Gas cylinder release assembly, cylinder valve and gas cylinder

Abstract

The utility model provides a gas cylinder release assembly, a cylinder valve and a gas cylinder. The gas cylinder release assembly comprises an elastic piece, a plugging piece and a temperature sensing element which are arranged in a mounting cavity on the cylinder valve, the plugging piece is arranged in the mounting cavity in a sliding mode, the elastic piece and the temperature sensing element are arranged on the two opposite sides of the plugging piece respectively, the temperature sensing element is arranged close to an opening of the mounting cavity, when the temperature is lower than a preset temperature threshold value, the plugging piece is limited by the temperature sensing element, the elastic piece is compressed to store energy, and the plugging piece cuts off the discharging channel; when the temperature sensing element is melted or broken, the blocking piece is unlimited, the elastic piece releases energy to push the blocking piece to slide, and the discharge channel is conducted; the discharge channel comprises an air inlet part and an air outlet part which are communicated through the mounting cavity, and the sliding direction of the plugging piece is orthogonal to the air inlet direction of the air inlet part. According to the gas cylinder release assembly, the blocking piece can balance the gas pressure borne by the blocking piece, the gas pressure cannot be conducted to the temperature sensing element, and opening of the release assembly is more controllable.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid storage equipment, in particular to a gas cylinder relief component. The utility model also relates to a bottle valve provided with the above-mentioned gas cylinder relief component. At the same time, the utility model also relates to a gas storage cylinder provided with the above-mentioned bottle valve. Background Art

[0002] In a vehicle-mounted hydrogen storage system, a bottle valve is installed at the inlet of a gas storage cylinder. The bottle valve generally includes a filter, a manual shut-off valve, a solenoid valve, an emergency relief valve, a thermal relief device (TPRD), a temperature sensor and an overcurrent valve, which are used to control the hydrogen supply and hydrogenation of the gas cylinder and the relief of hydrogen when the temperature of the gas cylinder exceeds the set temperature. The thermal relief device belongs to a temperature-sensing relief module. When the temperature of the environment where the gas cylinder is located reaches 110±5°C, it is activated, and the plugging member blocking the relief channel in the thermal relief device pops out, so that hydrogen is discharged from the outlet of the thermal relief device to prevent accidents such as deflagration and explosion caused by overheating and overpressure of hydrogen in the hydrogen storage cylinder.

[0003] In the structure of the traditional thermal relief device, a relief component is arranged in the relief channel to cut off or conduct the relief channel. Due to the structure of the relief channel, the plugging member in the relief component conducts all the gas pressure in the gas cylinder to the temperature-sensing element. The temperature-sensing element, such as a fusible alloy part, has a low yield strength. When the diameter of the plugging member is too large, the fusible alloy part will be damaged, resulting in leakage or premature pressure relief of the relief component before reaching the safe temperature. Summary of the Utility Model

[0004] In view of this, the utility model aims to provide a gas cylinder relief component to improve the controllability of the opening of the relief component.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A gas cylinder relief component includes an elastic member, a plugging member and a temperature-sensing element arranged in an installation cavity on a bottle valve;

[0007] The plugging member is slidably arranged in the installation cavity, and the elastic member and the temperature-sensing element are arranged on two opposite sides of the plugging member;

[0008] When the temperature is lower than a preset temperature threshold, the plugging member is limited by the temperature-sensing element, the elastic member is compressed to store energy, and the plugging member cuts off the relief channel in the bottle valve. When the preset temperature threshold is reached, the temperature-sensing element melts or breaks and is discharged from the opening, and the limitation on the plugging member is released. The elastic member releases energy and pushes the plugging member to slide to conduct the relief channel;

[0009] Wherein, the discharge channel includes an air inlet part and an air outlet part which are connected through the installation cavity, and the sliding direction of the blocking member is arranged orthogonally to the air inlet direction of the air inlet part.

[0010] Furthermore, the air inlet portion and the air outlet portion are staggered in the axial direction of the installation cavity.

[0011] Furthermore, a sealing member is provided between the blocking member and the bottle valve, and the sealing member is used to seal the gap between the blocking member and the inner wall of the installation cavity.

[0012] Furthermore, the sealing member includes two sealing rings arranged at intervals on the blocking member; when the discharge channel is cut off, the blocking member blocks the outlet end of the air inlet part, and the two sealing rings are respectively located on both sides of the outlet end.

