CN103606849B - Transmission tower multiple fission conductor live line working lifting device and special mould clamp thereof - Google Patents

Abstract

The lifting device and its special fixture for live work with multi-split conductors on transmission poles and towers relates to methods or equipment dedicated to installing, maintaining, repairing or dismantling cables or wires, including the first and second lifting mechanisms and special fixtures. The two lifting mechanisms pass through The special fixture is connected to the clamp connecting plate supporting the multi-split wire, and the clamp connecting plate, the suspension clamp and the multi-split wire are lifted as a whole. The special clamp is composed of a fixing plate and a connecting plate welded on the bottom of the fixing plate; lifting The mechanism is a screw nut mechanism, which is suspended to the cross arm of the pole tower through an insulated traction cable; the protruding end of the screw of the lifting mechanism passes through the through holes at both ends of the fixing plate, and is embedded in the space between the special clamp and the connecting part of the clamping plate Inside, ensure that there is an air gap that meets the requirements of live operation between the metal parts of the multi-split wire live operation lifting device and the cross arm. The device has a simple structure and is easy to use. Combined with the use of insulating tools, it can meet the requirements of live work for maintenance and repair of UHV transmission lines.

Description

Lifting device and its special fixture for live work with multi-split conductors on transmission poles and towers

technical field

The present invention relates to a method or equipment specially used for installing, maintaining, repairing or dismantling cables or wires, in particular to a multi-split live wire lifting device for overhead line tower poles and its special fixture.

Background technique

Multi-split wire is a wire erection method adopted by EHV transmission lines to suppress corona discharge and reduce line reactance. The multi-split wire is composed of several sub-wires with smaller diameters, and each sub-wire is arranged at a certain distance and arranged in a symmetrical polygon, and arranged on the vertices of the regular polygon. At present, UHV AC and DC lines above 500KV usually use four-split, six-split or even eight-split conductors. In the maintenance and repair construction of multi-split conductor control lines, it is often necessary to lift a group of conductors that make up the multi-split conductor at the same time, so as to replace damaged tension-resistant insulator strings or other line fittings. The Chinese utility model patent "a hoisting device for live work with multi-split conductors at the tower head" (utility model patent number: ZL200720085186.0 authorized announcement number: CN201044342Y) discloses a hoisting device for live work with multi-split conductors at the tower head. The device includes The two supporting bases are characterized in that the two supporting bases are connected by an adjustable-length lead screw assembly, and the two supporting bases are respectively equipped with vertical screw rods. The lower end of the vertical screw rod can be connected with the insulating suspension rod, and the upper part It is connected with the lead screw sleeve placed above the seat body. The utility model multi-split wire live working hoisting device is used in conjunction with a six-split wire hook, which can lift the energized wire and replace the insulator string without power failure. However, this utility model multi-split wire live working lifting device needs to be used in conjunction with a six-split wire hook, and its connection and operation process is relatively complicated, and it is still inconvenient to operate for overhead lines.

Contents of the invention

The purpose of the present invention is to provide a lifting device for live work of multi-split conductors of transmission poles and towers, which is used in live work of transmission poles and towers, and simultaneously lifts a group of conductors that form multiple split conductors, so as to perform operations such as replacing insulators and line fittings.

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

A lifting device for live work with multi-split wires on transmission poles and towers, including a first lifting mechanism, a second lifting mechanism and special clamps, characterized in that:

The first lifting mechanism and the second lifting mechanism are connected to the wire clip connecting plate supporting the multi-split conductor through a special fixture; the lifting force provided by the first lifting mechanism and the second lifting mechanism connects the wire clip connecting plate, the hanging wire clip and The multi-split conductor is lifted as a whole, and the load of the tension-resistant insulator string is transferred to the multi-split conductor live working lifting device, so that the insulators and line fittings of the tension-resistant insulator string are in an unstressed state;

The first hoisting mechanism and the second hoisting mechanism are lead screw nut mechanisms; the upper ends of the first hoisting mechanism and the second hoisting mechanism are respectively hung on the cross arm of the power transmission tower through an insulating traction cable;

The special fixture is composed of a fixed plate and a pair of connecting plates welded on the bottom of the fixed plate; the lower ends of the first lifting mechanism and the second lifting mechanism are respectively connected to the two ends of the fixing plate; The upper end is sandwiched between two parallel connecting plates; by means of bolts or pins passing through the hinged shaft holes of the two connecting plates and the clamp connecting plate, the special clamp is connected with the clamp supporting the multi-split wire The plates form a hinged structure;

The protruding end of the lead screw of the screw nut mechanism passes through the connecting through holes at both ends of the fixing plate respectively, and is inserted into the space between the special clamp and the connecting part of the clamping plate, so as to ensure the safety of the multi-split wire live working lifting device. Between the metal parts and the cross arm of the transmission tower, keep an air gap that meets the requirements of live operation.

