CN201312079Y - Clamping apparatus for live line replacement of suspended insulator in middle of 500KV untypical tangent tower via splicing method - Google Patents

Abstract

The utility model discloses a fixture for live replacement of a hanging insulator in the middle of a 500KV atypical straight tower by using a plug-in method, which belongs to an electrician's tool. It consists of jig A and jig B matched with jig A. Jig A includes a base, and the jig head is vertically installed on the base. screw; fixture B base is U-shaped, and the bottom of the base is provided with a screw hole. The beneficial effects of the utility model are: simple structure, easy to use, realize double suspension points to carry out live work to replace the hanging insulator in the middle of the 500KV atypical straight line tower, mutual protection, ground potential electrical work is convenient, and no need to reinforce the iron tower cross arm.

Description

Fixture for live replacement of hanging insulators in the middle of 500KV atypical straight-line towers by plug-in method

technical field

The utility model relates to an electrician's tool, in particular to a fixture for live replacement of a hanging insulator in the middle of a 500KV atypical straight tower by a plug-in method. It is especially suitable for live replacement of the suspension insulator in the middle of the atypical straight tower of the 500KV high-voltage transmission line.

Background technique

With the rapid development of power grid construction, tower types in high-voltage transmission lines emerge in endlessly. In the design of the line, factors such as the geographical conditions, meteorological conditions, and structural characteristics of the tower are considered comprehensively, and sometimes it is often impossible to use an atypical tower type. The adoption of atypical tower type has brought certain difficulties to maintenance work.

The wire single-string insulator string of the high-voltage transmission line is suspended on the transmission line tower. The insulator string is composed of multiple disc insulators connected in series at the head (ball end) and tail (steel cap with ball socket). The insulator string has high electrical and mechanical strength, which ensures the reliable operation of the transmission line. During operation, due to lightning strikes, pollution flashover, deterioration and other reasons, it needs to be replaced at any time; at the same time, due to changes in the environment, the creepage distance of insulator strings cannot meet the requirements and needs to be replaced. In order not to cut off the line power due to the replacement of insulators, it is necessary to carry out live work on the high-voltage transmission line. The workers directly contact the high-voltage wires or use insulating tools to perform operations. To replace the deteriorated insulators, an intermediate insulation must be used. The special jig with tightening device transfers the wire pulling force to the lifting tool, so that the insulator string changes from a tensioned state (the insulator string is in a tight state due to the weight of several tons of suspended wires) to a loose state. Since the distribution of the tower material on the cross arm of the atypical straight tower is different from that of the typical straight tower, the lifting tools on the cross arm cannot take root, so the lifting cannot be completed.

Contents of the invention

The utility model provides a fixture for live replacement of the hanging insulator in the middle of a 500KV atypical straight tower by using a new type of fixture to make the lifting tool take root on the cross arm, and realize double lifting points to carry out live work to replace the middle of a 500KV atypical straight tower Suspended insulators.

The utility model is realized by the following technical scheme: a fixture for live replacement of the hanging insulator in the middle of a 500KV atypical straight tower by plug-in method, which is characterized by a fixture A and a fixture B matched with the fixture A, and the fixture Fixture A includes a base, a chuck, and the chuck is vertically installed on the base. There are screw mounting holes on the base and a screw that protrudes to one side is fixed; the base of fixture B is U-shaped, and the bottom of the base is set. There is a screw hole matched with the screw on clamp A.

The beneficial effects of the utility model are: simple structure, easy to use, realize double suspension points to carry out live work to replace the hanging insulator in the middle of the 500KV atypical straight line tower, mutual protection, ground potential electrical work is convenient, and no need to reinforce the iron tower cross arm.

Description of drawings

Fig. 1 is a schematic diagram of the structure of fixture A;

The top view of Fig. 2 fixture A;

Fig. 3 is a schematic diagram of the structure of fixture B;

Fig. 4 is the top view of jig B;

Fig. 5 is the overall layout of tools for live replacement of 500KV atypical straight tower mid-hanging insulators by plug-in method.

