Leakage detection quantity experiment platform and experiment method based on ultrasonic waves

Abstract

The invention discloses a leakage detection quantity experiment platform and experiment method based on ultrasonic waves, and the platform comprises a deformation layer (19), a conductive part (27) and a detection sealing layer (25) which are arranged from inside to outside in the radial direction of a cable pipe (14), and also comprises an ultrasonic signal transmitting unit (29). The ultrasonic signal transmitting unit (29) is connected to the deformation layer (19), and at least part of the ultrasonic signal transmitting unit (29) is located on the side, close to the conductive part (27), of the deformation layer (19); the air pressure in the cable pipe (14) changes, the pressure sensor (18) detects that the cable pipe (14) leaks air, and the deformation layer (19) deforms; a signal transmitting column (290) is inserted into a jack (271), an ultrasonic signal transmitting unit (29) is electrified and conducted, and a signal is transmitted to prompt a leakage point; the gas leakage condition can be accurately confirmed through mutual verification between the pressure sensor (18) and the ultrasonic signal transmitting unit (29).

Description

Technical Field

[0001] The invention relates to nondestructive quantitative testing of air tightness of important areas of a nuclear power plant or a nuclear project, and in particular to an ultrasonic-based leakage detection experimental platform and an experimental method. Background Art

[0002] The quantitative non-destructive measurement method of the air tightness of important areas and their overall or local leakage values ​​is one of the key issues of concern in the industry. When a leak occurs locally in the air tightness area, the fluid pressure therein will change. At the same time, a turbulent jet is formed at the leak point. The turbulent jet rubs against the leak hole, thereby generating propagating infrasound and ultrasonic waves.

[0003] The ultrasonic-based leakage detection technology for important areas (whole or local) mainly uses ultrasonic waves to measure the overall or local leakage of holes and door boundaries in important areas related to nuclear power plants or nuclear projects. Holes and airtight doors are the main components of the boundaries of important nuclear areas. The clearer the leakage situation of each local boundary is studied and the more accurate the test is, the more helpful it is to ensure the overall sealing of important areas. Ultrasonic-based leakage detection of pipelines is an important key basic technology to move non-destructive quantitative testing methods for important areas from laboratories to engineering practice applications, and from macro testing to micro research. This helps to explain the causes and mechanisms of leakage in important areas from a micro perspective and fundamentally propose countermeasures. At present, in the field of non-destructive quantitative testing of airtightness in important areas of nuclear power plants or nuclear projects, there is no experimental platform for leak detection based on leakage mechanisms and phenomena using ultrasonic methods.

[0004] The existing patent document CN207081525U discloses a leakage measurement device for isolation valves in nuclear power plants, which is used to conduct leakage tests on transmission pipelines that penetrate the reactor containment building. The device is centered on a control unit, and has a built-in solenoid valve, temperature and gas volume measurement module in the box. The measurement process and calculation process are directly processed by the control unit, and the measurement results are displayed in real time on the screen. It is compact and portable, and the operation is also very simple, which shortens the test time. During the leakage test, the temperature measurement module directly contacts the gas to be detected in the pipeline, avoiding the leakage volume correction error caused by the gas temperature error, and the temperature and gas volume measurement module has high measurement accuracy, which can reduce the test error. However, the problem of building an experimental platform for leakage detection using ultrasound based on leakage mechanisms and phenomena has not been solved.

[0005] The existing patent document CN102226484B discloses a method for detecting the medium leakage flow at the stem seal of a nuclear-grade valve, and an online leakage monitoring device for the stem seal of a nuclear-grade valve, including a leakage collection and drainage device and a leakage flow detection device. The leakage liquid of the valve stem flows into the leakage measurement tube in the leakage flow detection device through the leakage collection and drainage device, and the intelligent circuit board in the intelligent signal processing circuit board measures the time required for the valve leakage liquid to reach the upper part from the bottom of the leakage measurement tube through the liquid level detection sensor in the leakage measurement tube, thereby calculating the leakage speed of the leakage liquid, and transmitting the information to the control room remotely, but the problem of building an experimental platform for leakage detection based on the leakage mechanism and phenomenon using ultrasonic waves is not solved.

