Hydrogen pipeline material safety detection device

Abstract

The utility model relates to the technical field of pipeline detection, in particular to a hydrogen pipeline material safety detection device which comprises two connecting semi-rings, connecting mechanisms are arranged on the two connecting semi-rings, and the two connecting semi-rings are fixed to the outer side of a pipeline in a butt joint mode through the connecting mechanisms. The detection mechanism is arranged on the inner side of the connecting semi-ring and comprises a coupling positioning assembly and an acoustic emission instrument, the coupling positioning assembly is arranged on the connecting semi-ring, and the acoustic emission instrument is arranged in the detection cylinder on the inner side of the connecting semi-ring; the detection mechanism can be matched with the moving mechanism to complete dynamic detection on the hydrogen pipeline; through the cleaning mechanism, dust and impurities on the surface of the pipeline can be cleaned by using a brush in the moving process of the connecting ring, and secondary cleaning is performed on the pipeline by cooperating with the fan to blow airflow and using an exhaust outlet, so that attachment of the dust and impurities is reduced, and the situation that the dust and impurities are attached to the pipeline to affect the detection effect is avoided; the problem that an existing hydrogen embrittlement detection method cannot carry out dynamic nondestructive detection on the hydrogen pipeline is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline detection, and particularly relates to a safety detection device for the material of a hydrogen pipeline. Background Art

[0002] Hydrogen (English name: Hydrogen, chemical formula: H2) is the lightest gas known in the world. Its density is very small, only 1 / 14 of that of air. That is, under standard atmospheric pressure and 0 °C, the density of hydrogen is 0.0899 g / L. As a clean fuel, the main current methods for producing hydrogen include: the reaction of active metals with acids, electrolysis of water, water gas method, decomposition of water by highly efficient catalysts, and decomposition of methane at high temperatures, etc. No matter which of the above methods is used for production, or when hydrogen is used as a fuel, workers must use pipelines to transport hydrogen.

[0003] Hydrogen is a simple substance formed by hydrogen elements. Under normal temperature and pressure, hydrogen is a colorless, odorless, extremely flammable and insoluble in water gas. Hydrogen molecules can enter the crystal lattices of many metals, causing the phenomenon of "hydrogen embrittlement". Therefore, special materials are required for hydrogen storage tanks and pipelines, and detection equipment needs to be frequently used to detect hydrogen transmission pipelines during use, to avoid damage to the pipeline material during long-term use, which affects the transmission of hydrogen. After retrieval, a Chinese patent document with the patent number CN106596729B discloses a method for monitoring the fatigue crack growth and hydrogen embrittlement evaluation of 2.25Cr-1Mo steel based on acoustic emission. In this method, by monitoring and analyzing the acoustic emission signal characteristics during the fatigue crack growth process of 2.25Cr-1Mo steel, the acoustic emission signals of the original state material and the hydrogen embrittlement state material are compared and analyzed, and the hydrogen embrittlement condition of the material is evaluated by the proportion of signals above 60 dB. However, since this method is a static detection, it cannot perform dynamic detection on the installed hydrogen pipelines during use. A Chinese patent document with the patent number CN113237756B discloses a hydrogen embrittlement detector for the production of high-strength steel. This detector can realize the hydrogen embrittlement detection of high-strength steel through the settings of the detector main body shell, instrument support legs, and drive motor. However, since this detection device is a destructive detection, it is not suitable for non-destructive detection of installed hydrogen pipelines during use.

[0004] Therefore, there is an urgent need to design a detection device dedicated to the safety of the material of hydrogen pipelines to solve the problems existing in the above-mentioned prior art. Summary of the Utility Model

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present utility model provides a safety detection device for the material of hydrogen pipelines, which has the advantages of being able to perform non-destructive testing on hydrogen pipelines, having high detection accuracy for pipeline materials, being easy to install and disassemble, etc., and solves the problem that the existing hydrogen embrittlement detection methods cannot perform dynamic non-destructive testing on hydrogen pipelines.