A technical scheme of the lifting device for live work with multi-split wires on transmission poles and towers of the present invention is characterized in that the special fixture is composed of a fixed plate and two connecting plates, and the upper ends of the two connecting plates are welded vertically and symmetrically on the fixed The bottom surface of the plate is arranged in a π-shaped structure with the horizontally arranged fixed plates.

A preferred technical solution of the multi-split wire live working lifting device of the present invention is characterized in that the two ends of the fixing plate of the special fixture are bent downwards, forming an included angle of <90° with the two connecting plates , to ensure that the angle between the axes of the first lifting mechanism and the second lifting mechanism connected to both ends of the fixing plate is consistent with the angle between the two insulating pull cables.

The beneficial effects of the present invention are:

The lifting device for live work with multi-split wires on transmission poles and towers of the present invention, the screw rod of the lifting mechanism is embedded in the fixture, ensuring a sufficient air gap between the metal parts and the cross-arm, its structure is simple, easy to use, combined with the use of insulating tools , which can meet the requirements of live work for maintenance and repair of UHV transmission lines.

Description of drawings

Fig. 1 is the structure schematic diagram of the multi-split wire live working hoisting device of the transmission pole tower of the present invention;

Fig. 2 is the front view of the special jig used for the lifting device for live work of the multi-split conductor of the transmission pole tower of the present invention;

Fig. 3 is the A-A cross-sectional view of the special fixture used for the multi-split wire live working lifting device of the transmission pole tower of the present invention;

Fig. 4 is a schematic diagram of the working state of the lifting device for live work of multi-split conductors of a transmission pole tower of the present invention for lifting six-split conductors.

The labels of the components in the above figure: 1-iron tower cross arm, 2-tension insulator string, 3-suspension line clamp, 4-suspension line clamp clamping plate, 5-first lifting mechanism, 6-second lifting Mechanism, 7-insulated traction cable, 10-special fixture, 11-fixed plate, 12-joint plate, 13-reinforcing ring, 14-bolt or bearing pin, 15-hinged shaft hole, 16-connection through hole.

Detailed ways

In order to better understand the above technical solutions of the present invention, a further detailed description will be given below in conjunction with the drawings and embodiments.

An embodiment of the live work hoisting device for multi-split conductors of transmission pole towers according to the present invention is shown in Figure 1, which is used for maintenance work such as exchanging insulators and line fittings in live work of transmission pole towers, and the multi-split conductors in the embodiment shown in Figure 4 are The six-split conductor is composed of 6 sub-conductors respectively clamped on 6 sets of suspension clamps 3. The suspension clamps 3 are arranged in a symmetrical hexagonal shape on the clamping plate 4, and the clamping plate 4 passes through the tension-resistant insulator string 2. Suspended on the power transmission pole tower; as shown in Figure 1, the multi-split wire live working lifting device includes a first lifting mechanism 5, a second lifting mechanism 6 and a special clamp 10; the first lifting mechanism 5 and the second lifting mechanism 6 pass a special Fixture 10 is connected to the wire clip connecting plate 4 supporting multi-split wires, and the lifting force provided by the first lifting mechanism 5 and the second lifting mechanism 6 will lift the wire clip connecting plate 4, the suspension wire clamp 3 and the multi-split wire as a whole , transferring the load of the tension-resistant insulator string 2 to the multi-split wire live working hoisting device, so that each insulator and line fittings of the tension-resistant insulator string 2 are in an unstressed state;

The first lifting mechanism 5 and the second lifting mechanism 6 are leading screw nut mechanisms; in the embodiment shown in Fig. 1 and Fig. 4, the first lifting mechanism 5 and the second lifting mechanism 6 adopt the leading screw nut mechanism with handle, By turning the handle on the lead screw nut, the nut is driven to rotate around the lead screw, the lead screw is driven to move up and down in the axial direction, and the special jig 10 is driven to complete the lifting operation of the multi-split wires. The upper ends of the first hoisting mechanism 5 and the second hoisting mechanism 6 are respectively hung on the crossarm 1 of the power transmission tower through an insulating traction cable 7;

The special fixture 10 is made up of a fixed plate 11 and a pair of connecting plates 12 welded on the bottom surface of the fixed plate 11; the lower ends of the first lifting mechanism 5 and the second lifting mechanism 6 are respectively connected to the two ends of the fixed plate 11, and the wire The protruding end of the lead screw of the rod nut mechanism respectively passes through the connecting through holes 16 at both ends of the fixing plate 11, and is inserted into the space between the special fixture 10 and the connecting part of the clamp connecting plate 4 to ensure that the multi-split wire live working lifting device An air gap that meets the requirements of live operation is reserved between the metal parts and the cross arm 1.

