A composite insulated support bracket for 220KV live crossing construction

Abstract

This application relates to the field of live-line crossing construction technology, specifically disclosing a composite insulated support bracket for 220kV live-line crossing construction. The base and multiple sets of rollers form a movable unit, allowing the entire bracket to move freely on the construction site, eliminating the need for traditional scaffolding assembly and disassembly processes. A multi-stage telescopic mechanism drives the support bracket to rise and fall, and an adjustment mechanism further adjusts the overall pitch angle of the bracket, enabling it to quickly reach the predetermined working height and tilt position without relying on ground flatness. This structure completely replaces the component assembly method, achieving integrated transportation and rapid positioning of the support bracket, significantly shortening the preparation time for crossing construction.

Description

Technical Field

[0001] This application relates to the field of live-line crossing construction technology, and in particular to a composite insulated support bracket for 220KV live-line crossing construction. Background Technology

[0002] In the reconstruction or expansion of 220kV and above high-voltage transmission lines, it is often necessary to lay new conductors across existing lines without interrupting power supply—a process known as live-line crossing. This type of construction demands extremely high safety distance control; even slight negligence can lead to equipment discharge or power grid accidents. Therefore, reliable insulation devices must be used to ensure the safety of construction personnel, equipment, and operating lines. Traditional methods rely on power outages or the erection of metal crossing frames, which not only cause power loss but also have significant limitations in demanding scenarios such as crossing railways and highways.

[0003] Currently, in live-line crossing construction, insulated support brackets are commonly used as the core protective device. Their basic structure is usually formed by scaffold-style insulated poles, creating a trapezoidal or portal frame. During construction, the main body of the bracket needs to be assembled on the ground on both sides of the line to be crossed. Then, insulated crossarms and a capping net are erected manually or mechanically, ultimately forming an insulated passage higher than the live line, allowing the new conductor to safely cross the existing line under isolation protection.

[0004] However, the core problem with existing insulated support scaffolds lies in their low on-site assembly efficiency: they employ a standard scaffolding structure, requiring construction workers to assemble hundreds of insulated pipes one by one on-site and secure them with numerous bolts. Each erection requires an average of 6-8 person-hours, and the entire process relies on workers climbing the scaffolding to install horizontal members and diagonal braces. The assembly and disassembly processes are time-consuming and labor-intensive, resulting in low operational efficiency. Utility Model Content

[0005] To improve work efficiency, this application provides a composite insulated support bracket for 220KV live crossing construction.

[0006] This application provides a composite insulated support bracket for 220KV live-line crossing construction, which adopts the following technical solution:

[0007] A composite insulated support bracket for 220KV live-line crossing construction is provided, comprising two sets, including a base, with multiple sets of rollers for movement on the base, a support bracket and a multi-stage telescopic mechanism for driving the support bracket to rise and fall on the base, the support bracket being fixed to the upper end of the multi-stage telescopic mechanism, and an adjustment mechanism for adjusting the angle of the support bracket being provided between the lower end of the multi-stage telescopic mechanism and the base.

[0008] By adopting the above technical solution, the mobile unit composed of the base and multiple sets of rollers allows the entire support structure to move freely on the construction site, eliminating the need for traditional scaffolding assembly and disassembly processes. A multi-stage telescopic mechanism drives the lifting and lowering of the support structure, and an adjustment mechanism allows for pitch angle adjustment of the entire support structure, enabling it to quickly reach the predetermined working height and tilt posture without relying on ground flatness. This structure completely replaces the component assembly method, achieving mechanized transportation and rapid positioning of the support structure, significantly shortening the preparation time for construction projects.

[0009] Optionally, the multi-stage telescopic mechanism includes an adjusting arm, a first-stage telescopic arm, a second-stage telescopic arm, a third-stage telescopic arm, a first-stage hydraulic cylinder, a second-stage hydraulic cylinder, and a third-stage hydraulic cylinder. The adjusting arm, the first-stage telescopic arm, the second-stage telescopic arm, and the third-stage telescopic arm are sequentially slidably connected to each other, and the end of the adjusting arm away from the first-stage telescopic arm is connected to the adjusting mechanism, and the end of the third-stage telescopic arm away from the second-stage telescopic arm is fixedly connected to the support bracket.

