CN201503798U

CN201503798U - Contact knife of isolating switch

Info

Publication number: CN201503798U
Application number: CN2009202234681U
Authority: CN
Inventors: 黄伟; 王建业; 付景安
Original assignee: Henan Senyuan Electric Co Ltd
Current assignee: Henan Senyuan Electric Co Ltd
Priority date: 2009-09-15
Filing date: 2009-09-15
Publication date: 2010-06-09
Anticipated expiration: 2019-09-15

Abstract

The utility model discloses a contact knife of an isolating switch. The contact knife (1) is a flat plate or a U-shaped groove plate, a plurality of long bulges (2) are arranged at the front end of the contact knife (1), a notch (3) is arranged at the front end of a plane of the contact knife (1), and the length of the notch (3) exceeds the long bulges (2). The long bulges on the contact knife are divided into four parts up and down by the notch (3). When in contact with other conductive components, the contact surface of each long bulge is changed into two from one in the past, thereby truly increasing the contact area. The contact knife has the characteristics of simple structure and easy processing.

Description

A kind of switch touching knife

Technical field

The utility model relates to a kind of isolating switch, particularly the contact knife of isolating switch.

Background technology

In the electric power power transmission and transformation system, isolating switch be realize deciliter, the visual plant of conversion line and assurance interruption maintenance safety.Contact knife is one of critical piece of isolating switch energising, and there is clear and definite, strict regulation in its temperature rise value country by rated current the time.So the quality of contact knife directly has influence on the electric property of isolating switch even the energising quality of whole piece circuit.The contact knife of existing GN19 isolating switch is the U-lag plate, and its front end has long protruding, and end has boss, and long protruding and boss is the contact site of other conductive component on contact knife and the isolating switch, and its contact performance belongs to contacting of " face and face ".The shortcoming of this contact knife is: the length of contact knife front end is protruding during with other parts overlap joint, since the restriction of machining accuracy, its long protruding all contact.Because " face of supported at three point ", so real contact-making surface mainly concentrates on three big " point groups ".When isolating switch during,, even burn switch and cause line outage because heating can appear in contact knife long protruding contact area inadequately by big electric current.

Summary of the invention

The purpose of this utility model is a kind of and big switch touching knife of other conductive component contact area of design.

The technical solution of the utility model is, a kind of switch touching knife, contact knife are flat board or U-lag plate, and front end has some length protruding, it is characterized in that, the contact knife flat front end is provided with a breach, and the length of breach surpasses long protruding.

The switch touching knife that the utility model provides, the breach of contact knife flat front end is divided into upper and lower four parts the some length on the contact knife are protruding, when contacting, become each long protruding two contact-making surface, increased real contact area by each original long protruding contact-making surface with other conductive component.Simple in structure, easily process, and increased the contact area of contact knife and other conductive component.

Description of drawings

Fig. 1 is the structural representation of existing switch touching knife;

Fig. 2 is the structural representation of an embodiment of the utility model switch touching knife.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Among the figure: 1, contact knife 2, long protruding 3, breach

In the embodiment shown in Figure 2, contact knife 1 is a U type frid, front end have two long protruding 2, U type frid flat front end is provided with a breach 3, the length of breach 3 surpasses long protruding 2.

Breach 3 is divided into upper and lower four parts to two on the contact knife 1 long protruding 2, when contacting with other conductive component, has become four contact-making surfaces by two original long protruding contact-making surfaces, has increased real contact area.

Claims

1. switch touching knife, contact knife (1) is flat board or U-lag plate, and front end has some length protruding (2), it is characterized in that: contact knife (1) flat front end is provided with a breach (3), and the length of breach (3) surpasses long protruding (2).