Pressure release valve for hydrogen fuel cell system

Abstract

The utility model discloses a pressure release valve for a hydrogen fuel cell system, and relates to the technical field of fuel cells. A fixing column is fixedly connected to the bottom of a top shell, a connecting column is fixedly connected to the bottom of the fixing column, an air inlet barrel is fixedly connected to the bottom of the connecting column, a connecting block is arranged in the air inlet barrel, a fixing ring is fixedly connected to the bottom of the connecting block, and air outlet holes are formed in the inner wall of the fixing ring. A plurality of air outlet holes are formed in the top shell, the multiple air outlet holes are formed in an annular array mode, a rotating block is arranged above the top shell, and a threaded rod is fixedly connected to the bottom of the rotating block. The fixing ring is arranged, specifically, gas pressure enters the fixing ring, due to the fact that the pressure is increased, the connecting block moves upwards, the fixing ring is driven by the movement of the connecting block to move synchronously, after the gas outlet holes in the fixing ring are unlimited, the gas pressure can be exhausted, and the whole device is protected; and the use safety of the equipment is also improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fuel cells, and in particular relates to a pressure relief valve for a hydrogen fuel cell system. Background Art

[0002] A hydrogen fuel cell is a device that converts chemical energy into electrical energy. It has the advantages of being clean, environmentally friendly, low noise, and having high energy density. These characteristics have led to the widespread use of hydrogen fuel cells in many fields, including automobiles, electricity, and aerospace, with hydrogen being a key fuel supply source. In order to ensure the stable operation of the fuel cell, hydrogen needs to enter the fuel cell stack at a certain flow rate and pressure to supply the gas required for the electrochemical reaction, so a pressure relief valve is required.

[0003] Pressure relief valves are generally used in hydrogen pipelines. The pressure entering the fuel cell stack is relatively low. If the external pressure exceeds the pressure, the fuel cell stack will be damaged. Therefore, when the pressure exceeds a certain level, if the pressure cannot be discharged in time, it will cause damage to the device or even an explosion, resulting in casualties. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure relief valve for a hydrogen fuel cell system, in which gas pressure enters the interior of a fixed ring. Due to the increase in pressure, the connecting block is moved upward, and the movement of the connecting block drives the fixed ring to move synchronously. When the air outlet on the fixed ring is released from restriction, the gas pressure can be discharged, which solves the existing problem that when the pressure exceeds a certain value, if the pressure cannot be discharged in time, it will cause damage to the device or even explosion, resulting in casualties.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a pressure relief valve for a hydrogen fuel cell system, comprising a top shell, a fixing column fixedly connected to the bottom of the top shell, a connecting column fixedly connected to the bottom of the fixing column, an air intake barrel fixedly connected to the bottom of the connecting column, a connecting block provided inside the air intake barrel, a fixing ring fixedly connected to the bottom of the connecting block, an air outlet hole provided on the inner wall of the fixing ring, a number of the air outlet holes being arranged in a circular array, the utility model arranges a fixing ring, specifically, gas pressure enters the interior of the fixing ring, due to the increase in pressure, the connecting block is moved upward, the movement of the connecting block drives the fixing ring to move synchronously, when the air outlet hole on the fixing ring is released from restriction, the gas pressure can be discharged, which protects the device as a whole and improves the safety of the device when in use.

[0007] Furthermore, a rotating block is provided above the top shell, a threaded rod is fixedly connected to the bottom of the rotating block, a threaded hole is opened on the top of the fixed column, the inner wall of the threaded hole is threadedly connected to the outer surface of the threaded rod, and a rotating shaft is fixedly connected to the bottom of the threaded rod. The utility model arranges a rotating block, specifically, the threaded rod is rotated by twisting the rotating block, and the rotating shaft is driven to move downward, exerting pressure on the spring, so that the spring exerts a slowly increasing force on the moving block, so that the device can flexibly adjust the valve pressure, can adapt to the valve pressure required in different scenarios, and improve the convenience of the device.

[0008] Furthermore, a spring is rotatably connected to the bottom of the rotating shaft, a movable groove is opened on the top of the connecting column, a rubber ring is fixedly connected to the inner wall of the connecting column, and the inner wall of the rubber ring contacts a movable block. The seal between the rubber ring and the movable block can prevent gas pressure from entering the interior of the device through the movable block and the rubber ring, causing damage to the equipment, thereby effectively preventing danger, improving the safety of the device and extending the service life of the equipment.

[0009] Furthermore, the bottom of the moving block is fixedly connected to the top of the connecting block, a sealing ring is fixedly connected to the bottom of the inner wall of the air inlet barrel, and an outlet tube is fixedly connected to the left side of the air inlet barrel. The outer surface of the fixed ring is in contact with the inner wall of the sealing ring. The setting of the outlet tube can guide the flow of gas in the device so that the gas can be discharged from the inside of the device along the outlet tube. The setting of the sealing ring can effectively prevent the pressure from returning to zero due to gas leakage, thereby improving the safety of the equipment in use and ensuring the safety of the user.

