrating the bursting disc into the bottle mouth valve and then installing it on the hydrogen cylinder system, when the external temperature of the cylinder rises or it is overfilled, the pressure in the cylinder continues to rise. After exceeding the upper limit of the bursting pressure set by the bursting disc body, the gas in the cylinder passes through the one-way valve gas channel in the main valve body of the one-way valve, causing the stress concentration on the corners of the bursting film to burst and tear. The gas passes through the broken bursting film and enters the gas channel groove, and then enters the exhaust channel on the bottle mouth valve through the gas channel groove and is discharged out of the cylinder and quickly discharged into the outside atmosphere, thereby achieving pressure relief of the cylinder, thereby avoiding the continuous increase of cylinder pressure, which may lead to cylinder explosion or other serious accidents.

[0024] Beneficial effects: Compared with the prior art, the circumferential annular bursting disc provided by the present invention has the following advantages:

[0025] 1. By placing the bursting disc inside the outer circumference of the inlet and outlet channels, there is no need to open a special vent on the equipment to install the bursting disc. The structure is compact, the installation is simple, and no special clamp is required.

[0026] 2. When the size of the gas cylinder mouth and the bursting disc are determined, the discharge diameter and discharge area after the explosion can be increased by adjusting the area of ​​the annular film, thereby increasing the discharge volume;

[0027] 3. Since the bursting tearing area of ​​the bursting disc is the stress concentration area, that is, the edges and corners around the film, when it bursts, it will tear completely along the edges and corners instantly, ensuring the maximum instantaneous bursting discharge area, and thus the maximum discharge volume;

[0028] 4. The structure of the rupture disc is easy to process and has low manufacturing cost, which makes it easy to realize rapid mass production at low cost. The ring-shaped circular structure can be processed by precision CNC lathes, which improves the blasting accuracy.

[0029] 5. It has strong adaptability. It does not require molds to meet different discharge volume requirements and different gas cylinder mouth sizes. It can be quickly sampled through precision lathes, which has important social significance for reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the utility model;

[0031] Figure 2 It is a full cross-sectional view of the utility model;

[0032] Figure 3 It is a partial view of the utility model;

[0033] Figure 4 This is a schematic diagram of the installation of the utility model;

[0034] Figure 5This is a partial enlarged view of the utility model after installation;

[0035] Figure 6 This is a schematic diagram of the gas flow before the blasting film explodes;

[0036] Figure 7 Schematic diagram of gas flow after the blasting film explodes. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] like Figure 1 、 Figure 2 、 Figure 3 As shown, the circumferential annular bursting disc of the present invention comprises: a bursting disc body 1, a bursting film 2, a gas passage groove 3, a one-way valve main body 4, a bottle mouth valve 5 and a gas cylinder 6.

[0039] like Figure 4 、 Figure 5 As shown, the bottle-mouth valve 5 is mounted on the outside of the one-way valve main valve body 4, which is fixed to the gas cylinder 6. The inner surface of the annular bursting disc body 1 is sleeved on the outside of the one-way valve main valve body 4, and the outer surface of the annular bursting disc body 1 abuts against the inner surface of the bottle-mouth valve 5. The bursting disc 2 is located on the axial side wall of the bursting disc body 1. The gas passage groove 3 is radially provided on the outer surface of the bursting disc body 1, and the gas passage groove 3 is located on the outside of the bursting disc 2.

[0040] Example

[0041] like Figure 6 The figure shows the gas flow before the bursting disc explodes. The gas in the gas cylinder 6 passes through the porous medium filter and enters the inner cavity of the cylinder valve. At this time, the pressure difference between the inside and outside of the gas cylinder 6 is less than the limit value. After entering the one-way valve gas passage 44 on the one-way valve core 41, the gas is blocked by the bursting disc 2 on the bursting disc body 1, and the gas is confined to the bottle.

