SU1379808A1 - Bushing insulator - Google Patents

Abstract

The invention relates to electrical engineering and is intended for the isolation and fastening of current-carrying parts in electrical appliances and switchgear sets. The purpose of the invention is to simplify the design while improving reliability. The device includes an insulating body 1 with an annular groove 2 on the inner surface, a current-carrying part 3 with a centering washer 4 in which the holes 5 for the bolts 6 are formed, and a locking element. The latter is made in the form of two rings conjugated to each other (K) of a non-magnetic material: outer 7 and inner 8. The outer K is elastic, open, has an inner conical surface, and an annular protrusion 9 is formed on its outer surface, which is placed in the groove 2 . The height of the protrusion 9 does not exceed the depth of the groove 2. The inner K 8 has a response conical bench. the surface and the holes 10 for the bolts 6. The centering washer 4 and the inner K 8 are connected to each other through the holes 5 and 10 by bolts 6. 2 il, i (L

Description

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The invention relates to electrical engineering, in particular, to transition insulators, and can be used for fastening current-carrying parts in electrical apparatuses and complete switchgears.

The aim of the invention is to simplify the design and increase reliability.

Fig. 1 shows a bushing with a live part fixed in it, a frontal projection; figure 2 - section aa in figure 1.

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The bushing comprises an insulator - 5, with the help of bolts, a 6th casing 1 with an annular groove 2, filled on its inner surface, a conductive element 3 with a centering iaiba 4, which has 5 holes for bolts 6, and a fixing element that is made of outer 7 and inner 8 conjugated rings of non-magnetic material. The outer ring 7 has an inner conical surface, and an annular protrusion 9 is formed on the outer surface, which is placed in the annular groove 2 of the housing 1. The inner ring 8 has a counter conical outer surface and the holes 10 for the bolts 6. The outer ring 7 is open-ended, elastic, thanks to what makes it possible to install the outer ring in the insulator housing I and move the inner ring 8 along the inner surface of the outer ring until the fixing element is securely fixed in the groove 2 means protrusion 9 whose height is equal to or mensche groove depth. A centering iaib 4 is rigidly attached to the contact element -3 installed in the opening 11 of the fixing element. The latter and the inner ring 8 are connected to each other through the opening 5 and 10 with bolts.

The isolator is mounted as follows.

First, the outer ring 7 is compressed and when the diameter D becomes equal to

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screwing up the bolts, closing and elasticity of the ring 7, the inner one to the inside of the outer unclamping last, secures it in the working. The invention allows the design of the passage to facilitate its assembly and reliability of fixing the parts, and therefore the reliability of the insulator

Claims (1)

Formula isob The hollow body of the insulator is insulated with an annular groove of the surface; a current-carrying element is installed, its centering lug under the fastening elements is an element that, in order to simplify and increase, the reliable element is made of matching conical rings of non-magnetic in the inner hole, coaxial holes on the outer hole - a slot protrusion that interacts with the body, and the ring is made of a heel much higher than the depth of the groove. or smaller D (FIG. 2), it is put into the housing, and then unclamped, is fitted with a protrusion 9 into the annular groove 2, Next, the inner ring B with the nuts 12 pre-fixed in the mounting holes 12 is installed into the Outer ring 7, and the element 3 with the centering washer 4, which is rigidly attached to it, is placed in the hole 11. Then, by aligning the holes 5, the washers 4 with the holes of the ring 8 are screwed 0 five 0 whether using bolts 6 five 0 five 0 centering 10 internal specified parts- and nuts 12. When screwing the bolts, due to the openness and elasticity of the outer ring 7, the inner ring 8 moves inside the outer ring 7, expanding the latter, finally fixes it in the working position. The invention allows to simplify the construction of the bushing insulator, to facilitate its assembly and to increase the reliability of fixing the current-carrying part, and consequently, to increase the reliability of the insulator as a whole. Invention Formula A bushing, a hollow body made of an insulating material with an annular groove on the inner surface, a current-carrying element installed in the body, enclosing its centering plate with holes for fasteners and fixing element, which is designed to simplify and increase reliability, the fixing element is made in the form of two rings of nonmagnetic material that mate along conic surfaces, in the inner one of which there are holes, coaxially with the opening of the faceplate, and on the outer side - rez and an annular projection cooperating with a groove housing, the projection height does not exceed the depth of the groove and the outer ring made from a resilient material.