Self-adaptive adjustment suction gun type leak detection device

Abstract

The invention discloses a self-adaptive adjustment suction gun type leakage detection device, and belongs to the technical field of leakage detection, the leakage detection device comprises a connecting assembly, the connecting assembly is provided with a suction gun, the front end of the suction gun is provided with a suction nozzle used for collecting gas, and the suction gun can rotate relative to the connecting assembly to change the angle between the suction nozzle of the suction gun and a leakage point. The suction gun can slide relative to the connecting assembly so as to change the distance between a suction nozzle of the suction gun and the leakage point, a height area is preset on the to-be-detected product, and the suction gun is adjusted to the angle and distance corresponding to the height area according to the height area to which the leakage point belongs. According to the invention, the instability of manual operation is fundamentally overcome, the optimal angle and distance parameters of the high, medium and low detection areas are scientifically preset based on the gas diffusion principle, the experience-dependent hand feeling is converted into a stable and reproducible automatic process, the sensitivity, reliability and efficiency of leak detection are significantly improved, and the detection accuracy is improved. And a key technical support is provided for automatic leak detection.

Description

Technical Field

[0001] This invention belongs to the field of leak detection technology, and in particular relates to an adaptively adjustable suction gun type leak detection device. Background Technology

[0002] Gas leak detection is a critical aspect of industrial production, equipment maintenance, and safety monitoring. Especially for pressure vessels, pipeline systems, and sealing equipment, even a small amount of gas leakage can lead to not only media loss and reduced efficiency but also serious safety and environmental problems.

[0003] Traditional leak detection methods include bubble leak detection, pressure decay method, halogen leak detection, and helium mass spectrometry leak detection. Among them, the suction gun leak detection method is widely used in industrial fields because of its advantages such as accurate positioning, high sensitivity, and applicability to large-volume or complex equipment.

[0004] In existing leak detection operations using suction guns, manual operation typically relies on holding the suction gun and slowly moving it across the surface to be inspected, with the leak point determined by the detector's response. However, manual operation suffers from poor stability, making it difficult to maintain the optimal distance and angle between the suction gun and the leak point, leading to fluctuations in detection sensitivity and potentially missing minute leaks or generating false alarms.

[0005] Therefore, there is an urgent need to design an adaptive suction-type leak detection device to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide an adaptively adjustable suction gun-type leak detection device, which has the advantages of automatically adjusting the distance and angle of the suction gun relative to the leak point, and matching the optimal detection posture according to a preset height area, thus solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the specific technical solution of the adaptive adjustment suction gun type leak detection device of the present invention is as follows: An adaptive adjustment suction gun leak detection device includes a connecting assembly, on which a suction gun is provided. The front end of the suction gun is provided with a suction nozzle for collecting gas. The suction gun can rotate relative to the connecting assembly to change the angle between the suction gun nozzle and the leak point. The suction gun can slide relative to the connecting assembly to change the distance between the suction gun nozzle and the leak point. The sample to be inspected has a preset height zone. According to the height zone to which the leak point is located, the suction gun is adjusted to the angle and distance corresponding to that height zone.

[0008] Furthermore, the height region includes a high-level region, a mid-level region, and a low-level region, where the height of the leak point is H. P The height of the sample to be inspected is H; In H P When the time interval is greater than 0.66H, the leak point is located in the high-level region. In 0.33H≤H P When the value is ≤0.66H, the leak point is located in the median region; In H P When the value is less than 0.33H, the leak point is located in the low-level region.

[0009] Furthermore, the suction gun has a first state, a second state, and a third state; When the leak point is located in a high-level area, the suction gun is in its first state, the angle between the suction gun nozzle and the leak point is 60°-80°, and the distance between the suction gun nozzle and the leak point is 5mm-7mm. When the leak point is located in the middle region, the suction gun is in the second state, the angle between the suction gun nozzle and the leak point is 45°-60°, and the distance between the suction gun nozzle and the leak point is 3mm-5mm; When the leak point is located in a low-lying area, the suction gun is in its third state, with the angle between the suction gun nozzle and the leak point being 90° and the distance between the suction gun nozzle and the leak point being 7-10 mm.

