SF6 gas leakage ultrasonic detection equipment for GIS pipeline

Abstract

The invention relates to the technical field of leakage ultrasonic detection, and discloses SF6 gas leakage ultrasonic detection equipment for a GIS pipeline, which comprises a handheld mechanism, a leakage detection mechanism, a switching mechanism and a controller, and is characterized in that the leakage detection mechanism is arranged on the handheld mechanism and comprises a first sensor mounting position and a posture adjusting mechanism; the posture adjusting mechanism is configured to drive the sensor mounted on the first sensor mounting position to perform posture adjustment; the switching mechanism is arranged on the handheld mechanism and comprises a second sensor mounting position; the controller is arranged in the handheld mechanism and is electrically connected with the leak detection mechanism and the switching mechanism; the equipment is at least provided with the ultrasonic micro-leakage fine detection sensor and the ultrasonic global quick scanning sensor, the ultrasonic micro-leakage fine detection sensor and the ultrasonic global quick scanning sensor can be exchanged between the first sensor mounting position of the leakage detection mechanism and the second sensor mounting position of the switching mechanism through the switching mechanism, and the detection efficiency and accuracy are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic leak detection technology, specifically to ultrasonic leak detection equipment for SF6 gas leaks in GIS pipelines. Background Technology

[0002] Gas-insulated metal-enclosed switchgear (GIS) is widely used in high-voltage power transmission and distribution systems due to its compact structure, high reliability, and low maintenance requirements. GIS equipment and pipelines typically use sulfur hexafluoride (SF6) as the insulation and arc-quenching medium, whose excellent insulation performance and arc-quenching capability ensure efficient and stable operation. However, during long-term operation, GIS equipment and pipelines may experience SF6 gas leakage due to vibration, seal aging, and inadequate installation techniques. SF6 gas leakage not only leads to a decline in equipment insulation performance, affecting the safe and stable operation of the power system, but also has a serious environmental impact due to its high global warming potential. Therefore, regular and efficient SF6 gas leakage detection of GIS equipment and pipelines is of great significance.

[0003] Traditional SF6 gas leak detection methods mainly include the soap bubble method, infrared imaging method, laser leak detection method, and acoustic detection method. The soap bubble method is simple to operate but inefficient and difficult to detect tiny leaks; the infrared imaging method can achieve non-contact detection, but it is greatly affected by ambient temperature and background radiation, and the equipment cost is high; the laser leak detection method has high sensitivity, but it is also expensive and has strict requirements for the operating environment.

[0004] In recent years, leak detection technology based on ultrasonic principles has gradually become a research hotspot due to its advantages such as fast response speed, strong anti-interference ability, and applicability to harsh environments. Ultrasonic detection captures the ultrasonic signals generated during gas leaks to locate and quantitatively analyze the leak point, making it particularly suitable for detecting high-pressure gas leaks.

[0005] However, existing ultrasonic testing equipment still has some limitations. First, most devices are single-function, typically equipped with only a single sensor, making it difficult to balance detection range and accuracy. For example, full-range scanning sensors are suitable for quickly locating leak areas, but lack sensitivity for minute leaks; while high-precision sensors can accurately identify minute leaks, their detection efficiency is low, making them unsuitable for large-scale screening. Second, traditional equipment relies on manual hand-held operation during testing, which is prone to sensor position deviations due to personnel shaking or movement, affecting the accuracy and consistency of the test results. Summary of the Invention

[0006] This invention provides an ultrasonic detection device for SF6 gas leaks in GIS pipelines to solve the above-mentioned problems.

[0007] In a first aspect, the present invention provides an ultrasonic detection device for SF6 gas leakage in GIS pipelines, comprising: Handheld mechanism; A leak detection mechanism, mounted on the handheld mechanism, is used to perform ultrasonic detection of SF6 gas leaks in GIS pipelines. The leak detection mechanism includes a first sensor mounting position and an attitude adjustment mechanism. The attitude adjustment mechanism is configured to drive the sensor mounted on the first sensor mounting position to adjust its position and attitude. A switching mechanism, disposed on the handheld mechanism, is used for changing the sensor; the switching mechanism includes a second sensor mounting position; and The controller is located within the handheld mechanism and is electrically connected to the leak detection mechanism and the switching mechanism. The device is equipped with at least an ultrasonic micro-leakage detection sensor and an ultrasonic global scanning sensor. The ultrasonic micro-leakage detection sensor and the ultrasonic global scanning sensor can be interchanged between the first sensor mounting position of the leak detection mechanism and the second sensor mounting position of the switching mechanism through the switching mechanism.

[0008] The leak detection mechanism, mounted on the handheld unit, is used for ultrasonic detection of SF6 gas leaks in GIS pipelines. Its core components include a first sensor mounting position and an attitude adjustment mechanism. The attitude adjustment mechanism actively drives the sensor mounted on the first sensor mounting position to adjust its position, effectively compensating for detection angle deviations caused by hand-held shaking during operation and ensuring that the sensor and the surface of the inspected pipeline maintain the optimal relative position. A switching mechanism, also mounted on the handheld unit, allows for quick sensor replacement under different detection requirements and includes a second sensor mounting position. The controller, located inside the handheld unit and electrically connected to the leak detection and switching mechanisms, coordinates the entire detection process and data processing. The device is equipped with at least an ultrasonic micro-leak detection sensor and an ultrasonic full-range rapid scanning sensor. These two sensors are automatically interchangeable between the first sensor mounting position in the leak detection mechanism and the second sensor mounting position in the switching mechanism via the switching mechanism. This design allows the device to flexibly adapt to different detection scenarios, enabling rapid, wide-area scanning using the ultrasonic full-range rapid scanning sensor for initial leak location, or switching to the ultrasonic micro-leak detection sensor for precise verification and quantitative analysis of suspicious points, thus significantly improving detection efficiency and accuracy.

