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Direct current isolation switch for rail transit

A DC isolation switch, rail transit technology, applied in air switch parts and other directions, can solve the problem of lack of mechanical and electrical self-locking functions, and achieve perfect mechanical and electrical interlocking functions, large current capacity, and strong heat dissipation capacity. Effect

Active Publication Date: 2012-07-04
CHENGDU ZHONGGONG ELECTRIC ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device has a manual operation mode as well as a locking mode, lacking mechanical and electrical self-locking functions

Method used

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  • Direct current isolation switch for rail transit
  • Direct current isolation switch for rail transit
  • Direct current isolation switch for rail transit

Examples

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Embodiment Construction

[0078] Figure 49 ~ Figure 52 Middle, 101, moving contact; 102, soft connection; 103, bolt; 104, washer; 105, spring washer; 106, wiring board; 107, pin; 108, absolute and rotating shaft; 109, pin; 110, copper sleeve; 111, washer; 112, retaining ring; 113, bolt; 114, washer; 115, spring washer; 116, insulator; 117, bolt; 118, insulator; 119, retaining ring; 120, insulator; 121, conductive plate.

[0079] The invention is suitable for rated voltage DC1800V and rated current 4000A.

[0080] The moving contact knife assembly (that is, the moving contact knife mechanism) is composed of moving contact knife, soft connection, wiring board, insulating shaft, insulator and other components. Figure 49 ~ Figure 52 It shows the movable contact knife mechanism of the isolating switch: the movable contact knife 101 installed on the rotating shaft, and the terminal board 106 are in the shape of "T"; the movable contact knife 101 is welded on the conductive plate 121 to form the movable co...

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Abstract

The invention discloses a direct current isolation switch for a rail transit. The direct current isolation switch consists of a direct current isolation switch body and an operating mechanism thereof, wherein the switch body consists of a moving contact component and a fixed contact component; the moving contact component mainly comprise a moving contact cutter and two flexible connections which are formed by stacking and bending a plurality of layers of copper sheets and fixed between a conductive plate and a wire connection plate; the fixed contact component mainly comprises a plurality of unit pincerlike structures suspended on two locking rods; each unit pincerlike element consists of two left contact fingers, two right contact fingers, a cylindrical pin and a tension spring; the operating mechanism consists of a direct current motor, a worm wheel speed reducer, a switch-on and switch-off locking structure, a mode selection mechanism, a mode electric interlock mechanism and the like; and a gear on a manual transmission shaft is meshed with or separated from a gear on the other input shaft of the worm wheel speed reducer. The direct current isolation switch is integrated with three operating modes, namely a locking mode, a manual mode and an electric mode, has complete mechanical and electric interlock performance, and is suitable for occasions, on which the rated voltage is direct current (DC) 1,800V and the rated current is 4,000A.

Description

technical field [0001] The invention relates to an isolating switch and an operating mechanism thereof, in particular to an isolating switch for a subway power supply line with a rated voltage of DC1800V and a rated current of 4000A and an isolating switch operating mechanism with mechanical and electrical interlock protection. 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 i...

Claims

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Application Information

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IPC IPC(8): H01H31/02
Inventor 魏以德王斌钟剑
Owner CHENGDU ZHONGGONG ELECTRIC ENG
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