CN207052381U - A kind of insulator being used in electric line - Google Patents

Abstract

The utility model relates to an insulator used in power transmission and distribution lines, which comprises an insulator body and clamping fittings. The clamping fittings include a base, a clamping plate, a joint bolt and a lock nut. The base is arranged on the top of the insulator body. The rear end of the pressure plate is connected to the rear end of the base through a rotating shaft, the lower end of the joint bolt is rotationally connected with the front end of the base, the upper end of the joint bolt is a free end, the front end of the pressure plate is provided with a bayonet, and the joint bolt In the process of turning, it can enter and leave the bayonet, and the lock nut is screwed on the free end of the swing bolt; the upper end surface of the base is provided with a lower wire slot, and the lower end face of the pressure plate is opposite to the lower wire slot The position of the upper wire trough is provided, and the wall of the lower wire trough and the wall of the upper wire trough are equipped with piercing teeth; the insulator body is provided with a plurality of sheds along the length of the insulator body. The beneficial effect of the utility model is that the time required for clamping the wire is shortened, and it is more convenient and quick to disassemble and assemble the wire.

Description

An insulator used in transmission and distribution lines

technical field

The utility model relates to the field of power transmission and distribution lines, in particular to an insulator used in power transmission and distribution lines.

Background technique

Insulators are equipment used to ensure the normal operation of power transmission equipment. They play an important role in overhead transmission lines. They are used to ensure sufficient insulation and support for power transmission equipment, so they are widely used in overhead power transmission systems. The insulators in the prior art are very inconvenient when connecting wires, and the operation is relatively complicated. When the insulator in the prior art is connected with the cross arm, the stability is poor.

Utility model content

The technical problem to be solved by the utility model is to provide an insulator used in power transmission and distribution lines to overcome the above-mentioned deficiencies in the prior art.

The technical scheme of the utility model to solve the above technical problems is as follows: an insulator used in power transmission and distribution lines, including an insulator body, a clamping fitting, and a clamping fitting including a base, a pressure plate, a joint bolt, and a lock nut, The base is set on the top of the insulator body, the rear end of the clamping plate is connected to the rear end of the base through a rotating shaft, the lower end of the joint bolt is rotationally connected with the front end of the base, the upper end of the joint bolt is a free end, and the front end of the clamping plate There is a bayonet, the free end of the swivel bolt can enter and leave the bayonet during the rotation, and the lock nut is screwed on the free end of the swivel bolt; the upper end surface of the base is provided with a lower wire groove, and the crimping wire On the lower end surface of the plate, there is an upper wire slot opposite to the lower wire slot, and piercing teeth are provided on the wall of the lower wire slot and the upper wire slot; A plurality of umbrella skirts are provided, and the umbrella diameters of all the umbrella skirts along the direction from top to bottom increase one by one.

The beneficial effect of the utility model is that the clamping time is shortened by using the joint cooperation of the base, the pressure plate, the joint bolt and the lock nut, and the disassembly and assembly of the wire is more convenient and fast. In addition, The shed on the insulator body is designed to increase the shed diameter from top to bottom, which can effectively ensure the cleanliness of the shed and avoid flashover.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, a smooth upper transition arc is provided at the transition between the upper end surface of each shed and the insulator body.

Further, the difference between the diameters of two adjacent sheds on the insulator body is 5mm-20mm.

The further beneficial effect of adopting the above is that it is beneficial to ensure the cleanliness of the insulator body.

Further, it also includes lower fittings and locking bolts, the lower fittings have a U-shaped structure, the U-shaped structure is clamped on the cross arm, and the U-shaped structure is fixedly connected to the cross arm through the locking bolts.

Further, the U-shaped structure includes an upper splint, a web, and a lower splint. The two ends of the web are respectively connected to the upper splint and the lower splint. The distance between the lower end of the upper splint and the upper end of the lower splint is equal to the thickness of the cross arm , the upper splint is provided with a plurality of upper via holes for installing locking bolts, the lower splint is provided with a plurality of lower via holes for installing locking bolts, the upper via holes set on the upper splint and the lower splint The set lower vias correspond to each other one by one.

The further beneficial effect of adopting the above is that the contact area between the insulator body and the cross arm is increased, thereby ensuring sufficient stability after the insulator body and the cross arm are connected.

