Acoustic imaging holder telemetering device applied to hydrogen refueling station hydrogen leakage detection

Abstract

The utility model provides an acoustic imaging holder telemetering device applied to hydrogen refueling station hydrogen leakage detection, which is characterized in that a vertical rod is vertically and fixedly arranged on a horizontal reference surface, a first L-shaped bracket is arranged at the top of the vertical rod, and a rotary holder comprises a vertical first rotary part and a transverse second rotary part; the bottom of the first rotating part is rotationally connected with the horizontal bearing face of the first L-shaped support through a first rotating flange, a second L-shaped support is arranged at the bottom of the second rotating part, the vertical edge of the second L-shaped support is rotationally connected with the bottom of the second rotating part through a second rotating flange, and the acoustic imager is fixedly arranged on the transverse edge of the second L-shaped support. Under the driving of the rotating holder, the acoustic imager can generate 360-degree circumferential rotation, and is used for capturing hydrogen detonation sound data in a circumferential area of the vertical rod in real time based on an array phased array acoustic technology, so that a hydrogen leakage detection function is realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydrogen leakage monitoring technical field especially relates to a kind of acoustic imaging cloud platform telemeter device applied to hydrogen leakage detection of hydrogen filling station. BACKGROUND

[0002] Hydrogen is a colorless, odorless flammable and explosive gas. When the volume content of hydrogen in the air reaches 4%~74.2%, it will explode when encountering a fire or high temperature source. As an important facility in the hydrogen energy industry chain, hydrogen filling station has the characteristics of large hydrogen reserves, high working pressure and large safety hazards, especially in the preparation, storage and transportation of hydrogen. There is a certain risk of leakage. Since hydrogen is colorless and odorless, it is not easy to detect when leaking, which increases the difficulty of detection during manual inspection and poses a great safety risk to the inspector. Therefore, a safe and efficient device is needed to automatically identify and monitor hydrogen leakage to ensure that potential leakage problems are discovered and addressed in a timely manner, ensuring the safe operation of the hydrogen filling station. SUMMARY

[0003] The utility model provides a kind of acoustic imaging cloud platform telemeter device applied to hydrogen leakage detection of hydrogen filling station, to solve the technical problems that the monitoring precision of conventional monitoring scheme is poor, the monitoring coverage area is small, and the monitoring equipment itself is easily damaged by hydrogen deflagration under prior art.

[0004] To solve the above problems, the technical scheme of the utility model is as follows: a kind of acoustic imaging cloud platform telemeter device applied to hydrogen leakage detection of hydrogen filling station, comprising:

[0005] The vertical rod is vertically fixed on the horizontal reference surface, and the bottom of the vertical rod extends below the horizontal reference surface to be fixed with a cylindrical cage and a grounding angle steel, and the top of the vertical rod is fixed with a first L-shaped bracket.

[0006] The rotating cloud platform includes a first rotating part and a second rotating part fixedly connected vertically, the first rotating part is arranged in the same direction as the length extension direction of the vertical rod, and the bottom of the first rotating part is connected with the horizontal bearing surface of the first L-shaped bracket through the first rotating flange to realize the rotating connection in the vertical direction, the second rotating part is arranged in the vertical direction of the length extension direction of the vertical rod, and the bottom of the second rotating part is provided with a second L-shaped bracket, the vertical edge of the second L-shaped bracket is connected with the bottom of the second rotating part through the second rotating flange to realize the rotating connection in the horizontal direction.

[0007] An acoustic imager is fixed on the horizontal side of the second L-shaped support, and is configured to produce circumferential rotation along the axis of the first rotating part and / or the axis of the second rotating part under the driving of the rotating holder, and is used to capture hydrogen explosion sound data in the circumferential area of the vertical rod based on array phased array acoustic technology.

[0008] Preferably, the first rotating part and the second rotating part respectively adopt reciprocating rotation actions, and the single minimum rotation angle of the first rotating part is 5°, and the single maximum rotation angle is 360°, and the single minimum rotation angle of the second rotating part is 5°, and the single maximum rotation angle is 270°.

