Installation method of live cross-over line protection device

Abstract

The application discloses a kind of live cross-over pole line protection device installation method, comprising the following steps: first, the rotating pair formed by pin connection between lower section vertical pole and ground column, then the base is fixed on the ground by ground nail, linear slide rail is welded on lower section vertical pole, slider on linear slide rail realizes linear motion, lower section vertical pole and multiple middle section vertical poles are fixed by threaded fastener;Second, the assembly of upper section vertical pole and related components, including welding counterweight and limiting rope, after the assembly of upper section vertical pole is completed, the assembly of upper section vertical pole and middle section vertical pole is carried out by threaded fastener;Finally, after the whole pole assembly is completed, the process of pole straightening is realized under the action of pull rope.Compared with existing cross-over pole, high-altitude operation is not needed, the assembly of device is completed on the ground, easy to construct, and the safety factor is high.

Description

[0001] This application is a divisional application based on Chinese Patent No. 201710232409X, entitled "A Protective Device for Live Overhead Lines", filed by the applicant on April 11, 2017. At least part of the original specification is incorporated herein by reference. Technical Field

[0002] This invention relates to the field of power transmission and transformation line construction, and in particular to a protective device that can prevent the line from falling and damaging the line being crossed during the construction of high-voltage lines. Background Technology

[0003] Live-line crossing, also known as uninterrupted crossing, refers to crossing a power line that is energized during the erection of the crossing frame, and the power line should be de-energized during the erection or dismantling of the crossing frame. In the construction of transmission lines, conductors and ground wires are frequently crossed over energized lines. Currently, most transmission line projects in my country use the de-energized crossing method for conductor and ground wire installation, which affects the economic efficiency of power supply departments and is slow. Using live-line crossing frames can reduce power outage losses, improve power supply reliability and construction speed, and is the direction for the development of transmission line construction. However, research on live-line crossing both domestically and internationally generally only considers meeting regulatory requirements in construction practice, without considering the workload and crop damage compensation. Therefore, a live-line crossing technology that meets power grid regulations, occupies a small area, and has a simple and reliable construction process is an urgent problem to be solved.

[0004] Live-line crossing technology originated from power outage operations. To achieve the goal of short-term or uninterrupted power outages, the earliest live-line crossing technology evolved using wooden (bamboo, steel) overhead lines. Besides wood and bamboo, steel pipes are also used as materials for crossing frames. Internationally, Dixon Scaffold in the UK successfully crossed a 132kV line using steel crossing frames; domestically, wooden (bamboo, steel) crossing frames are one of the commonly chosen live-line crossing technologies for low-voltage lines. Currently, the most commonly used integrated crossing frames in China include: tension live-line crossing frames; double-column parallel crossing frames; lifting live-line crossing frames; and multi-functional live-line crossing frames. However, existing crossing frames suffer from complex installation and relatively low safety factors. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a method for installing a live overhead power line protection device, which can quickly and safely perform protection work without interrupting power during high-voltage overhead line construction.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a method for installing a live-line crossing protection device, wherein the live-line crossing protection device is symmetrically arranged on both sides of the line being crossed, including a pole fixed upright to the ground. The pole includes a lower section pole, an upper section pole, and at least one middle section pole located between the lower and upper sections pole. The lower section pole, the middle section pole, and the upper section pole are assembled together by threaded fasteners. A ground post is provided on the ground. The lower section pole is connected to the ground post by a pin. The bottom of the lower section pole and the ground post are both located in a base. The base is fixed to the ground by ground nails. Several guy wires are evenly distributed along the circumference of the pole. The guy wires are connected to ground anchors and tighten the pole. The guy wires include an upper guy wire connected to the upper section pole and evenly distributed in a circle, and a lower guy wire connected to the middle section pole and evenly distributed in a circle. The lower guy wire is connected to the ground anchor by double hooks. The upper pull line is connected to the ground anchor via a lever hoist; the top of the upper section of the upright is hinged with a rocker arm, the front of the rocker arm is equipped with a protective net, and the rear of the rocker arm is equipped with a counterweight. The lower section of the upright is equipped with a linear guide rail, and the linear guide rail contains a slider that can slide up and down along the linear guide rail. The slider is connected to the pull rope and the traction rope. The pull rope is connected to the front side of the rocker arm, and the traction rope is connected to the traction device. The traction device includes a traction motor and a pulley block. The traction motor winds the traction rope around the pulley block, causing the slider to move downward along the linear guide rail. In the non-working state, the rocker arm rotates backward under the action of the counterweight. In the working state, the traction device pulls the traction rope, and the traction rope pulls the slider to slide downward along the linear guide rail, and drives the pull rope to pull the rocker arm downward, so that the rocker arm rotates forward to a horizontal position, thereby connecting the rocker arms on both sides of the crossed line. The protective net on the rocker arm covers the crossed line.