The multi-split wire lifting special jig of the present invention is shown in Figure 2 and Figure 3, and is used for the transmission pole tower multi-split wire live work lifting device shown in Figure 1, and the special jig 10 is composed of a fixed plate 11 and two connecting plates 12 Composition, the upper ends of two connecting plates 12 are symmetrically welded vertically on the bottom surface of the fixing plate 11, and are arranged in a π-shaped structure with the fixing plates 11 arranged horizontally; Between the connecting plates 12 juxtaposed; on the center line of the two connecting plates 12 and the wire clip connecting plates 4, there are hinged shaft holes 15 that run through the two connecting plates 12 and the wire clamping connected plates 4, by passing through the hinged shaft holes 15 bolts or bearing pin 14, special fixture 10 and the wire clip connecting plate 4 that supports many split wires form a hinged structure.

As shown in Figures 1 and 2, the two ends of the fixed plate 11 are bent downwards to form an angle of <90° with the two connecting plates 12, so as to ensure that the first lifting mechanism 5 and the second lifting mechanism connected to the two ends of the fixed plate 11 The included angle of the axes of the two hoisting mechanisms 6 is consistent with the included angle between the two insulating traction cables 7 . In the embodiment shown in Fig. 1 and Fig. 2, the included angle between the two insulated traction cables 7 is 20°, therefore, the two ends of the fixed plate 11 and the two connecting plates 12 respectively form an included angle of 80° .

As shown in Figure 2, on the upper side of the connecting through hole 16 at both ends of the fixing plate 11, and on the outside of the hinge shaft hole 15 at the lower end of the two connecting plates 12, a reinforcement ring 13 is respectively welded and fixed to strengthen the edges of each through hole The strength meets the requirements for overall upgrading of the wire clamp connecting plate 4, the suspension wire clamp 3 and the multi-split wires.

Those of ordinary skill in the technical field should recognize that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not used as limitations to the present invention. All changes and modifications will fall within the protection scope of the claims of the present invention.

Claims (3)

1. A lifting device for live work with multi-split wires on transmission poles and towers, comprising a first lifting mechanism, a second lifting mechanism and special clamps, characterized in that: The first elevating mechanism and the second elevating mechanism are connected to the wire clip connecting plate supporting the multi-split wires through special clamps; The lifting force provided by the first hoisting mechanism and the second hoisting mechanism can lift the wire clip connecting plate, the suspension wire clip and the multi-split conductor as a whole, and transfer the load of the tension-resistant insulator string to the live working lifting device of the multi-split wire, so that the tension-resistant insulator All insulators and line fittings in the string are under stress; The first hoisting mechanism and the second hoisting mechanism are lead screw nut mechanisms; the upper ends of the first hoisting mechanism and the second hoisting mechanism are respectively hung on the cross arm of the power transmission tower through an insulating traction cable; The special fixture is composed of a fixed plate and a pair of connecting plates welded on the bottom of the fixed plate; the lower ends of the first lifting mechanism and the second lifting mechanism are respectively connected to the two ends of the fixing plate; The upper end is sandwiched between two parallel connecting plates; by means of bolts or pins passing through the hinged shaft holes of the two connecting plates and the clamp connecting plate, the special clamp is connected with the clamp supporting the multi-split wire The plates form a hinged structure; The protruding end of the lead screw of the screw nut mechanism passes through the connecting through holes at both ends of the fixing plate respectively, and is inserted into the space between the special clamp and the connecting part of the clamping plate, so as to ensure the safety of the multi-split wire live working lifting device. Between the metal parts and the cross arm of the transmission tower, keep an air gap that meets the requirements of live operation. 2. The hoisting device for live work with multi-split wires on transmission poles and towers according to claim 1, characterized in that, the special fixture is composed of a fixed plate and two connecting plates, and the upper ends of the two connecting plates are welded vertically and symmetrically. The bottom surface of the fixed plate is arranged in a π-shaped structure with the horizontally arranged fixed plates. 3. The hoisting device for live work with multi-split wires for transmission poles and towers according to claim 2, characterized in that, the two ends of the fixing plate of the special fixture are bent downwards to form a clamp of <90° with the two connecting plates. Angle, to ensure that the angle between the axis of the first lifting mechanism and the second lifting mechanism connected at both ends of the fixed plate is consistent with the angle between the two insulating pull ropes.