A support device for live replacement of insulators of power transmission line towers

Abstract

The application discloses a kind of support devices for live replacement of transmission line tower insulator, belong to live working tool field.The device includes fixed base, support structure, wire loosening mechanism and automatic locking structure.Base is adapted to a variety of cross arm tower type by double L type clamping structure;Support structure is constructed by insulating tube, which extends the working space outward by a safety distance of not less than 0.6 meters;During operation, the traction rope is driven by hand winch, and the automatic locking structure is used to realize reliable lifting of the wire.The hook is automatically locked to prevent falling under stress, and it is automatically opened after unloading.The application solves the core bottleneck of insufficient safety distance caused by 35kV tower head compactness, realizes lightweight of the whole set of device, single independent operation, and fills the equipment blank of 35kV straight line tower insulator replacement without power outage.

Description

Technical Field

[0001] This invention relates to the field of live-line working tools for power transmission lines, and in particular to a support device for live-line replacement of insulators on transmission line towers. Background Technology

[0002] With the completion of the integration of county-level power supply units and new power resources, the stock of 35kV transmission lines in the area has increased significantly. These lines generally have structural shortcomings, are mostly powered by a single source, and due to their long service life, defects such as insulator spontaneous explosion and insulation deterioration are common. If conventional power outage maintenance is carried out, it can easily lead to large-scale power outages and significant economic losses in the area.

[0003] However, when carrying out live-line work on insulators of straight-line towers of 35kV lines, the core bottleneck problem is "insufficient safety distance": the effective insulation length of existing 35kV line insulator strings is only 0.438m, which is far from meeting the minimum safety distance standard of 0.6m between personnel and live parts stipulated in the "Safety Regulations".

[0004] Currently, the industry's existing mature technologies and equipment are mostly focused on high voltage levels of 110~500kV, such as the sliding rail type hoisting device disclosed in prior art document CN206619849U, or the motor-driven push rod device disclosed in CN114284930A. These conventional tools are heavy and complex, and are only suitable for high voltage, large tower heads, and ample insulation distances in operating scenarios. When these bulky mechanical structures are applied to the narrow tower heads, compact layout, and small insulation distances of 35kV lines, they not only fail to expand the working space by more than 0.6m, but may even further compress the range of movement for operators.

[0005] Therefore, the industry urgently needs a lightweight special equipment specifically designed for 35kV compact tower heads, capable of independently expanding the safety distance and easy for single-person operation. Summary of the Invention

[0006] In view of this, this application provides a support device for live replacement of insulators on transmission line towers. The main purpose is to solve the technical problem that the existing 35kV tower head structure is compact and narrow, and the safety distance between personnel and live parts cannot be met during operation, which poses a major safety hazard. At the same time, it solves the technical problems that existing tools cannot be compatible with various crossarm sections, the difficulty of high-altitude operation coordination, and the easy detachment of conductors.

[0007] According to the present invention, a support device for live replacement of insulators on transmission line towers is provided, comprising: a fixed base, wherein the fixed base is disposed on the crossarm of a straight tower; A support structure, the bottom of which is fixedly installed on the fixed base, and the support structure extends away from the fixed base to create a safe working space of not less than 0.6 meters. A wire take-up mechanism includes a winding assembly and a traction rope. The winding assembly is mounted on the fixed base or support structure. One end of the traction rope is released from the winding assembly and guided through the top of the support structure. The traction rope is an insulator. An automatic locking structure is suspended from the end of the traction rope. The automatic locking structure has a mechanical linkage constraint structure. When the automatic locking structure hooks the wire and is subjected to a downward force greater than a preset threshold, the mechanical linkage constraint structure is triggered to automatically close the opening of the hook. When the force is released, the mechanical linkage constraint structure automatically resets to open the opening of the hook.

[0008] Furthermore, the support structure includes a vertical insulating rod, a horizontal support rod, and a support diagonal rod; The bottom end of the vertical insulating rod and one end of the horizontal support rod are both rigidly connected to the fixed base. The two ends of the support diagonal rod are respectively connected to the top of the vertical insulating rod and the other end of the horizontal support rod. The vertical insulating rod, the horizontal support rod and the support diagonal rod form a triangular truss structure in space.

[0009] Furthermore, the wire take-up mechanism also includes an insulating pulley assembly, which is rotatably mounted at the top node of the support structure; The winding assembly is a hand-cranked winch fixedly mounted on the fixed base; The traction rope is led out from the hand-cranked winch, passes through the insulated pulley block, and extends vertically downward to the automatic locking structure.

