Force bearing device

Abstract

The utility model provides a force bearing device which is used for replacing a cross arm insulator installed on a power transmission tower, the force bearing device comprises an adjusting piece, a force bearing piece and a connecting piece which are connected in sequence, one end of the adjusting piece is used for being fixedly connected with a tower body of the power transmission tower, the other end of the adjusting piece is fixedly connected with one end of the force bearing piece, and the other end of the force bearing piece is fixedly connected with the connecting piece. The adjusting piece is used for adjusting the length of the force bearing device. The force bearing device is used for operation and maintenance of the composite cross arm on the power transmission tower and can replace a cross arm insulator temporary support to be replaced, the operation and maintenance process is simplified, and the operation and maintenance efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of power transmission, and particularly to a load-bearing device. Background Art

[0002] Currently, for the operation and maintenance of composite cross arms, it is often necessary to separate and lift the conductors and then remove the entire composite cross arm as a whole, transport the entire composite cross arm to the ground for replacing the cross arm insulators, and then lift and assemble the composite cross arm at high altitude. The overall steps are cumbersome, and the construction difficulty is high and the cost is high. Utility Model Content

[0003] In view of this, this application provides a load-bearing device for the operation and maintenance of composite cross arms on transmission towers. It can temporarily support in place of the cross arm insulators to be replaced, without the need to separate or remove the conductors originally hung on the high-voltage end of the composite cross arm, nor the need to remove the entire composite cross arm. It can remove and replace a single cross arm insulator, simplify the operation and maintenance process, and improve the operation and maintenance efficiency.

[0004] To solve the above problems, the technical solution adopted in this application is: to provide a load-bearing device for replacing the cross arm insulators installed on a transmission tower. The load-bearing device includes an adjusting member, a load-bearing member, and a connecting member connected in sequence. One end of the adjusting member is used for fixedly connecting with the tower body of the transmission tower, and the other end is fixedly connected with one end of the load-bearing member. The other end of the load-bearing member is fixedly connected with the connecting member. The adjusting member is used for adjusting the length of the load-bearing device.

[0005] Wherein, the adjusting member includes an outer cavity and an inner cavity arranged coaxially. Both the outer cavity and the inner cavity are columnar structures. The outer cavity is a hollow columnar structure, and the inner cavity is located in the hollow inner cavity of the outer cavity. The relative positions of the outer cavity and the inner cavity along their axial directions are adjustable.

[0006] Wherein, both ends of the adjusting member are provided with first flange plates, and one end of the load-bearing member is provided with a second flange plate. One of the first flange plates is fixedly connected with the tower body, and the other first flange plate is correspondingly and matingly connected with the second flange plate.

[0007] Wherein, the adjusting member further includes a driving member and a transmission member respectively connected with the outer cavity and the inner cavity. The driving member drives the transmission member to move, and the transmission member drives the inner cavity to move axially along the outer cavity.

[0008] Wherein, the connecting member includes a supporting member. The supporting member is coaxially arranged with the load-bearing member and one end is provided with a third flange plate. The other end of the load-bearing member is also provided with a second flange plate, which is correspondingly and matingly connected with the third flange plate.

[0009] Among them, the connecting member further includes two insertion plates perpendicularly connected to each other, one of the insertion plates is vertically arranged on the end surface of the support member away from the load-bearing member, and the side of the other insertion plate abuts against the plate surface of one of the insertion plates and extends to the outer peripheral surface of the support member.

[0010] Among them, both the support member and the load-bearing member are hollow tubes or solid rods, and the outer diameter of the load-bearing member is greater than that of the support member.

[0011] Among them, the connecting member includes two insertion plates arranged at intervals, and the plate surfaces of the two insertion plates are parallel to each other.

[0012] Among them, the load-bearing member is made of fiberglass reinforced plastic, alloy steel or cast aluminum alloy.

[0013] Among them, the adjusting member is a screw jack or a hydraulic jack.

[0014] The beneficial effects of the present application are as follows: The load-bearing device of the present application can be used to connect to the high-voltage end of the tower body and the composite cross arm during operation and maintenance. Then, the length of the load-bearing device is adjusted to relax the cross-arm insulator. Next, the cross-arm insulator to be replaced is removed, and a new cross-arm insulator is installed. Finally, the replacement process of the cross-arm insulator is completed. During the entire operation and maintenance process, it is not necessary to separate or remove the wires originally hung on the high-voltage end of the composite cross arm, that is, it is not necessary to perform temporary suspension treatment on the wires, nor to remove the entire composite cross arm. Only the replacement of a single cross-arm insulator can be carried out by using the load-bearing device, which can simplify the operation and maintenance process to the greatest extent, improve the operation and maintenance efficiency, and save costs. The load-bearing device is easy to install, can greatly reduce the complexity of construction, and can be applied to various types of composite cross arms. In addition, different types of load-bearing devices can be used to replace the post insulators and stay insulators. The structure is simple, easy to operate, and the removal and replacement of insulators of different specifications can be achieved by selecting different models of load-bearing members. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0016] Figure 1 is a schematic flow chart of an embodiment of the transmission tower operation and maintenance method of the present application;

[0017] Figure 2 is a schematic diagram of the original structure of the transmission tower before operation and maintenance;

[0018] Figure 3 is a schematic diagram of the structure of the transmission tower connecting the load-bearing device in an embodiment of the present application;

[0019] Figure 4 is Figure 3 an enlarged schematic view of location A therein;

[0020] Figure 5 is a schematic view of the load-bearing device in an application scenario;

[0021] Figure 6 is a schematic view of the load-bearing device in another application scenario;

[0022] Figure 7 is a schematic structural view of another embodiment of connecting the load-bearing device on a transmission tower according to an embodiment of the present application;

[0023] Figure 8 is a schematic structural view of connecting the load-bearing device on a transmission tower according to another embodiment of the present application;

[0024] Figure 9 is a schematic structural view of another embodiment of connecting the load-bearing device on a transmission tower according to another embodiment of the present application;

[0025] Figure 10 is a schematic structural view of connecting the load-bearing device on a transmission tower according to still another embodiment of the present application. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0027] The "connection" described in the present application, unless otherwise clearly defined or limited, shall be understood in a broad sense, which may be directly connected or indirectly connected through an intermediate medium. In the description of the present application, it should be understood that the orientation or positional relationship indicated by "upper", "lower", "end", "one end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0028] The present application provides a load-bearing device, which is used for replacing cross-arm insulators during the operation and maintenance of transmission towers. The transmission tower includes a tower body and a composite cross-arm arranged on the tower body. The low-voltage end of the composite cross-arm is connected to the tower body, and the high-voltage end of the composite cross-arm is used for hanging conductors. The composite cross-arm includes at least one cross-arm insulator. One end of the cross-arm insulator is connected to the tower body, and the other end of the cross-arm insulator is detachably and fixedly connected to the high-voltage end of the composite cross-arm. The cross-arm insulator may only include a post insulator, or may include a post insulator and a stay insulator. By using the load-bearing device of the present application, each cross-arm insulator detachably and fixedly connected to the high-voltage end of the composite cross-arm can be replaced separately, and it is not necessary to separate the conductors hung on the transmission tower. The operation is simple, safe, with high overall efficiency, simplifies the operation and maintenance process, and also reduces the personal safety risk of operation and maintenance personnel.