[0006] In summary, the above two existing patents do not solve the problem of building an experimental platform for leak detection using ultrasound based on leakage mechanisms and phenomena. Summary of the invention

[0007] Based on the above technical problems, the present invention proposes an ultrasonic-based leakage detection quantity and method to solve the problem of building an experimental platform for leakage detection using ultrasonic methods based on leakage mechanisms and phenomena in the prior art.

[0008] In order to achieve the above-mentioned purpose, the present invention proposes an ultrasonic-based leakage detection experimental platform.

[0009] An ultrasonic-based leakage detection experimental platform, comprising:

[0010] The experimental platform comprises a deformation layer, a conductive member and a detection sealing layer arranged from inside to outside along the radial direction of the cable tube, and the experimental platform also comprises an ultrasonic signal transmitting unit, which is connected to the deformation layer and at least a part of which is located on a side of the deformation layer close to the conductive member;

[0011] When the cable tube leaks, the deformation layer may be radially deformed, so that the ultrasonic signal emitting unit and the conductive member are changed from an off state to a on state.

[0012] Furthermore, the ultrasonic signal emitting unit comprises a signal emitting column, which is a part of the ultrasonic signal emitting unit, and a plurality of the signal emitting columns are arranged along the axial direction of the cable tube.

[0013] Furthermore, the signal emitting column further includes a conductive protrusion, and the conductive protrusion is arranged on both sides of the end of the signal emitting column.

[0014] Furthermore, the conductive member includes a socket, and the socket is arranged at a position in the conductive member that matches the signal emitting column.

[0015] Furthermore, the conductive member further includes an insulating layer, and at least a portion of the insulating layer is disposed inside the conductive member.

[0016] Furthermore, the conductive member further includes a metal layer, and at least a portion of the metal layer is disposed inside the conductive member.

[0017] Furthermore, it also includes that at least part of the insulating layer and at least part of the metal layer are sequentially spaced inside the conductive member through multiple layers.

[0018] Furthermore, the deformation layer includes a mounting layer, and the mounting layer is placed inside the deformation layer.

[0019] Furthermore, the installation layer comprises an ultrasonic ejector pin, the ultrasonic ejector pin is placed inside the installation layer, and a plurality of the ultrasonic ejector pins are arranged along the axial direction of the cable tube;

[0020] The ultrasonic ejector needle comprises a hollow hole and a needle rod, and the needle rod is inserted into the hollow hole.

[0021] Furthermore, the deformation layer also includes a liquid storage layer, which is arranged on the top of the installation layer, and the liquid storage layer contains liquid that flows out when the ultrasonic ejector pin is inserted.

[0022] Furthermore, the deformation layer also includes a pipeline, and the pipeline is arranged at the bottom of the installation layer.

[0023] Furthermore, the pipeline also includes a liquid detection sensor, and the liquid detection sensor is arranged inside the pipeline.

[0024] Furthermore, the pipeline also includes a sponge, which is arranged inside the pipeline, and a plurality of sponges are arranged axially along the cable tube, and each sponge is placed at the bottom of one of the ultrasonic ejector pins.

[0025] Furthermore, it comprises a reinforcing layer, which is arranged between the conductive member and the deformable layer and is used to limit the up and down movement of the ultrasonic signal emitting unit.

[0026] Furthermore, the cable tube comprises a pressure sensor, and the pressure sensor is placed inside the cable tube.

[0027] In order to achieve the above object, the present invention proposes an ultrasonic-based leakage detection experimental method.

[0028] An ultrasonic-based leak detection experimental method, comprising:

[0029] The air pressure in the cable tube changes, the pressure sensor detects air leakage in the cable tube, and the deformation layer deforms;

[0030] The signal transmitting column is inserted into the jack, the ultrasonic signal transmitting unit is powered on, and the transmitting signal indicates the leakage point;

[0031] The gas leakage can be accurately confirmed through mutual verification between the pressure sensor and the ultrasonic signal transmitting unit.