[0010] Furthermore, the automatic locking structure includes: a hook body with a receiving groove, a load-bearing pull rod slidably mounted on the hook body, and a side spring; the upper end of the load-bearing pull rod is connected to the traction rope, and the lower end has a hanging part for supporting the wire; The side spring is supported between the hook and the load-bearing rod, and is used to provide elastic potential energy for the load-bearing rod to slide upward and return to its original position.

[0011] Furthermore, the automatic locking structure also includes a locking baffle pivotally connected to the opening of the hook body; A cam-groove engagement structure or a linkage transmission structure is provided between the load-bearing tie rod and the locking baffle to convert the relative linear displacement of the load-bearing tie rod into the rotational displacement of the locking baffle.

[0012] Furthermore, the hook-body load-bearing tie rod and the locking baffle are both made of epoxy glass cloth laminate, the support structure is an insulator, and its key insulating components have a lightning impulse withstand voltage greater than or equal to 220kV and a power frequency breakdown voltage greater than or equal to 220kV.

[0013] Furthermore, the specific structure of the fixed base includes: a base plate; a double L-shaped locking structure, which is symmetrically slidably fitted into the bottom guide groove of the base plate; and a locking bolt, which passes through the base plate and is threadedly engaged with the double L-shaped locking structure. By adjusting the spacing between the double L-shaped interlocking structures and locking them with the locking bolts, the fixed base can be adapted to clamp angle steel crossbeams in the shape of "┕", "┐" or "П".

[0014] Furthermore, the main body of the support structure is made of high-strength insulating tubing, wherein the connecting parts between the vertical insulating rod, the horizontal support rod, and the support diagonal rod are made of aluminum alloy, and the total weight of the support device is less than or equal to 25 kg.

[0015] Furthermore, the insulated pulley assembly includes a 2×2 pulley structure; the traction rope is an insulated rope with a diameter of 12mm; and the hand-cranked winch is equipped with a self-locking ratchet mechanism, so that the tightening adjustment accuracy of the traction rope is within the range of less than or equal to 5mm.

[0016] Furthermore, the cam slide groove mating structure includes a curved guide groove formed on the locking baffle and a transmission pin fixed on the load-bearing tie rod; When the weight of the conductor forces the load-bearing rod to move downward, the transmission pin slides in the curved guide groove, forcibly driving the locking baffle to cross the hook opening to form a physical closed loop.

[0017] Beneficial effects: This application discloses a support device for live replacement of insulators on transmission line towers. The support structure extends outward, forcibly shifting the conductor suspension point in space, making the working distance much greater than 0.6 meters, thus completely overcoming the "space forbidden zone" of live work on 35kV compact tower heads.

[0018] This application utilizes the internal mechanical linkage of the automatic locking structure to directly convert the gravity of the conductor into a locking driving force, automatically locking when the force is applied and automatically resetting when the force is released. This eliminates the traditional, cumbersome process of binding wires or inserting pins, and prevents the fatal danger of accidental conductor slippage.

[0019] This application, by adjusting the double L-shaped locking structure, allows a single unit to directly cover mainstream profiles such as "┕", "┐", and "П". Employing a triangular truss design combining aluminum alloy and insulating materials, and without permanent deformation after passing a 1.5 times rated load test, the entire unit weighs less than or equal to 25 kg, with the core components weighing less than or equal to 15 kg after assembly. This allows a single tower electrician to carry it independently to mountainous areas to complete wire unloading operations.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0021] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] In the attached diagram: Figure 1 This is a schematic diagram of the overall structure of the support device for live replacement of insulators on transmission line towers provided in an embodiment of the present invention; Figure 2 This diagram shows the overall assembly structure of the support device for live replacement of insulators on transmission line towers provided in an embodiment of the present invention. Figure 3 An enlarged schematic diagram of another structure in the fixed base provided in an embodiment of the present invention is shown, illustrating the structure of the first angle steel tower; Figure 4 An enlarged schematic diagram of the structure in the fixed base provided in an embodiment of the present invention is shown, illustrating the structure of the second angle steel tower; Figure 5 This shows a cross-sectional view of the internal mechanical linkage of the automatic locking structure provided in an embodiment of the present invention in the "normally open state without force"; Figure 6 A cross-sectional view of the internal mechanical linkage of the automatic locking structure provided in an embodiment of the present invention under "forced locking state" is shown. Figure 7 This invention provides a schematic diagram of the overall structure of a support device for live replacement of insulators on transmission line towers, according to another embodiment of the present invention. Figure 8 An enlarged schematic diagram of the structure in the fixed base provided in an embodiment of the present invention is shown, illustrating the structure of the third angle steel tower.

