A device and method for nondestructive testing of interface damage of a composite hydrogen storage structure after a fire

Abstract

The application discloses a kind of composite hydrogen storage structure fire interface damage nondestructive testing device and method after, belong to post-fire detection field.A kind of composite hydrogen storage structure fire interface damage nondestructive testing device after, including base, still including fixedly arranged on base riser, riser is fixedly connected with top plate;Sliding plate, slidingly set in the bottom of top plate, the bottom of sliding plate is equipped with detection rod, the bottom of detection rod is equipped with detection head, the outer wall of detection head is also equipped with circumferentially distributed camera;Two clamping blocks, are slidingly set on base;Two clamping blocks mutually close side are slidingly set with arc plate, and sponge pad is arranged on arc plate, and buffer component is arranged between arc plate and corresponding clamping block;In the application, when clamping fixed, it has buffering effect, can avoid clamping to damage hydrogen storage structure, avoid causing interface debonding and interlayer damage, to ensure that fire original damage state, so that detection result is more accurate, can reflect real deterioration degree.

Description

Technical Field

[0001] This invention relates to the field of post-fire detection technology, and in particular to a non-destructive testing device and method for interface damage detection of composite hydrogen storage structures after a fire. Background Technology

[0002] With the rapid development of the hydrogen energy storage and transportation industry, Type III and Type IV composite high-pressure hydrogen storage structures have become core equipment in the hydrogen energy supply system. Their structural safety and remaining service performance under fire conditions are the focus of industry attention. The interface between the lining and the carbon fiber composite layer is a key mechanical and sealing weakness of the composite hydrogen storage structure. Fire thermal exposure can cause various damages such as interface debonding and interface performance degradation, which directly determine the remaining load-bearing capacity and service reliability of the structure after the fire. Therefore, accurate non-destructive testing of interface damage is the core prerequisite for carrying out post-fire safety assessment and supporting the fire-resistant optimization design of hydrogen storage containers.

[0003] Currently, the test specimen fixing method for post-fire interface damage detection has poor adaptability during use. Rigid clamping is often used for fixing. However, after the composite resin matrix is ​​exposed to heat in a fire, it carbonizes and the interfacial bonding force decreases significantly. The local extrusion stress generated by rigid clamping can easily introduce additional interfacial debonding and interlayer damage, destroying the original damage state of the fire and causing the test results to fail to reflect the true degree of deterioration.

[0004] In summary, the current lack of a dedicated non-destructive testing device for interface damage tailored to the post-fire characteristics of composite hydrogen storage structures has become a significant technical bottleneck restricting the improvement of the accuracy of fire safety assessments for composite hydrogen storage structures. Therefore, this invention is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a non-destructive testing device and method for interface damage of composite hydrogen storage structures after a fire.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A non-destructive testing device for interface damage of a composite hydrogen storage structure after a fire, comprising a base, and further comprising: A vertical plate is fixedly mounted on a base, and a top plate is fixedly connected to the vertical plate. A sliding plate is slidably mounted on the bottom of a top plate. A detection rod is provided at the bottom of the sliding plate, and a detection head is provided at the bottom of the detection rod. A circumferentially distributed camera is also provided on the outer wall of the detection head. A protective component for protecting the detection rod and the detection head is also provided at the bottom of the sliding plate. Both clamping blocks are slidably mounted on the base, and the two clamping blocks can move closer or further apart at the same time. An arc-shaped plate is slidably provided on one side of each of the two clamping blocks that are close to each other. A sponge pad is provided on the arc-shaped plate, and a buffer assembly is provided between the arc-shaped plate and the corresponding clamping block.

[0007] Preferably, a cylinder is provided on the top plate, an output rod is connected to the output end of the cylinder, a flange is connected to the end of the output rod, and the flange is fixedly connected to the top of the slide plate.

[0008] Furthermore, a limiting frame is fixedly connected to the outer wall of the skateboard, and multiple long grooves are provided on the upright plate, with the limiting frame slidably connected in the long grooves.

[0009] Furthermore, the protective assembly includes a first cylinder and a second cylinder that are slidably connected. The first cylinder is fixedly disposed at the bottom of the slide plate. In the initial state, the detection rod and the detection head are both placed inside the first cylinder and the second cylinder.