[0032] Furthermore, the ultrasonic signal transmitting unit is powered on and transmits a signal to display the leakage point, including:

[0033] After the deformation layer is deformed, the ultrasonic ejector pin at the corresponding deformation position is also lifted up and inserted into the liquid storage layer, and the liquid flows into the sponge along the ultrasonic ejector pin.

[0034] Furthermore, the ultrasonic signal transmitting unit is powered on and transmits a signal to display the leakage point, including:

[0035] The specific leakage position of the cable pipe is determined by the liquid detection sensor detecting the liquid stored in the sponge.

[0036] Furthermore, the ultrasonic signal transmitting unit is powered on and transmits a signal to indicate the leakage point, and further includes:

[0037] The metal layers are stacked in sequence to contact with the conductive protrusions in sequence, so that the ultrasonic signal transmitting unit is turned on to send signals for multiple times. The degree of gas leakage is determined according to the number of times the ultrasonic signal transmitting unit sends signals.

[0038] Furthermore, the ultrasonic signal transmitting unit is powered on and transmits a signal to indicate the leakage point, and further includes:

[0039] The leakage section is determined by the information of the signals sent by two adjacent ultrasonic signal transmitting units.

[0040] Based on the above technical solution, the present invention has at least the following beneficial effects:

[0041] 1. The present invention can meet the requirements of different working conditions. The first layer of detection based on ultrasonic judgment can determine the cable pipe with gas leakage, and then the specific leakage section can be further detected through the ultrasonic signal transmitting unit. Through the coordinated work of the pressure sensor and the ultrasonic signal transmitting unit, the specific location of the gas leakage can be accurately detected. When a leak occurs in the cable pipe, the pressure sensor first detects the change in air pressure, and then the deformation layer deforms, driving the signal transmitter to be inserted into the jack, thereby sending a signal to indicate the leak point.

[0042] 2. The experimental platform can automatically process data information and realize automatic, timely and accurate measurement of gas leakage. Through the design of the device structure, gas leakage can be measured without human intervention, which improves the detection efficiency and accuracy. The air pressure changes in the cable tube are monitored in real time, which can detect leakage early and achieve early warning.

[0043] 3. Applying the cable tube with detection seal layer to the actual gas transportation device can ensure the safety of gas transportation and protect the safety of working environment and ecological environment. By timely detecting and repairing leaks, potential safety accidents and environmental pollution can be prevented.

[0044] 4. The experimental platform adopts an innovative structural design, including ultrasonic channels, concrete walls, deformation layers, sealing layers, etc. These designs not only simulate the actual working environment, but also provide a reliable testing environment, making leakage detection closer to actual operating conditions and improving the reliability and practicality of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 A cross-sectional view of a leakage detection test platform according to an embodiment is shown;

[0047] Figure 2 A cross-sectional view of the intermediate structure of a cable tube and a sealing layer according to an embodiment is shown;

[0048] Figure 3 A cross-sectional view of a mounting layer structure according to an embodiment is shown.

[0049] The above-mentioned drawings include the following reference numerals:

[0050] 10. Experimental platform; 11. Mounting frame; 12. Mounting seat; 13. Concrete wall; 14. Cable pipe; 15. Sealing cover; 16. Mounting panel; 17. Inlet valve; 18. Pressure sensor; 19. Deformation layer; 20. Mounting layer; 21. Ultrasonic ejector pin; 22. Liquid storage layer; 23. Sponge; 24. Pipeline; 25. Sealing layer; 26. Deformation gap groove; 27. Conductive member; 28. Reinforcement layer; 29. ​​Ultrasonic signal transmitting unit;

[0051] 121, through slot;

[0052] 211, hollow hole; 212, needle bar;

[0053] 241. Liquid detection sensor;

[0054] 271, jack; 271, insulation layer; 273, metal layer;

[0055] 290. Signal transmitting column; 291. Conductive protrusion. DETAILED DESCRIPTION