[0042] like Figure 7 The figure shows the gas flow after the bursting disc bursts. When the external temperature of the gas cylinder 6 rises or the gas cylinder 6 is overfilled, the pressure in the gas cylinder 6 continues to rise. After exceeding the upper limit of the bursting pressure set in the bursting disc body 1, the gas in the gas cylinder 6 passes through the one-way valve gas passage 44 in the one-way valve main valve body 4 under the action of pressure, bursting and tearing the corners of the bursting disc 2. The gas passes through the ruptured bursting disc 2 and enters the gas passage groove 3. The gas flows in the gas passage groove 3 of the rotating structure, and then enters the exhaust passage 51 on the bottle mouth valve 5 through the gas passage groove 3. After being discharged from the gas cylinder 6, it is quickly discharged into the outside atmosphere, achieving pressure relief for the gas cylinder 6, thereby preventing the continuous increase in gas cylinder pressure from causing the gas cylinder 6 to explode or other serious accidents.

[0043] This technical solution was tested and blasted hundreds of times, verifying and reproducing the prediction of the explosion of the blasting membrane 2 relative to the inner aperture D of the blasting disc body. It was also verified that during the explosion, the gas was completely and instantly torn along the four edges and corners of the blasting membrane 2, achieving the maximization of the blasting discharge area, thereby ensuring the maximization of the discharge volume.

[0044] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A circumferential annular bursting disc comprising a gas cylinder (6), a one-way valve main valve body (4) mounted on the gas cylinder (6), and a bottle mouth valve (5) mounted outside the one-way valve main valve body (4), characterized in that: It also includes: an annular bursting disc body (1) sleeved on a main valve body (4) of a one-way valve, a bursting film (2) located on the axial side wall of the bursting disc body (1), and a gas passage groove (3) radially arranged on the outer surface of the bursting disc body (1), wherein the gas passage groove (3) is located outside the bursting film (2).

2. A circumferential annular bursting disc according to claim 1, characterized in that: The angle of the bursting film (2) installed on the bursting disc body (1) is set to β, the height is H, the inner diameter of the bursting disc body (1) is D, and the effective area of ​​the annular bursting pressure relief is: S = πD × H × β / 360.

3. A circumferential annular bursting disc according to claim 2, characterized in that: When the inner diameter D of the bursting disc body (1) is constant, the installation angle β of the bursting disc (2) or the installation height H of the bursting disc (2) is proportional to the effective pressure relief area S.

4. A circumferential annular bursting disc according to claim 2, characterized in that: The installation angle β of the bursting film (2) ranges from 5° to 120°.

5. The circumferential annular bursting disc according to claim 2, characterized in that: The installation height H of the bursting film (2) ranges from 0.3D to 1.0D.

6. A circumferential annular bursting disc according to claim 1, characterized in that: The inner surface of the annular bursting disc body (1) is sleeved on the outer side of the one-way valve main valve body (4), and the outer surface of the annular bursting disc body (1) abuts against the inner surface of the bottle mouth valve (5).

7. A circumferential annular bursting disc according to claim 6, characterized in that: After the bursting film (2) on the annular bursting disc body (1) is ruptured, the gas in the gas cylinder (6) passes through the one-way valve gas passage (44) in the one-way valve main valve body (4) and the ruptured bursting film (2) in sequence and enters the gas passage groove (3), then enters the exhaust passage (51) on the bottle mouth valve (5) through the gas passage groove (3) and is discharged out of the gas cylinder (6) to achieve pressure relief of the gas cylinder (6).

8. A circumferential annular bursting disc according to claim 7, characterized in that: The cross-sectional area ratio of the gas channel groove (3) and the exhaust channel (51) is between 0.5 and 2.

9. The circumferential annular bursting disc according to claim 1, characterized in that: The bursting pressure of the bursting film (2) is set to be equal to the water pressure test pressure value of the gas cylinder (6), but less than the ultimate breaking pressure of the gas cylinder (6).

10. The circumferential annular bursting disc according to claim 1, characterized in that: The corners around the blasting film (2) are blasting and tearing areas where stress is concentrated.

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