Connecting structure for inner container and end of hydrogen storage bottle

Abstract

The utility model discloses a hydrogen storage bottle inner container and end connecting structure which comprises a gas bottle inner container (1), the end of the gas bottle inner container (1) is provided with a metal end mounting hole (2), a metal end (3) is fixed on the gas bottle inner container (1) through a fastener (4), the outer wall of the fastener (4) is provided with a first annular part (5), and the first annular part (5) is provided with a second annular part (6). And a friction washer (6) is arranged between the first annular part (5) and the inner wall of the gas cylinder liner (1). According to the utility model, the assembly stress can be eliminated, and the sealing effect can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a connecting structure, in particular to a hydrogen storage bottle inner container and end head connecting structure. BACKGROUND

[0002] The hydrogen storage bottle is an important part of the fuel cell vehicle on-board hydrogen system, and is an important device for storing high-pressure hydrogen on the fuel cell vehicle. In the design and manufacturing process of the hydrogen storage bottle, the assembly of the inner container is a key step. The end head usually includes a connecting interface and other necessary connecting devices. In order to ensure the sealing and safety of the hydrogen storage bottle, the inner container and the end head need to be tightly matched, and a certain torque must be applied during assembly.

[0003] During assembly, due to the unevenness of the inner container assembly surface or the large difference in material hardness, shear force is easily generated. This stress can cause the following problems: 1. Sealing failure, assembly stress can cause damage to the connection of the inner container, thereby reducing the sealing performance of the hydrogen storage bottle and increasing the risk of hydrogen leakage. 2. Material fatigue, long-term assembly stress can cause material fatigue, increasing the safety hazards of the hydrogen storage bottle during use. SUMMARY

[0004] The utility model aims at providing a hydrogen storage bottle inner container and end head connecting structure to solve the technical problems in the prior art, which can eliminate assembly stress and improve sealing effect.

[0005] The utility model provides a hydrogen storage bottle inner container and end head connecting structure, including the gas cylinder inner container, the end of gas cylinder inner container has metal end head mounting hole, metal end head passes through fastener and is fixed on gas cylinder inner container, the outer wall of fastener has first annular portion, and the first annular portion is equipped with friction washer between the inner wall of gas cylinder inner container.

[0006] In the foregoing hydrogen storage bottle inner container and end head connecting structure, preferably, the metal end head includes a metal pipe and a second annular portion, and the second annular portion is located on the outer wall of the lower end of the metal pipe.

[0007] In the foregoing hydrogen storage bottle inner container and end head connecting structure, preferably, the inner hole of the metal pipe is divided into a first section and a second section, the first section is located above the second section, the diameter of the first section is smaller than that of the second section, a first thread is formed on the first section, and a second thread is formed on the second section.

[0008] In the foregoing hydrogen storage bottle inner container and end head connecting structure, preferably, a groove is formed on the gas cylinder inner container for accommodating the second annular portion, and the groove is coaxial with the metal end head mounting hole.

[0009] Preferably, the fastener comprises a tubular portion and the first annular portion, the first annular portion is located at the lower end of the outer wall of the tubular portion, and a third thread is formed on the outer wall of the tubular portion.

[0010] Preferably, the inner diameter of the tubular portion is equal to the diameter of the first section of the inner hole of the metal pipe.

[0011] Preferably, two tool grooves are formed at the lower end of the tubular portion, and the two tool grooves are symmetrical relative to the axis of the tubular portion.

[0012] Compared with the prior art, the utility model discloses a gas cylinder inner container, the end of gas cylinder inner container has metal end head mounting hole, metal end head is fixed on gas cylinder inner container through fastener, and the outer wall of fastener has first annular portion, and first annular portion and the inner wall of gas cylinder inner container are equipped with friction washer.The utility model uses fastener to fix metal end head, realizes the quick installation and disassembly of metal end head, can provide effective stress absorption layer through the friction washer, disperses the stress generated in the assembly process through friction and elastic deformation, avoids the damage or material fatigue of sealing ring due to stress concentration, and in addition, the setting of friction washer also improves the sealing effect, prevents gas leakage.

[0013] The design of the friction washer makes the assembly process simpler and faster, reduces the dependence on high-precision processing equipment, and reduces the manufacturing cost. Since the friction washer has a long service life and good sealing performance, the replacement frequency is reduced, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structural schematic diagram of the utility model.

[0015] Mark explanation: gas cylinder inner container 1, metal end head mounting hole 2, metal end head 3, fastener 4, first annular portion 5, friction washer 6, metal pipe 7, second annular portion 8, first thread 9, second thread 10, recess 11, tubular portion 12, third thread 13, tool groove 14. DETAILED DESCRIPTION

[0016] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be explained as the limitation of the utility model.

[0017] Embodiment of the utility model: such as Figure 1As shown, a hydrogen storage bottle liner and end connection structure, comprising a gas cylinder liner 1, the end of the gas cylinder liner 1 has a metal end mounting hole 2, the metal end 3 is fixed on the gas cylinder liner 1 by fastener 4, the outer wall of the fastener 4 has a first annular part 5, the first annular part 5 and the inner wall of the gas cylinder liner 1 are provided with a friction washer 6.

