A maintenance and replacement device for damaged insulators

Abstract

The present application relates to the technical field of power maintenance equipment, in particular to a kind of damaged insulator maintenance replacement equipment, including clamping mechanism and transmission rod, clamping mechanism has two, two clamping mechanism are arranged in front and back interval, transmission rod has two, two transmission rods are arranged in left and right interval, and transmission rod both ends are connected with two clamping mechanism correspondingly.The present application is provided with clamping mechanism and transmission rod, when replacing insulator, staff rotates any transmission rod, the transmission rod is driven by transmission assembly, so that left jaw, right jaw and upper jaw are synchronously close to the axis of steel cap, so as to complete the clamping and fixing of insulator, in this process, staff only needs to stand at either side of the two sides of the insulator to be replaced, without adjusting own position, so that installation process is more convenient, and safety is also higher.

Description

Technical Field

[0001] This invention relates to the field of power maintenance equipment technology, and in particular to a maintenance and replacement device for damaged insulators. Background Technology

[0002] Insulators are commonly used electrical devices in power transmission lines. They can isolate live conductors (such as conductors and electrodes) from grounded conductors (such as towers and equipment casings) while bearing mechanical loads (such as the weight of conductors and wind force) to ensure the safe and stable operation of the power system.

[0003] During installation, multiple insulators are arranged in a line along their axis. Then, the insulators are connected sequentially by the snap-fit ​​groove of the insulator cap and the snap-fit ​​of the steel feet of the adjacent insulators. Finally, the pin is inserted into the snap-fit ​​groove of the steel cap, and the steel feet are firmly connected in the snap-fit ​​groove by the squeezing action of the pin. This completes the connection of multiple insulators.

[0004] Under the operating environment, insulators may develop defects such as cracks or breakage of the tempered glass body due to natural factors (lightning strikes, overvoltage, and temperature changes, etc.) as well as human and equipment factors (mechanical stress overload, collision, and fatigue, etc.). In such cases, the damaged insulators need to be replaced.

[0005] Currently, commonly used insulator replacement equipment, such as the device used in the method for replacing insulators in transmission lines disclosed in Chinese invention patent CN115051280B, can be simply described as follows: First, two positioning clamps are installed on the insulator strings on both sides of the insulator to be replaced. Then, the distance between the two positioning clamps is reduced by pulling back the clamps to pull out the pins connected to the insulator to be replaced. Next, the insulator to be replaced is removed, a new insulator is installed, and the pins are inserted back into the new insulator. Then, the two positioning clamps are reset by pulling back the clamps. Finally, the positioning clamps are removed, thus completing the replacement of the new insulator.

[0006] However, the existing insulator replacement equipment has the following problems when in use: During installation, the workers usually first install one of the positioning clamps on one side of the insulator string of the insulator to be replaced, and then move along the insulator string to a position that is convenient for installing the other positioning clamp. Only then can the other positioning clamp be installed on the other side of the insulator string of the insulator to be replaced. Therefore, the installation process is quite cumbersome. Summary of the Invention

[0007] Therefore, it is necessary to provide a maintenance and replacement device for damaged insulators to address the problems existing in current damaged insulator replacement equipment, and to solve the problem that the use of existing damaged insulator replacement equipment is relatively cumbersome.

[0008] The above objectives are achieved through the following technical solutions:

[0009] A maintenance and replacement device for damaged insulators includes:

[0010] There are two clamping mechanisms, which are arranged with a gap between them.

[0011] There are two transmission rods, which are arranged alternately on the left and right, and the two ends of the transmission rods are connected to two clamping mechanisms respectively.

[0012] The clamping mechanism includes a housing, a left jaw, a right jaw, an upper jaw, and a transmission assembly. The left jaw is slidably connected to the left side of the housing, and the right jaw is slidably connected to the right side of the housing. The left and right jaws are arranged at a symmetrical angle. The upper jaw is slidably connected to the upper part of the housing. The transmission assembly is connected between the transmission rod, the left jaw, the right jaw, and the upper jaw.