[0029] In one embodiment, in combination with Figures 1 to 3 , Figure 1 is a schematic flow chart of the operation and maintenance method of the transmission tower of the present application, Figure 2 and Figure 3 are respectively schematic structural diagrams of the transmission tower 10 before and during operation and maintenance. Since the tower body remains unchanged before and during operation and maintenance, the tower body before and during operation and maintenance is represented by the same reference numeral.

[0030] In this embodiment, the transmission tower 10 includes a tower body 110 and a composite cross-arm arranged on the tower body 110. The low-voltage end of the composite cross-arm is connected to the tower body 110, and the high-voltage end of the composite cross-arm is used for hanging a conductor 101. The composite cross-arm includes a cross-arm insulator 120. One end of the cross-arm insulator 120 is connected to the tower body 110, and the other end of the cross-arm insulator 120 is detachably and fixedly connected to the high-voltage end of the composite cross-arm.

[0031] The operation and maintenance method of the transmission tower 10 includes:

[0032] S11: Hoist the adjustable-length load-bearing device 140 to a preset working position.

[0033] Use a hoisting mechanism to lift the load-bearing device 140 until the load-bearing device 140 reaches a preset working position close to the tower body 110 and convenient for installation.

[0034] The hoisting mechanism may specifically be a crane, or other common hoisting devices may also be used. The crane uses tools such as a moving winch and a wire rope sling to hoist the load-bearing device 140 to a position close to the cross-arm insulator 120 to be replaced on the transmission tower 10, and prepares to install the load-bearing device 140.

[0035] Before hoisting, the appearance of relevant equipment and tools should be checked to ensure that there are no deformations, cracks, damages, etc. The selected equipment and tools must be regularly inspected.

[0036] S12: Install the load-bearing device 140, connect one end of the load-bearing device 140 to the tower body 110, and connect the other end to the high-voltage end of the composite cross arm.

[0037] The tower body 110 is provided with a first construction hole, the high-voltage end of the composite cross arm is provided with a second construction hole, and both ends of the load-bearing device 140 are respectively provided with a first installation hole corresponding to the first construction hole and a second installation hole corresponding to the second construction hole, so as to facilitate the fixed connection of both ends of the load-bearing device 140 to the tower body 110 and the high-voltage end of the composite cross arm respectively, and make the load-bearing device 140 located between the tower body 110 and the high-voltage end of the composite cross arm.

[0038] Preferably, first fixedly connect one end of the load-bearing device 140 to the high-voltage end of the composite cross arm, and then fixedly connect the other end of the load-bearing device 140 to the tower body 110. Since the length of the load-bearing device 140 is adjustable, before installing the load-bearing device 140, the initial length of the load-bearing device 140 can be set arbitrarily. When the second installation hole at one end of the load-bearing device 140 corresponds and matches the second construction hole at the high-voltage end of the composite cross arm, it is fixedly connected through fasteners, and then the length of the load-bearing device 140 is adjusted so that the first installation hole at the other end of the load-bearing device 140 exactly corresponds to the first construction hole of the tower body 110, and then it is fixedly connected through fasteners, and the installation of the load-bearing device 140 can be completed.

[0039] Furthermore, the load-bearing device 140 includes an adjusting member, a load-bearing member and a connecting member connected in sequence. The length of the adjusting member is adjustable, and the first installation hole is arranged on the adjusting member, and the second installation hole is arranged on the connecting member. The load-bearing device 140 is connected to the high-voltage end of the composite cross arm through the connecting member, and the load-bearing device 140 is connected to the tower body 110 through the adjusting member.

[0040] The tower body 110 is a common lattice-type iron tower in the art. Only a partial structure thereof is shown in the drawings and will not be elaborated here.

[0041] S13: Adjust the length of the load-bearing device 140 to relax the cross-arm insulator 120 to be replaced, and remove the cross-arm insulator 120 to be replaced.

[0042] Among them, the length of the load-bearing device 140 is adjustable through the adjusting member. After the load-bearing device 140 is installed, the length of the load-bearing device 140 is adjusted again to relax the cross-arm insulator 120, that is, the load borne by the cross-arm insulator 120 is transferred to the load-bearing device 140, so that the cross-arm insulator 120 can be disassembled and replaced.

[0043] After the cross-arm insulator 120 to be replaced is relaxed, remove the fasteners such as bolts and nuts on the cross-arm insulator 120, and then remove the cross-arm insulator 120 to be replaced.

[0044] S14: Install a new cross-arm insulator 120.

[0045] After removing the original cross-arm insulator 120, keep the position of the load-bearing device 140 unchanged, and continue to install a new cross-arm insulator 120 at the position of the original cross-arm insulator 120 until the structure of the new cross-arm insulator 120 is stable.

[0046] S15: Remove the load-bearing device 140.

[0047] Adjust the length of the load-bearing device 140 to transfer the load on the load-bearing device 140 to the new cross-arm insulator 120 again. After the load-bearing device 140 is not stressed, remove the fasteners connecting both ends of the load-bearing device 140 to disconnect the load-bearing device 140 from the transmission tower 10, and then the replacement of the cross-arm insulator 120 can be completed.

[0048] The above operation and maintenance method can use the load-bearing device 140 to replace the cross-arm insulator 120 with power on or power off. When replacing the cross-arm insulator 120 with power on, the construction personnel wear shielding clothing for equipotential operation, and tools made of insulating materials are required throughout the operation and maintenance process, including the load-bearing device 140 used. When replacing the cross-arm insulator 120 with power off, before step S11, it also includes S01: Perform a power-off operation on the transmission tower 10. That is, before starting the operation and maintenance, ensure that the transmission tower 10 has been powered off to ensure the safety of the operation and maintenance process.

