CN107221880B - Electrified crossing overhead line protection device - Google Patents

Abstract

The invention discloses a live crossing wire protection device, which is symmetrically arranged on both sides of the crossed line, and includes a fixed pole standing on the ground. The pole includes a lower pole, an upper pole, and a lower pole and an upper pole. At least one section of the middle vertical rod between the vertical rods, the lower vertical rod, the middle vertical rod and the upper vertical rod are assembled together by threaded fasteners, the top of the upper vertical rod is hinged with a rocker arm, the The front part of the rocker arm is provided with a protective net, the rear part of the rocker arm is provided with a counterweight, and the lower vertical pole is provided with a linear guide rail, and the linear guide rail is provided with a slider that can slide up and down along the linear guide rail , the slider is connected with the pull rope and the pull rope, the pull rope is connected with the front side of the rocker arm, and the pull rope is connected with the traction device. Compared with the existing spanning frame, the present invention does not need high-altitude operation, completes the assembly of the device on the ground, is easy to construct, and has high safety factor.

Description

A protective device for live crossing strung wires

technical field

The invention relates to the field of power transmission and transformation line construction, in particular to a protection device capable of preventing the line from falling and causing damage to the crossed line during the high-voltage line stringing process.

Background technique

Live crossing, also known as non-power-off crossing, means that the crossing power line is electrified when the wire is erected, and the power line should be cut off when the crossing frame is erected or dismantled. During the construction of transmission lines, conductors and ground wires are often straddled over live lines. At present, most of the conductor and ground wires of power transmission projects in my country adopt the method of power failure spanning, which affects the economic benefits of the power supply department, and the construction speed is slow. The use of live crossing frames can reduce power failure losses, improve power supply reliability and construction speed, and is the development direction of power transmission line construction. At the same time, domestic and foreign research on live crossing generally only considers meeting the code requirements in construction practice, but does not consider the construction workload and young crop compensation. A simple and reliable live leaping technology has become an urgent problem to be solved.

The live jumping technology originally originated from blackout operations. In order to achieve the goal of short-term power outage or non-power outage, the construction technology of wood (bamboo, steel) live wire spanning was first evolved. In addition to wood and moso bamboo, steel pipes are used as the material of the cross frame. Overseas, British Dixon Scaffold has used steel spanning frames to successfully cross 132kV lines; in China, wooden (bamboo, steel) spanning frames are one of the live spanning technologies often used for low-voltage line crossings. At present, there are many overall spanning frames used in China: tension non-stop power spanning frame; double-column parallel spanning frame; lifting live spanning frame; multi-functional live spanning frame. However, the existing spanning frame has the defects of complicated installation and low safety factor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a protective device for live spanning wires, which overcomes the disadvantages of complex installation and low safety factor of the existing spanning frames, so that it can be operated without power failure during the construction of high-voltage wires. Do a good job of protection quickly and safely.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solution: a live crossing wire protection device, which is symmetrically arranged on both sides of the crossed line, and includes a pole fixed upright on the ground, and the pole includes a lower pole, an upper pole The vertical rod and at least one middle vertical rod between the lower vertical rod and the upper vertical rod, the lower vertical rod, the middle vertical rod and the upper vertical rod are assembled together by threaded fasteners, and the vertical rod is along the circumferential direction A number of pull wires are evenly distributed, and the pull wires are connected to the ground anchor and tighten the holding rod. The top of the upper vertical rod is hinged with a rocker arm. Counterweight, the lower vertical rod is provided with a linear guide rail, the linear guide rail is provided with a slider that can slide up and down along the linear guide rail, the slider is connected with the pull rope and the pull rope, and the pull rope is connected with the swing The front side of the arm is connected, and the traction rope is connected with the traction device; under the action of the counterweight in the non-working state, the rocker arm rotates backwards, and in the working state, the traction device pulls the traction rope, and the traction rope pulls the slider along a straight line The guide rail slides down, and drives the pull rope to pull the rocker arm downward, so that the rocker arm rotates forward to a horizontal position, so that the rocker arms on both sides of the crossed line are docked, and the protective net cover set on the rocker arm is set above the crossed line .