[0056] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0057] The present invention is further described in detail below in conjunction with specific embodiments, and these embodiments cannot be understood as limiting the scope of protection claimed by the present invention. The term "including" when used indicates the existence of a feature, but does not exclude the existence or addition of one or more other features; the orientation or position relationship indicated by the terms "lateral", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0058] In the description, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0059] Example

[0060] The present invention proposes an ultrasonic leakage detection experimental platform, combined with Figure 1 and Figure 2 As shown, it includes a deformation layer 19, a conductive member 27 and a detection sealing layer 25 arranged from inside to outside along the radial direction of the cable tube 14. The experimental platform also includes an ultrasonic signal transmitting unit 29, which is connected to the deformation layer 19 and at least a part of which is located on a side of the deformation layer 19 close to the conductive member 27.

[0061] When the cable tube 14 leaks, the deformation layer 19 may be radially deformed, so that the ultrasonic signal emitting unit 29 and the conductive member 27 change from a disconnected state to a connected state.

[0062] Combination Figure 1 and Figure 2 As shown, the experimental platform 10 includes: a mounting frame 11 and a mounting seat 12, and the mounting frame 11 is mounted on the mounting seat 12. An ultrasonic through groove 121 is formed in the mounting frame 11, and a concrete wall 13 is inserted in the through groove 121. The concrete wall 13 is prefabricated with concrete and steel bars to simulate the burial scene of the cable tube 14. An installation groove 131 is formed in the concrete wall 13, and a cable tube 14 for transporting gas is arranged in the installation groove 131. The mounting frame 11 is provided with a plugging cover 15 and a mounting panel 16 for sealing the through groove 121 at the ports at both ends of the through groove 121, and the mounting panel 16 is provided with ultrasonic air inlet valves 17 corresponding to the ultrasonic through groove 121, and the air outlet of the air inlet valve 17 faces the end of the cable tube 14 in the corresponding through groove 121.

[0063] In a specific implementation, a pressure sensor 18 is provided in the cable tube 14 to detect changes in internal air pressure. When gas leakage occurs in the cable tube 14, the pressure sensor 18 will detect the pressure change, and thus it can be determined that the corresponding cable tube 14 has gas leakage according to the pressure change.

[0064] Furthermore, a detection sealing layer 25 is filled between the cable tube 14 and the groove wall of the installation groove 131 to seal the cable tube 14, and the leakage point in the cable tube 14 is accurately detected. The detection sealing layer 25 includes: a deformation layer 19, and the deformation layer 19 is used to be lifted up by gas and deformed when leaking. A sealing layer 25 is sleeved on the outer periphery of the deformation layer 19 to seal the outer periphery of the cable tube 14. A conductive member 27 is embedded and installed between the sealing layer 25 and the deformation layer 19. A deformation gap groove 26 is formed between the deformation layer 19 and the sealing layer 25 along the extension direction of the cable tube 14, and the deformation gap groove 26 is provided with an ultrasonic signal emitting unit 29 in a straight line direction. The conductive member 27 is provided with a jack 271 at a position corresponding to the ultrasonic signal emitting unit 29, and the jack 271 is used for the corresponding ultrasonic signal emitting unit 29 to be inserted when the deformation layer 19 is deformed and lifted up, so that the ultrasonic signal emitting unit 29 is turned on. An insulating layer 272 is provided on the conductive part 27 facing the ultrasonic signal emitting unit 29 for resisting the ultrasonic signal emitting unit 29 to limit the up and down movement of the ultrasonic signal emitting unit 29. The insulating layer 272 can guide the ultrasonic signal emitting unit 29 to be inserted into the jack 271 when the deformation layer 19 is deformed. When the deformation layer 19 is not deformed, the insulating layer 272 can also block the ultrasonic signal emitting unit 29 from contacting the metal part, so that the ultrasonic signal emitting unit 29 is electrically disconnected.

[0065] Furthermore, the deformation gap groove 26 further includes a reinforcing layer 28 between the conductive member 27 and the deformation layer 19, which is used to limit the up and down movement of the ultrasonic signal emitting unit 29. The insertion stroke of the ultrasonic signal emitting unit 29 can be set according to actual needs. A smaller stroke setting can make the detection more sensitive, so that a signal can be sent in time after the cable tube 14 leaks.

