Isolating switch body of railway traffic

Abstract

The invention discloses an isolating switch body of railway traffic, wherein in a moving contact component structure, a moving contact knife is welded on a conduction plate and mounted on a rotation shaft; a soft connection is formed by respectively fixing two ends which are overlapped by a plurality layers of strip-shaped copper sheets and bended to be U-shaped on a connecting plate; two soft connections are in bilateral symmetry and are fixed between the conduction plate and a T-shaped connecting plate. A static contact component structure is as follows: two locking rods are fixed on a contact knife splint; a plurality of unit clamp-shaped components are hung on the two locking rods; an I-shaped plate is arranged between two adjacent unit clamp-shaped components; the unit clamp-shaped component structure is as follows: two left contact fingers are overlapped and hung on a locking rod, two right contact fingers are overlapped and hung on the other locking rod, pits at external sides of the left and right contact fingers are respectively provided with a cylindrical pin, and a tension spring is hung on an annular groove of two cylindrical pins. The isolating switch body disclosed by the invention has the advantages of good heat dissipation, strong flowing capacity and long service life; and the isolating switch body is suitable for the occasions at which the rated voltage DC is 1800 V and the rated current is 4000 A.

Description

technical field [0001] The invention relates to an isolating switch, in particular to an isolating switch for a subway power supply line with a rated voltage of DC1800V and a rated current of 4000A. Background technique [0002] Chinese patent literature discloses a "large-diameter double-guided contact device for large DC isolating switches" (201110221952.2). The moving contact is a ring structure with a large diameter and good conductivity, and the static contact is composed of two inner and outer circles of contact fingers. After closing, the electrical contact is more reliable, and the flow capacity is larger. Its shortcoming is, one, the closing of moving contact and static contact can only be translation mode rather than moving contact rotation mode, for motor power, power transmission mechanism is more complicated, and energy consumption is bigger. Second, the static contact relies on the spring force of the inner and outer contact fingers to form a crimping force on...

AI Technical Summary

Problems solved by technology

The rotating shaft and the terminal board are hinged or directly hinged on the hinge seat. Therefore, in the case of overload, the electrical contact surface of this structure is small at the junction of the moving contact knife and the rotating shaft and at the hinge of the rotating shaft and the terminal board. less capable

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