As a preference, a working limit and a non-working limit are welded on the upper pole to respectively realize the limitation of the working state and the non-working state position of the rocker arm.

As a preference, the upper pole is provided with a clamp for clamping and fixing, and a bearing is provided between the clamp and the rocker arm so that a rotation pair is formed between the clamp and the rocker arm.

Preferably, the pull wires include an upper pull wire connected to the upper pole and arranged in a uniform circumference, and a pull wire connected to the middle vertical rod and arranged in a uniform circumference. The pull wire is connected to the ground anchor through a double hook. The upper pull wire is connected to the ground anchor through a lever block.

Preferably, a ground post is provided on the ground, and the lower vertical rod is connected to the ground post through pins.

Preferably, the bottom of the lower pole and the ground column are both arranged in the base, and the base is fixed on the ground by ground nails.

Preferably, the traction device includes a traction motor and a pulley block, and the traction motor rolls a traction rope and bypasses the pulley block to drive the slider to move down along the linear guide rail.

The present invention is arranged symmetrically on both sides of the crossed line, the position is determined by the width of the crossed line, and the working length of the rocker arm is also determined by the width. When working, the rocker arm rotates to a plane perpendicular to the pole to realize docking, so that the protective net cover set on the rocker arm is set above the crossed line, thereby protecting the crossed line.

Compared with the existing spanning frame, the present invention does not need high-altitude operations, and the assembly of the device is completed on the ground. After the pole is erected, the protection of the live line is realized through the device, which is easy to construct, has a high safety factor, and is easy to transport and assemble, and has a high recycling efficiency. high.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a view from direction A in Fig. 1;

Figure 3 is an enlarged view of II in Figure 1;

Fig. 4 is a schematic diagram of the connection structure between the pole and the rocker arm;

Figure 5 is a schematic diagram of the assembly structure of the rocker arm;

Fig. 6 is a schematic diagram of the connection structure of the pole, the ground column and the base;

Fig. 7 is a schematic diagram of the present invention when it is arranged symmetrically across two sides of the line.

Reference signs:

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

Detailed ways

The technical solutions of the embodiments of the present invention will be explained and described below in conjunction with the accompanying drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the examples in the implementation manners, other examples obtained by those skilled in the art without making creative efforts all belong to the protection scope of the present invention.

As shown in Figures 1 and 2, a protection device for live crossing lines includes a pole 1 that is fixed upright on the ground. Mainly provide support). The pole 1 includes a lower vertical rod 9 , an upper vertical rod 5 and at least one middle vertical rod 6 between the lower vertical rod 9 and the upper vertical rod 5 . The height of the device can be adjusted according to the height of the crossed line. The middle pole 6 is mainly used. Generally, the height of the lower pole is 8 meters, the height of the upper pole is 8 meters, and the height of a single middle pole is 6 meters. It is actually necessary to determine the number of mid-section poles.

The pole 1 is evenly distributed with some stay wires along the circumferential direction, and the stay wires are connected to the ground anchor 13 and tighten the pole. Specifically in this embodiment, the pull wires include an upper pull wire 17 connected to the upper pole 5 and arranged in a uniform circumference, and a pull wire 16 connected to the middle vertical rod 6 and arranged in a uniform circumference. The pull wire 16 is connected to the ground through the double hook 15. Anchor 13 links to each other, and pull-up wire 17 links to each other with ground anchor by lever block 14. The safe positioning of the whole device is realized by the pull wire.

The lower pole 9 is provided with a linear guide rail 7, which is provided with a slide block 8 that can slide up and down along the linear guide rail, and the slide block 8 is connected with a stay cord 18 and a pull cord, and the stay cord is connected to the rocker The front side of the arm is connected, and the traction rope is connected with the traction device.