[0018] The fastener 4 is located inside the gas cylinder liner 1, the upper end of the fastener 4 extends out of the gas cylinder liner 1 through the metal end mounting hole 2 and is threadedly connected with the metal end 3, the metal end 3 is fixed on the gas cylinder liner 1 by threadedly cooperating with the fastener 4. This fixing method is convenient for installing and dismounting the metal end 3.

[0019] After the fastener 4 is tightened with the metal end 3, the upper wall of the first annular part 5 on the fastener 4 extrudes the friction washer 6, so that the friction washer 6 is clamped between the first annular part 5 and the inner wall of the gas cylinder liner 1, an effective stress absorption layer is provided through the setting of the friction washer 6, the stress generated in the assembly process is dispersed through friction and elastic deformation, and damage or material fatigue of the sealing ring caused by stress concentration is avoided.

[0020] The setting of the friction washer 6 makes the stress evenly distributed on the entire contact surface, rather than concentrated in a local area, thereby improving the stability of the overall structure.

[0021] The friction washer 6 is made of high-performance material and has excellent fatigue resistance, which can maintain its structural integrity during multiple assembly and disassembly processes, prolonging the service life of the hydrogen storage bottle. The friction washer 6 can maintain stable performance within a wide temperature and pressure range and is not prone to aging or deformation, thereby ensuring reliable operation of the hydrogen storage bottle in various harsh environments.

[0022] In addition, by setting the friction washer 6, good sealing effect can be maintained in a high-pressure environment, and in extreme cases, the friction washer 6 can also play a certain buffering role to reduce damage caused by accidental impact or vibration.

[0023] Specifically, the metal end 3 includes a metal pipe 7 and a second annular part 8, the second annular part 8 is located on the outer wall of the lower end of the metal pipe 7.

[0024] The inner hole of the metal pipe 7 is divided into a first section and a second section, the first section is located above the second section, the diameter of the first section is smaller than that of the second section, a first thread 9 is formed on the first section, and a second thread 10 is formed on the second section.

[0025] The first thread 9 is used to connect the valve, and the second thread segment 10 is used to threadedly cooperate with the fastener 4.

[0026] The second annular part 8 is arranged in the metal pipe 7, and the second annular part 8 is arranged in the metal pipe 7 in a sleeving mode.

[0027] Further, the fastener 4 comprises a tubular part 12 and a first annular part 5, the first annular part 5 is arranged at the lower end of the outer wall of the tubular part 12, and the outer wall of the tubular part 12 is provided with a third thread 13.

[0028] The tubular part 12 is matched with the second thread 10 in the metal pipe 7 through the third thread 13, so that the second annular part 8 is matched with the first annular part 5 to clamp the area around the metal end head mounting hole 2, and the metal end head 3 is fixed on the gas cylinder liner 1.

[0029] The inner diameter of the tubular part 12 is equal to the diameter of the first section of the hole in the metal pipe 7. The lower end of the tubular part 12 is provided with two tool grooves 14, and the two tool grooves 14 are symmetrical relative to the axis of the tubular part 12.

[0030] The tool grooves 14 are arranged to facilitate the rotation of the fastener 4 by using tools, and facilitate the installation and disassembly.

[0031] The above describes the structure, characteristics and effect of the embodiment shown in the drawings, and the above is only the preferred embodiment of the utility model, but the utility model is not limited by the drawings, any change or modification within the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A structure for connecting the inner liner and end of a hydrogen storage cylinder, comprising a cylinder inner liner (1), characterized in that: The end of the gas cylinder liner (1) has a metal end mounting hole (2), and the metal end (3) is fixed on the gas cylinder liner (1) by a fastener (4). The outer wall of the fastener (4) has a first annular part (5), and a friction washer (6) is provided between the first annular part (5) and the inner wall of the gas cylinder liner (1).

2. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 1, characterized in that: The metal end (3) includes a metal tube (7) and a second annular portion (8), the second annular portion (8) being located on the outer wall of the lower end of the metal tube (7).

3. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 2, characterized in that: The inner hole of the metal tube (7) is divided into a first section and a second section. The first section is located above the second section. The diameter of the first section is smaller than that of the second section. A first thread (9) is formed on the first section, and a second thread (10) is formed on the second section.

4. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 3, characterized in that: The gas cylinder liner (1) has a groove (11) for accommodating the second annular portion (8), and the groove (11) is coaxial with the metal end mounting hole (2).

5. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 4, characterized in that: The fastener (4) includes a tubular portion (12) and a first annular portion (5), the first annular portion (5) being located at the lower end of the outer wall of the tubular portion (12), and a third thread (13) being formed on the outer wall of the tubular portion (12).

6. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 5, characterized in that: The inner diameter of the tubular portion (12) is equal to the diameter of the first section of the inner hole of the metal tube (7).

7. The connection structure between the inner liner and the end cap of the hydrogen storage cylinder according to claim 6, characterized in that: The lower end of the tubular portion (12) has two tool slots (14), which are symmetrical with respect to the axis of the tubular portion (12).

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