[0010] Furthermore, an air intake hole is provided at the bottom of the inner wall of the air intake barrel, a second threaded hole is provided at the bottom of the air intake barrel, and a rubber pad is fixedly connected to the bottom of the air intake barrel. The opening of the second threaded hole enables a better connection between the device and the hydrogen rod, and the provision of the rubber pad can effectively prevent gas leakage, making the device more secure when fixed and having a better sealing effect.

[0011] Furthermore, the moving block is adapted to the rubber ring, the top of the moving block is fixedly connected to the bottom of the spring, the bottom of the connecting block is in contact with the top of the sealing ring, and the connection between the moving block and the spring enables the moving block to be always subjected to the force of the spring, thereby pressing the connecting block to achieve a sealing effect, thereby ensuring the sealing effect of the equipment when in use. When the pressure is greater than the thrust, the spring will drive the connecting block to move due to the pressure it receives.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model sets a fixing ring, specifically, gas pressure enters the interior of the fixing ring. Due to the increase in pressure, the connecting block is moved upward, and the movement of the connecting block drives the fixing ring to move synchronously. When the air outlet on the fixing ring is released from restriction, the gas pressure can be discharged, which protects the device as a whole and improves the safety of the equipment when in use.

[0014] 2. The utility model sets a rotating block, specifically, by twisting the rotating block to rotate the threaded rod, and at the same time drives the rotating shaft to move downward, exerting pressure on the spring, so that the spring exerts a slowly increasing force on the moving block, so that the device can flexibly adjust the valve pressure, can adapt to the valve pressure required in different scenarios, and improve the convenience of the device.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for describing the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the fixed column of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the rotating block of the utility model;

[0019] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0020] Figure 4 This is a schematic diagram of the structure of the fixing ring of the utility model;

[0021] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of B.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Top shell; 11. Fixed column; 111. Connecting column; 12. Air inlet barrel; 2. Rotating block; 21. Threaded hole 1; 211. Threaded rod; 22. Rotating shaft; 3. Spring; 31. Moving groove; 32. Rubber ring; 33. Moving block; 4. Connecting block; 41. Fixed ring; 411. Air outlet; 42. Air outlet tube; 43. Sealing ring; 5. Air inlet; 51. Threaded hole 2; 52. Rubber pad. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 As shown, the utility model is a pressure relief valve for a hydrogen fuel cell system, including a top shell 1, a fixing column 11 is fixedly connected to the bottom of the top shell 1, a connecting column 111 is fixedly connected to the bottom of the fixing column 11, an air inlet barrel 12 is fixedly connected to the bottom of the connecting column 111, a connecting block 4 is arranged inside the air inlet barrel 12, a fixing ring 41 is fixedly connected to the bottom of the connecting block 4, an air outlet hole 411 is opened on the inner wall of the fixing ring 41, and the number of the air outlet holes 411 is several, and the several air outlet holes 411 are arranged in a ring array. The utility model arranges the fixing ring 41, specifically, the gas pressure enters the inside of the fixing ring 41, due to the increase in pressure, the connecting block 4 is moved upward, and the movement of the connecting block 4 drives the fixing ring 41 to move synchronously. When the air outlet hole 411 on the fixing ring 41 is released from the restriction, the gas pressure can be discharged, which plays a role in protecting the device as a whole and also improves the safety of the equipment when in use.

[0026] A rotating block 2 is arranged above the top shell 1, and a threaded rod 211 is fixedly connected to the bottom of the rotating block 2. A threaded hole 21 is opened on the top of the fixed column 11, and the inner wall of the threaded hole 21 is threadedly connected to the outer surface of the threaded rod 211, and a rotating shaft 22 is fixedly connected to the bottom of the threaded rod 211. The utility model arranges the rotating block 2, specifically, by twisting the rotating block 2 to rotate the threaded rod 211, and at the same time drives the rotating shaft 22 to move downward, exerting pressure on the spring 3, so that the spring 3 exerts a slowly increasing force on the moving block 33, so that the device can flexibly adjust the valve pressure, can adapt to the valve pressure required in different scenes, and improve the convenience of the device.

[0027] A spring 3 is rotatably connected to the bottom of the rotating shaft 22 , a moving groove 31 is opened on the top of the connecting column 111 , a rubber ring 32 is fixedly connected to the inner wall of the connecting column 111 , and a moving block 33 is contacted to the inner wall of the rubber ring 32 .

[0028] The bottom of the moving block 33 is fixedly connected to the top of the connecting block 4 , a sealing ring 43 is fixedly connected to the bottom of the inner wall of the air inlet barrel 12 , an air outlet tube 42 is fixedly connected to the left side of the air inlet barrel 12 , and the outer surface of the fixing ring 41 contacts the inner wall of the sealing ring 43 .

