Temporary cross arm device for overhead line without crossing frame

Abstract

The application discloses an overhead line non-crossing temporary cross arm device and relates to the technical field of power high-altitude operation.The application comprises a cross arm body, a pole tower connecting assembly, a cable support guiding assembly and a safety protection assembly.The cross arm body adopts a sleeve telescopic rigid frame;the inner side of the end hoop type connecting piece is provided with anti-skid rubber;one set of hoop is compatible with a cement pole and an iron tower and is directly locked on the original pole tower to realize free crossing and free ground anchor fixing;insulators and pay-off trolleys are arranged on the cross arm in an interval and are used for guiding wire spreading; and a side integrated guardrail and an anti-skid walkway are arranged.The device saves the traditional crossing erection and removal process, shortens the construction period from 10 days to 4 days, is convenient to disassemble and assemble, is reusable, greatly reduces the safety accident rate, is suitable for crossing roads, railways, live lines and complex mountainous construction and solves the technical problems of large material consumption, wide occupation, poor safety and terrain limitation of the existing crossing.

Description

Technical Field

[0001] This invention belongs to the field of power high-altitude operation technology, and specifically relates to a temporary crossarm device for overhead lines without crossing frames. Background Technology

[0002] In the construction, reconstruction, or maintenance of overhead transmission lines, conductor laying often requires crossing existing operating lines, highways, railways, rivers, and other obstacles. Traditional construction methods commonly employ bamboo, steel pipe, or lattice-type crossing frames to achieve cross-line protection and conductor support. However, existing crossing frame construction methods have six inherent drawbacks: (1) Large material consumption: Construction requires a large number of main materials such as scaffolding poles, scaffolding boards, and reinforcing cables, resulting in high material procurement and transportation costs; (2) Long construction period: The entire process of erecting and dismantling the scaffolding is complicated and time-consuming, which restricts the overall construction progress; (3) Large land area: Construction in mountainous and canyon areas requires a large area of ​​ground work site, which makes land acquisition and coordination difficult; (4) High safety risk: The construction and dismantling of the scaffolding is prone to accidents such as falling from height and being struck by objects. The overturning of the scaffolding will threaten the safety of passing vehicles and operating lines below. The accident rate is about 0.5‰. (5) High overall cost: The costs of materials, labor, machinery, and site rental are combined, resulting in high construction costs for cross-line projects; (6) Environmental and topographical limitations: Large crossing frames cannot be erected in high mountains and valleys, main roads in urban areas, and sections with dense power lines, and construction plans have to be changed in some scenarios.

[0003] Currently, most temporary crossarm products on the market without gantry cranes require ground anchor cable reinforcement, have fixed-length, non-extendable crossarms, lack integrated personnel safety protection structures, and their clamps can only be used on a single pole or tower (either a concrete pole or a steel tower), resulting in poor versatility. Therefore, there is an urgent need to develop a temporary crossarm device that requires no ground anchor, is compatible with multiple poles and towers, and integrates cable laying guidance and safety protection. Summary of the Invention

[0004] In response to the problems in related technologies, this invention proposes a temporary crossarm device for overhead lines without crossing frames, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a temporary crossarm device for overhead power lines without crossing frames, comprising a crossarm body, a tower connection assembly, a cable support and guide assembly, and a safety protection assembly; The main body of the crossarm is a rigid frame structure, and adopts an inner and outer tube telescopic locking structure. The pole and tower connection assembly is located at the end of the crossarm body and includes a pair of semi-circular clamps, adjusting bolts, and connecting ear plates. The inner side of the clamps is provided with anti-slip rubber pads, and the clamps can be detachably fixed to the crossarm body and the pole and tower via the connecting ear plates. The cable support and guide assembly is fixed at intervals on the crossarm body and consists of insulator strings and cable-laying pulleys. The safety protection components are installed on the sides and top of the crossarm body and include guardrail posts and anti-slip walkway treads.

[0006] Furthermore, the main body of the crossarm is formed by bolting together two parallel angle steel main beams and multiple transverse connecting rods, with a standard length of 3m per section. The overall length is fixed by sliding expansion and contraction of inner and outer sleeves and by locking bolts.

[0007] Furthermore, the clamp of the pole-tower connection assembly is adapted to round cement poles and angle steel towers. Under tower installation conditions, the clamp can be replaced with a bracket structure that is clamped onto the main angle steel member of the tower.

[0008] Furthermore, the upper end of the insulator string is suspended from the crossarm body, and the lower end is hinged to a wire-laying pulley, which is used to support and guide the construction conductor or traction rope.

