A partial discharge on-line detection device for power transmission and transformation bus

Abstract

The present application relates to a kind of partial discharge on-line detection device of power transmission bus, it is related to power transmission equipment condition monitoring technical field.The opening-closing type sensor jaw body is symmetrically provided with arc-shaped sliding groove on the upper surface, and the front surface of opening-closing type sensor jaw body is fixedly installed with radio frequency socket, and four arc-shaped sliding blocks are slidably connected in the two arc-shaped sliding grooves.The device can be linked to adjust the spacing and contact area of clamping pad by clamping adaptive adjustment assembly, adapt to multi-specification power transmission bus, and the arc-shaped sliding block can be reliably locked, improve clamping stability, while with the help of universal ball can be self-adapting correction angle, cooperate with buffer compensation structure can be self-adapting bus thermal expansion and cold shrink, stable clamping pressure, reduce detection deviation, and the anti-loose clamping assembly of radio frequency plug is used to realize interface anti-loose stable connection, and rely on mechanical linkage to realize dynamic adaptation, guarantee mechanism operation smooth and detection signal stable.

Description

Technical Field

[0001] This invention relates to the field of power transmission and transformation equipment condition monitoring technology, specifically to an online detection device for partial discharge of power transmission and transformation busbars. Background Technology

[0002] Openable partial discharge online detection sensors are widely used in switchgear and busbar compartment partial discharge online monitoring scenarios due to their advantages of not requiring power outages, allowing for live installation, and strong adaptability. The openable sensor clamp adopts an openable, split structure, allowing it to be directly fitted onto the outside of the busbar during operation without disconnecting the busbar circuit. The clamp integrates a signal acquisition probe, which simultaneously acquires high-frequency electromagnetic waves, discharge pulses, and ultrasonic signals generated by partial discharge on the busbar through electromagnetic coupling and ultrasonic sensing. It converts the weak partial discharge signal into a recognizable electrical signal, which is then conditioned and transmitted to the detection terminal to determine the condition of the busbar insulation.

[0003] Transmission busbars are core equipment for power transmission in power systems. During long-term operation, they are prone to defects such as insulation aging, localized air gaps, and creepage, leading to partial discharge phenomena. If these defects are not detected and addressed promptly, they can cause major power accidents such as insulation breakdown and busbar short circuits. Open-type online partial discharge detection sensors are widely used in switchgear and busbar compartment partial discharge monitoring due to their advantages of not requiring power outages, allowing for live installation, and strong adaptability. However, existing online partial discharge detection devices have the following drawbacks in practical use: On the one hand, the existing busbar clamping pads are mostly fixedly installed. When adapting to busbars of different outer diameters, the spacing between the pads cannot be adjusted adaptively, and the clamping contact area cannot change with the busbar specifications. When the outer diameter of the busbar is large, the clamping contact area is too small, which easily leads to stress concentration and reduces clamping stability. When the outer diameter of the busbar is small, the pad fit is not good, and there is a possibility of clamping misalignment. On the other hand, the clamping spring at the RF plug is a fixed pre-tightening structure and has no mechanical linkage with the busbar clamping mechanism. When adjusting the busbar clamping state, the spring compression cannot be changed synchronously. When assembling a large-specification busbar, the clamp opening will cause the cable to exert a pulling and torsional force on the RF plug. The fixed clamping force is difficult to adapt to the increased load, and the plug is at risk of loosening and poor contact. When assembling a small-specification busbar, the load is small, but the clamping force remains unchanged, which may squeeze and damage the plug shell.