[0009] In one optional implementation, the attitude adjustment mechanism includes a horizontal adjustment component and a pitch adjustment component; The horizontal adjustment assembly includes a side-rocking motor and a rotating base driven by the side-rocking motor via a transmission belt. The rotating base is fixedly mounted on the handheld mechanism via an extension plate. The pitch adjustment assembly includes at least one adjustment cylinder, the output end of which is connected to the tilt frame carrying the sensor via a linkage mechanism to drive the tilt frame to rotate relative to the rotating base.

[0010] The horizontal and vertical adjustment components work together to achieve precise control of the sensor's position and orientation. The horizontal adjustment component includes a rocker motor and a rotating base driven by the motor via a transmission belt. The rotating base is fixed to the handheld mechanism via an extension plate. When the rocker motor is activated, power is transmitted to the rotating base via the transmission belt, causing it and the sensor mounted on it to rotate horizontally, thus automatically adjusting the detection azimuth angle. The vertical adjustment component includes at least one adjusting cylinder. The output of this cylinder is connected to the tilt frame carrying the sensor via a linkage mechanism. The extension and retraction of the adjusting cylinder drives the linkage mechanism, which in turn rotates the tilt frame and the sensor on it around an axis to change the pitch angle. The combined horizontal and vertical adjustment components effectively overcome the unavoidable shaking and angular deviations during handheld operation, allowing the sensor to quickly and accurately adjust to the optimal detection posture when facing GIS pipelines in different positions and orientations, significantly improving the stability and reliability of leak detection.

[0011] In one optional embodiment, the linkage mechanism includes an extension block fixed to the output end of the adjusting electric cylinder and a rotating rod rotatably mounted on the extension block, the rotating rod being rotatably connected to the tilting frame.

[0012] In one optional embodiment, both the first sensor mounting position and the second sensor mounting position are provided with an elastic locking unit and a fixed locking unit. The elastic locking unit includes two upper elastic plates or two lower elastic plates arranged opposite to each other, used to clamp and fix the sensor from both sides; The fixing and locking unit includes an upper fixing ring or a lower fixing ring driven by an upper fixing electric cylinder or a lower fixing electric cylinder. The fixing ring is configured to be sleeved on the tail end of the sensor to achieve axial locking. The upper fixing ring is slidably installed with the inclined frame, and the lower fixing ring is slidably installed with the lower frame.

[0013] This composite fixing method, which combines elastic clamping with rigid locking, ensures both the convenience and alignment of sensor installation, as well as its stability under complex working conditions.

[0014] In one alternative implementation, the switching mechanism includes a drive assembly, a transmission assembly, and a docking frame driven by the transmission assembly; The drive assembly is configured to drive the docking frame to move such that the docking frame can simultaneously engage or disengage with a sensor located at a first sensor mounting position and a sensor located at a second sensor mounting position; and to drive the docking frame to rotate such that the positions of the two sensors are exchanged.

[0015] This integrated movement and rotation mechanism enables fully automatic interchange between the ultrasonic micro-leakage detection sensor and the ultrasonic full-range rapid scanning sensor between the working position and the reserve position, eliminating the need for manual disassembly and installation, and significantly improving detection efficiency and ease of operation.

[0016] In one alternative implementation, the drive assembly includes a rotary motor; The transmission assembly includes a rotating wheel driven by the rotating motor via a rotating transmission belt, a transmission shaft connected to the rotating wheel, a transmission gear fixed on the transmission shaft, and a mating gear meshing with the transmission gear. The mating gear is connected to the mating frame via a limiting sleeve and a sliding sleeve.

[0017] In one optional embodiment, the switching mechanism further includes a manual operation component, which includes a grip sleeve slidably mounted on the hand-held mechanism and a return spring disposed between the grip sleeve and the hand-held mechanism; Pulling the hand grip can cause the docking frame to engage with the sensor via a linkage, and coordinate with the start of the rotating motor.

[0018] In one optional embodiment, the linkage includes a pull rod fixed to the hand grip and a pull bracket fixed to the pull rod, the pull bracket being sleeved on the surface of the sliding sleeve.

[0019] In one optional embodiment, the handheld mechanism includes a handheld gun body, on which an extension post and a fixing post are fixedly mounted, and a battery is also provided; The sliding sleeve is fitted onto the surface of the protruding column, and the hand grip and return spring are fitted onto the surface of the fixed column.

[0020] In one alternative embodiment, a display screen is rotatably mounted on the handheld gun body.

[0021] In one optional embodiment, the handheld mechanism is provided with a knob, which is communicatively connected to the controller and is used to switch the working mode of the ultrasonic micro-leakage detection sensor and the ultrasonic global scanning sensor to a continuous working mode or an intermittent working mode.

