CN101834416B - Device and construction method for live repairing of strand-broken overhead earth wire of transmission line - Google Patents

Abstract

The invention discloses a device for live repairing a broken strand overhead ground wire of a transmission line and a method for live repairing a broken strand overhead ground wire of a transmission line using the device. The device includes a line clamp for clamping a broken strand overhead ground wire . The installation device for manipulating the line card, and the tractor for pulling the line card and the installation device. The tools used in the present invention are simple in appearance and structure, easy to install (disassemble), and do not need workers to climb to the ground Working at the broken strand greatly reduces the labor intensity of the operators and enhances the work safety. Since the device of the invention is not limited by conditions such as pole shape, terrain, ground wire height, and line electrification, it has a wide application range and strong practical promotion significance.

Description

Equipment and construction method for live repairing broken strands of overhead ground wires in transmission lines

Technical field:

The invention relates to equipment and a construction method for live repairing broken-strand overhead ground wires of transmission lines.

Background technique:

During the operation of the overhead ground wire of the transmission line, due to various reasons such as the quality of the ground wire, lightning strikes, and external force damage, strand breakage often occurs. The ground wire after loose strands has brought extremely adverse effects on the safe operation of the line. First, the safe distance between the live wire and the live conductor cannot meet the design requirements for line operation; Caused the transmission line to be forced to shut down.

At present, there are three main methods for dealing with broken strands in overhead ground wires in China: 1. When the line is running with electricity, operators use flying cars or pulleys to enter the broken strands along the ground wires for processing. However, the diameter of the overhead ground wire of the old line of the power system is generally 50 square millimeters, and Article 8.3.8.1 of the "Electricity Safety Work Regulations" clearly stipulates that the minimum cross-section of the ground wire steel strand to withstand personnel climbing operations is 50 square millimeters. Climbing operations are not allowed behind the strands, so this method is not suitable for ground wires of 50 square millimeters and below. 2. Using the insulated straight ladder operation method, the operator goes along the insulated straight ladder to the broken strand for processing, but this method is labor-intensive and subject to too many restrictions, such as terrain, terrain, ground height, weather, etc., making it difficult to carry out bigger. 3. The line is forced to shut down and the ground wire is placed on the ground for processing, which not only causes a power outage of the line, but also poses a great threat to the reliable operation of the power grid.

Invention content:

In order to overcome the defects of the prior art, the object of the present invention is to provide a device and a construction method for live repairing broken-strand overhead ground wires of transmission lines, so as to achieve the purpose of live repairing broken-strand ground wires of transmission lines.

The present invention solves technical problem and adopts following technical scheme:

Equipment for live repairing broken overhead ground wires of transmission lines, including:

A. Ground line card, which has a square frame with a top plate and a bottom plate. The top plate is used as the lower clamp body of the line card, and a plate-shaped upper clamp body is provided. The bottom surface of the upper clamp body is vertically connected with a The screw of the clamp body, the screw rod is covered with a spring, and the bottom end of the screw rod is provided with a nut to form a spring seat; an arc-shaped groove is opened in the corresponding position of the opposite surface of the upper and lower clamp body according to the axial direction of the overhead ground wire;

B. Line card installation device, including a cuboid base and a perforated steel plate fixed on the top of the base and connected to the base in an L shape. A crank perpendicular to the plane of the base is hinged on the side of the base below the perforated steel plate Pull rod, a tension spring is connected between the crank pull rod and the base; a push rod is provided, the bottom of the push rod is hinged on the crank pull rod and can pass through the perforated steel plate;

C, tractor, said tractor includes two semicircular steel pipes arranged side by side, the outer walls of the opposite ends of the two steel pipes are hinged by hinges, and the outer walls of the other ends of the steel pipes away from the hinge point are all provided with pin holes; one of the steel pipes A rectangular steel plate is radially fixedly connected to the outer wall of the steel plate, and a fixing hole and a traction hole are provided on the steel plate.