[0010] Furthermore, the connecting component includes a support part with a groove, and a support rod on the suction gun, which can slide along the groove via the support rod.

[0011] Furthermore, a sleeve is fixedly connected to the suction gun, and a connecting rod is fixedly connected to the sleeve. The end of the connecting rod away from the suction gun is fixedly connected to the support rod.

[0012] Furthermore, the support rod and the suction nozzle are located on the same axis.

[0013] Furthermore, a hollow cavity is provided inside the support section, and an electric push rod is provided inside the hollow cavity. The fixed end of the electric push rod is fixedly connected to the inner wall of the hollow cavity, and a collar is fixedly connected to the output end of the electric push rod. The collar is sleeved on the support rod so as to drive the support rod and the suction gun to slide through the output end of the electric push rod.

[0014] Furthermore, a rack is fixedly connected inside the support section, and a gear is fixedly connected to the support rod. The gear meshes with the rack so that when the suction gun slides, it rotates synchronously around the support rod as the axis, allowing the suction gun to switch between different states.

[0015] Furthermore, the suction gun is equipped with a height sensor, which measures the absolute height of the suction gun relative to the ground or a reference plane.

[0016] Furthermore, it also includes a controller, which receives the height measured by the height sensor, then determines the height region to which the leak point belongs, and controls the suction gun to adjust to the state corresponding to the height region.

[0017] The present invention has the following advantages: The device fundamentally overcomes the instability of manual operation. Based on the principle of gas diffusion, it scientifically presets the optimal angle and distance parameters of the three detection zones (high, medium and low), transforming the experience-dependent manual operation into a stable and reproducible automated process. This significantly improves the sensitivity, reliability and efficiency of leak detection, and provides key technical support for automated leak detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the suction gun of the present invention in its first state; Figure 2 This is a schematic diagram of the suction gun of the present invention in the second state; Figure 3 This is a schematic diagram of the suction gun of the present invention in the third state; Figure 4 This is a schematic diagram of the sleeve and support rod of the present invention; Figure 5 This is a schematic diagram of the structure of the support part and the slide groove of the present invention; Figure 6 This is a schematic diagram of the structure of the electric push rod, rack, and gear of the present invention; The markings in the diagram are as follows: 1. Suction gun; 2. Connecting assembly; 21. Connecting rod; 22. Sleeve; 23. Support rod; 24. Gear; 25. Support part; 26. Slide groove; 27. Rack; 28. Collar; 29. ​​Electric push rod; 3. Connecting part. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 6 This invention describes an adaptively adjustable suction gun-type leak detection device.

[0022] In existing leak detection operations using suction guns, manual handling of the suction gun is usually required. However, manual operation is unstable and it is difficult to maintain the optimal distance and angle between the suction gun and the leak point, resulting in fluctuations in detection sensitivity, which may lead to missed detection of minor leaks or false alarms.

[0023] Therefore, this adaptive suction gun leak detection device includes a connecting component 2, on which a suction gun 1 is provided. The front end of the suction gun 1 is provided with a suction nozzle for collecting gas. The suction gun 1 can rotate relative to the connecting component 2 to change the angle between the suction gun 1 nozzle and the leak point. The suction gun 1 can slide relative to the connecting component 2 to change the distance between the suction gun 1 nozzle and the leak point. The sample to be inspected has a preset height area. According to the height area to which the leak point belongs, the suction gun 1 is adjusted to the angle and distance corresponding to that height area.

[0024] The connecting component 2 includes a support part 25, on which a groove 26 is provided. The suction gun 1 is provided with a support rod 23. The suction gun 1 can slide along the groove 26 via the support rod 23. Specifically, the support part 25 can be plate-shaped or rod-shaped.

[0025] A connecting part 3 is fixedly connected to the support part 25. Preferably, the connecting part 3 is a quick interface, which is connected to a quick connector on the robotic arm. The robotic arm drives the connecting component 2 and the suction gun 1 to move in order to detect the leakage points of the sample to be inspected. In other embodiments of the present invention, the connecting part 3 can also be a handheld part, so that it can be manually held and the leakage points of the sample to be inspected can be detected manually.

