A large-diameter hydrogen bundle type container relief device

Abstract

A large pass hydrogen gas bundle type container relief device relates to pressure relief device technical field, containing valve body, burst valve assembly and glass temperature sensing valve assembly, valve body is right angle structure, gas cylinder interface and discharge interface are arranged at right angles, main discharge gas path and discharge branch adopt right angle bending design, burst valve assembly is installed in right angle bending place of discharge branch, contains burst piece, pressure ring and plug, glass temperature sensing valve assembly is installed in right angle bending part of valve body, contains valve seat, valve core, glass temperature sensing column and plug body, valve core is slidably inserted in valve seat, glass temperature sensing column breaks when temperature is too high, opens main discharge gas path, realizes large flow fast discharge, the invention forms double protection mechanism through the synergistic effect of burst valve assembly and glass temperature sensing valve assembly, can carry out large flow pressure relief when pressure or temperature is abnormal, significantly improves the safety and reliability of system, is especially suitable for hydrogen gas bundle type container and other high-risk environment.

Description

Technical Field

[0001] This invention relates to the field of pressure relief devices, and in particular to a pressure relief device for a large-diameter hydrogen tubular container. Background Technology

[0002] Currently, hydrogen tubular containers are an important transportation equipment for hydrogen. Due to their large volume, high pressure, and potential leakage of hydrogen during storage and transportation, tubular containers must be equipped with pressure relief devices to ensure safe release of hydrogen under conditions of excessive temperature and pressure.

[0003] The structural forms of safety relief devices for hydrogen tubular containers, both domestically and internationally, are individual rupture elements, individual fusible plugs, or a combination of rupture elements and fusible plugs in series. Individual rupture element structures cannot meet the safety relief requirements of the tubular container under overheating conditions; individual fusible plug structures, besides failing to meet the safety relief requirements under overpressure, also suffer from defects such as poor compressive strength and creep resistance of the fusible plug itself; the combination of rupture elements and fusible plugs in series requires both pressure and temperature to exceed a set value for safe relief, posing a safety hazard. None of the above three methods can meet the safety relief requirements caused by individually excessive pressure and temperature, and the aforementioned relief devices also have relatively small diameters. Therefore, developing a high-pressure, large-diameter, and large-volume hydrogen tubular container relief device driven by both temperature and pressure (safe relief when both temperature and pressure reach a set value) is an urgent problem to be solved. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention discloses a venting device for a large-diameter hydrogen tube bundle container.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A venting device for a large-diameter hydrogen tube bundle container includes a valve body with a right-angle structure. One corner of the valve body is a gas cylinder interface, and the other corner is a discharge interface. A right-angle main discharge gas path is provided between the gas cylinder interface and the discharge interface, and a right-angle discharge branch is connected in parallel to the main discharge gas path.

[0007] The burst valve assembly is installed at the right-angle bend of the valve body corresponding to the discharge branch. It is used to close the discharge branch and open when the pressure exceeds the set value to discharge a small flow rate.

[0008] The glass temperature-sensing valve assembly is installed at the right-angle bend of the valve body. It is used to close the main exhaust gas path. When the temperature exceeds the set value, it opens under the action of airflow pressure in the exhaust branch to discharge a large flow rate.

[0009] Preferably, the rupture valve assembly comprises:

[0010] A bursting component, installed on the discharge branch of the valve body, is used to seal the discharge branch;

[0011] A pressure ring is used to position the explosive component. The center hole of the pressure ring is coaxial with the discharge branch. Multiple secondary channels corresponding to and communicating with the center hole are provided at intervals along the circumferential direction on the outer side of the pressure ring, and annular grooves are provided on the valve body at the positions corresponding to the secondary channels.

[0012] The plug, installed on the valve body, is used to tighten the pressure ring and seal the bursting element.

[0013] Preferably, an annular copper gasket is provided between the rupture component and the valve body.

[0014] Preferably, the blasting component adopts a positive arch structure.

[0015] Preferably, the glass temperature sensing valve assembly includes:

[0016] The valve seat is installed at the right-angle bend of the valve body, and the valve seat body has multiple openings spaced around it in the circumferential direction.

[0017] The valve core is slidably inserted into the valve cavity of the valve seat to cut off the passage between the valve cavity and the opening of the valve seat, and the valve core is perpendicular to a section of the gas cylinder interface corresponding to the main exhaust gas path.