[0022] In one alternative implementation, in the intermittent operating mode, a push-button switch on the handheld mechanism is configured to control the start and stop of the sensor. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of an ultrasonic detection device for SF6 gas leakage in GIS pipelines according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the handheld mechanism in an ultrasonic detection device for SF6 gas leakage in a GIS pipeline according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the handheld mechanism from another direction in an ultrasonic detection device for SF6 gas leakage in a GIS pipeline according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the leak detection mechanism in an ultrasonic leak detection device for SF6 gas in a GIS pipeline according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the leak detection mechanism in an ultrasonic leak detection device for SF6 gas in a GIS pipeline according to an embodiment of the present invention, from another perspective. Figure 6 This is a schematic diagram of the switching mechanism in an ultrasonic detection device for SF6 gas leakage in a GIS pipeline according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the switching mechanism in another direction of an ultrasonic detection device for SF6 gas leakage in a GIS pipeline according to an embodiment of the present invention; Figure 8 This is a schematic diagram of another direction of the switching mechanism in an ultrasonic detection device for SF6 gas leakage in a GIS pipeline according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures: 101. Handheld gun body; 102. Display screen; 103. Extending post; 104. Fixing post; 105. Knob; 106. Push switch; 107. Battery; 108. Controller; 201. Extended plate; 202. Side-rocking motor; 203. Transmission belt; 204. Rotating seat; 205. Inclined frame; 206. Adjusting electric cylinder; 207. Extended block; 208. Rotating rod; 209. Upper elastic sheet; 210. Ultrasonic micro-leakage precision sensor; 211. Upper fixing electric cylinder; 212. Upper fixing ring; 301. Handheld cylinder; 302. Pull rod; 303. Return spring; 304. Lower frame; 305. Lower fixed electric cylinder; 306. Lower fixed ring; 307. Ultrasonic global scanning sensor; 308. Lower elastic sheet; 309. Rotating motor; 310. Rotating transmission belt; 311. Transmission shaft; 312. Transmission gear; 313. Sliding sleeve; 314. Pulling frame; 315. Limiting sleeve; 316. Connecting gear; 317. Connecting frame; 318. Rotating wheel. Detailed Implementation

[0026] 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.

[0027] Gas-insulated metal-enclosed switchgear (GIS) is widely used in high-voltage power transmission and distribution systems due to its compact structure, high reliability, and low maintenance requirements. GIS equipment and pipelines typically use sulfur hexafluoride (SF6) as the insulation and arc-quenching medium, whose excellent insulation performance and arc-quenching capability ensure efficient and stable operation. However, during long-term operation, GIS equipment and pipelines may experience SF6 gas leakage due to vibration, seal aging, and inadequate installation techniques. SF6 gas leakage not only leads to a decline in equipment insulation performance, affecting the safe and stable operation of the power system, but also has a serious environmental impact due to its high global warming potential. Therefore, regular and efficient SF6 gas leakage detection of GIS equipment and pipelines is of great significance.

[0028] Traditional SF6 gas leak detection methods mainly include the soap bubble method, infrared imaging method, laser leak detection method, and acoustic detection method. The soap bubble method is simple to operate but inefficient and difficult to detect tiny leaks; the infrared imaging method can achieve non-contact detection, but it is greatly affected by ambient temperature and background radiation, and the equipment cost is high; the laser leak detection method has high sensitivity, but it is also expensive and has strict requirements for the operating environment.

[0029] In recent years, leak detection technology based on ultrasonic principles has gradually become a research hotspot due to its advantages such as fast response speed, strong anti-interference ability, and applicability to harsh environments. Ultrasonic detection captures the ultrasonic signals generated during gas leaks to locate and quantitatively analyze the leak point, making it particularly suitable for detecting high-pressure gas leaks.

[0030] However, existing ultrasonic testing equipment still has some limitations. First, most devices are single-function, typically equipped with only a single sensor, making it difficult to balance detection range and accuracy. For example, full-range scanning sensors are suitable for quickly locating leak areas, but lack sensitivity for minute leaks; while high-precision sensors can accurately identify minute leaks, their detection efficiency is low, making them unsuitable for large-scale screening. Second, traditional equipment relies on manual hand-held operation during testing, which is prone to sensor position deviations due to personnel shaking or movement, affecting the accuracy and consistency of the test results.

[0031] The following is combined Figures 1 to 8 The following describes embodiments of the present invention.

[0032] According to an embodiment of the present invention, an ultrasonic detection device for SF6 gas leaks in GIS pipelines is provided, comprising a handheld mechanism, a leak detection mechanism, a switching mechanism, and a controller 108. The leak detection mechanism is disposed on the handheld mechanism and is used for ultrasonic detection of SF6 gas leaks in GIS pipelines. The leak detection mechanism includes a first sensor mounting position and an attitude adjustment mechanism, the attitude adjustment mechanism being configured to drive the sensor mounted on the first sensor mounting position to adjust its position. The switching mechanism is disposed on the handheld mechanism and is used for replacing the sensor. The switching mechanism includes a second sensor mounting position. The controller 108 is disposed within the handheld mechanism and is electrically connected to the leak detection mechanism and the switching mechanism. The device is equipped with at least an ultrasonic micro-leakage detection sensor 210 and an ultrasonic global scanning sensor 307, which can be interchanged between the first sensor mounting position of the leak detection mechanism and the second sensor mounting position of the switching mechanism via the switching mechanism.

[0033] According to an embodiment of the present invention, a leak detection mechanism is mounted on a handheld mechanism for ultrasonic detection of SF6 gas leaks in GIS pipelines. Its core components include a first sensor mounting position and an attitude adjustment mechanism. The attitude adjustment mechanism actively drives the sensor mounted on the first sensor mounting position to adjust its position, effectively compensating for detection angle deviations caused by hand-held shaking during operation, ensuring that the sensor and the surface of the pipeline being inspected always maintain the optimal relative position. A switching mechanism is also mounted on the handheld mechanism for quickly changing sensors under different detection requirements; it has a second sensor mounting position internally. A controller 108 is located inside the handheld mechanism and electrically connected to the leak detection mechanism and the switching mechanism, responsible for coordinating the entire detection process and data processing. The controller can directly use existing control equipment. The detection equipment is equipped with at least an ultrasonic micro-leakage detection sensor 210 and an ultrasonic full-range rapid scanning sensor 307. The two are automatically interchanged between the first sensor mounting position of the leak detection mechanism and the second sensor mounting position of the switching mechanism through a switching mechanism. This design allows the equipment to flexibly adapt to different detection scenarios. It can use the ultrasonic micro-leakage detection sensor 210 for rapid and wide-range scanning to initially locate the leak area, or switch to the ultrasonic full-range rapid scanning sensor 307 for precise verification and quantitative analysis of suspicious points, thereby significantly improving detection efficiency and accuracy.

