Pressure relief device and hydrogen storage equipment

Abstract

The present application relates to the technical field of hydrogen release, and discloses a release device and a hydrogen storage device. The release device includes: a release body, a flame suppression member, and a bursting member. A pressure relief passage is provided in the release body, and the release body further has a first opening and a second opening that are both communicated with the pressure relief passage. The flame suppression member is disposed in the pressure relief passage, and a flame suppression gas is stored in the flame suppression member. The bursting member is fixedly disposed in the pressure relief passage, and the bursting member is located between the first opening and the flame suppression member. The bursting member is used to block the pressure relief passage, and at least a part of the bursting member is configured to open when the pressure exerted by the hydrogen to be released on the bursting member is greater than a preset value. The opened part of the bursting member is adapted to pierce the flame suppression member so that the flame suppression gas flows out, and the flame suppression member is discharged through the second opening and the release pipeline in sequence under the action of the released hydrogen. Thus, the risk of spontaneous combustion during hydrogen release is effectively suppressed, which is beneficial to ensuring the safety of surrounding personnel and equipment.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen release, and particularly to a release device and a hydrogen storage device. Background Art

[0002] With the continuous development and utilization of hydrogen energy, high-pressure hydrogen storage technology has become the mainstream hydrogen storage method. Considering the overpressure risk that high-pressure hydrogen storage and transportation equipment may face during service and the dangerous characteristics of hydrogen itself, such as being flammable, explosive, and easy to leak, it is usually necessary to install a suitable overpressure release device to ensure that the high-pressure hydrogen in the overpressure container can be quickly discharged from a specified position.

[0003] In related technologies, a rupture disk safety device (rupture disk) is usually applied to hydrogen storage or transportation equipment such as hydrogen tube trailers as an overpressure release device with simple structure, low price, and good sealing performance. Among them, the release side of the rupture disk is connected to the release pipeline. When the rupture disk bursts and releases hydrogen, if the initial pressure of the hydrogen to be released exceeds a certain critical value, the released hydrogen is likely to spontaneously combust in the release pipeline downstream of the rupture disk, and when the flame spreads to the pipe orifice, it may develop into an external spray flame, thus seriously endangering the safety of surrounding personnel and equipment. Summary of the Invention

[0004] The present application provides a release device and a hydrogen storage device, which effectively suppress the risk of spontaneous combustion during hydrogen release and are beneficial to ensuring the safety of surrounding personnel and equipment.

[0005] To achieve the above object, the main technical solutions adopted in the present application include:

[0006] In a first aspect, an embodiment of the present application provides a release device, including:

[0007] A release body, in which a pressure relief channel is provided, and the release body also has a first opening and a second opening both communicating with the pressure relief channel. Among them, the first opening is used to communicate with the pressure relief outlet of the hydrogen storage device, and the second opening is used to communicate with the release pipeline of the hydrogen storage device;

[0008] An ignition suppression member, which is arranged in the pressure relief channel and stores ignition suppression gas therein;

[0009] A rupture disk, which is fixedly arranged in the pressure relief channel, is located between the first opening and the ignition suppression member, is used to block the pressure relief channel, and at least a part of the rupture disk is configured to open when the pressure exerted by the hydrogen to be released on the rupture disk is greater than a preset value. The opened part of the rupture disk is adapted to pierce the ignition suppression member to allow the ignition suppression gas to flow out, and the ignition suppression member is discharged through the second opening and the release pipeline in sequence under the action of the released hydrogen.

[0010] According to the pressure relief device proposed in the first aspect embodiment of the present application, when the pressure of the hydrogen to be relieved is too high, the blasting member is at least partially opened under the action of the pressure of the hydrogen to be relieved, and the opened part of the blasting member can pierce the flame suppression member, so that the flame suppression gas in the flame suppression member is quickly released and mixed into the relieved hydrogen. After the flame suppression member is pierced, the flame suppression member can pass through the second opening and the pressure relief pipeline in sequence under the action of the relieved hydrogen, which can not only ensure the normal high-pressure relief but also effectively suppress the spontaneous combustion of the hydrogen relief, which is beneficial to ensuring the safety of surrounding personnel and equipment.

[0011] Optionally, the pressure relief body includes a first connecting member, a second connecting member and a third connecting member. The first connecting member has a first pressure relief sub-channel and a first opening communicating with the first pressure relief sub-channel. The second connecting member has a second pressure relief sub-channel. The first connecting member is fixedly connected to the second connecting member, and the first pressure relief sub-channel is communicated with the second pressure relief sub-channel. The third connecting member has a third pressure relief sub-channel and a second opening communicating with the third pressure relief sub-channel. The second connecting member is fixedly connected to the third connecting member, and the second pressure relief sub-channel is communicated with the third pressure relief sub-channel;

[0012] The flame suppression member is arranged in the second pressure relief sub-channel, and the blasting member is fixedly arranged in the first pressure relief sub-channel and used to block the first pressure relief sub-channel.

[0013] Optionally, the first pressure relief sub-channel includes a first through hole and a second through hole connected in sequence. The first through hole communicates with the first opening. Among them, the inner diameter of the second through hole is larger than that of the first through hole to jointly form a first step surface;

[0014] The second pressure relief sub-channel includes a third through hole and a fourth through hole connected in sequence. The third through hole communicates with the second through hole, and the fourth through hole communicates with the third pressure relief sub-channel. Among them, the inner diameter of the third through hole is larger than that of the fourth through hole to jointly form a second step surface;

[0015] The blasting member is clamped between the first step surface and the second step surface, and at least part of the flame suppression member is arranged in the fourth through hole.

