Fixing bandage capable of adapting to expansion of hydrogen storage tank

Abstract

The fixing bandage capable of adapting to the expansion of the hydrogen storage tank comprises a supporting frame and a bandage unit, a limiting groove is formed in the supporting frame, and the two ends of the bandage unit are connected with the supporting frame; the bandage unit comprises at least two straps which are sequentially connected through a first elastic fastening assembly, the first elastic fastening assembly is configured to enable the bandage unit to have telescopic elasticity in the length direction, the straps are connected with the supporting frame through a second elastic fastening assembly, and the second elastic fastening assembly is configured to enable the bandage unit to move in the axial direction of the limiting groove; according to the fixing bandage structure, through optimization design, when the hydrogen storage tank is fixed and formed, self-adaptive adjustment can be achieved during expansion and contraction of the hydrogen storage tank, and damage to the tank body is avoided while the fixing effect is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of hydrogen energy vehicles, and particularly relates to a fixing strap capable of adapting to the expansion of a hydrogen storage tank. Background Art

[0002] With the rapid development of hydrogen energy technology, hydrogen storage tanks are installed on hydrogen fuel cell vehicles as fuel systems. As the core component for hydrogen energy storage and transportation, the safety and reliability of hydrogen storage tanks are of crucial importance. During the use of hydrogen storage tanks, due to the change in the charging and discharging pressure of internal hydrogen and temperature fluctuations, the tank body will undergo a certain degree of expansion or contraction. According to relevant technical standards, the expansion amount of hydrogen storage tanks usually needs to be controlled within 2% to ensure its structural integrity and safety.

[0003] At present, the common fixing straps for hydrogen storage tanks on the market mostly adopt rigid or semi-rigid structures. Although they can provide a certain fixing effect, it is difficult to effectively cope with the expansion and contraction of hydrogen storage tanks. This fixing method exposes some problems in actual use: (1) Insufficient adaptability: Rigid straps cannot automatically adjust with the expansion and contraction of hydrogen storage tanks, which may cause the straps to be too tight or too loose, affecting the fixing effect; (2) Safety hazards: The stress concentration between the straps and the hydrogen storage tank may cause local damage to the tank body and even lead to safety accidents; (3) Short service life: Since the stress caused by expansion and contraction cannot be effectively relieved, the service lives of both the straps and the hydrogen storage tank will be affected. Therefore, it is necessary to optimize the structure of the existing fixing straps. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a fixing strap capable of adapting to the expansion of a hydrogen storage tank, enabling it to automatically adjust during the expansion and contraction of the hydrogen storage tank, ensuring the fixing effect while avoiding damage to the tank body.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a fixing strap capable of adapting to the expansion of a hydrogen storage tank, including a support frame and a strap unit. A limiting groove is provided on the support frame, and both ends of the strap unit are connected to the support frame; the strap unit includes at least two hoop bands sequentially connected by a first elastic fastening component. The first elastic fastening component is configured to enable the strap unit to have telescopic elasticity in the length direction. The hoop band is connected to the support frame through a second elastic fastening component, and the second elastic fastening component is configured to enable the strap unit to axially move along the limiting groove.

[0007] Preferably, the first elastic fastening component includes a connecting column, a connecting bolt, a locking nut, and a first elastic member; there are two connecting columns, which are respectively connected to two hoop bands, and the connecting bolt passes through the connecting column and the first elastic member and is connected to the locking nut.

[0008] Preferably, there are two first elastic members, which are respectively located on the opposite sides of the two connecting columns.

[0009] Preferably, the connecting column has an abutting plane adapted to abut against the first elastic member.

[0010] Preferably, after the end of the hoop belt is folded back, a first collar is formed and fixed. The connecting column is nested in the corresponding first collar. The axial direction of the connecting column is the same as the axial direction of the limiting groove, and a through hole for the connecting bolt to pass through is provided on the first collar.

[0011] Preferably, outwardly protruding stop edges are formed at both axial ends of the connecting column. The stop edges at both ends of the connecting column respectively abut against the two end portions of the first collar to form axial limitation of the connecting column.

[0012] Preferably, a protective pad is provided on the inner side of each hoop belt; clamping grooves adapted to be clamped with the side edges of the hoop belt are formed on both sides of the protective pad.

[0013] Preferably, two spaced and opposite side plates are provided on the support frame. The second elastic fastening assembly is arranged between the two side plates; the second elastic assembly includes a positioning shaft fixedly installed between the two side plates, two second elastic members sleeved on the positioning shaft, and a sleeve slidably sleeved on the positioning shaft and limited between the two second elastic members. The hoop belt is connected to the sleeve.