[0007] (II) Technical Solution

[0008] To achieve the above-mentioned purpose of performing non-destructive testing on hydrogen pipelines and having high detection accuracy for pipeline materials at the same time, the present utility model provides the following technical solution:

[0009] A safety detection device for the material of hydrogen pipelines, comprising: two connecting half-rings, on both of which connecting mechanisms are provided, and the two connecting half-rings are butt-jointed and fixed on the outer side of the hydrogen pipeline through the connecting mechanisms; a detection mechanism, arranged on the inner side of the connecting half-rings, including a coupling and positioning component and an acoustic emission instrument, the coupling and positioning component is arranged on the connecting half-rings, and the acoustic emission instrument is arranged in a detection cylinder on the inner side of the connecting half-rings.

[0010] As a preferred solution of the safety detection device for the material of hydrogen pipelines of the present utility model:

[0011] The coupling and positioning component includes an air pump arranged on the outer side of any one of the connecting half-rings, and the exhaust end of the air pump is communicated with an air cavity arranged on the connecting half-rings; a coupling airbag arranged at the outer opening of the detection cylinder and communicated with the air cavity through a bronchus.

[0012] Based on the above technical features: it is possible to inflate the air cavity by using the air pump, and the gas in the air cavity enters the coupling airbag through the bronchus at the corresponding position to inflate the coupling airbag, so that it is tightly coupled to the outer side of the hydrogen pipeline, and the acoustic emission instrument can complete the accurate detection of the hydrogen embrittlement condition of the hydrogen pipeline through the coupling and fidelity function of the coupling airbag.

[0013] As a preferred solution of the safety detection device for the material of hydrogen pipelines of the present utility model:

[0014] A moving mechanism is further arranged on the connecting half-rings, the moving mechanism includes a motor arranged on the surface of the connecting half-rings; a roller rotatably arranged on the connecting half-rings, connected to the output shaft of the motor and in contact with the outer wall of the hydrogen pipeline.

[0015] Based on the above technical features: by driving the roller to rotate by the motor, the connecting ring slides along the surface of the pipeline, and the detection mechanism can be used to perform dynamic detection on the surface material of the hydrogen pipeline.

[0016] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: A cleaning mechanism is further provided on the connecting half-ring. The cleaning mechanism includes a mounting shell fixedly connected to the surface of the connecting half-ring. A filter screen is detachably provided on the top of the mounting shell. A blower is provided inside the mounting shell. A communication cavity is formed inside the connecting half-ring, and through holes communicating with the mounting shell are formed on the inner wall of the communication cavity.

[0017] Based on the above technical features: The blower can introduce air flow into the interior of the mounting shell, and the filter screen can filter the air flow.

[0018] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: Uniformly distributed and obliquely arranged exhaust holes are formed on the inner edge of the connecting half-ring, and the other end openings of the exhaust holes communicate with the communication cavity.

[0019] Based on the above technical features: The filtered air flow is discharged through the exhaust holes and acts on the surface cleaning of the hydrogen pipeline.

[0020] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: Uniformly distributed brushes are fixedly connected to the inner wall of the connecting half-ring, and the exhaust holes are located between the brushes and the detection cylinder.

[0021] Based on the above technical features: During the movement of the device, the brushes can be used to clean the impurities and dust on the surface of the pipeline, and the ejected air flow can cooperate to enhance the cleaning effect.

[0022] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: The connecting mechanism includes two mounting plates respectively fixedly connected to the outer edges of the two connecting half-rings. A jack is formed on the surface of the upper mounting plate, and a chute communicating with the jack is formed on the surface of the upper mounting plate. The width of the opening of the chute is smaller than the aperture of the jack.

[0023] Based on the above technical features: The cooperation of the two mounting plates is used for the docking between the two connecting half-rings to form a connecting ring for surrounding the surface of the pipeline.

[0024] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: A limiting rod is slidably connected to the inner wall of the upper mounting plate. One end of the limiting rod penetrates through the mounting plate and extends into the interior of the chute. The other end of the limiting rod penetrates through the mounting plate and is fixedly connected with a pulling block. An inclined surface is provided at the end of the limiting rod away from the pulling block.

[0025] Based on the above technical features: By squeezing the inclined surface of the limiting rod, the limiting rod can be driven to contract into the interior of the mounting plate.