[0016] Optionally, the flame suppression member includes a smooth head and a main body part which are communicated. The main body part is arranged in the fourth through hole, and at least part of the smooth head is arranged in the third through hole, and the opened part of the blasting member is suitable for piercing the smooth head so that the flame suppression gas flows out.

[0017] Optionally, the flame suppression member further includes an outwardly convex bottom. The outwardly convex bottom is located on the side of the main body part away from the smooth head. One end of the fourth through hole close to the third connecting member has a first rounded portion, and the outwardly convex bottom has a second rounded portion matching the first rounded portion, and the outwardly convex bottom is arranged between the first rounded portion and the third connecting member.

[0018] Optionally, the flame suppression member is configured as a flame suppression airbag.

[0019] Optionally, the blasting member is configured as a cross-slot bursting disc.

[0020] Optionally, it further includes: a gasket and a pressure ring. The blasting member is clamped between the gasket and the pressure ring. The gasket abuts against the first stepped surface, and the pressure ring abuts against the second stepped surface.

[0021] Optionally, along the first direction, the flame suppression member is spaced apart from the blasting member.

[0022] In a second aspect, an embodiment of the present application provides a hydrogen storage device, including the pressure relief device in the embodiment of the first aspect.

[0023] For the hydrogen storage device proposed in the embodiment of the first aspect of the present application, when the pressure of the hydrogen to be discharged is too high, the blasting member is at least partially opened under the action of the pressure of the hydrogen to be discharged, and the opened part of the blasting member can pierce the flame suppression member, so that the flame suppression gas in the flame suppression member is quickly released and mixed into the discharged hydrogen. After the flame suppression member is pierced, the flame suppression member can sequentially pass through the second opening and the discharge pipeline under the action of the discharged hydrogen, which can not only ensure the normal high-pressure discharge, but also effectively suppress the spontaneous combustion of the discharged hydrogen, and is beneficial to ensuring the safety of surrounding personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the pressure relief device provided by an embodiment of the present application when not working;

[0026] Figure 2 A partial enlarged view of the pressure relief device provided by an embodiment of the present application when not working;

[0027] Figure 3 Schematic diagram of the second connecting member provided by an embodiment of the present application;

[0028] Figure 4 Schematic diagram of the flame suppression member provided by an embodiment of the present application;

[0029] Figure 5 Another partial enlarged view of the pressure relief device provided by an embodiment of the present application when not working;

[0030] Figure 6 Schematic diagram of the blasting member provided by an embodiment of the present application when not opened;

[0031] Figure 7 Schematic diagram of the working of the relief device provided by an embodiment of the present application;

[0032] Figure 8 Partial enlarged view of the working of the relief device provided by an embodiment of the present application;

[0033] Figure 9 Schematic diagram of the discharge of the flame suppression member during the working of the relief device provided by an embodiment of the present application.

[0034]

Description of the reference numerals

[0035] Relief device 100;

[0036] Relief body 1; pressure relief channel 11; first opening 12; second opening 13; first connecting member 14; first pressure relief sub-channel 141; first through hole 1411; second through hole 1412; first stepped surface 1413; second connecting member 15; second pressure relief sub-channel 151; third through hole 1511; fourth through hole 1512; first rounded portion 15121; second stepped surface 1513; third connecting member 16; third pressure relief sub-channel 161;

[0037] Flame suppression member 2; smooth head 21; break 211; main body portion 22; outwardly convex bottom 23; second rounded portion 231;

[0038] Blasting member 3; blasting member body 31; piercing portion 32;

[0039] Gasket 4;

[0040] Pressing ring 5;

[0041] Flame suppression gas 6;

[0042] First direction X. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application pertains; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification, claims, or drawings of this application are used to distinguish different objects and not to describe a specific order or primary-secondary relationship.

[0045] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] In the description of this application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "attached" shall be construed broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] The term "and / or" in this application is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0048] The term "plurality" as used in this application means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0049] Economically secure hydrogen storage and transportation technologies are a prerequisite for the large-scale development of the hydrogen energy industry, and high-pressure hydrogen storage technology has become the current mainstream hydrogen storage method due to its advantages such as fast charging and discharging speed, simple equipment structure, and low energy consumption for compressed hydrogen production.

[0050] Considering the overpressure risk that high-pressure hydrogen storage and transportation equipment may face during service, as well as the dangerous characteristics of hydrogen itself, such as being flammable, explosive, and prone to leakage, it is usually necessary to install a suitable overpressure relief device to ensure that the high-pressure hydrogen in the overpressure vessel can be quickly discharged from a specified location. The rupture disk safety device is an overpressure relief device with a simple structure, low price, and good sealing performance, and is usually applied to equipment such as hydrogen tube trailers. Standards and regulations such as China's TSG ZF003-2011 "Safety Technical Supervision Regulations for Rupture Disk Devices" require that a discharge nozzle should be provided on the discharge side of the rupture disk device of pressure-bearing equipment containing flammable and explosive media, and the medium should be discharged to a safe location.

[0051] According to the diffusion ignition theory, a shock wave may form in front of the high-pressure hydrogen suddenly discharged through the rupture disk. When the initial pressure of the discharged hydrogen exceeds a certain critical value, the air in the discharge pipeline heated by the shock wave quickly mixes with the hydrogen jet. When the mixture reaches the ignition temperature and flammable concentration, after a certain ignition delay, spontaneous combustion can occur in the discharge pipeline without any ignition source. If the flame spreads to the pipe orifice, it may develop into an external jet fire, seriously endangering the safety of surrounding personnel and equipment. Therefore, there is an urgent need for a spontaneous combustion suppression device that can be used in conjunction with rupture disks and other blasting components for hydrogen.