[0026] A sleeve 22 is fixedly connected to the suction gun 1, and a connecting rod 21 is fixedly connected to the sleeve 22. The end of the connecting rod 21 away from the suction gun 1 is fixedly connected to the support rod 23. Specifically, the sleeve 22 can be designed as a split type so that it can be fitted onto the suction gun 1. The split sleeve 22 has a through hole. After the split sleeve 22 is fitted onto the suction gun 1 and the through hole overlaps, it is fastened with bolts to fix the sleeve 22 to the suction gun 1.

[0027] A hollow cavity is provided inside the support part 25, and an electric push rod 29 is provided inside the hollow cavity. The fixed end of the electric push rod 29 is fixedly connected to the inner wall of the hollow cavity, and a collar 28 is fixedly connected to the output end of the electric push rod 29. The collar 28 is sleeved on the support rod 23 so as to drive the support rod 23 and the suction gun 1 to slide through the output end of the electric push rod 29.

[0028] The electric actuator 29 has three positions: the first position, the second position, and the third position.

[0029] A rack 27 is fixedly connected inside the support part 25, and a gear 24 is fixedly connected on the support rod 23. The gear 24 meshes with the rack 27 so that when the suction gun 1 slides, it rotates synchronously around the support rod 23 as the axis, so that the suction gun 1 switches between different states. The transmission ratio of the gear and rack pair is set so that the sliding distance and the rotation angle are in a preset relationship.

[0030] Preferably, the support rod 23 and the suction nozzle of the suction gun 1 are located on the same axis.

[0031] This leak detection device employs a compact structure that uses an electric push rod 29 to drive linear sliding and a gear rack pair to convert it into rotational motion. This allows for the synchronous, continuous, and deterministic control of the two key degrees of freedom of the suction gun 1: the extension / retraction distance and the pitch angle, using only one electric push rod 29.

[0032] The height region includes a high-level region, a mid-level region, and a low-level region, where the height of the leak point is H. P The height of the sample to be inspected is H; In H P When the time interval is greater than 0.66H, the leak point is located in the high-level region. In 0.33H≤H P When the value is ≤0.66H, the leak point is located in the median region; In H P When the value is less than 0.33H, the leak point is located in the low-level region.

[0033] Furthermore, the suction gun 1 has a first state, a second state, and a third state; When the leak point is located in a high-level area, the leaking gas, after being ejected, mainly diffuses upwards and in all directions under the action of buoyancy, with a long journey, forming a scattered cloud with low concentration, wide distribution range, and significant influence from the surrounding airflow.

[0034] At this time, suction gun 1 is in the first state. The angle between the suction nozzle of suction gun 1 and the horizontal line of the leak point is 60°-80°. This angle allows the suction direction of the nozzle to actively cut into or align with the natural upward path of the gas. Compared with a small angle parallel to the surface, a large angle can more effectively intercept the upward drifting gas and direct the maximum suction range above the area where the gas concentration may be higher, rather than its edge. If the angle is too small, the nozzle is placed almost parallel to the leak point directly above it, like a sloping roof over a chimney. Most of the rising gas escapes from the side of the nozzle and is difficult to be effectively sucked in. Preferably, the angle between the suction nozzle of suction gun 1 and the leak point is 70°. In other embodiments of the present invention, when suction gun 1 is in the first state, the angle between the suction nozzle of suction gun 1 and the leak point can also be other values ​​within the range of 60°-80°.

[0035] The distance between the nozzle of suction gun 1 and the leak point is 5-7 mm. A slightly larger distance expands the sampling area of ​​the nozzle, which is equivalent to using a larger net to catch the diffused gas cloud, increasing the probability of capturing a sufficient volume of gas. If the distance is too close, the local strong suction airflow generated by suction gun 1 will disturb and disperse the already thin and loose gas cloud, which will lead to signal attenuation or instability. Maintaining an appropriate distance can maintain the relative stability of the gas cloud structure and achieve stable sampling. Preferably, the distance between the nozzle of suction gun 1 and the leak point is 6 mm. In other embodiments of the present invention, in the first state, the distance between the nozzle of suction gun 1 and the leak point can also be other values ​​within the range of 5-7 mm.