[0026] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: A spring is fixedly connected to the surface of the limiting rod, and the other end of the spring is fixedly connected to the inner wall of the mounting plate.

[0027] Based on the above technical features: During the process of the limiting rod contracting into the mounting plate, the spring can be compressed, and when the compression stops, the spring can drive the limiting rod to reset.

[0028] As a preferred embodiment of a hydrogen pipeline material safety detection device of the present utility model: A connecting rod is fixedly connected to the top of the lower mounting plate, a limiting block is fixedly connected to the top of the connecting rod, the diameter of the connecting rod is equal to the width of the slot of the sliding groove, and the diameter of the limiting block is equal to the aperture of the jack.

[0029] Based on the above technical features: The limiting block can pass through the jack and the connecting rod can be inserted into the inside of the jack. By moving the connecting rod along the inner wall of the sliding groove, the limiting block can be moved above the sliding groove, thereby cooperating with the sliding groove to avoid the situation of the limiting block sliding down and falling off.

[0030] (III) Beneficial effects

[0031] Compared with the prior art, the present utility model provides a hydrogen pipeline material safety detection device, which has the following beneficial effects:

[0032] 1. Through the setting of the connecting semi-ring of the present device, an installation framework dedicated to the hydrogen embrittlement detection of hydrogen pipelines is formed, and dynamic detection of hydrogen pipelines can be realized under the drive of the moving mechanism;

[0033] 2. By setting the cleaning mechanism, during the process of the installed connecting ring moving driven by the motor to drive the rollers, the dust and impurities on the surface of the pipeline can be initially cleaned by the brush, and the air blower is started to blow the air flow to perform secondary cleaning on the surface of the pipeline through the air outlet, effectively reducing the adhesion of dust and impurities and avoiding the influence of dust and impurities adhering to the pipeline on the detection effect of the detection cylinder;

[0034] 3. The mutual cooperation of the limiting rod, spring, connecting rod, limiting block, jack and sliding groove can enable the rapid connection between the two mounting plates, and further realize the rapid installation and disassembly between the two connecting semi-rings, with simple operation;

[0035] 4. Through the setting of the detection mechanism, the non-destructive detection of hydrogen pipelines can be completed by using an acoustic emission instrument, and at the same time, through the coupling and fidelity effect of the coupling and positioning component, the acoustic emission instrument can complete the precise detection of the hydrogen embrittlement condition of hydrogen pipelines, with the advantages of convenient disassembly, high detection accuracy and the ability to realize non-destructive dynamic detection. Description of the drawings

[0036] Figure 1Schematic diagram of the structure of the hydrogen pipeline material safety detection device of the present utility model;

[0037] Figure 2 Separation diagram of the hydrogen pipeline material safety detection device of the present utility model;

[0038] Figure 3 Connection diagram of the cleaning mechanism and the connecting half-ring of the present utility model;

[0039] Figure 4 Schematic diagram of the structure of the connecting mechanism of the present utility model;

[0040] Figure 5 Partial enlarged view of the A position of the hydrogen pipeline material safety detection device of the present utility model.

[0041] In the figure: 1. Connecting half-ring; 101. Detection cylinder; 102. Roller; 103. Motor; 104. Air cavity; 2. Cleaning mechanism; 201. Installation shell; 202. Fan; 203. Through hole; 204. Communication cavity; 205. Brush; 206. Exhaust hole; 3. Connecting mechanism; 301. Installation plate; 302. Jack; 303. Chute; 304. Limiting rod; 305. Spring; 306. Connecting rod; 307. Limiting block; 4. Detection mechanism; 401. Air pump; 402. Coupling airbag; 403. Bronchus; 404. Control valve; 405. Acoustic emission instrument. Specific implementation manners

[0042] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0043] Embodiment 1: Please refer to Figures 1-5 As shown, the present utility model provides a solution:

[0044] A hydrogen pipeline material safety detection device, comprising:

[0045] Two connecting half-rings 1, connection mechanisms 3 are symmetrically arranged on the outer edges of the two connecting half-rings 1, and the two connecting half-rings 1 are butted through the connection mechanisms 3 to form a connection ring and are fixed on the outer side of the hydrogen pipeline;