[0014] Preferably, a limiting ring groove is provided on the outer part of the sleeve, and a second collar adapted to be sleeved with the limiting ring groove is provided at the end of the hoop belt.

[0015] Preferably, the support frame is of an L-shaped structure. The limiting groove is arranged on the inner side of the support frame. The limiting groove is an arc groove adapted to the outer shape of the hydrogen storage tank, and its radian is greater than 180 degrees.

[0016] The positive effects of the utility model are as follows: the fixing strap structure in the utility model is optimized to better meet the adaptive fixing requirements of the hydrogen storage tank; specifically, through the coordinated design of the limit groove and the strap unit on the support frame, the requirement of 2% expansion of the hydrogen storage tank can be met. Specifically, the strap unit includes at least two hoops connected in sequence by a first elastic fastening component. This multi-hoop design not only enhances the flexibility and adaptability of the strap unit, so that it can better fit the surface of the hydrogen storage tank and ensure a more uniform and stable fixing effect, but also provides telescopic elasticity in the length direction through the first elastic fastening component, so that the strap unit can adapt to the expansion and contraction of the hydrogen storage tank, avoiding the strap being too tight or too loose due to expansion; at the same time, the hoop is connected to the support frame through the second elastic fastening component, so that the strap unit can move axially along the limit groove, and cooperate with the elastic telescopic function of the first elastic fastening component to further disperse the stress generated during the expansion and contraction of the hydrogen storage tank, prevent stress concentration, and avoid damage to the hydrogen storage tank or the strap structure; in addition, the support frame forms a stable support for the hydrogen storage tank, combined with the multi-hoop design and elastic fastening components of the strap unit, significantly improves the overall strength and reliability of the structure, makes the strap not easy to deform or fail under dynamic conditions, and finally achieves a significant improvement in the safety and service life of the hydrogen storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. Similar elements or parts in the drawings are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn according to the actual scale.

[0018] Figure 1 This is a front view of the fixing strap in the utility model;

[0019] Figure 2 for Figure 1 A perspective view of the fixing strap shown;

[0020] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0022] Figure 5 It is an exploded view of the strap unit in the utility model;

[0023] Figure 6 It is a structural schematic diagram of the first elastic fastening component in the utility model;

[0024] Figure 7Schematic diagram of the structure of the second elastic fastening component in the present utility model;

[0025] Figure 8 Schematic diagram of the structure of the fixed strap in use in the present utility model.

[0026] The reference numerals shown in the figure are: 1, support frame; 11, limit groove; 12, side plate; 2, strap unit; 21, first elastic fastening component; 211, connecting column; 2111, abutting plane; 2112, retaining edge; 212, connecting bolt; 213, locking nut; 214, first elastic member; 22, hoop strap; 220, second sleeve ring; 221, first sleeve ring; 222, through hole; 23, second elastic fastening component; 231, positioning shaft; 232, second elastic member; 233, sleeve; 234, limit ring groove; 24, protection pad; 3, hydrogen storage tank. Specific embodiments

[0027] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0028] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0029] The fixed strap capable of adapting to the expansion of the hydrogen storage tank in the embodiment of the present utility model has a structure as Figures 1 to 8As shown, the fixing strap can meet the 2% expansion of the hydrogen storage tank, and includes a support frame 1 and a strap unit 2. The support frame 1 is provided with a limiting groove 11, and both ends of the strap unit 2 are connected to the support frame 1. When in use, the hydrogen storage tank 3 is placed in the limiting groove 11 and fixed by the strap unit 2, and the support frame 1 forms a stable support for the hydrogen storage tank 3; it is further arranged that the strap unit 2 includes at least two hoops 22 connected in sequence by a first elastic fastening component 21, and the first elastic fastening component 21 is configured to make the strap unit 2 have telescopic elasticity in the length direction, and the hoop 22 is connected to the support frame 1 by a second elastic fastening component 23, and the second elastic fastening component 23 is configured to enable the strap unit 2 to move axially along the limiting groove 11. The fixed strap structure can effectively meet the requirement of 2% expansion of the hydrogen storage tank through the coordinated design of the limit groove 11 on the support frame 1 and the strap unit 2; specifically, the strap unit 2 includes at least two hoops 22 connected in sequence through the first elastic fastening component 21. This multi-hoop design not only enhances the flexibility and adaptability of the strap unit, so that it can better fit the surface of the hydrogen storage tank 3 and ensure a more uniform and stable fixing effect, but also provides telescopic elasticity in the length direction through the first elastic fastening component 21, so that the strap unit 2 can adapt to the expansion and contraction of the hydrogen storage tank 3 to avoid the strap being too tight or too loose due to expansion; at the same time The hoop 22 is connected to the support frame 1 through the second elastic fastening component 23, so that the strap unit 2 can move axially along the limiting groove 11, and cooperate with the elastic telescopic function of the first elastic fastening component 21 to further disperse the stress generated during the expansion and contraction of the hydrogen storage tank 3, prevent stress concentration, and avoid damage to the hydrogen storage tank 3 or the strap structure; in addition, the support frame 1 forms a stable support for the hydrogen storage tank 3, combined with the multi-strap design and elastic fastening components of the strap unit 2, which significantly improves the overall strength and reliability of the structure, making the strap less likely to deform or fail under dynamic conditions, and ultimately achieving a significant improvement in the safety and service life of the hydrogen storage tank.