[0013] When the transmission rod rotates, under the transmission action of the transmission assembly, the left gripper, right gripper, and upper gripper can synchronously approach or move away from the first axis.

[0014] Preferably, the transmission assembly includes a first gear, a first rack, and a second gear, each in two quantities. The two first gears are spaced apart inside the housing and are sleeved on the ends of corresponding transmission rods, configured such that the transmission rods can drive the first gears to rotate. The two second gears are spaced apart inside the housing and the two first racks are slidably disposed on the left and right sides of the housing, respectively, and the first racks mesh with the first gear and the second gear on the corresponding side.

[0015] The upper surfaces of both the left and right grippers are provided with first straight tooth grooves. The second gear on the left side meshes with the first straight tooth groove of the left gripper, and the second gear on the right side meshes with the first straight tooth groove of the right gripper.

[0016] The upper jaw has a second straight tooth groove on both the left and right sides. The second gear on the left side meshes with the second straight tooth groove on the left side of the upper jaw, and the second gear on the right side meshes with the second straight tooth groove on the right side of the upper jaw.

[0017] Preferably, when the rotational resistance experienced by the first gear is less than a preset value, the first gear rotates synchronously with the transmission rod; when the rotational resistance experienced by the first gear is greater than or equal to the preset value, the first gear rotates relative to the transmission rod.

[0018] Preferably, a key block is embedded in the inner peripheral wall of the first gear. The key block can slide elastically along the radial direction of the first gear. Keyways are opened at both ends of the transmission rod. In the initial state, the key block is located in the keyway. When the resistance of the first gear is greater than or equal to a preset value, the key block slides out from the keyway.

[0019] Preferably, the rear end of the transmission rod is provided with a threaded groove, and the inner peripheral wall of the first gear corresponding to the rear end of the transmission rod is provided with a threaded protrusion. When the resistance of the first gear corresponding to the rear end of the transmission rod is greater than or equal to a preset value, the key block slides out from the keyway, and the threaded protrusion cooperates with the threaded groove.

[0020] Preferably, the diameter of the first gear located at the rear end of the transmission rod is slightly smaller than the diameter of the first gear located at the front end of the transmission rod.

[0021] Preferably, a synchronization component is provided between the two transmission rods, which is used to make the two transmission rods rotate synchronously after the clamping mechanism and the insulator are connected.

[0022] Preferably, the synchronization component includes a timing pulley, a steel cable, and a toothed block. There are two timing pulleys, each corresponding to one of the two transmission rods and rotatably connected to the rear end of the corresponding transmission rod. The inner circumferential wall of the timing pulley is provided with a slot. The two ends of the steel cable are respectively wound around the two timing pulleys, and the toothed block is elastically connected to the keyway at the rear end of the transmission rod.

[0023] Initially, the tooth block is located inside the keyway;

[0024] When the rotational resistance experienced by the first gear is greater than or equal to the preset value, the key block disengages from the keyway, the tooth block extends out from the keyway, and engages with the slot.

[0025] Preferably, the synchronous pulley is conical, and the entry / exit point of the steel cable is located at the large end of the synchronous pulley.

[0026] Preferably, the clamping surfaces of the left gripper, right gripper, and upper gripper are inclined along the first axis.

[0027] The beneficial effects of this invention are:

[0028] This invention features a clamping mechanism and a transmission rod. When replacing an insulator, the operator rotates any one of the transmission rods. Through the transmission component, the left, right, and upper clamps move synchronously towards the axis of the steel cap, thus clamping and fixing the insulator. During this process, the operator only needs to stand on either side of the insulator to be replaced without moving their own position, making the installation process more convenient and safer. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an overall maintenance and replacement device for damaged insulators according to the present invention;

[0030] Figure 2 This is a side view of a maintenance and replacement device for damaged insulators according to the present invention;

[0031] Figure 3 for Figure 2 Sectional view of AA;

[0032] Figure 4 for Figure 2 BB section view;

[0033] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point C;

