SU1064338A1 - Vacuum selector switch - Google Patents

Description

2. The switch pop.1; differing from the fact that the fastening assemblies of the arcing block are equipped with spring-loaded current collection elements from a material with high electrical conductivity. .

The invention relates to high-voltage switches, in particular to vacuum switches.

In a number of cases, the arc-suppressing devices of vacuum circuit breakers must be protected from external influences in order to provide the necessary electrical strength. This can be achieved by pouring the outer surface of the vacuum arcing chambers (.VDK) with solid insulation ij. .

However, these devices protect VDK from external influences of the road and make it difficult to maintain the switch.

Protection devices are known in which VDK is mounted inside a hollow insulation tire, most often made of porcelain. In this case, the switches are easy to manufacture and easy to maintain, as this tire can be removed and put on the switch without breaking its kinematic connections, and you can make the switch setting without. tires, and then put on a tire, without disrupting its normal operation.

Closest to the present invention, there is a vacuum circuit breaker comprising an arcing block consisting of at least one vacuum arcing chamber, an insulating tire, a gas arresting block and a mounting flange.

However, the final part of the assembly of a known switch (dressing the tire and attaching it to the stationary parts of the switch) poses considerable difficulties, which are due to the fact that during the final assembly two joints are joined — the arc suppression block and the insulation tire — each of which can be performed only with large tolerances. Therefore, when joining these parts and during operation, especially when the temperature changes rapidly, considerable mechanical stresses occur in the parts of the structure and their deformation, which can lead to jamming of the switch mechanism, lowering the dielectric strength due to

impaired integrity of the internal cavity and the occurrence of cracks in the insulation tire.

The purpose of the invention is to increase the dielectric strength and reliability of a vacuum switch with a loose-fitting and removable insulation tire by eliminating undesirable mechanical stresses and

0 deformations of parts, and also the simplification of manufacturing technology.

. Indicator: This goal is achieved by the fact that in a vacuum switch containing an arcing block consisting of at least one vacuum arcing chamber, an insulating tire covering the arc. heavy block and mounting flange, arcing block attached

at one end to the mounting flange. by means of an additionally inserted fastening element, allowing angular rotation, the axis of the arcing block, and the other end of the arc suppressing unit is connected to the loose end of the insulation tire by another additionally inserted fastening assembly, allowing both angular rotation and movement along the axis.

The fixing units of the arc-suppressing unit are equipped with spring-loaded elements of current collection from material with ay-,

i high electrical conductivity.

The proposed mount does. the support flange arching system of the arc-suppressing unit - insulation insulating surface is statically determinable, due to which mechanically are excluded;

0 Ukie voltages in the parts assembly and operation. At the same time, the mount is rigid, since the number of degrees of freedom of both pokryshki and arcing block is equal to

5 zero. Both units of fastening of the arc-suppressing unit can simultaneously with the functions of mechanical kreplani perform current-transmitting functions, for which parts are inserted into these nodes, providing current collection, for example, spring-loaded strands of high electrical conductivity material.

Fig. 1 shows the principle of fastening an arc suppressor 5 can ° block; 2 and 3 - option

design of mountings of the arc-suppressing unit. The circuit (Fig. 1) contains a frame 1 of a switch with a supporting insulator 2 fixed on it, the high-voltage end of which ends with a mounting flange 3. An insulation tire 4 and a node are attached to the flange 3.

5 reinforcement arc block

6 of the series-connected VDKx 6 and 7. The fastening assembly 5 has angular mobility within the limits sufficient to compensate for production tolerances in the manufacture of switch components; The loose end of the insulating tire 4 is terminated by a flange 8, on which the fixing unit 9 for the arcing block 6 is fixed. parts Current collection is carried out with the terminals 10 fastened to the flanges 3 and 8. As can be seen from FIG. 1, the proposed fastener allows you to freely remove and wear

: insulating tire 4 to arc suppression block b, but not:

The mechanical stress in the parts of the deviation switch is a factor; measures due to the fact that nodes 5 and 9 of the spotting make it possible to compensate for the longitudinal and angular displacements of tire 4 relative to the arc-suppressing unit 6..

Figure 2 shows the assembly fixing unit 5 to the flange 3 in the form of a spherical hinge, and to the flange 8 by means of the assembly 9 in a self-clamping current collection. Another variant of node 5 is shown in FIG. The lower part of the VDK block has at least three support legs 11, installed

10 on the adjusting sleeves 12. The sleeves 12 are fixed on the flange 3 with the sots. it is possible to move along the axis 6 along the thread when adjusting the alignment of the block with the insulator. The fixing of the support lamps 11 to 3 is carried out by means of tie rods 13.

In the proposed switch, the accuracy requirements for the manufacture of parts of the arc-suppressing unit and the insulation tire are simplified and the assembly is facilitated, since the attachment points allow for significant mutual movement of the parts.

5, the deformations and mechanical stresses in the parts are eliminated, thereby increasing the reliability of the switch both from the point of view of the mechanism and from the point of view of the operation of the internal insulation due to the improved tightness, as well as the reduction of the mechanical stresses in the insulation tire that allows you to perform it more thin-walled and reduce the weight and cost

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Claims (2)

- 2. Japan Accepted Application No. 25596/74, cl. N 59 N 142, 1949. ') 1. VACUUM CIRCUIT BREAKER, comprising an arcing unit, consisting of at least one vacuum arrester chamber, an insulating cover covering the arcing unit and a mounting flange, characterized in that, in order to increase electric strength, reliability and simplification of manufacturing technology, interrupter. unit is attached at one end to the mounting flange by the fixing unit further introduced, allowing angular rotation axis of the arc block and the other end connected to the arc block loose end via another insulating tires additionally introduced fastener assembly allows both uglovoy.po- _of the gate and displacement along the axis. $ q fill 2. The switch according to claim 1), wherein the fastening nodes of the arcing unit are equipped with spring-loaded elements for current collection from materials with high electrical conductivity.