[0018] A glass temperature sensing column is located inside the valve cavity of the valve seat and is used to limit the position of the valve core.

[0019] The plug body, which is threaded to the valve body, is used to press the valve seat and position the glass temperature sensing column.

[0020] Preferably, the valve core has a recessed cavity at one end corresponding to the discharge port.

[0021] Preferably, the valve seat and valve body, as well as the valve core and valve seat, are sealed using a double sealing ring structure.

[0022] Preferably, a straight connector is installed at the discharge port end of the valve body.

[0023] By employing the technical solution described above, the present invention has the following beneficial effects:

[0024] This invention discloses a large-diameter hydrogen tube bundle type container venting device, which has a simple structure and is easy to assemble. The valve body adopts a right-angle structure design, with the gas cylinder interface and the discharge interface arranged at right angles. Both the main discharge gas path and the discharge branch path adopt right-angle bend structures. This design not only optimizes the internal airflow path but also makes the overall layout more compact, adapting to the installation requirements of confined spaces. The right-angle bend structure of the valve body facilitates the installation of the burst valve assembly and the glass temperature sensing valve assembly. At the same time, the straight-through connector ensures reliable connection between the discharge interface and the external discharge gas path, further improving the convenience of installation.

[0025] This invention utilizes the synergistic effect of the burst valve assembly and the glass temperature sensing valve assembly to enable the device to release pressure at small and large flow rates respectively when pressure or temperature is abnormal, forming a dual protection mechanism that significantly improves the safety and reliability of the system.

[0026] This invention further arranges the valve core perpendicularly to a section of the gas cylinder interface corresponding to the main discharge gas path. This design effectively balances the pressure borne by the valve core, preventing accidental opening of the glass temperature sensing column due to excessive pressure under normal conditions. Simultaneously, a recessed cavity is provided at one end of the valve core corresponding to the discharge interface, making it more susceptible to the pressure of the hydrogen gas flow, ensuring a rapid response after the discharge branch opens, further enhancing the device's pressure resistance and response speed. The glass temperature sensing column is located within the sealed space between the valve core and the plug; any glass fragments generated after breakage will not enter the main discharge gas path, avoiding any impact on normal venting function and further improving the device's reliability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the rupture valve assembly;

[0029] Figure 3 This is a schematic diagram of the glass temperature sensing valve assembly.

[0030] In the diagram: 1. Valve body; 2. Rupture valve assembly; 2-1. Rupture component; 2-2. Pressure ring; 2-3. Plug; 2-4. Annular copper gasket; 3. Glass temperature sensing valve assembly; 3-1. Valve seat; 3-2. Valve core; 3-3. Glass temperature sensing column; 3-4. Plug; 4. Straight-through connector. Detailed Implementation

[0031] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation.

[0032] Example 1, in conjunction with Appendix Figures 1-3A large-diameter hydrogen tube bundle container venting device includes a valve body 1, a burst valve assembly 2, and a glass temperature-sensing valve assembly 3. The valve body 1 adopts a right-angle structure, with one corner serving as a gas cylinder interface and the other as a discharge interface. A right-angled main discharge gas path is provided between the gas cylinder interface and the discharge interface, and a right-angled branch discharge path is connected in parallel to the main discharge gas path. This right-angle bend design not only optimizes the internal airflow path but also makes the overall structure more compact, facilitating installation in confined spaces.

[0033] Valve body 1 is made of 6061 aluminum alloy, which has the advantages of good compatibility with hydrogen and light weight, meeting the requirements of hydrogen tubular containers. 6061 aluminum alloy also has high strength and corrosion resistance, maintaining stable performance in harsh environments. A straight-through connector 4 is installed at the discharge port end of valve body 1 to facilitate reliable connection between the discharge port and the external discharge gas path. The design of the straight-through connector 4 ensures the sealing and stability of the connection, preventing hydrogen leakage.

[0034] The rupture valve assembly 2 is installed at the right-angle bend of the corresponding discharge branch on the valve body 1 to close the discharge branch. When the pressure exceeds the set value, the rupture valve assembly 2 will automatically open to discharge at a small flow rate. Specifically, the rupture valve assembly 2 includes a rupture element 2-1, a pressure ring 2-2, and a plug 2-3.

[0035] As attached Figure 2 As shown, the valve body 1 has a mounting hole for the burst valve assembly 2 at the right-angle bend corresponding to the discharge branch. The bursting element 2-1 is installed at the bottom of the hole, and an annular copper gasket 2-4 is placed between the bursting element 2-1 and the bottom of the hole to ensure a sealing effect. The design of the annular copper gasket 2-4 can effectively disperse pressure and avoid sealing failure caused by local stress concentration.