[0010] The first-stage hydraulic cylinder is fixed to the adjusting arm and its telescopic end is fixedly connected to the first-stage telescopic arm. The second-stage hydraulic cylinder is fixed to the first-stage telescopic arm and is fixedly connected to the second-stage telescopic arm. The third-stage hydraulic cylinder is fixed to the second-stage telescopic arm and is fixedly connected to the third-stage telescopic arm.

[0011] By adopting the above technical solution, a nested sliding plug-in structure of the adjusting arm, first-stage telescopic arm, second-stage telescopic arm, and third-stage telescopic arm, combined with the independent drive control of the first-stage, second-stage, and third-stage hydraulic cylinders, forms a three-stage progressive telescopic mechanism. This design maintains a compact, retractable configuration while achieving millimeter-level height adjustments to the support bracket through precise stroke control of the hydraulic cylinders, meeting the stringent requirements for the height of the insulated passage during 220kV live-line crossing construction.

[0012] Optionally, the adjustment mechanism includes a fixed base, an adjustment cylinder, and an adjustment seat. The fixed base is fixed to the base, and the adjustment seat is used to fix the end of the adjustment arm away from the first-stage telescopic arm. Multiple sets of adjustment cylinders are provided, and each adjustment cylinder is respectively arranged between the fixed base and the adjustment seat.

[0013] Multiple tilt sensors are evenly distributed along the edge of the adjustment base. A control system is installed on the base. Each tilt sensor, adjustment cylinder, primary hydraulic cylinder, secondary hydraulic cylinder, and tertiary hydraulic cylinder is electrically connected to the control system.

[0014] By adopting the above technical solution, multiple sets of adjusting cylinders between the fixed base and the adjusting base constitute a multi-directional leveling execution unit, which, together with tilt sensors evenly distributed along the edge of the adjusting base, monitors the posture of the support in real time. The control system dynamically adjusts the stroke of each adjusting cylinder based on the tilt data, ensuring that the support support always maintains a horizontal reference. This closed-loop control system effectively overcomes the tilting problem of the support caused by complex terrain, significantly reduces the horizontality error of the working plane of the insulation channel, and ensures safe distance control during the conductor laying process.

[0015] Optionally, the support bracket is provided with multiple sets of guide wheels for driving the line through, and each guide wheel is rotatably mounted on the support bracket.

[0016] By adopting the above technical solution, multiple sets of guide wheels on the support bracket form a continuous rolling contact surface. When the conductor passes through, the guide wheels convert sliding friction into rolling friction, significantly reducing the risk of conductor sheath wear. This structure allows the new conductor to maintain a uniform and smooth movement during the crossing process, avoiding conductor jumping caused by sudden changes in friction in traditional trolley-type channels, and reducing the risk of loss of control over the safety distance.

[0017] Optionally, a limit baffle for limiting the movement of the line is provided between the guide wheels of different groups.

[0018] By adopting the above technical solution, limiting baffles are set between different groups of guide wheels, forming a physical barrier zone on the conductor's travel path. When the conductor deviates due to wind or traction, the sidewall of the limiting baffle can promptly prevent it from leaving the working area of ​​the guide wheel group, preventing the conductor from sliding into the non-insulated area and ensuring that the entire energized crossing is within a controllable shielding protection range.

[0019] Optionally, multiple sets of lifting cylinders are evenly distributed on the base, each lifting cylinder is electrically connected to the control system, and each lifting cylinder is provided with a lifting support leg at its lower end.

[0020] By adopting the above technical solution, multiple sets of lifting cylinders and lifting outriggers evenly distributed on the base extend synchronously to contact the ground under the command of the control system, forming distributed support points. When the support is raised to the working height, the lifting outriggers transfer the weight of the support from the rollers to the ground contact surface, effectively suppressing the slight swaying of the hydraulic system under load and improving the wind load stability under large-span conditions.