[0004] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0005] The purpose of this invention is to provide an online detection device for partial discharge of power transmission and transformation busbars to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an online detection device for partial discharge of power transmission and transformation busbars, comprising an openable sensor clamp body, wherein the upper surface of the openable sensor clamp body is symmetrically provided with arc-shaped sliding grooves, and an RF socket is fixedly installed on the front side of the openable sensor clamp body; four arc-shaped sliders are slidably connected inside the two arc-shaped sliding grooves, and a fixing seat is bolted to the upper surface of the arc-shaped sliders; and clamping pads are provided on the opposite sides of the four fixing seats. It also includes four threaded rods, each of which is bearing-connected to one side inside four fixed seats. A threaded sleeve is threaded to the outer side of one end of each threaded rod, and a deep groove is formed at the end of the threaded sleeve away from the threaded rod. A connecting rod is slidably connected inside the deep groove on the threaded sleeve, and a return spring is installed between one end of the connecting rod and the inner wall of the deep groove. The end of the connecting rod away from the return spring is movably connected to the side of the clamping pad through a universal ball joint. The clamping pad and the arc-shaped slider are equipped with clamping adapter adjustment components inside, and the RF socket and the opening and closing sensor clamp are equipped with anti-loosening clamping components inside.

[0007] Preferably, each pair of arc-shaped sliders is symmetrically distributed inside the arc-shaped groove, the end of the threaded rod away from the threaded sleeve extends out of the outer surface of the fixed seat, and the threaded sleeve and the fixed seat are in a sliding limiting fit.

[0008] Preferably, a vertical plate is slidably connected to one side of the arc-shaped slider, and a limiting block is slidably connected to the left side of the arc-shaped slider below the vertical plate. The right side of the limiting block is hinged to the bottom of the vertical plate through a hinge plate. Several limiting grooves are formed at equal angles on the outer peripheral sidewall of the arc-shaped slide.

[0009] Preferably, a second return spring is installed between the top of the T-shaped protrusion on the vertical plate and the inner wall of the T-shaped groove on the arc-shaped slider. The top of the vertical plate passes through the interior of the arc-shaped slider and the fixed seat. The limiting block and the limiting groove are connected by a snap-fit ​​limiting connection.

[0010] Preferably, the clamping adapter adjustment assembly includes a worm gear, which is rotatably connected inside the clamping pad. The worm gear has guide grooves at equal angles on its side. A guide rod is slidably connected inside the guide groove. An adjustment plate is provided at equal angles on the outer side of the clamping pad away from the connecting rod. A worm is bearing-connected to the side of the worm gear inside the clamping pad. A telescopic rod is rotatably connected inside the arc-shaped slider below the vertical plate. A drive gear is fixedly sleeved on the outer side of the left end of the telescopic rod. The right end of the telescopic rod is connected to the bottom end of the worm through a bevel gear set. Several tooth blocks are fixedly connected at equal angles to the bottom of the inner wall of the arc-shaped groove.

[0011] Preferably, the plurality of adjustment plates are arranged in a "T" shape, and the vertical end of the adjustment plate extends into the interior of the clamping pad. The adjustment plate and the clamping pad are slidably connected, and the vertical end of the adjustment plate is sleeved and fixed on the outside of the guide rod away from the guide groove.

[0012] Preferably, the worm gear and the worm are meshed, one end of the telescopic rod extends out of the outer surface of the arc-shaped slider and the opening and closing sensor clamp, and the drive gear is meshed with several tooth blocks.

[0013] Preferably, the anti-loosening clamping assembly includes a connecting plate, which is fixedly installed on the lower side of one side of the arc-shaped slider by bolts, and multiple active rollers are rotatably connected to the outer side of the connecting plate at equal angles. A rotating rod is connected to the inside of the opening and closing sensor clamp body near the RF socket by a bearing, and a turntable is fixedly connected to both ends of the rotating rod. A driven roller is sleeved and fixed on the outer side of the upper end of the rotating rod.

[0014] Preferably, the top and bottom of the inner wall of the RF socket are bolted with support cylinders, and the two ends inside the support cylinders are slidably connected with connecting rod two and adjusting plate respectively. A clamping spring is installed between the opposing surfaces of the adjusting plate and connecting rod two. A clamping plate is fixedly installed at the end of connecting rod two away from the clamping spring. Guide plates are slidably connected to the upper and lower sides of the two turntables inside the opening and closing sensor clamp body. The guide plates are hinged to the adjusting plate through a movable plate.