[0010] Furthermore, multiple fixing blocks are fixedly connected to the top outer wall of the second cylinder, and fixing rods are fixedly connected to the fixing blocks. The top of the fixing rod passes through the sliding plate and is fixedly connected to the bottom of the top plate. The sliding plate is provided with small holes for the fixing rods to pass through. The first cylinder is provided with a sliding groove, and the second cylinder is provided with a boss that is slidably connected in the sliding groove.

[0011] Preferably, the buffer assembly includes a guide rod fixedly mounted on the arc-shaped plate and a spring sleeved on the guide rod. The guide rod is slidably connected to the clamping block. One end of the guide rod away from the arc-shaped plate passes through the clamping block and is connected to a stop block. The two ends of the spring are respectively connected to the arc-shaped plate and the clamping block.

[0012] Furthermore, the base is provided with a placement groove and a T-slot. A threaded rod is rotatably connected in the T-slot. The two ends of the threaded rod have opposite thread directions. T-blocks are fixedly provided at the bottom of the two clamping blocks. The T-blocks are slidably connected in the T-slot, and the two T-blocks are respectively threaded to the two ends of the threaded rod.

[0013] Furthermore, a box is fixedly connected to the base, and a rotating shaft is rotatably connected inside the box. Both the rotating shaft and the outer wall of the threaded rod are provided with pulleys, and the two pulleys are connected by a belt.

[0014] Furthermore, a crossbar is fixedly connected to the outer wall of the skateboard, and a mounting plate connected to the skateboard is fixedly connected to the crossbar. A mounting groove is provided at the end of the crossbar away from the mounting plate, and a vertical rod is installed in the mounting groove. A rack is provided at the bottom of the vertical rod, and a gear that meshes with the rack is provided on the rotating shaft.

[0015] A non-destructive testing method for interface damage in a composite hydrogen storage structure after a fire, comprising the following steps: Step 1: Place the hydrogen storage structure to be tested between the two curved plates; Step 2: Control the slide to move downwards, so that the detection rod and detection head located at the bottom of the slide can extend out from inside the protective component and continue to move downwards to insert into the hydrogen storage structure to be tested. Then, the detection head and camera are used to detect the inside of the hydrogen storage structure. Step 3: As the slide moves downward, the two clamping blocks will move closer to each other, which will in turn bring the two arc-shaped plates closer together, thus clamping the hydrogen storage structure with the two arc-shaped plates. Step four: The sponge pads provided can protect the hydrogen storage structure from being crushed. At the same time, the buffer components can create a buffer space between the two clamping blocks and the two arc-shaped plates, further protecting the hydrogen storage structure.

[0016] Compared with the prior art, the present invention provides a non-destructive testing device and method for interface damage of composite hydrogen storage structures after a fire, which has the following beneficial effects: 1. This non-destructive testing device for interface damage after a fire of a composite hydrogen storage structure protects the hydrogen storage structure during the clamping and fixing process by using a sponge pad to prevent damage. Simultaneously, the buffer assembly creates a buffer space between the two clamping blocks and the two arc-shaped plates, further protecting the hydrogen storage structure and preventing damage that could affect the testing results. This achieves stable clamping while protecting the hydrogen storage structure, thus improving the overall testing effectiveness.

[0017] 2. The non-destructive testing device for interface damage after a fire in this composite hydrogen storage structure protects the detection rod and detection head through the first and second cylinders. In the initial state, the second cylinder encloses the detection head, preventing it from being impacted by external forces. During use, as the sliding plate moves downward, the second cylinder remains stationary under the action of the fixing rod, allowing the first cylinder to slide downward inside the second cylinder. This allows the detection rod and detection head to gradually extend out of the second cylinder and then be inserted into the hydrogen storage structure to achieve the detection effect. After the detection is completed, all parts automatically reset, restoring the protective effect.