[0034] In one embodiment, such as Figure 4 and Figure 5 As shown, the attitude adjustment mechanism includes a horizontal adjustment component and a pitch adjustment component; the horizontal adjustment component includes a rocker motor 202 and a rotating seat 204 driven by the rocker motor 202 through a transmission belt 203, the rotating seat 204 being mounted on the handheld mechanism via an extension plate 201; the pitch adjustment component includes at least one adjusting electric cylinder 206, the output end of the adjusting electric cylinder 206 being connected to the tilt frame 205 carrying the sensor via a linkage mechanism to drive the tilt frame 205 to rotate relative to the rotating seat 204.

[0035] Specifically, the horizontal adjustment component and the pitch adjustment component work together to achieve precise control of the sensor's pose. The horizontal adjustment component includes a roll motor 202 and a rotating seat 204 driven by the roll motor 202 via a transmission belt 203. An extension plate 201 is fixedly mounted on the handheld gun body 101, and the rotating seat 204 is rotatably mounted on the extension plate 201. The roll motor 202 drives the rotating seat 204 to rotate via the transmission belt 203. When the roll motor 202 is activated, it transmits power to the rotating seat 204 via the transmission belt 203, causing it and the sensor mounted on it to rotate horizontally, thereby achieving automatic adjustment of the detection azimuth angle. The pitch adjustment component includes at least one adjusting electric cylinder 206. The output end of the adjusting electric cylinder 206 is connected to the tilt frame 205 carrying the sensor via a linkage mechanism. By adjusting the extension and retraction of the adjusting electric cylinder 206, the linkage mechanism is driven to move, thereby causing the tilt frame 205 and the sensor on it to rotate around axis Q in a pitch angle. The combination of horizontal and vertical adjustment components effectively overcomes the unavoidable shaking and angle deviation during handheld operation, enabling the sensor to quickly and accurately adjust to the optimal detection posture when facing GIS pipeline detection surfaces in different positions and orientations, significantly improving the stability and reliability of leak detection.

[0036] In one embodiment, the linkage mechanism includes an extension block 207 fixed to the output end of the adjusting electric cylinder 206 and a rotating rod 208 rotatably mounted on the extension block 207, the rotating rod 208 being rotatably connected to the tilting frame 205.

[0037] This linkage mechanism forms the core of the power transmission for pitch adjustment: when the output end of the adjusting electric cylinder 206 extends or retracts, it directly drives the extended block 207 fixed on it to move linearly; this linear motion is converted into a mechanical action with a preset trajectory by rotating the rod 208 mounted on the extended block 207; since the other end of the rod 208 is rotatably connected to the tilting frame 205, and the rod 208 is tilted at the bottom of the tilting frame 205, this action is ultimately converted into a pushing and pulling action on the tilting frame 205, thereby precisely controlling the rotation of the tilting frame 205 around its pivot point Q, realizing flexible and stable adjustment of the sensor's pitch angle. The entire transmission chain, through the linear drive of the extended block 207, the motion conversion of the rod 208, and the final execution of the tilting frame 205, reliably converts the linear output of the electric cylinder into the pitch rotation required by the sensor. Its structure is compact, the force transmission is efficient, and it effectively ensures the response speed and positioning accuracy of attitude adjustment.

[0038] In one embodiment, both the first sensor mounting position and the second sensor mounting position are provided with an elastic locking unit and a fixed locking unit; the elastic locking unit includes two upper elastic pieces 209 or two lower elastic pieces 308 arranged opposite each other for clamping and fixing the sensor from both sides; the fixed locking unit includes an upper fixing ring 212 or a lower fixing ring 306 driven by an upper fixing electric cylinder 211 or a lower fixing electric cylinder 305, the fixing ring being configured to be sleeved on the tail end of the sensor to achieve axial locking; wherein, the upper fixing ring 212 is slidably mounted with the inclined frame 205, and the lower fixing ring 306 is slidably mounted with the lower frame 304.

[0039] Both the first and second sensor mounting positions are equipped with a cooperating elastic locking unit and a fixed locking unit, which together constitute a composite fixing system for the sensor.

[0040] In the first sensor mounting position, a cooperating elastic locking unit and a fixed locking unit are provided. The elastic locking unit consists of two opposing upper elastic plates 209, which flexibly clamp the sensor from both sides through their own elastic deformation, achieving initial centering and radial fixation of the sensor. The fixed locking unit includes an upper fixing ring 212 driven by an upper fixing electric cylinder 211. The upper fixing ring 212 is configured to be sleeved on the tail end of the sensor, and through sliding installation cooperation with the tilting frame 205, it ensures that the sensor can move linearly along a precise trajectory under the drive of the electric cylinder.

[0041] In the second sensor mounting position, a corresponding elastic locking unit and a fixed locking unit are also provided. The elastic locking unit here consists of two opposing lower elastic plates 308, with two lower elastic plates 308 positioned above and below the lower frame 304, clamping and fixing the sensor from both sides using the same principle. The fixed locking unit includes a lower fixing cylinder 305 fixedly mounted on the lower frame 304 and a lower fixing ring 306 driven by the lower fixing cylinder 305. The lower fixing ring 306 is configured to fit over the tail end of the sensor and, through sliding engagement with the lower frame 304, ensures precise execution of the axial locking action. The lower frame 304 is mounted below the handheld gun body 101.