Welding working limit 19 and non-working limit 20 on the upper pole 5 are to realize the limitation of the working state and non-working state position of rocker arm 3 . Work limit 19 prevents rocking arm from being in a singular position, and work limit 18 and limit rope 4 prevent rocking arm rotation angle from being too large, affecting the line being crossed.

There is a ring groove on the upper pole to realize the positioning of the clamp. There is a ring groove every 3 meters with corresponding working limit 19, non-working limit 20 and limit rope 4 to realize the limit of the rocker arm. bit. Both the working limit 19 and the non-working limit 20 are tightly held in the ring groove by a clamp (such as a hoop).

As shown in FIG. 3 , the lower vertical rod 9 , the middle vertical rod 6 and the upper vertical rod 5 are assembled together by first threaded fasteners 22 .

As shown in Fig. 2, Fig. 4 and Fig. 5, the front portion of the rocking arm 3 is provided with a protective net 21, and the upper section vertical rod 5 is provided with a tightly fixed clamp 24, and the clamp 24 passes through the second screw thread. Fastener 25 is tightly fixed, and bearing 23 is arranged between described clamping clamp 24 and rocking arm 3, and clamping clamp is provided with rotating shaft, and bearing is installed on rocking arm 3, and rotating shaft is supported on bearing 23, so that clamping A rotary pair is formed between the clamp 24 and the rocker arm 3 .

As shown in FIG. 6 , a ground column 27 is provided on the ground, and the lower vertical rod 9 is connected to the ground column 27 through a pin 26 . Moreover, the bottom of the lower vertical pole and the ground column are both arranged in the base 10 , and the base 10 is fixed on the ground by ground nails 28 .

As shown in Figure 7, the device is symmetrically arranged on both sides of the crossed line, the position is determined by the width of the crossed line, and the working length of the rocker arm is also determined by this width. When working, the rocker arm rotates to a plane perpendicular to the pole to realize docking, thus protecting the crossed line.

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 backwards, and the protection net 21 of the rocker arm 3 is in the process of erecting the pole. It will cross the live line being crossed.

The traction device includes a traction motor 12 and a pulley block 11. During work, the traction motor 12 rolls the traction rope, pulls the slider 8 to move down along the linear slide rail 7, and drives the stay rope 18, thereby pulling the rocking arm 3 to rotate to the working position, namely The horizontal position realizes the protection of the circuit being crossed.

Since the rocker arm itself can be hung with a protective net, and at the same time, the working principle of the crank slider is used to realize the rotation of the rocker arm when the slider moves in a straight line, and rotate to a plane perpendicular to the pole to realize the protection of the line. Thereby increasing the scope of protection.

On the ground, as shown in FIGS. 4 and 5 , the assembly of the rocker arm 3 and the clamp 24 can be realized, mainly the assembly of the bearing 23 to ensure that the rocker arm 3 can form a rotation pair with the clamp 24 . And carry out hanging protection net 21 on the ground.

Before carrying out construction, with reference to the height of the line being crossed and a certain safety height, calculate the used quantity of the vertical pole 6 in the middle section. Consider the self-weight of the rocker arm and the impulse force exerted by the line falling onto the safety net, calculate the specifications of the stay rope 18 and the limit rope 4 according to the empirical formula, and calculate the required counterweight 2 according to the weight of the rocker arm with the net and the weight of the net. weight for balance. Calculate the traction force of the corresponding stay rope 18 according to the traction force required for the rocking arm 3 to rotate, thereby select the corresponding traction motor 12 and traction rope and select the pulley block 11 for use.

After all parts are selected, realize the assembly of this device according to Fig. 1. First, the lower vertical rod 9 and the ground post 27 are connected by a pin 26 to form a rotary pair, and then the base 10 is fixed on the ground by ground nails 28 . The linear slide rail 7 is welded on the lower pole 9, and the upper slide block 8 on the linear slide rail 7 realizes linear motion. The lower pole 9 can be fixed with a plurality of middle poles 6 by threaded fasteners.