[0052] In related technologies, the startup of the high-pressure hydrogen discharge spontaneous combustion suppression device in the pipeline mostly relies on numerical control technology. The discharge signal is collected by sensors to control the opening and closing of the combustion suppression device, and it is necessary to keep the monitoring system online and the sensors sensitive for a long time. The spontaneous combustion suppression devices in some laboratory scenarios must use discharge pipelines with complex structures. However, the complex pipeline shape may promote the occurrence of spontaneous combustion.

[0053] Based on this, the present application proposes a discharge device 100. When the pressure of the hydrogen to be discharged is too high, the blasting component 3 is at least partially opened under the action of the pressure of the hydrogen to be discharged, and the opened part of the blasting component 3 can pierce the combustion suppression component 2, so that the combustion suppression gas 6 in the combustion suppression component 2 is quickly released and mixed into the discharged hydrogen. After the combustion suppression component 2 is pierced, the combustion suppression component 2 can be discharged through the second opening 13 and the discharge pipeline in sequence under the action of the discharged hydrogen. While ensuring the normal high-pressure discharge, it can also effectively suppress the spontaneous combustion of hydrogen discharge, which is beneficial to ensuring the safety of surrounding personnel and equipment. At the same time, the entire process of suppressing the spontaneous combustion of hydrogen during discharge does not rely on a complex monitoring system and sensors, and can be achieved only by the action characteristics of the blasting component 3 itself. The action is accurate and rapid, economical and convenient, and has a simple structure and high reliability.

[0054] The following describes the discharge device 100 and the hydrogen storage equipment proposed in the embodiments of the present application with reference to the accompanying drawings.

[0055] As Figures 1 - 9As shown in the figure, the pressure relief device 100 according to the embodiment of the first aspect of the present application includes: a pressure relief body 1, a flame suppression member 2, and a blasting member 3.

[0056] Wherein, a pressure relief channel 11 is provided in the pressure relief body 1, and the pressure relief body 1 further has a first opening 12 and a second opening 13 both communicating with the pressure relief channel 11. Among them, the first opening 12 is used to communicate with the pressure relief outlet of the hydrogen storage device, and the second opening 13 is used to communicate with the pressure relief pipeline of the hydrogen storage device. The flame suppression member 2 is arranged in the pressure relief channel 11, and a flame suppression gas 6 is stored in the flame suppression member 2. The blasting member 3 is fixedly arranged in the pressure relief channel 11, and the blasting member 3 is located between the first opening 12 and the flame suppression member 2. The blasting member 3 is used to block the pressure relief channel 11. At least part of the blasting member 3 is configured to open when the pressure exerted on the blasting member 3 by the hydrogen to be relieved is greater than a preset value. The opened part of the blasting member 3 is adapted to pierce the flame suppression member 2 so that the flame suppression gas 6 flows out, and the flame suppression member 2 is discharged through the second opening 13 and the pressure relief pipeline in sequence under the action of the relieved hydrogen.

[0057] Specifically, the pressure relief body 1 is the main structure of the pressure relief device 100, and a pressure relief channel 11 for hydrogen relief is provided inside it. Further, the pressure relief body 1 also has a first opening 12 and a second opening 13 both communicating with the pressure relief channel 11. Among them, the first opening 12 is used as the port communicating with the pressure relief outlet of the hydrogen storage device. For example, the first opening 12 can be set as an internal thread structure, and the pressure relief outlet of the hydrogen storage device is threadedly connected to the first opening 12 to improve the connection performance and sealing performance between the first opening 12 and the pressure relief outlet of the hydrogen storage device. Similarly, the second opening 13 is used as the port communicating with the pressure relief pipeline of the hydrogen storage device, and it can also be set as an internal thread structure to adapt to the interface type of the pressure relief pipeline of the hydrogen storage device, which will not be elaborated here.

[0058] Before the blasting member 3 is fixedly installed in the pressure relief channel 11, since both the first opening 12 and the second opening 13 communicate with the pressure relief channel 11, the first opening 12 and the second opening 13 of the pressure relief body 1 communicate through the pressure relief channel 11. And when the blasting member 3 is fixedly installed in the pressure relief channel 11, since the blasting member 3 can block the pressure relief channel 11, the first opening 12 and the second opening 13 of the pressure relief body 1 are separated by the blasting member 3.

[0059] It should be noted that research shows that the flame suppression gas 6 (such as carbon dioxide) has a high specific heat capacity, so it can reduce the temperature of the hydrogen-oxygen reactants. In addition, carbon dioxide can dilute the concentration of the hydrogen-oxygen reactants and compete with oxygen for hydrogen radicals, which is conducive to reducing the hydrogen-oxygen combustion reaction rate.