[0009] Preferably, the vertical rod is made of hot-dip galvanizing and plastic spraying process, and a pipeline cavity is arranged along the length direction of the vertical rod, and the distance between the inner wall of the pipeline cavity and the outer wall of the vertical rod is greater than or equal to 3mm, and the pipeline cavity is used to arrange power cables and communication cables, and power supply lines and data transmission lines of the rotating holder and the acoustic imager.

[0010] Preferably, a slot is arranged in the middle section of the vertical rod and is connected to the pipeline cavity, and an explosion-proof junction box is fixed in the slot, and a power adapter and an RS485 communication module are arranged in the explosion-proof junction box, the power adapter is used to convert 220V power provided by the power cable into 12V or 24V power required by the rotating holder and the acoustic imager, and the RS485 communication module is used to connect the communication cable and the data transmission line of the rotating holder and the acoustic imager.

[0011] Preferably, an access hole is arranged at the bottom end of the vertical rod close to the horizontal reference plane and is connected to the pipeline cavity, and the access hole is used to maintain the power cable and the communication cable in the pipeline cavity.

[0012] Preferably, the power cable and the communication cable in the extension direction of the horizontal reference plane are arranged in the pre-buried line pipe below the horizontal reference plane.

[0013] Preferably, the shell of the rotating holder and the acoustic imager is made of aluminum alloy material or glass fiber reinforced plastic material.

[0014] Preferably, the shell of the acoustic imager is covered with a rain cover.

[0015] Preferably, the first rotating part and the second rotating part are respectively provided with accommodating chambers, and the accommodating chambers of the first rotating part and the second rotating part are connected. The first rotating part is provided with an inlet, the second rotating part is provided with an outlet, and a flexible explosion-proof tube is provided between the outlet of the second rotating part and the terminal of the acoustic imager.

[0016] Preferably, a central control platform is also provided, which is connected to the rotating gimbal and the acoustic imager via a communication cable, for remotely controlling the operation of the rotating gimbal and the acoustic imager, and realizing the visualization display of the monitoring results of the acoustic imager.

[0017] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0018] This invention provides an acoustic imaging pan-tilt telemetry device for detecting hydrogen leaks in hydrogen refueling stations. It comprises a pole, a rotating pan-tilt unit, an acoustic imager, and a central control platform. The acoustic imager is mounted on the top of the pole, and the rotating pan-tilt unit allows for free adjustment of the monitoring angle in both the vertical and horizontal directions. Based on the principle of array-type phased array acoustics, it monitors hydrogen explosion sound data within the circumferential monitoring area of ​​the pole in a 360° manner, and can quickly and accurately locate the position of hydrogen explosion sounds within the monitoring area. This fulfills the automated, panoramic remote sensing function for hydrogen leaks within the hydrogen refueling station area. Furthermore, the acoustic imaging pan-tilt telemetry device is equipped with an explosion-proof design structure, effectively improving its explosion-proof capability and enabling repeated use. Attached Figure Description

[0019] Fig. 1 This utility model provides a structural schematic diagram of an acoustic imaging gimbal telemetry device for detecting hydrogen leaks at hydrogen refueling stations;

[0020] Fig. 2 This utility model provides a structural schematic diagram of a rotating gimbal and an acoustic imaging device.

[0021] Explanation of reference numerals in the attached drawings: 1: Pole; 2: Rotating gimbal; 21: First rotating part; 22: Second rotating part; 3: Acoustic imager; 4: First L-shaped bracket; 5: Second L-shaped bracket; 6: Columnar ground cage; 7: Grounding angle steel; 8: Explosion-proof junction box; 9: Inspection port; 10: Embedded conduit; 11: Rain cover; 12: Flexible explosion-proof pipe; 13: Inlet; 14: Outlet; 15: First rotating flange; 16: Second rotating flange. Detailed Implementation

[0022] The acoustic imaging cloud platform remote measuring device for hydrogen leakage detection applied to hydrogen refueling station is further described in detail below in combination with the drawings and specific embodiments. The advantages and characteristics of the present application will be clearer according to the following description and claims.