[0036] When the leak point is located in the mid-range, the gas has risen a certain distance and begun to diffuse but has not yet been severely diluted. The concentration is moderate, and the directionality is still relatively good but has begun to weaken.

[0037] At this time, suction gun 1 is in the second state. The angle between the suction nozzle of suction gun 1 and the horizontal line of the leak point is 45°-60°. This angle is between vertical and horizontal, so that the suction direction and the inclined upward trajectory formed by the gas under the combined action of buoyancy and initial momentum can be optimally matched. Thus, the gas is efficiently introduced into the suction nozzle before it is further diffused and diluted laterally. If the angle is too small, it is not conducive to capturing the upward gas. If the angle is too large, the suction nozzle may be facing the area below where the concentration has begun to decrease. Preferably, the angle between the suction nozzle of suction gun 1 and the leak point is 50°. In other embodiments of the present invention, when suction gun 1 is in the second state, the angle between the suction nozzle of suction gun 1 and the leak point can also be other values ​​within the range of 45°-60°.

[0038] The distance between the suction nozzle of suction gun 1 and the leak point is 3-5 mm. Before the gas is excessively diluted by air, it is as close to the leak point as possible to collect the gas sample with the highest concentration under the current conditions, thereby obtaining the strongest detection signal. Preferably, the distance between the suction nozzle of suction gun 1 and the leak point is 4 mm. In other embodiments of the present invention, when suction gun 1 is in the second state, the distance between the suction nozzle of suction gun 1 and the leak point can also be other values ​​within the range of 3-5 mm.

[0039] When the leak point is located in a low-lying area, the gas has just escaped from the leak hole and has the highest initial concentration. Under the action of buoyancy, it forms a vertically upward column of gas with a strong directionality.

[0040] At this time, suction gun 1 is in the third state. The angle between the suction nozzle of suction gun 1 and the horizontal line of the leak point is 90°, which is perpendicular to the horizontal line of the leak point. This makes the axis of suction gun 1 completely consistent with the natural direction of gas injection, ensuring that the entire air intake surface of the nozzle is within the coverage of the high-concentration gas column. This maximizes the sampling efficiency, and the gas is sucked in as soon as it is ejected, with the shortest path and the least delay. Therefore, the steepest and sharpest response signal peak can be obtained, which is beneficial for accurate positioning.

[0041] The distance between the suction nozzle of suction gun 1 and the leak point is 7-10 mm to maintain a suitable distance, which can form a small stable flow cavity below the nozzle. High-concentration gas can be steadily accumulated in this cavity and then uniformly sucked in. This avoids the interference of suction force on the micro-flow field at the leak point caused by the distance being too close. In other embodiments of the present invention, when suction gun 1 is in the third state, the distance between the suction nozzle of suction gun 1 and the leak point can also be other values ​​within 7-10 mm.

[0042] Each state of this leak detection device is scientifically set based on the diffusion dynamics characteristics (such as concentration, direction, and flow rate) of the leaking gas in the corresponding height area. For example, in the low-level area, a vertical angle and a moderate distance are used to completely capture the high-concentration vertical gas column while avoiding interference from the suction airflow at the leak point. In the high-level area, a large angle and a slightly longer distance are used to effectively intercept the diffused rarefied gas cloud. This ensures that the strongest and most stable detection signal can be obtained at any location, reducing missed detections and false alarms.

[0043] When the suction gun 1 switches from the first state to the second state, the electric push rod 29 extends from the first position to the second position, pulling the support rod 23 to slide outwards from the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, reducing the angle between the nozzle and the leakage point, until the electric push rod 29 extends to the second position, and the switching is completed.

[0044] When the suction gun 1 switches from the first state to the third state, the electric push rod 29 retracts from the first position to the third position, pulling the support rod 23 to slide inward to the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, increasing the angle between the nozzle and the leakage point, until the electric push rod 29 retracts to the third position, and the switching is completed.