[0036] The rupture element 2-1 has a pressure ring 2-2 at its top, and the central hole of the pressure ring 2-2 is coaxial with the discharge branch. Multiple secondary channels communicating with its central hole are spaced circumferentially along the outer side of the pressure ring 2-2, and annular grooves are provided on the valve body 1 at the corresponding positions of the secondary channels. A plug 2-3 is installed at the opening of the mounting hole on the valve body 1. The plug 2-3 presses the pressure ring 2-2, which in turn further presses the rupture element 2-1, thereby ensuring that the rupture element 2-1 can reliably seal the discharge branch.

[0037] When the pressure inside the container gas cylinder exceeds the predetermined value When the pressure reaches its limit, the rupture element 2-1 ruptures. Hydrogen gas enters the central hole of the pressure ring 2-2 along the discharge branch, flows through the gap between the secondary channel and the annular groove of the valve body 1, and finally exits from the discharge port of the valve body 1, thus achieving the pressure relief function. The rupture element 2-1 adopts a positive arch structure design, which can distribute the force evenly when the pressure reaches the set value, ensuring the reliability and consistency of the rupture.

[0038] A glass temperature-sensing valve assembly 3 is installed at the right-angle bend of the valve body 1 to close the main exhaust gas path. When the temperature exceeds the set value, the glass temperature-sensing valve assembly 3 opens under the action of the airflow pressure in the exhaust branch, allowing for a large flow of gas discharge. Specifically, the glass temperature-sensing valve assembly 3 includes a valve seat 3-1, a valve core 3-2, and a glass temperature-sensing column 3-3.

[0039] As attached Figure 3 As shown, the right-angle bend of valve body 1 has a mounting cavity, and valve seat 3-1 is installed in this mounting cavity. The valve cavity of valve seat 3-1 faces the discharge port of valve body 1, and the seat body of valve seat 3-1 has multiple openings at intervals along the circumference that communicate with its valve cavity. A valve core 3-2 is slidably inserted into the valve cavity of valve seat 3-1, and the valve core 3-2 can cut off the passage between the valve cavity of valve seat 3-1 and its openings. The valve core 3-2 is arranged perpendicularly to a section of the main discharge gas path corresponding to the gas cylinder interface. Under normal conditions, the hydrogen in the main discharge gas path only acts radially on the valve core 3-2 and does not generate axial pressure on the valve core 3-2.

[0040] A glass temperature-sensing column 3-3 is installed inside the valve cavity of valve seat 3-1 to limit the position of valve core 3-2. Valve body 1 is connected to plug 3-4 via threads. Plug 3-4 is used to press valve seat 3-1 and position glass temperature-sensing column 3-3. Glass temperature-sensing column 3-3 ruptures when the temperature reaches 110℃, losing its limiting function for valve core 3-2.

[0041] Normally, when the temperature inside the container gas cylinder rises, the internal hydrogen pressure increases first. When the pressure reaches 68 MPa, the discharge branch opens. When the temperature inside the container gas cylinder exceeds 110°C, the glass temperature sensing column 3-3 breaks. Since the hydrogen flow in the discharge branch can enter the corresponding discharge port of the main discharge line, when the glass temperature sensing column 3-3 breaks, the valve core 3-2 moves towards the plug 3-4 under the action of hydrogen pressure, opening the passage between the valve seat 3-1 valve chamber and its opening, thereby opening the main discharge line. The main discharge line has a large inner diameter, enabling rapid discharge of a large flow rate.

[0042] The glass temperature sensing column 3-3 is located in the sealed space between the valve core 3-2 and the plug 3-4. Therefore, if the glass temperature sensing column 3-3 breaks, the resulting glass fragments will not enter the main exhaust gas path, thus avoiding any impact on the normal venting function. This design ensures the reliability of the device under extreme conditions.

[0043] The valve core 3-2 has a recessed cavity at one end corresponding to the discharge port. This design makes the valve core 3-2 more susceptible to the pressure of the hydrogen gas flow. After the discharge branch is opened, the hydrogen gas flow can enter the section of the main discharge gas path corresponding to the discharge port along the discharge branch, thereby applying pressure to the valve core 3-2. When this pressure exceeds the pressure limit of the glass temperature sensing column 3-3, the glass temperature sensing column 3-3 will also rupture, causing the main discharge gas path to open.