[0060] Based on this, in order to suppress the risk of spontaneous combustion during hydrogen release, the present application is provided with a combustion suppressant 2 in the pressure relief passage 11. The combustion suppressant 2 stores a combustion suppressant gas 6 in advance, and the combustion suppressant 2 is arranged between the bursting member 3 and the second opening 13. At least a part of the bursting member 3 is configured to open when the pressure of the hydrogen to be released applied on the bursting member 3 is greater than a preset value, and the opened part of the bursting member 3 can pierce the combustion suppressant 2 so that the combustion suppressant gas 6 in the combustion suppressant 2 flows out. For example, the bursting member 3 can be configured as a specific metal sheet material. Before it bursts and opens, the bursting member 3 can be used to block the pressure relief passage 11. Through specific thickness and structure design, when the pressure of the hydrogen to be released applied on the bursting member 3 is greater than the preset value required for the part of the bursting member 3 that can open, the part of the bursting member 3 that can open opens under the pressure of the hydrogen to be released, and the structure of the bursting member 3 that bursts and opens can pierce the combustion suppressant 2, so that the combustion suppressant gas 6 flows out of the combustion suppressant 2 and is quickly released, enabling the combustion suppressant gas 6 to mix with the released hydrogen. After the combustion suppressant 2 is pierced, the combustion suppressant 2 can sequentially pass through the second opening 13 and the discharge pipe under the action of the released hydrogen. That is to say, the combustion suppressant 2 is not fixed in the pressure relief passage 11 in the pierced state, or it can be understood that the combustion suppressant 2 is fixedly installed in the pressure relief passage 11 before being pierced, and when the combustion suppressant 2 is pierced, it is no longer fixedly connected to the pressure relief passage 11, thus ensuring the normal high-pressure release, meeting the release requirements of high-pressure hydrogen. At the same time, when the combustion suppressant gas 6 mixes with the released hydrogen, the combustion suppressant gas 6 increases the critical value of the initial pressure of the released hydrogen when spontaneous combustion occurs, delays the occurrence time of spontaneous combustion, reduces the average flame speed and flame intensity, and reduces the duration of the spontaneous combustion flame, etc., thereby effectively suppressing the risk of spontaneous combustion during hydrogen release and being beneficial to ensuring the safety of surrounding personnel and equipment.

[0061] Furthermore, the entire process of suppressing hydrogen spontaneous combustion during release does not need to rely on a complex monitoring system and sensors, and can be achieved only by relying on the action characteristics of the bursting member 3 itself. The action is precise and rapid, economical and convenient, and there is no need to design a relatively complex release structure. The pressure relief passage 11 in the release body 1 has a relatively simple structure and will not promote the occurrence of spontaneous combustion, ensuring the reliability of the release device 100.

[0062] The pressure relief device 100 according to the embodiment of the first aspect of the present application, when the pressure of the hydrogen to be relieved is too high, the bursting member 3 is at least partially opened under the action of the pressure of the hydrogen to be relieved, and the opened part of the bursting member 3 can puncture the flame suppression member 2, so that the flame suppression gas 6 in the flame suppression member 2 is quickly released and mixed into the relieved hydrogen. After the flame suppression member 2 is punctured, the flame suppression member 2 can sequentially pass through the second opening 13 and the relief pipeline under the action of the relieved hydrogen, which can not only ensure the normal high-pressure relief, but also effectively suppress the spontaneous combustion of the relieved hydrogen, which is beneficial to ensuring the safety of surrounding personnel and equipment. At the same time, the entire process of suppressing the spontaneous combustion of hydrogen during relief does not rely on a complex monitoring system and sensors, and can be realized only by relying on the action characteristics of the bursting member 3 itself. The action is accurate and rapid, economical and convenient, and the structure is simple and the reliability is high.

[0063] In some embodiments of the present application, as Figure 1 shown, the relief body 1 includes a first connecting member 14, a second connecting member 15 and a third connecting member 16. The first connecting member 14 has a first pressure relief sub-channel 141 and a first opening 12 communicating with the first pressure relief sub-channel 141. The second connecting member 15 has a second pressure relief sub-channel 151. The first connecting member 14 is fixedly connected to the second connecting member 15, and the first pressure relief sub-channel 141 is communicated with the second pressure relief sub-channel 151. The third connecting member 16 has a third pressure relief sub-channel 161 and a second opening 13 communicating with the third pressure relief sub-channel 161. The second connecting member 15 is fixedly connected to the third connecting member 16, and the second pressure relief sub-channel 151 is communicated with the third pressure relief sub-channel 161. The flame suppression member 2 is disposed in the second pressure relief sub-channel 151, and the bursting member 3 is fixedly disposed in the first pressure relief sub-channel 141 and is used to block the first pressure relief sub-channel 141.

[0064] Specifically, the relief body 1 is composed of a first connecting member 14, a second connecting member 15 and a third connecting member 16 connected in sequence. The connection method includes but is not limited to threaded connection, etc. For example, as Figure 1 shown, internal threads are provided at both the left and right ends of the second connecting member 15, an external thread is provided at the right end of the first connecting member 14, and an external thread is provided at the left end of the third connecting member 16. Among them, the internal thread at the left end of the second connecting member 15 is connected to the external thread at the right end of the first connecting member 14, and the internal thread at the right end of the second connecting member 15 is connected to the external thread at the left end of the third connecting member 16.

[0065] Optionally, the outer shapes of the first connecting member 14, the second connecting member 15, and the third connecting member 16 can be configured as hexagonal prisms that are convenient for clamping. Further, the first connecting member 14 has a first pressure relief sub-channel 141, the second connecting member 15 has a second pressure relief sub-channel 151, and the third connecting member 16 has a third pressure relief sub-channel 161. Before the blasting member 3 is fixedly installed in the first pressure relief sub-channel 141, when the first connecting member 14, the second connecting member 15, and the third connecting member 16 are connected in sequence, the first pressure relief sub-channel 141, the second pressure relief sub-channel 151, and the third pressure relief sub-channel 161 are sequentially communicated. That is to say, the first pressure relief sub-channel 141, the second pressure relief sub-channel 151, and the third pressure relief sub-channel 161 together form the pressure relief channel 11 of the above-mentioned pressure relief body 1.