[0007] The installation method for live-line crossing protection devices includes the following steps:

[0008] First, a rotating pair is formed between the lower section of the upright and the ground column by a pin connection. Then, the base is fixed to the ground with ground nails. A linear slide rail is welded onto the lower section of the upright, and a slider on the linear slide rail achieves linear movement. The lower section of the upright and multiple middle sections of the upright are fixed with threaded fasteners.

[0009] Next, the upper section of the upright and related components are assembled, including welding the counterweight and the limiting rope. After the upper section of the upright is assembled, the upper section and the middle section of the upright are assembled using threaded fasteners.

[0010] Finally, after the entire pole assembly is completed, the pole is erected using the pull ropes.

[0011] Preferably, working and non-working limit switches are welded onto the upper section of the upright to respectively limit the working and non-working positions of the rocker arm.

[0012] Preferably, the upper section of the upright is provided with a clamping clamp for clamping and fixing, and a bearing is provided between the clamping clamp and the rocker arm to form a rotating pair between the clamping clamp and the rocker arm.

[0013] As a preferred method, after being erected, it is positioned with the aid of a base, and connected to a ground anchor by the evenly distributed pull lines and pull lines, as well as a lever hoist and double hooks, thus achieving safe positioning under the action of tension.

[0014] As a preferred method, before construction, the number of poles needed for the middle section is calculated based on the height of the line to be crossed and a certain safety height; considering the weight of the rocker arm itself and the impact force exerted when the line falls onto the safety net, the specifications of the pull rope and limit rope are calculated according to empirical formulas, and the weight of the required counterweight is calculated based on the weight of the rocker arm with net and the net to achieve a balancing effect; the traction force of the corresponding pull rope is calculated based on the traction force required for the rocker arm to rotate, thereby selecting the appropriate traction motor and traction rope and selecting the pulley block.

[0015] As a preferred method, after the cable laying is completed, the traction force is slowly unloaded, and under the action of the counterweight, the rocker arm returns to the non-working state. Then, the pole is lowered and the various parts are disassembled.

[0016] The live-line crossing protection device is symmetrically arranged on both sides of the line being crossed. Its position is determined by the width of the line being crossed, and the working length of the rocker arm is also determined by this width.

[0017] In the non-working state, the rocker arm and pole are assembled on the ground. Under the action of the counterweight, the rocker arm rotates backward. The protective net of the rocker arm will not cross the live power line being crossed during the process of the pole being erected.

[0018] During operation, the rocker arm rotates to a plane perpendicular to the pole to achieve docking, so that the protective netting on the rocker arm is positioned above the line being crossed, thereby protecting the line being crossed.

[0019] Compared with existing crossing frames, it does not require high-altitude operations. The assembly of the device is completed on the ground. After the pole is erected, the device protects the live lines. It is easy to construct, has a high safety factor, and is easy to transport and assemble, with high recycling efficiency. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 for Figure 1 A-direction view;

[0023] Figure 3for Figure 1 Enlarged view at point II;

[0024] Figure 4 A schematic diagram of the connection structure between the mast and the rocker arm;

[0025] Figure 5 This is a schematic diagram of the rocker arm assembly structure;

[0026] Figure 6 A schematic diagram of the connection structure between the support pole, ground column, and base;

[0027] Figure 7 This is a schematic diagram of the present invention when it is symmetrically arranged on both sides of the crossed line.