[0046] A moving mechanism, which is arranged on the connecting half-ring 1 and is used in cooperation with the outer side wall of the hydrogen pipeline to drive the device to move on the outer side of the hydrogen pipeline;

[0047] Cleaning mechanism 2, which is arranged on the inner edge of the connecting half-ring 1 and is used for cleaning impurities on the surface of the hydrogen pipeline;

[0048] Detection mechanism 4, which is arranged inside the connecting half-ring 1 and is used for detecting hydrogen embrittlement of the hydrogen pipeline;

[0049] Specifically: Through the connecting mechanism 3, two connecting half-rings 1 are butted to form a connecting ring, so that the hydrogen pipeline to be detected is located inside the connecting ring, and the moving mechanism is started to act, so that the connecting ring slides along the surface of the hydrogen pipeline. During this process, the detection mechanism 4 can dynamically detect the surface material of the hydrogen pipeline.

[0050] Example 2: Please refer to Figure 1 、 Figure 2 As shown, the moving mechanism includes:

[0051] Motor 103, which is arranged on the surface of the connecting half-ring 1;

[0052] Roller 102, which is rotatably installed on the connecting half-ring 1 and is fixedly connected to the output shaft of the motor 103. By driving the roller 102 to rotate through the motor 103, the device moves along the length direction of the pipeline.

[0053] Specifically: By turning on the motor 103 to act, the roller 102 is driven by the motor 103 to rotate, so that the connecting ring slides along the surface of the pipeline, and the detection mechanism 4 is used to dynamically detect the surface material of the hydrogen pipeline.

[0054] As a preferred implementation, both the roller 102 and the motor 103 are products well-known to those skilled in the art, and the specifications and sizes can be selected according to needs during use.

[0055] Example 3: Please refer to Figure 1 、 Figure 2 and Figure 3 As shown, the cleaning mechanism 2 includes a mounting shell 201 fixedly connected to the surface of the connecting half-ring 1. A filter screen is detachably arranged on the top of the mounting shell 201, and a blower 202 is arranged inside the mounting shell 201; a communication cavity 204 is opened inside the connecting half-ring 1, a through hole 203 communicating with the mounting shell 201 is opened on the inner wall of the communication cavity 204, and uniformly distributed and obliquely arranged exhaust holes 206 are opened on the inner edge of the connecting half-ring 1. The other end opening of the exhaust hole 206 communicates with the communication cavity 204. Uniformly distributed brushes 205 are fixedly connected to the inner wall of the connecting half-ring 1, and the exhaust holes 206 are located between the brushes 205 and the detection cylinder 101.

[0056] Specifically, during the detection process of the movement of the connecting ring, the brush 205 can move together to clean the dust and impurities on the surface of the pipeline. At the same time, by starting the fan 202, the external air can be sucked into the interior of the installation shell 201 under the action of the fan 202. The filter screen can filter and intercept the dust and impurities in the air. The filtered air is introduced into the interior of the communication cavity 204 through the through hole 203 and further blows the dust on the surface of the pipeline under the action of the inclined exhaust holes 206. At the same time, it cooperates with the blowing brush to sweep the dust on the surface of the pipeline, effectively improving the cleaning effect and avoiding the attachment of dust and impurities on the surface of the pipeline from affecting the detection effect of the detection cylinder 101.

[0057] As a preferred embodiment, the fan 202 is a product well-known to those skilled in the art, and its specifications and sizes can be selected according to needs during use.

[0058] Example 4: Please refer to Figure 1 、 Figure 2 and Figure 4 As shown in, the connecting mechanism 3 includes two mounting plates 301 respectively fixedly connected to the outer edges of the two connecting half-rings 1.

[0059] On the surface of the upper mounting plate 301, there are jacks 302, and on the surface of the upper mounting plate 301, there is a chute 303 communicating with the jacks 302. The width of the opening of the chute 303 is smaller than the aperture of the jacks 302. Inside the inner wall of the upper mounting plate 301, there is also a sliding connection with a limiting rod 304. One end of the limiting rod 304 penetrates out of the mounting plate 301 and extends into the chute 303. The other end of the limiting rod 304 penetrates out of the mounting plate 301 and is fixedly connected with a pulling block. The end of the limiting rod 304 away from the pulling block is provided with an inclined surface. On the surface of the limiting rod 304, there is a fixedly connected spring 305, and the other end of the spring 305 is fixedly connected with the inner wall of the mounting plate 301.