[0049] In an application scenario, combined with Figures 2 - 5 , the transmission tower 10 includes a tower body 110 and a composite cross-arm arranged on the tower body 110. The composite cross-arm includes a cross-arm insulator 120 and a joint fitting 130. The low-voltage end of the composite cross-arm is connected to the tower body 110, and the high-voltage end of the composite cross-arm hangs a conductor 101 through the joint fitting 130. The cross-arm insulator 120 includes a post insulator 1210 and a stay insulator 1220. One end of the post insulator 1210 and one end of the stay insulator 1220 are both detachably connected to the tower body 110, and the stay insulator 1220 is located above the post insulator 1210 on the tower body 110. The other end of the post insulator 1210 and the other end of the stay insulator 1220 are detachably fixed to the joint fitting 130. The joint fitting 130 includes two parallel clamping plates 131. Connecting fittings are provided at the other ends of the post insulator 1210 and the stay insulator 1220. The post insulator 1210 and the stay insulator 1220 are respectively inserted between the two clamping plates 131 through the connecting fittings and fixed by fasteners, so that both the post insulator 1210 and the stay insulator 1220 are connected to the joint fitting 130. A wire-hanging hole is provided at the bottom of the clamping plate 131, and a wire-hanging fitting is arranged in the wire-hanging hole through a fastener for hanging the conductor 101.

[0050] The clamping plate 131 is a plate-shaped member. The clamping plate 131 can be a rectangular plate member, a circular plate member or other special-shaped plate members. The two clamping plates 131 are arranged in parallel, and there is a certain gap between the two clamping plates 131 for clamping the connecting fitting. In this application, the clamping plate 131 is a special-shaped plate member, specifically a polygonal plate member, which is convenient for connecting with other components.

[0051] In an embodiment, first fixing plates 132 are respectively connected to the two outer plate surfaces of the two clamping plates 131 facing away from each other. Second construction holes are provided on the first fixing plates 132 for connecting the load-bearing device 140.

[0052] In another embodiment, referring to Figure 4 , an auxiliary connecting member 134 can also be installed on the first fixing plate 132. The connection between the first fixing plate 132 and the auxiliary connecting member 134 is achieved by providing corresponding through holes on the first fixing plate 132 and the auxiliary connecting member 134 and passing fasteners through the through holes. Second construction holes are provided on the auxiliary connecting member 134, and the load-bearing device 140 is fixedly connected to the auxiliary connecting member 134 through the second construction holes, and then the load-bearing device 140 is fixedly connected to the joint fitting 130. By providing the auxiliary connecting member 134, it is possible to avoid interference between the load-bearing device 140 and the joint fitting 130 or the cross-arm insulator 120 when the load-bearing device 140 is directly installed on the first fixing plate 132 of the joint fitting 130, thereby more conveniently installing the load-bearing device 140.

[0053] In this embodiment, the auxiliary connecting member 134 is a T-shaped plate. The auxiliary connecting member 134 and the first fixing plate 132 are connected by bolts and nuts, so that the auxiliary connecting member 134 can be disassembled and reused; in other embodiments, the load-bearing device can also be directly connected by providing second construction holes on the first fixing plate or other components of the joint fitting, which is not limited herein.

[0054] Continuing to refer to Figure 4 , reinforcing ribs 133 are provided between the outer plate surface of the clamping plate 131 and the two plate surfaces of the first fixing plate 132 facing away from each other, that is, the two reinforcing ribs 133 are respectively provided between the two plate surfaces on both sides of the fixed connection between the clamping plate 131 and the first fixing plate 132. Through the arrangement of the reinforcing ribs 133, the connection strength between the first fixing plate 132 and the clamping plate 131 can be further increased, so that when the load-bearing device 140 is fixed on the joint fitting 130, the phenomenon that the load-bearing device 140 falls off due to the fracture of the first fixing plate 132 will not occur, further eliminating potential safety hazards.

[0055] The clamping plate 131, the first fixing plate 132 and the reinforcing ribs 133 can be connected by welding after being separately formed, or can be directly integrally formed, which is not limited herein.

[0056] The post insulator 1210 and the stay insulator 1220 are both inserted between two clamping plates 131 through connecting fittings, so that the post insulator 1210 and the stay insulator 1220 are respectively connected to the joint fitting 130. Among them, the connecting fitting connected to the post insulator 1210 is the post connecting fitting 1230, that is, the joint fitting 130 is detachably and fixedly connected to the other end of the post insulator 1210 through the post connecting fitting 1230. The post insulator 1210 includes an insulator and end fittings sleeved at both ends of the insulator. The end fitting at the other end of the post insulator 1210 includes a flange cylinder 12111 and a first sealing plate 12112. The flange cylinder 12111 is axially arranged as a hollow structure and is sleeved at one end of the insulator of the post insulator 1210. The first sealing plate 12112 covers the end of the flange cylinder 12111 away from the post insulator 1210. A number of first connection holes are provided on the first sealing plate 12112 for connecting the post connecting fitting 1230. The post connecting fitting 1230 includes a second sealing plate 1231 and a first insertion plate (not shown in the figure). The shape and size of the second sealing plate 1231 are the same as those of the first sealing plate 12112. A number of second connection holes corresponding to the number of first connection holes are provided on the second sealing plate 1231. The first sealing plate 12112 and the second sealing plate 1231 are fixedly connected by passing fasteners through the corresponding first connection holes and second connection holes. The first insertion plate is vertically arranged on the plate surface of the second sealing plate 1231 away from the post insulator 1210. A number of third connection holes are provided on the first insertion plate, and a number of fourth connection holes corresponding to the number of third connection holes are provided on the two clamping plates 131. When the first insertion plate is inserted between the two clamping plates 131, fasteners are passed through the corresponding third connection holes and fourth connection holes to fixedly connect the post connecting fitting 1230 to the joint fitting 130, and then the post insulator 1210 can be fixedly connected to the joint fitting 130.

[0057] The connecting fitting connected to the stay insulator 1220 is the stay connecting fitting 1240, that is, the node fitting 130 is detachably and fixedly connected to the other end of the stay insulator 1220 through the stay connecting fitting 1240. The stay insulator 1220 includes an insulator and end fittings sleeved on both ends of the insulator. The end fitting at the other end of the stay insulator 1220 has two connecting lugs 1221 arranged relatively parallel to each other. The two connecting lugs 1221 are spaced apart to leave a certain gap therebetween. A fifth connection hole is provided on the connecting lug 1221 for connecting the stay connecting fitting 1240. The stay connecting fitting 1240 is a plate-shaped member. A sixth connection hole corresponding to the fifth connection hole is provided at one end of the stay connecting fitting 1240. The stay connecting fitting 1240 is inserted into the gap between the two connecting lugs 1221, and the fixed connection between the end fitting of the stay insulator 1220 and the stay connecting fitting 1240 is realized by passing a fastener through the corresponding fifth connection hole and sixth connection hole. A seventh connection hole is provided at the other end of the stay connecting fitting 1240. Eighth connection holes corresponding to the seventh connection hole are provided on the two clamping plates 131. When the stay connecting fitting 1240 is inserted between the two clamping plates 131, a fastener is passed through the corresponding seventh connection hole and eighth connection hole to fixedly connect the stay connecting fitting 1240 to the node fitting 130, and thus the stay insulator 1220 can be fixedly connected to the node fitting 130.