[0034] Figure 6 This is an exploded view of a maintenance and replacement device for damaged insulators according to the present invention;

[0035] Figure 7 This is a schematic diagram of the transmission rod in a maintenance and replacement device for damaged insulators according to the present invention;

[0036] Figure 8 This is a schematic diagram of the transmission component in a maintenance and replacement device for damaged insulators according to the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the first gear (located at the front end of the transmission rod) in a maintenance and replacement device for damaged insulators according to the present invention;

[0038] Figure 10 This is a schematic diagram of the connection structure between the first gear (located at the rear end of the transmission rod) and the synchronous pulley in a maintenance and replacement device for damaged insulators according to the present invention.

[0039] Figure 11 This is a half-sectional axial view of the connection part in a maintenance and replacement device for damaged insulators according to the present invention;

[0040] Figure 12 This is a schematic diagram of the structure of the first gear (located at the rear end of the transmission rod) in a maintenance and replacement device for a damaged insulator according to the present invention;

[0041] Figure 13 This is a half-sectional axial view of the synchronous pulley in a maintenance and replacement device for damaged insulators according to the present invention;

[0042] Figure 14 This is a schematic diagram of the insulator connection;

[0043] Figure 15 This is a cross-sectional view of an insulator.

[0044] in:

[0045] 100. Clamping mechanism; 110. Housing; 111. Fixing post; 120. Left jaw; 130. Right jaw; 140. Upper jaw; 150. Transmission assembly; 161. First linear toothed groove; 162. Second linear toothed groove;

[0046] 151. First gear; 152. First rack; 153. Second gear; 154. Key block; 155. Threaded protrusion; 156. Ratchet; 157. Second compression spring;

[0047] 200. Drive rod; 201. Connecting part; 210. Keyway; 220. Threaded groove; 230. Annular tooth;

[0048] 300. Synchronization component; 310. Synchronization pulley; 311. Card slot; 320. Steel cable; 330. Tooth block; 331. First compression spring;

[0049] 410. Tempered glass body; 420. Steel cap; 421. Clip-on groove; 430. Steel foot; 440. Pin;

[0050] 500. Wrench. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0052] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] The insulator structure used in high-voltage transmission lines, such as Figure 14-15As shown, the insulator includes a tempered glass body 410 (or ceramic), a steel cap 420 and a steel foot 430 respectively disposed on both sides of the tempered glass body 410. The end of the steel cap 420 is provided with a snap-fit ​​groove 421 that matches the size of the steel foot 430. In addition, the steel cap 420 is also provided with an insertion hole, which is connected to the snap-fit ​​groove 421 and is located in the bottom area of ​​the snap-fit ​​groove 421. A conical pin 440 is inserted into the insertion hole.

[0055] like Figures 1 to 13 As shown, a maintenance and replacement device for damaged insulators includes clamping mechanisms 100 and transmission rods 200. There are two clamping mechanisms 100, spaced apart front to back. There are also two transmission rods 200, spaced apart left to right, with both ends of each transmission rod connected to one of the two clamping mechanisms 100. Each clamping mechanism 100 includes a housing 110, a left gripper 120, a right gripper 130, an upper gripper 140, and a transmission assembly 150. The left gripper 120 is slidably connected to the housing. On the left side of 110, the right gripper 130 is slidably connected to the right side of the housing 110, and the left gripper 120 and the right gripper 130 are arranged at a symmetrical angle. The upper gripper 140 is slidably connected to the upper part of the housing 110. The transmission assembly 150 is connected between the transmission rod 200, the left gripper 120, the right gripper 130 and the upper gripper 140. When the transmission rod 200 rotates, under the transmission action of the transmission assembly 150, the left gripper 120, the right gripper 130 and the upper gripper 140 can synchronously approach or move away from the insulator axis.