[0044] Both the valve seat 3-1 and valve body 1, and the valve core 3-2 and valve seat 3-1, employ a double-seal ring structure. This design effectively ensures the sealing effect and prevents leakage under normal conditions. The double-seal ring design not only improves sealing reliability but also compensates for minor displacements caused by temperature changes or mechanical vibrations to a certain extent, ensuring long-term stable operation.

[0045] Valve body 1, the main exhaust gas path, and the exhaust branch all adopt a right-angle bend structure. This design facilitates the installation of the burst valve assembly 2 and the glass temperature sensing valve assembly 3, and also makes the overall layout compact and small, adaptable to the installation requirements of confined spaces. Meanwhile, the glass temperature sensing valve assembly 3 is arranged perpendicularly to the end of the main exhaust gas path corresponding to the gas cylinder interface. This design effectively balances the pressure borne by the valve core 3-2, thereby improving the overall pressure resistance and preventing the glass temperature sensing column 3-3 from accidentally opening due to excessive pressure under normal conditions.

[0046] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to encompass all changes falling within the meaning and scope of equivalents within this invention.

Claims

1. A venting device for a large-diameter hydrogen tubular container, characterized in that it comprises: The valve body (1) has a right-angle structure. One corner of the valve body (1) is a gas cylinder interface, and the other corner is a discharge interface. A right-angle main discharge gas path is provided between the gas cylinder interface and the discharge interface, and a right-angle discharge branch is connected in parallel to the main discharge gas path. The burst valve assembly (2) is installed at the right-angle bend of the corresponding discharge branch of the valve body (1) to close the discharge branch and open it after the pressure exceeds the set value to discharge a small flow rate. The glass temperature sensing valve assembly (3) is installed on the right-angle bend of the valve body (1) and is used to close the main exhaust gas path. When the temperature exceeds the set value, it opens under the action of the airflow pressure in the exhaust branch to carry out large-flow discharge.

2. The venting device for a large-diameter hydrogen tubular container as described in claim 1, characterized in that, The burst valve assembly (2) includes: A rupture element (2-1) is installed on the discharge branch of the valve body (1) to block the discharge branch; Pressure ring (2-2) is used to position the explosive component (2-1). The center hole of the pressure ring (2-2) is coaxial with the discharge branch. Multiple secondary channels corresponding to and connected to the center hole are provided on the outer side of the pressure ring (2-2) along the circumferential direction. The valve body (1) is provided with an annular groove at the position corresponding to the secondary channel. The plug (2-3) is installed on the valve body (1) and is used to press the pressure ring (2-2) to seal the bursting element (2-1).

3. The venting device for a large-diameter hydrogen tubular container as described in claim 2, characterized in that: An annular copper pad (2-4) is provided between the rupture component (2-1) and the valve body (1).

4. The venting device for a large-diameter hydrogen tubular container as described in claim 3, characterized in that: The blasting component (2-1) adopts a positive arch structure.

5. The venting device for a large-diameter hydrogen tubular container as described in claim 1, characterized in that: The glass temperature sensing valve assembly (3) includes: The valve seat (3-1) is installed on the right-angle bend of the valve body (1), and the valve seat (3-1) has multiple openings spaced around its circumference. The valve core (3-2) is slidably inserted into the valve cavity of the valve seat (3-1) to cut off the passage between the valve cavity of the valve seat (3-1) and its opening, and the valve core (3-2) is perpendicular to a section of the gas cylinder interface corresponding to the main exhaust gas path. A glass temperature sensing column (3-3) is located inside the valve cavity of the valve seat (3-1) and is used to limit the position of the valve core (3-2); The plug (3-4) is threaded to the valve body (1) to press the valve seat (3-1) and position the glass temperature sensing column (3-3).

6. The venting device for a large-diameter hydrogen tubular container as described in claim 5, characterized in that: The valve core (3-2) has a recessed cavity at one end corresponding to the discharge port.

7. The venting device for a large-diameter hydrogen tubular container as described in claim 5, characterized in that: The valve seat (3-1) and valve body (1) are sealed with a double sealing ring structure, as are the valve core (3-2) and valve seat (3-1).

8. The venting device for a large-diameter hydrogen tubular container as described in any one of claims 1 to 7, characterized in that: The valve body (1) is equipped with a straight connector (4) at the discharge port end.

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