[0058] In this application, the post insulator 1210 and the stay insulator 1220 are respectively detachably and fixedly connected to the post connecting fitting 1230 and the stay connecting fitting 1240, and then the post connecting fitting 1230 and the stay connecting fitting 1240 are inserted between the two clamping plates 131 of the node fitting 130. Such a setting makes it possible to keep the connection between the post connecting fitting 1230 and the stay connecting fitting 1240 and the node fitting 130 when the post insulator 1210 and the stay insulator 1220 need to be disassembled, and only the fasteners between the post insulator 1210 and the post connecting fitting 1230 and the fasteners between the stay insulator 1220 and the stay connecting fitting 1240 need to be removed. While facilitating the disassembly of the post insulator 1210 and the stay insulator 1220, the overall structure stability of the node fitting 130 can also be maintained. The fasteners used in this application can adopt the common structure of bolt and nut cooperation, or other existing technologies, as long as the fastening connection can be realized. For the convenience of clearly showing the component structure, each fastener is not shown in the figure.

[0059] In one embodiment, in order to replace the post insulator 1210, the load-bearing device 140 in step S11 is set as the first load-bearing device 141. Before step S11, two first load-bearing devices 141 are prepared; step S11 is executed, and the first load-bearing device 141 is lifted by a hoisting mechanism until the first load-bearing device 141 reaches a preset working position close to the tower body 110 and convenient for installation; step S12 is executed, and the two first load-bearing devices 141 are installed between the tower body 110 and the joint fitting 130, and the two first load-bearing devices 141 are symmetrically arranged on both sides of the post insulator 1210 respectively. The two first load-bearing devices 141 are symmetric about the central axis plane of the post insulator 1210. The two first load-bearing devices 141 and the tower body 110 form an isosceles triangle structure, and the post insulator 1210 is located on the midline of the base of the isosceles triangle. At this time, the loads borne by the two first load-bearing devices 141 are equal, so that the forces exerted by the joint fitting 130 in all directions can be balanced, and the stability of the entire connection structure is improved.

[0060] Before step S12, two first construction holes (not shown in the figure) are provided on the tower body 110. The two first construction holes are symmetrically located on both sides of the connection between the post insulator 1210 and the tower body 110. One end of the first load-bearing device 141 is fixedly connected to the tower body 110 through the first construction hole, and the other end is fixedly connected to the joint fitting 130. Of course, one, three or more first construction holes can also be provided on the tower body 110, which specifically correspond to the number of the first load-bearing devices 141 and are convenient for connecting the first load-bearing device 141 to the tower body 110.

[0061] In this embodiment, a second construction hole is provided on the first fixing plate 132 of the joint fitting 130 for connecting the first load-bearing device 141. In other embodiments, the first load-bearing device can also be connected by providing a second construction hole on other components of the joint fitting.

[0062] Combined with Figure 5, the first load-bearing device 141 includes a first adjusting member 1411, a first load-bearing member 1412, and a first connecting member 1413 that are connected in sequence, and the first adjusting member 1411, the first load-bearing member 1412, and the first connecting member 1413 are coaxially arranged. The first adjusting member 1411 includes an outer cavity 14111 and an inner cavity 14112 that are sleeved with each other. Both the outer cavity 14111 and the inner cavity 14112 are columnar structures. The outer cavity 14111 is a hollow columnar structure, and the inner cavity 14112 is located in the hollow inner cavity of the outer cavity 14111, and the outer cavity 14111 and the inner cavity 14112 are coaxially arranged. The relative positions of the outer cavity 14111 and the inner cavity 14112 along their axial directions are adjustable, specifically referring to that the inner cavity 14112 can extend out or retract into the outer cavity 14111, so that the overall length of the first adjusting member 1411 is adjustable. Furthermore, the overall length of the first load-bearing device 141 can be adjusted through the first adjusting member 1411, making the first load-bearing device 141 applicable to replacing post insulators 1210 of various length specifications. The first adjusting member 1411 further includes a first driving member and a first transmission member respectively connected to the outer cavity 14111 and the inner cavity 14112. The first driving member drives the first transmission member to move through hydraulic transmission or screw transmission, and the first transmission member drives the inner cavity 14112 to move along the axial direction of the outer cavity 14111. Among them, it can be that the outer cavity 14111 is arranged close to the first load-bearing member 1412 and the inner cavity 14112 is arranged away from the first load-bearing member 1412, or the inner cavity 14112 is arranged close to the first load-bearing member 1412 and the outer cavity 14111 is arranged away from the first load-bearing member 1412, and no limitation is made here.

[0063] Both ends of the first adjusting member 1411 are provided with first flange plates 14113. Among them, the first flange plate 14113 of the first adjusting member 1411 far from the first load-bearing member 1412 is used for fixedly connecting with the tower body 110. A number of first mounting holes are provided on the first flange plate 14113 far from the first load-bearing member 1412, and the number of first mounting holes corresponds to a number of first construction holes provided on the tower body 110. Fasteners are sequentially passed through the corresponding first mounting holes and first construction holes, and then the first load-bearing device 141 is fixedly connected with the tower body 110. The first flange plate 14113 of the first adjusting member 1411 close to the first load-bearing member 1412 is used for connecting with the first load-bearing member 1412. In step S13, the first adjusting member 1411 adjusts its own length by extending its inner cavity 14112 out of the outer cavity 14111, so as to adjust the length of the first load-bearing device 141, and further realize the overall tensioning of the connection structure between the first load-bearing device 141 and the joint fitting 130, so that the load borne by the post insulator 1210 is transferred to the first load-bearing device 141, and then the post insulator 1210 can be relaxed, which is convenient for disassembling and replacing the post insulator 1210. In a specific embodiment, the first adjusting member 1411 can adopt a screw jack, which is convenient to use and easy to operate; in other embodiments, the first adjusting member can also be other tooling equipment, such as a hydraulic jack, as long as the length can be adjusted, and no limitation is made here.

