CN204258160U - Change transmission tower insulator instrument - Google Patents

Abstract

The utility model discloses a kind of replacing transmission tower insulator instrument, relate to the electric device service technique field of transmission line; Comprise rear card and screw mandrel, screw mandrel is provided with handle; Rear cartoon cross screw mandrel and before link and connect; Front card comprises base and is columniform the core of the card, and base is provided with the hole for installing the core of the card and is connected with the core of the card by hold-down screw; The core of the card is provided with groove, the wall of these groove both sides is respectively equipped with breach.Length consuming time when it can solve replacing 500 kilovolt tangent tower two string side of wire first insulator, instrument carrying go up a hill difficulty, the problem of Suspension Small Angle Towers wire first insulator cannot be changed.

Description

Tool for replacing pylon insulators

technical field

The utility model relates to the technical field of electric device maintenance of power transmission lines, in particular to a line tower insulator replacement tool for replacing the first piece of insulator on the double-string conductor side of a 500 kV straight line tower.

Background technique

The insulator is used to support the wire, and make the wire and the earth, the tower have a sufficient safety distance and insulation, and have a certain electrical insulation strength and mechanical strength. In the operation of transmission lines, insulators are exposed to the wild and work under long-term strong electric fields and tension, and zero values are prone to occur. Due to the characteristics of the glass insulator, it will explode when there is a zero value. According to the voltage distribution characteristics of the insulator, the first insulator near the wire side receives the highest voltage, and is most likely to be zero and self-destruct. The occurrence of zero values in the same string of insulators will affect the voltage distribution of the entire string of insulators, and promote the deterioration of the insulators. When the number of good insulator strings does not meet the safety regulations, it will threaten the safe operation of the transmission line. Therefore, it is necessary to replace the line self-destruct insulators regularly. .

The maintenance work of replacing self-violent insulators is usually replaced with special fixtures. At present, there is no special fixture for the replacement of the first insulator of the double-string conductor of the 500kV straight tower. Generally, chain hoists and supporting tools are used to complete the replacement. The following problems exist:

1. When using the chain hoist and supporting tools to replace the first piece of the 500kV straight tower double-string insulator wire, there are many supporting tools and the installation process is complicated. One worker is required for the tower head and one worker for the wire. Two people cooperate to complete it, which consumes manpower Many, time-consuming.

2. The transmission line towers are all in the wild, mostly on the mountainside or on the top of the mountain. The mountains are high and the roads are far away. The chain hoist and supporting tools are heavy, and it is difficult to move the tools up the mountain. At the same time, there is a risk of falling.

3. To replace the insulator with the supporting tools of the chain hoist, it is necessary to lift the conductor with a large stroke.

4. Replace the insulator in the case of a large span, and the wire rope head connected to the tower head needs to be protected. The wire is too heavy, and there is a risk of deformation and damage to the tower head and tools.

5. For straight pole towers with small corners, the insulator strings have an inclination angle, and the chain hoist supporting tools cannot replace the first insulator on the side of the double string wire.

Contents of the invention

The purpose of the utility model is to provide a tool for replacing the insulators of the line tower, which can solve the problem of long time-consuming replacement of the first insulator on the side of the double-string conductor of the 500 kV line straight tower, difficulty in carrying the tool up the mountain, and the inability to replace the first wire of the straight line small corner tower. A piece of insulator problem.

In order to solve the above problems, the technical solution adopted by the utility model is: the tool for replacing the insulator of the line tower includes a rear card and a screw rod, and a handle is arranged on the screw rod; the rear card passes through the screw rod and the front card connection; the front card includes a base and a cylindrical card core, the base is provided with a hole for installing the card core; the card core is provided with a groove, and the walls on both sides of the groove are respectively provided with gap.

In the above technical solution, a more specific solution may also be: the groove is in the shape of a wide top and a narrow bottom, and the bottom of the groove is inclined.

Further: the base is in the shape of a large center and small ends, and the sides of both ends of the base are provided with holes for connecting with the screw.