[0018] 3. This non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure utilizes an air-coupled ultrasonic testing device. Air is the sole coupling medium, eliminating the need for liquid coupling agents and enabling entirely non-contact testing. The integrated transceiver miniature ultrasonic probe is encapsulated within an insulating shell. The probe's focal length is adapted to the curvature of the hydrogen storage structure's inner wall, allowing its overall size to be reduced to the centimeter level, enabling it to easily extend into the inner cavity through the bottle opening. Sound waves incident from the inside of the liner only need to pass through the thin liner to reach the interface, resulting in a short sound path, minimal signal attenuation, and clear echo characteristics of interface debonding. The non-contact nature completely avoids secondary damage to the weak interface after a fire caused by contact pressure, while also preventing contamination of the liner surface. It perfectly matches the low-disturbance testing requirements and is universally compatible with Type III metal liner and Type IV polymer liner structures.

[0019] The parts not involved in this device are the same as or can be implemented using existing technologies. When clamping and fixing the hydrogen storage structure in this invention, it can have a certain buffering effect, thereby avoiding damage to the hydrogen storage structure, avoiding interface debonding and interlayer damage, thus ensuring the original damage state of the fire, making the detection results more accurate and able to reflect the true degree of deterioration. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure proposed in this invention. Figure 2 This is a schematic diagram of the back of a non-destructive testing device for interface damage after a fire, based on a composite hydrogen storage structure proposed in this invention. Figure 3 This is a cross-sectional schematic diagram of the housing in the non-destructive testing device for interface damage after a fire of a composite hydrogen storage structure proposed in this invention. Figure 4 This invention proposes a non-destructive testing device for interface damage of a composite hydrogen storage structure after a fire. Figure 3 An enlarged schematic diagram of part A in the middle; Figure 5 This is a schematic diagram of the base in a non-destructive testing device for interface damage after a fire of a composite hydrogen storage structure proposed in this invention. Figure 6 This is a schematic diagram of the sliding plate in the non-destructive testing device for interface damage after fire of a composite hydrogen storage structure proposed in this invention. Figure 7 This is a schematic diagram of the first and second cylinders in a non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure proposed in this invention. Figure 8 This invention proposes a non-destructive testing device for interface damage of a composite hydrogen storage structure after a fire. Figure 7 An enlarged schematic diagram of part A in the middle; Figure 9This is a schematic diagram of the detection rod and camera in a non-destructive testing device A for interface damage after a fire in a composite hydrogen storage structure proposed in this invention.

[0021] In the diagram: 1. Base; 101. Vertical plate; 102. Long groove; 103. Top plate; 104. Placement groove; 105. T-slot; 2. Cylinder; 201. Output rod; 202. Flange; 203. Slide plate; 204. Limiting bracket; 3. Detection rod; 301. Detection head; 302. Camera; 303. First cylinder; 304. Second cylinder; 305. Slide groove; 306. Boss; 30 7. Fixing block; 308. Fixing rod; 4. Threaded rod; 401. T-block; 402. Clamping block; 403. Guide rod; 404. Stop block; 405. Spring; 406. Arc plate; 407. Sponge pad; 5. Horizontal bar; 501. Mounting plate; 502. Mounting groove; 503. Vertical bar; 504. Rack; 505. Box body; 506. Rotating shaft; 507. Pulley; 508. Gear. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Example 1:

[0025] Reference Figures 1-9 A non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure includes a base 1 and a vertical plate 101 fixedly mounted on the base 1. A top plate 103 is fixedly connected to the vertical plate 101. A sliding plate 203 is slidably mounted on the bottom of the top plate 103. A detection rod 3 is provided at the bottom of the sliding plate 203. A detection head 301 is provided at the bottom of the detection rod 3. A circumferentially distributed camera 302 is also provided on the outer wall of the detection head 301. A protective component for protecting the detection rod 3 and the detection head 301 is also provided at the bottom of the sliding plate 203. Two clamping blocks 402 are slidably mounted on the base 1, and the two clamping blocks 402 can move closer or further away at the same time. An arc-shaped plate 406 is slidably mounted on the side of the two clamping blocks 402 that are close to each other. A sponge pad 407 is provided on the arc-shaped plate 406. A buffer component is provided between the arc-shaped plate 406 and the corresponding clamping block 402.