[0060] On the top of the lower mounting plate 301, there is a fixedly connected connecting rod 306. On the top of the connecting rod 306, there is a fixedly connected limiting block 307. The diameter of the connecting rod 306 is equal to the width of the opening of the chute 303, and the diameter of the limiting block 307 is equal to the aperture of the jacks 302.

[0061] Specifically: During the docking process of the upper connecting semi-ring 1 and the lower connecting semi-ring 1, the limiting block 307 is passed through the jack 302 until the two mounting plates 301 are in tight contact. During this process, the connecting rod 306 can be inserted into the interior of the jack 302. At this time, the lower connecting semi-ring 1 is slid so that the connecting rod 306 can move into the interior of the chute 303. During this process, the connecting rod 306 can squeeze the inclined surface of the limiting rod 304, causing it to contract into the interior of the mounting plate 301 and compress the spring 305, thus not affecting the normal movement of the connecting rod 306. Until the entire connecting rod 306 passes through the limiting rod 304, it can drive the limiting rod 304 to reset under the action of the spring 305. At this time, the connecting rod 306 can be limited under the combined action of the chute 303 and the limiting rod 304. And due to the change in the position of the connecting rod 306, and the diameter of the limiting block 307 is greater than the slot width of the chute 303, the positions of the two mounting plates 301 can be limited to prevent detachment during use.

[0062] During disassembly, the limiting rod 304 can be contracted into the interior of the mounting plate 301 by pulling the pull block, and then disassembly can be carried out. The installation and disassembly methods are simple and convenient.

[0063] Example 5: Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 as shown, the detection mechanism 4 includes:

[0064] A coupling and positioning component, which is arranged on the connecting semi-ring 1 and is used to couple with the outer wall of the hydrogen pipeline during detection to ensure the detection effect;

[0065] An acoustic emission instrument 405, which is fixedly installed in the detection cylinder 101 on the inner side of the connecting semi-ring 1. The acoustic emission instrument 405 emits acoustic signals and processes the acoustic emission signals to detect the hydrogen embrittlement condition of the hydrogen pipeline.

[0066] As a preferred implementation scheme, the coupling and positioning component includes:

[0067] An air pump 401, which is fixedly installed on the outer side of any one of the connecting semi-rings 1, and the exhaust end of the air pump 401 is communicated with the air cavity 104 arranged on the connecting semi-ring 1;

[0068] A coupling airbag 402, which is arranged at the outer opening of the detection cylinder 101 and is communicated with the air cavity 104 through a bronchus 403. A control valve 404 is arranged on the pipeline of the bronchus 403 to control the opening and closing of the pipeline of the bronchus 403.

[0069] Specifically: during detection, first turn on the air pump 401, use the air pump 401 to inflate the air chamber 104, the gas in the air chamber 104 enters the coupling airbag 402 through the bronchus 403 at the corresponding position, inflate the coupling airbag 402, and make it tightly coupled outside the hydrogen pipeline; then turn on the acoustic emission instrument 405 for pipeline detection.

[0070] As a preferred embodiment, the acoustic emission instrument 405 is a product well-known to those skilled in the art, and its specifications and sizes can be selected according to needs during use. Its specific working principle is as shown in the patent document disclosed by the patent number CN106596729B.

[0071] When the hydrogen pipeline material safety detection device of the present utility model is in use:

[0072] First, place one of the connecting half-rings 1 above the pipeline to be detected, and under the action of the connecting mechanism 3, the other connecting half-ring 1 can be docked with the placed connecting half-ring 1 to form a connecting ring. By starting the two motors 103, the rollers 102 can be driven to rotate under the action of the motors 103, so that the connecting ring slides along the surface of the pipeline. During this process, the surface material of the pipeline can be detected by the detection cylinder 101. During the movement, the dust and impurities on the pipeline surface can be effectively cleaned by starting the fan 202 and cooperating with the brush 205, so as to avoid the dust and impurities adhering to the pipeline surface and affecting the detection effect of the detection mechanism 4.