[0023] Reference numerals: 100-Fixed base; 110-Base plate; 120-Double L-shaped locking structure; 130-Locking bolt; 210-Vertical insulating rod; 220-Horizontal support rod; 230-Supporting diagonal rod; 310-Winding assembly; 320-Insulating pulley block; 330-Traction rope; 400-Automatic locking structure; 410-Hook body; 420-Bearing tie rod; 430-Locking baffle; 440-Side spring; 150-First angle steel tower; 160-Second angle steel tower; 161-Third angle steel tower; 170-Insulator; 180-Crossarm; 190-Clamping device; 200-Ribbon structure.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example 1: See Figures 1-7As shown, this invention provides a support device for live-line replacement of insulators on transmission line towers. From bottom to top, the assembly structure of the support device is as follows: the bottom layer is a fixed base 100, which is mounted on the crossarm of a straight tower. The core load-bearing body of the fixed base 100 is a base plate 110. A guide groove is arranged at the lower part of the base plate 110, and two sets of opposing double L-shaped locking structures 120 slide within the guide groove and are secured by locking bolts 130 on the side. In this application, the fixed base 100 is an angle steel tower, which includes, but is not limited to, a first angle steel tower 150, a second angle steel tower 160, and a third angle steel tower. Wherein, as... Figure 3 As shown, the first angle steel tower 150 is in the shape of a "┕", as... Figure 4 As shown, the second angle steel tower 160 is in the shape of a "┐", as... Figure 8 As shown, the third angle steel tower 161 is shaped like a "П". Regardless of whether the angle steel tower on site is shaped like a "┕", "┐" or "П", the operators only need to adjust the spacing of the double L-shaped locking structure 120 on the device and tighten the bolts to firmly lock the base 100 onto the crossarm like a "vier".

[0029] In one feasible embodiment, the middle layer of the support device is a support structure, the bottom of which is fixedly mounted on the fixed base 100, and the support structure extends away from the fixed base 100. Specifically, the fixed base 100 includes: a base plate 110; double L-shaped alloy clips 120, which are symmetrically slidably fitted into the bottom guide grooves of the base plate 110; and a locking bolt 130, which passes through the base plate 110 and is threadedly engaged with the double L-shaped alloy clips 120; the spacing between the double L-shaped alloy clips 120 is adjusted and locked by the locking bolt 130.

[0030] In this embodiment, the support structure includes a vertical insulating rod 210, a horizontal support rod 220, and a supporting diagonal rod 230. The bottom end of the vertical insulating rod 210 and one end of the horizontal support rod 220 are rigidly connected to the fixed base 100, wherein the vertical insulating rod 210 is vertically anchored to the base plate 110 of the rigid base 100. The two ends of the supporting diagonal rod 230 are respectively connected to the top of the vertical insulating rod 210 and the other end of the horizontal support rod 220. The vertical insulating rod 210, the horizontal support rod 220, and the supporting diagonal rod 230 form a triangular truss structure in space. The structural dimensions are precisely set as follows: a structural height of approximately 0.6 meters and a horizontal insulating rod length of 0.8 to 1 meter. This static topology of geometric dimensions constructs a spatial defense line that forcibly crosses the 0.6-meter insulation safety red line.

[0031] In one feasible embodiment, the top layer of the support device is a wire take-up mechanism, which includes a traction rope 330, a winding assembly 310, and an insulated pulley block 320. The winding assembly 310 is disposed on the fixed base 100 or the support structure, and one end of the traction rope 330 is released from the winding assembly 310 and guided through the top of the support structure. The wire take-up mechanism also includes the insulated pulley block 320, which is rotatably disposed at the top node of the support structure; the winding assembly 310 is a hand-cranked winch fixedly mounted on the fixed base 100; the traction rope 330 is led out from the hand-cranked winch, passes through the insulated pulley block 320, and extends vertically downward to the automatic locking structure 400. The hand-cranked winch is equipped with a self-locking ratchet mechanism, so that the tightening adjustment accuracy of the traction rope 330 is within the range of less than or equal to 5mm.