[0023] Referring to Figs. 1-2 The embodiment provides an acoustic imaging cloud platform remote measuring device for hydrogen leakage detection applied to hydrogen refueling station, which realizes the automatic monitoring function of hydrogen leakage and deflagration in the monitoring area through the online acoustic imaging instrument 3 device.

[0024] Specifically, the acoustic imaging cloud platform remote measuring device provided by the embodiment includes a vertical rod 1, a rotating cloud platform 2 and an acoustic imaging instrument 3, wherein the vertical rod 1 is vertically and fixedly arranged on a horizontal reference surface, preferably, the vertical rod 1 is arranged at the center position of the area to be monitored, so as to ensure that the monitoring angle of the acoustic imaging instrument 3 can completely cover the area to be monitored. The bottom of the vertical rod 1 extends below the horizontal reference surface and is fixedly provided with a cylindrical ground cage 6 and a grounding angle steel 7. The cylindrical ground cage 6 can increase the stability of the vertical rod 1, and the grounding angle steel 7 is used to provide a low-resistance path for the vertical rod 1, so as to avoid the influence of outdoor lightning on the operation of the rotating cloud platform 2 and the acoustic imaging instrument 3. The top of the vertical rod 1 is fixedly provided with a first L-shaped bracket 4, the vertical edge of the first L-shaped bracket 4 is fixedly connected with the side wall of the vertical rod 1, and the horizontal transverse edge of the first L-shaped bracket 4 is used to bear the rotating cloud platform 2 and the acoustic imaging instrument 3.

[0025] The rotating cloud platform 2 includes a first rotating part 21 and a second rotating part 22 which are fixedly connected in the vertical direction, wherein the first rotating part 21 is arranged in the vertical direction, that is, the first rotating part 21 is arranged in the coaxial direction of the length extension direction of the vertical rod 1, the bottom of the first rotating part 21 is connected with the horizontal bearing surface of the first L-shaped bracket 4 through the first rotating flange 15 in the vertical direction, and the first rotating part 21 is used to provide rotating power, that is, when the first rotating part 21 is started, the first rotating part 21 and the second rotating part 22 can produce synchronous rotation in the vertical direction. The second rotating part 22 is arranged in the horizontal direction, that is, the second rotating part 22 is arranged in the vertical direction of the length extension direction of the vertical rod 1, the bottom of the second rotating part 22 is provided with a second L-shaped bracket 5, the vertical edge of the second L-shaped bracket 5 is connected with the bottom of the second rotating part 22 through the second rotating flange 16 in the horizontal direction, and the second rotating part 22 is used to provide rotating power, that is, when the second rotating part 22 is started, the second rotating part 22 can drive the second L-shaped bracket 5 to produce rotation in the horizontal direction.

[0026] The acoustic imager 3 is fixed on the horizontal side of the second L-shaped support 5. Based on the array phased array acoustic principle technology, the acoustic imager 3 can determine the position of the sound source according to the phased array principle by measuring the signal phase difference of the sound wave reaching each microphone in a certain space, and measuring the amplitude of the sound source, that is, capturing the sound data in the circumferential monitoring area of the stand 1. Then it is determined whether the hydrogen explosion occurs in the monitoring area, and the specific position of the hydrogen explosion is determined. In this embodiment, the monitoring angle of the acoustic imager 3 is not fixed, that is, when the first rotating part 21 is started, the acoustic imager 3 can produce circumferential rotation along the axis direction of the first rotating part 21, and when the second rotating part 22 is started, the acoustic imager 3 can produce circumferential rotation along the axis direction of the second rotating part 22. The first rotating part 21 and the second rotating part 22 can be used in cooperation to effectively improve the monitoring space area of the acoustic imager 3, realize the surround and panoramic remote sensing function of the acoustic imager 3 to the monitoring area, and have higher monitoring coverage and accuracy. In addition, the tracking function of the hydrogen leakage track can be realized.

