CN107425475B - Overhead ground wire lifter and lifting in-place method thereof - Google Patents

Abstract

The invention relates to the technical field of maintenance of overhead power transmission lines, in particular to an overhead ground wire lifter and a lifting and positioning method thereof. The overhead ground wire lifting device is composed of an electric winch and a tripod, and provides an overhead ground wire lifting device and its lifting method. The lifting point of the winch for lifting the overhead ground wire is too low, the lifting is difficult, and the overhead ground wire The problem of the heavy weight of the wire lifter and the inconvenience of lifting in place, improving the structure of the winch, optimizing the lifting method, solving the current problem of difficult lifting and maintenance of the overhead ground wire, improving the convenience of operation on the tower, reducing labor intensity, and improving the safety of the overhead ground wire Maintenance efficiency.

Description

An overhead ground wire lifter and its lifting and positioning method

technical field

The invention relates to the technical field of maintenance of overhead power transmission lines, in particular to an overhead ground wire lifter and a lifting and positioning method thereof.

Background technique

An overhead ground wire is a device that protects overhead transmission lines from lightning strikes. In order to improve the safety of line operation, overhead ground wires are generally erected above the protected wires. When a thundercloud discharges to the ground above the line, the lightning channel is likely to hit the overhead ground wire first, so that the lightning current enters the ground to protect the normal power transmission of the wire. At the same time, the overhead ground wire also has the function of electromagnetic shielding. When the thundercloud near the line discharges to the ground, it can reduce the lightning-induced overvoltage caused on the wire. Therefore, the overhead ground wire must be firmly connected with the grounding device of the tower to ensure that the lightning current can be reliably guided into the ground after being struck by lightning. Important transmission lines generally use two overhead ground wires to place all the protected conductors within its protection range.

Since the overhead ground wire does not bear the function of carrying current, it is mostly composed of steel strands. There are also some transmission lines that use good conductor ground wires, that is, overhead ground wires made of aluminum alloy or aluminum-clad steel wires. This kind of ground wire has better conductivity, which can improve the power transmission performance of the line and reduce the interference to adjacent communication lines.

Defects in the overhead ground wires of transmission lines occur from time to time. When the overhead ground wires are broken and need to be replaced or the ground wire clamps are regularly inspected, the construction personnel need to lift the overhead ground wires, loosen the ground wire clamps, and perform replacement or inspection operations. Due to the limitation of the tower structure, the winch for hoisting the overhead ground wire has no suitable hanging point, and there is a common problem that the lifting point is too low and the lifting is difficult.

The Chinese patent number "2014103248189" discloses a "overhead ground wire lifter". In the scheme, a bobbin is arranged on the winch reel, and a bobbin wrench is connected to the bobbin. The rope is wound on the bobbin, and the leading end of the rope is connected to the wire lifting hook , One end of the telescopic connecting rod is movably connected to the winch reel, and the other end of the telescopic connecting rod is connected to the deck, and the deck is provided with an adjustment mechanism. The winch is a regular polygon. The spool is square. The winch reel and the telescopic connecting rod are flexibly connected by bolts and nuts. The card seat is a right angle U shape. The adjustment mechanism is as follows: gasket I and gasket II are symmetrically arranged on the inner surface of the deck, and gasket I is connected to the adjustment screw. This solution aims to solve the problems of low efficiency and potential safety hazards in manual thread lifting.

When the overhead ground wire lifter is working, it needs to be lifted more than ten meters high by the staff on the tower with an insulating rope, and then installed on the overhead ground wire support. There is a risk of accidental detachment.

Contents of the invention

The object of the present invention is to provide a wire lifter for overhead ground wire and its lifting method. The hoisting point of the winch for lifting the overhead ground wire is too low, which makes lifting difficult, and the weight of the wire lifter for overhead ground wire is relatively large, so it can be lifted into place. To solve the problem of inconvenience, improve the structure of the winch, optimize the lifting method, solve the current difficult problem of hoisting and maintenance of overhead ground wires, improve the convenience of operation on the tower, reduce labor intensity, and improve the maintenance efficiency of overhead ground wires.