[0015] Preferably, the driven roller corresponds to the position of the connecting plate, the driven roller contacts and frictionally drives multiple driving rollers, and one end of the guide plate is hinged to the side of the turntable.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the set clamping adaptation adjustment component, allows the operator to push the arc-shaped slider to slide along the arc-shaped groove, adjusting the distance between the two sets of clamping pads to adapt to power transmission and transformation busbars of different diameters. During the sliding of the arc-shaped slider, it can drive the gear, telescopic rod, bevel gear set, worm gear and worm wheel to rotate. The worm wheel squeezes the guide rod through the guide groove, driving multiple adjustment plates to unfold outward, increasing the contact area between the clamping pads and the busbar, improving the clamping fit stability, and can be used for various specifications of busbars. At the same time, the vertical plate, hinge plate, limit block and reset spring work together to lock the arc-shaped slider, reducing the possibility of displacement of the arc-shaped slider or loosening of the clamp during the inspection operation.

[0017] 2. This invention utilizes the universal ball structure on the clamping pad to finely adjust the contact angle of the clamping pad when there is a curvature deviation in the busbar or a slight misalignment in the assembly, ensuring that the pad is in close contact with the outer wall of the busbar and that the force is uniform. The buffer spring inside the threaded sleeve, together with the connecting rod, forms a buffer compensation structure. When the busbar expands and contracts due to temperature, the buffer spring can extend and retract to compensate for the clamping gap, maintain a relatively stable clamping force, and reduce the problems of clamping loosening and detection data deviation caused by busbar deformation.

[0018] 3. This invention is equipped with an RF plug anti-loosening clamping component. When the RF plug is connected to the RF socket, the plug presses against the clamping plates on both sides and compresses the clamping spring through the connecting rod. The spring rebound force clamps the RF plug, preventing it from loosening and reducing the probability of interface loosening, signal interruption, and data abnormality during testing. When the arc-shaped slider is adjusted, it can also move synchronously with the connecting plate, active roller, driven roller, rotating rod, turntable, guide plate, movable plate, and adjustment plate. It can synchronously adjust the preload of the clamping spring according to the change of the clamping pad spacing, realizing dynamic adaptation of mechanical linkage. At the same time, it can maintain a relatively stable clamping force for the RF plug, avoiding the situation where the spring preload is too large or too small due to the adjustment of the bus clamping size, which helps to stabilize the signal transmission of the RF interface. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the opening structure of the opening and closing sensor clamp of the present invention; Figure 3 This is a partial top-section diagram of the opening and closing sensor clamp body of the present invention; Figure 4 This is a side sectional view of the arc-shaped slider, fixed seat, and threaded sleeve of the present invention; Figure 5 This is a schematic diagram showing the disassembled structure of the adjusting plate, guide rod, and worm gear of the present invention; Figure 6 This is a schematic diagram of the connection structure of the vertical plate, hinge plate and limiting block of the present invention; Figure 7 This is a side sectional view of the radio frequency socket of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Opening / closing sensor clamp; 2. RF socket; 3. Arc-shaped slide groove; 4. Arc-shaped slider; 5. Fixing base; 6. Clamping pad; 7. Threaded rod; 8. Threaded sleeve; 9. Connecting rod one; 10. Universal ball; 1101. Worm gear; 1102. Adjusting plate; 1103. Guide groove; 1104. Guide rod; 1105. Worm gear; 1106. Telescopic rod; 1107. Tooth block; 1108. Drive gear; 1201. 1202. Connecting plate; 1203. Driving roller; 1204. Rotating rod; 1205. Turntable; 1206. Guide plate; 1207. Movable plate; 1208. Connecting rod two; 1209. Support cylinder; 1210. Adjusting plate; 1211. Clamping spring; 1212. Clamping plate; 13. Hinge plate; 14. Limiting block; 15. Vertical plate; 16. Limiting groove; 17. Return spring one; 18. Return spring two. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Please see Figures 1-8 The present invention provides a technical solution: an online detection device for partial discharge of power transmission and transformation busbar, including an openable sensor clamp 1, an arc-shaped sliding groove 3 symmetrically opened on the upper surface of the openable sensor clamp 1, and an RF socket 2 fixedly installed on the front of the openable sensor clamp 1. Four arc-shaped sliders 4 are slidably connected inside the two arc-shaped sliding grooves 3, and a fixing seat 5 is bolted to the upper surface of the arc-shaped slider 4. Clamping pads 6 are provided on the opposite sides of the four fixing seats 5. It also includes four threaded rods 7, each of which is bearing-connected to one side inside one of the four fixed seats 5. A threaded sleeve 8 is threadedly connected to the outer side of one end of each threaded rod 7. Two arc-shaped sliders 4 are symmetrically distributed inside the arc-shaped groove 3. The end of the threaded rod 7 away from the threaded sleeve 8 extends out of the outer surface of the fixed seat 5. The threaded sleeve 8 and the fixed seat 5 are in a sliding limiting fit. A deep groove is formed at the end of the threaded sleeve 8 away from the threaded rod 7. A connecting rod 9 is slidably connected inside the deep groove of the threaded sleeve 8. A return spring 17 is installed between one end of the connecting rod 9 and the inner wall of the deep groove. The connecting rod 9 is located away from the return spring 17. One end is movably connected to the side of the clamping pad 6 via a universal ball 10. A vertical plate 15 is slidably connected to one side inside the arc-shaped slider 4, and a limiting block 14 is slidably connected to the left side of the arc-shaped slider 4 below the vertical plate 15. The right side of the limiting block 14 is hinged to the bottom of the vertical plate 15 via a hinge plate 13. Several limiting grooves 16 are opened at equal angles on the outer periphery of the arc-shaped slide groove 3. A return spring 18 is installed between the top of the T-shaped protrusion on the vertical plate 15 and the inner wall of the T-shaped slide groove on the arc-shaped slider 4. The top of the vertical plate 15 passes through the interior of the arc-shaped slider 4 and the fixed seat 5. The limiting block 14 and the limiting groove 16 are engaged and limited.