[0056] When replacing an insulator, the operator aligns the two clamping mechanisms 100 on the front and rear sides of the maintenance and replacement equipment with the steel caps 420 on both sides of the insulator to be replaced. Then, the maintenance and replacement equipment is lowered from top to bottom until both clamping mechanisms 100 are placed on the corresponding steel caps 420. Next, the operator rotates the transmission rod 200. Under the transmission action of the transmission component 150, the left clamp 120, right clamp 130, and upper clamp 140 simultaneously approach the insulator axis until the left clamp 120, right clamp 130, and upper clamp 140 abut against the circumference of the steel caps 420. At this point, the clamping mechanism 100 connects the steel caps 420 on both sides of the insulator to be replaced. During this process, the operator only needs to stand on either side of the insulator to be replaced without moving their own position, making the installation process more convenient and safer.

[0057] After the two clamping mechanisms 100 are connected to the corresponding steel caps 420, bring the two clamping mechanisms 100 closer together to reduce the distance between the two insulators. Once the distance between the two insulators is appropriate, pull out the pin 440, remove the insulator to be replaced, install the new insulator, and then insert the pin 440 back into the new insulator. Next, allow the two clamping mechanisms 100 to clamp the corresponding steel caps 420 back to their initial positions. Finally, rotate the transmission rod 200 in the opposite direction to reset the left jaw 120, right jaw 130, and upper jaw 140 to their initial positions. At this point, the clamping mechanisms 100 no longer clamp the steel caps 420, and the staff can lift the maintenance and replacement equipment to remove it.

[0058] It is understood that the clamping mechanism 100 used in this invention can adaptively clamp steel caps 420 of various specifications, while existing positioning clamps require the replacement of inner liner of different diameters to adapt to steel caps 420 of different diameters. Therefore, this invention has better universality than the prior art.

[0059] In a further embodiment, such as Figure 3 , Figure 4 and Figure 8 As shown, the transmission assembly 150 includes two first gears 151, two first racks 152, and two second gears 153. The two first gears 151 are spaced apart inside the housing 110 and fitted onto the ends of corresponding transmission rods 200, configured such that the transmission rods 200 can drive the first gears 151 to rotate. The two second gears 153 are also spaced apart inside the housing 110. The two first racks 152 are slidably disposed on the left and right sides of the housing 110, and the first racks 152 are connected to the corresponding first gears 151 on one side. The second gear 153 is engaged. The upper surfaces of the left jaw 120 and the right jaw 130 are both provided with first straight tooth grooves 161. The second gear 153 on the left side is engaged with the first straight tooth groove 161 of the left jaw 120, and the second gear 153 on the right side is engaged with the first straight tooth groove 161 of the right jaw 130. The upper jaw 140 is provided with second straight tooth grooves 162 on both the left and right sides. The second gear 153 on the left side is engaged with the second straight tooth groove 162 on the left side of the upper jaw 140, and the second gear 153 on the right side is engaged with the second straight tooth groove 162 on the right side of the upper jaw 140.

[0060] After both clamping mechanisms 100 are placed on the corresponding steel caps 420, the operator rotates either transmission rod 200. This transmission rod 200 drives the corresponding first gear 151 to rotate synchronously. The first gear 151 drives the corresponding first rack 152 to move along its length. The movement of the first rack 152 drives the corresponding second gear 153 to rotate. The rotation of the second gear 153 drives the corresponding left gripper 120 to move closer to the first axis through the first linear tooth groove 161. At the same time, the rotation of the second gear 153 also drives the second linear tooth groove 161 to move closer to the first axis. 62 drives the upper jaw 140 to move downward, so the upper jaw 140 also moves closer to the first axis. At the same time, as the upper jaw 140 moves closer to the first axis, the upper jaw 140 drives the second gear 153 on the right side to rotate through the second linear tooth groove 162 on its other side. The rotation of the second gear 153 drives the right jaw 130 to move closer to the first axis. Thus, the left jaw 120, the right jaw 130 and the upper jaw 140 move closer to the first axis until the left jaw 120, the right jaw 130 and the upper jaw 140 abut against the circumference of the steel cap 420.