In order to achieve the above object, the technical solution of the present invention is as follows:

A lifting and positioning method for an overhead ground wire lifter, using the self-power of the lifting belt and the overhead ground wire lifter, so that the overhead ground wire lifter is automatically lifted along the lifting belt to the ground wire support, and finally lifted by the tower The operator turns over and fixes the overhead ground wire lifter to the ground wire support. The specific operation steps are as follows:

1) Disconnect the overhead wire of the circuit, and the operator on the tower climbs on the ground wire support with one end of the lifting belt;

2) The two ends of the lifting belt are bifurcated structures, and the operator on the tower firmly connects the two belt heads at one end of the lifting belt to the bolts on both sides of the angle steel of the ground wire support;

3) Move the overhead ground wire lifter to the ground below the overhead ground wire support, pass the other end of the lifting belt through the notch on the foot of the overhead ground wire lifter and fix it to the overhead ground wire On the sheave of the electric winch of the wire lifter, the lifting belt is wrapped around the outer side of the wire rope and the hook on the sheave;

4) Turn on the DC motor on the overhead ground wire lifter, and as the hoisting belt is continuously wound onto the sheave, the overhead ground wire hoist continues to rise along the hoisting belt and slowly approaches the overhead ground wire support;

5) When the overhead ground wire lifter rises below the end of the overhead ground wire support, the DC motor stops;

6) The operator on the tower holds the electric winch, flips the electric winch up and drags it until the notch is introduced from the end of the angle steel of the ground wire support;

7) Tighten the nuts on connecting rod 1 and connecting rod 2 until the tripod and the overhead ground wire bracket are firmly connected together;

8) Reversely rotate the DC motor, untie one end of the hoisting belt from the sheave, and then operate the hook on the sheave for maintenance work;

9) After the maintenance work of the overhead ground wire is completed, fix the other end of the lifting belt to the sheave again, and turn on the DC motor to wind the lifting belt around the sheave;

10) Loosen the nuts on the first connecting rod and the second connecting rod, push the electric winch to the end of the overhead ground wire support until the electric winch is separated from the overhead ground wire support, and hang on the lifting belt;

11) Reversely rotate the DC motor, and the electric winch slowly falls to the ground;

12) The operator on the tower removes one end of the lifting belt and throws it down;

13) The job ends.

The electric winch includes a winch seat, a rope wheel, a steel wire rope, a hook, a shaft one and a DC motor, the shaft one is placed in the inner hole of the rope wheel, and the two ends of the shaft one are respectively connected with the winch seat, and its characteristics One side of the rope wheel is connected to the worm wheel, and the worm meshed with the worm wheel is arranged on the second shaft, one end of the second shaft is connected to the bevel gear one, and the bevel gear two meshing with the bevel gear one is located on the third shaft, so One end of the shaft three is provided with a DC motor.

The tripod includes an upper bearing seat, a leg one, a second leg, an end plate one, an end plate two, a connecting rod one and a connecting rod two, and the upper bearing seat is connected to the ends of the first leg and the second leg on the same side. The end plate 1 is connected to the other end of the leg 1, the end plate 2 is connected to the other end of the leg 2, and the two ends of the connecting rod 1 are respectively connected to the end plate 1 and the end plate 2 by bolts. , the two ends of the connecting rod two are respectively connected to the end plate one and the end plate two through bolts and nuts, and the legs one and two are surrounded by the connecting rod one and the connecting rod two to form a shape matching with the angle steel of the overhead ground wire support. notch.

The first leg and the second leg are 90° buckling structures made of square steel pipes, and support rods are provided at the 90° buckling positions.

