Overhead transmission line steel strand corrosion detection device

Abstract

The invention relates to the technical field of electric power detection, and particularly discloses an overhead transmission line steel strand corrosion detection device, which comprises a suspension bracket matched with a steel strand, the suspension bracket comprises a cross beam, two ends of the cross beam are connected with U-shaped frames, hanging wheels are arranged in the U-shaped frames, one of the U-shaped frames is provided with a pair of driving wheels for clamping the steel strand, and the other U-shaped frame is provided with a pair of driving wheels for clamping the steel strand. The driving wheel is connected with a second motor, the lower end of the cross beam is connected with a measuring mechanism and a camera, the measuring mechanism comprises a semicircular track connected with the cross beam, the track is connected with a measuring claw, and the measuring claw clamps the steel strand and rotates along the track to measure the diameter of the whole circle of the steel strand; according to the invention, not only can the real-time inspection be carried out along the steel strand, but also the diameter of the corrosion position can be measured, the problem that power failure operation is needed in manual detection is avoided, the detection efficiency and comprehensiveness are improved, the measurement efficiency is higher, and the measurement mode is safer and more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of power detection, and particularly to a steel strand corrosion detection device for overhead transmission lines. Background Art

[0002] The ground wires of overhead transmission lines are usually steel strands, which will be corroded due to the influence of the operating environment. In severe cases, it will lead to the occurrence of broken strand and broken wire accidents. According to the "DL T 741-2019 Operating Regulations for Overhead Transmission Lines" and the "DL / T 2055 Steel Strand Replacement Principle", the judgment criteria for ground wire corrosion are the appearance of rust spots, slag falling, bulging and other phenomena on the surface. The steel strand replacement principle is that the diameter deformation ratio after corrosion is more than 8%, or the diameter after corrosion is reduced by more than 2 mm.

[0003] Currently, it is screened by flying a drone to take pictures. For those with broken strands caused by corrosion, power outages are required for repair or replacement. For those with severe corrosion, power outages are required, and manual tower climbing measurement is carried out, which not only affects normal power supply, but also has low detection efficiency. Summary of the Invention

[0004] In view of the above deficiencies of the existing technology, the present invention provides a steel strand corrosion detection device for overhead transmission lines, which can not only conduct on-site inspections along the steel strand, but also measure the diameter of the corrosion position, avoiding the problem of power outage operation required for manual detection, improving not only the detection efficiency and comprehensiveness, but also the measurement efficiency, and the measurement method is safer and more convenient.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A steel strand corrosion detection device for overhead transmission lines includes a suspension bracket that cooperates with the steel strand. The suspension bracket includes a cross beam, and both ends of the cross beam are connected with U-shaped frames. There are hanging wheels in the U-shaped frames. A pair of driving wheels for clamping the steel strand are provided on one of the U-shaped frames. A second motor is connected to the driving wheels. A measuring mechanism and a camera are connected to the lower end of the cross beam. The measuring mechanism includes a semi-circular track connected to the cross beam. A measuring claw is connected to the track. The measuring claw clamps the steel strand and rotates along the track to measure the diameter of the steel strand in a full circle.

[0007] Preferably, pull rings are provided at both ends of the cross beam, and a support rod for fixing the camera is connected to the lower end of the cross beam. The camera faces the measuring claw.

[0008] Preferably, the lower ends of the U-shaped frames are provided with outwardly inclined support legs, and the support legs on the same side are connected by connecting rods. An installation plate is connected between the U-shaped frames, and a battery is provided on the installation plate.

[0009] Preferably, both ends of the hanging wheel are connected with movable sleeves that cooperate with the U-shaped frames, and locking bolts are provided on the movable sleeves.

[0010] Preferably, a support arm is connected to the side wall of the U-shaped frame, a push-pull frame is sleeved on the outer side of the driving wheel, the second motor is located at the upper end of the push-pull frame, a second guide rod passing through the support arm is connected to the side wall of the push-pull frame, and a third electric push rod connected to the push-pull frame is fixed on the side wall of the support arm.

[0011] Preferably, V-shaped grooves are provided on the wheel surfaces of the driving wheel and the hanging wheel.