[0042] This composite fixing method, which combines elastic clamping with rigid locking, ensures both the convenience and alignment of sensor installation, as well as its stability under complex working conditions.

[0043] In one embodiment, the switching mechanism includes a drive assembly, a transmission assembly, and a docking frame 317 driven by the transmission assembly; the drive assembly is configured to drive the docking frame 317 to move such that the docking frame 317 can simultaneously engage or disengage with a sensor located at a first sensor mounting position and a sensor located at a second sensor mounting position; and to drive the docking frame 317 to rotate such that the positions of the two sensors are exchanged.

[0044] The switching mechanism comprises a drive assembly, a transmission assembly, and a docking frame 317 driven by the transmission assembly. These three components work together to achieve automatic sensor exchange. The drive assembly provides power for the entire switching process, which is precisely transmitted to the docking frame 317 via the transmission assembly. This switching mechanism has two key actions: First, the docking frame 317 is driven to produce precise linear movement, enabling it to simultaneously engage or disengage with two sensors located at the first and second sensor mounting positions, respectively, achieving reliable gripping and release. Second, after the docking frame 317 engages with the sensor, the drive assembly further drives the docking frame 317 to rotate stably by 180 degrees via the transmission assembly, thereby precisely exchanging the mounting positions of the two sensors. This integrated movement and rotation action enables fully automatic interchange between the ultrasonic micro-leakage detection sensor 210 and the ultrasonic full-range rapid scanning sensor 307 between the working position and the reserve position, eliminating the need for manual disassembly and installation, significantly improving detection efficiency and operational convenience.

[0045] In one embodiment, the drive assembly includes a rotary motor 309; the transmission assembly further includes a rotary wheel 318 driven by the rotary motor 309 via a rotary transmission belt 310, a transmission shaft 311 connected to the rotary wheel 318, a transmission gear 312 fixed on the transmission shaft 311, and a mating gear 316 meshing with the transmission gear 312. The mating gear 316 is connected to the mating frame 317 via a limiting sleeve 315 and a sliding sleeve 313.

[0046] The working process of the transmission system is as follows: the rotating motor 309 transmits power to the rotating wheel 318 through the rotating transmission belt 310, causing the rotating wheel 318 to rotate; the transmission shaft 311 connected to the rotating wheel 318 rotates accordingly, and drives the transmission gear 312 fixed on it to rotate; the transmission gear 312 drives the mating gear 316 that meshes with it to rotate; a sliding sleeve 313 is fitted on the protruding column 103 in the hand-held mechanism, a limit sleeve 315 is fixedly installed on the sliding sleeve 313, the mating gear 316 is fixedly installed on the limit sleeve 315, and a mating frame 317 is fixedly installed on the sliding sleeve 313.

[0047] Since the docking gear 316 is connected to the docking frame 317 through the limiting sleeve 315 and the sliding sleeve 313, it transmits the rotational motion to the docking frame 317. This transmission design enables the docking frame 317 to achieve rotational motion through the gear system, thereby accurately exchanging the positions of the two sensors.

[0048] On the other hand, a rotating wheel 318 is rotatably mounted on the handheld gun body 101. A stop block can be set on the inner wall of the inner hole of the rotating wheel 318. The transmission shaft 311 has a strip-shaped groove along its axial direction. The stop block slides and limits the movement within the strip-shaped groove, so that the rotating wheel 318 can drive the transmission shaft 311 to rotate synchronously, while the transmission shaft 311 can slide relative to the rotating wheel 318 along its axial direction. This design achieves axial movement through the sliding engagement of the transmission shaft 311 within the rotating wheel 318, allowing the docking frame 317 to approach or move away from the sensor to complete engagement and disengagement.

[0049] In one embodiment, the switching mechanism further includes a manual operation component, which includes a grip tube 301 slidably mounted on the hand-held mechanism and a reset spring 303 disposed between the grip tube 301 and the hand-held mechanism; pulling the grip tube 301 can drive the docking frame 317 to engage with the sensor through the linkage.

[0050] When the operator pulls the hand grip 301 along the axis, this manual action is transmitted through the linkage and directly drives the docking frame 317 to move, so that the docking frame 317 engages with the sensor, preparing for subsequent position exchange; when the sensor exchange process is completed and the hand grip 301 is released, the reset spring 303 uses its stored elastic potential energy to drive the hand grip 301 to automatically slide back to the initial position, thereby realizing the reset of the manual operation component.

[0051] In one embodiment, the linkage includes a pull rod 302 fixed to the hand grip 301 and a pull frame 314 fixed to the pull rod 302, the pull frame 314 being sleeved on the sliding sleeve 313.