[0021] In summary, this application includes at least the following beneficial technical effects:

[0022] This application achieves seamless transport without disassembly by integrating rollers on the base. Combined with the synergistic effect of multi-stage telescopic and adjustment mechanisms, it replaces the traditional scaffolding component assembly mode. Once the support reaches the construction site, the height of the support can be directly adjusted by hydraulically driving the multi-stage telescopic mechanism, and the angle adjustment mechanism can be used to adapt to sloping terrain, enabling the insulated passage to quickly reach the predetermined working posture. This reduces construction preparation time by more than 60%, fundamentally solving the industry pain point of low on-site assembly efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the insulating support bracket in the embodiments of this application;

[0024] Figure 2 yes Figure 1 A schematic diagram of the overall structure of one of the insulating support brackets.

[0025] Reference numerals: 1. Base; 11. Roller; 12. Lifting cylinder; 13. Lifting outrigger; 14. Support bracket; 2. Multi-stage telescopic mechanism; 21. Adjusting arm; 22. First-stage telescopic arm; 23. Second-stage telescopic arm; 24. Third-stage telescopic arm; 25. First-stage hydraulic cylinder; 26. Second-stage hydraulic cylinder; 27. Third-stage hydraulic cylinder; 3. Adjusting mechanism; 31. Fixed seat; 32. Adjusting cylinder; 33. Adjusting seat; 4. Guide wheel; 5. Limiting baffle. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail below.

[0027] This application discloses a composite insulating support bracket for 220KV live crossing construction.

[0028] Reference Figure 1 and Figure 2 A composite insulated support bracket for 220KV live crossing construction is provided, consisting of two sets, including a base 1, with multiple sets of rollers 11 for movement on the base 1, a support bracket 14 on the base 1, and a multi-stage telescopic mechanism 2 for driving the support bracket to rise and fall. The support bracket 14 is fixed to the upper end of the multi-stage telescopic mechanism 2, and an adjustment mechanism 3 for adjusting the angle of the support bracket is provided between the lower end of the multi-stage telescopic mechanism 2 and the base 1.

[0029] The base 1 and multiple sets of rollers 11 form a movable unit, allowing the entire support structure to move freely on the construction site, eliminating the need for traditional scaffolding assembly and disassembly processes. A multi-stage telescopic mechanism 2 drives the support frame 14 to rise and fall, while an adjustment mechanism 3 adjusts the overall pitch angle of the support structure, enabling it to quickly reach the predetermined working height and tilt position without relying on ground flatness. This structure completely replaces the component assembly method, achieving mechanized transportation and rapid positioning of the support frame, significantly shortening the preparation time for construction projects.

[0030] Reference Figure 1 and Figure 2 The multi-stage telescopic mechanism 2 includes an adjusting arm 21, a first-stage telescopic arm 22, a second-stage telescopic arm 23, a third-stage telescopic arm 24, a first-stage hydraulic cylinder 25, a second-stage hydraulic cylinder 26, and a third-stage hydraulic cylinder 27. The adjusting arm 21, the first-stage telescopic arm 22, the second-stage telescopic arm 23, and the third-stage telescopic arm 24 are sequentially slidably connected to each other. The end of the adjusting arm 21 away from the first-stage telescopic arm 22 is connected to the adjusting mechanism 3, and the end of the third-stage telescopic arm 24 away from the second-stage telescopic arm 23 is fixedly connected to the support bracket 14.

[0031] Reference Figure 1 and Figure 2 The first-stage hydraulic cylinder 25 is fixed on the adjusting arm 21 and its telescopic end is fixedly connected to the first-stage telescopic arm 22. The second-stage hydraulic cylinder 26 is fixed on the first-stage telescopic arm 22 and is fixedly connected to the second-stage telescopic arm 23. The third-stage hydraulic cylinder 27 is fixed on the second-stage telescopic arm 23 and is fixedly connected to the third-stage telescopic arm 24.

[0032] The nested sliding connection structure of the adjusting arm 21, the first-stage telescopic arm 22, the second-stage telescopic arm 23, and the third-stage telescopic arm 24, combined with the independent drive control of the first-stage hydraulic cylinder 25, the second-stage hydraulic cylinder 26, and the third-stage hydraulic cylinder 27, forms a three-stage progressive telescopic mechanism. This design maintains a compact, retractable configuration while achieving millimeter-level height adjustments to the support bracket 14 through precise stroke control of the hydraulic cylinders, meeting the stringent requirements for the height of the insulated passage during 220kV live-line crossing construction.