Description of drawings

Fig. 1 is the front view of the insulator used in the transmission and distribution line described in the utility model;

Fig. 2 is the state diagram when the insulator used in the power transmission and distribution line according to the utility model is installed on the cross arm;

Fig. 3 is A-A to step sectional view of Fig. 1;

Fig. 4 is a schematic structural diagram of the protective cover.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Insulator body, 110, umbrella skirt, 111, upper transition arc surface, 2, wire clamping fittings, 210, base, 211, lower wire slot, 220, pressure plate, 221, bayonet, 222, upper wire release Slot, 230, swing bolt, 240, lock nut, 250, protective cover, 251, arc top cover, 252, side cover, 253, guide post, 3, lower fittings, 310, upper splint, 311, upper pass Hole, 320, web, 330, lower splint, 331, last through hole, 4, locking bolt.

detailed description

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Fig. 1 , Fig. 2 , Fig. 3 and Fig. 4 , an insulator used in power transmission and distribution lines includes an insulator body 1 , clamping fittings 2 , lower fittings 3 and locking bolts 4 .

The insulator body 1 includes a mandrel and an insulating layer wrapped around the mandrel. The mandrel is made of epoxy resin fiberglass rod, which has excellent bending resistance, insulation performance and anti-corrosion performance. The clamping hardware 2 includes a base 210 , a pressure plate 220 , a swing bolt 230 , and a lock nut 240 . The base 210 is arranged on the top of the insulator body 1, and the rear end of the crimping plate 220 is connected to the rear end of the base 210 through a rotating shaft. The crimping plate 220 can rotate around the base 210 at a certain angle with the rotating shaft as the center of rotation. The range is 0°-270°. An arc striking rod is arranged on the base 210 .

The front end of the base 210 extends outwards to form a first epitaxial plate and a second epitaxial plate. A rotating shaft is provided between the first and second epitaxial plates. One end of the rotating shaft is rotatably connected to the first epitaxial plate. The other end is rotatably connected with the second extension plate. The lower end of the swing bolt 230 is sleeved on the rotating shaft, and the lower end of the swing bolt 230 is fixedly connected with the rotating shaft. The swing bolt 230 can rotate around the rotating shaft, and the upper end of the swing bolt 230 is a free end.

The front end of the crimping plate 220 is provided with bayonet sockets 221, wherein the quantity of the bayonet sockets 221 set at the front end of the crimping plate 220 is equal to the quantity of the swing bolts 230, for example, when there are two swing bolts 230, the bayonet sockets 221 are also Two, in this embodiment, the number of swing bolts 230 is preferably two or three. Its (swing bolt 230 ) free end of each swing bolt 230 can enter and break away from bayonet socket 221 in the process of rotating, and when the free end of swing bolt 230 entered in bayonet socket 221, the swing bolt 230 Part of the free end protrudes beyond the upper end surface of the clamping plate 220, and the lock nut 240 is screwed on the free end of the swing bolt 230. When the wire needs to be clamped by the base 210 and the clamping plate 220, the swing The free end of the joint bolt 230 enters into the bayonet 221, and then the locking nut 240 is tightened so that the lower end surface of the locking nut 240 is against the upper end surface of the wire clamping plate 220.

The upper surface of the base 210 is provided with a lower wire slot 211, and the lower end surface of the wire pressing plate 220 is provided with an upper wire slot 222 at a position opposite to the lower wire slot 211. The wall surface of wire groove 222 is all provided with piercing tooth, and the length direction of lower wire groove 211 is identical with the length direction of rotating shaft, and the length direction of upper wire groove 222 is identical with the length direction of rotating shaft. In addition, the insulator body 1 is provided with a plurality of sheds 110 along the length direction of the insulator body, and the shed diameters of all the sheds 110 on the insulator body 1 along the direction from top to bottom increase one by one.

The clamping hardware 2 also includes a protective cover 250, wherein the protective cover 250 is covered with a crimping plate 220, a swing bolt 230, and a lock nut 240. The protective cover 250 includes an arc-shaped top cover 251, a side cover 252, and a guide post 253 , the arc-shaped top cover 251 is a hollow structure with an open lower end, and the side cover 252 is a hollow structure with openings at the top, bottom, and right side, and the upper end of the side cover 252 is connected with the lower end of the arc-shaped top cover 251 , a plurality of guide posts 253 are distributed on the lower surface of the arc-shaped top cover 251. Matching socket holes, when the protective cover 250 is installed on the clamping hardware 2, the guide post 253 is inserted into the socket hole on the crimping plate 220, the arc-shaped top cover 251 covers the crimping plate 220, and the side cover 252 Covering the joint bolt 230 and the lock nut 240 can protect the joint bolt 230 and the lock nut 240 so as to prevent the joint bolt 230 and the lock nut 240 from being difficult to twist after a long time of use.