In the figure: 1, fixture, 1-1, base, 1-2, chuck, 1-3, screw, 1-4, screw mounting hole, 1-5, substrate, 1-6, screw hole, 2. Lead screw, 3. Cross arm, 4. Insulation rod, 5. Insulation ladder, 6. Four-wire device, 7. Cable.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1 and Figure 2, the jig for live replacement of the suspended insulator in the middle of a 500KV atypical straight tower by the plug-in method is composed of jig A and jig B matched with jig A, jig A includes a base 1- 1. The chuck 1-2, the screw 1-3, the chuck 1-2 is vertically installed on the base 1-1, there is a screw mounting hole 1-4 on the base, and the screw 1-3 protrudes to one side And be fixed on the base 1-1.

As shown in Fig. 3 and Fig. 4, the base body 1-5 of fixture B is U-shaped, and the bottom of the base body is provided with a screw hole 1-6 matched with the screw rod on fixture A.

As shown in Figure 5, the specific operation method is as follows: first, the operator on the tower clamps the chuck head 1-2 in the clamp A of the clamp 1 on the upper seam of the angle steel of the cross arm, and the screw rod 1 in the clamp A -3 Pass through the reserved working hole on the cross arm and the screw hole 1-6 in fixture B, and tighten it with a nut. Install the lead screw 2 at the lead screw mounting holes 1-4 in the jig A; then connect the hoisted insulating pull rod 4 and the four-wire device 6 through screws. The equipotential electrician enters the electric field along the insulating ladder 5, and the equipotential electrician installs the four-wire device 4, so that each single strand of the four-split wire enters the hook of the corresponding four-wire device 4. The ground potential electrician starts to lift the lead screw 2, and stops after lifting to a certain extent, so that the hanging point at the lower end of the insulator string is loosened.

The steps to replace the insulator are as follows:

1) The equipotential electrician enters the electric field: lift the insulating soft ladder, and the equipotential workers carry out the electric field along the soft ladder. Lift the insulating ladder so that one end of the insulating ladder is fixed on the cross arm, and the other end is tied to the tower leg after being tightened by the insulating rope. The equipotential workers slowly enter the strong electric field along the insulating ladder.

2) Lifting wire: the ground potential electrician lifts through the lead screw, and the ground potential electrician installs the clamp on the cross arm and connects it with the lifting tool (the lifting tool is the lead screw, insulating pull rod, and four-wire device); With the cooperation of the equipotential electrician, after confirming that the wire enters the hook of the four-wire device, start to tighten the wire with the lead screw to loosen the porcelain bottle string.

3) Remove the screws: the equipotential electrician pulls out the screws under the porcelain bottle string, so that the porcelain bottle string is separated from the wire.

4) Screw removal: The ground potential electrician binds the insulation transmission rope between the first insulator and the second insulator of the insulator string, and the ground personnel pull the insulation transmission rope through the twisting mill to loosen the screws at the hanging point of the insulator and the cross arm . The ground potential electrician removes the screws at the hanging points of the cross-arm.

5) Falling porcelain bottle strings: Ground personnel slowly loosen insulator strings through motorized winching.

6) Insert the insulating board: When the degraded insulator in the insulator string of the equipotential electrician is about to reach the wire, quickly insert the insulating board at the insulator under the degraded insulator, and the board rests on the wire.

7) Replacement of deteriorated insulators: The equipotential electrician loosens the connection between the deteriorated insulators and the entire string, removes the deteriorated insulators, replaces them with new insulators and restores the connection of the entire string of insulators.

8) Restore the connection between the insulator string and the cross-arm: the ground personnel grind the insulator string up to the cross-arm through motorized winching, and the ground potential electrician restores the bolt connection between the insulator string and the cross-arm.

9) Restore the connection between the insulator string and the wire: the equipotential electrician connects the bolt between the lower end of the insulator string and the connecting plate.

10) End the job.

Claims (1)

1, the jig of suspension insulator in the middle of a kind of poling board method charged for replacement 500KV atypia tangent tower is characterized in that being made up of jig A and the jig B that matches with jig A; Jig A comprises pedestal (1-1) and dop (1-2), and dop (1-2) is vertically mounted on above the pedestal (1-1), and screw mandrel installing hole (1-4) is arranged on pedestal (1-1), the screw rod (1-3) that also has and be fixed on that pedestal (1-1) is gone up and stretch out to a side; Jig B matrix (1-5) is a U-shaped, and the bottom of matrix (1-5) is provided with the screw hole (1-6) that matches with screw rod (1-3) on the jig A.

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