CN2368204Y

CN2368204Y - Conic insulation tension-resisting wire clip

Info

Publication number: CN2368204Y
Application number: CN 99237339
Authority: CN
Inventors: 李书加
Original assignee: TIANMING WIRE-CABLE ACCESSORY Co Ltd WUHAN
Current assignee: TIANMING WIRE-CABLE ACCESSORY Co Ltd WUHAN
Priority date: 1999-03-19
Filing date: 1999-03-19
Publication date: 2000-03-08
Anticipated expiration: 2009-03-19

Abstract

The utility model relates to a conic insulation tension-resisting wire clamp, comprising a clamp block and a fixing sleeve. The utility model is characterized in that the clamp block is made from two blocks of insulation materials which have the same shape; the outer surface of the clamp block forms a semicircular conical shape, and the inner surface of the clamp block forms a semicircular hole shape; the center line of the outer surface of the clamp block and the center line of the inner surface of the clamp block are mutually parallel and have eccentricity; the fixing sleeve is provided with an opening in the axial direction; the inner surface of the fixing sleeve is an inner conical face which is matched with the surface of the clamp block. The wire clamp has the advantages of strong grasp force and no easy clamp, being suitable for the installation and the fixation of an overhead insulating cable the alternating current rated voltage of which can be 10KV and below 10KV.

Description

Conical insulation strain clamp

The utility model relates to the installation and the fixture of aerial insulated cable, and specifically a kind of ac rated voltage that is applicable to is installed and fixing taper shape insulation strain clamp at 10KV and following aerial insulated cable.

According to the development of the industrial urban construction of China's modernization and the requirement of needs and the transformation of rural area confession power utilization network; the 10KV aerial insulated cable is progressively being adopted for power utilization network in China city; and up to the present state's inner high voltage bare wire is still installed at the ＂ strain clamp ＂ that adopts the old-fashioned Soviet Union to make (or imitated) basically; its product is cast iron (or aluminium alloy) manufacturing; adopt a plurality of Luo bolts and bend circuit friction and compress core; and volume is bigger; install inconvenient; if on aerial insulated cable, install; destroy the insulation on the cable easily, between wire clamp and cable, lack reliable insulation protection.Domestic have part producer at present by external sample, having made its product of ＂ wedge shape strain clamp ＂ mainly is made up of aluminum alloy square shaped as frame wire clamp body and plastics wedge folder, in use wire clamp body fracture has appearred and wedge is clipped in the wire clamp body stuck, cable is phenomenon such as slip in wedge folder, and main cause is: 1) wire clamp body insufficient strength.2) the wedge folder is not enough to the normal pressure of cable.Frictional force between big what wedge folder of the frictional force between 3) wire clamp body and wedge press from both sides and cable etc.

Main purpose of the present utility model is in order to solve the deficiency that the above-mentioned background technology exists, to propose a kind of taper shape insulation strain clamp that cable can be held with a firm grip and can be not stuck.

At the foregoing invention purpose, the utility model adopts following technical scheme: a kind of conical insulation strain clamp, comprise fixture block and fixed cover, its special character is that described fixture block is to make with two block-shaped identical insulating material, its outer surface is half cone-shaped, and inner surface is the semicircle hole shape, and the center line of its outer surface and inner surface is parallel to each other and off-centre is arranged, described fixed cover has an opening vertically, and the inner surface of fixed cover is an internal conical surface that can match with the fixture block outer surface.

In such scheme, the eccentric throw of described fixture block inner surface and outer surface center line is selected between 2-4mm.

Fixture block inwall of the present utility model is owing to adopted the circle hole shape structure, especially adopt eccentric design between the fixture block inner and outer wall, two bus (see figure 2)s about making this wire clamp contact-making surface between fixed cover and fixture block in whole operating state be, so just reduced the frictional force between fixed cover and fixture block, coefficient of friction and pressure between fixture block inwall and cable have been increased, make cable obtain enough normal pressures, reach the effect of holding with a firm grip, also can not be stuck between fixture block and the fixed cover simultaneously.

Secondary objective of the present utility model is in order to increase the intensity of fixture block, to prevent abrasion and fracture.

Secondary objective of the present utility model is to adopt at fixture block inner surface embedded with metal sheet to realize that it can increase the intensity of fixture block inwall.

This wire clamp is simple in structure, and is easy to use, be applicable to ac rated voltage in the installation of 10KV and following aerial insulated cable with fixing, and can bear cable stretch.

Below in conjunction with the accompanying drawing illustrated embodiment, describe the utility model in detail.

Fig. 1 is the utility model stereogram.

Fig. 2 is a drawing in side sectional elevation under Fig. 1 operating state.

Fig. 3 is the fixture block stereogram.

As Fig. 1 to Fig. 3, the utility model is made up of fixture block 1, fixed cover 2 and pull bar 3.Wherein fixture block 1 adopts two good electrical property, the ABS that mechanical performance is good (the ABS compound that adds good weatherability) plastics are made, it is poroid that its inner surface is semicircle, outer surface is half cone-shaped, its tapering is 10 °, eccentric throw between inner surface and the outer surface center line is 3mm, studs with sheet metal 4 at the inner surface of fixture block 1, is used for the clamping bare wire.The ZG55 of fixed cover 2 employing process hot galvanizings or ZG40Cr or ZG20CrMn make, its inner surface is an internal conical surface that can match with fixture block 1 outer surface, an opening 5 is arranged on the wall of fixed cover vertically, and pull bar 3 is connected on the fixed cover by engage thread.

When the utility model used, cable 6 was clipped in the circle hole shape inner surface of two fixture blocks 1 tightly.

Claims

1, a kind of conical insulation strain clamp, comprise fixture block and fixed cover, it is characterized in that described fixture block is to make with two block-shaped identical insulating material, its outer surface is half cone-shaped, inner surface is the semicircle hole shape, the center line of its outer surface and inner surface is parallel to each other and has off-centre, described fixed cover that an opening is arranged vertically, and the inner surface of fixed cover is an internal conical surface that can match with the fixture block outer surface.

2, according to the described conical insulation strain clamp of claim 1, it is characterized in that being inlaid with sheet metal at described fixture block inner surface.

3, according to claim 1 or 2 described conical insulation strain clamps, the eccentric throw that it is characterized in that described fixture block inner surface and appearance center line is 2-4mm.

4, according to claim 1 or 2 described conical insulation strain clamps, it is characterized in that on described fixed cover, being connected with pull bar.