[0023] In one embodiment of the present invention, the operator loosens the locking bolt of the openable sensor clamp 1, opens the clamp and places it on the outside of the power transmission and transformation busbar to be tested, tightens the locking bolt to complete the initial positioning of the clamp, lifts the vertical plate 15 upward, causing the hinge plate 13 to flip, pulls the limit block 14 to disengage from the limit groove 16, and releases the lock of the arc-shaped slider 4; pushes the arc-shaped slider 4 to slide along the arc-shaped slide groove 3, adjusts the distance between the two sets of clamping pads 6, and after the adjustment is completed, releases the vertical plate 15, the return spring 17 drives the hinge plate 13 to return to its original position, and the limit block 14 is locked into the limit groove 16 to lock the arc-shaped slider 4; rotates the threaded rod 7, and through the threaded sleeve 8, drives the clamping pad 6 to adhere to the outer wall of the busbar, completing the clamp installation. The clamping pad 6 is adjusted slightly by the universal ball 10 to adjust the contact angle, and the buffer spring, in conjunction with the connecting rod 9, can be adjusted on the busbar. When the wire expands or contracts due to heat, the clamping gap is compensated. Then, the acquisition probe on the openable sensor clamp 1 is attached to the outer wall of the busbar to collect partial discharge pulses, high-frequency electromagnetic waves, and ultrasonic signals during the operation of the busbar. It can capture weak discharge signals generated by defects such as aging insulation, cracks, partial breakdown, and pollution flashover in the busbar. After preprocessing, the acquired signals are transmitted to the matching detection terminal through the RF plug and RF socket 2. The terminal analyzes parameters such as signal amplitude, frequency, waveform, and number of discharges to determine the location, intensity, and condition of the partial discharge. The system compares the measured data with the preset threshold. If the signal is qualified, the busbar insulation condition is good. If the signal exceeds the threshold, the equipment issues an audible and visual warning and generates a detection report, marking the fault location and risk level, providing a reference for on-site hidden danger investigation and maintenance.