[0009] Furthermore, the railing posts of the safety protection component are used to lay safety ropes and safety nets, the walkway treads are laid on the upper surface of the crossbeam to form a personnel working passage, and safety warning signs are set at both ends of the crossbeam.

[0010] Furthermore, the entire device features an all-metal bolted connection structure, and all components are detachable and can be repeatedly disassembled and reused.

[0011] Compared with the prior art, the present invention has the following advantages: (1) Completely eliminates the need for erecting crossing frames and ground anchors: the crossarm can be fixed by relying on clamps to lock it to the original tower, eliminating the process of erecting and dismantling crossing frames and ground anchoring. The traditional 10-day crossing construction period is reduced to 4 days, greatly saving the input of main materials and labor. (2) Easy to assemble and disassemble and high reusability: all components are bolted and detachable, the metal structure is sturdy, and a single set of equipment can be used in multiple engineering projects, reducing project amortization costs; (3) High versatility: The adjustable clamp is compatible with cement round poles and angle steel towers, and the telescopic crossarm can be freely adjusted in length to adapt to different span widths. It is suitable for various cross-line working conditions such as highways, railways, power lines, and mountains. (4) Significantly improved safety performance: The integrated walkway and guardrails make the working platform of construction personnel stable, eliminating the risk of scaffold overturning and reducing the construction safety accident rate from 0.5‰ to 0.1‰; the wire laying pulley and insulation string isolate the live parts, improving the safety distance of cross-line laying insulation, and optimizing the safety distance measurement error from ±0.3m to ±0.1m; (5) Wide site adaptability: It has no ground occupation requirement and can be used in restricted scenarios such as urban areas, canyons, and dense power lines where it is impossible to set up a scaffold.

[0012] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the temporary crossarm without a crossing frame in the embodiments of this application.

[0015] The attached diagram lists the components represented by each number as follows: 1. The main body of the cross arm. Detailed Implementation

[0016] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0017] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0018] Please see Figure 1 As shown, the present invention is a temporary crossarm device for overhead lines without crossing frames, including a crossarm body 1, a tower connection assembly, a cable support and guide assembly, and a safety protection assembly; The main body 1 of the crossarm is a rigid frame structure and adopts an inner and outer tube telescopic locking structure. The pole and tower connection assembly is located at the end of the crossarm body 1 and includes a pair of semi-circular clamps, adjusting bolts, and connecting ear plates. The inner side of the clamps is provided with anti-slip rubber pads. The clamps can be detachably fixed to the crossarm body 1 and the pole and tower via the connecting ear plates. The cable support and guide assembly is fixed at intervals on the crossarm body 1 and consists of insulator strings and cable laying pulleys; The safety protection components are installed on the sides and top of the crossarm body and include guardrail posts and anti-slip walkway treads.

[0019] In one embodiment, the crossarm body 1 is formed by bolting together two parallel angle steel main beams and multiple transverse connecting rods. The standard length of a single section is 3m, and the overall length is fixed by sliding expansion and contraction of inner and outer sleeves and by locking bolts.

[0020] In one embodiment, for the above-mentioned pole and tower connection assembly, the clamp of the pole and tower connection assembly is adapted to round cement poles and angle steel towers. Under the condition of tower installation, the clamp can be replaced by a bracket structure that is clamped on the main angle steel member of the tower.

[0021] In one embodiment, for the aforementioned insulator string, the upper end of the insulator string is suspended from the crossarm body 1, and the lower end is hinged to a wire-laying pulley, which is used to support and guide the construction conductor or traction rope.

[0022] In one embodiment, for the aforementioned safety protection component, the railing posts of the safety protection component are used to lay safety ropes and safety nets, the walkway treads are laid on the upper surface of the crossarm to form a personnel working passage, and safety warning signs are set at both ends of the crossarm.

[0023] In one embodiment, the entire device is a fully metal bolted connection structure, and all components are detachable and can be repeatedly disassembled and reused.

[0024] Example 1 (Standard Implementation Scheme): The device in this example is assembled from the crossarm body 1, tower connection components, cable support and guide components, and safety protection components. It is suitable for conventional 10kV~220kV overhead line crossing / crossing live lines construction. Crossbeam main body processing: The main beam is made of two parallel equilateral angle steels, and the transverse short angle steels are bolted together to form a rectangular frame; an inner and outer tube expansion structure is adopted, with a foundation section of 3m. The inner tube slides inside the outer tube, and the locking bolts penetrate the tube wall to lock the expansion length. The total length of 3~8m can be spliced ​​as needed to adapt to different spans.