Further: the narrow part of the groove is 26 mm, the wide part is 46 mm, the deepest depth from the top to the bottom is 80 mm, and the inclination angle between the bottom and the horizontal line is 40 degrees.

Owing to adopting above-mentioned technical scheme, the beneficial effect that the utility model has compared with prior art is:

Due to the setting of the front clamp, when replacing the first insulator on the side of the double-string conductors of the 500 kV line straight tower, the chain hoist is not needed, and a staff member works on the pole, transporting the installation tools, removing the old insulators, and installing new insulators. It is done by one person alone, and one person only needs 30 minutes to complete the work of dismantling and assembling the insulators, which shortens the time consumption, and the utility model is light in weight and very convenient to carry up the mountain.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a top view with the card and screw removed.

Fig. 3 is a sectional view along line A-A of Fig. 1 .

Detailed ways

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

The tool for replacing the line tower insulator shown in Fig. 1, Fig. 2 and Fig. 3 includes a rear card 5 and a screw mandrel 4, and the screw mandrel 4 is provided with a handle 7; the rear card 5 is connected with the front card 6 through the screw mandrel 4; The card 6 includes a base 1 and a cylindrical card core 3, the base 1 is provided with a hole for installing the card core 3 and is connected with the card core 3 by a fixing screw 2; the card core 3 is provided with a groove, and the walls on both sides of the groove There are notches on them respectively. The groove is wide at the top and narrow at the bottom, and its bottom is inclined. The base 1 is in the shape of a large middle and small ends, and the sides of the two ends of the base 1 are provided with holes for connecting with the screw mandrel 4 .

The connection method of the first piece of insulator on the wire side is: insulator, bowl head, and triangular plate. The front clamp 6 and the rear clamp 5 loosen the insulator by tightening the threaded mandrel 4, so as to keep the stress on the same line as the insulator string. Therefore front card 6 is designed as: card core 3 adds base 1. After measuring and calculating the size of the connecting fittings, the clamp 3 needs to fix the triangular plate and the edge bolts, and a width of 26 mm is opened in the middle of the cylindrical clamp 3, and the bottom is provided with a 40-degree inclination, and the depth from the top to the bottom is the deepest It is a groove of 80 mm, which is consistent with the width, depth and inclination of the triangular plate. Widen 20 millimeters at the groove wall place of the opening of card core 3, make this groove form the shape that is wide at the top and narrow at the bottom, makes it conform to the shape of the bowl head.

The utility model only needs to be operated by a single person, and the installation is convenient. When replacing the insulator, the screw rod can be tightened by shaking the handle 7, and the insulator can be disassembled and installed after being pre-tightened by 2 cm. Balanced and on the same straight line, reducing the risk of deformation and damage to tools and equipment. At the same time, it solves the problem that the gourd supporting tool cannot replace the first insulator of the small corner straight tower conductor. The utility model has few supporting tools, light weight, is convenient for mountaineering, transportation and installation, and can efficiently and safely complete line maintenance and replacement work.

Claims (4)

1. change a transmission tower insulator instrument, it is characterized in that: comprise rear card (5) and screw mandrel (4), described screw mandrel (4) is provided with handle (7); Described rear card (5) is connected with front card (6) by described screw mandrel (4); Described front card (6) comprises base (1) and is columniform the core of the card (3), and described base (1) is provided with the hole for installing described the core of the card (3); (3) are provided with groove to described the core of the card, and the wall of these groove both sides is respectively equipped with breach.

2. replacing transmission tower insulator instrument according to claim 1, is characterized in that: described groove is shape wide at the top and narrow at the bottom, and the bottom of this groove becomes skewed.

3. replacing transmission tower insulator instrument according to claim 1 and 2, is characterized in that: described base (1) is broad in the middle, that two is little shape, and the side opening at this base (1) two ends has the hole for being connected with described screw mandrel (4).

4. replacing transmission tower insulator instrument according to claim 1 and 2, it is characterized in that: the narrow place of described groove is 26 millimeters, wide place is 46 millimeters, and the innermost from the top to the bottom degree of depth is 80 millimeters, is 40 degree with horizontal angle of inclination bottom it.