[0032] In this embodiment, the insulated pulley assembly 320 consists of two sets of insulated pulleys in a 2×2 configuration. These pulleys are connected to the top of a triangular structure formed by the vertical insulating rod 210, the horizontal support rod 220, and the supporting diagonal rod 230 via aluminum alloy clamps. The winding assembly 310 is a hand-cranked winch, rigidly connected to the side of the fixed base 100 for easy maneuvering. A high-strength, insulated traction rope 330 with a diameter of 12mm is wound around the winding assembly 310, passes through the insulated pulley assembly 320, and hangs freely, connecting to the automatic locking structure 400 at the end.

[0033] In one feasible embodiment, the support device further includes an automatic locking structure 400, which includes a first locking structure fixedly mounted at the connection between the vertical insulating rod 210 and the horizontal support rod 220; and a second locking structure movably suspended from the end of the traction rope 330 for suspending the rod-shaped structure and / or the insulator 170. The automatic locking structure 400 includes a hook 410 with a receiving groove, a load-bearing pull rod 420 slidably mounted on the hook 410, and a side spring 440. The automatic locking structure 400 has a mechanical linkage constraint structure. When the automatic locking structure 400 hooks a conductor and is subjected to a downward force greater than a preset threshold, the mechanical linkage constraint structure is triggered to automatically close the opening of the hook 410; when the force is released, the mechanical linkage constraint structure automatically resets to open the opening of the hook 410.

[0034] In this embodiment, the upper end of the load-bearing rod 420 is connected to the traction rope 330, and the lower end has a hanging part for supporting the wire; the side spring 440 is supported between the hook body 410 and the load-bearing rod 420, and is used to provide elastic potential energy for the load-bearing rod 420 to slide upward and reset.

[0035] The automatic locking structure 400 further includes: a locking baffle 430 pivotally connected to the opening of the hook body 410; a cam groove engagement structure or a linkage transmission structure is provided between the load-bearing tie rod 420 and the locking baffle 430 to convert the relative linear displacement of the load-bearing tie rod 420 into the rotational displacement of the locking baffle 430.

[0036] In this embodiment, the hook body 410, the load-bearing rod 420, and the locking baffle 430 are all made of epoxy glass cloth laminate. Their key insulating components have a lightning impulse withstand voltage greater than or equal to 220kV and a power frequency breakdown voltage greater than or equal to 220kV. The main body of the support structure is an insulating tube, wherein the connecting parts between the vertical insulating rod 210, the horizontal support rod 220, and the support diagonal rod 230 are made of aluminum alloy. The total weight of the support device is less than or equal to 25kg. The cam-slide groove mating structure includes a curved guide groove formed on the locking baffle 430 and a transmission pin fixed to the load-bearing rod 420. When the weight of the conductor forces the load-bearing rod 420 to move downwards, the transmission pin slides within the curved guide groove, forcibly driving the locking baffle 430 across the opening of the hook body 410 to form a physical closed loop.

[0037] In one feasible implementation, the core of this application lies in the dynamic coupling of the conductor load control path and the anti-derailment mechanical feedback: 1. Insulator Unloading: The tower worker cranks the winding assembly 310 (hand-cranked winch) with one hand. The manual torque is amplified and self-locked through the winch gear pair, converting it into linear tension in the traction rope 330. The rope tension lifts the automatic locking structure 400 upwards via the insulated pulley group 320. When the hook 410 of the second locking structure contacts the rod-shaped structure 200 and begins to bear the weight of the rod-shaped structure 200 (typically several hundred kilograms), the force on the rod-shaped structure 200 gradually shifts from the original crossarm to the triangular truss network formed by the vertical insulating rod 210, the horizontal support rod 220, and the supporting diagonal rod 230 of this invention. Thanks to its self-locking ratchet, the winding accuracy is within 5mm, and the original 35kV suspension insulator 170 is completely unloaded and in a relaxed state, allowing the worker to replace it without obstruction from a safe distance of 0.6m.

[0038] II. Hook self-adaptive interlocking: See below Figure 5 and Figure 6 The automatic locking structure 400 is not only a mounting point, but also a "mechanical intelligent logic door". Before being subjected to force, the side spring 440 pushes the load-bearing rod 420 upward to the top limit, and the linkage mechanism drives the locking baffle 430 to deflect and hide. At this time, the hook body 410 is in a "normally open" state, and the operator can easily hook it into the wire as if it were a regular hook.