Utilize the equipment of the present invention to carry out the method for live repairing the broken strand overhead ground wire of transmission line, carry out as follows:

A. The staff finds and determines the broken strand position of the overhead ground wire of the transmission line on the ground, and assembles the tractor, the ground wire clamp and its installation device on the ground first when the line is not powered off;

B. Fix the ground wire clip on the perforated steel plate of the installation device, push the crank pull rod upward, so that it drives the ejector rod to pass through the perforated steel plate and the round hole of the bottom plate and press against the bottom surface of the nut, compressing the spring, Increase the distance between the upper and lower clips of the line card;

C. The staff boards the pole tower to engage the upper and lower clips of the line card on the overhead ground wire, and at the same time connects the tractor to the overhead ground wire, and uses the rope to fix the installation device with the tractor steel plate. Insert an insulating rope through the hole to the ground, and then the ground personnel pull the traction insulating rope to drive the tractor, ground wire clamp and installation device to the broken strand;

D. The ground personnel pull down the crank pull rod through the insulating rope, the crank pull rod drives the ejector rod back, and the spring compressed by the ejector rod on the line card releases the stored energy, and the line card can tightly clamp the broken ground wire. Finally, the ground The personnel pull the insulating rope on the tractor, and pull the tractor, the line card and its installation device back to the pole tower. The staff pulls out the fixed pin of the tractor, opens the semicircular steel pipe, and then the tractor can be taken off.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. The present invention mainly adopts a tractor, a new type of ground wire clamp and its installation device to carry out live work. Therefore, the new method has a relatively simple working procedure and high work efficiency.

2. The tools and tools adopted in the present invention are simple in appearance and structure, easy to install (disassemble), and do not need workers to climb up to the broken strands of the ground wire to work, which greatly reduces the labor intensity of workers and enhances work safety.

3. Since the present invention is not restricted by conditions such as pole shape, topography, ground wire height, and line electrification, the method has a wide application range and has strong practical promotion significance.

Description of drawings:

Fig. 1 is the front view of tractor of the present invention; Fig. 2 is the left side view of Fig. 1 (two semicircular steel pipes are in closed state and locked with pin shaft among the figure); Fig. 3 is the structural representation of ground line clip of the present invention ; FIG. 4 is a front view of the ground line card installation device of the present invention; FIG. 5 is a left view of FIG. 4 .

Symbols in the figure: 1 base, 2 perforated steel plate, 3 crank rod, 4 extension spring, 5 ejector rod, 6 sleeve, 7 hook hole, 8 hook, 9 pulley, 10 bottom plate, 11 frame, 12 lower clip body, 12 ', 13' groove, 13 upper clip, 14 screw, 15 spring, 16 nut, 17 round hole, 18 open slot, 19 fixing pin, 20 rope, 21 insulating rope, 22, 22' semicircular steel pipe, 23 Hinge, 24 bearing pin holes, 25 steel plates, 26 fixing holes, 27 traction holes, 28 bearing pins.

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways:

Embodiment: In combination with Figures 1 and 2, the retractor of this embodiment includes two semicircular steel pipes 22 and 22' arranged side by side, the outer walls of the opposite ends of the two steel pipes are hinged by a hinge 23, and the outer walls of the other end of each steel pipe away from the hinge point All are provided with pin shaft holes 24; the outer wall of one of the steel pipes is radially fixedly connected with a rectangular steel plate 25, and a fixing hole 26 and a traction hole 27 are provided on the steel plate. In the specific implementation, two semicircular steel pipes with an opening diameter of 30 mm and a length of 300 mm are set, one side is fixed with two hinges 23, and a pin hole is welded on the other side respectively, and one of the semicircular steel pipes The outside of the middle part is welded with a rectangular steel plate 25 with a length of 122 millimeters and a width of 82 millimeters; the steel plate side and the bottom have some holes for fixing and traction, and the steel pipe and the steel plate are galvanized materials. The two pin holes provided on the two semicircular steel pipes are misaligned, that is, when the two semicircular steel pipes are combined to form a circular steel pipe, the central axes of the two pin holes are on a straight line so that they can be inserted into the Pin shaft 28 in two pin shaft holes can lock two semicircular steel pipes together.

3, the ground line card of this embodiment is a square frame 11 with a top plate and a bottom plate 10, the top plate is used as the lower clamp body 12 of the line card, and a plate-shaped upper clamp body 13 is provided. The bottom surface of the upper clamp body 13 A screw 14 passing through the lower clamp body 12 is fixed vertically, a spring 15 is connected to the outside of the screw rod, and a nut 16 is arranged at the bottom of the screw rod to form a spring seat; Arc-shaped grooves 13', 12' are formed in the axial direction.