[0027] It is worth noting that in this embodiment, multiple sets of rotating cradles 2 and acoustic imagers 3 can be arranged on the top of a single stand 1 to work simultaneously, thereby improving the monitoring efficiency and reliability of the hydrogen explosion sound data.

[0028] In summary, the acoustic imaging cradle remote sensing device for hydrogen leakage detection of hydrogenation station provided in this embodiment realizes the accurate identification and positioning function of the hydrogen explosion of the hydrogen leakage of the hydrogenation station based on the array phased array acoustic principle.

[0029] In the following, the specific structure and function of the acoustic imaging cradle remote sensing device for hydrogen leakage detection of hydrogenation station provided in this embodiment will be described in further detail.

[0030] Preferably, in this embodiment, the first rotating part 21 and the second rotating part 22 adopt reciprocating rotation respectively, the minimum single rotation angle of the first rotating part 21 is 5°, the maximum single rotation angle is 360°, the minimum single rotation angle of the second rotating part 22 is 5°, and the maximum single rotation angle is 270°. That is, the first rotating part 21 and the second rotating part 22 can drive the acoustic imager 3 to rotate flexibly by 360°, while limiting the first rotating part 21 and the second rotating part 22 from rotating more than the maximum single rotation angle in the fixed rotation direction, so as to avoid the connection wire harness from being wound when the first rotating part 21 and the second rotating part 22 rotate.

[0031] Preferably, in the present embodiment, the stand pole 1 is made of hot-dip galvanizing and plastic spraying process, and has a solid metal protective layer on the outer wall surface, which can effectively prevent the damage caused by high temperature and high pressure after the circumferential close-range hydrogen deflagration of the stand pole 1. At the same time, the outer diameter of the stand pole 1 is preferably greater than or equal to 140 mm, and the stand pole 1 is designed as a through rod structure, that is, a pipeline cavity is arranged inside the stand pole 1 along the length extension direction, the distance between the inner wall of the pipeline cavity and the outer wall of the stand pole 1 is greater than or equal to 3 mm, and the pipeline cavity is used to arrange the power cable and the communication cable, and the power supply line and the data transmission line of the rotating holder 2 and the acoustic imaging instrument 3. The power cable, the communication cable, and the power supply line and the data transmission line of the rotating holder 2 and the acoustic imaging instrument 3 can be protected from damage by external hydrogen deflagration through the stand pole 1, and at the same time, the pipeline cavity inside the stand pole 1 is relatively isolated from the external environment, which can also avoid the sparks generated by the power cable, the communication cable, and the power supply line and the data transmission line of the rotating holder 2 and the acoustic imaging instrument 3 from igniting and exploding the hydrogen existing in the external space of the stand pole 1.

[0032] Preferably, in the present embodiment, the stand pole 1 has a slot communicating with the pipeline cavity in the middle section, and an explosion-proof junction box 8 is fixedly arranged in the slot. The explosion-proof junction box 8 is made of explosion-proof materials such as aluminum alloy materials or glass fiber reinforced plastic materials, and the interior of the explosion-proof junction box 8 is in a relatively closed state in the closed state. The explosion-proof junction box 8 is provided with a power adapter and an RS485 communication module. One end of the power adapter is connected with the power cable, and the other end is connected with the power supply line of the rotating holder 2 and the acoustic imaging instrument 3. The power adapter is used to convert the 220V power provided by the power cable into 12V or 24V power required by the rotating holder 2 and the acoustic imaging instrument 3. One end of the RS485 communication module is connected with the communication cable, and the other end is connected with the data transmission line of the rotating holder 2 and the acoustic imaging instrument 3. The RS485 communication module is used to realize the communication connection between the rotating holder 2 and the acoustic imaging instrument 3 and the external central control platform. Through the explosion-proof junction box 8, the use safety of the power adapter and the RS485 communication module can be effectively protected, that is, the connection safety between the power cable, the communication cable, and the data transmission line of the rotating holder 2 and the acoustic imaging instrument 3.