[0012] Preferably, an upper pull-up plate is provided on one side of the track, and the upper end of the upper pull-up plate slides with the track, and a lower pull-up plate that can slide up and down is connected to the side wall of the upper pull-up plate, and the lower end of the lower pull-up plate is connected to a support beam, and a parallel third guide rod is connected below the support beam, and the measuring claw comprises a clamping block that cooperates with the third guide rod, and the lower end of the clamping block is connected to a clamping roller, and springs connecting the clamping block and the support beam are sleeved at both ends of the third guide rod, and a digital vernier caliper and a second electric push rod are respectively provided on both sides of the clamping block, the second electric push rod is connected to one of the clamping blocks, and a push block for pushing the other clamping block is provided at the push rod end of the second electric push rod, the screen of the digital vernier caliper faces the camera, and the measuring claws of the digital vernier caliper are respectively connected to the two clamping blocks, and the measuring edges of the measuring claws are flush with the roller surfaces of the clamping rollers.

[0013] Preferably, the middle part of the track is connected to the crossbeam through a pull block, a reinforcement rod is connected between the pull block and both ends of the track, the track is a hollow structure, a rack is provided inside the track, a clearance hole is provided on the side wall of the track, a sliding sleeve matching the track is provided at the upper end of the upper pull plate, a gear matching the rack is provided in the sliding sleeve, and a first motor for driving the gear is provided on the side wall of the upper pull plate.

[0014] Preferably, a guide rail is provided on the side wall of the upper pull plate, a slider matched with the guide rail is provided on the side wall of the lower pull plate, and a first electric push rod is connected between the upper pull plate and the lower pull plate.

[0015] Preferably, a vertical first guide rod is connected to the side wall of the support beam, a transverse limit rod is provided on one side of the clamping roller, both ends of the limit rod are sleeved on the first guide rod, both ends of the limit rod are provided with positioning bolts, and a proximity switch is provided on the side wall of the limit rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can not only conduct real-time inspection along the steel strand, but also measure the diameter of the rusted position, thus avoiding the problem of power outage required for manual inspection. It not only improves the efficiency and comprehensiveness of inspection, but also has higher measurement efficiency and a safer and more convenient measurement method.

[0018] 2. The height of the change gears and measuring claws of the present invention is adjustable, enabling the device to be applicable to the measurement of steel strands with different diameters and increasing the versatility of use.

[0019] 3. The suspension method of the suspension bracket of the present invention is simple and reliable, and the overall structure is narrow at the top and wide at the bottom, ensuring the stability during use.

[0020] 4. The measuring mechanism of the present invention can realize 180° measurement around the steel strand to measure the whole-circle diameter of the steel strand, ensuring the comprehensiveness of detection; the pinch rolls automatically clamp the steel strand under the action of the spring, and at the same time ensure that the pinch rolls always fit the steel strand during the detection process, guaranteeing the accuracy of detection.

[0021] 5. The present invention sets a limit rod to limit the height of the cooperation between the measuring claws and the steel strand, ensuring that when the upper pull plate rotates along the track, the measuring claws can realize the circumferential measurement of the steel strand. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a left view of the present invention;

[0024] Figure 3 is a front view of the present invention;

[0025] Figure 4 is a structural schematic diagram of the measuring mechanism Figure 1 ;

[0026] Figure 5 is a structural schematic diagram of the measuring mechanism Figure 2 ;

[0027] Figure 6 is a structural schematic diagram of the measuring mechanism after removing the track;

[0028] Figure 7 is a structural schematic diagram of the track;