[0039] When the winding assembly 310 exerts force and the load-bearing tie rod 420 is subjected to a large downward pressure from the conductor, the force exceeds the preload of the side spring 440. The load-bearing tie rod 420 overcomes the elastic force of the side spring 440 and slides downward relative to the hook body 410. During the sliding process, the drive pin on the side is forced to move within the cam groove, converting the downward displacement into rotational torque, instantly "throwing out" the locking baffle 430, completely sealing the opening of the hook body 410 to form an "O"-shaped closed loop. As long as the weight of the rod-shaped structure 200 exists, the locking baffle 430 is in an absolutely locked state, completely isolating the risk of slippage in the air. When the operation is completed, the winch releases the wire, the gravity of the rod-shaped structure 200 returns to the original insulator 170, the side spring 440 extends, the locking baffle 430 automatically retracts, and the hook body 410 returns to its normally open state, making it easy to remove.

[0040] Example 2: This example discloses variations and equivalent replacements of the device of this application. Based on the system-level defense considerations of the support device disclosed in Embodiment 1, this embodiment provides an equivalent replacement structure: namely, an equivalent replacement for the hook locking trigger mechanism. Embodiment 1 adopts a "linear sliding - cam groove rotation" conversion structure. In the modified scheme, the automatic locking mechanism 400 can be replaced with a "gear and rack linkage structure," that is, a linear rack is engraved on the load-bearing tie rod 420, and a sector gear is installed on the shaft of the locking baffle 430. When sliding under force, the rack directly engages and drives the sector gear to rotate 90 degrees to block the opening, achieving the same purely mechanical self-locking function.

[0041] In one feasible implementation, an equivalent replacement for the base fixing method is provided: for a few cylindrical cement pole crossarms, the double L-shaped locking structure 120 can be removed, and a U-shaped adapter plate can be added to the bottom of the base plate 110 using high-strength countersunk screws. The adapter plate is lined with anti-slip rubber pads and is secured circumferentially with double-headed bolts and U-shaped clamps, ensuring 100% coverage of this device in various legacy power grids.

[0042] Example 3: Based on the system-level defense considerations of the support device disclosed in Examples 1 and 2, this example provides an extended structure. For example... Figure 7 As shown, the insulated pulley block 320 consists of two sets of insulated pulley blocks connected in parallel, each consisting of a 2×2 group. Place, It is connected to the top of the triangular structure formed by the vertical insulating rod 210, the horizontal support rod 220 and the support diagonal rod 230 by an aluminum alloy clamp pin; the high-strength insulating traction rope 330 with a diameter of 12mm is wound around the winding assembly 310, and after passing through the insulating pulley group 320, the traction rope 330 hangs down freely and is connected to the automatic locking structure 400 at the end, which is the second locking structure.

[0043] In this embodiment, such as Figure 7As shown, the two sets of grooves in the insulating pulley block 320 correspond to two independent traction rope paths. A high-strength insulating traction rope 330 with a diameter of 12mm is wound around the winding assembly 310, passes through one set of grooves in the insulating pulley block 320, and hangs freely, connecting to the automatic locking structure 400 at the end, i.e., the second locking structure, for suspending the conductor. A second traction rope 331 is wound around the other set of grooves in the insulating pulley block. One end of the second traction rope 331 passes through the insulating pulley block and hangs freely for traction by the operator, while the other end is connected to the insulator 170 to be replaced.

[0044] If the insulator 170 is obstructed by the crossarm 180 during its vertical transport and disassembly / removal, the disassembly / removal operation will be interrupted. To solve this problem, in this embodiment, when disassembling the insulator 170, ground workers slowly release the second traction rope 331 to smoothly lower the insulator 170 to the ground; when replacing it, ground workers fix the new insulator to the end of the second traction rope 331 on the ground, and then personnel on the tower or on the ground work together to slowly lift it to the disassembly / removal position for installation.

[0045] In this embodiment, one end of the insulator 170 is connected to the rod-shaped structure 200 via a clamping device 190. The clamping device 190 has a suspension clamp, which is used to relieve force during disassembly, allowing the insulator 170 to detach from the rod-shaped structure 200, thereby enabling a more convenient and faster insulator replacement operation.

[0046] This embodiment uses the parallel arrangement of two traction ropes to enable the conductor suspension and insulator transfer to be completed collaboratively on the same support device, avoiding the extra steps of repeatedly disassembling and assembling the support structure, and further improving the efficiency of high-altitude live insulator replacement.