[0030] See also Figure 3 and Figure 6As shown, the first elastic fastening assembly 21 includes a connecting column 211, a connecting bolt 212, a locking nut 213, and a first elastic member 214; there are two connecting columns 211 which are respectively connected to two hoop bands 22, the connecting bolt 212 passes through the connecting column 211 and the first elastic member 214 and is connected to the locking nut 213; in this solution, by passing the connecting bolt 212 through the connecting column 211 and the first elastic member 214 and fixing it with the locking nut 213, this structure is not only convenient for installation and adjustment, but also provides elastic telescopic ability in the length direction through the first elastic member 214, which can effectively absorb and disperse the stress generated during the expansion and contraction of the hydrogen storage tank 3, enabling the binding unit 2 to adapt to the expansion and contraction of the hydrogen storage tank 3 and avoiding the binding being too tight or too loose due to the expansion of the hydrogen storage tank 3; in addition, the design of the connecting bolt 212 and the locking nut 213 enables the fastening force of the first elastic fastening assembly 21 to be adjustable, and the tightness of the binding can be flexibly adjusted according to actual needs, further improving the applicability and reliability of the binding unit. Preferably, the first elastic member 214 can be a helical compression spring.

[0031] Preferably, there are two first elastic members 214, which are respectively located on the opposite sides of the two connecting columns 211; through the combined action of the two first elastic members 214, a relatively uniform elastic force distribution can be provided, so as to better absorb and disperse the stress generated during the expansion and contraction of the hydrogen storage tank 3.

[0032] Preferably, the connecting column 211 has an abutting plane 2111 adapted to abut against the first elastic member 214; the abutting plane 2111 provides a more stable support for the first elastic member 214, so as to ensure that the elastic force of the first elastic member 214 can be stably transmitted.

[0033] See Figure 3 As shown, after the end of the hoop band 22 is folded back and fixed (by welding or riveting), a first collar 221 is formed, the connecting column 211 is nested in the corresponding first collar 221, the axial direction of the connecting column 211 is the same as the axial direction of the limiting groove 11, and a through hole 222 for the connecting bolt 212 to pass through is provided on the first collar 221; in this way, the rapid assembly of the connecting column 211 and the hoop band 22 can be realized, and the force can be evenly transmitted to the hoop band 22 through the collar.

[0034] See Figure 3 and Figure 6The connecting column 211 is provided with outwardly protruding retaining edges 2112 at both axial ends. The retaining edges 2112 at both ends of the connecting column 211 respectively abut against the two ends of the first sleeve ring 221 to form an axial limit for the connecting column 211. This can prevent the connecting column 211 from sliding axially and ensure the stability of the installation of the connecting column 211; at the same time, it can prevent the connecting bolt 212 from scratching the edge of the through hole 222 due to the axial movement of the connecting column 211 relative to the hoop 22.

[0035] See also Figure 5 As shown, the band 22 is usually made of metal (such as stainless steel). In order to prevent the band 22 from directly contacting the hydrogen storage tank 3 and causing friction damage to the hydrogen storage tank 3, a protective pad 24 is preferably provided on the inner side of each band 22. After the strap unit is tightened, the protective pad 24 is isolated between the hydrogen storage tank 3 and the band 22. The protective pad 24 is preferably made of rubber. In order to prevent the protective pad 24 from detaching from the band 22, grooves are formed on both sides of the protective pad 24 to engage with the side edges of the band 22.

[0036] Combination Figure 2 , Figure 4 and Figure 7 The support frame 1 is provided with two spaced and opposite side plates 12, and the second elastic fastening component 23 is arranged between the two side plates 12; the second elastic component 23 includes a positioning shaft 231 positioned and installed between the two side plates 12, two second elastic members 232 sleeved on the positioning shaft 231, and a sleeve 233 slidably sleeved on the positioning shaft 231 and limited between the two second elastic members 232, and the hoop 22 is connected to the sleeve 233; in normal state, the sleeve 233 is located in the middle of the positioning shaft 231 under the elastic force of the two second elastic members 232, and the second elastic member 232 on the corresponding side is compressed and deformed when the sleeve 233 slides axially along the positioning shaft 231. This design realizes bidirectional elastic buffering through the second elastic member 232, effectively absorbs external impact or vibration, reduces stress transmission to the support frame 1, and enhances overall stability; the slidable characteristics of the sleeve 233 enable the hoop 22 to automatically adjust its position according to load changes, ensuring that the tension is always in the best state and avoiding being too tight or too loose.