[0045] When the suction gun 1 switches from the second state to the first state, the electric push rod 29 retracts from the second position to the first position, pushing the support rod 23 to slide inward to the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, increasing the angle between the nozzle and the leakage point, until the electric push rod 29 retracts to the first position, and the switching is completed.

[0046] When the suction gun 1 switches from the second state to the third state, the electric push rod 29 retracts from the second position to the third position, pulling the support rod 23 to slide inward to the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, increasing the angle between the nozzle and the leakage point, until the electric push rod 29 retracts to the third position, and the switching is completed.

[0047] When the suction gun 1 switches from the third state to the first state, the electric push rod 29 extends from the third position to the first position, pushing the support rod 23 to slide outward of the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, reducing the angle between the nozzle and the leakage point, until the electric push rod 29 extends to the first position, and the switching is completed.

[0048] When the suction gun 1 switches from the third state to the second state, the electric push rod 29 extends from the third position to the second position, pushing the support rod 23 to slide outwards from the support part 25. While sliding, the support rod 23 rotates around its own axis, causing the suction gun 1 to rotate, reducing the angle between the nozzle and the leakage point, until the electric push rod 29 extends to the second position, and the switching is completed.

[0049] The suction gun 1 is equipped with a height sensor, an attitude feedback sensor, and a distance closed-loop sensor; The absolute height of the suction gun 1 relative to the ground or a reference plane is measured by a height sensor. Specifically, a miniature laser rangefinder or an ultrasonic sensor can be used, which is fixedly installed on the nozzle of the suction gun 1. Its measuring axis is vertically downward, continuously measuring the distance from the device to the reference plane below, thereby calculating the absolute height of the leak point.

[0050] The pitch angle of the suction gun 1 body is monitored by an attitude feedback sensor. Specifically, an inertial measurement unit or tilt sensor can be used and directly fixed inside the suction gun 1 to ensure that its measurement axis is consistent with the axis of the suction gun 1, so as to continuously output the angle between the axis of the suction gun 1 and the horizontal plane.

[0051] The actual straight-line distance from the nozzle of the suction gun 1 to the surface of the sample to be inspected is measured by a distance closed-loop sensor. Specifically, a high-precision, small-spot coaxial laser rangefinder sensor can be used, which is fixedly installed at the front end of the suction gun 1, and its measurement point is on the same plane perpendicular to the axis of the suction gun 1 as the air inlet center of the nozzle.

[0052] It also includes a controller, which receives the height measured by the height sensor, then determines the height zone to which the leak point belongs, and controls the suction gun 1 to adjust to the state corresponding to the height zone.

[0053] The working process of this leak detection device: S1. First, the operator measures the total height of the product to be inspected, and then inputs or calibrates the total height H of the product to be inspected through the controller interface or external system. S2. The controller presets the judgment thresholds for three height regions based on the total height H of the current product to be inspected, namely the high region, the middle region, and the low region. S3. The operator holds the device or has it held by the robotic arm and moves the suction gun 1 to the vicinity of the item to be inspected to begin scanning. S4. The height sensor continuously measures the absolute height of the suction gun 1 relative to the ground or reference plane and sends it to the controller. The controller estimates the height H of the leakage point corresponding to the current suction nozzle in real time based on the total height H of the product to be inspected and the structure of the product. P The controller will H P The system automatically determines the height region to which the current scan point belongs by comparing it with a preset threshold. S5. Based on the determined area result, the controller calls the state corresponding to suction gun 1. The controller reads the current angle of the attitude feedback sensor, the current distance of the distance closed-loop sensor, and the gear position of the electric push rod 29, and calculates the gear position that the electric push rod 29 needs to output to. S6. The controller sends a drive command to the electric push rod 29, and the output end of the electric push rod 29 begins to extend and retract. Its output end drives the support rod 23 to slide along the slide groove 26 through the collar 28, and the support rod 23 is forced to rotate around its own axis while sliding. This compound motion is transmitted through the connecting rod 21 and the sleeve 22, so that the suction gun 1 body slides and rotates synchronously until the suction gun 1 moves to the desired state.