[0025] Tower connection component fabrication: The clamps are made of Q235 steel plate stamped into a two-semi-circular structure, with a 5mm thick anti-slip rubber pad vulcanized and bonded to the inner ring. The two sets of semi-circular clamps are locked to the tower by multiple sets of adjusting bolts; steel connecting lugs are welded to the outside of the clamps, and the lugs are hinged and locked to the end of the crossarm using 8.8 grade high-strength bolts; for angle steel towers, the clamps can be replaced with clip-on angle steel brackets, which are directly clamped to the main material of the tower.

[0026] Cable support and guide assembly installation: A set of assemblies is installed every 0.8~1.2m along the length of the crossarm. The upper end of the insulator string is hung on the reserved hanging hole of the crossarm, and the lower end is suspended by a nylon cable laying pulley. The conductor and traction rope are passed through the pulley groove to guide the cable laying. In the case of a small number of lines, the pulley can be replaced with a fixed insulating hanging ring.

[0027] Safety protection component assembly: vertical bolts are used to fix the railing posts on both sides of the crossarm, and safety ropes / safety nets are tied between the posts; anti-slip patterned steel plates are laid flat on the upper surface of the crossarm as walkway steps, and red and white warning signs are affixed to both ends of the device.

[0028] On-site installation and usage steps: ① Tighten the sleeve bolts to the designed length of the telescopic crossarm body according to the span width; ② The clamps and connecting lugs are pre-installed on both ends of the crossarm on the ground; ③ The crane lifts the entire assembly to the preset installation height on the tower; ④ Tighten the clamp adjusting bolts to secure the device firmly to the tension tower / terminal tower body; ⑤ Install insulators, wire-laying pulleys, safety railings and walkway slabs on the crossarm in stages; ⑥ Carry out conductor laying operations; ⑦ After construction is completed, disassemble in reverse order: first remove the protective parts → remove the guide pulleys → loosen the clamp bolts → hoist the whole unit to the ground, disassemble and store it.

[0029] Actual construction data: Under the same cross-line working conditions, the construction cycle of traditional steel pipe crossing frame is 10 days, while the construction of this device only takes 4 days; the safety distance control accuracy is improved from ±0.3m by manual measurement to ±0.1m by laser measurement and control; the incidence of high-altitude construction safety accidents is reduced from 0.5‰ to 0.1‰, verifying the practicality and safety advantages of the product.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of the invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A temporary crossarm device for overhead lines without crossing frames, characterized in that: Includes the crossarm body (1), tower connection components, cable support and guide components, and safety protection components; The crossarm body (1) is a rigid frame structure and adopts an inner and outer sleeve telescopic locking structure; The pole and tower connection assembly is set at the end of the crossarm body (1) and includes a pair of semi-circular clamps, adjusting bolts and connecting ear plates. The inner side of the clamps is provided with anti-slip rubber pads. The clamps can be detachably fixed to the crossarm body (1) and the pole and tower via the connecting ear plates. The cable support and guide assembly is fixed at intervals on the crossarm body (1) and consists of insulator strings and cable-laying pulleys; The safety protection components are installed on the sides and top of the crossarm body and include guardrail posts and anti-slip walkway treads.

2. The temporary crossarm device for overhead lines without crossing frames according to claim 1, characterized in that, The main body of the crossarm (1) is formed by bolting together two parallel angle steel main beams and multiple transverse connecting rods. The standard length of a single section is 3m. The overall length is fixed by sliding expansion and contraction of inner and outer sleeves and locking bolts.

3. A temporary crossarm device for overhead lines without crossing frames according to claim 2, characterized in that, The clamp of the pole and tower connection assembly is compatible with round cement poles and angle steel towers. Under tower installation conditions, the clamp can be replaced with a bracket structure that is clamped onto the main angle steel member of the tower.

4. A temporary crossarm device for overhead lines without crossing frames according to claim 3, characterized in that, The upper end of the insulator string is suspended from the crossarm body (1), and the lower end is hinged to a wire-laying pulley, which is used to support and guide the construction wire or traction rope.

5. A temporary crossarm device for overhead lines without crossing frames according to claim 4, characterized in that, The safety protection components include railing posts for laying safety ropes and safety nets, walkway treads laid on the upper surface of the crossarm to form a personnel working passage, and safety warning signs set at both ends of the crossarm.

6. A temporary crossarm device for overhead lines without crossing frames according to claim 5, characterized in that, The entire device features an all-metal bolted connection structure, and all components are detachable and can be repeatedly disassembled and reused.

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