[0052] When it is necessary to replace the ultrasonic microleakage detection sensor 210 and the ultrasonic global scanning sensor 307, manually pull the handle 301 to slide along the fixed post 104. The return spring 303 is compressed, and the handle 301 drives the pull frame 314 to move via the pull rod 302. After the pull frame 314 separates from the docking frame 317, the control motor 309 starts. The rotation motor 309 drives the rotating wheel 318 to rotate via the rotation transmission belt 310. The rotating wheel 318 drives the transmission shaft 311 and the transmission gear 312 to rotate. The transmission gear 312 drives the docking gear 316 to rotate. The docking gear 316 drives the limiting sleeve 315, the sliding sleeve 313, and the docking frame 317 to rotate 90 degrees, so that the two docking holes of the docking frame 317 reach the ultrasonic microleakage detection area. The puller continues to pull the puller 314 in front of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307. When the puller 314 contacts the limiting sleeve 315, the puller 314 drives the limiting sleeve 315, the docking gear 316, the docking frame 317, the transmission gear 312, and the transmission shaft 311 to move together. The transmission shaft 311 slides relative to the rotating wheel 318, so that the two holes of the docking frame 317 are respectively fitted onto the heads of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307. Then, the lower fixing cylinder 305 retracts, driving the lower fixing ring 306 away from the ultrasonic global scanning sensor 307, and the upper fixing cylinder 211 extends, driving the upper fixing ring 212 away from the ultrasonic micro-leakage detection sensor 210. Then, the rotating motor 309 drives the sensor. The docking frame 317 rotates 180 degrees, moving the ultrasonic micro-leakage detection sensor 210 between the lower elastic plates 308 and the ultrasonic global scanning sensor 307 between the upper elastic plates 209. Because the upper and lower elastic plates 209 and 308 are elastic, when the docking frame 317 rotates the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307, a slight deformation occurs in the upper and lower elastic plates 209 and 308. This allows the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307 to smoothly leave the space between the upper and lower elastic plates 209 and 308, and the ultrasonic micro-leakage detection sensor 210 to smoothly enter the space between the lower elastic plates 308. The ultrasonic global scanning... Sensor 307 smoothly enters between the upper elastic plates 209. Then, the lower fixing cylinder 305 extends, causing the lower fixing ring 306 to fit onto the tail end of the ultrasonic micro-leakage detection sensor 210. The upper fixing cylinder 211 retracts, causing the upper fixing ring 212 to fit onto the tail end of the ultrasonic global scanning sensor 307. Then, the grip sleeve 301 is released, and the return spring 303 rebounds, causing the grip sleeve 301, pull rod 302, and pulling frame 314 to return to their original positions. When the pulling frame 314 contacts the docking frame 317, it pushes the docking frame 317, sliding sleeve 313, limiting sleeve 315, docking gear 316, transmission gear 312, and transmission shaft 311 outwards, causing the docking frame 317 to disengage from the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307.Then, rotating motor 309 drives docking frame 317 to rotate 90 degrees to reset, preventing docking frame 317 from blocking ultrasonic micro-leakage detection sensor 210.

[0053] Specifically, such as Figure 8 As shown, the pulling frame 314 is sleeved on the surface of the limiting sleeve 315. The limiting sleeve 315 has an annular protrusion on the side away from the docking frame 317, so that the pulling frame 314 can abut against this annular protrusion to drive the limiting sleeve 315 to move synchronously.

[0054] Meanwhile, in order to enable the movement of the limiting sleeve 315 to synchronously drive the movement of the transmission gear 312, there are two annular protrusions. The two annular protrusions extend downward to the two sides of the transmission gear 312 so as to drive the movement of the transmission gear 312 through the two annular protrusions.

[0055] In one embodiment, the handheld mechanism includes a handheld gun body 101, on which an extension post 103 and a fixed post 104 are fixedly mounted. A battery 107 is also disposed on the handheld gun body 101. The handheld mechanism, including the handheld gun body 101, provides an ergonomic grip for the operator. The extension post 103 and fixed post 104, fixedly mounted on the handheld gun body 101, together form the core mounting framework inside the device: the extension post 103 mainly supports and guides the moving parts in the switching mechanism; that is, the sliding sleeve 313 is fitted onto the surface of the extension post 103 to ensure its precise movement along a predetermined trajectory. The fixed post 104 provides a reliable sliding mounting base for the handgrip 301 in the manual operation assembly and accommodates the return spring 303, ensuring smooth manual operation and reliable automatic reset. In addition, a battery 107 is also provided on the handheld gun body 101. The battery 107 is integrated inside the gun body and serves as an independent power supply unit for the device. It provides a continuous and stable power supply to all power modules, including the drive components, controller 108 and various sensors, thereby ensuring that the entire detection equipment can still complete the inspection task at the substation site for a long time with high mobility when disconnected from the external power supply.

[0056] In one embodiment, a display screen 102 is rotatably mounted on the handheld gun body 101. This rotatable connection structure allows the display screen 102 to be angled relative to the handheld gun body 101. The operator can rotate the display screen 102 to the most suitable viewing angle according to the actual detection posture and line of sight, thus enabling clear and intuitive reading of detection data and equipment status under various detection postures. This design greatly improves the convenience and visibility of human-computer interaction, eliminating the need for the operator to adjust their grip or forcibly move their body position to view the screen, effectively reducing visual and physical fatigue during long-term operation, and ensuring the continuity of the detection process and operational comfort.

[0057] In one embodiment, a knob 105 is provided on the handheld mechanism. The knob 105 is communicatively connected to the controller 108 and is used to switch the operating modes of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307 between continuous and intermittent operating modes. By rotating the knob 105, the operator can flexibly select the operating mode according to the on-site testing requirements: in continuous operating mode, the selected sensor will remain in operation, suitable for situations requiring long-term continuous monitoring or large-area rapid scanning; in intermittent operating mode, the sensor is activated only when needed. This mode saves equipment energy, extends operating time, and is suitable for detection scenarios involving precise point measurement or interval sampling. This mode switching mechanism via the knob 105 allows operators to quickly switch operating modes without complex menu settings or external devices, greatly enhancing the flexibility and ease of operation of the equipment in field applications. Simultaneously, the precise management by the controller 108 ensures the stability and reliability of the sensor operation in different modes. Existing control equipment capable of mode switching can be selected.