[0061] To prevent the left gripper 120, right gripper 130, and upper gripper 140 from accidentally dislodging after contact with the steel cap 420, in a further embodiment, such as Figure 5 As shown, a fixing post 111 is rotatably provided on the inner side of the outer shell 110. One end of the fixing post 111 extends to the outer side of the outer shell 110. A ratchet 156 is provided on the outer side of the fixing post 111, and the ratchet 156 is elastically connected to the outer shell 110.

[0062] When the left jaw 120, right jaw 130, or upper jaw 140 is subjected to reverse force, the second gear 153 tends to rotate in the opposite direction. However, since the second gear 153 is locked by the ratchet 156, it cannot rotate in the opposite direction. Thus, the left jaw 120, right jaw 130, and upper jaw 140 will not accidentally loosen after contacting the steel cap 420. When it is necessary for the left jaw 120, right jaw 130, and upper jaw 140 to no longer hold the steel cap 420, the operator rotates the fixing post 111. The fixing post 111 drives the ratchet 156 to rotate in the opposite direction, causing the ratchet 156 to disengage from the second gear 153. At this time, the left jaw 120, right jaw 130, and upper jaw 140 can be reset to their initial positions. Finally, the fixing post 111 is released, allowing the ratchet 156 to re-engage with the second gear 153.

[0063] In a further embodiment, when the rotational resistance experienced by the first gear 151 is less than a preset value, the first gear 151 rotates synchronously with the transmission rod 200; when the rotational resistance experienced by the first gear 151 is greater than or equal to the preset value, the first gear 151 rotates relative to the transmission rod 200.

[0064] Understandably, this arrangement ensures that the positive pressure exerted when the left jaw 120, right jaw 130, and upper jaw 140 abut against the steel cap 420 is the same and appropriate, making it convenient for operators to carry out the operation.

[0065] In a further embodiment, such as Figure 9 and Figure 12 As shown, a key block 154 is embedded in the inner peripheral wall of the first gear 151. The key block 154 can slide elastically along the radial direction of the first gear 151. Specifically, an installation groove is provided on the inner peripheral wall of the first gear 151. The bottom of the installation groove is connected to the key block 154 through the second compression spring 157. Both ends of the transmission rod 200 are provided with keyways 210. In the initial state, the key block 154 is located in the keyway 210.

[0066] In the initial state, the key block 154 extends into the keyway 210. After rotating one of the transmission rods 200, the transmission rod 200, through the keyway 210 on it, engages with the key block 154 on the first gear 151, causing the first gear 151 to rotate synchronously. When the left jaw 120, right jaw 130, and upper jaw 140 all abut against the steel cap 420, the first gear 151 cannot continue to rotate (i.e., the rotational resistance it experiences is greater than or equal to a preset value). When the operator continues to rotate the transmission rod 200, the keyway 210 of the transmission rod 200, through its guiding engagement with the rounded chamfer of the edge of the key block 154, presses the key block 154 into the mounting groove. That is, the transmission rod 200 rotates relative to the first gear 151. Therefore, the positive pressure when the left jaw 120, right jaw 130, and upper jaw 140 abut against the steel cap 420 will not increase.

[0067] To facilitate adjustment of the spacing between the two clamping mechanisms 100 and simplify the overall structure, in a further embodiment, such as... Figure 6 , Figure 7 , Figure 9 and Figure 11 As shown, the rear end of the transmission rod 200 is provided with a threaded groove 220, and the inner peripheral wall of the first gear 151 corresponding to the rear end of the transmission rod 200 is provided with a threaded protrusion 155. When the key block 154 slides out from the keyway 210, the threaded protrusion 155 and the threaded groove 220 cooperate. The inner peripheral wall of the first gear 151 corresponding to the front end of the transmission rod 200 is smooth. The front end of the transmission rod 200 is formed into a connecting part 201. The keyway 210 is opened on the peripheral surface of the connecting part 201. The key block 154, which is elastically connected to the first gear 151 corresponding to the connecting part 201, is engaged in the keyway 210.