[0066] Further, the first connecting member 14 has a first opening 12, and the third connecting member 16 has a second opening 13. That is to say, the first connecting member 14 is communicated with the pressure relief outlet of the hydrogen storage device through the first opening 12, and the third connecting member 16 is communicated with the pressure relief pipeline of the hydrogen storage device through the second opening 13. For example, the first opening 12 can be set as an internal thread structure, and the pressure relief outlet of the hydrogen storage device is threadedly connected to the first opening 12. Similarly, the second opening 13 can also be set as an internal thread structure to adapt to the interface type of the pressure relief pipeline of the hydrogen storage device. Moreover, both the first opening 12 and the pressure relief outlet of the hydrogen storage device and the second opening 13 and the pressure relief pipeline of the hydrogen storage device can be sealed by means of conical surface sealing. In this way, it can further prevent hydrogen from leaking under normal circumstances.

[0067] When the blasting member 3 is fixedly installed in the first pressure relief sub-channel 141, the installation method includes but is not limited to clamping. Since the blasting member 3 blocks the first pressure relief sub-channel 141, the first opening 12 and the second opening 13 of the pressure relief body 1 are blocked by the blasting member 3. It can be understood that when the pressure of the hydrogen to be released applied to the blasting member 3 is greater than the preset value required for the part of the blasting member 3 that can be opened, the part of the blasting member 3 that can be opened opens under the pressure of the hydrogen to be released. It should be noted that although the blasting member 3 and the flame suppression member 2 are arranged in different connecting members, the distance between them is not far, ensuring that the structure where the blasting member 3 breaks and opens can pierce the flame suppression member 2, so that the flame suppression gas 6 flows out of the flame suppression member 2 and is quickly released and mixed into the released hydrogen, thereby suppressing the spontaneous combustion of the released hydrogen.

[0068] At the same time, the pressure relief body 1 is divided into detachable first connecting member 14, second connecting member 15, and third connecting member 16. The first connecting member 14, the second connecting member 15, and the third connecting member 16 are threadedly connected to each other, which is not only convenient for disassembling, repairing, and replacing the flame suppression member 2, but also does not affect the normal operation of the upstream hydrogen storage device when disassembling and assembling the structure downstream of the blasting member 3.

[0069] In some embodiments of the present application, Figure 2 and Figure 3 As shown, the first pressure relief sub-channel 141 includes a first through hole 1411 and a second through hole 1412 connected in sequence, the first through hole 1411 is connected to the first opening 12, wherein the inner diameter of the second through hole 1412 is larger than the inner diameter of the first through hole 1411 to jointly form a first step surface 1413, the second pressure relief sub-channel 151 includes a third through hole 1511 and a fourth through hole 1512 connected in sequence, the third through hole 1511 is connected to the second through hole 1412, and the fourth through hole 1512 is connected to the third pressure relief sub-channel 161, wherein the inner diameter of the third through hole 1511 is larger than the inner diameter of the fourth through hole 1512 to jointly form a second step surface 1513, the blasting component 3 is sandwiched between the first step surface 1413 and the second step surface 1513, and at least a portion of the flame retardant component 2 is arranged in the fourth through hole 1512.

[0070] Specifically, before the bursting component 3 is fixedly installed in the second through hole 1412, when the first connecting member 14, the second connecting member 15, and the third connecting member 16 are connected in sequence, the first opening 12, the first through hole 1411, the second through hole 1412, the third through hole 1511, the fourth through hole 1512, the third pressure relief sub-channel 161, and the second opening 13 are connected in sequence, that is, the first through hole 1411, the second through hole 1412, the third through hole 1511, the fourth through hole 1512, and the third pressure relief sub-channel 161 jointly form the pressure relief channel 11 of the above-mentioned relief body 1.

[0071] Furthermore, since the inner diameter of the second through hole 1412 is greater than the inner diameter of the first through hole 1411, a first step surface 1413 can be formed at the connection between the first through hole 1411 and the second through hole 1412, and since the inner diameter of the third through hole 1511 is greater than the inner diameter of the fourth through hole 1512, a second step surface 1513 can be formed at the connection between the third through hole 1511 and the fourth through hole 1512. When the blasting component 3 is fixedly installed, the blasting component 3 is sandwiched between the first step surface 1413 and the second step surface 1513. At the same time, the explosive component 3 is located in the second through hole 1412, and at least a part of the flame retardant 2 is arranged in the fourth through hole 1512. It can be understood that when the pressure of the hydrogen to be discharged applied to the explosive component 3 is greater than the preset value required for the part that the explosive component 3 can open, the part that the explosive component 3 can open opens under the pressure of the hydrogen to be discharged, and the structure of the explosive component 3 that is broken and opened can pierce the flame retardant 2, so that the flame retardant gas 6 flows out of the flame retardant 2 and is quickly released and mixed into the discharged hydrogen, thereby suppressing the spontaneous combustion of the hydrogen discharge.

[0072] In some embodiments of the present application, Figure 4 , Figure 7 and Figure 8As shown, the flame suppression member 2 includes a smooth head 21 and a main body 22 that are connected. The main body 22 is disposed in the fourth through hole 1512, and at least a part of the smooth head 21 is disposed in the third through hole 1511. The opened part of the blasting member 3 is adapted to pierce the smooth head 21 so that the flame suppression gas 6 flows out.

[0073] Specifically, as Figure 4 shown, the flame suppression member 2 includes a smooth head 21 and a main body 22. It can be understood that the inside of the smooth head 21 and the main body 22 is interconnected and filled with the flame suppression gas 6. The main body 22 of the flame suppression member 2 is disposed in the fourth through hole 1512, and at least a part of the smooth head 21 is disposed in the third through hole 1511. For example, a part of the smooth head 21 can be located in the third through hole 1511 and a part in the fourth through hole 1512, or it can be completely located in the third through hole 1511. When the opened part that the blasting member 3 can open is opened under the pressure of the hydrogen to be discharged, as Figure 7 and Figure 8 shown, the structure where the blasting member 3 ruptures and opens can pierce the smooth head 21 of the flame suppression member 2, so that the flame suppression gas 6 flows out from the break 211 of the smooth head 21 and is quickly released and mixed into the discharged hydrogen, and the piercing method is more convenient.