[0024] The clamping pad 6 and the arc-shaped slider 4 are internally equipped with a clamping adapter adjustment assembly, which includes a worm gear 1101. The worm gear 1101 is rotatably connected to the inside of the clamping pad 6, and the worm gear 1101 has guide grooves 1103 at equal angles on its side. A guide rod 1104 is slidably connected inside the guide groove 1103. Adjustment plates 1102 are equally angled on the outer side of the clamping pad 6 away from the connecting rod 9. Multiple adjustment plates 1102 are arranged in a "T" shape, and the vertical ends of the adjustment plates 1102 extend into the inside of the clamping pad 6. The adjustment plates 1102 and the clamping pad 6 are slidably connected, and the vertical ends of the adjustment plates 1102 are sleeved and fixed on the guide rod 1104 away from the guide groove 1104. On the outer side of one end of 103, inside the clamping pad 6, a worm 1105 is connected to the side bearing of the worm wheel 1101. Inside the arc-shaped slider 4, a telescopic rod 1106 is rotatably connected below the vertical plate 15. A drive gear 1108 is sleeved and fixed on the outer side of the left end of the telescopic rod 1106. The right end of the telescopic rod 1106 is connected to the bottom end of the worm 1105 through a bevel gear set. Several tooth blocks 1107 are fixedly connected at equal angles to the bottom of the inner wall of the arc-shaped slide groove 3. The worm wheel 1101 and the worm 1105 are meshed. One end of the telescopic rod 1106 extends out of the outer surface of the arc-shaped slider 4 and the opening and closing sensor clamp 1. The drive gear 1108 is meshed with several tooth blocks 1107.

[0025] In one embodiment of the present invention, when the arc-shaped slider 4 is adjusted, its bottom transmission structure drives the drive gear 1108 to mesh and roll along the toothed block 1107 at the bottom of the arc-shaped slide groove 3. The drive gear 1108 drives the telescopic rod 1106 to rotate together. The telescopic rod 1106 drives the worm gear 1105 to rotate through the bevel gear set. The worm gear 1105 meshes and drives the worm wheel 1101 to rotate. The guide groove 1103 on the end face of the worm wheel 1101 rotates synchronously. The groove wall squeezes the guide rod 1104, causing multiple adjustment plates 1102 to unfold outward, increasing the contact area between the clamping pad 6 and the busbar, and improving the clamping fit effect.

[0026] The radio frequency socket 2 and the openable sensor clamp 1 are equipped with an anti-loosening clamping assembly. The anti-loosening clamping assembly includes a connecting plate 1201. The connecting plate 1201 is fixedly installed on the lower side of one side of the arc-shaped slider 4 by bolts. Multiple active rollers 1202 are rotatably connected to the outer side of the connecting plate 1201 at equal angles. A rotating rod 1204 is connected to the inside of the openable sensor clamp 1 near the radio frequency socket 2 by a bearing. Both ends of the rotating rod 1204 are fixedly connected to a turntable 1205. A driven roller 1203 is sleeved and fixed on the outer side of the upper end of the rotating rod 1204. The top and bottom of the inner wall of the RF socket 2 are bolted with support cylinders 1209, and the two ends of the support cylinder 1209 are slidably connected with connecting rod 1208 and adjusting plate 1210 respectively. A clamping spring 1211 is installed between the opposite surfaces of the adjusting plate 1210 and the connecting rod 1208. A clamping plate 1212 is fixedly installed at the end of the connecting rod 1208 away from the clamping spring 1211. Inside the openable sensor clamp 1, guide plates 1206 are slidably connected to the upper and lower sides of the two turntables 1205. The guide plates 1206 and the adjusting plate 1210 are hinged together by a movable plate 1207. The driven roller 1203 is positioned corresponding to the connecting plate 1201. The driven roller 1203 contacts and rubs with multiple active rollers 1202. One end of the guide plate 1206 is hinged to the side of the turntable 1205.

[0027] In one embodiment of the present invention, the RF plug is inserted into the RF socket 2. The plug presses against the clamping plates 1212 on both sides, and the clamping spring 1211 is compressed by the connecting rod 1208. The spring force is used to clamp the RF plug, reducing the risk of interface loosening. During the sliding adjustment of the arc-shaped slider 4 in the arc-shaped slide groove 3, the connecting plate 1201 and the active roller 1202 move synchronously. The driven roller 1203, the rotating rod 1204, and the turntable 1205 are driven to rotate by friction transmission, pulling the guide plate 1206, so that the movable plate 1207 changes from inclined to vertical, and pushes the adjusting plate 1210 to press the clamping spring 1211. The preload of the clamping spring 1211 can be adjusted synchronously with the change of the spacing of the clamping pads 6, realizing mechanical linkage dynamic adaptation. At the same time, it can maintain a relatively stable clamping force for the RF plug, avoiding the situation where the spring preload is too large or too small due to the adjustment of the bus clamping size, which helps to stabilize the signal transmission of the RF interface.

