RU97222U1 - LOW-VOLTAGE COMPLETE DEVICE TIRE HOLDER - Google Patents

Abstract

 Tire holder of a low-voltage complete device (NKU), containing two parallel mutually arranged metal rails remotely fastened with screw studs with the possibility of rapprochement - sliding, insulators on each rail equipped with grooves for the ribs (side ends) of the tires and a bolt pair fixing element, by means of which the insulators are dispersedly attached to the rails, characterized in that the grooves in the insulator are made stepwise recessed with a decrease in the width of the more recessed holes in the rails for the studs placed in between the insulators, at least one of them (hole) in each rail is equipped with a dielectric sleeve, the upper ends of the studs protrude beyond the size of the upper rail with the possibility of fastening to the supporting structure of the NKU (cabinet), and embedded in the body of the insulator An element of a bolt pair is the bolt head.

Description

The utility model relates to electrical engineering, namely to low-voltage complete cabinet-type devices.

Known tire holder AESMA, Spain (see the prospectus of the company for insulators for copper busbars SB-5/10), containing two metal rails profile type, parallel to the distantly fastened with threaded rods with the possibility of oncoming rapprochement; studs are interfaced with rails at their ends; insulators are distributed to the rails by means of bolted pairs, distributed over the length of the rails at intervals; insulators have grooves (longitudinal and transverse) to accommodate the edges of copper busbars of various thicknesses in them.

The disadvantages of this tire holder (prototype of the claimed) are as follows:

- the insulator has grooves of two dimensions along the thickness of the tires 5 and 10 mm; With the nomenclature of tire thicknesses (mm) of 5, 6, 8 and 10, it is necessary to have an additional different standard size of insulator;

- tightening the rails with studs located at their ends, leading to their "buckling" in the central part and, as a result, to weakening the fixation of tires in the middle insulators;

- in each insulator there is a mortgage nut under a bolt of fastening to a lath through an opening in it. Such a solution complicates the assembly technology by the need to find the position of coincidence of the rail hole with the nut hole visually hidden by the insulator body;

- fastening the busbar holder in the cabinet to the supporting structure requires a separate mounting means;

- the connection of metal rails through a metal stud forms a closed electrical circuit, which, in the event of possible short circuits in the circuit of any of the tires, leads to serious negative consequences.

The technical result from the use of the claimed utility model is to increase the assembly processability and performance of the tire holder.

The specified technical result is achieved by the following:

- insulators have two-level grooves, stepwise passing from a wide shallow to a less wide more recessed into the body of the insulator. This solution allows one insulator to cover a wide range of tire thicknesses of 5, 6, 8 and 10 mm. and thereby simplify the assembly technology, unify the complete set;

- the head of the bolt is laid in the insulator (and not the nut, as in the prototype), which greatly simplifies the positioning of the insulator to the rail;

- the holes in the rails for the tie rods are moved from the end sections to the gaps between the insulators, which ensures equal tire compression forces by all insulators;

- at least one of the nodes of the interface of each stud with a rail is equipped with a dielectric sleeve, which eliminates the electrical contact of the rails and the associated negatives;

- the length of the studs is selected with the condition that their upper ends go beyond the dimensions of the upper rail, which allows you to mount the busbar holder to the supporting structure of the NKU cabinet without special fixing means.

There are several busbar holders in a low-voltage package device (NKU): their number is determined by a number of parameters.

On the presented sketches one tire holder is shown:

figure 1 - tire holder for three tires;

figure 2 is a side view of figure 1 (by A);

figure 3 and 4 - two projection of the insulator on one or two tires;

figure 5 - projection of the insulator on two or three tires ;.

The tire holder contains two metal rails (sections of profile hire) bearing 1 and mounting 2, remotely fastened by means of threaded metal studs 3 with the possibility of oncoming movement of the rails; at least one of the nodes of the interface of each stud with a rail is equipped with a dielectric sleeve 4, electrically insulating the stud from the rail. On each rail insulators are distributed in a concentrated manner. There can be 2, 3, or 4 of them, depending on the design of the switchgear. The insulators are equipped with a bolt 6, the head of which is mounted in the body of the insulator as a embedded part. In the insulator, from the side opposite to the bolt exit, grooves 7 are made for the sizes of ribs (thicknesses) of the tires 8 in the amount of 1-6 longitudinal and transverse, of various depths in the insulator body. Figure 3, 4 shows an insulator with grooves 7 of step deepening.

The assembly technology of the tire holder is as follows. Insulators 5 are attached to the rails 1 and 2: the threaded end of the embedded bolt b is inserted into the holes of the rails, the washers are poured and tightened with a nut. In this case, the insulators are oriented with grooves corresponding to the tire size. Mount the studs 3 in the mounting rail 1 with the ends extending beyond the gauge of the rail for subsequent fixing in the NKU cabinet, equip the studs with dielectric bushings 4. Then, the mounting rail 2 is placed on the lower ends of the studs between the two nuts, the busbars are placed in the grooves 7 of the insulators of the mounting rail 2 8 with their ribs, they rotate the tires until their upper ribs are placed under the projection of the grooves of the upper insulators and tighten the lower nuts on the studs of rail 2, pull the latter to the upper rail 1 to the required tire fastening force.

Claims (1)

Tire holder of a low-voltage complete device (NKU), containing two parallel mutually arranged metal rails remotely fastened with screw studs with the possibility of rapprochement - sliding, insulators on each rail equipped with grooves for the ribs (side ends) of the tires and a bolt pair fixing element, by means of which the insulators are dispersedly attached to the rails, characterized in that the grooves in the insulator are made stepwise recessed with a decrease in the width of the more recessed holes in the rails for the studs placed in between the insulators, at least one of them (hole) in each rail is equipped with a dielectric sleeve, the upper ends of the studs protrude beyond the size of the upper rail with the possibility of fastening to the supporting structure of the NKU (cabinet), and embedded in the body of the insulator An element of a bolt pair is the bolt head.