[0068] In the initial state, the key block 154 extends into the keyway 210. When one of the transmission rods 200 is rotated, the key block 154 and the keyway 210 engage, causing the first gears 151 connected to both ends of the transmission rod 200 to rotate synchronously. Through the transmission assembly 150, both transmission rods 200 rotate synchronously, and the first gears 151 connected to both transmission rods 200 rotate synchronously with their respective transmission rods 200. When the left jaw 120, right jaw 130, and upper jaw 140 all abut against the steel cap 420, the first gears 151 can no longer rotate. Then, the operator rotates both transmission rods 200. At this time, the keyway 210 of the transmission rod 200, through its guide engagement with the rounded chamfer of the key block 154's edge, presses the key block 154 into the mounting groove. At this point, the first gear 151 at the rear end of the transmission rod 200 rotates relative to the transmission rod 200. The threaded protrusion 155 on the inner circumferential wall engages with the threaded groove 220. The rotation of the transmission rod 200 drives the first gear 151 to move along the axis of the transmission rod 200 towards the center position. Similarly, the rotation of the transmission rod 200 also causes the keyway 210 of the corresponding connecting part 201 to press the key block 154 into the mounting groove through its guide engagement with the rounded chamfer of the key block 154's edge. Therefore, the first gear 151 at the front end of the transmission rod 200 rotates relative to the connecting part 201, while the connecting part 201 is fixedly connected to the transmission rod 200. Thus, the first gear 151 and the corresponding transmission rod 200 only rotate relative to each other, thereby reducing the distance between the two clamping mechanisms 100 to facilitate insulator replacement. After the insulator replacement is completed, the distance between the two clamping mechanisms 100 is reset. At this point, the two transmission rods 200 can be rotated in the opposite direction. The specific process will not be elaborated further.

[0069] It is understandable that, since the two transmission rods 200 are spaced apart and connected to the two clamping mechanisms 100, the two transmission rods 200 limit each other so that the clamping mechanism 100 will only move along the axis of the transmission rod 200 and will not rotate.

[0070] In a further embodiment, the diameter of the first gear 151 located at the rear end of the transmission rod 200 is slightly smaller than the diameter of the first gear 151 located at the front end of the transmission rod 200.

[0071] This configuration allows the clamping mechanism 100 at the front end of the transmission rod 200 to first abut against the steel cap 420, and the clamping mechanism 100 at the rear end of the transmission rod 200 to abut against the steel cap 420, thereby preventing axial sliding between the clamping mechanism 100 and the steel cap 420.

[0072] Since simultaneously rotating both transmission rods 200 at the same speed is challenging, to address this issue in a further embodiment, such as... Figure 6 , Figures 10-13 As shown, a synchronization assembly 300 is provided between the two transmission rods 200. The synchronization assembly 300 is used to enable the two transmission rods 200 to rotate synchronously after the clamping mechanism 100 is connected to the insulator. The synchronization assembly 300 includes a synchronous pulley 310, a steel cable 320, and a toothed block 330. There are two synchronous pulleys 310, each corresponding to one of the two transmission rods 200, and they are rotatably connected to the rear end of the corresponding transmission rod 200, that is, rotatably connected to the outside of the connecting part 201. The synchronous pulley 310 is a cylindrical pulley with an opening on its inner circumferential wall. A slot 311 is provided, and the two ends of the steel cable 320 are respectively wound on two synchronous pulleys 310, and the winding directions of the steel cable 320 on the two synchronous pulleys 310 are opposite. The tooth block 330 is elastically connected to the slide groove at the rear end of the transmission rod 200. Specifically, the tooth block 330 is connected to the slide groove through the first compression spring 331. In the initial state, the tooth block 330 is located inside the slide groove. When the rotational resistance of the first gear 151 is greater than or equal to the preset value, the key block 154 disengages from the keyway 210, and the tooth block 330 extends out from the slide groove and engages with the slot 311.

