CN203871745U - Double-hoisting-point rod head fixture for live changing of linear insulator on steel pipe pole of 220kV line - Google Patents

Abstract

The utility model relates to a double-suspension-point pole-head fixture used for live replacement of linear insulators on steel pipe poles of 220kV lines. Two adjustable long holes, both ends of the load-bearing upper beam 1 are provided with U-shaped grooves, the U-shaped grooves are connected with bolts to form tool suspension points, the number of fastening bolts is two, and the two fastening bolts are respectively inserted in sequence The load-bearing upper beam and the fastening lower beam are connected together through adjustable long holes on the fastening lower beam and the load-bearing upper beam. The utility model can be carried out on live lines, which improves the reliability of power supply. It is suitable for all steel pipe pole transmission lines with large spans, single conductors and multiple conductors, which improves the versatility. When the utility model is installed on the head of the cross-arm of the steel pipe rod, it also effectively increases the distance between the live wire and the ground, the air gap, enhances the insulation coefficient and insulation level of the insulating tool, and improves the safety.

Description

220kV line steel pipe rod live replacement linear insulator used double suspension point rod head fixture

technical field

The utility model relates to a special load-bearing tool for replacing linear insulators with steel pipe rods of power transmission lines, in particular to a double-suspension rod head fixture for live replacement of linear insulators with steel pipe rods for 220kV lines.

Background technique

The line of steel pipe pole has the advantages of beautiful appearance, small footprint, and not easy to lose the tower material, but it also has disadvantages such as high cost, inconvenient maintenance, and inconvenient transportation. It has been used in transmission lines in recent years, but not very widely. Such transmission lines are only erected in a few areas or when there are special needs. The insulation tools and operating methods used in the installation and maintenance of traditional live work have not been updated to the new standard in time. Especially when it is necessary to hang the lifting point at the head of the steel pipe rod cross arm, because the steel pipe rod is similar to a cuboid component, the head of the cross arm is smooth and there is no installation hole, so it is difficult to launch the live operation.

Utility model content

The technical problem to be solved by the utility model is to provide a double-suspension-point rod-head fixture for live replacement of linear insulators on 220kV line steel pipe rods. The fixture is installed on the head of the cross-arm of the steel pipe rod, and the vertical load of the wire is transferred by suspending the load-bearing insulating tool to achieve the purpose of being operable when the line is electrified.

In order to solve the problems existing in the prior art, the technical solution adopted by the utility model is:

220kV line steel pipe pole live replacement of linear insulators with double suspension point rod head clamps, including: load-bearing upper beam, fastening lower beam and fastening bolts, the load-bearing upper beam and fastening lower beam are respectively opened Two adjustable long holes, both ends of the load-bearing upper beam 1 are provided with U-shaped grooves, and bolts are connected to the U-shaped grooves to form tool suspension points. The number of fastening bolts is two, and the two fastening bolts are in turn The load-bearing upper beam and the fastening lower beam are connected together through the adjustable long holes on the fastening lower beam and the load-bearing upper beam.

The length of the load-bearing upper beam is 100mm longer than the fastening lower beam.

The advantages and effects that the utility model has are:

1. The utility model has changed the operation items that need to be completed only after power failure in the past, and can be carried out on the live line, which improves the reliability of power supply

2. The utility model can be adapted to the installation of the head of the steel pipe pole cross arm of all 220KV transmission lines in the region, and is suitable for all steel pipe pole transmission lines with large spans, single conductors and multiple conductors, which improves the versatility

3. When the utility model is installed on the head of the cross-arm of the steel pipe pole, it also effectively increases the distance between the live wire and the ground, the air gap, enhances the insulation coefficient and insulation level of the insulating tool, and improves the safety.

4. When the utility model is used on a power outage line, it can improve insulator installation difficulties, fastening and unfastening difficulties caused by the low lifting point of the pulley.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a reference diagram of the usage state of the utility model.

In the figure: load-bearing upper beam 1, fastening lower beam 2, adjustable long hole 3, adjustable long hole 4, fastening bolt 5, U-shaped groove 11, hole 7, bolt 12.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figures 1 and 2, the utility model 220kV line steel pipe rod live replacement linear insulator used double suspension point rod head fixture includes: load-bearing upper beam 1 and fastening lower beam 2, the load-bearing upper beam 1 There are two equidistant adjustable slotted holes 3 on both sides, which are used to adjust the position where the fastening bolts need to be installed and adapt to the width of the steel pipe rod cross-arm head. A U-shaped groove 11 is respectively arranged at both ends of the load-bearing upper beam 1, and a hole 7 is arranged on both sides of the U-shaped groove 11. After the bolt 12 passes through the hole 7, it is fixed by a nut to form a tool suspension point. The tool suspension point is used to hang the insulated tool, which is the most stressed component in this fixture. The fastening lower crossbeam 2 is horizontally placed on the lower layer of the steel pipe rod cross-arm head, and two equidistant adjustable long holes 4 are opened on it to adapt to the width of the steel pipe rod cross-arm head. The number of fastening bolts 5 is two, and the two fastening bolts respectively pass through the adjustable long holes on the fastening lower beam and the load-bearing upper beam to connect the load-bearing upper beam and the fastening lower beam, so that the The invention is firmly seated on the head of the cross-arm of the steel pipe pole. Two fastening bolts 5 are vertically penetrated into the adjustable long holes of the fastening lower crossbeam and the load-bearing upper crossbeam to keep the set of clamps in balance, and are used to bear the unbalanced tension generated during operation. Placed horizontally on the upper layer of the cross-arm head of the steel pipe pole, it is used to bear all the vertical loads from the wires.

The length of the load-bearing upper beam 1 is 100mm longer than the fastening lower beam.

Claims (2)

1. Used pair of suspension centre bar head jig of 1.220kV power line steel tuble pole electrified replacing linear insulator, it is characterized in that including: load entablature, fastening sill and fastening bolt, on described load entablature and fastening sill, respectively have two adjustable slotted holes, the two ends of load entablature 1 are provided with U-lag, on U-lag, be connected with bolt and form instrument hitch point, the quantity of fastening bolt is two, and two fastening bolts link together load entablature and fastening sill through the adjustable slotted hole on fastening sill and load entablature respectively successively.
2. 2. used pair of suspension centre bar head jig of 220kV power line steel tuble pole electrified replacing linear insulator according to claim 1, the fastening bottom rail beam length of the Length Ratio 100mm of the load entablature described in it is characterized in that.