[0028] Figure label:

[0029] 1. Pole, 2. Counterweight, 3. Rocker arm, 4. Limiting rope, 5. Upper section pole, 6. Middle section pole, 7. Linear guide rail, 8. Slider, 9. Lower section pole, 10. Base, 11. Pulley block, 12. Traction motor, 13. Ground anchor, 14. Lever hoist, 15. Double hook, 16. Pull line, 17. Pull line, 18. Pull rope, 19. Working limit switch, 20. Non-working limit switch, 21. Protective net, 22. First threaded fastener, 23. Bearing, 24. Clamping clamp, 25. Second threaded fastener, 26. Pin, 27. Ground post, 28. Ground nail. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0031] like Figure 1 and Figure 2 As shown, a live-line crossing protection device includes a fixed, upright pole 1. The pole 1 has a cylindrical hollow structure (an LB-3 type pole can also be used, depending on the actual situation; its main function is to provide support). The pole 1 includes a lower section pole 9, an upper section pole 5, and at least one middle section pole 6 located between the lower section pole 9 and the upper section pole 5. The height of the device can be adjusted according to the height of the line being crossed, mainly utilizing the middle section pole 6. Generally, the lower section pole is 8 meters high, the upper section pole is 8 meters high, and the single middle section pole is 6 meters high. The number of middle section poles can be determined according to actual needs.

[0032] The support pole 1 has several guy wires evenly distributed along its circumference. These guy wires are connected to the ground anchor 13 and tighten the support pole. Specifically, in this embodiment, the guy wires include an upper guy wire 17 connected to the upper section of the support pole 5 and evenly distributed in a circle, and a lower guy wire 16 connected to the middle section of the support pole 6 and also evenly distributed in a circle. The lower guy wire 16 is connected to the ground anchor 13 via a double hook 15, and the upper guy wire 17 is connected to the ground anchor via a lever hoist 14. The guy wires ensure the safe positioning of the entire device.

[0033] The lower section of the upright 9 is provided with a linear guide rail 7, and a slider 8 that can slide up and down along the linear guide rail is provided in the linear guide rail 7. The slider 8 is connected to the pull rope 18 and the traction rope. The pull rope is connected to the front side of the rocker arm, and the traction rope is connected to the traction device.

[0034] Working limit switch 19 and non-working limit switch 20 are welded onto the upper section of the pole 5 to limit the working and non-working positions of the rocker arm 3. The working limit switch 19 prevents the rocker arm from being in an unusual position, and the working limit switch 18 and the limit rope 4 prevent the rocker arm from rotating too much and affecting the crossed line.

[0035] The upper section of the upright is equipped with annular grooves to position the clamping fixture. Every 3 meters, there is an annular groove equipped with a corresponding working limit 19 and non-working limit 20, as well as a limit rope 4, to limit the rocker arm. Both the working limit 19 and non-working limit 20 are held in place in the annular groove by clamping fixtures (such as clamps).

[0036] like Figure 3 As shown, the lower section upright 9, the middle section upright 6, and the upper section upright 5 are assembled together by the first threaded fastener 22.

[0037] like Figure 2 , Figure 4 and Figure 5 As shown, a protective net 21 is provided at the front of the rocker arm 3, and a clamping clamp 24 is provided on the upper section of the upright 5. The clamping clamp 24 is clamped and fixed by a second threaded fastener 25. A bearing 23 is provided between the clamping clamp 24 and the rocker arm 3. The clamping clamp is provided with a rotating shaft. The bearing is installed on the rocker arm 3, and the rotating shaft is supported on the bearing 23 so that a rotating pair is formed between the clamping clamp 24 and the rocker arm 3.

[0038] like Figure 6 As shown, a ground post 27 is provided on the ground, and the lower section of the upright 9 is connected to the ground post 27 via a pin 26. Moreover, the bottom of the lower section of the upright and the ground post are both located inside the base 10, and the base 10 is fixed to the ground by ground nails 28.