[0073] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0074] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hydrogen pipeline material safety detection device, characterized in that: include: Two connecting half rings (1), each of the two connecting half rings (1) being provided with a connecting mechanism (3), and the two connecting half rings (1) are butt-jointed and fixed on the outside of the hydrogen pipeline via the connecting mechanism (3); The detection mechanism (4) is arranged on the inner side of the connecting half ring (1), and comprises a coupling positioning component and an acoustic emission instrument (405). The coupling positioning component is arranged on the connecting half ring (1), and the acoustic emission instrument (405) is arranged in a detection cylinder (101) on the inner side of the connecting half ring (1).

2. A hydrogen pipeline material safety detection device as claimed in claim 1, characterized in that: The coupling positioning component comprises: An air pump (401) is arranged outside any connecting half ring (1), and an exhaust end of the air pump (401) is communicated with an air cavity (104) arranged on the connecting half ring (1); The coupling air bag (402) is arranged at the outer opening of the detection tube (101) and is connected to the air cavity (104) through the bronchus (403).

3. A hydrogen pipeline material safety detection device as claimed in claim 1, characterized in that: The connecting half ring (1) is also provided with a moving mechanism, and the moving mechanism comprises: A motor (103), wherein the motor (103) is arranged on the surface of the connecting half ring (1); The roller (102) is rotatably arranged on the connecting half ring (1), connected to the output shaft of the motor (103), and in contact with the outer wall of the hydrogen pipeline.

4. A hydrogen pipeline material safety detection device as claimed in claim 1, characterized in that: The connecting half ring (1) is also provided with a cleaning mechanism (2), and the cleaning mechanism (2) comprises: A mounting shell (201) is arranged on the surface of the connecting half ring (1), and a filter screen is arranged on the top of the mounting shell (201); The fan (202) is arranged in the mounting shell (201), and the fan (202) is connected to a communication cavity (204) arranged in the connecting half ring (1) through a through hole (203), and the through hole (203) is arranged on the inner side of the mounting shell (201).

5. A hydrogen pipeline material safety detection device as claimed in claim 4, characterized in that: A plurality of evenly distributed and obliquely arranged exhaust holes (206) are provided on the inner side of the connecting half ring (1), and the other end opening of the exhaust hole (206) is connected to the connecting cavity (204).

6. A hydrogen pipeline material safety detection device as claimed in claim 4, characterized in that: The inner wall of the connecting half ring (1) is provided with evenly distributed brushes (205), and the exhaust hole (206) is located between the brush (205) and the detection cylinder (101).

7. A hydrogen pipeline material safety detection device as claimed in claim 1, characterized in that: The connecting mechanism (3) is arranged at the outer edge of the connecting half ring (1), and comprises a mounting plate (301) arranged at the outer edge of the connecting half ring (1), a plug hole (302) is provided on the upper surface of the mounting plate (301), a slide groove (303) connected to the plug hole (302) is provided on the upper surface of the mounting plate (301), and the groove width of the slide groove (303) is smaller than the aperture of the plug hole (302).

8. A hydrogen pipeline material safety detection device as claimed in claim 7, characterized in that: The inner wall of the upper mounting plate (301) is slidably connected to a limiting rod (304), one end of the limiting rod (304) passes through the mounting plate (301) and extends to the inside of the slide groove (303), the other end of the limiting rod (304) passes through the mounting plate (301) and is fixedly connected to a pull block, and an inclined surface is provided at one end of the limiting rod (304) away from the pull block.

9. A hydrogen pipeline material safety detection device as claimed in claim 8, characterized in that: A spring (305) is fixedly connected to the surface of the limiting rod (304), and the other end of the spring (305) is fixedly connected to the inner wall of the mounting plate (301).

10. A hydrogen pipeline material safety detection device as claimed in claim 9, characterized in that: A connecting rod (306) is fixedly connected to the top of the mounting plate (301) below, and a limiting block (307) is fixedly connected to the top of the connecting rod (306). The diameter of the connecting rod (306) is equal to the slot width of the slide groove (303), and the diameter of the limiting block (307) is equal to the aperture of the jack (302).

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