[0064] The first load-bearing member 1412 is a pipe structure. At one end of the first load-bearing member 1412 away from the joint fitting 130, a second flange 14121 is provided for fixedly connecting with the first flange 14113 provided at the end of the first adjusting member 1411 close to the first load-bearing member 1412. By providing the first load-bearing member 1412 and the first adjusting member 1411 to be detachably connected, the first load-bearing member 1412 with different lengths can be replaced according to the actual required length during operation, so as to adapt to the post insulators 1210 with different length specifications, enhancing the applicability of the first load-bearing device 141. A number of flange through-holes are correspondingly provided on the first flange 14113 of the first adjusting member 1411 close to the first load-bearing member 1412 and on the second flange 14121. Before step S11, fasteners are sequentially passed through the corresponding flange through-holes to fixedly connect the first load-bearing member 1412 and the first adjusting member 1411. Since in step S13, the first load-bearing member 1412 needs to bear the load transferred from the post insulator 1210, the first load-bearing member 1412 needs to be made of a material with sufficient hardness, and alloy steel can be used. In other embodiments, the first load-bearing member can also be made of metal materials of other materials, such as cast aluminum alloy, etc.; the first load-bearing member can also be made of fiberglass material. Fiberglass has a large elastic modulus, good mechanical properties, and is not easily brittle after being stressed. It can not only ensure the safety and reliability of the support, but also facilitate the construction personnel to construct under the live state. In short, the material of the first load-bearing member only needs to have sufficient hardness to bear the corresponding load, and no limitation is made here.

[0065] In this embodiment, the first load-bearing member 1412 is a hollow pipe, and the cross-section of the first load-bearing member 1412 is circular, which is convenient for processing and connection. In other embodiments, according to different working conditions, the first load-bearing member can also be a solid rod, and the cross-section can be other shapes such as a rectangle, as long as it is convenient for connection and meets the connection strength, and no limitation is made here.

[0066] Continue to combine Figure 4 and Figure 5 , the first connecting member 1413 includes two second insertion plates 14131 arranged at intervals. The two second insertion plates 14131 are arranged at the end of the first load-bearing member 1412 away from the first adjusting member 1411, and the plate surfaces of the two second insertion plates 14131 are parallel to each other. Second mounting holes are provided on the second insertion plates 14131, and the two second insertion plates 14131 are clamped on both side plate surfaces of the first fixing plate 132. In step S12, by passing fasteners through the second mounting holes and the second construction holes, the mutual connection between the first load-bearing device 141 and the joint fitting 130 is realized. The connection between the first connecting member 1413 and the first load-bearing member 1412 can be fixed by welding or can also be integrally formed.

[0067] In other embodiments, the first connecting member may also be composed of other numbers of second insertion plates, which may be one, three, four or more. The second insertion plates may be arranged at intervals along the circumference of the first load-bearing member and connected to the first load-bearing member for fixedly connecting to the joint fitting. The specific number of the second insertion plates may be determined according to the actual shape of the joint fitting.

[0068] Combined with Figure 6 , in another embodiment, the first connecting member 1413 is separately arranged from the first load-bearing member 1412 and fixedly connected by fasteners. The first connecting member 1413 includes a second insertion plate 14131, a first support member 14132, and a third flange 14133 connected in sequence. The first support member 14132 is coaxially arranged with the first load-bearing member 1412. Second flanges 14121 are arranged at both ends of the first load-bearing member 1412. The end of the first load-bearing member 1412 far from the joint fitting 130 is fixedly connected to the first flange 14113 provided at the end of the first adjusting member 1411 close to the first load-bearing member 1412 through the second flange 14121. The end of the first load-bearing member 1412 close to the joint fitting 130 is fixedly connected to the third flange 14133 on the first connecting member 1413 through the second flange 14121. In this way, both the connection between the first connecting member 1413 and the first load-bearing member 1412 and the connection between the first load-bearing member 1412 and the first adjusting member 1411 are detachable connections. Different lengths of the first load-bearing member 1412 can be replaced according to the actual length required during operation, so as to adapt to the post insulators 1210 of different length specifications, enhancing the applicability of the first load-bearing device 141. At the same time, only different lengths of the first load-bearing member 1412 need to be prepared in advance for replacement, without replacing the first connecting member 1413 and the first adjusting member 1411, and the cost of spare parts is lower.

[0069] A number of flange through holes are correspondingly arranged on the second flange 14121 of the first load-bearing member 1412 close to the joint fitting 130 and on the third flange 14133. Before step S11, the fasteners are sequentially passed through the corresponding flange through holes to fixedly connect the first load-bearing member 1412 and the first connecting member 1413, and to fixedly connect the first load-bearing member 1412 and the first adjusting member 1411. The outer diameter of the first load-bearing member 1412 is larger than the outer diameter of the first support member 14132. In this way, when the first connecting member 1413 is fixedly connected to the joint fitting 130, due to the smaller outer diameter of the first support member 14132, interference with the joint fitting 130 can be effectively avoided, so that it can be applicable to connecting joint fittings 130 of different shapes.

[0070] In an application scenario, the first connecting member 1413 includes two second insertion plates 14131 that are perpendicularly connected to each other. One of the second insertion plates 14131 is vertically disposed on the end face of the first support member 14132 close to the joint fitting 130 and is used for fixedly connecting to the first fixing plate 132 on the joint fitting 130. Then, a second mounting hole is provided on this second insertion plate 14131. In step S12, the first load-bearing device 141 and the joint fitting 130 are connected to each other by passing a fastener through the second mounting hole and a corresponding second construction hole on the first fixing plate 132. The other second insertion plate 14131 is perpendicular to both the plate surface of the above-mentioned second insertion plate 14131 and the end face of the first support member 14132 close to the joint fitting 130. Moreover, the side edge of this other second insertion plate 14131 abuts against the plate surface of the above-mentioned second insertion plate 14131 and extends to the outer peripheral surface of the first support member 14132, which can enhance the mechanical strength of the first connecting member 1413, and further improve the connection strength between the first connecting member 1413 and the joint fitting 130.

[0071] Of course, in other application scenarios, the first connecting member 1413 can also adopt other structures, as long as it can achieve the connection between the first load-bearing device 141 and the joint fitting 130 and ensure the connection strength, which is not limited herein.

[0072] Before step S11, first determine the length of the post insulator 1210 to be replaced, and determine the length of the first load-bearing device 141 required according to the length of the post insulator 1210 to be replaced. Select the length of the corresponding first load-bearing member 1412 according to this length, and select the first connecting member 1413 that matches the joint fitting 130. On the ground, first connect the first load-bearing member 1412 with the first adjusting member 1411 and the first connecting member 1413, that is, connect one end of the first adjusting member 1411 to one end of the first load-bearing member 1412, and connect the other end of the first load-bearing member 1412 to one end of the first connecting member 1413, thereby completing the assembly of the first load-bearing device 141. In step S12, install the other end of the first adjusting member 1411 on the tower body 110, and connect the other end of the first connecting member 1413 to the high-voltage end of the composite cross arm, specifically, connect it to the joint fitting 130, thereby completing the installation of the first load-bearing device 141. It can be understood that post insulators with different length specifications can also be applicable to the same specification of the first load-bearing device, as long as the position of the first construction hole on the tower body is adjusted, that is, as long as the distance between the first construction hole on the tower body and the second construction hole on the joint fitting matches the length of the first load-bearing device. In this way, the applicability of the first load-bearing device can be expanded.