[0013] Furthermore, a fastener is provided at the opening of the installation cavity, and a through hole is provided on the fastener to connect the installation cavity with the outside world; when the temperature is lower than a preset temperature threshold, the fastener confines the temperature sensing element in the installation cavity, and when the preset temperature threshold is reached, the temperature sensing element is discharged from the installation cavity through the through hole.

[0014] Furthermore, the fastener is screwed at the opening.

[0015] Furthermore, the elastic member is a spring.

[0016] Furthermore, the temperature sensing element is made of fusible alloy or temperature sensing glass bulb.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] The gas cylinder discharge assembly described in the utility model is provided with an elastic member, a plugging member and a temperature sensing element in the mounting cavity on the cylinder valve, so that the elastic member and the temperature sensing element are respectively arranged on two opposite sides of the plugging member, and the melting state of the temperature sensing element is utilized to realize the conduction of the discharge channel, thereby realizing the discharge of the gas pressure, and at the same time, the sliding direction of the plugging member is arranged to be orthogonal to the air intake direction of the air intake part, so that the airflow of the air intake part acts on the plugging member in a direction perpendicular to the sliding direction of the plugging member, at this time, the plugging member can balance the gas pressure received, and will not transmit the gas pressure to the temperature sensing element, that is, the temperature sensing element does not directly receive the gas pressure, but is affected by the elastic force of the elastic member, thereby making the opening of the discharge assembly more controllable.

[0019] In addition, the intake part and the outlet part are arranged offset axially in the installation cavity, which has a simple structure, is convenient for design and implementation, and is also beneficial to the arrangement of the elastic member, the plugging member and the temperature sensing element. The sealing member arranged between the plugging member and the bottle valve can seal the gap between the plugging member and the inner wall of the installation cavity, thereby preventing gas leakage. The sealing member adopts two sealing rings arranged at intervals. In the state where the discharge channel is truncated, the sealing rings are respectively located on both sides of the outlet end, which can effectively prevent the gas in the intake part from leaking to the outlet part and the opening, and has the characteristics of reliable sealing and low cost.

[0020] In addition, a fastener is arranged at the opening of the installation cavity, which is beneficial to restraining the temperature sensing element in the installation cavity. The through hole arranged on the fastener can communicate the installation cavity with the outside, which is beneficial to the molten temperature sensing element flowing out of the installation cavity through the through hole, so as to facilitate triggering the movement of the plugging member and conducting the discharge channel. The fastener is fixed at the opening in a screwed manner. On the one hand, it is convenient for the installation of the elastic member, the plugging member and the temperature sensing element. On the other hand, it can better limit the temperature sensing element in the installation cavity, and is also beneficial to replacing a new solid state temperature sensing element, so that the elastic member and the plugging member can be reused.

[0021] Another object of the present invention is to provide a bottle valve, on which the gas cylinder discharge assembly as described above is provided.

[0022] Still another object of the present invention is to provide a gas storage cylinder, on which the above-mentioned bottle valve is provided.

[0023] The bottle valve and the gas storage cylinder of the present invention have the same beneficial effects as the above-mentioned gas cylinder discharge assembly relative to the prior art, and will not be elaborated here. Description of the Drawings

[0024] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0025] Figure 1 is a schematic structural diagram of the application state of the discharge assembly according to the embodiment of the present invention;

[0026] Figure 2 is Figure 1 a sectional view taken along the A-A view in

[0027] Description of the reference numerals:

[0028] 1, valve body; 2, plugging member; 3, elastic member; 4, temperature sensing element; 5, fastener; 6, sealing ring; 100, installation cavity; 101, intake part; 102, outlet part; 501, through hole. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection member" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected 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 the present utility model can be understood in combination with specific situations.

[0032] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0033] Embodiment 1

[0034] This embodiment relates to a gas cylinder relief assembly, which improves the controllability of the opening of the relief assembly.

[0035] In the structure of the bottle valve, such as the bottle valve of a hydrogen storage cylinder, it is usually provided with a thermal pressure relief device (TPRD), which is activated when the temperature of the environment where the gas cylinder is located reaches 110 ± 5 °C, so that the plugging member releases the plugging of the pressure relief channel, and thus hydrogen is discharged from the pressure relief channel. However, in the traditional thermal pressure relief device in terms of structure, a relief assembly is arranged in the relief channel to cut off or conduct the relief channel. Due to the structural setting of the relief channel, the plugging member in the relief assembly conducts all the gas pressure in the gas cylinder to the temperature sensing element, and the temperature sensing element, such as a fusible alloy part, has a low yield strength. When the diameter of the plugging member is too large, the fusible alloy part will be damaged, resulting in leakage or premature pressure relief of the relief assembly before reaching the safe temperature.