[0073] In the initial state, the key block 154 corresponding to the first gear 151 at the front end is engaged in the keyway 210 of the connecting part 201. The second compression spring 157 in the first gear 151 pushes the tooth block 330 to move towards the axis of the connecting part 201, so that the tooth block 330 is located in the slide groove, and the teeth of the tooth block 330 do not contact the slot 311. At this time, the first compression spring 331 is in a compressed state. When the left gripper 120, right gripper 130 and upper gripper 140 abut against the steel cap 420, the first gear 151 cannot rotate (that is, the rotational resistance of the first gear 151 is greater than the preset value). At this time, the operator rotates the transmission rod 200 corresponding to the synchronous pulley 310 wound around the steel cable 320, and the key block 154 disengages from the keyway 210 corresponding to the connecting part 201. Under the action of the first compression spring 331, the tooth block 330 moves along the slide groove away from the axis of the keyway 210, so the teeth of the tooth block 330 and the slot 311 are engaged. When the slots 311 are engaged, the transmission rod 200 drives the corresponding connecting part 201 to rotate. The connecting part 201 drives the synchronous pulley 310 to rotate synchronously. The synchronous pulley 310 drives another synchronous pulley 310 to rotate synchronously through the steel cable 320 wound on it. The synchronous pulley 310 drives the connecting part 201 to rotate synchronously through the engagement of the slot 311 opened on its inner circumference with the tooth block 330 on the corresponding side. The connecting part 201 then drives the corresponding transmission rod 200 to rotate, so that the two transmission rods 200 rotate synchronously.

[0074] In other embodiments, such as Figure 10 As shown, the synchronous pulley 310 is conical, and the entry / exit position of the steel cable 320 is located at the large end of the synchronous pulley 310.

[0075] It is understandable that the conical synchronous pulley 310 has the function of automatic cable arrangement. Therefore, for the synchronous pulley 310 with the steel cable 320 wound around it, the wound steel cable 320 will be arranged sequentially from the small end to the large end of the synchronous pulley 310. In this way, the thickness of the steel cable 320 arranged at the large end of the synchronous pulley 310 will be thinner. This will reduce the difference in diameter between the point where the steel cable 320 is wound in and the point where it is wound out. Therefore, designing the synchronous pulley 310 as conical will result in better consistency of the synchronous pulley 310's rotational speed.

[0076] Furthermore, in order to ensure that the steel cable 320 is wound into and out of the synchronous pulley 310 at the large end, mechanical structures such as baffles and guide wheels can be set inside the housing 110 to force the steel cable 320 to always be wound into / out of the two synchronous pulleys 310 at a fixed position at the large end.

[0077] In a further embodiment, the diameter of the first gear 151 located at the front end of the transmission rod 200 is slightly larger than the diameter of the first gear 151 located at the rear end of the transmission rod 200.

[0078] This arrangement allows the immovable clamping mechanism 100 to clamp the steel cap 420 first, followed by the movable clamping mechanism 100. This ensures that the front clamping mechanism 100 clamps the steel cap 420 first, preventing axial wear of the steel cap 420 when the rear clamping mechanism 100 moves.

[0079] In a further embodiment, the clamping surfaces of the left jaw 120, right jaw 130, and upper jaw 140 are in contact with the insulator. Specifically, the clamping surfaces of the left jaw 120, right jaw 130, and upper jaw 140 are in contact with the outer peripheral surface of the steel cap 420 of the insulator. This can increase clamping stability and prevent axial sliding between the clamping mechanism 100 and the steel cap 420.

[0080] In a further embodiment, such as Figure 7 As shown, the outer peripheral wall of the transmission rod 200 is provided with annular teeth 230.