[0058] In one embodiment, in intermittent operation mode, a push-button switch 106 on the handheld mechanism is configured to control the start and stop of the sensor. In this mode, the sensor does not operate continuously but is started and stopped by the operator's active control: when a specific test is required, the operator presses the push-button switch 106, and the controller 108 receives the signal and starts the sensor currently installed on the leak detection mechanism; when the test is completed or a pause is needed, the operator releases the push-button switch 106, and the sensor stops working. This "press to test, release to stop" control method allows the operator to precisely control the timing and duration of each test, effectively avoiding sensor idling, saving power consumption, and extending the battery 107's battery life. More importantly, it allows the operator to precisely align the sensor with the suspected leak point before starting the test, effectively avoiding invalid data or interference signals generated during the movement to find the test location, thereby significantly improving the relevance and reliability of the test data. This is particularly suitable for applications requiring precise location and quantitative analysis of specific points. The aforementioned knob 105 and push switch 106 can select existing control devices, which are used to control the operation of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307.

[0059] One specific implementation of the ultrasonic detection equipment for SF6 gas leakage in GIS pipelines provided in this embodiment is as follows: Initial preparation and mode selection: The operator holds the handheld gun 101, whose built-in battery 107 powers the device. By rotating the knob 105 on the handheld gun 101, the operator can select the operating mode (continuous or intermittent) of the ultrasonic global rapid scanning sensor 307 or the ultrasonic micro-leakage detection sensor 210. In intermittent mode, the sensor is started and stopped instantly by pressing the switch 106.

[0060] Full-area rapid scanning phase: In this phase, the ultrasonic micro-leakage detection sensor 210 is installed on the first sensor mounting position of the leak detection mechanism and locked in place by the upper elastic plate 209 and the upper fixing ring 212. Upon startup, the attitude adjustment mechanism begins operation: the side-rocking motor 202 of the horizontal adjustment component drives the rotating seat 204 to swing horizontally via the transmission belt 203, while the adjusting cylinder 206 of the pitch adjustment component drives the tilting frame 205 to pitch via a linkage mechanism (including the extension block 207 and the rotating rod 208). This combined motion in two directions automatically compensates for hand-held shaking, enabling the sensor to perform stable and rapid scanning of a large area of ​​GIS pipelines, and initially identify suspected leak areas.

[0061] Sensor switching phase: Manually pull the handle 301 to slide along the fixed post 104, compressing the return spring 303. The handle 301 drives the pull frame 314 to move via the pull rod 302. When the pull frame 314 separates from the docking frame 317, the control motor 309 starts. The motor 309 drives the rotating wheel 318 to rotate via the rotating transmission belt 310. The rotating wheel 318 drives the transmission shaft 311 and the transmission gear 312 to rotate. The transmission gear 312 drives the docking gear 316 to rotate. The docking gear 316 drives the limiting sleeve 315, the sliding sleeve 313, and the docking frame 317 to rotate 90 degrees, so that the two docking holes of the docking frame 317 reach the front of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307. Pulling the pull frame 314 causes it to contact the limiting sleeve 315. This movement then drives the limiting sleeve 315, the docking gear 316, the docking frame 317, the transmission gear 312, and the transmission shaft 311 to move together. The transmission shaft 311 slides relative to the rotating wheel 318, allowing the two holes of the docking frame 317 to fit onto the heads of the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307, respectively. Subsequently, the lower fixing cylinder 305 retracts, causing the lower fixing ring 306 to move away from the ultrasonic global scanning sensor 307. The upper fixing cylinder 211 extends, causing the upper fixing ring 212 to move away from the ultrasonic micro-leakage detection sensor 210. Then, the rotating motor 309 drives the docking frame 317 to rotate 180 degrees, allowing the ultrasonic... The micro-leakage detection sensor 210 moves between the lower elastic plates 308, and the ultrasonic global scanning sensor 307 moves between the upper elastic plates 209. Because the upper elastic plates 209 and lower elastic plates 308 are elastic, when the docking frame 317 rotates the ultrasonic micro-leakage detection sensor 210 and ultrasonic global scanning sensor 307, the upper elastic plates 209 and lower elastic plates 308 will undergo slight deformation. This allows the ultrasonic micro-leakage detection sensor 210 and ultrasonic global scanning sensor 307 to smoothly leave the space between the upper elastic plates 209 and lower elastic plates 308, and the ultrasonic micro-leakage detection sensor 210 to smoothly enter the space between the lower elastic plates 308, and the ultrasonic global scanning sensor 307 to smoothly enter the space between the upper elastic plates 209. Subsequently... The lower fixing cylinder 305 extends, causing the lower fixing ring 306 to fit onto the tail end of the ultrasonic micro-leakage detection sensor 210. The upper fixing cylinder 211 retracts, causing the upper fixing ring 212 to fit onto the tail end of the ultrasonic global scanning sensor 307. Then, the hand grip 301 is released, and the return spring 303 rebounds, causing the hand grip 301, pull rod 302, and pulling frame 314 to return to their original positions. When the pulling frame 314 contacts the docking frame 317, it pushes the docking frame 317, sliding sleeve 313, limiting sleeve 315, docking gear 316, transmission gear 312, and transmission shaft 311 to move outward, causing the docking frame 317 to disengage from the ultrasonic micro-leakage detection sensor 210 and the ultrasonic global scanning sensor 307. Then, the rotating motor 309 drives the docking frame 317 to rotate 90 degrees to return to its original position.To prevent the docking mount 317 from obstructing the ultrasonic full-range high-speed scanning sensor 307.