[0073] Since the length of the first load-bearing device 141 is adjustable, the initial length of the first load-bearing device 141 can be set according to the actual working conditions. As long as the first load-bearing device 141 can fit the post insulator 1210, the two ends of the first load-bearing device 141 can be conveniently installed on the tower body 110 and the joint fitting 130. After the installation of the first load-bearing device 141 is completed, the length of the first load-bearing device 141 is adjusted again so that the length of the first load-bearing device 141 is slightly greater than the length between the first construction hole and the second construction hole, that is, the two ends of the first load-bearing device 141 can support the tower body 110 and the joint fitting 130, thereby increasing the distance between the tower body 110 and the joint fitting 130, the post insulator 1210 is relaxed accordingly, and the load on the post insulator 1210 is transferred to the first load-bearing device 141, so that the post insulator 1210 can be disassembled and replaced.

[0074] In another embodiment, referring to Figure 7 , in order to replace the stay insulator 1220, the load-bearing device 140 in step S11 is set as the second load-bearing device 142. Before step S11, prepare two second load-bearing devices 142; execute step S11, use the hoisting mechanism to lift the second load-bearing device 142 until the second load-bearing device 142 reaches a preset working position close to the tower body 110 and convenient for installation; execute step S12, install the two second load-bearing devices 142 between the tower body 110 and the joint fitting 130, and the two second load-bearing devices 142 are respectively symmetrically arranged on both sides of the stay insulator 1220, the two second load-bearing devices 142 are symmetric about the central axis plane of the stay insulator 1220, the two second load-bearing devices 142 and the tower body 110 form an isosceles triangle structure, and the stay insulator 1220 is located on the midline of the base of the isosceles triangle. At this time, the loads on the two second load-bearing devices 142 are equal, so that the forces on the joint fitting 130 in all directions can be balanced, and the stability of the entire connection structure is improved.

[0075] Before step S12, two first construction holes (not shown in the figure) are provided on the tower body 110. The two first construction holes are symmetrically located on both sides of the connection between the stay insulator 1220 and the tower body 110. One end of the second load-bearing device 142 is fixedly connected to the tower body 110 through the first construction hole, and the other end is fixedly connected to the joint fitting 130. Of course, one, three or more first construction holes can also be provided on the tower body 110, which specifically correspond to the number of the second load-bearing devices 142 and are convenient for connecting the second load-bearing devices 142 to the tower body 110.

[0076] In this embodiment, a second construction hole is provided on the auxiliary connecting member 134 of the joint fitting 130 for connecting the second load-bearing device 142. In other embodiments, the second load-bearing device can also be connected by providing second construction holes on other components of the joint fitting.

[0077] The second load-bearing device 142 includes a second adjusting member 1421 connected to each other 、 a second load-bearing member 1422 and a second connecting member 1423, and the second adjusting member 1421, the second load-bearing member 1422 and the second connecting member 1423 are coaxially arranged. The second adjusting member 1421 includes a guy wire member, a second driving member, and a second transmission member. The guy wire member is connected to the second transmission member and the second load-bearing member 1422. The second driving member drives the second transmission member to move, and the two cooperate with each other to shorten or elongate the guy wire member, so that the overall length of the second adjusting member 1421 can be adjusted according to requirements. Furthermore, the overall length of the second load-bearing device 142 can be adjusted through the second adjusting member 1421, so that the second load-bearing device 142 is applicable to replacing stay insulators 1220 with various length specifications.

[0078] The second adjusting member 1421 is connected to the second load-bearing member 1422 through a guy wire member. In step S13, by tensioning the guy wire member, the length of the second adjusting member 1421 is shortened, that is, the length of the second load-bearing device 142 is shortened, so that the connection structure between the second load-bearing device 142 and the joint fitting 130 is tightened as a whole, so that the load on the stay insulator 1220 is transferred to the second load-bearing device 142, and then the stay insulator 1220 can be relaxed, which is convenient for disassembling and replacing the stay insulator 1220. In a specific embodiment, the second adjusting member 1421 can adopt a hand winch, which is convenient to use and easy to operate. In other embodiments, the second adjusting member can also be other tooling equipment, such as an electric hoist or a winch, as long as the length can be adjusted, and no limitation is made here.

[0079] The second load-bearing member 1422 includes a first connecting rope. The length of the first connecting rope corresponds to the length of the stay insulator 1220 and is connected to the second adjusting member 1421. One end of the first connecting rope is connected to the joint fitting 130, and the other end is connected to one end of the second adjusting member 1421 through a guy wire member. The other end of the second adjusting member 1421 is directly connected to the tower body 110. In other embodiments, the second adjusting member may further include a second connecting rope. One end of the first connecting rope is connected to the joint fitting, and the other end is connected to one end of the second adjusting member through a guy wire member. The other end of the second adjusting member is connected to the tower body through the second connecting rope. By providing the first connecting rope and the second connecting rope, first connecting ropes and second connecting ropes of different lengths can be replaced according to the actual required length during operation, so as to adapt to stay insulators 1220 of different length specifications, enhancing the applicability of the second load-bearing device 142. The lengths of the first connecting rope and the second connecting rope only need to correspond to the length of the stay insulator 1220 and facilitate connecting the joint fitting 130 and the tower body 110, and are not limited herein. Before step S11, the second load-bearing member 1422 is fixedly connected to the second adjusting member 1421 through a guy wire member. Since in step S13, the second load-bearing member 1422 needs to bear the load transferred from the stay insulator 1220, the second load-bearing member 1422 needs to ensure a certain connection strength and can be made of steel wire rope. In other embodiments, the second load-bearing member may also be made of an insulating rope to facilitate construction by construction personnel in a live state. Of course, the second load-bearing member may also be made of other materials, as long as the connection strength is satisfied, and is not limited herein.

[0080] Combined with Figure 4 and Figure 7 , a second mounting hole is provided on the second connecting member 1423. In step S12, the second load-bearing device 142 is connected to the joint fitting 130 by passing a fastener through the second mounting hole and the corresponding second construction hole on the auxiliary connecting member 134. In this embodiment, the second connecting member 1423 is a U-shaped hanging ring. In other embodiments, the second connecting member may also be other connecting fittings such as a right-angle hanging plate, as long as the connection between the second load-bearing device and the joint fitting can be achieved and the connection strength is ensured, and is not limited herein.