[0039] like Figure 7As shown, this device is symmetrically arranged on both sides of the line being crossed, with its position determined by the width of the line. The working length of the rocker arm is also determined by this width. During operation, the rocker arm rotates to a plane perpendicular to the support pole to achieve docking, thereby protecting the line being crossed.

[0040] In the non-working state, the rocker arm 3 and the pole 1 are assembled on the ground. Under the action of the counterweight 2, the rocker arm 3 rotates backward. The protective net 21 of the rocker arm 3 will not cross the live line being crossed during the process of the pole being erected.

[0041] The traction device includes a traction motor 12 and a pulley block 11. When working, the traction motor 12 winds the traction rope, pulls the slider 8 to move downward along the linear slide rail 7, drives the pull rope 18, and thus pulls the rocker arm 3 to rotate to the working position, that is, the horizontal position, so as to protect the crossed circuit.

[0042] Because the rocker arm itself can hold a protective net, and by utilizing the working principle of a crank-slider, the rocker arm rotates during the linear motion of the slider, rotating to a plane perpendicular to the support rod, thus protecting the line and increasing the protection range.

[0043] On the ground, it can be followed Figure 4 and Figure 5 As shown, the assembly of the rocker arm 3 and the clamping fixture 24 mainly involves the assembly of the bearing 23, ensuring that the rocker arm 3 and the clamping fixture 24 can form a rotating pair. Furthermore, a protective net 21 is hung on the ground.

[0044] Before construction, the number of middle-section poles 6 needed is calculated based on the height of the line to be crossed and a certain safety height. Considering the weight of the rocker arm itself and the impact force exerted when the line falls onto the safety net, the specifications of the pull rope 18 and the limiting rope 4 are calculated according to empirical formulas. The weight of the counterweight 2 required is calculated based on the weight of the rocker arm with net and the net to achieve a balancing effect. The traction force of the pull rope 18 is calculated based on the traction force required for the rotation of the rocker arm 3, thereby selecting the appropriate traction motor 12, traction rope, and pulley block 11.

[0045] After all the parts have been selected, according to Figure 1 Assembly of this device is achieved by first forming a rotating joint between the lower upright 9 and the ground column 27 via pin 26, and then fixing the base 10 to the ground with ground nails 28. A linear slide rail 7 is welded onto the lower upright 9, and a slider 8 on the linear slide rail 7 enables linear movement. The lower upright 9 can be fixed to multiple intermediate uprights 6 using threaded fasteners.

[0046] Next, the upper section of the upright pole 5 and related components are assembled. The annular groove on the upper section of the upright pole 5 can position and clamp the clamp 24, thereby realizing the assembly of the rocker arm 3 and the upper section of the upright pole 5. After the assembly is completed, the counterweight 2 and the limiting rope 4 can be welded on. The upper section of the upright pole 5 also needs to have the working limit 19 and the non-working limit 20 welded around the annular groove.

[0047] After the upper section of the upright 5 is assembled, the upper section and the middle section of the upright are assembled using threaded fasteners.

[0048] After the entire boom 1 is assembled, it is uprighted by the pull rope 18. At this time, due to the counterweight 2, the entire rocker arm 3 is in an upright state, i.e., a non-working state. After being upright, it can be positioned with the assistance of the base 10, and connected to the ground anchor 13 by the evenly circumferentially arranged upper and lower pull lines 17 and 16, as well as the lever hoist 14 and double hooks 15, achieving safe positioning under the action of tension.

[0049] During operation, the traction motor 12 winds the traction rope, pulling the slider 8 to move the slider downwards, which in turn drives the pull rope 18, thereby pulling the rocker arm 3 to rotate to the working position, i.e., the horizontal position, to protect the circuit being crossed.

[0050] After the cable laying is completed, the traction force is slowly unloaded. Under the action of the counterweight 2, the rocker arm 3 returns to the non-working state. Then, the pole 1 is lowered and the various parts are disassembled.

