Insulating sleeve

Abstract

The utility model relates to the structural elements of a main distribution busbar trunking system, and in particular to the design of a connecting / joining unit for a main distribution busbar trunking system. The technical result consists in creating a reliable and easy-to-install and operate connecting unit for a main distribution busbar trunking system using an insulating sleeve that ensures secure fixation of the component parts and prevents their displacement during installation on the busbar trunking system. For this purpose, the insulating sleeve is made of two half-bushings, partially inserted into each other. Each half-bushing comprises an end surface, side surfaces, and a through hole. The side surfaces of one half-bushing are provided with oblong projections, while the other half-bushing has matching through grooves. 2 cl., 2 fig.

Description

[0001] The utility model relates to the structural elements of a main distribution busbar, in particular to the design of a connecting / joining block of a main distribution busbar.

[0002] A docking unit / assembly for a main busbar trunking system is known from the prior art [RU 174019, IPC H02G 5 / 00, Published: 26.09.2017 Bulletin No. 27], comprising a connection of busbars of a first section with busbars of a second section by overlapping, wherein the busbars are pressed against each other by fastening caps and a bolt with nuts, wherein the docking area of ​​each busbar has three parts - a main part, a horizontal part at the level of half the busbar cut and two additional parts: an inclined part at the base and an inclined part at the end of the docking area, wherein on each busbar the docking areas of the first section mirror the docking areas of the second section and these two areas are compressed with each other. In the docking area between the busbars, thin solid insulating plates are installed and an axial central slot is made through which a tube made of insulating material passes.

[0003] The main disadvantages of this technical solution are:

[0004] - complexity of installation / dismantling, caused by the need to align the connecting busbars of the busbar, the mounting cover and the bolt with the nut;

[0005] - mechanical stresses arising when tightening the bolt may lead to the formation of cracks and the occurrence of residual deformation, leading to insulation failure;

[0006] - temperature deformations (for example, when the tires are heated (operating mode), the insulating tube and contact plates expand at different rates), which can cause jamming, microcracks and loss of centering.

[0007] Also known from the prior art is a connecting block / kit for a main busbar [KR100958487 "Joint Kit Being Compactable For Bus Duct", IPC H02G5 / 04, published 2010-05-17], comprising a housing (310) having through holes and supporting conductors (340), a plurality of plate-shaped insulating plates (320) made of insulating material, a plurality of conductors (340) placed on one or both sides of the insulating plate (320), having a through hole (340a) and made in the form of a plate, a plurality of insulating rings (350) formed between the conductors (340) and made of insulating material, a bolt (305) passing through the through hole in the insulating sleeve and a nut (303) screwed on the bolt (305). The insulating sleeve is located between the insulating plate (320), the conductor (340) and the bolt (305) and is made of a half-sleeve (370), partially inserted into the half-sleeve (360).

[0008] This technical solution is selected as a prototype for the claimed utility model.

[0009] The main disadvantages of this technical solution are:

[0010] - low reliability of the insulating sleeve design;

[0011] - temperature deformations;

[0012] - the probability of displacement of the component parts of the busbar connection block during assembly operations, caused by the possibility of rotation of the half-bushings relative to each other.

[0013] The problem that the claimed utility model is aimed at solving is the development of a connecting block for a main busbar with an insulating sleeve that ensures reliable fixation of the component parts and prevents their displacement during assembly (mounting on the busbar).

[0014] The technical result of using the claimed utility model consists in creating a reliable and easy-to-install and operate connecting block for a main busbar, which eliminates the shortcomings inherent in the previous level of technology.

[0015] The stated problem is solved, and the claimed technical result is achieved by the fact that the insulating bushing, intended for installation in the connecting block of the main distribution busbar, is made of two half-bushings, partially inserted into each other, each half-bushing contains an end surface, side surfaces and a through hole, while on the side surfaces of one half-bushing there are oblong projections, and on the side surfaces of the other half-bushing there are mating through grooves.

[0016] The oblong protrusions have a rectangular cross-sectional profile.

[0017] Half bushings are made of ABS plastic.

[0018] The essence of the claimed solution is explained graphically by the material:

[0019] Fig. 1 - Connection block of the main distribution busbar (with partial cutout);

[0020] Fig. 2 - Insulating bushing (disassembled view).

[0021] The connection block (1) for the main and distribution busbar is designed to connect busbar sections (not shown in the figures) for power transmission and distribution, ensuring reliable electrical contact and insulation between them. The device can also serve as a connection point for branches (power take-off boxes), allowing for the creation of long main lines or branching of power supply without dismantling the main sections.

[0022] The connecting block (1) comprises a housing consisting of insulating plates (2), a plurality of conductive plates (3) located on one or both sides of the insulating plate (2) having a through hole (not indicated in the drawings), a plurality of insulating rings (5) installed between the conductive plates (3) and a nut-and-screw fastening element (4), the bolt of which passes through the insulating sleeve (6).

[0023] The insulating sleeve (6) in the connecting block is located between the insulating plate (2), the conductive plate (3) and the bolt of the fastening element.

[0024] The insulating bushing (6) is made of two half-bushings (6.1, 6.2) partially inserted into each other. Each half-bushing (6.1, 6.2) contains an end surface (6.1.1, 6.2.1), side surfaces (6.1.2, 6.2.2) and a through hole (6.1.3, 6.2.3).

[0025] On the side surfaces (6.1.2) of the half-sleeve (6.1), oblong projections (6.1.4) are made, and on the side surfaces (6.2.2) of the half-sleeve (6.2), mating through grooves (6.2.4) are made.

[0026] The oblong projections (6.1.4) on the side surfaces (6.2.2) of the half-bushing (6.1) have a rectangular cross-sectional profile.

[0027] Half bushings (6.1, 6.2) can be made of ABS plastic.

[0028] Example of implementation of the utility model.

[0029] The connecting block (1) comprises a housing consisting of insulating plates (2), a plurality of conductive plates (3) located on one or both sides of the insulating plate (2) having a through hole (not indicated in the drawings), a plurality of insulating rings (5) installed between the conductive plates (3) and a nut-and-screw fastening element (4), the bolt of which passes through the insulating sleeve (6).

[0030] The insulating sleeve (6) in the connecting block is located between the insulating plate (2), the conductive plate (3) and the bolt of the fastening element.

[0031] The insulating bushing (6) is made of two half-bushings (6.1, 6.2) partially inserted into each other. Each half-bushing (6.1, 6.2) contains an end surface (6.1.1, 6.2.1), side surfaces (6.1.2, 6.2.2) and a through hole (6.1.3, 6.2.3).

[0032] On the side surfaces (6.1.2) of the half-sleeve (6.1), oblong projections (6.1.4) are made, and on the side surfaces (6.2.2) of the half-sleeve (6.2), mating through grooves (6.2.4) are made.

[0033] The oblong projections (6.1.4) on the side surfaces (6.1.2) of the half-bushing (6.1) have a rectangular cross-sectional profile.

[0034] Half bushings (6.1, 6.2) are made of ABS plastic.

Claims

1. An insulating bushing intended for installation in a connecting block of a main distribution busbar, made from two half-bushings partially inserted into each other, wherein each half-bushing contains an end surface, side surfaces and a through hole, characterized in that on the side surfaces of one half-bushing there are oblong projections, and on the side surfaces of the other half-bushing there are matching through grooves.

2. An insulating bushing according to paragraph 1, characterized in that the elongated projections have a rectangular cross-sectional profile.

3. An insulating bushing according to paragraph 1, characterized in that the half bushings are made of ABS plastic.

Images