In order to prevent the ground wire from slipping out of the groove during the progress of the line card, at least two fixed pins 19 passing through the end surface of the lower clamp body are fixed on the bottom surface of the upper clamp body, and the connection line between the fixed pins is parallel to Axis of the groove.

As shown in FIG. 3 , a circular hole 17 penetrating through the bottom plate is opened on the bottom plate 10 of the square frame 11 , and the center of the circular hole is on the axis of the screw rod 14 .

Combining Figures 4 and 5, the structure of the installation device for the ground line card in this embodiment includes: a cuboid base 1 and a perforated steel plate 2 fixed to the top of the base and connected to the base in an L shape. The bottom of the perforated steel plate 2 is hinged with a crank rod 3 perpendicular to the base plane, and a tension spring 4 is connected between the crank rod 3 and the base 1; a push rod 5 is arranged, and the bottom of the push rod is hinged on the crank rod 3 , the upper end of the push rod can pass through the hole on the upper end face of the perforated steel plate.

As shown in Fig. 5, a fixed sleeve 6 is arranged between the base 1 and the bottom of the perforated steel plate 2, and the ejector rod 5 passes through the sleeve 6. When the ejector rod is driven by the crank pull rod to move up and down, the sleeve 6 6 can limit the ejector rod 5.

As shown in Figure 4, a hook hole 7 is provided on the upper end of the base 1, and an inverted U-shaped hook 8 is provided. The base 1 is hung on the hook 8 during operation, and the upper end of the hook is provided with a ground that can be hung on the overhead line. Pulley 9 on the line.

In specific implementation, base 1 is made with a rectangular steel plate of 21 centimeters (long) * 6 centimeters (wide) * 1 centimeter (thick), and perforated steel plate 2 is made with a 5 centimeters (long) * 3 centimeters (wide) * 1 centimeter (Thick) rectangular steel plate is formed, and a 1.5 cm (width) × 0.3 cm (thick) groove is ground in the middle of the perforated steel plate, and there is a perforation in the middle of the groove (the size of the perforation is basically the same as the diameter of the ejector rod); Side respectively fixes a 5 centimeter long extension spring 4, and the two ends of extension spring 4 are respectively connected on the base and the crank arm pull rod 5, and a push rod 5 that can move up and down is hinged on the crank pull rod, and the push rod is made from a hollow steel pipe. Pass through in the sleeve 6 that becomes, and sleeve is made of a steel pipe with a diameter of 2.5 centimeters and a length of 3 centimeters; there is a hook hole 7 on both sides of the upper end of the base, and the base is made of a hook made of U-shaped round steel 8 hang and hold, and the hook upper end is provided with pulley 9, and U-shaped round steel is made by 19 centimeters (high) * 0.8 centimeters (diameter).

The method of using the equipment of the present invention and adopting the equipment to carry out the live repair of the broken strand overhead ground wire of the transmission line is carried out according to the following steps:

A. The staff finds and determines the broken strand position of the overhead ground wire of the transmission line on the ground, and assembles the tractor, the ground wire clamp and its installation device on the ground first when the line is not powered off;

B. Fix the ground wire clip on the perforated steel plate (2) of the installation device, push the crank pull rod (3) upwards, so that it drives the ejector rod (5) from the perforated steel plate (2) and the circle of the bottom plate (10) Pass through the hole (17) and press against the bottom surface of the nut (16), compress the spring (15), so that the distance between the upper and lower clips (13, 12) of the line card increases;

C. The staff boards the pole tower and engages the upper and lower clips (13, 12) of the line card on the overhead ground wire, opens the semicircular steel pipes 22, 22' and wraps it around the overhead ground wire, plugs it in and fixes it Lock the pin 28, use the rope (20) to fix the installation device with the tractor steel plate (25), penetrate an insulating rope through the traction hole (27) to the ground, and then pull the traction insulating rope to drive the tractor , ground wire clamp and installation device to the broken strand;

D. The ground personnel pull down the crank rod (3) through the insulating rope (21), the crank rod drives the ejector rod (5) back, and the spring (15) compressed by the ejector rod on the line card is released from the stored energy, and the line card can be tightened Block the broken ground wire, and finally, pull the insulating rope on the retractor by the ground personnel, pull the retractor, line card and its installation device back to the pole tower, and the staff pulls out the fixed pin (28) of the retractor, By opening the semicircular steel pipe, the tractor can be taken off for reuse next time.