[0026] In this embodiment, during use, the hydrogen storage structure to be tested, such as the liner, is first placed between two arc-shaped plates 406. Then, the sliding plate 203 is controlled to move downwards, causing the detection rod 3 and detection head 301 located at the bottom of the sliding plate 203 to extend from inside the protective assembly and continuously move downwards to insert into the hydrogen storage structure to be tested. Then, the internal structure of the hydrogen storage structure is tested through the detection head 301 and the camera 302. Specifically, the detection head 301 adopts an air-coupled ultrasonic testing device, using air as the only coupling medium, without the need for liquid coupling agent, throughout the entire process. Non-contact testing utilizes a miniature ultrasonic probe that integrates transceiver functions, encapsulated within an insulating housing. The probe's focal length is adapted to the curvature of the hydrogen storage structure's inner wall, allowing its overall size to be reduced to the centimeter level. It can be easily inserted into the inner cavity through the bottle opening. Sound waves incident from the inside of the liner only need to pass through the thin liner to reach the interface, resulting in a short sound path, minimal signal attenuation, and clear echo characteristics of interface debonding. The non-contact nature completely avoids secondary damage to the weak interface after fire caused by contact pressure, while also preventing contamination of the liner surface. It perfectly matches the requirements for low-disturbance testing and is universally compatible with Type III metal liner and Type IV polymer liner structures.

[0027] Simultaneously, as the sliding plate 203 moves downward, the two clamping blocks 402 move closer together, thereby bringing the two arc-shaped plates 406 closer together. This allows the two arc-shaped plates 406 to clamp and fix the hydrogen storage structure. During the clamping and fixing process, the sponge pad 407 protects the hydrogen storage structure and prevents it from being damaged. At the same time, the buffer component provides a reserved buffer space between the two clamping blocks 402 and the two arc-shaped plates 406, further protecting the hydrogen storage structure and preventing damage that could affect the detection results.

[0028] Reference Figures 1-3 A cylinder 2 is installed on the top plate 103. The output end of the cylinder 2 is connected to an output rod 201. The end of the output rod 201 is connected to a flange 202. The flange 202 is fixedly connected to the top of the slide plate 203.

[0029] Reference Figures 1-3 and Figures 5-6 A limit frame 204 is fixedly connected to the outer wall of the slide plate 203, and multiple long grooves 102 are provided on the upright plate 101. The limit frame 204 is slidably connected in the long grooves 102.

[0030] In this embodiment, the cylinder 2 is activated, which drives the output rod 201 at the output end to extend, thereby driving the slide plate 203 to move downward. The limiting frame 204 provided on the slide plate 203 can slide within the upright plate 101 and the long groove 102, thereby improving the stability of the movement of the slide plate 203. Furthermore, a flange 202 is provided at the end of the output rod 201, which can achieve a tight connection with the slide plate 203, thereby facilitating the movement of the slide plate 203 by the cylinder 2.

[0031] Reference Figures 6-9 The protective assembly includes a first cylinder 303 and a second cylinder 304 that are slidably connected. The first cylinder 303 is fixedly installed at the bottom of the slide plate 203. In the initial state, the detection rod 3 and the detection head 301 are both placed inside the first cylinder 303 and the second cylinder 304.

[0032] Reference Figures 6-9 Multiple fixing blocks 307 are fixedly connected to the top outer wall of the second cylinder 304. Fixing rods 308 are fixedly connected to the fixing blocks 307. The top of the fixing rods 308 passes through the slide plate 203 and is fixedly connected to the bottom of the top plate 103. The slide plate 203 is provided with small holes for the fixing rods 308 to pass through. The first cylinder 303 is provided with a sliding groove 305. The second cylinder 304 is provided with a boss 306 that is slidably connected in the sliding groove 305.

[0033] In this embodiment, after the cylinder 2 is activated, the slide plate 203 moves downward. Since the fixing rod 308 is fixed on the top plate 103 and the top plate 103 does not move, the second cylinder 304 remains stationary. When the slide plate 203 moves downward, it drives the first cylinder 303 to move downward, causing it to slide on the inner wall of the second cylinder 304. At the same time, the detection rod 3 and the detection head 301 connected to the bottom of the slide plate 203 move out of the second cylinder 304 and are inserted into the hydrogen storage structure. The detection effect is achieved through the detection head 301. The camera 302 is circumferentially distributed, which can realize circumferential scanning and taking pictures, further improving the detection effect.