The upper end surface of each shed 110 on the insulator body 1 is provided with a smooth upper transition arc surface 111 at the connection transition between the upper end surface of each shed 110 and the insulating outer layer. The setting of the upper transition arc surface 111 makes the outer circumferential surface of the insulating outer layer reach the corresponding shed The upper end surfaces of 110 are streamlined and smooth. A smooth lower transition arc surface is provided at the connection transition between the lower end surface of each shed 110 on the insulator body 1 and the insulating outer layer. The difference between the shed diameters of two adjacent sheds 110 on the insulator body 1 is 5 mm-20 mm, that is, the shed diameter of the lower shed 110 of the two adjacent sheds 110 is greater than that of the upper shed 110 The maximum size is 5mm-20mm, specifically 5mm, 8mm, 11.4mm, 13.7mm, 17.2mm, 20mm, preferably around 11.4mm.

The lower fitting 3 has a U-shaped structure, the U-shaped structure is stuck on the cross arm, and the U-shaped structure is fixedly connected with the cross arm through the locking bolt 4, wherein the U-shaped structure includes an upper splint 310, a web 320, a lower splint 330, and the web The upper end of the plate 320 is connected to the upper splint 310, and the lower end of the web 320 is connected to the lower splint 330. The U-shaped structure is preferably made by integral molding process. The distance between the lower end of the upper splint 310 and the upper end of the lower splint 330 is equal to the thickness of the cross arm, and the distance between the end of the upper splint 310 away from the web 320 and the web 320 is equal to the distance between the end of the lower splint 330 away from the web 320 The distance value of the web 320, and the distance value is preferably suitable for the size of the cross arm to be clamped. The upper clamping plate 310 is provided with a plurality of upper via holes 311 for installing the locking bolts 4, and the lower clamping plate 330 is provided with a plurality of lower via holes 331 for installing the locking bolts 4. The via holes 311 correspond to the lower via holes 331 provided on the lower splint 330 one by one. When each locking bolt 4 fixes the U-shaped structure on the cross arm, each locking bolt 4 penetrates the upper splint 310 and the cross arm at the same time. Bear, lower splint 330. The upper splint 310 is provided with an arc suppression cap matching with the arc striker.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (5)

1. An insulator used in power transmission and distribution lines, characterized in that it includes an insulator body (1), a clamping fitting (2), and the clamping fitting (2) includes a base (210), a crimping plate ( 220), swivel bolts (230), lock nuts (240), the base (210) is arranged on the top of the insulator body (1), and the rear end of the clamping plate (220) is connected to the base (210) ) is rotationally connected by a rotating shaft, the lower end of the joint bolt (230) is rotationally connected with the front end of the base (210), the upper end of the joint bolt (230) is a free end, and the pressure plate The front end of (220) is provided with bayonet socket (221), and its free end can enter and break away from bayonet socket (221) during the rotation process of described swing bolt (230), and described lock nut (240) is screwed on The free end of the swivel bolt (230); the upper end surface of the base (210) is provided with a lower wire groove (211), and the lower end surface of the pressure plate (220) is connected with the lower wire groove (211) The opposite position is provided with an upper wire release trough (222), and the walls of the lower wire release groove (211) and the upper wire release groove (222) are provided with piercing teeth; the insulator body (1 ) is provided with a plurality of sheds (110) along the length direction of the insulator body, and the shed diameters of all the sheds (110) along the direction from top to bottom increase one by one. 2. An insulator used in power transmission and distribution lines according to claim 1, characterized in that, the connection transition between the upper end surface of each shed (110) and the insulator body (1) is provided with a smooth Upper transition arc (111). 3. The insulator used in power transmission and distribution lines according to claim 2, characterized in that the difference between the shed diameters of two adjacent sheds (110) on the insulator body (1) is 5mm -20mm. 4. An insulator used in power transmission and distribution lines according to claim 3, characterized in that it also includes a lower fitting (3) and a locking bolt (4), and the lower fitting (3) is U-shaped structure, the U-shaped structure is clamped on the cross arm, and the U-shaped structure is fixedly connected with the cross arm through locking bolts (4). 5. The insulator used in power transmission and distribution lines according to claim 4, characterized in that, the U-shaped structure comprises an upper splint (310), a web (320), and a lower splint (330), the The two ends of the web (320) are respectively connected with the upper splint (310) and the lower splint (330), and the distance between the lower end of the upper splint (310) and the upper end of the lower splint (330) is equal to The thickness value of the cross arm, the upper splint (310) is provided with a plurality of upper through holes (311) for installing locking bolts (4), and the lower splint (330) is provided with a plurality of holes for installing The lower through hole (331) of the locking bolt (4), the upper through hole (311) set on the upper splint (310) and the lower through hole (331) set on the lower splint (330) One to one correspondence.