[0036] Therefore, in view of the deficiencies of the existing relief assembly in the prior art, this embodiment proposes a new gas cylinder relief assembly. And in terms of the overall composition, refer to Figure 1 and Figure 2As shown in the figure, the gas cylinder relief assembly of this embodiment includes an elastic member 3, a plugging member 2, and a temperature sensing element 4 disposed in the installation cavity 100 provided on the bottle valve. Among them, the plugging member 2 is slidably disposed in the installation cavity 100, the elastic member 3 and the temperature sensing element 4 are respectively arranged on two opposite sides of the plugging member 2, and the temperature sensing element 4 is arranged close to the open-shaped opening of the installation cavity 100.

[0037] When the temperature is lower than the preset temperature threshold, the plugging member 2 is limited by the temperature sensing element 4, the elastic member 3 is compressed and stores energy, and the plugging member 2 cuts off the relief channel in the bottle valve. When the preset temperature threshold is reached, the temperature sensing element 4 melts or breaks and is discharged from the opening, and the limitation on the plugging member 2 is released. The elastic member 3 releases energy and pushes the plugging member 2 to slide to conduct the relief channel. The relief channel in the bottle valve includes an intake part 101 and an outlet part 102 communicated through the installation cavity 100, and the sliding direction of the plugging member 2 is orthogonally arranged with the intake direction of the intake part 101.

[0038] At this time, in the above structure, the elastic member 3, the plugging member 2, and the temperature sensing element 4 are arranged in the installation cavity 100 on the bottle valve, so that the elastic member 3 and the temperature sensing element 4 are respectively arranged on two opposite sides of the plugging member 2, and the melting state of the temperature sensing element 4 is used to realize the conduction of the relief channel and the release of the gas pressure. At the same time, the sliding direction of the plugging member 2 is set to be orthogonal to the intake direction of the intake part 101, so that the airflow of the intake part 101 acts on the plugging member 2 along the direction perpendicular to the sliding of the plugging member 2 respectively. At this time, the plugging member 2 can balance the gas pressure received and will not conduct the gas pressure to the temperature sensing element 4, that is, the temperature sensing element 4 does not directly receive the gas pressure but is subject to the elastic force of the elastic member 3, thereby effectively preventing the gas pressure from damaging the temperature sensing element 4, and thus making the opening of the relief assembly more controllable.

[0039] It should be noted that the above preset temperature threshold, that is, the temperature when the temperature sensing element is activated, for a hydrogen storage cylinder, this preset temperature threshold is 110±5°C. The temperature sensing element of this embodiment is preferably an easily fusible alloy part or a temperature sensing glass bulb. When the temperature threshold is reached, the easily fusible alloy part melts and is discharged from the opening, or the temperature sensing glass bulb breaks and is discharged from the opening. Then, the limitation on the plugging member can be released, and the plugging member slides under the drive of the energy release of the elastic member and conducts the relief channel.

[0040] Specifically, continue to refer to Figure 1 and Figure 2As shown in the figure, in this embodiment, the installation cavity 100 is specifically arranged on the valve body 1 of the bottle valve. The installation cavity 100 is in an open shape and has an opening on the side of the valve body 1. The gas cylinder relief assembly includes an elastic member 3, a plugging member 2, and a temperature sensing element 4 arranged in the installation cavity 100. Among them, the elastic member 3 is preferably a spring, which has a simple structure, low cost, and good elasticity. In addition, in this embodiment, the temperature sensing element 4 is specifically described in detail taking a fusible alloy member as an example.

[0041] During specific implementation, both ends of the elastic member 3, that is, the spring, respectively abut against the inner wall of the installation cavity 100 and the end of the plugging member 2. At this time, the setting of the spring can maintain the stability of the plugging member 2, and when the fusible alloy member melts, the elastic force of the spring can drive the plugging member 2 to move.