[0074] In some embodiments of the present application, as Figure 4 and Figure 5 shown, the flame suppression member 2 further includes an outwardly convex bottom 23. The outwardly convex bottom 23 is located on the side of the main body 22 away from the smooth head 21. One end of the fourth through hole 1512 close to the third connecting member 16 has a first rounded portion 15121. The outwardly convex bottom 23 has a second rounded portion 231 that matches the first rounded portion 15121, and the outwardly convex bottom 23 is disposed between the first rounded portion 15121 and the third connecting member 16.

[0075] Specifically, as Figure 4 shown, the outwardly convex bottom 23 of the flame suppression member 2 is located on the side of the main body 22 away from the smooth head 21. The peripheral part of the outwardly convex bottom 23 is a flange, and an air injection port is provided at the right end of the outwardly convex bottom 23. It can be understood that the flame suppression member 2 can be placed in the pressure relief channel 11 and then the flame suppression gas 6 is injected, or the flame suppression gas 6 can be injected into the air injection port of the flame suppression member 2 and then placed in the pressure relief channel 11. Further, one end of the fourth through hole 1512 close to the third connecting member 16 has a first rounded portion 15121. The outwardly convex bottom 23 has a second rounded portion 231 that matches the first rounded portion 15121. The first rounded portion 15121 is used to assist in the assembly of the flame suppression member 2, and the first rounded portion 15121 is designed as an arc so as not to scratch the flame suppression member 2.

[0076] Furthermore, as Figure 5As shown, there is a gap between the first chamfered portion 15121 and the left end face of the third connecting member 16, and the convex bottom 23 can be partially arranged in the gap formed by the first chamfered portion 15121 and the third connecting member 16. In this way, the first chamfered portion 15121 and the third connecting member 16 play a certain auxiliary role in limiting the position of the flame suppressant 2. At the same time, when the part of the explosion member 3 that can be opened is opened under the impact of the hydrogen to be released, a small amount of hydrogen to be released is first released from the rupture position. These released hydrogen first push the flame suppressant 2 to move slightly toward the third connecting member 16 until the convex bottom 23 of the flame suppressant 2 is supported by the left end face of the third connecting member 16. This process is very fast. It should be noted that before the rupture opening structure of the explosion member 3 pierces the smooth head 21 of the flame suppressant 2, the flame suppressant 2 can be limited within the moving range to avoid the flame suppressant 2 moving too far, which causes the explosion member 3 to fail to pierce the flame suppressant 2, thereby causing the hydrogen spontaneous combustion suppression to fail.

[0077] In some embodiments of the present application, the flame suppression element 2 is configured as a flame suppression bag.

[0078] Specifically, if Figure 4 As shown, the flame suppression bag is divided into three parts, namely, a smooth head 21, a main body 22 and a convex bottom 23. The outer peripheral part of the convex bottom 23 is a flange, and a gas injection port is arranged on the right side of the convex bottom 23. Carbon dioxide or other flame suppression gas 6 with the effect of suppressing spontaneous combustion is injected into the flame suppression bag. The flame suppression bag is made of a material that is elastic, stable, easy to be scratched by sharp objects and fireproof, such as Figure 1 As shown, the outer wall of the main body 22 of the flame suppressant bag filled with the flame suppressant gas 6 can abut against the inner wall of the fourth through hole 1512, so that the position of the flame suppressant bag is fixed in the fourth through hole 1512 before puncture and the fourth through hole 1512 can be blocked to a certain extent.

[0079] Furthermore, if Figure 5 As shown, the second rounded portion 231 of the convex bottom portion 23 of the flame suppressant bag matches the curvature of the first rounded portion 15121 of the fourth through hole 1512, and the flange of the convex bottom portion 23 is placed in the gap formed between the first rounded portion 15121 and the left end surface of the third connecting member 16 before the bursting member 3 is opened, thereby playing a certain auxiliary role in limiting the position of the flame suppressant bag.

[0080] Furthermore, after the flame suppression bag is punctured, the volume of the flame suppression bag decreases rapidly as the flame suppression gas 6 in the flame suppression bag flows out. Figure 9As shown, the flame suppression airbag moves rapidly towards the discharge pipeline under the impact of the high-speed jet of hydrogen released and the reaction force of the leaked flame suppression gas 6, and finally discharges from the discharge pipeline. In this way, the movement of the flame suppression airbag helps the further dispersion of the flame suppression gas 6 in the discharge pipeline and the mixing with hydrogen, thereby further improving the suppression effect on the spontaneous combustion of high-pressure hydrogen discharge.

[0081] In some embodiments of the present application, as Figures 6 - 9 shown, the blasting member 3 is configured as a cross-grooved bursting disc.

[0082] Specifically, as Figure 6 shown, the blasting member 3 has a cross-shaped groove before opening. As Figure 8 shown, when the blasting member 3 opens, the cross-shaped groove breaks to form a blasting member body 31 and four puncture parts 32. The four puncture parts 32 after opening rotate around the sides connected to the blasting member body 31 respectively to form four triangular membrane flaps with sharp corners. It can be understood that the smooth head 21 of the flame suppression member 2 is within the path range of the rotation of the sharp corners of the triangular membrane flaps during the unfolding process of the blasting member 3. In this way, the four triangular membrane flaps can pierce the smooth head 21 of the flame suppression member 2, so that the flame suppression gas 6 flows out from the break 211 of the smooth head 21 and is quickly released and mixed into the discharged hydrogen, effectively suppressing the spontaneous combustion of hydrogen discharge.

