CN202550287U

CN202550287U - Contact box

Info

Publication number: CN202550287U
Application number: CN2012201985365U
Authority: CN
Inventors: 叶绿野
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-22
Filing date: 2012-04-22
Publication date: 2012-11-21
Anticipated expiration: 2022-04-22

Abstract

The utility model relates to a contact box, which comprises an insulating cylinder with an open bottom and a closed top. A through groove for a bus bar is radially arranged on the circumferential wall of the insulating cylinder at a position adjacent to the top. The through groove is communicated with the cavity of the insulating cylinder. An insulating rubber cover is sheathed at the opening of the through groove, and is provided with a sheathing part and a bearing part which perpendicularly extends inward along the edge of one end of the sheathing part. The bearing part partially protrudes out of the edge end surface of the opening of the through groove. Since the insulating rubber cover is arranged at the inlet of the bus bar and the bearing part of the insulating rubber cover partially protrudes out of the edge end surface of the opening of the through groove, when the bus bar is inserted into the contact box, the bearing part of the insulating rubber cover is in close fit with the bus bar, and the electric arc produced by contacts during action can be effectively prevented from discharging through an air gap between the bus bar and the through groove.

Description

A kind of contact box

Technical field

The utility model relates to a kind of and the matching used annex of power equipment, relates in particular to a kind of contact box that is widely used in switch cubicle.

Background technology

As everyone knows; Contact box is applied on the contact of high and low pressure switch cubicle widely; The electric arc that produces when contact is worked has excellent shielding effect, and in actual the use, often the junction of the installation cooperation place of contact box and base and busbar and contact box is often because exist the air gap; Therefore cause the electric discharge phenomena in gap easily, to other the certain influence of power equipment generation on every side.

Summary of the invention

The purpose of the utility model is to overcome the defective of prior art, provides a kind of simple in structure, and can effectively prevent the contact box of gap discharge.

For realizing above-mentioned purpose; The utility model adopts a kind of contact box; Comprise that the opening-like attitude in bottom, a top are the insulating cylinder body of closed state; On the perisporium of this insulating cylinder body, radially offer a groove that is used for busbar near the position at top, this groove is communicated with the inner chamber of insulating cylinder body, and the opening part of said groove is socketed with an electro-insulating rubber cover; This electro-insulating rubber cover has socket part and the vertical pressure-bearing portion of extending inwards of one end margin along the socket part, the edge end face of the said groove opening of protrusion of this pressure-bearing portion part.

Concrete, the relative one side of inlet wire direction of said pressure-bearing portion and said busbar is provided with lozenges.

Preferably, be provided with a plurality of diffusing skirts on the inner and outer wall of said insulating cylinder body.

Through above-mentioned improvement to prior art, owing to be provided with the electro-insulating rubber cover in the import department of busbar, and the edge end face of the said groove opening of protrusion of the pressure-bearing portion part that has of this electro-insulating rubber cover; Therefore, when busbar injected contact box, the pressure-bearing portion and the busbar of said electro-insulating rubber cover pressed applying; Can effectively protect the phenomenon that the electric arc of avoiding contact when action to produce discharges through the air gap between busbar and the groove, in addition, through the setting of lozenges in the pressure-bearing portion; When having alleviated busbar reeve groove; This pressure-bearing portion makes busbar can inject the inner chamber of insulating cylinder body easily through groove, and is electrically connected with the fixed contact formation that is arranged on this inner chamber the resistance of busbar; At last; Through as much as possible on the inner and outer wall of insulating cylinder body diffusing skirt is set, effectively increased creepage distance especially, more safe and reliable.

Description of drawings

Fig. 1 is the utility model embodiment front view.

Fig. 2 is the front view that removes the electro-insulating rubber cover among Fig. 1.

Fig. 3 is the enlarged drawing at A place among Fig. 1.

Embodiment

Like Fig. 1, Fig. 2, shown in Figure 3; The specific embodiment of the utility model is a kind of contact box; Comprise that the opening-like attitude in bottom, a top are the insulating cylinder body 1 of closed state; On the perisporium of this insulating cylinder body 1, radially offer a groove 10 that is used to admit busbar near the position at top, this groove 10 is communicated with the inner chamber of insulating cylinder body 1, and opening 100 places of said groove 10 are socketed with an electro-insulating rubber cover 2; This electro-insulating rubber cover 2 has socket part 20 and the vertical pressure-bearing portion 21 of extending inwards of 20 1 end margins along the socket part; The edge end face 1000 of said groove 10 openings 100 of the protrusion of these pressure-bearing portion 21 parts, and and combine Fig. 3 to know, this pressure-bearing portion 21 is provided with lozenges 210 with the relative one side of inlet wire direction of said busbar.

Also obviously can know in conjunction with Fig. 1 and Fig. 2, be provided with a plurality of diffusing skirts 11 on the inner and outer wall of said insulating cylinder body 1.

More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The protection range that the utility model requires defines according to appended claim and equivalent thereof.

Claims

1. contact box; Comprise that the opening-like attitude in bottom, a top are the insulating cylinder body of closed state; On the perisporium of this insulating cylinder body, radially offer a groove that is used for busbar near the position at top; This groove is communicated with the inner chamber of insulating cylinder body; It is characterized in that: the opening part of said groove is socketed with an electro-insulating rubber cover, and this electro-insulating rubber cover has socket part and the vertical pressure-bearing portion of extending inwards of one end margin along the socket part, the edge end face of the said groove opening of protrusion of this pressure-bearing portion part.

2. a kind of contact box according to claim 1 is characterized in that: the relative one side of inlet wire direction of said pressure-bearing portion and said busbar is provided with lozenges.

3. a kind of contact box according to claim 1 and 2 is characterized in that: be provided with a plurality of diffusing skirts on the inner and outer wall of said insulating cylinder body.