[0066] Preferably, a gap is formed between the reinforcing layer 28 and the conductive member 27 to reduce the resistance to the movement of the ultrasonic signal emitting unit 29 .

[0067] Preferably, retractable and elastic conductive protrusions 291 are respectively arranged on both sides of the end of the signal transmitting column 290 of the ultrasonic signal transmitting unit 29, and the outer surfaces of the two conductive protrusions 291 are arranged as flat contact surfaces for fitting the insulating layer 272 and the hole wall of the plug hole 271. The outer surface of the conductive protrusion 291 is an arc-shaped circumferential surface matching the hole opening of the plug hole 271. The arc-shaped circumferential surface can guide the conductive protrusion 291 to contract, so that the conductive protrusion 291 can press the conductive part 27, thereby improving the reliability of the ultrasonic signal transmitting unit 29 to maintain conduction.

[0068] Furthermore, if Figure 2 The conductive part 27 shown includes a metal layer 273 inside. The metal layers 273 are stacked in sequence in the vertical direction to contact the ultrasonic signal emitting units 29 in sequence. The same ultrasonic signal emitting unit 29 is used to transmit signals multiple times, so that the degree of gas leakage is judged according to the number of times the ultrasonic signal emitting unit 29 sends signals. The metal layers 273 are arranged in parallel and an insulating layer 272 is provided between two adjacent metal layers 273.

[0069] Preferably, the insertion stroke of the signal transmitting column 290 is set to be greater than the conduction stroke of the ultrasonic signal transmitting unit 29 .

[0070] Furthermore, if Figure 2 The deformation layer 19 is provided with an installation layer 20, and the installation layer 20 and the ultrasonic signal emitting unit 29 are located in the same vertical plane and vertically correspond to each other. After the deformation layer 19 is deformed, the ultrasonic ejector pin 21 corresponding to the deformation position is lifted up and inserted into the liquid storage layer 22, and the liquid in the liquid storage layer 22 flows into the sponge 23 along the ultrasonic ejector pin 21. When the ultrasonic signal emitting unit 29 detects a leak, the liquid detection sensor 241 in the pipe 24 detects whether there is liquid in the corresponding sponge 23, thereby determining the specific leak point of the cable tube 14.

[0071] Furthermore, if Figure 3The ultrasonic ejector pin 21 shown is a hollow structure including a hollow hole 211, in which a needle rod 212 for puncturing the liquid storage layer 22 is inserted, and a hollow gap for liquid to flow in is formed between the needle rod 212 and the wall of the hollow hole 211 of the ultrasonic ejector pin 21, so that the liquid in the liquid storage layer 22 can flow into the sponge 23 along the needle rod 212.

[0072] Preferably, the pipe 24 is made of hard plastic to facilitate the insertion of the liquid detection sensor, and the deformable layer 19 is made of soft rubber, which has good sealing performance and is easy to deform.

[0073] In order to achieve the above object, the present invention also proposes an ultrasonic-based leakage detection experimental method, using the experimental platform described above, comprising the following steps:

[0074] The air pressure in the cable tube 14 changes, the pressure sensor 18 detects that the cable tube 14 is leaking, and the deformation layer 19 is deformed.

[0075] The signal transmitting column 290 is inserted into the jack 271, and the ultrasonic signal transmitting unit 29 is powered on and transmits a signal to indicate the leakage point.

[0076] The gas leakage situation can be accurately confirmed through the mutual verification between the pressure sensor 18 and the ultrasonic signal transmitting unit 29.

[0077] Furthermore, the ultrasonic signal transmitting unit 29 is powered on and transmits a signal to display the leakage point, including:

[0078] After the deformation layer 19 is deformed, the ultrasonic ejector pins 21 at the positions corresponding to the deformation are also lifted up and inserted into the liquid storage layer 22 , and the liquid flows into the sponge 23 along the ultrasonic ejector pins 21 .