[0033] Preferably, the bottom end of the stand pole 1 close to the horizontal reference surface is provided with an access hole 9 communicating with the pipeline cavity, which facilitates the maintenance personnel to maintain the power cable and the communication cable in the pipeline cavity. An explosion-proof door is arranged outside the access hole 9, and when the explosion-proof door is closed, the inside and outside of the access hole 9 also form a relatively sealed state.

[0034] Preferably, in the embodiment, the embedded line pipe 10 is arranged below the horizontal reference surface, the power cable and the communication cable are arranged in the embedded line pipe 10, and extend from the self-supporting pole 1 to the bottom below the horizontal reference surface and into the internal pipe cavity of the self-supporting pole 1, so as to avoid the power cable and the communication cable from directly contacting hydrogen in the external environment, prevent the power cable and the communication cable from being damaged in the case of hydrogen deflagration, and prevent sparks generated by the power cable and the communication cable from igniting and exploding hydrogen existing in the external environment.

[0035] Preferably, in the embodiment, the rotating holder 2 and the shell of the acoustic imager 3 are made of aluminum alloy material or glass fiber reinforced plastic material, the aluminum alloy material or the glass fiber reinforced plastic material has good mechanical strength, that is, has better explosion-proof performance, can effectively improve the service life of the rotating holder 2 and the acoustic imager 3, and avoid the rotating holder 2 and the acoustic imager 3 from being damaged in the case of hydrogen deflagration at a close distance.

[0036] Preferably, in the embodiment, the shell of the acoustic imager 3 is covered with a rain cover 11, the rain cover 11 can effectively improve the waterproof performance of the acoustic imager 3 in the case of outdoor use, prolong the service life of the acoustic imager 3, and ensure the monitoring reliability of the acoustic imager 3.

[0037] Preferably, in the embodiment, the first rotating part 21 and the second rotating part 22 are respectively provided with accommodating cavities, and the accommodating cavities of the first rotating part 21 and the second rotating part 22 are in communication with each other, a wire inlet 13 is formed in the side wall of the first rotating part 21, the wire inlet 13 of the first rotating part 21 further communicates with the internal accommodating cavity thereof, a wire outlet 14 is formed in the side wall of the second rotating part 22, the wire outlet 14 of the second rotating part 22 further communicates with the internal accommodating cavity thereof, and a flexible explosion-proof pipe 12 is arranged between the wire outlet 14 of the second rotating part 22 and the wiring terminal of the acoustic imager 3. In the embodiment, the power supply line and the data transmission line of the acoustic imager 3 itself pass through the pipeline cavity of the stand 1, enter the wire inlet 13 of the first rotating part 21, pass through the accommodating cavities of the first rotating part 21 and the second rotating part 22 in sequence, pass out of the wire outlet 14 of the second rotating part 22, and are connected to the wiring terminal of the acoustic imager 3 through the flexible explosion-proof pipe 12. The power supply line and the data transmission line of the rotating holder 2 itself pass through the pipeline cavity of the stand 1, enter the wire inlet 13 of the first rotating part 21, and are respectively connected to the wiring terminal in the accommodating cavities of the first rotating part 21 and the second rotating part 22. In summary, in the embodiment, the power supply cable, the communication cable, the power supply line and the data transmission line of the acoustic imager 3 and the rotating holder 2 are hidden in the pre-buried pipe 10, the pipeline cavity of the stand 1, the accommodating cavities of the rotating holder 2 and the flexible explosion-proof pipe 12, which can effectively avoid damage to the connection line caused by hydrogen explosion, and prevent the connection line from igniting and exploding the hydrogen in the external environment.