Claims (5)

1. The equipment for live repairing broken strands of overhead ground wires of transmission lines, characterized in that the equipment includes: A, ground line card, it comprises the square frame (11) that has top plate and bottom plate (10), described top plate is used as the lower folder body (12) of line card, is provided with a plate-shaped upper folder body (13), so The bottom surface of the upper clip body is vertically fixedly connected with the screw rod (14) passing through the lower clip body, the screw rod is covered with a spring (15), and the bottom end of the screw rod is provided with a nut (16) to form a spring seat; The corresponding positions of the opposing surfaces of the clip bodies (13, 12) are provided with arc-shaped grooves (13', 12') according to the axial direction of the overhead ground wire; the bottom plate (10) of the square frame (11) is provided with a penetrating bottom plate The circular hole (17), the center of circle of described circular hole is on the axis of described screw rod (14); B. Line card installation device, which includes a cuboid base (1) and a perforated steel plate (2) that is fixedly connected to the top of the base and connected to the base in an L shape, and is located at the side of the base on the side of the perforated steel plate (2). A crank rod (3) perpendicular to the plane of the base is hinged below, and a tension spring (4) is connected between the crank rod and the base; a push rod (5) is arranged, and the bottom of the push rod is hinged to the crank rod (3). ) and can pass through the perforated steel plate (2); C, tractor, said tractor comprises two semicircular steel pipes (22, 22 ') arranged side by side, the outer walls of the opposite ends of the two steel pipes are hinged by hinges (23), and the outer walls of the other end of each steel pipe away from the hinge point are all set Pin shaft holes (24) are arranged; a rectangular steel plate (25) is radially fixedly connected to the outer wall of one of the steel pipes, and a fixing hole and a traction hole are provided on the steel plate. 2. The equipment for live repairing broken strands of transmission line overhead ground wire according to claim 1, characterized in that the bottom surface of the upper clamp body (13) is fixed with at least two holes passing through the end surface of the lower clamp body (12). Fixed pins (19), the connecting line between the fixed pins is parallel to the axes of the grooves (13', 12'). 3. The equipment for live repairing broken strands of transmission line overhead ground wire according to claim 1, characterized in that a sleeve (6) fixedly connected to the base (1) is arranged under the perforated steel plate (2), The push rod passes through the sleeve and is limited. 4. The equipment for live repairing broken strands of transmission line overhead ground wire according to claim 1, characterized in that the upper end of the base (1) is provided with a hook hole (7), and an inverted U-shaped hook (8) is provided. ), the base is hung on the hook, and the upper end of the hook is provided with a pulley (9) that can be hung on the overhead line. 5. A method of utilizing the device according to claim 1 to carry out live repair of the broken strand overhead ground wire of the transmission line, which is characterized in that it is carried out as follows: A. The staff finds and determines the broken strand position of the overhead ground wire of the transmission line on the ground, and assembles the tractor, the ground wire clamp and its installation device on the ground first when the line is not powered off; B. Fix the ground wire clip on the perforated steel plate (2) of the installation device, push the crank pull rod (3) upwards, so that it drives the ejector rod (5) from the perforated steel plate (2) and the circle of the bottom plate (10) Pass through the hole (17) and press against the bottom surface of the nut (16), compress the spring (15), so that the distance between the upper and lower clips (13, 12) of the line card increases; C. The staff boards the pole tower and engages the upper and lower clips (13, 12) of the line card on the overhead ground wire, and at the same time connects the tractor to the overhead ground wire, and uses the rope (20) to connect the installation device with the overhead ground wire. The tractor steel plate (25) is fixedly connected, and an insulating rope is passed through the traction hole (27) to the ground, and then the ground personnel pull the traction insulating rope to drive the tractor, the ground wire clamp and the installation device to the broken strand; D. The ground personnel pull down the crank rod (3) through the insulating rope (21), the crank rod drives the ejector rod (5) back, and the spring (15) compressed by the ejector rod on the line card is released from the stored energy, and the line card can be tightened Block the broken ground wire, and finally, pull the insulating rope on the retractor by the ground personnel, pull the retractor, line card and its installation device back to the pole tower, and the staff pulls out the fixed pin (28) of the retractor, The tractor can be taken off by opening the semicircular steel pipe.

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