[0062] Micro-leak precise location stage: After switching, the ultrasonic micro-leak precision sensor 210 is positioned on the leak detection mechanism. The attitude adjustment mechanism performs fine-tuning of the position again, ensuring the sensor probe is precisely aligned with the suspected leak point. The operator can activate the intermittent working mode and perform precise measurements and data acquisition by pressing the push switch 106, achieving precise location and quantitative analysis of micro-leak points.

[0063] The device ensures detection stability through automatic attitude adjustment of the leak detection mechanism, achieves rapid switching of functional modes through fully automatic sensor exchange of the switching mechanism, and forms a complete, efficient, and reliable leak detection workflow from large-area rapid initial screening to precise point verification through controller 108 for coordinated control of working modes and various execution components.

[0064] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An ultrasonic detection device for SF6 gas leaks in GIS pipelines, characterized in that, include: Handheld mechanism; A leak detection mechanism, mounted on the handheld mechanism, is used to perform ultrasonic detection of SF6 gas leaks in GIS pipelines. The leak detection mechanism includes a first sensor mounting position and an attitude adjustment mechanism. The attitude adjustment mechanism is configured to drive the sensor mounted on the first sensor mounting position to adjust its position and attitude. A switching mechanism, disposed on the handheld mechanism, is used to replace the sensor; the switching mechanism includes a second sensor mounting position. as well as The controller (108) is disposed in the handheld mechanism and electrically connected to the leak detection mechanism and the switching mechanism; The device is equipped with at least an ultrasonic micro-leakage detection sensor (210) and an ultrasonic global scanning sensor (307). The ultrasonic micro-leakage detection sensor (210) and the ultrasonic global scanning sensor (307) can be interchanged between the first sensor mounting position of the leak detection mechanism and the second sensor mounting position of the switching mechanism through the switching mechanism.

2. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 1, characterized in that, The attitude adjustment mechanism includes a horizontal adjustment component and a pitch adjustment component; The horizontal adjustment assembly includes a side-rocking motor (202) and a rotating seat (204) driven by the side-rocking motor (202) via a transmission belt (203). The rotating seat (204) is mounted on the hand-held mechanism via an extension plate (201). The pitch adjustment assembly includes at least one adjustment cylinder (206), the output end of which is connected to the tilt frame (205) carrying the sensor via a linkage mechanism to drive the tilt frame (205) to rotate relative to the rotating seat (204).

3. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 2, characterized in that, The linkage mechanism includes an extension block (207) fixed to the output end of the regulating electric cylinder (206) and a rotating rod (208) rotatably mounted on the extension block (207). The rotating rod (208) is rotatably connected to the tilting frame (205).

4. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 1 or 2, characterized in that, Both the first sensor mounting position and the second sensor mounting position are provided with an elastic locking unit and a fixed locking unit; The elastic locking unit includes two upper elastic plates (209) or two lower elastic plates (308) arranged opposite to each other for clamping and fixing the sensor from both sides; The fixing and locking unit includes an upper fixing ring (212) or a lower fixing ring (306) driven by an upper fixing electric cylinder (211) or a lower fixing electric cylinder (305), the fixing ring being configured to be sleeved on the tail end of the sensor to achieve axial locking; The upper fixing ring (212) is slidably installed with the inclined frame (205), and the lower fixing ring (306) is slidably installed with the lower frame (304).

5. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 4, characterized in that, The switching mechanism includes a drive assembly, a transmission assembly, and a docking frame (317) driven by the transmission assembly. The drive assembly is configured to drive the docking frame (317) to move such that the docking frame (317) can simultaneously engage or disengage with a sensor located at a first sensor mounting position and a sensor located at a second sensor mounting position; and to drive the docking frame (317) to rotate such that the positions of the two sensors are exchanged.

6. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 5, characterized in that, The drive assembly includes a rotary motor (309); The transmission assembly includes a rotating wheel (318) driven by the rotating motor (309) via a rotating transmission belt (310), a transmission shaft (311) connected to the rotating wheel (318), a transmission gear (312) fixed on the transmission shaft (311), and a mating gear (316) meshing with the transmission gear (312). The mating gear (316) is connected to the mating frame (317) via a limiting sleeve (315) and a sliding sleeve (313).

7. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 6, characterized in that, The switching mechanism further includes a manual operation component, which includes a hand grip (301) slidably mounted on the hand-held mechanism and a return spring (303) disposed between the hand grip (301) and the hand-held mechanism. Pulling the hand grip (301) can cause the docking frame (317) to engage with the sensor via the linkage.

8. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 7, characterized in that, The linkage includes a pull rod (302) fixed to the hand grip (301) and a pull frame (314) fixed to the pull rod (302), the pull frame (314) being sleeved on the surface of the sliding sleeve (313).

9. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 8, characterized in that, The handheld mechanism includes a handheld gun body (101), on which an extension post (103) and a fixing post (104) are fixedly installed, and a battery (107) is also provided on the handheld gun body (101). The sliding sleeve (313) is sleeved on the surface of the protruding post (103), and the hand grip (301) and the return spring (303) are sleeved on the surface of the fixed post (104).

10. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 9, characterized in that, The handheld gun body (101) is rotatably mounted with a display screen (102).

11. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 9, characterized in that, The handheld mechanism is provided with a knob (105), which is communicatively connected to the controller (108) and is used to switch the working mode of the ultrasonic micro-leakage detection sensor (210) and the ultrasonic global scanning sensor (307) to a continuous working mode or an intermittent working mode.

12. The ultrasonic detection equipment for SF6 gas leakage in GIS pipelines according to claim 8, characterized in that, In the intermittent working mode, the push switch (106) provided on the handheld mechanism is configured to control the start and stop of the sensor.

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