[0054] S7. The controller sends a status ready signal. The operator or robotic arm controls the suction gun 1 to remain stable in this position. At this time, the suction nozzle samples the suspected leak point at the optimal angle and distance. The leak gas is sucked in and sent to the mass spectrometer leak detector through the pipeline. The instrument displays the leak rate value. S8. After the test is completed, the leak detection device moves with the operator or robotic arm to the next scanning point, re-judges the area and adjusts its posture according to the new position, and realizes adaptive detection throughout the entire process.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An adaptively adjustable suction gun-type leak detection device, characterized in that, The device includes a connecting assembly with a suction gun. The front end of the suction gun has a nozzle for collecting gas. The suction gun can rotate relative to the connecting assembly to change the angle between the suction gun nozzle and the leak point. The suction gun can slide relative to the connecting assembly to change the distance between the suction gun nozzle and the leak point. The sample to be inspected has a preset height zone. Based on the height zone to which the leak point is located, the suction gun is adjusted to the angle and distance corresponding to that height zone.

2. The adaptively adjustable suction-gun type leak detection device according to claim 1, characterized in that, The height region includes a high-level region, a mid-level region, and a low-level region, where the height of the leak point is H. P The height of the sample to be inspected is H; In H P When the time interval is greater than 0.66H, the leak point is located in the high-level region. In 0.33H≤H P When the value is ≤0.66H, the leak point is located in the median region; In H P When the value is less than 0.33H, the leak point is located in the low-level region.

3. The adaptively adjustable suction-gun type leak detection device according to claim 2, characterized in that, The suction gun has a first state, a second state, and a third state; When the leak point is located in a high-level area, the suction gun is in its first state, the angle between the suction gun nozzle and the leak point is 60°-80°, and the distance between the suction gun nozzle and the leak point is 5mm-7mm. When the leak point is located in the middle region, the suction gun is in the second state, the angle between the suction gun nozzle and the leak point is 45°-60°, and the distance between the suction gun nozzle and the leak point is 3mm-5mm; When the leak point is located in a low-lying area, the suction gun is in its third state, with the angle between the suction gun nozzle and the leak point being 90° and the distance between the suction gun nozzle and the leak point being 7-10 mm.

4. The adaptively adjustable suction-gun type leak detection device according to claim 1, characterized in that, The connecting component includes a support part with a groove, and a support rod on the suction gun, which can slide along the groove via the support rod.

5. The adaptively adjustable suction-gun type leak detection device according to claim 4, characterized in that, A sleeve is fixedly connected to the suction gun, and a connecting rod is fixedly connected to the sleeve. The end of the connecting rod away from the suction gun is fixedly connected to the support rod.

6. The adaptively adjustable suction-gun type leak detection device according to claim 4, characterized in that, The support rod and the suction nozzle are located on the same axis.

7. The adaptively adjustable suction-gun type leak detection device according to claim 4, characterized in that, The support section has a hollow cavity, and an electric push rod is installed inside the hollow cavity. The fixed end of the electric push rod is fixedly connected to the inner wall of the hollow cavity, and a collar is fixedly connected to the output end of the electric push rod. The collar is fitted onto the support rod so that the output end of the electric push rod can drive the support rod and the suction gun to slide.

8. The adaptively adjustable suction-gun type leak detection device according to claim 7, characterized in that, A rack is fixedly connected inside the support section, and a gear is fixedly connected on the support rod. The gear meshes with the rack so that when the suction gun slides, it rotates synchronously around the support rod as the axis, allowing the suction gun to switch between different states.

9. The adaptively adjustable suction-gun type leak detection device according to claim 1, characterized in that, The suction gun is equipped with a height sensor, which measures the absolute height of the suction gun relative to the ground or a reference plane.

10. The adaptively adjustable suction-gun type leak detection device according to claim 9, characterized in that, It also includes a controller, which receives the height measured by the height sensor, then determines the height zone to which the leak point belongs, and controls the suction gun to adjust to the state corresponding to that height zone.

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