[0038] Preferably, in the acoustic imaging holder telemetry device for hydrogen leakage detection of a hydrogen refueling station provided in the embodiment, a central control platform is further arranged, the central control platform is in communication connection with the rotating holder 2 and the acoustic imager 3 through a communication cable, is used for remotely controlling the operation of the rotating holder 2 and the acoustic imager 3, and realizes visual display of the monitoring result of the acoustic imager 3. Specifically, in the embodiment, the hydrogen explosion sound data in the monitoring area captured by the acoustic imager 3 is displayed in the form of an image on the central control platform, the distribution of the sound source in the monitoring space is displayed, that is, a spatial sound field distribution cloud picture-acoustic image is obtained, the color and brightness of the image are used to estimate the strength of the hydrogen leakage, the visual display of the hydrogen leakage situation is realized, and the central control platform can analyze and judge the sound data in real time. When a suspected hydrogen explosion occurs, the central control platform can output an alarm information to realize the early warning function.

[0039] Next, the use method of the acoustic imaging holder telemetry device for hydrogen leakage detection of a hydrogen refueling station provided in the embodiment will be further described to make the structure and function of the embodiment more clear.

[0040] Specifically, the following steps are included:

[0041] S1: According to the hydrogen station field control requirements, an acoustic imaging cloud platform remote measuring device is deployed in the hydrogen station, which is preferably arranged at the center position of the monitoring area, and then the power supply connection and communication connection of the rotating cloud platform 2 and the acoustic imaging instrument 3 are ensured to be correct.

[0042] S2: The alarm threshold, rotating path of the rotating cloud platform 2 and other parameters are pre-set in the central control platform to realize the online remote measuring function of the rotating cloud platform 2 and the acoustic imaging instrument 3.

[0043] S3: The rotating cloud platform 2 drives the acoustic imaging instrument 3 to reciprocating rotate according to the set rotating path, and the acoustic imaging instrument 3 captures the hydrogen explosion sound data in its monitoring angle in real time during the rotating process. When the captured sound data during the monitoring process does not exceed the alarm threshold, it indicates that the monitoring area is relatively safe, the central control platform does not output alarm information, and the sound data is backed up in real time. When a sound source exceeding the alarm threshold appears during the monitoring process, the central control platform displays the distribution of the sound source in the monitoring space in the form of an image, and sends adjustment instructions to the rotating cloud platform 2, and the rotating platform drives the acoustic imaging instrument 3 to rotate left and right by 5° in turn, and reacquires the sound data. If it is still determined that there is a sound source exceeding the alarm threshold after the second judgment, it is determined that there is a "hydrogen suspected leakage" in the current monitoring area, and the central control platform outputs an alarm information, which includes the three-dimensional coordinates of the sound source, the sound source amplitude and other data.

[0044] S4: When there is a "hydrogen suspected leakage" in the monitoring area, the central control platform automatically adjusts the rotating path of the rotating cloud platform 2 according to the moving path of the sound source, so that the acoustic imaging instrument 3 can realize the tracking function of the hydrogen leakage trajectory.

[0045] S5: In a unit time, if the acoustic imaging instrument 3 does not capture a sound source exceeding the alarm threshold again, the central control platform determines that the "hydrogen suspected leakage" in the current monitoring area is removed, and the rotating cloud platform 2 drives the acoustic imaging instrument 3 to reciprocating rotate according to the set rotating path again. At the same time, the central control platform generates relevant records for this "hydrogen suspected leakage" situation, including time, point, event name, abnormal picture, supports input event confirmation details, handler, processing / repair picture, processing / repair time and other contents.

[0046] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments. Even if various changes are made to the utility model, as long as the changes belong to the scope of the utility model claims and equivalent technologies, they still fall within the protection scope of the utility model.

Claims

1. An acoustic imaging cloud platform remote measuring device applied to hydrogen leakage detection of hydrogen refueling station, characterized in that, Comprise: a vertical rod vertically fixed on a horizontal reference plane, a cylindrical cage and a grounding angle steel fixed at the bottom of the vertical rod below the horizontal reference plane, a first L-shaped bracket fixed at the top of the vertical rod; a rotating holder comprising a first rotating part and a second rotating part fixed vertically connected, the first rotating part is arranged along the coaxial direction of the length extension direction of the vertical rod, and the bottom of the first rotating part is connected with the horizontal bearing surface of the first L-shaped bracket through the first rotating flange to realize the rotating connection in the vertical direction, the second rotating part is arranged along the vertical direction of the length extension direction of the vertical rod, the bottom of the second rotating part is provided with a second L-shaped bracket, and the vertical edge of the second L-shaped bracket is connected with the bottom of the second rotating part through the second rotating flange to realize the rotating connection in the horizontal direction; an acoustic imager fixed on the horizontal edge of the second L-shaped bracket, the acoustic imager is configured to generate circumferential rotation along the axis direction of the first rotating part and / or the axis direction of the second rotating part under the driving of the rotating holder, and is used for capturing hydrogen explosion sound data in the circumferential area of the vertical rod based on array phased array acoustic technology.