[0033] Reference Figure 1 and Figure 2 The adjustment mechanism 3 includes a fixed seat 31, an adjustment cylinder 32 and an adjustment seat 33. The fixed seat 31 is fixed on the base 1. The adjustment seat 33 is used to fix the end of the adjustment arm 21 away from the first-stage telescopic arm 22. Multiple sets of adjustment cylinders 32 are provided, and each adjustment cylinder 32 is arranged between the fixed seat 31 and the adjustment seat 33.

[0034] Multiple tilt sensors are evenly distributed along the edge of the adjusting seat 33. A control system is installed on the base 1. Each tilt sensor, adjusting cylinder 32, first-stage hydraulic cylinder 25, second-stage hydraulic cylinder 26, and third-stage hydraulic cylinder 27 are electrically connected to the control system.

[0035] Multiple sets of adjusting cylinders 32 between the fixed base 31 and the adjusting base 33 constitute a multi-directional leveling execution unit, which, together with tilt sensors evenly distributed along the edge of the adjusting base 33, monitors the posture of the support in real time. The control system dynamically adjusts the stroke of each adjusting cylinder 32 based on the tilt data, ensuring that the support support always maintains a horizontal reference. This closed-loop control system effectively overcomes the tilting problem of the support caused by complex terrain, ensures a significant reduction in the horizontality error of the working plane of the insulation channel, and guarantees safe distance control during the conductor laying process.

[0036] The support bracket is equipped with multiple sets of guide wheels 4 for driving the line through, and each guide wheel 4 is rotatably mounted on the support bracket.

[0037] Multiple sets of guide wheels 4 installed on the support bracket form a continuous rolling contact surface. When the conductor passes through, the guide wheels 4 convert sliding friction into rolling friction, significantly reducing the risk of conductor sheath wear. This structure allows the new conductor to maintain a uniform and smooth movement during the crossing process, avoiding conductor jumping caused by sudden changes in friction in traditional trolley-type channels, and reducing the risk of loss of control over the safety distance.

[0038] When it is necessary to move the conductor from one crossing frame to another, the conductor is carried by a drone and one end of the conductor is guided by four sets of guide wheels on two supports to achieve the crossing.

[0039] To ensure the wires can pass stably through two sets of guide wheels (4 sets), refer to... Figure 1 and Figure 2 Limiting baffles 5 are provided between different groups of guide wheels 4 to limit the movement of the line.

[0040] Limiting baffles 5 are installed between different groups of guide wheels 4, forming a physical barrier zone on the conductor's travel path. When the conductor deviates due to wind or traction, the sidewall of the limiting baffle 5 can promptly prevent it from leaving the working area of ​​the guide wheel group 4, preventing the conductor from sliding into the non-insulated area and ensuring that the entire energized crossing is within a controllable shielding protection range.

[0041] Reference Figure 1 and Figure 2 Multiple sets of lifting cylinders 12 are evenly distributed on the base 1. Each lifting cylinder 12 is electrically connected to the control system, and each lifting cylinder 12 is provided with a lifting support leg 13 at its lower end.

[0042] Multiple sets of lifting cylinders 12 and lifting outriggers 13, evenly distributed on the base 1, extend synchronously to contact the ground under the command of the control system, forming distributed support points. When the support is raised to the working height, the lifting outriggers 13 transfer the weight of the support from the rollers 11 to the ground contact surface, effectively suppressing the slight swaying of the hydraulic system under load and improving the wind load stability under large-span conditions.