[0028] Working principle: First, the operator loosens the locking bolts on the openable sensor clamp 1 to release the clamp's closed lock. The operator opens the clamp and aligns it with the outside of the power transmission and transformation busbar to be tested, ensuring that the clamp and busbar are aligned neatly. After alignment, the operator tightens the locking bolts to initially fix the clamp, facilitating subsequent adjustment of the clamping distance. The operator then lifts the vertical plate 15 upwards, causing the hinge plate 13, which is hinged to the vertical plate 15, to flip and tilt upwards from a horizontal position. The hinge plate 13 pulls the limiting block 14 inwards, causing the limiting block 14 to disengage from the limiting groove 16 on the arc-shaped slide 3, releasing the position lock of the arc-shaped slider 4. After the lock is released, the operator manually pushes the arc-shaped slider 4 to slide along the arc-shaped slide 3, adjusting the distance between the two sets of clamping pads 6 to adapt to power transmission and transformation busbars of different diameters. During the sliding adjustment of the arc-shaped slider 4, the transmission structure at the bottom of the arc-shaped slider 4 drives the drive gear 1108 to mesh and roll along the toothed block 1107 at the bottom of the arc-shaped slide groove 3. The drive gear 1108 drives the telescopic rod 1106 to rotate synchronously. The telescopic rod 1106 drives the worm gear 1105 to rotate through the bevel gear set reversing transmission. The worm gear 1105 meshes and drives the worm wheel 1101 to rotate. The guide groove 1103 on the end face of the worm wheel 1101 rotates synchronously with the worm wheel 1101. The groove wall squeezes the guide rod 1104, which drives multiple adjustment plates 1102 to expand outward synchronously, increasing the contact area between the clamping pad 6 and the busbar and improving the clamping and fitting stability. After the spacing and clamping area of ​​the clamping pads 6 are adjusted to match the busbar, the vertical plate 15 is released. The vertical plate 15 is reset downward under the elastic force of the reset spring 17, which drives the hinge plate 13 to rotate back to the horizontal state. The hinge plate 13 pushes the limit block 14 outward, so that the limit block 14 is inserted into the limit groove 16, and the arc-shaped slider 4 is locked again to prevent the arc-shaped slider 4 from shifting or the clamping from loosening during the detection operation. After the arc-shaped slider 4 is locked, the operator rotates the four sets of threaded rods 7 in the forward direction. The threaded rods 7 drive the threaded sleeve 8 to move through the threaded transmission. The threaded sleeve 8 drives the clamping pads 6 to approach the power transmission busbar until the clamping pads 6 are tightly attached to the outer wall of the busbar, thus completing the installation of the sensor clamp. The clamping pad 6 is equipped with a universal ball 10 structure on its inner side. When there is a curvature deviation of the busbar or a slight misalignment in the assembly, the contact angle of the clamping pad 6 can be finely adjusted by rotating the universal ball 10 to ensure that the pad is in close contact with the outer wall of the busbar and that the force is uniform. The threaded sleeve 8 is equipped with a buffer spring, which, together with the connecting rod 9, forms a buffer compensation structure. When the power transmission and transformation busbar expands and contracts due to temperature changes, the buffer spring can extend and retract to compensate for the clamping gap, maintain a stable clamping force, and reduce the problems of clamping loosening and detection data deviation caused by busbar deformation. After the equipment is installed, the RF plug is connected to the RF socket 2. During the plug insertion process, the clamping plates 1212 on both sides of the socket are pressed. The clamping plates 1212 compress the clamping springs 1211 through the connecting rod 1208. The RF plug is clamped by the rebound force of the clamping springs 