[0037] like Figure 7 As shown, a limiting ring groove 234 is provided on the outside of the sleeve 233, and the end of the hoop 22 has a second ring 220 that is sleeved with the limiting ring groove 234; the limiting ring groove 234 can limit the hoop 22, thereby strengthening the connection between the hoop 22 and the sleeve 233; specifically, the limiting ring groove 234 enables the second ring 220 to be firmly sleeved on the sleeve 233, preventing the hoop 22 from sliding or detaching when subjected to force, thereby ensuring the stability of the connection.

[0038] likeFigure 1 and Figure 2 As shown in Figure 2 , the support frame 1 is of an L-shaped structure. The limiting groove 11 is arranged inside the support frame 1. The limiting groove 11 is an arc groove adapted to the outer shape of the hydrogen storage tank 3, and its radian is greater than 180 degrees. In this way, after the hydrogen storage tank 3 is placed in the limiting groove 11, a more reliable limiting effect can be formed on the hydrogen storage tank 3, thereby ensuring the reliability of the installation of the hydrogen storage tank 3.

[0039] For those of ordinary skill in the art, based on the above description, other different forms of changes or modifications can be made. It is not necessary and impossible to list all the implementation manners here. And these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A fixed strap capable of adapting to the expansion of a hydrogen storage tank, comprising a support frame (1) and a strap unit (2). A limit groove (11) is provided on the support frame (1), and both ends of the strap unit (2) are connected to the support frame (1); it is characterized in that, The strap unit (2) includes at least two hoop straps (22) sequentially connected by a first elastic fastening component (21). The first elastic fastening component (21) is configured to endow the strap unit (2) with elastic elongation in the length direction. The hoop strap (22) is connected to the support frame (1) by a second elastic fastening component (23). The second elastic fastening component (23) is configured to enable the strap unit (2) to axially move along the limiting groove (11).

2. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 1, wherein The first elastic fastening component (21) includes a connecting column (211), a connecting bolt (212), a locking nut (213), and a first elastic member (214). There are two connecting columns (211) which are respectively connected to two hoop straps (22). The connecting bolt (212) passes through the connecting column (211) and the first elastic member (214) and is connected to the locking nut (213).

3. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 2, wherein There are two first elastic members (214), which are respectively located on the opposite sides of the two connecting columns (211).

4. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 3, characterized in that, The connecting column (211) has an abutting plane (2111) adapted to abut against the first elastic member (214).

5. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 2, characterized in that, After the end of the hoop strap (22) is folded back, a first collar (221) is formed and fixed. The connecting column (211) is nested in the corresponding first collar (221). The axial direction of the connecting column (211) is the same as the axial direction of the limiting groove (11). A through hole (222) for the connecting bolt (212) to pass through is provided on the first collar (221).

6. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 5, characterized in that, Convex stop edges (2112) are formed at both axial ends of the connecting column (211). The stop edges (2112) at both ends of the connecting column (211) respectively abut against both ends of the first collar (221) to form axial limitation of the connecting column (211).

7. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 1, characterized in that, A protective pad (24) is provided on the inner side of each hoop strap (22). Card slots for clamping with the side edges of the hoop strap (22) are formed on both sides of the protective pad (24).

8. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 1, characterized in that Two spaced and opposite side plates (12) are provided on the support frame (1). The second elastic fastening component (23) is arranged between the two side plates (12). The second elastic fastening component (23) includes a positioning shaft (231) positioned and installed between the two side plates (12), two second elastic members (232) sleeved on the positioning shaft (231), and a sleeve (233) slidably sleeved on the positioning shaft (231) and limited between the two second elastic members (232). The hoop strap (22) is connected to the sleeve (233).

9. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 8, characterized in that, A limiting ring groove (234) is provided on the outside of the sleeve (233). The end of the hoop strap (22) has a second collar (220) which forms a socket joint with the limiting ring groove (234).

10. The fixed strap capable of adapting to the expansion of the hydrogen storage tank according to claim 1, characterized in that, The support frame (1) is of an L-shaped structure. The limiting groove (11) is provided on the inner side of the support frame (1). The limiting groove (11) is an arc groove adapted to the outer shape of the hydrogen storage tank (3), and its radian is greater than 180 degrees.

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