[0081] Before step S11, first determine the length of the stay insulator 1220 to be replaced, and determine the length of the second load-bearing device 142 required according to the length of the stay insulator 1220 to be replaced. Select the length of the corresponding second load-bearing member 1422 according to this length. On the ground, first connect the second load-bearing member 1422 with the second adjusting member 1421 and the second connecting member 1423, that is, connect one end of the second adjusting member 1421 to one end of the second load-bearing member 1422, and connect the other end of the second load-bearing member 1422 to one end of the second connecting member 1423, so as to complete the assembly of the second load-bearing device 142. In step S12, install the other end of the second adjusting member 1421 on the tower body 110, and connect the other end of the second connecting member 1423 to the joint fitting 130, so as to complete the installation of the second load-bearing device 142. It can be understood that stay insulators of different length specifications can also be applicable to the same specification of the second load-bearing device, as long as the position of the first construction hole on the tower body is adjusted, that is, as long as the distance between the first construction hole on the tower body and the second construction hole on the joint fitting matches the length of the second load-bearing device. In this way, the applicability of the second load-bearing device can be expanded.

[0082] Since the length of the second load-bearing device 142 is adjustable, the initial length of the second load-bearing device 142 can be set according to the actual working conditions. As long as the second load-bearing device 142 can be adapted to the stay insulator 1220, the two ends of the second load-bearing device 142 can be conveniently installed on the tower body 110 and the joint fitting 130. After the second load-bearing device 142 is installed, adjust the length of the second load-bearing device 142 again to make the length of the second load-bearing device 142 slightly less than the length between the first construction hole and the second construction hole, that is, the two ends of the second load-bearing device 142 can tighten the tower body 110 and the joint fitting 130, and then the distance between the tower body 110 and the joint fitting 130 is reduced, the stay insulator 1220 is relaxed accordingly, and the load on the stay insulator 1220 is transferred to the second load-bearing device 142, so that the stay insulator 1220 can be disassembled and replaced.

[0083] In another application scenario, combined with Figure 8, the transmission tower 20 includes a tower body 210 and a composite cross arm disposed on the tower body 210. The composite cross arm includes a cross arm insulator 220 and a joint fitting 230. The low-voltage end of the composite cross arm is connected to the tower body 210, and the high-voltage end of the composite cross arm hangs the conductor 201 through the joint fitting 230. The cross arm insulator 220 includes two post insulators 2210 and two stay insulators 2220. One end of each of the two post insulators 2210 and one end of each of the two stay insulators 2220 are detachably connected to the tower body 210, and the stay insulators 2220 are located above the post insulators 2210 on the tower body 210. The other ends of the two post insulators 2210 and the other ends of the two stay insulators 2220 are detachably fixedly connected to the joint fitting 230. The two post insulators 2210 form a V-shaped structure with the joint fitting 230 as the apex angle, and the two stay insulators 2220 form a V-shaped structure with the joint fitting 230 as the apex angle.

[0084] In one embodiment, in order to replace the post insulator 2210, the load-bearing device 140 in step S11 is set as the first load-bearing device 141. Before step S11, prepare a first load-bearing device 141; execute step S11, use the hoisting mechanism to lift the first load-bearing device 141 until the first load-bearing device 141 reaches a preset working position close to the tower body 210 and convenient for installation; execute step S12, install the first load-bearing device 141 between the tower body 210 and the joint fitting 230, and the first load-bearing device 141 is located in the middle of the two post insulators 2210, so that the two post insulators 2210 are symmetric about the central axis plane of the first load-bearing device 141. The two post insulators 2210 and the tower body 210 form an isosceles triangle structure, and the first load-bearing device 141 is located on the median line of the base of the isosceles triangle, so that the force on the joint fitting 230 in each direction can be balanced, and the stability of the entire connection structure is improved.

[0085] Before step S12, a first construction hole (not shown in the figure) is provided on the tower body 210. A first construction hole is located at the middle position of the connection between the two post insulators 2210 and the tower body 210. One end of the first load-bearing device 141 is fixedly connected to the tower body 210 through the first construction hole, and the other end is fixedly connected to a second construction hole on the joint fitting 230. Of course, two, three or more first construction holes can also be provided on the tower body 210, which specifically correspond to the number of the first load-bearing devices 141 and are convenient for connecting the first load-bearing device 141 and the tower body 210.

[0086] The structure of the first load-bearing device 141 and the process of disassembling and replacing the post insulator 2210 by using the first load-bearing device 141 are as described above, and will not be elaborated here.

[0087] In another embodiment, refer to Figure 9, in order to replace the stay insulator 2220, the load-bearing device 140 in step S11 is set as the second load-bearing device 142. Before step S11, prepare a second load-bearing device 142; execute step S11, use the lifting mechanism to lift the second load-bearing device 142 until the second load-bearing device 142 reaches a preset working position close to the tower body 210 and convenient for installation; install the second load-bearing device 142 between the tower body 210 and the joint fitting 230, and the second load-bearing device 142 is located in the middle of the two stay insulators 2220, so that the two stay insulators 2220 are symmetric about the central axis plane of the second load-bearing device 142. The two stay insulators 2220 and the tower body 210 form an isosceles triangle structure, and the second load-bearing device 142 is located on the median line of the base of the isosceles triangle, so that the force on the joint fitting 230 in each direction can be balanced, and the stability of the entire connection structure is improved.

[0088] Before step S12, set a first construction hole (not shown in the figure) on the tower body 210. A first construction hole is located at the middle position of the connection between the two stay insulators 2220 and the tower body 210. One end of the second load-bearing device 142 is fixedly connected to the tower body 210 through the first construction hole, and the other end is fixedly connected to the second construction hole on the joint fitting 230. Of course, two, three or more first construction holes can also be set on the tower body 210, specifically corresponding to the number of the second load-bearing devices 142 and convenient for connecting the second load-bearing device 142 to the tower body 210.

[0089] The structure of the second load-bearing device 142 and the process of disassembling and replacing the stay insulator 2220 by using the second load-bearing device 142 are as described above, and will not be elaborated here. In other embodiments, the number of the second load-bearing devices can also be two, three or more. The specific number is determined in combination with the shape of the joint fitting and the size specifications of the stay insulators, which should not only meet the convenience of connecting with the joint fitting, but also meet the connection strength.

[0090] In another application scenario, in combination with Figure 10 , the transmission tower 30 includes a tower body 310 and a composite cross arm arranged on the tower body 310. The composite cross arm includes a cross-arm insulator 320 and a joint fitting 330. The low-voltage end of the composite cross arm is connected to the tower body 310, and the high-voltage end of the composite cross arm hangs a conductor through the joint fitting 330. The structure of the cross-arm insulator 320 is the same as the structure of the aforementioned cross-arm insulator 220, and both include two post insulators 3210 and two stay insulators 3220, which will not be elaborated here.