1211, which prevents the plug from loosening and reduces the occurrence of interface loosening, signal interruption, and data abnormality during the detection process. When the arc-shaped slider 4 slides along the arc-shaped slide groove 3, it simultaneously drives the connecting plate 1201 and multiple sets of active rollers 1202 to move. The active rollers 1202 drive the driven rollers 1203 by friction transmission. When the rotating rod 1204 rotates, the turntables 1205 at both ends of the rotating rod 1204 rotate synchronously, pulling the guide plate 1206 to move, causing the movable plate 1207 to change from tilted to vertical, and pushing the adjustment plate 1210 to move slightly to compress the clamping spring 1211. The preload of the clamping spring 1211 can be adjusted synchronously with the change of the spacing of the clamping pads 6, realizing dynamic adaptation of mechanical linkage. At the same time, it can maintain a relatively stable clamping force for the RF plug, avoiding the situation where the spring preload is too large or too small due to the adjustment of the bus clamping size, which helps to stabilize the signal transmission of the RF interface. The acquisition probe on the openable sensor clamp 1 is attached to the outer wall of the busbar to collect partial discharge pulses, high-frequency electromagnetic waves, and ultrasonic signals generated by the busbar operation in real time. When the busbar has defects such as insulation aging, cracks, partial breakdown, or pollution flashover and generates abnormal discharge, the sensor captures weak abnormal signals. After preprocessing, the acquired signals are transmitted to the matching detection terminal through the signal transmission channel composed of the RF plug and RF socket 2. The terminal analyzes the parameters such as pulse amplitude, frequency, waveform, and number of discharges of the signal to determine the location, intensity, and severity of the partial discharge. The system compares the real-time detection data with the preset discharge threshold. If the signal is within the qualified range, the busbar insulation condition is determined to be good. When the acquired signal exceeds the threshold, the busbar is determined to have insulation defects and partial discharge faults. The equipment triggers an audible and visual prompt and generates a detection report, marking the fault location and risk level, providing a basis for on-site maintenance and hidden danger investigation.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A partial discharge online detection device for power transmission and transformation busbars, comprising an openable sensor clamp (1), wherein the upper surface of the openable sensor clamp (1) is symmetrically provided with arc-shaped sliding grooves (3), and an RF socket (2) is fixedly installed on the front side of the openable sensor clamp (1), four arc-shaped sliders (4) are slidably connected inside the two arc-shaped sliding grooves (3), and a fixing seat (5) is bolted to the upper surface of the arc-shaped sliders (4), and clamping pads (6) are provided on the opposite sides of the four fixing seats (5); Its features are: It also includes four threaded rods (7), all four threaded rods (7) are bearing connected to one side inside the four fixed seats (5). The outer side of one end of the threaded rod (7) is threadedly connected to a threaded sleeve (8), and the end of the threaded sleeve (8) away from the threaded rod (7) is provided with a deep groove. The inside of the deep groove on the threaded sleeve (8) is slidably connected to a connecting rod (9), and a return spring (17) is installed between one end of the connecting rod (9) and the inner wall of the deep groove. The end of the connecting rod (9) away from the return spring (17) is movably connected to the side of the clamping pad (6) through a universal ball (10). The clamping pad (6) and the arc-shaped slider (4) are provided with clamping adapter adjustment components. The inside of the RF socket (2) and the opening and closing sensor clamp (1) is provided with anti-loosening clamping components.