2. The acoustic imaging cloud platform telemetry device for hydrogen leakage detection of hydrogen refueling station according to claim 1, characterized in that, The first rotating part and the second rotating part adopt reciprocating rotating action respectively, the minimum single rotation angle of the first rotating part is 5°, the maximum single rotation angle is 360°, the minimum single rotation angle of the second rotating part is 5°, and the maximum single rotation angle is 270°.

3. The acoustic imaging cloud platform telemetry device for hydrogen leakage detection of hydrogen refueling station according to claim 1, characterized in that, The vertical rod is made of hot-dip galvanizing and plastic spraying process, the vertical rod is provided with a pipeline cavity arranged along the length extension direction, the distance between the inner wall of the pipeline cavity and the outer wall of the vertical rod is greater than or equal to 3mm, the pipeline cavity is used for arranging power cable and communication cable, and the rotating holder and the acoustic imager are provided with power supply line and data transmission line.

4. The acoustic imaging cloud platform telemetry device for hydrogen leakage detection of hydrogen refueling station according to claim 3, characterized in that, A slot communicating with the pipeline cavity is arranged in the middle of the vertical rod, an explosion-proof junction box is fixed in the slot, a power adapter and an RS485 communication module are arranged in the explosion-proof junction box, the power adapter is used for converting 220V power provided by the power cable into 12V or 24V power required by the rotating holder and the acoustic imager, and the RS485 communication module is used for connecting the communication cable with the data transmission line of the rotating holder and the acoustic imager.

5. The acoustic imaging cloud platform telemetry device for hydrogen leakage detection of hydrogen filling station according to claim 4, characterized in that, A maintenance opening communicating with the pipeline cavity is arranged at the bottom end of the vertical rod close to the horizontal reference plane, and the maintenance opening is used for maintaining the power cable and the communication cable in the pipeline cavity.

6. The acoustic imaging cloud platform telemetry device for hydrogen leakage detection of hydrogen filling station according to claim 3, characterized in that, The power cable and the communication cable arranged in the horizontal reference plane extension direction are arranged in the embedded pipe below the horizontal reference plane.

7. The acoustic imaging cloud platform telemetry device for hydrogen leak detection of hydrogen filling station according to claim 1, wherein, The shell of the rotating holder and the acoustic imager is made of aluminum alloy material or glass fiber reinforced plastic material.

8. The acoustic imaging cloud platform telemetry device for hydrogen leak detection of hydrogen filling station according to claim 1, characterized in that, The shell of the acoustic imager is covered with a rainproof cover.

9. The acoustic imaging cloud platform telemetry device for hydrogen leak detection of hydrogen filling station according to claim 1, wherein, The first rotating part and the second rotating part are respectively provided with accommodating cavities, and the accommodating cavities of the first rotating part and the second rotating part are communicated, a wire inlet is arranged in the first rotating part, a wire outlet is arranged in the second rotating part, and a flexible explosion-proof tube is arranged between the wire outlet of the second rotating part and the wiring end of the acoustic imager.

10. The acoustic imaging cloud platform telemetry device for hydrogen leak detection of hydrogen filling station according to claim 1, wherein, A central control platform is further arranged, which is in communication connection with the rotating holder and the acoustic imager through communication cables, is used for remotely controlling the operation of the rotating holder and the acoustic imager, and realizes visual display of the monitoring result of the acoustic imager.

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