[0034] Furthermore, a groove 305 is provided on the first cylinder 303. During sliding connection, the boss 306 on the second cylinder 304 will slide in the groove 305, thereby improving the sliding effect between the first cylinder 303 and the second cylinder 304 and making it more convenient to use. A small hole is also provided on the slide plate 203, which allows the fixing rod 308 to pass through easily without interference. When the slide plate 203 moves upward and resets, the first cylinder 303 and the second cylinder 304 can cooperate again to form a protective effect, improving the protection of the detection head 301.

[0035] Example 2:

[0036] Reference Figures 1-9A non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure includes a base 1 and a vertical plate 101 fixedly mounted on the base 1. A top plate 103 is fixedly connected to the vertical plate 101. A sliding plate 203 is slidably mounted on the bottom of the top plate 103. A detection rod 3 is provided at the bottom of the sliding plate 203. A detection head 301 is provided at the bottom of the detection rod 3. A circumferentially distributed camera 302 is also provided on the outer wall of the detection head 301. A protective component for protecting the detection rod 3 and the detection head 301 is also provided at the bottom of the sliding plate 203. Two clamping blocks 402 are slidably mounted on the base 1, and the two clamping blocks 402 can move closer or further away at the same time. An arc-shaped plate 406 is slidably mounted on the side of the two clamping blocks 402 that are close to each other. A sponge pad 407 is provided on the arc-shaped plate 406. A buffer component is provided between the arc-shaped plate 406 and the corresponding clamping block 402.

[0037] Reference Figures 1-3 A cylinder 2 is installed on the top plate 103. The output end of the cylinder 2 is connected to an output rod 201. The end of the output rod 201 is connected to a flange 202. The flange 202 is fixedly connected to the top of the slide plate 203.

[0038] Reference Figures 1-3 and Figure 5 The buffer assembly includes a guide rod 403 fixedly mounted on the arc plate 406 and a spring 405 sleeved on the guide rod 403. The guide rod 403 is slidably connected to the clamping block 402. One end of the guide rod 403 away from the arc plate 406 passes through the clamping block 402 and is connected to a stop block 404. The two ends of the spring 405 are respectively connected to the arc plate 406 and the clamping block 402.

[0039] Reference Figures 1-3 and Figure 5 The base 1 is provided with a placement groove 104 and a T-shaped groove 105. A threaded rod 4 is rotatably connected in the T-shaped groove 105. The two ends of the threaded rod 4 have opposite threads. T-shaped blocks 401 are fixedly provided at the bottom of the two clamping blocks 402. The T-shaped blocks 401 are slidably connected in the T-shaped groove 105, and the two T-shaped blocks 401 are respectively threaded to the two ends of the threaded rod 4.

[0040] Reference Figures 1-5 A box 505 is fixedly connected to the base 1. A rotating shaft 506 is rotatably connected inside the box 505. Both the rotating shaft 506 and the outer wall of the threaded rod 4 are equipped with pulleys 507. The two pulleys 507 are connected by a belt.

[0041] Reference Figures 1-5A crossbar 5 is fixedly connected to the outer wall of the slide plate 203. A mounting plate 501 connected to the slide plate 203 is fixedly connected to the crossbar 5. A mounting groove 502 is provided at the end of the crossbar 5 away from the mounting plate 501. A vertical rod 503 is installed in the mounting groove 502. A rack 504 is provided at the bottom of the vertical rod 503. A gear 508 that meshes with the rack 504 is provided on the rotating shaft 506.