Next, carry out the assembling of upper pole 5 and related parts. The ring groove on the upper pole 5 can be positioned to hold the clamp 24, so as to realize the assembly of the rocker arm 3 and the upper pole 5. After the assembly is completed, the counterweight 2 and the limit rope 4 can be welded. The upper pole 5 also needs to weld the working limit 19 and the non-working limit 20 around the ring groove.

After the upper pole 5 is assembled, the upper pole and the middle pole are assembled by threaded fasteners.

After the assembly of the whole pole 1 is completed, the upright process of the pole 1 is realized under the action of the stay rope 18. At this time, due to the effect of the counterweight 2, the whole rocker arm 3 is in an upright state, that is, a non-working state. After standing upright, it can be assisted in positioning by the base 10, and is connected with the ground anchor 13 under the action of the upper pull wire 17 and the pull wire 16 arranged in a uniform circumference, the lever block 14 and the double hook 15, and realizes safe positioning under the effect of pulling force.

During work, the traction motor 12 rolls the traction rope, pulls the slider 8 to move down the slider, and drives the stay rope 18, thereby pulling the rocking arm 3 to rotate to the working position, that is, the horizontal position, so as to protect the circuit being crossed.

After the stringing 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, and then the holding pole 1 is brought down to disassemble each part.

According to the implementation rules of the device, recycling can be realized, and the assembly, disassembly and transportation are convenient.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the accompanying drawings and the description in the above specific embodiments content. Any modifications that do not depart from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims (6)

1. A protective device for live crossing lines, which is symmetrically arranged on both sides of the crossed line, and is characterized in that: it includes a holding pole fixed upright on the ground, and the holding pole includes a lower vertical pole, an upper vertical pole, and a lower vertical pole and At least one mid-section vertical rod between the upper vertical rods, the lower vertical rod, the middle vertical rod and the upper vertical rod are assembled together by threaded fasteners, and several pull wires are evenly distributed along the circumferential direction of the vertical rods. The ground anchors are connected and the pole is tightened. The top of the upper pole is hinged with a rocker arm. The front part of the rocker arm is provided with a protective net. The rod is provided with a linear guide rail, and the linear guide rail is provided with a slider that can slide up and down along the linear guide rail. The slider is connected with a pull rope and a pull rope, and the pull rope is connected with the front side of the rocker arm. The traction rope is connected with the traction device; in the non-working state, under the action of the counterweight, the rocker arm rotates backward. The rope pulls the rocker arm downward, so that the rocker arm rotates forward to a horizontal position, so that the rocker arms on both sides of the crossed line are docked, and the protective net cover set on the rocker arm is set above the crossed line; the traction device includes a traction motor 1. Pulley block, the traction motor rolls the traction rope and passes over the pulley block to drive the slider to move down along the linear guide rail. 2. A protection device for live crossing lines according to claim 1, characterized in that: the upper pole is welded with a working limit and a non-working limit to respectively realize the working state and the non-working state position of the rocker arm limit. 3. A protection device for live crossing lines according to claim 1, characterized in that: the upper pole is provided with a clamp for clamping and fixing, and a bearing is provided between the clamp and the rocker arm In order to form a rotary joint between the clamp and the rocker arm. 4. A protection device for live crossing lines according to claim 1, characterized in that: the stay wires include upper stay wires connected to the upper vertical rod and arranged in a uniform circumference, connected to the middle vertical rod and arranged in a uniform circumference Arranged pull-down wire, the pull-down wire is connected to the ground anchor through a double hook, and the upper pull wire is connected to the ground anchor through a lever block. 5. A protection device for live crossing lines according to claim 1, characterized in that: a ground post is provided on the ground, and the lower vertical pole is connected to the ground post through a pin. 6 . The protective device for live crossing lines according to claim 5 , wherein the bottom of the lower pole and the ground column are both arranged in the base, and the base is fixed on the ground by ground nails. 7 .