[0047] The above description is merely a preferred embodiment of the present invention and is 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-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. 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 support device for live-line replacement of insulators on transmission line towers, characterized in that, include: A fixed base (100) is provided on the crossarm of a straight tower; A support structure, the bottom of which is fixedly mounted on the fixed base (100), and the support structure extends in a direction away from the fixed base (100); The conductor take-up mechanism includes at least a traction rope (330). And an automatic locking structure (400) suspended at the end of the traction rope (330); The automatic locking structure (400) has a mechanical linkage constraint structure. When the automatic locking structure (400) hooks the wire and is subjected to a downward force greater than a preset threshold, the mechanical linkage constraint structure is triggered to automatically close the opening of the hook body (410). When the pulling force is released, the mechanical linkage constraint structure automatically resets to open the opening of the hook body (410).

2. The support device according to claim 1, characterized in that: The support structure includes a vertical insulating rod (210), a horizontal support rod (220), and a support diagonal rod (230). The bottom end of the vertical insulating rod (210) and one end of the horizontal support rod (220) are rigidly connected to the fixed base (100). The two ends of the support diagonal rod (230) are respectively connected to the top of the vertical insulating rod (210) and the other end of the horizontal support rod (220). The vertical insulating rod (210), the horizontal support rod (220) and the support diagonal rod (230) form a triangular truss structure in space.

3. The support device according to claim 2, characterized in that: The wire take-up mechanism also includes a winding assembly (310), which is located on the fixed base (100) or support structure. One end of the traction rope (330) is released from the winding assembly (310) and guided by the top of the support structure.

4. The support device according to claim 3, characterized in that: The wire take-up mechanism also includes an insulating pulley group (320), which is rotatably mounted at the top node of the support structure; The winding assembly (310) is a hand-cranked winch fixedly mounted on the fixed base (100); The traction rope (330) is led out from the hand-cranked winch, passes through the insulated pulley block (320), and extends vertically downward to the automatic locking structure (400).

5. The support device according to claim 4, characterized in that, The automatic locking structure (400) includes: a hook body (410) with a receiving groove, a load-bearing pull rod (420) slidably mounted on the hook body (410), and a side spring (440). The upper end of the load-bearing tie rod (420) is connected to the traction rope (330), and the lower end has a hanging part for supporting the wire; The side spring (440) is supported between the hook (410) and the load-bearing rod (420) and is used to provide elastic potential energy for the load-bearing rod (420) to slide upward and reset.

6. The support device according to claim 5, characterized in that, The automatic locking structure (400) further includes a locking baffle (430) pivotally connected to the opening of the hook body (410). A cam groove engagement structure or a linkage transmission structure is provided between the load-bearing tie rod (420) and the locking baffle (430) to convert the relative linear displacement of the load-bearing tie rod (420) into the rotational displacement of the locking baffle (430).

7. The support device according to claim 1, characterized in that, The specific structure of the fixed base (100) includes: Base plate (110); A double L-shaped locking structure (120) is symmetrically slidably fitted into the bottom guide groove of the base plate (110); and, A locking bolt (130) is inserted into the base plate (110) and threaded into the double L-shaped locking structure (120); The spacing between the double L-shaped locking structures (120) is adjusted and locked by the locking bolts (130).

8. The support device according to claim 4, characterized in that: The insulated pulley assembly (320) includes a first pulley assembly and a second pulley assembly arranged side by side; The traction rope (330) is connected to the automatic locking structure (400) after passing through the first pulley group. The support device also includes a second traction rope (331), which is wound around the second pulley block. One end of the second traction rope (331) is a free operating end, and the other end is used to connect to the insulator (170) to be replaced.

9. The support device according to claim 8, characterized in that: It also includes a clamping device (190) having a hanging wire clamp; One end of the clamping device (190) is connected to the rod-shaped structure (200), and the other end is connected to the insulator (170). The suspension clamp is used to relieve the force on the insulator (170) during disassembly.

10. The support device according to claim 6, characterized in that: The cam slide groove mating structure includes a curved guide groove formed on the locking baffle (430) and a transmission pin fixed on the load-bearing tie rod (420); When the weight of the conductor forces the load-bearing rod (420) to move downward, the transmission pin slides in the curved guide groove, forcibly driving the locking baffle (430) to cross the opening of the hook body (410) to form a physical closed loop.

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