[0042] In this embodiment, when the cylinder 2 is activated, on the one hand, the cylinder 2 will drive the detection rod 3 and the detection head 301 to move downward, so that they can extend into the hydrogen storage structure to achieve the detection effect, and at the same time, the detection rod 3 and the detection head 301 can be extended out of the protective assembly for use; on the other hand, the sliding plate 203 will also drive the horizontal bar 5 connected to its outer wall to move downward, and the horizontal bar 5 will drive the vertical bar 503 connected to its outer wall to move downward, thereby driving the bottom rack 504 to mesh with the gear 508 on the rotating shaft 506, thereby driving the gear 508 to rotate, so that the gear 508... 08 drives the rotating shaft 506 to rotate synchronously, and then drives the threaded rod 4 to rotate synchronously through the pulley 507 and belt. When the threaded rod 4 rotates, it will be threadedly connected to the T-blocks 401 at both ends. Since the threads at both ends of the threaded rod 4 rotate in opposite directions, the two T-blocks 401 can move in opposite directions. When the slide plate 203 moves downward, it will cause the two T-blocks 401 to move closer to each other, thereby driving the two clamping blocks 402 to move closer to each other, and then causing the two arc plates 406 to move closer and clamp the hydrogen storage structure, thereby achieving the positioning effect.

[0043] During the movement of the two clamping blocks 402, the spring 405 on the buffer assembly is compressed, thereby pushing the arc plate 406 to move under the action of the spring 405. This causes the sponge pad 407 on the arc plate 406 to come into contact with the hydrogen storage structure. As the clamping force of the two arc plates 406 increases, the hydrogen storage structure can be fixed. The sponge pad 407 can protect the hydrogen storage structure and prevent it from being damaged during clamping. The spring 405 provides a certain buffering effect between the clamping blocks 402 and the arc plate 406, preventing rigid clamping from damaging the hydrogen storage structure and affecting the detection effect. The guide rod 403 can limit the movement of the arc plate 406, making its movement more stable. The stop block 404 can prevent the guide rod 403 from falling off the clamping block 402, improving the overall use effect.

[0044] During installation, first attach the mounting plate 501 to the outer wall of the slide plate 203 and then fix it with bolts. Insert the vertical rod 503 into the mounting groove 502 and then fix the vertical rod 503 with bolts. The bottom of the vertical rod 503 extends into the box 505. The rack 504 on the outer wall meshes with the gear 508 to facilitate the overall transmission effect. The T-block 401 can slide within the T-groove 105, and the two form a limiting effect. When the threaded rod 4 rotates, it can improve the stability of movement.

[0045] Example 3:

[0046] A non-destructive testing method for interface damage of a composite hydrogen storage structure after a fire is disclosed. The method involves placing the hydrogen storage structure to be tested between two arc-shaped plates 406; controlling the sliding plate 203 to move downwards, causing the detection rod 3 and detection head 301 located at the bottom of the sliding plate 203 to extend from inside the protective assembly and continuously move downwards to insert into the hydrogen storage structure to be tested; then, the detection head 301 and camera 302 are used to detect the interior of the hydrogen storage structure; as the sliding plate 203 moves downwards, the two clamping blocks 402 move closer together, thereby causing the two arc-shaped plates 406 to move closer together, thus clamping the hydrogen storage structure; a sponge pad 407 is provided to protect the hydrogen storage structure from damage, and under the action of the buffer assembly, a reserved buffer space exists between the two clamping blocks 402 and the two arc-shaped plates 406, further protecting the hydrogen storage structure.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure, comprising a base (1), characterized in that, Also includes: A vertical plate (101) is fixedly installed on the base (1), and a top plate (103) is fixedly connected to the vertical plate (101). A sliding plate (203) is slidably disposed at the bottom of the top plate (103). A detection rod (3) is provided at the bottom of the sliding plate (203). A detection head (301) is provided at the bottom of the detection rod (3). A circumferentially distributed camera (302) is also provided on the outer wall of the detection head (301). A protective component for protecting the detection rod (3) and the detection head (301) is also provided at the bottom of the sliding plate (203). Both clamping blocks (402) are slidably disposed on the base (1), and the two clamping blocks (402) can move closer or further away at the same time; An arc-shaped plate (406) is slidably provided on one side of each of the two clamping blocks (402) that are close to each other. A sponge pad (407) is provided on the arc-shaped plate (406), and a buffer assembly is provided between the arc-shaped plate (406) and the corresponding clamping block (402).

2. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 1, characterized in that, A cylinder (2) is provided on the top plate (103). The output end of the cylinder (2) is connected to an output rod (201). The end of the output rod (201) is connected to a flange (202). The flange (202) is fixedly connected to the top of the slide plate (203).

3. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 2, characterized in that, A limiting frame (204) is fixedly connected to the outer wall of the sliding plate (203), and a plurality of long grooves (102) are provided on the upright plate (101). The limiting frame (204) is slidably connected in the long grooves (102).

4. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 2, characterized in that, The protective assembly includes a first cylinder (303) and a second cylinder (304) that are slidably connected. The first cylinder (303) is fixedly installed at the bottom of the slide plate (203). In the initial state, the detection rod (3) and the detection head (301) are both placed inside the first cylinder (303) and the second cylinder (304).

5. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 4, characterized in that, Multiple fixing blocks (307) are fixedly connected to the top outer wall of the second cylinder (304). A fixing rod (308) is fixedly connected to the fixing block (307). The top of the fixing rod (308) passes through the sliding plate (203) and is fixedly connected to the bottom of the top plate (103). The sliding plate (203) is provided with a small hole for the fixing rod (308) to pass through. The first cylinder (303) is provided with a sliding groove (305). The second cylinder (304) is provided with a boss (306) that is slidably connected in the sliding groove (305).

6. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 2, characterized in that, The buffer assembly includes a guide rod (403) fixedly mounted on the arc plate (406) and a spring (405) sleeved on the guide rod (403). The guide rod (403) is slidably connected to the clamping block (402). One end of the guide rod (403) away from the arc plate (406) passes through the clamping block (402) and is connected to a stop block (404). The two ends of the spring (405) are respectively connected to the arc plate (406) and the clamping block (402).

7. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 6, characterized in that, The base (1) is provided with a placement groove (104) and a T-slot (105). A threaded rod (4) is rotatably connected in the T-slot (105). The two ends of the threaded rod (4) have opposite thread directions. The bottom of the two clamping blocks (402) is fixedly provided with T-blocks (401). The T-blocks (401) are slidably connected in the T-slot (105), and the two T-blocks (401) are respectively threaded to the two ends of the threaded rod (4).

8. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 7, characterized in that, A box (505) is fixedly connected to the base (1), and a rotating shaft (506) is rotatably connected inside the box (505). Both the rotating shaft (506) and the outer wall of the threaded rod (4) are provided with pulleys (507), and the two pulleys (507) are connected by a belt.

9. The non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure according to claim 8, characterized in that, A crossbar (5) is fixedly connected to the outer wall of the slide plate (203). A mounting plate (501) connected to the slide plate (203) is fixedly connected to the crossbar (5). A mounting groove (502) is provided at one end of the crossbar (5) away from the mounting plate (501). A vertical rod (503) is installed in the mounting groove (502). A rack (504) is provided at the bottom of the vertical rod (503). A gear (508) meshing with the rack (504) is provided on the rotating shaft (506).

10. A method for non-destructive testing of interface damage after a fire in a composite hydrogen storage structure, comprising the non-destructive testing device for interface damage after a fire in a composite hydrogen storage structure as described in any one of claims 1-9, characterized in that, Follow these steps: Step 1: Place the hydrogen storage structure to be tested between two arc-shaped plates (406); Step 2: Control the slide plate (203) to move downwards, so that the detection rod (3) and detection head (301) located at the bottom of the slide plate (203) extend out from inside the protective assembly and continue to move downwards to insert into the hydrogen storage structure to be tested. Then, the detection head (301) and camera (302) are used to detect the inside of the hydrogen storage structure. Step 3: As the sliding plate (203) moves downward, the two clamping blocks (402) will move closer to each other, thereby bringing the two arc-shaped plates (406) closer together, so that the two arc-shaped plates (406) clamp the hydrogen storage structure. Step four: The sponge pad (407) can protect the hydrogen storage structure and prevent it from being damaged. At the same time, under the action of the buffer component, there is a reserved buffer space between the two clamping blocks (402) and the two arc plates (406), which further protects the hydrogen storage structure.

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