[0081] The ring tooth 230 is designed to facilitate the rotation of the transmission rod 200 by the operator. The operator can hold the wrench 500 so that the inner tooth surface of the wrench 500 engages with the ring tooth 230, and then rotate the wrench 500 to rotate the transmission rod 200.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A maintenance and replacement device for damaged insulators, characterized in that The utility model relates to an insulator clamping device, including: Clamping mechanism has two, two clamping mechanism is arranged in front and back interval; Transmission rod has two, two transmission rods are arranged in left and right interval, and the both ends of transmission rod are connected with two clamping mechanism correspondingly; Clamping mechanism includes shell, left jaw, right jaw, upper jaw and transmission assembly, left jaw is connected in the left side of shell slidingly, right jaw is connected in the right side of shell slidingly, and left jaw and right jaw are symmetrically arranged at angle, upper jaw is connected in the upper portion of shell slidingly, and transmission assembly is connected between transmission rod, left jaw, right jaw and upper jaw; When transmission rod rotates, under the transmission effect of transmission assembly, left jaw, right jaw and upper jaw can be synchronous to approach or be away from insulator axis; Two first gear are arranged in the inside of shell in left and right interval, and the both ends of corresponding transmission rod are sleeved with two first gear, and transmission rod can drive first gear to rotate, two second gear are arranged in the inside of shell in left and right interval, two first rack are arranged in the left and right sides of shell slidingly, and first rack is engaged with corresponding first gear and second gear on one side; The upper surface of left jaw and right jaw is provided with first straight tooth slot, the second gear on left side is engaged with the first straight tooth slot of left jaw, and the second gear on right side is engaged with the first straight tooth slot of right jaw; The left and right sides of upper jaw are provided with second straight tooth slot, the second gear on left side is engaged with the second straight tooth slot on the left side of upper jaw, and the second gear on right side is engaged with the second straight tooth slot on the right side of upper jaw.

2. The maintenance and replacement device for damaged insulators according to claim 1, characterized in that When the rotation resistance that first gear receives is less than preset value, first gear rotates with transmission rod, when the rotation resistance that first gear receives is greater than or equal to preset value, first gear relatively rotates with transmission rod.

3. The maintenance and replacement device for damaged insulators according to claim 2, characterized in that The inner peripheral wall of first gear is embedded with key block, key block can elastically slide along the radial direction of first gear, and the both ends of transmission rod are provided with key groove, in initial state, key block is located in key groove, when the resistance that first gear receives is greater than or equal to preset value, key block slides out from key groove.

4. The maintenance and replacement device for damaged insulators according to claim 3, characterized in that The rear end of transmission rod is provided with threaded groove, the inner peripheral wall of corresponding first gear on the rear end of transmission rod is provided with threaded protrusion, when the resistance that corresponding first gear on the rear end of transmission rod receives is greater than or equal to preset value, key block slides out from key groove, and threaded protrusion is matched with threaded groove.

5. The maintenance and replacement device for damaged insulators according to claim 4, characterized in that The diameter of first gear on the rear end of transmission rod is slightly less than the diameter of first gear on the front end of transmission rod.

6. The maintenance and replacement device for damaged insulators according to claim 5, characterized in that Synchronous assembly is arranged between two transmission rods, and is used to make two transmission rods rotate synchronously after the connection of clamping mechanism and insulator is completed.

7. The maintenance and replacement device for damaged insulators according to claim 6, characterized in that The synchronous assembly includes synchronous pulley, steel cable and tooth block, the synchronous pulley has two, and the two synchronous pulleys are corresponding with two transmission rods, and are rotatably connected to the rear end of corresponding transmission rod, the inner peripheral wall of synchronous pulley is provided with clamping groove, the both ends of steel cable are wound on two synchronous pulleys respectively, and the tooth block is elastically connected to the key groove in the rear end of transmission rod. In initial state, the tooth block is located in the key groove. When the rotation resistance that first gear receives is greater than or equal to preset value, the key block is separated from the key groove, the tooth block is stretched out from the key groove, and is clamped with the clamping groove.

8. The maintenance and replacement device for damaged insulators according to claim 7, characterized in that The synchronous pulley is conical, and the winding position of steel cable is located at the large end of synchronous pulley.

9. The apparatus for maintenance and replacement of a damaged insulator according to claim 1, wherein The clamping surfaces of the left clamping jaw, the right clamping jaw and the upper clamping jaw are in contact with the outer circumferential surface of the insulator.

Images