[0043] The implementation principle of a composite insulated support bracket for 220KV live crossing construction according to an embodiment of this application is as follows: During implementation, two sets of brackets are moved to predetermined points on both sides of the crossing line via rollers 11 on the base 1. The control system activates the multi-stage telescopic mechanism 2: the first-stage hydraulic cylinder 25, the second-stage hydraulic cylinder 26, and the third-stage hydraulic cylinder 27 sequentially push the adjusting arm 21, the first-stage telescopic arm 22, the second-stage telescopic arm 23, and the third-stage telescopic arm 24 to extend step by step, raising the support bracket to the crossing height. The tilt sensor detects the tilt data of the adjusting seat 33 in real time, and the control system instructs each adjusting cylinder 32 to extend and retract differently, driving the fixed seat 31 to move relative to the adjusting seat 33 to level the support bracket. Subsequently, the lifting cylinder 12 extends the lifting leg 13 to the ground, transferring the weight of the bracket from the rollers 11 to the leg to enhance stability.

[0044] Finally, the new conductor, carried by a drone, is pulled across by four sets of guide wheels on the support bracket, and the limit baffle five constrains the lateral displacement of the conductor in real time, forming a safe and efficient live crossing construction channel.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite insulated support bracket for 220KV live-line crossing construction, comprising two sets, characterized in that: Includes a base (1), on which multiple sets of rollers (11) for movement are provided, and on which a support bracket (14) and a multi-stage telescopic mechanism (2) for driving the support bracket to rise and fall are provided. The support bracket (14) is fixed to the upper end of the multi-stage telescopic mechanism (2), and an adjustment mechanism (3) for adjusting the angle of the support bracket is also provided between the lower end of the multi-stage telescopic mechanism (2) and the base (1).

2. The composite insulating support bracket for 220KV live-line crossing construction according to claim 1, characterized in that: The multi-stage telescopic mechanism (2) includes an adjusting arm (21), a first-stage telescopic arm (22), a second-stage telescopic arm (23), a third-stage telescopic arm (24), a first-stage hydraulic cylinder (25), a second-stage hydraulic cylinder (26), and a third-stage hydraulic cylinder (27). The adjusting arm (21), the first-stage telescopic arm (22), the second-stage telescopic arm (23), and the third-stage telescopic arm (24) are sequentially slidably connected to each other. The end of the adjusting arm (21) away from the first-stage telescopic arm (22) is connected to the adjusting mechanism (3), and the end of the third-stage telescopic arm (24) away from the second-stage telescopic arm (23) is fixedly connected to the support bracket (14). The first-stage hydraulic cylinder (25) is fixed on the adjusting arm (21) and its telescopic end is fixedly connected to the first-stage telescopic arm (22). The second-stage hydraulic cylinder (26) is fixed on the first-stage telescopic arm (22) and is fixedly connected to the second-stage telescopic arm (23). The third-stage hydraulic cylinder (27) is fixed on the second-stage telescopic arm (23) and is fixedly connected to the third-stage telescopic arm (24).

3. The composite insulating support bracket for 220KV live-line crossing construction according to claim 2, characterized in that: The adjustment mechanism (3) includes a fixed seat (31), an adjustment cylinder (32), and an adjustment seat (33). The fixed seat (31) is fixed on the base (1). The adjustment seat (33) is used to fix the end of the adjustment arm (21) away from the first-stage telescopic arm (22). There are multiple sets of adjustment cylinders (32), and each adjustment cylinder (32) is arranged between the fixed seat (31) and the adjustment seat (33). Multiple tilt sensors are evenly distributed along the edge of the adjusting seat (33). A control system is provided on the base (1). Each tilt sensor, adjusting cylinder (32), first-stage hydraulic cylinder (25), second-stage hydraulic cylinder (26), and third-stage hydraulic cylinder (27) is electrically connected to the control system.

4. The composite insulating support bracket for 220KV live-line crossing construction according to claim 1, characterized in that: The support bracket is provided with multiple sets of guide wheels (4) for driving the line through, and each guide wheel (4) is rotatably mounted on the support bracket.

5. A composite insulating support bracket for 220KV live-line crossing construction according to claim 4, characterized in that: Limiting baffles (5) for limiting the movement of the guide wheels (4) in different groups are provided between them.

6. A composite insulating support bracket for 220KV live-line crossing construction according to claim 3, characterized in that: Multiple sets of lifting cylinders (12) are evenly distributed on the base (1). Each lifting cylinder (12) is electrically connected to the control system, and each lifting cylinder (12) is provided with a lifting support leg (13) at its lower end.

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