[0029] In the figure: 1 - suspension bracket; 101 - pull ring; 102 - cross beam; 103 - U-shaped bracket; 104 - connecting rod; 105 - support leg; 106 - support arm; 107 - mounting plate; 108 - support rod; 2 - hanging wheel; 201 - moving sleeve; 202 - locking bolt; 3 - measuring mechanism; 301 - track; 302 - reinforcing rod; 303 - pulling block; 304 - upper pulling plate; 305 - lower pulling plate; 306 - support beam; 307 - digital vernier caliper; 308 - first guiding rod; 309 - pinch roller; 310 - proximity switch; 311 - limiting rod; 312 - positioning bolt; 313 - spring; 314 - first electric push rod; 315 - second electric push rod; 316 - pushing block; 317 - guide rail; 318 - slider; 319 - first motor; 320 - sliding sleeve; 321 - gear; 322 - relief hole; 323 - rack; 324 - third guiding rod; 325 - clamping block; 4 - steel strand; 5 - driving wheel; 501 - push-pull frame; 502 - third electric push rod; 503 - second guiding rod; 504 - second motor; 6 - battery; 7 - camera. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figure 1 、 Figure 2 shown, a rust detection device for overhead transmission line steel strands includes a suspension bracket 1 cooperating with the steel strand 4. The suspension bracket 1 includes a cross beam 102. Both ends of the cross beam 102 are connected with U-shaped brackets 103. A hanging wheel 2 is arranged in the U-shaped bracket 103. A pair of driving wheels 5 for clamping the steel strand 4 are arranged on one of the U-shaped brackets 103. A second motor 504 is connected to the driving wheel 5. The driving wheel 5 drives the suspension bracket 1 to move along the steel strand 4. The lower end of the cross beam 102 is connected with a measuring mechanism 3 and a camera 7. The measuring mechanism 3 includes a semi-circular track 301 connected to the cross beam 102. A measuring claw is connected to the track 301. The measuring claw clamps the steel strand 4 and rotates along the track 301 to measure the diameter of the steel strand 4 in a full circle. The camera 7 takes real-time pictures of the rust condition of the steel strand 4 during the movement of the suspension bracket 1. When a severely rusted area is found, the suspension bracket 1 stops, and the measuring claw measures this area. During the measurement process, it can be observed in real time through the camera 7.

[0032] At both ends of the cross beam 102, there are pull rings 101. A pull rope can be connected to the pull rings 101. The suspension bracket 1 is hung on the steel strand 4 by a drone. At the lower end of the cross beam 102, there is a support rod 108 for fixing the camera 7, and the camera 7 faces the measuring claws.

[0033] At the lower end of the U-shaped frame 103, there are outwardly inclined support legs 105. The support legs 105 not only facilitate the placement and fixation of the suspension bracket 1, but also can improve the stability of the suspension bracket 1 during use. The support legs 105 on the same side are connected by a connecting rod 104. There is a mounting plate 107 connected between the U-shaped frames 103 to ensure the overall structural stability and firmness. There is a rechargeable battery 6 on the mounting plate 107 to supply power to the device.

[0034] At both ends of the hanging wheel 2, there are moving sleeves 201 that cooperate with the U-shaped frame 103. There are locking bolts 202 on the moving sleeves 201, which can adjust the height of the hanging wheel 2.

[0035] As Figure 3 shown, on the side wall of the U-shaped frame 103, there is a support arm 106. There is a push-pull frame 501 sleeved outside the driving wheel 5. The second motor 504 is located at the upper end of the push-pull frame 501. On the side wall of the push-pull frame 501, there is a second guide rod 503 that penetrates the support arm 106. On the side wall of the support arm 106, there is a third electric push rod 502 connected to the push-pull frame 501. The clamping wheel is driven by the third electric push rod 502 to clamp the steel strand 4.

[0036] There are V-shaped grooves on the wheel surfaces of both the driving wheel 5 and the hanging wheel 2. The position of the clamping wheel is fixed, and the height of the hanging wheel 2 can be adjusted according to the diameter of the steel strand 4, thereby increasing the versatility of use. In addition, the center height of the track 301 is the same as the middle position of the clamping wheel. That is, after the clamping wheel clamps the steel strand 4, the center of the track 301 is located on the center line of the steel strand 4. The measuring claws rotate around the track 301, and the circumferential measurement of the steel strand 4 can be realized.

[0037] As Figure 4 、 Figure 5As shown in the figure, a pull-up plate 304 is provided on one side of the track 301. The upper end of the pull-up plate 304 is slidably engaged with the track 301. A pull-down plate 305 that can slide up and down is connected to the side wall of the pull-up plate 304. A support beam 306 is connected to the lower end of the pull-down plate 305. A parallel third guide rod 324 is connected below the support beam 306. The measuring jaw includes a clamping block 325 that cooperates with the third guide rod 324. A clamping roller 309 is connected to the lower end of the clamping block 325. Springs 313 that connect the clamping block 325 and the support beam 306 are sleeved on both ends of the third guide rod 324. The springs 313 push the clamping block 325 to clamp the clamping roller 309. A digital vernier caliper 307 and a second electric push rod 315 are respectively provided on both sides of the clamping block 325. The second electric push rod 315 is connected to one of the clamping blocks 325. A push block 316 that pushes the other clamping block 325 is provided at the end of the push rod of the second electric push rod 315. The measuring jaws of the digital vernier caliper 307 are respectively connected to the two clamping blocks 325. The measuring edges of the measuring jaws are flush with the roller surface of the clamping roller 309 (the contact surface with the steel strand 4). The clamping roller 309 drives the measuring jaws to move. The distance between the two clamping rollers 309 is the distance between the two measuring jaws. The clamping roller 309 clamps the steel strand 4. The reading of the digital vernier caliper 307 is the diameter of the steel strand 4. The screen of the digital vernier caliper 307 faces the camera 7. The measurement data can be read through the camera 7. At the same time, an electronic caliper with a built-in Bluetooth function (such as Mitutoyo 500-196-30) can be selected, and the reading of the electronic vernier caliper can be transmitted to the mobile phone, which is convenient for data recording and subsequent processing.