[0051] According to the rules implemented by this device, it can be recycled and is easy to install, disassemble and transport.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A method for installing a live-line crossing protection device, characterized in that: The live-line crossing protection device is symmetrically arranged on both sides of the crossed line, including a pole fixed upright to the ground. The pole comprises a lower section, an upper section, and at least one middle section located between the lower and upper sections. The lower, middle, and upper sections are assembled together with threaded fasteners. A ground post is provided on the ground, and the lower section is pinned to the ground post. The bottom of the lower section and the ground post are both located within a base, which is fixed to the ground with ground nails. Several guy wires are evenly distributed along the circumference of the pole. The guy wires are connected to ground anchors and tighten the pole. The guy wires include upper guy wires connected to the upper section and evenly distributed in a circle, and lower guy wires connected to the middle section and evenly distributed in a circle. The lower guy wires are connected to the ground anchors via double hooks, and the upper guy wires are connected to the ground anchors via lever hoists. A rocker arm is hinged to the top of the vertical pole section. A protective net is provided at the front of the rocker arm, and a counterweight is provided at the rear of the rocker arm. A linear guide rail is provided on the lower vertical pole section. A slider that can slide up and down along the linear guide rail is provided in the linear guide rail. The slider is connected to a pull rope and a traction rope. The pull rope is connected to the front side of the rocker arm, and the traction rope is connected to a traction device. The traction device includes a traction motor and a pulley block. The traction motor winds the traction rope around the pulley block, causing the slider to move downward along the linear guide rail. In the non-working state, the rocker arm rotates backward under the action of the counterweight. In the working state, the traction device pulls the traction rope, and the traction rope pulls the slider to slide downward along the linear guide rail, and drives the pull rope to pull the rocker arm downward, so that the rocker arm rotates forward to a horizontal position, thereby connecting the rocker arms on both sides of the crossed line. The protective net provided on the rocker arm covers the crossed line. The installation method for live-line crossing protection devices includes the following steps: First, a rotating pair is formed between the lower section of the upright and the ground column by a pin connection. Then, the base is fixed to the ground with ground nails. A linear slide rail is welded onto the lower section of the upright, and a slider on the linear slide rail achieves linear movement. The lower section of the upright and multiple middle sections of the upright are fixed with threaded fasteners. Next, the upper section of the upright and related components are assembled, including welding the counterweight and the limiting rope. After the upper section of the upright is assembled, the upper section and the middle section of the upright are assembled using threaded fasteners. Finally, after the entire pole assembly is completed, the pole is erected using the pull ropes.

2. The installation method of a live-line crossing protection device according to claim 1, characterized in that: The upper section of the upright is welded with working and non-working limit switches to define the working and non-working positions of the rocker arm, respectively.

3. The installation method of a live-line crossing protection device according to claim 1, characterized in that: The upper section of the upright is equipped with a clamping clamp for clamping and fixing. A bearing is provided between the clamping clamp and the rocker arm to form a rotating pair between the clamping clamp and the rocker arm.

4. The installation method of a live-line crossing protection device according to claim 1, characterized in that: After being erected, it is positioned with the aid of the base, and connected to the ground anchor by the evenly distributed upper and lower pull lines, as well as the hand lever hoist and double hooks, achieving safe positioning under the action of tension.

5. The installation method of a live-line crossing protection device according to claim 1, characterized in that: Before construction, the number of poles needed for the middle section is calculated based on the height of the line to be crossed and a certain safety height. Considering the weight of the rocker arm itself and the impact force exerted when the line falls onto the safety net, the specifications of the pull rope and limit rope are calculated according to empirical formulas. The weight of the counterweight block required is calculated based on the weight of the rocker arm with net and the net to achieve a balancing effect. The traction force of the corresponding pull rope is calculated based on the traction force required for the rocker arm to rotate, thereby selecting the appropriate traction motor, traction rope, and pulley block.

6. The installation method of a live-line crossing protection device according to claim 1, characterized in that: After the cable laying is completed, the traction force is slowly unloaded. Under the action of the counterweight, the rocker arm returns to the non-working state. Then the pole is lowered and the various parts are disassembled.

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