After the notch is connected with the angle steel of the overhead ground wire support, the center of the sheave is 350-550mm higher than the bottom edge H of the notch.

Compared with prior art, the beneficial effect of the present invention is:

1) Aiming at the problem of heavy self-weight of the electric winch and inconvenient lifting and positioning, by optimizing the lifting method, the problem of difficult lifting and maintenance of the overhead ground wire is solved, and the convenience of operation on the tower is improved.

2) The worm gear reduction mechanism is adopted, with simple structure, compact layout and stable performance, which can fully meet the requirements of the wire lifting operation of the overhead ground wire, and is easy to operate and saves time and effort.

3) With the help of the overhead ground wire bracket as the hanging point, the height of the hoisting point is effectively increased, so that one operator on the tower can complete the hoisting work of the overhead ground wire, which reduces labor intensity and improves the safety factor and efficiency of the operation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural schematic diagram of the embodiment of overhead ground wire lifter of the present invention;

Fig. 2 is the A direction view of Fig. 1;

Fig. 3 is a schematic diagram of the structure of the overhead ground wire clamp;

Fig. 4 is a schematic diagram of the automatic lifting and in-position state of an embodiment of the overhead ground wire lifter of the present invention;

Fig. 5 is a schematic diagram of the end structure of the lifting belt embodiment of the present invention.

In the figure: 1-winch seat, 2-rope wheel, 3-wire rope, 4-hook, 5-axis one, 6-overhead ground wire, 7-worm gear, 8-worm, 9-axis two, 10-bevel gear 1, 11-bevel tooth 2, 12-axis 3, 13-footstand, 14-upper seat, 15-bolt, 16-nut, 17-notch, 18-reinforced connector, 19-support rod, 20- Overhead ground wire bracket angle steel, 21-DC motor, 22-battery box, 23-control box, 24-remote controller, 25-overhead ground wire clamp, 26-lift belt, 27-overhead ground wire lifter.

Detailed ways

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

See Figure 1, which is a structural schematic diagram of an embodiment of the overhead ground wire lifter of the present invention. The overhead ground wire lifter is composed of an electric winch and a tripod. The electric winch structure includes a winch seat 1, a rope wheel 2, a steel wire Hook 4, shaft one 5 and DC motor 21, shaft one 5 is placed in the inner hole of rope wheel 2, the two ends of shaft one 5 are connected with capstan seat 1 respectively, one side of rope wheel 2 is connected with worm wheel 7, and worm wheel The meshing worm 8 is arranged on the shaft 2 9, one end of the shaft 2 is connected to the bevel gear 1 10, the bevel gear 2 11 meshing with the bevel gear 1 is located on the shaft 3 12, and one end of the shaft 3 is provided with a DC motor 21;

The bottom of the winch seat 1 is connected to the tripod 13, and the tripod includes an upper bearing seat 14, a leg one 131, a leg two 132, an end plate one 141, an end plate two 142, a connecting rod one 151 and a connecting rod two 152, and the upper bearing seat 14 connects At the end of the same side of the first leg 131 and the second leg 132, the first end plate 141 is connected to the other end of the first leg 131, the second end plate 142 is connected to the other end of the second leg 132, and the first connecting rod 151 The two ends of connecting rod 141 and end plate 142 are respectively connected by bolt 15 and nut 16, and the two ends of connecting rod 152 are respectively connected by bolt 15 and nut 16 to end plate 141 and end plate 2 142, leg one 131, Between the second leg 132 and the first connecting rod 151 and the second connecting rod 152, a notch 17 matching the shape of the overhead ground wire support angle steel is formed.

A reinforcing connector 18 is provided between the first leg 131 and the second leg 132 . The first leg 131 and the second leg 132 are both 90° buckling structures made of square steel pipes, and the 90° buckling parts are connected to the support rod 19 in a welded form. Reinforcing the connecting body 18 and the supporting rod 19 can improve the structural strength and rigidity of the first leg 131 and the second leg 132 to ensure that the first leg 131 and the second leg 132 are not deformed when stressed.