[0083] In some embodiments of the present application, as Figure 2 and Figure 8 shown, it further includes: a gasket 4 and a retaining ring 5. The blasting member 3 is clamped between the gasket 4 and the retaining ring 5. The gasket 4 abuts against the first step surface 1413, and the retaining ring 5 abuts against the second step surface 1513. That is to say, between the first step surface 1413 of the first connecting member 14 and the second step surface 1513 of the second connecting member 15, there are successively clamped the gasket 4, the blasting member 3 and the retaining ring 5 from left to right. Among them, the retaining ring 5 has an avoidance through hole. When the puncture part 32 of the blasting member 3 opens, the puncture part 32 extends into the avoidance through hole and fits with the inner wall of the avoidance through hole. On the one hand, this ensures that the puncture part 32 can pierce the flame suppression member 2, and on the other hand, it can also make the blasting member 3 form a discharge port of a suitable size.

[0084] In some embodiments of the present application, as Figure 1 , Figure 2 and Figure 8As shown in the figure, along the first direction X, the flame suppression member 2 is spaced apart from the blasting member 3. Among them, the first direction X is the extending direction of the pressure relief channel 11. By spacing the flame suppression member 2 and the blasting member 3 along the first direction X, it can be ensured that the blasting member 3 does not come into direct contact with the flame suppression member 2 before blasting, preventing the flame suppression member 2 from being too close to the blasting member 3, which may cause the flame suppression member 2 to resist the blasting member 3 over a large area, affecting the opening of the blasting member 3 at the predetermined blasting pressure value. When the flame suppression member 2 is configured as a flame suppression airbag, it also prevents the elastic material of the flame suppression airbag from being worn and aged due to contact with the blasting member 3, ensuring the reliability of the pressure relief device 100.

[0085] To enable those skilled in the art to better understand this solution, the installation and use process of the pressure relief device 100 will be introduced in detail below:

[0086] Specifically, as shown in Figure 2 the figure, the gasket 4, the blasting member 3, and the pressure ring 5 are respectively installed between the first step surface 1413 of the first connector 14 and the second step surface 1513 of the second connector 15, and then the external thread at the right end of the first connector 14 is screwed tightly with the internal thread at the left end of the second connector 15.

[0087] As shown in Figures 1 - 5 the figure, the flame suppression airbag without injecting the flame suppression gas 6 is inserted into the fourth through hole 1512 from the right end of the second connector 15, and the flame suppression gas 6 is injected into the flame suppression airbag through the gas injection port at the right end of the flame suppression airbag. During the gas injection process, the position of the flame suppression airbag is adjusted in a timely manner so that the outer wall of the main body portion 22 of the flame suppression airbag can resist the inner wall of the fourth through hole 1512 in the second connector 15, and at least a part of the smooth head 21 of the flame suppression airbag extends into the third through hole 1511. Among them, the smooth head 21 of the flame suppression airbag has a certain distance from the blasting member 3 in the first direction X, but the distance between the two is not far, ensuring that the triangular membrane flap during the unfolding process of the blasting member 3 can pierce the smooth head 21 of the flame suppression airbag. After the gas injection is completed, the second connector 15 and the third connector 16 are connected by thread fitting. At the same time, as shown in Figure 5 the figure, ensure that the convex bottom 23 of the flame suppression airbag is located in the gap formed by the first rounded portion 15121 of the second connector 15 and the left end face of the third connector 16, and the convex bottom 23 of the flame suppression airbag does not come into direct contact with the left end face of the third connector 16. It should be noted that a sealing ring can be provided between the connection surfaces of the second connector 15 and the third connector 16 to improve the sealing performance.

[0088] After the pressure relief device 100 is installed, the first opening 12 of the pressure relief device 100 is communicated with the pressure relief outlet of the hydrogen storage device, and the second opening 13 of the pressure relief device 100 is communicated with the pressure relief pipeline of the hydrogen storage device.

[0089] As shown in Figures 6 - 8As shown, the present application continues to explain by taking the blasting piece 3 being constructed as a cross-groove blasting piece as an example. When the blasting piece 3 is opened, the cross-shaped groove breaks to form the blasting piece body 31 and four puncture portions 32. In the initial stage of opening the blasting piece 3, the released hydrogen first pushes the flame retardant bag to move slightly toward the third connecting piece 16 until the outer convex bottom 23 of the flame retardant bag is supported by the left end face of the third connecting piece 16. This process is very rapid. As the puncture portions 32 of the blasting piece 3 continue to rotate around their respective edges connected to the blasting piece body 31, four triangular membrane petals with sharp corners are formed. As mentioned above, the smooth head 21 of the flame retardant bag is within the path range of the rotation of the sharp corners of the triangular membrane petals during the deployment of the blasting piece 3. The four triangular membrane petals can pierce the smooth head 21 of the flame retardant bag, so that the flame retardant gas 6 flows out from the rupture 211 of the smooth head 21 and is quickly released and mixed into the released hydrogen. After the flame retardant bag is opened and pierced by the blasting piece 3, as the flame retardant gas 6 in the flame retardant bag flows out, the volume of the flame retardant bag decreases rapidly. The flame retardant bag moves rapidly toward the discharge pipe under the impact of the high-speed jet of the released hydrogen and the reaction force of the leaked flame retardant gas 6, and is finally discharged from the discharge pipe. The flame retardant gas 6 mixed with hydrogen continues to diffuse in the discharge pipe, thereby suppressing the spontaneous combustion of hydrogen. The puncture portion 32 also fits with the inner wall of the avoidance hole of the pressure ring 5 to form a discharge port of appropriate size.