[0042] In this embodiment, the plugging member 2 and the fusible alloy member are limited in the installation cavity 100. The fusible alloy member can be in a first state of not melting and a second state of melting. In the first state, the elastic member 3 is compressed and stores energy, and the plugging member 2 cuts off the relief passage in the bottle valve. In the second state, the fusible alloy member flows out from the opening, and the plugging member 2 is pushed and slides under the action of the energy release of the elastic member 3, and the relief passage is conducted. It should be noted here that the fusible alloy member in this embodiment has good fluidity and temperature control performance, and the melting point temperature of this fusible alloy member is between 105°C and 115°C.

[0043] See Figure 2 As shown in the figure, the relief passage on the bottle valve includes an intake part 101 and an outlet part 102, and the intake part 101 and the outlet part 102 are communicated through the installation cavity 100. As a preferred implementation manner, in this embodiment, the intake part 101 and the outlet part 102 are arranged in a staggered manner in the axial direction of the installation cavity 100. In this way, it is not only convenient for the processing and forming of the relief passage, but also beneficial to the processing of the installation cavity 100, and at the same time, it is also convenient for the arrangement of the elastic member 3, the plugging member 2, and the temperature sensing element 4. And during specific implementation, the plugging member 2 specifically plugs at the intake part 101 and cuts off the connection between the intake part 101 and the outlet part 102, that is, cuts off the relief passage.

[0044] As a further preferred implementation manner, in this embodiment, a sealing member is provided between the plugging member 2 and the bottle valve. The sealing member is used to seal the gap between the plugging member 2 and the inner wall of the installation cavity 100. At this time, the setting of the sealing member can effectively prevent gas leakage. Specifically, as Figure 2 shown, the sealing member includes two sealing rings 6 arranged at intervals on the plugging member 2. In the state where the relief passage is cut off, the plugging member 2 plugs at the gas storage end of the intake part, and the two sealing rings 6 are respectively located on both sides of the outlet end, that is, the two sealing rings 6 are respectively arranged close to both ends of the plugging member 2. At this time, the two sealing rings 6 arranged at intervals, that is Figure 2The left and right sealing rings 6 shown in the figure, the sealing ring 6 at the left end can effectively prevent the gas in the air inlet part 101 from leaking to the air outlet part 102, and the sealing ring 6 at the right end can effectively prevent the gas in the air inlet part 101 from leaking to the entrance of the installation cavity 100.

[0045] Still viewing Figure 2 As shown, in this embodiment, as a preferred implementation, a fastener 5 is provided at the opening of the installation cavity 100, and a through hole 501 is provided on the fastener 5 to connect the inside of the installation cavity 100 with the outside. When the temperature is lower than the preset temperature threshold, the fastener 5 constrains the temperature sensing element 4 in the installation cavity 100, and when the temperature is lower than the preset temperature threshold, the temperature sensing element 4 is discharged from the installation cavity 100 through the through hole 501, that is, when the fusible alloy part is not melted, the fusible alloy part is constrained in the installation cavity 100 by the fastener 5, and when the fusible alloy part is melted, the melted fusible alloy part flows out of the installation cavity 100 from the through hole 501.

[0046] It is worth mentioning that the fastener 5 of this embodiment is screwed at the opening. At this time, by screwing the fastener 5 at the opening of the installation cavity 100, on the one hand, it is convenient to install the elastic member 3, the blocking member 2 and the temperature sensing element 4, and on the other hand, it can better limit the temperature sensing element 4 in the installation cavity 100, and it is also convenient to replace a new solid-state temperature sensing element 4, so that the elastic member 3 and the blocking member 2 can be reused.

[0047] Of course, it is understandable that in addition to being fixedly connected to the opening of the installation cavity 100 by screwing, the fastener 5 of this embodiment can also be fixed to the opening by snapping, or the fastener 5 and the inner wall of the installation cavity 100 can be connected together by interference fitting. This is also possible.

[0048] When the gas cylinder discharge assembly of this embodiment is used, under normal conditions, that is, when the outside environment does not reach the melting point of the fusible alloy, the blocking member 2 blocks between the air inlet portion 101 and the air outlet portion 102 to cut off the discharge channel. When the outside environment temperature reaches the melting point of the fusible alloy, the fusible alloy melts and flows out of the installation cavity 100 from the through hole 501. At this time, the blocking member 2 moves under the push of the spring elastic force. When the sealing ring 6 on the left moves to the right and exceeds the outlet end of the air inlet portion 101, the air inlet portion 101 and the air outlet portion 102 are connected, that is, the pressure relief channel is connected, and the gas can flow along the Figure 2 Release in the direction of the arrow shown.