The DC motor 21 is powered by a lithium battery, and the battery box 22 is located on the back side of the upper seat 14 of the tripod. The DC motor is equipped with a control box 23, which is provided with up, down, and stop buttons. The control box is provided with a GSM/GPRS wireless communication module. The wireless communication module communicates with the remote controller 24. The remote controller 24 can be controlled by ground personnel operate.

See Fig. 2 and Fig. 3, when using the overhead ground wire lifter, after the notch 17 is connected with the overhead ground wire support angle steel 20, the center of the sheave 2 is 350-550mm higher than the bottom edge H of the notch. The notch 17 can be translated along the overhead ground wire bracket angle steel 20 until the hook is positioned above the overhead ground wire clamp 25, and then the overhead ground wire 6 can be hooked and carried out the wire lifting operation.

See Fig. 4, the hoisting and positioning method of the overhead ground wire lifter of the present invention is to use the self-power of the lifting belt 26 and the overhead ground wire lifter 27 to automatically lift the overhead ground wire lifter to the ground wire support along the lifting belt 20, and finally the operator on the tower turns it into place to fix the overhead ground wire lifter to the ground wire support, and then the wire lifting operation can be started. The specific operation steps are as follows:

1) Disconnect the overhead wire of the circuit, and the operator on the tower climbs on the ground wire support with one end of the lifting belt;

2) As shown in Figure 5, the two ends of the lifting belt are bifurcated structures, and the operators on the tower respectively firmly connect the two belt heads at one end of the lifting belt 26 to the bolts on both sides of the ground wire bracket angle steel 20;

3) Move the overhead ground wire lifter 27 to the bottom of the overhead ground wire bracket, pass the other end of the lifting belt through the notch on the tripod and fix it to the rope wheel of the electric winch, and lock the other end of the lifting belt with a bolt. At this time, the lifting belt is wrapped around the outer side of the steel wire rope and the hook on the sheave;

4) Turn on the DC motor on the overhead ground wire lifter, and the overhead ground wire lifter 27 continues to rise along the lifting belt as the hoisting belt is continuously wound onto the sheave, slowly approaching the overhead ground wire support;

5) When the overhead ground wire lifter rises below the end of the overhead ground wire support, the DC motor stops;

6) The operator on the tower holds the overhead ground wire lifter, flips the overhead ground wire lifter up and drags it until the notch on the tripod is introduced from the angle steel end of the ground wire support;

7) Tighten the nuts on connecting rod 1 and connecting rod 2 until the tripod and the overhead ground wire bracket are firmly connected together;

8) Reversely rotate the DC motor, untie one end of the hoisting belt from the sheave, and then control the hook on the sheave to start the wire lifting operation for maintenance work;

9) After the maintenance work of the overhead ground wire is completed, fix the other end of the lifting belt to the sheave again, and turn on the DC motor to wind the lifting belt around the sheave;

10) Loosen the nuts on connecting rod 1 and connecting rod 2, push the overhead ground wire lifter 27 to the end of the overhead ground wire support until the overhead ground wire lifter is separated from the overhead ground bring;

11) Reversely rotate the DC motor, and the overhead ground wire lifter slowly falls to the ground;

12) The operator on the tower removes one end of the lifting belt and throws it down;

13) The job ends.

The above embodiments are only specific examples selected for the purpose of the present invention, technical solutions and beneficial effects in detail, but should not limit the protection scope of the present invention. Various modifications, equivalent replacements and improvements shall fall within the protection scope of the present invention.