[0029] An air inlet hole 5 is provided at the bottom of the inner wall of the air inlet barrel 12 , a threaded hole 2 51 is provided at the bottom of the air inlet barrel 12 , and a rubber pad 52 is fixedly connected to the bottom of the air inlet barrel 12 .

[0030] The moving block 33 is matched with the rubber ring 32 , the top of the moving block 33 is fixedly connected to the bottom of the spring 3 , and the bottom of the connecting block 4 is in contact with the top of the sealing ring 43 .

[0031] A specific application of this embodiment is: the hydrogen pressure pipeline is connected to the bottom of the equipment through the threaded hole 51, and the two are sealed by the setting of the rubber pad 52 to avoid the danger caused by gas leakage. The gas pressure enters the inside of the air inlet 5, and exerts pressure on the fixed ring 41 and the connecting block 4. Due to the pressure exerted by the spring 3 on the moving block 33, the smaller pressure will not push up the connecting block 4. When the pressure is greater than the thrust of the spring, the gas pressure will push up the connecting block 4, and the movement of the connecting block 4 will drive the fixed ring 41 to move synchronously. Since a plurality of air outlet holes 411 are provided on the outer surface of the fixed ring 41, and the plurality of air outlet holes are arranged in a ring array, when the position of the air outlet hole 411 is higher than the sealing ring 43, the gas pressure will be pushed up from the plurality of air outlet holes 411. The gas is discharged from the air outlet 411 into the air inlet barrel 12. Since the moving block 33 and the rubber ring 32 are in a sealed state, the gas pressure will be discharged from the inside of the device through the air outlet tube 42. When the pressure of the pressure valve needs to be adjusted, the rotating block 2 can be turned clockwise to make the threaded rod 211 rotate on the inner wall of the threaded hole 21, and at the same time drive the rotating shaft 22 to apply a thrust to the spring 3, so that the thrust of the spring 3 on the moving block 33 increases, and the gas pressure can be exhausted only when it is greater than the thrust. When the valve pressure needs to be reduced, the rotating block 2 can be turned counterclockwise to make the threaded rod 211 drive the rotating shaft 22 to move upward, so that the force of the spring 3 on the moving block 33 is reduced, which has the effect of reducing the valve pressure, so that the device can be flexible to adapt to different pressure-boosting devices.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure relief valve for a hydrogen fuel cell system, comprising a top shell (1), a fixing column (11) being fixedly connected to the bottom of the top shell (1), a connecting column (111) being fixedly connected to the bottom of the fixing column (11), and an air intake barrel (12) being fixedly connected to the bottom of the connecting column (111), characterized in that: A connecting block (4) is arranged inside the air inlet barrel (12); a fixing ring (41) is fixedly connected to the bottom of the connecting block (4); an air outlet hole (411) is opened on the inner wall of the fixing ring (41); the number of the air outlet holes (411) is several, and the several air outlet holes (411) are arranged in a ring array.

2. A pressure relief valve for a hydrogen fuel cell system according to claim 1, characterized in that: A rotating block (2) is arranged above the top shell (1), a threaded rod (211) is fixedly connected to the bottom of the rotating block (2), and a threaded hole (21) is opened at the top of the fixing column (11).

3. A pressure relief valve for a hydrogen fuel cell system according to claim 2, characterized in that: The inner wall of the threaded hole 1 (21) is threadedly connected to the outer surface of the threaded rod (211), and the bottom of the threaded rod (211) is fixedly connected to a rotating shaft (22).

4. A pressure relief valve for a hydrogen fuel cell system according to claim 3, characterized in that: The bottom of the rotating shaft (22) is rotatably connected to a spring (3), the top of the connecting column (111) is provided with a moving groove (31), the inner wall of the connecting column (111) is fixedly connected to a rubber ring (32), and the inner wall of the rubber ring (32) contacts a moving block (33).

5. A pressure relief valve for a hydrogen fuel cell system according to claim 4, characterized in that: The bottom of the moving block (33) is fixedly connected to the top of the connecting block (4), and the bottom of the inner wall of the air inlet barrel (12) is fixedly connected to a sealing ring (43).

6. A pressure relief valve for a hydrogen fuel cell system according to claim 1, characterized in that: The left side of the air inlet barrel (12) is fixedly connected with an air outlet cylinder (42), and the outer surface of the fixing ring (41) is in contact with the inner wall of the sealing ring (43).

7. A pressure relief valve for a hydrogen fuel cell system according to claim 1, characterized in that: An air inlet hole (5) is provided at the bottom of the inner wall of the air inlet barrel (12), a second threaded hole (51) is provided at the bottom of the air inlet barrel (12), and a rubber pad (52) is fixedly connected to the bottom of the air inlet barrel (12).

8. A pressure relief valve for a hydrogen fuel cell system according to claim 4, characterized in that: The moving block (33) is matched with the rubber ring (32), the top of the moving block (33) is fixedly connected to the bottom of the spring (3), and the bottom of the connecting block (4) is in contact with the top of the sealing ring (43).

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