[0049] For the gas cylinder relief assembly of this embodiment, by optimizing the pressure relief passage and the installation cavity 100, and using the melted or ruptured state of the temperature sensing element 4 to achieve the conduction of the relief passage, the gas pressure is relieved. Moreover, the sliding direction of the plugging member 2 is set orthogonally to the gas inlet direction of the air inlet part 101. In this way, the two ends of the plugging member 2 bear the same gas pressure, the plugging member 2 is in force balance, and the gas pressure will not be transmitted to the temperature sensing element 4, thus avoiding damage to the temperature sensing element 4 caused by the gas pressure, and making the opening of the relief assembly more controllable.

[0050] Embodiment Two

[0051] This embodiment relates to a bottle valve, and the gas cylinder relief assembly of Embodiment One is provided on the bottle valve.

[0052] For the bottle valve of this embodiment, by adopting the gas cylinder relief assembly of Embodiment One, the opening of the relief assembly can be made more controllable, thus facilitating the improvement of the use reliability of the bottle valve.

[0053] Meanwhile, this embodiment also relates to a gas storage cylinder, and the above-mentioned bottle valve is provided on the gas storage cylinder.

[0054] For the gas storage cylinder of this embodiment, by adopting the above-mentioned bottle valve, the opening of the relief assembly can also be made more controllable, thus facilitating the improvement of the use reliability of the bottle valve and the gas storage cylinder.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas cylinder relief assembly, characterized in that: It includes an elastic member (3), a plugging member (2) and a temperature sensing element (4) disposed in an installation cavity (100) on a bottle valve; The plugging member (2) is slidably disposed in the installation cavity (100), the elastic member (3) and the temperature sensing element (4) are respectively arranged on two opposite sides of the plugging member (2), and the temperature sensing element (4) is arranged close to the open end of the installation cavity (100); When the temperature is lower than a preset temperature threshold, the plugging member (2) is limited by the temperature sensing element (4), the elastic member (3) is compressed to store energy, and the plugging member (2) cuts off the relief passage in the bottle valve. When the preset temperature threshold is reached, the temperature sensing element (4) melts or breaks and is discharged from the opening, and the limitation on the plugging member (2) is released. The elastic member (3) releases energy and pushes the plugging member (2) to slide to conduct the relief passage; Wherein, the relief passage includes an air inlet part (101) and an air outlet part (102) communicated through the installation cavity (100), and the sliding direction of the plugging member (2) is orthogonally arranged with the air inlet direction of the air inlet part (101).

2. The gas cylinder relief assembly according to claim 1, characterized in that: The air inlet part (101) and the air outlet part (102) are arranged offset in the axial direction of the installation cavity (100).

3. The gas cylinder relief assembly according to claim 2, characterized in that: A sealing member is provided between the plugging member (2) and the bottle valve, and the sealing member is used to seal the gap between the plugging member (2) and the inner wall of the installation cavity (100).

4. The gas cylinder relief assembly according to claim 3, characterized in that: The sealing member includes two sealing rings (6) arranged at intervals on the plugging member (2); In the state where the relief passage is cut off, the plugging member (2) plugs at the air outlet end of the air inlet part, and the two sealing rings (6) are respectively located on both sides of the air outlet end.

5. The gas cylinder relief assembly according to claim 1, characterized in that: A fastener (5) is provided at the opening of the installation cavity (100), and a through hole (501) communicating the inside of the installation cavity (100) with the outside is provided on the fastener (5); When the temperature is lower than a preset temperature threshold, the fastener (5) confines the temperature sensing element (4) in the installation cavity (100). When the preset temperature threshold is reached, the temperature sensing element (4) is discharged from the installation cavity (100) through the through hole (501).

6. The gas cylinder relief assembly according to claim 5, characterized in that: The fastener (5) is screwed at the opening.

7. The gas cylinder relief assembly according to claim 1, characterized in that: The elastic member (3) is a spring.

8. The gas cylinder relief assembly according to any one of claims 1 to 7, characterized in that: The temperature sensing element (4) is an easily fusible alloy member or a temperature sensing glass bulb.

9. A bottle valve, characterized in that: The bottle valve is provided with the gas cylinder relief assembly according to any one of claims 1 to 8.

10. A gas storage cylinder, characterized in that: The gas storage cylinder is provided with the bottle valve according to claim 9.

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