[0079] Furthermore, the ultrasonic signal transmitting unit 29 is powered on and transmits a signal to display the leakage point, including:

[0080] The specific leakage position of the cable tube 14 is determined by the liquid detection sensor 241 detecting the liquid stored in the sponge 23 .

[0081] Furthermore, the ultrasonic signal transmitting unit 29 is powered on and transmits a signal to indicate the leakage point, and further includes:

[0082] The metal layers 273 are stacked in sequence to contact the conductive protrusions 291 in sequence, so that the ultrasonic signal transmitting unit 29 is turned on to send signals multiple times. The degree of gas leakage is determined according to the number of times the ultrasonic signal transmitting unit 29 sends signals.

[0083] Furthermore, the ultrasonic signal transmitting unit 29 is powered on and transmits a signal to indicate the leakage point, and further includes:

[0084] The leakage section is determined by the information of the signals sent by two adjacent ultrasonic signal transmitting units 29 .

[0085] In summary, it can be seen from the above description that the above embodiments of the present invention achieve at least the following technical effects:

[0086] 1. The present invention can meet the requirements of different working conditions. The first layer of detection based on ultrasonic judgment can determine the cable pipe with gas leakage, and then the specific leakage section can be further detected through the ultrasonic signal transmitting unit. Through the coordinated work of the pressure sensor and the ultrasonic signal transmitting unit, the specific location of the gas leakage can be accurately detected. When a leak occurs in the cable pipe, the pressure sensor first detects the change in air pressure, and then the deformation layer deforms, driving the signal transmitter to be inserted into the jack, thereby sending a signal to indicate the leak point.

[0087] 2. The experimental platform can automatically process data information and realize automatic, timely and accurate measurement of gas leakage. Through the design of the device structure, gas leakage can be measured without human intervention, which improves the detection efficiency and accuracy. The air pressure changes in the cable tube are monitored in real time, which can detect leakage early and achieve early warning.

[0088] 3. Applying the cable tube with detection seal layer to the actual gas transportation device can ensure the safety of gas transportation and protect the safety of working environment and ecological environment. By timely detecting and repairing leaks, potential safety accidents and environmental pollution can be prevented.

[0089] 4. The experimental platform adopts an innovative structural design, including ultrasonic channels, concrete walls, deformation layers, sealing layers, etc. These designs not only simulate the actual working environment, but also provide a reliable testing environment, making leakage detection closer to actual operating conditions and improving the reliability and practicality of the test results.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0091] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0092] It should be noted that, in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. An ultrasonic-based leakage detection experimental platform for measuring the leakage of a cable tube (14), characterized in that: The experimental platform comprises a deformation layer (19), a conductive member (27) and a detection sealing layer (25) arranged from inside to outside along the radial direction of the cable tube (14), and the experimental platform also comprises an ultrasonic signal transmitting unit (29), wherein the ultrasonic signal transmitting unit (29) is connected to the deformation layer (19) and at least a part of the deformation layer (19) is located on a side close to the conductive member (27); When the cable tube (14) leaks, the deformation layer (19) may undergo radial deformation, so that the signal transmitting unit (29) and the conductive element (27) change from an off state to an on state.

2. The experimental platform according to claim 1, characterized in that: The ultrasonic signal transmitting unit (29) comprises a signal transmitting column (290), The signal emitting column (290) is a part of the ultrasonic signal emitting unit (29), and a plurality of the signal emitting columns (290) are arranged along the axial direction of the cable tube (14).

3. The experimental platform according to claim 2, characterized in that: The signal emitting column (290) further includes a conductive protrusion (291). The conductive protrusions (291) are arranged on both sides of the end of the signal emitting column (290).

4. The experimental platform according to claim 2, characterized in that: The conductive member (27) comprises a socket (271), The insertion hole (271) is arranged at a position in the conductive member (27) that matches the signal transmitting column (290).

5. The experimental platform according to claim 1, characterized in that: The conductive member (27) further includes an insulating layer (272). At least a portion of the insulating layer (272) is disposed inside the conductive member (27).

6. The experimental platform according to claim 5, characterized in that: The conductive member (27) further includes a metal layer (273). At least a portion of the metal layer (273) is disposed inside the conductive member (27).