[0038] The middle part of the track 301 is connected to the cross beam 102 through a pull block 303. Reinforcing rods 302 are connected between the pull block 303 and both ends of the track 301. The track 301 is a hollow structure. A rack 323 is provided inside the track 301. A relief hole 322 is provided on the side wall of the track 301. A sliding sleeve 320 that cooperates with the track 301 is provided at the upper end of the pull-up plate 304. There is a relief opening on one side of the sliding sleeve 320 to make way for the pull block 303, as Figure 7 shown, a gear 321 that cooperates with the rack 323 is provided inside the sliding sleeve 320. A first motor 319 that drives the gear 321 is provided on the side wall of the pull-up plate 304.

[0039] In order to adapt to steel strands 4 with different diameters, as Figure 6 shown, a guide rail 317 is provided on the side wall of the pull-up plate 304. A slider 318 that cooperates with the guide rail 317 is provided on the side wall of the pull-down plate 305. A first electric push rod 314 is connected between the pull-up plate 304 and the pull-down plate 305. The height of the measuring jaw can be adjusted through the first electric push rod 314.

[0040] A vertical first guide rod 308 is connected to the side wall of the support beam 306. A transverse limit rod 311 is provided on one side of the pinch roller 309. The two ends of the limit rod 311 are sleeved on the first guide rod 308. Positioning bolts 312 are provided at the two ends of the limit rod 311. A proximity switch 310 is provided on the side wall of the limit rod 311. The height of the measuring claw can be limited by adjusting the limit rod 311. During adjustment, the limit rod 311 is located above the center of the track 301, and the distance from the center of the track 301 is half of the diameter of the steel strand 4. When the proximity switch 310 detects the steel strand 4, the measuring claw stops moving downward.

[0041] Before use, according to the diameter of the steel strand 4 to be detected, adjust the height of the hanging wheel 2 and the limit rod 311 so that after the pinch wheel clamps the steel strand 4, the hanging wheel 2 presses on the upper end of the steel strand 4, and the limit rod 311 just touches the upper end of the steel strand 4. After adjustment, raise the measuring claw and at the same time start the second electric push rod 315 to spread the two pinch rollers 309 apart; use a drone to hang the suspension bracket 1 from the upper end of the steel strand 4. After the suspension bracket 1 is hung by the hanging wheel 2, the pinch wheel clamps the steel strand 4. Driven by the second motor 504, the suspension bracket 1 moves along the steel strand 4, and the camera 7 takes real-time pictures of the surface condition of the steel strand 4. The shooting position is below the measuring claw. When a severely corroded area is found, the suspension bracket 1 stops, the measuring claw moves downward, and stops after the proximity switch 310 detects the steel strand 4. At this time, the limit rod 311 just touches the upper end of the steel strand 4. The push rod of the second electric push rod 315 retracts, and the pinch rollers 309 clamp the steel strand 4 under the action of the spring 313. At this time, the digital vernier caliper 307 displays the diameter of the steel strand 4. The first motor 319 is started to move the upper pull plate 304 from one end of the track 301 to the other end. At this time, the pinch rollers 309 rotate 180° around the steel strand 4 to realize the measurement of the diameter of the entire circle of the steel strand 4. During the measurement process, the measurement data can be observed in real time through the camera 7, and at the same time the measurement data is transmitted to the mobile phone for recording in real time. After the detection is completed, the second electric push rod 315 spreads the pinch rollers 309 apart, and the first electric push rod 314 pulls the measuring claw away from the steel strand 4, waiting for the next measurement.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. An overhead transmission line stranded steel wire corrosion detection device, characterized in that: It includes a suspension frame that cooperates with the steel strand, the suspension frame includes a crossbeam, both ends of the crossbeam are connected to U-shaped frames, and the U-shaped frames are provided with hanging wheels. One of the U-shaped frames is provided with a pair of driving wheels for clamping the steel strand, and the driving wheels are connected to a second motor. The lower end of the crossbeam is connected to a measuring mechanism and a camera, and the measuring mechanism includes a semicircular track connected to the crossbeam, and the track is connected to a measuring claw. The measuring claw clamps the steel strand and rotates along the track to measure the diameter of the steel strand for a full circle.