[0091] In one embodiment, in order to replace the post insulator 3210, the bearing device 140 in step S11 is set to two first bearing devices 141. Before step S11, prepare two first bearing devices 141; perform step S11, use the lifting mechanism to lift the first bearing device 141 until the first bearing device 141 reaches a preset working position close to the tower body 310 and convenient for installation; perform step S12, install the two first bearing devices 141 between the tower body 310 and the joint fitting 330, and the two first bearing devices 141 are at different heights on the central axis plane of the two post insulators 3210, so that the force on the joint fitting 330 in each direction can be balanced, and the stability of the entire connection structure is improved.

[0092] In other embodiments, the number of the first bearing devices may also be one, three or more. The specific number is determined in combination with the shape of the joint fitting and the size specification of the post insulator, which should not only facilitate the connection with the joint fitting but also meet the connection strength.

[0093] Before step S12, set two first construction holes (not shown in the figure) on the tower body 310. The two first construction holes are arranged at intervals in the vertical direction, that is, the centers of the two first construction holes are on the same vertical direction, and the two first construction holes are located at the middle position of the connection between the two post insulators 3210 and the tower body 310. One end of each of the two first bearing devices 141 is fixedly connected to the tower body 310 through the two first construction holes, and the other end is fixedly connected to the joint fitting 330. Of course, one, three or more first construction holes may also be provided on the tower body 310, which specifically corresponds to the number of the first bearing devices 141 and is convenient for connecting the first bearing device 141 to the tower body 310.

[0094] The structure of the first bearing device 141 and the process of disassembling and replacing the post insulator 3210 by using the first bearing device 141 are as described above and will not be elaborated here.

[0095] In another application scenario, the composite crossarm only includes crossarm insulators and does not provide independent joint fittings. That is, the high-voltage end of the composite crossarm directly suspends the conductor without passing through joint fittings. The crossarm insulator includes a post insulator and a stay insulator. One end of the post insulator and one end of the stay insulator are both detachably connected to the tower body. The other end of the post insulator and the other end of the stay insulator are connected to each other. That is, the stay insulator is detachably and fixedly connected to the end fitting at the other end of the post insulator. The composite crossarm directly suspends the conductor through the end fitting of the post insulator. At this time, according to the operation and maintenance method of the present application, only the stay insulator can be replaced, and the post insulator cannot be replaced. And the aforementioned second load-bearing device 142 is used to replace the stay insulator, and the details are not described herein again. Further, in the operation and maintenance scenario of the crossarm insulator without joint fittings, the crossarm insulator may include a plurality of post insulators and a plurality of stay insulators, wherein the stay insulator is detachably and fixedly connected to the end fitting at the other end of the post insulator, and the composite crossarm directly suspends the conductor through the end fitting of the post insulator. Then, according to the operation and maintenance method of the present application, only the stay insulator can be replaced.

[0096] In this embodiment, the first load-bearing device 141 is used to replace the post insulator 1210, and the second load-bearing device 142 is used to replace the stay insulator 1220. In other embodiments, the first load-bearing device may also be used to replace the stay insulator, and the second load-bearing device may be used to replace the post insulator, as long as the replacement of the crossarm insulator can be achieved, and no limitation is made herein.

[0097] The load-bearing device in the present application does not limit the specific structure of the high-voltage end of the composite crossarm during operation and maintenance. As long as the load-bearing device can be connected to the high-voltage end of the composite crossarm, the replacement of the crossarm insulator can be carried out. Further, when the composite crossarm includes joint fittings, the structure of the joint fittings can be adjusted according to the number and arrangement form of the crossarm insulators, as long as the load-bearing device can be connected to the joint fittings.

[0098] Advantages of the present application: The present application uses a load-bearing device to remove and replace a single crossarm insulator, without separating or removing the conductor originally suspended on the crossarm insulator. That is, there is no need to perform temporary suspension treatment on the conductor, nor to remove the entire composite crossarm, which can simplify the operation and maintenance steps to the greatest extent, improve the operation and maintenance efficiency, and save costs.

[0099] At the same time, the present application uses the joint fittings provided at the high-voltage end of the composite crossarm to connect the load-bearing device. The load-bearing device is convenient to install, can greatly reduce the complexity of construction, and can be applied to various different types of composite crossarms.

[0100] In addition, in this application, different types of load-bearing devices are used to replace post insulators and stay insulators. Both of the two load-bearing devices used have simple structures, are convenient to operate, and different specifications of insulators can be removed and replaced by selecting different models of load-bearing members.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A load-bearing device for replacing a cross-arm insulator installed on a transmission tower, characterized in that, The load-bearing device includes an adjusting member, a load-bearing member, and a connecting member that are connected in sequence. One end of the adjusting member is used for fixedly connecting to the tower body of the transmission tower, and the other end is fixedly connected to one end of the load-bearing member. The other end of the load-bearing member is fixedly connected to the connecting member. The adjusting member is used to adjust the length of the load-bearing device.

2. The load-bearing device according to claim 1, characterized in that, The adjusting member includes an outer cavity and an inner cavity that are coaxially arranged. Both the outer cavity and the inner cavity are columnar structures. The outer cavity is a hollow columnar structure, and the inner cavity is located in the hollow inner cavity of the outer cavity. The relative positions of the outer cavity and the inner cavity along their axial directions are adjustable.

3. The load-bearing device according to claim 1, characterized in that, First flange plates are provided at both ends of the adjusting member, and a second flange plate is provided at one end of the load-bearing member. One of the first flange plates is fixedly connected to the tower body, and the other first flange plate is correspondingly and matingly connected to the second flange plate.

4. The load-bearing device according to claim 2, characterized in that, The adjusting member further includes a driving member and a transmission member that are respectively connected to the outer cavity and the inner cavity. The driving member drives the transmission member to move, and the transmission member drives the inner cavity to move axially along the outer cavity.

5. The load-bearing device according to claim 3, characterized in that, The connecting member includes a support member. The support member is coaxially arranged with the load-bearing member and has a third flange plate at one end. The other end of the load-bearing member also has the second flange plate, which is correspondingly and matingly connected to the third flange plate.

6. The load-bearing device according to claim 5, characterized in that, The connecting member further includes two plug plates that are perpendicularly connected to each other. One of the plug plates is vertically arranged on the end face of the support member away from the load-bearing member, and the side of the other plug plate abuts against the plate surface of the one plug plate and extends to the outer peripheral surface of the support member.

7. The load-bearing device according to claim 5, characterized in that, Both the support member and the load-bearing member are hollow tubes or solid rods, and the outer diameter of the load-bearing member is greater than the outer diameter of the support member.

8. The load-bearing device according to claim 1, characterized in that The connecting member includes two spaced-apart plug plates, and the plate surfaces of the two plug plates are parallel to each other.

9. The load-bearing device according to claim 1, characterized in that, The load-bearing member is made of fiberglass, alloy steel, or cast aluminum alloy.

10. The load-bearing device according to claim 1, characterized in that, The adjusting member is a screw jack or a hydraulic jack.

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