7. The experimental platform according to claim 6, characterized in that: Also includes, At least part of the insulating layer (272) and at least part of the metal layer (273) are sequentially arranged in layers and spaced apart from each other inside the conductive member (27).

8. The experimental platform according to claim 1, characterized in that: The deformation layer (19) comprises a mounting layer (20), The mounting layer (20) is placed inside the deformation layer (19).

9. The experimental platform according to claim 8, characterized in that: The mounting layer (20) includes an ultrasonic ejector pin (21). The ultrasonic ejector pin (21) is placed inside the installation layer (20), and a plurality of the ultrasonic ejector pins (21) are arranged along the axial direction of the cable tube (14); The ultrasonic ejector needle (21) comprises a hollow hole (211) and a needle rod (212), and the needle rod (212) is inserted into the hollow hole (211).

10. The experimental platform according to claim 9, characterized in that: The deformation layer (19) further comprises a liquid storage layer (22), The liquid storage layer (22) is arranged on the top of the installation layer (20), and the liquid storage layer (22) contains liquid that flows out when the ultrasonic ejector pin (21) is inserted.

11. The experimental platform according to claim 9, characterized in that: The deformation layer (19) further comprises a pipeline (24), The pipeline (24) is arranged at the bottom of the installation layer (20).

12. The experimental platform according to claim 11, characterized in that: The pipeline (24) further includes a liquid detection sensor (241), The liquid detection sensor (241) is arranged inside the pipeline (24).

13. The experimental platform according to claim 11, characterized in that: The pipeline (24) also includes a sponge (23), The sponge (23) is arranged inside the pipe (24), and a plurality of sponges (23) are arranged axially along the cable tube (14), and each sponge (23) is placed at the bottom of one of the ultrasonic ejector pins (21).

14. The experimental platform according to claim 1, characterized in that: comprising a reinforcement layer (28), The reinforcing layer (28) is arranged between the conductive member (27) and the deformable layer (19) and is used to limit the up and down movement of the ultrasonic signal emitting unit (29).

15. The experimental platform according to claim 1, characterized in that: The cable (14) includes a pressure sensor (18), The pressure sensor (18) is placed inside the cable (14).

16. An ultrasonic leak detection experimental method, characterized in that: include: The air pressure in the cable tube (14) changes, the pressure sensor (18) detects air leakage in the cable tube (14), and the deformation layer (19) deforms; The signal transmitting column (290) is inserted into the jack (271), and the ultrasonic signal transmitting unit (29) is powered on to transmit a signal to indicate the leakage point; The gas leakage situation can be accurately confirmed through mutual verification between the pressure sensor (18) and the ultrasonic signal transmitting unit (29).

17. The method according to claim 16, characterized in that: The ultrasonic signal transmitting unit (29) is powered on and transmits a signal to display the leakage point, including: After the deformation layer (19) is deformed, the ultrasonic ejector pins (21) at the positions corresponding to the deformation are also lifted up and inserted into the liquid storage layer (22), and the liquid flows into the sponge (23) along the ultrasonic ejector pins (21).

18. The method according to claim 16, characterized in that: The ultrasonic signal transmitting unit (29) is powered on and transmits a signal to display the leakage point, and further comprises: The specific leakage position of the cable tube (14) is determined by detecting the liquid-storing sponge (23) through the liquid detection sensor (241).

19. The method according to claim 16, characterized in that: The ultrasonic signal transmitting unit (29) is powered on to transmit a signal to indicate a leakage point, and further comprises: The metal layers (273) are stacked in sequence to contact the conductive protrusions (291) in sequence, so that the ultrasonic signal transmitting unit (29) is turned on and transmits signals multiple times, and the degree of gas leakage is determined based on the number of times the ultrasonic signal transmitting unit (29) transmits signals.

20. The method according to claim 16, characterized in that: The ultrasonic signal transmitting unit (29) is powered on to transmit a signal to indicate a leakage point, and further comprises: The leakage section is determined by information of signals sent by two adjacent ultrasonic signal transmitting units (29).

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