2. The steel strand corrosion detection device for overhead transmission lines according to claim 1, wherein: Pull rings are provided at both ends of the crossbeam, and a support rod for fixing a camera is connected to the lower end of the crossbeam, and the camera faces the measuring claw.

3. The steel strand corrosion detection device for overhead transmission lines according to claim 1, characterized in that: The lower end of the U-shaped frame is provided with a supporting leg inclined outward, and the supporting legs on the same side are connected by a connecting rod. A mounting plate is connected between the U-shaped frames, and a battery is arranged on the mounting plate.

4. The steel strand corrosion detection device for overhead transmission lines according to claim 1, wherein: Both ends of the hanging wheel are connected with moving sleeves matched with the U-shaped frame, and locking bolts are arranged on the moving sleeves.

5. The steel strand corrosion detection device for overhead transmission lines according to claim 4, characterized in that: A support arm is connected to the side wall of the U-shaped frame, a push-pull frame is sleeved on the outer side of the driving wheel, the second motor is located at the upper end of the push-pull frame, a second guide rod penetrating the support arm is connected to the side wall of the push-pull frame, and a third electric push rod connected to the push-pull frame is fixed on the side wall of the support arm.

6. The steel strand corrosion detection device for overhead transmission lines according to claim 1, wherein: The wheel surfaces of the driving wheel and the hanging wheel are both provided with V-shaped grooves.

7. The steel strand corrosion detection device for overhead transmission lines according to claim 4, wherein: An upper pull-up plate is provided on one side of the track, and the upper end of the upper pull-up plate slides with the track, and a lower pull-up plate that can slide up and down is connected to the side wall of the upper pull-up plate, and the lower end of the lower pull-up plate is connected to a support beam, and a parallel third guide rod is connected below the support beam, and the measuring claw includes a clamping block that cooperates with the third guide rod, and the lower end of the clamping block is connected to a clamping roller, and both ends of the third guide rod are sleeved with springs connected to the clamping block and the support beam, and a digital vernier caliper and a second electric push rod are respectively provided on both sides of the clamping block, the second electric push rod is connected to one of the clamping blocks, and a push block for pushing the other clamping block is provided at the push rod end of the second electric push rod, the screen of the digital vernier caliper faces the camera, and the measuring claws of the digital vernier caliper are respectively connected to the two clamping blocks, and the measuring edges of the measuring claws are flush with the roller surface of the clamping roller.

8. The steel strand corrosion detection device for overhead transmission lines according to claim 7, wherein: The middle part of the track is connected to the crossbeam through a pull block, and a reinforcement rod is connected between the pull block and both ends of the track. The track is a hollow structure, a rack is provided inside the track, and a clearance hole is provided on the side wall of the track. A sliding sleeve matching the track is provided at the upper end of the upper pull plate, a gear matching the rack is provided in the sliding sleeve, and a first motor for driving the gear is provided on the side wall of the upper pull plate.

9. The steel strand corrosion detection device for overhead transmission lines according to claim 7, characterized in that: A guide rail is arranged on the side wall of the upper pull plate, a sliding block matched with the guide rail is arranged on the side wall of the lower pull plate, and a first electric push rod is connected between the upper pull plate and the lower pull plate.

10. An overhead transmission line stranded steel wire corrosion detection device according to claim 7, characterized in that: A vertical first guide rod is connected to the side wall of the support beam, a horizontal limit rod is provided on one side of the clamping roller, both ends of the limit rod are sleeved on the first guide rod, both ends of the limit rod are provided with positioning bolts, and a proximity switch is provided on the side wall of the limit rod.

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