2. The online detection device for partial discharge of power transmission and transformation busbars according to claim 1, characterized in that: Two of the arc-shaped sliders (4) are symmetrically distributed inside the arc-shaped groove (3). The end of the threaded rod (7) away from the threaded sleeve (8) extends out of the outer surface of the fixed seat (5). The threaded sleeve (8) and the fixed seat (5) are in a sliding limiting fit.

3. The online detection device for partial discharge of power transmission and transformation busbars according to claim 1, characterized in that: One side of the arc-shaped slider (4) is slidably connected to a vertical plate (15), and a limiting block (14) is slidably connected to the left side of the arc-shaped slider (4) below the vertical plate (15). The right side of the limiting block (14) is hinged to the bottom of the vertical plate (15) through a hinge plate (13). Several limiting grooves (16) are opened at equal angles on the outer periphery of the arc-shaped slide (3).

4. The online detection device for partial discharge of power transmission and transformation busbars according to claim 3, characterized in that: A reset spring 2 (18) is installed between the top of the T-shaped protrusion on the vertical plate (15) and the inner wall of the T-shaped groove on the arc slider (4). The top of the vertical plate (15) passes through the interior of the arc slider (4) and the fixed seat (5). The limiting block (14) and the limiting groove (16) are connected by a snap-fit ​​limiting connection.

5. The online detection device for partial discharge of power transmission and transformation busbars according to claim 1, characterized in that: The clamping adapter adjustment assembly includes a worm gear (1101), which is rotatably connected to the inside of the clamping pad (6). A guide groove (1103) is provided at equal angles on the side of the worm gear (1101). A guide rod (1104) is slidably embedded inside the guide groove (1103). An adjustment plate (1102) is provided at equal angles on the outer side of the clamping pad (6) away from the connecting rod (9). The inside of the clamping pad (6) is located within the worm gear (1104). The side bearing of 101) is connected to a worm gear (1105). The inside of the arc-shaped slider (4) is rotatably connected to a telescopic rod (1106) located below the vertical plate (15). A drive gear (1108) is sleeved and fixed on the outer side of the left end of the telescopic rod (1106). The right end of the telescopic rod (1106) is connected to the bottom end of the worm gear (1105) through a bevel gear set. Several tooth blocks (1107) are fixedly connected at equal angles to the bottom of the inner wall of the arc-shaped slide groove (3).

6. The online detection device for partial discharge of power transmission and transformation busbars according to claim 5, characterized in that: The multiple adjustment plates (1102) are arranged in a "T" shape, and the vertical end of the adjustment plate (1102) extends into the interior of the clamping pad (6). The adjustment plate (1102) and the clamping pad (6) are slidably connected, and the vertical end of the adjustment plate (1102) is sleeved and fixed on the outside of the guide rod (1104) away from the guide groove (1103).

7. The online detection device for partial discharge of power transmission and transformation busbars according to claim 5, characterized in that: The worm gear (1101) and the worm (1105) are meshed together. One end of the telescopic rod (1106) extends out of the outer surface of the arc-shaped slider (4) and the opening and closing sensor clamp (1). The drive gear (1108) and several tooth blocks (1107) are meshed together.

8. The online detection device for partial discharge of power transmission and transformation busbars according to claim 1, characterized in that: The anti-loosening clamping assembly includes a connecting plate (1201), which is fixedly installed on the lower side of the arc-shaped slider (4) by bolts. Multiple active rollers (1202) are rotatably connected to the outer side of the connecting plate (1201) at equal angles. A rotating rod (1204) is connected to the inside of the opening and closing sensor clamp (1) near the radio frequency socket (2) by a bearing. Both ends of the rotating rod (1204) are fixedly connected to a turntable (1205). A driven roller (1203) is sleeved and fixed on the outer side of the upper end of the rotating rod (1204).

9. The online detection device for partial discharge of power transmission and transformation busbars according to claim 8, characterized in that: The top and bottom of the inner wall of the radio frequency socket (2) are bolted with support cylinders (1209), and the two ends of the support cylinder (1209) are slidably connected with connecting rod two (1208) and adjusting plate (1210), respectively. A clamping spring (1211) is installed between the opposite surfaces of the adjusting plate (1210) and connecting rod two (1208). A clamping plate (1212) is fixedly installed at the end of the connecting rod two (1208) away from the clamping spring (1211). Inside the opening and closing sensor clamp body (1), guide plates (1206) are slidably connected to the upper and lower sides of the two turntables (1205). The guide plates (1206) and the adjusting plate (1210) are hinged together by a movable plate (1207).

10. The online detection device for partial discharge of power transmission and transformation busbars according to claim 9, characterized in that: The driven roller (1203) is positioned opposite to the connecting plate (1201). The driven roller (1203) is in contact with multiple driving rollers (1202) for frictional transmission. One end of the guide plate (1206) is hinged to the side of the turntable (1205).

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