Claims (4)

1. The lifting and positioning method of the overhead ground wire lifter is characterized in that the self power of a lifting belt and the overhead ground wire lifter is utilized to automatically lift the overhead ground wire lifter onto a ground wire bracket along the lifting belt, and finally, an operator on a tower turns over to position the overhead ground wire lifter to fix the overhead ground wire lifter onto the ground wire bracket, and the method comprises the following specific operation steps: the overhead ground wire lifter comprises an electric winch and a foot rest, the electric winch comprises a winch base, a rope pulley, a steel wire rope, a lifting hook, a first shaft and a direct current motor, the first shaft is arranged in an inner hole of the rope pulley, two ends of the first shaft are respectively connected with the winch base, one side of the rope pulley is connected with a worm wheel, a worm meshed with the worm wheel is arranged on a second shaft, one end of the second shaft is connected with a first bevel gear, a second bevel gear meshed with the first bevel gear is arranged on a third shaft, and one end of the third shaft is provided with the direct current motor;

1) The loop overhead conductor is broken, and an operator on the tower with one end of the lifting belt climbs the ground wire bracket;

2) Two ends of the lifting belt are of a bifurcation structure, and operators on the tower respectively and firmly connect two belt heads at one end of the lifting belt to bolts at two sides of the angle steel of the ground wire bracket;

3) Moving the overhead ground wire lifter to the ground below the overhead ground wire bracket, and fixing the other end of a lifting belt to a rope wheel of an electric winch of the overhead ground wire lifter by penetrating a notch on a foot stool of the overhead ground wire lifter so that the lifting belt is wound on the outer sides of a steel wire rope and a lifting hook on the rope wheel;

4) Starting a direct current motor on the overhead ground wire lifter, and continuously lifting the overhead ground wire lifter along the lifting belt along with the continuous winding of the lifting belt on the rope pulley to slowly approach the overhead ground wire support;

5) When the overhead ground wire lifter rises to the position below the end of the overhead ground wire bracket, the direct current motor stops;

6) An operator on the tower holds the electric winch and turns the electric winch upwards to drag the electric winch until the notch is led in from the end of the angle iron of the ground wire bracket;

7) Nuts on the first connecting rod and the second connecting rod are fastened until the foot rest is fixedly connected with the overhead ground wire support;

8) Rotating the direct current motor reversely, and detaching one end of the lifting belt from the rope pulley, so that a lifting hook on the rope pulley can be operated to carry out maintenance operation;

9) After the overhead ground wire maintenance work is finished, fixing the other end of the lifting belt to the rope pulley again, and starting the direct current motor to wind the lifting belt on the rope pulley;

10 Loosening nuts on the first connecting rod and the second connecting rod, pushing the electric winch to the end of the overhead ground wire support until the electric winch is separated from the overhead ground wire support and is suspended on a lifting belt;

11 The electric capstan slowly falls to the ground;

12 Operator on the tower removes one end of the lifting belt and throws it down;

13 The operation ends.

2. The method for lifting the overhead ground wire lifter in place according to claim 1, wherein the foot rest comprises an upper bearing seat, a first leg, a second leg, a first end plate, a second end plate, a first connecting rod and a second connecting rod, the upper bearing seat is connected to the ends of the first leg and the second leg on the same side, the first end plate is connected to the end of the first leg on the other side, the second end plate is connected to the end of the second leg on the other side, two ends of the first connecting rod are respectively connected with the first end plate and the second end plate through bolts and nuts, two ends of the second connecting rod are respectively connected with the first end plate and the second end plate through bolts and nuts, and notches matched with the shape of the angle steel of the overhead ground wire support are formed among the first leg, the second leg, the first connecting rod and the second connecting rod.

3. The method for lifting and positioning the overhead ground wire lifter according to claim 2, wherein the first leg and the second leg are both of a 90-degree buckling structure made of square steel tubes, and a support rod is arranged at the 90-degree buckling position.

4. The method for lifting the overhead ground wire lifter into position as claimed in claim 1, wherein after the notch is connected with the overhead ground wire bracket angle steel, the height of the center of the rope pulley above the bottom edge H of the notch is 350-550 mm.

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