[0090] Furthermore, if Figure 9 As shown, the flame retardant bag also moves rapidly toward the discharge pipe under the impact of the high-speed jet of released hydrogen and the reaction force of the leaked flame retardant gas 6, and is finally discharged from the discharge pipe. In this way, the movement of the flame retardant bag also helps to further disperse the flame retardant gas 6 in the discharge pipe and mix it with hydrogen, thereby further improving the effect of suppressing the spontaneous combustion of high-pressure hydrogen discharge.

[0091] In a second aspect, an embodiment of the present application provides a hydrogen storage device, including the discharge device 100 in the embodiment of the first aspect.

[0092] According to the hydrogen storage device proposed in the first aspect of the embodiment of the present application, when the pressure of the hydrogen to be released is too high, the blasting component 3 is at least partially opened under the pressure of the hydrogen to be released, and the opened part of the blasting component 3 can pierce the flame retardant 2, so that the flame retardant gas 6 in the flame retardant 2 is quickly released and mixed into the released hydrogen. After the flame retardant 2 is pierced, the flame retardant 2 can be discharged through the second opening 13 and the discharge pipe in sequence under the action of the released hydrogen. While ensuring the normal high-pressure discharge, it can also effectively suppress the spontaneous combustion of hydrogen discharge, which is beneficial to ensuring the safety of surrounding personnel and equipment. At the same time, the entire release process of suppressing the spontaneous combustion of hydrogen does not need to rely on complex monitoring systems and sensors, but can be achieved only by relying on the action characteristics of the blasting component 3 itself. The action is accurate and rapid, economical and convenient, and the structure is simple and the reliability is high.

[0093] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising said element.

[0094] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference can be made to the relevant part of the method embodiment for the related content.

[0095] The above description is only for the embodiments of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

[0096] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A discharge device, characterized in that: include: A discharge body, wherein a pressure relief passage is provided in the discharge body, and the discharge body further comprises a first opening and a second opening both communicating with the pressure relief passage, wherein the first opening is used to communicate with the pressure relief outlet of the hydrogen storage device, and the second opening is used to communicate with the discharge pipe of the hydrogen storage device; A flame suppression component, wherein the flame suppression component is arranged in the pressure relief passage and contains flame suppression gas; A bursting component, wherein the bursting component is fixedly arranged in the pressure relief passage, the bursting component is located between the first opening and the flame retardant component, the bursting component is used to block the pressure relief passage, and at least a portion of the bursting component is constructed to open when the pressure exerted on the bursting component by the hydrogen to be released is greater than a preset value, the opened portion of the bursting component is suitable for puncturing the flame retardant component to allow the flame retardant gas to flow out, and the flame retardant component is discharged in sequence through the second opening and the discharge pipe under the action of the released hydrogen.

2. The discharge device according to claim 1, characterized in that: The discharge body comprises a first connection member, a second connection member and a third connection member, the first connection member has a first pressure relief sub-channel and the first opening communicating with the first pressure relief sub-channel, the second connection member has a second pressure relief sub-channel, the first connection member is fixedly connected to the second connection member, and the first pressure relief sub-channel is communicated with the second pressure relief sub-channel, the third connection member has a third pressure relief sub-channel and the second opening communicating with the third pressure relief sub-channel, the second connection member is fixedly connected to the third connection member, and the second pressure relief sub-channel is communicated with the third pressure relief sub-channel; The flame suppression component is arranged in the second pressure relief sub-channel, and the explosion component is fixedly arranged in the first pressure relief sub-channel and is used to block the first pressure relief sub-channel.

3. The discharge device according to claim 2, characterized in that: The first pressure relief sub-channel comprises a first through hole and a second through hole which are connected in sequence, the first through hole is connected to the first opening, wherein the inner diameter of the second through hole is larger than the inner diameter of the first through hole to form a first step surface together; The second pressure relief sub-channel comprises a third through hole and a fourth through hole which are connected in sequence, the third through hole is connected to the second through hole, and the fourth through hole is connected to the third pressure relief sub-channel, wherein the inner diameter of the third through hole is greater than the inner diameter of the fourth through hole to form a second step surface together; The explosion component is sandwiched between the first step surface and the second step surface, and at least a portion of the flame suppression component is disposed in the fourth through hole.

4. The discharge device according to claim 3, characterized in that: The flame suppressant comprises a connected smooth head and a main body, the main body is arranged in the fourth through hole, at least part of the smooth head is arranged in the third through hole, and the opened part of the explosion part is suitable for piercing the smooth head to allow the flame suppressant gas to flow out.

5. The discharge device according to claim 4, characterized in that: The flame retardant also includes an outwardly convex bottom portion, which is located on a side of the main body away from the smooth head portion, and the fourth through hole has a first rounded portion at one end close to the third connecting piece, and the outwardly convex bottom portion has a second rounded portion matching the first rounded portion, and the outwardly convex bottom portion is arranged between the first rounded portion and the third connecting piece.

6. The discharge device according to any one of claims 1 to 5, characterized in that: The flame suppression member is configured as a flame suppression bag.

7. The discharge device according to any one of claims 1 to 5, characterized in that: The bursting piece is constructed as a cross-groove bursting disc.

8. The discharge device according to claim 3, characterized in that: Also includes: A gasket and a pressure ring, the bursting piece is sandwiched between the gasket and the pressure ring, the gasket abuts against the first step surface, and the pressure ring abuts against the second step surface.

9. The discharge device according to any one of claims 1 to 5, characterized in that: Along the first direction, the flame suppression component is spaced apart from the explosion component.

10. A hydrogen storage device, characterized in that: Comprising a discharge device according to any one of claims 1-9.

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