CN203055763U

CN203055763U - Loop self-locking load switch

Info

Publication number: CN203055763U
Application number: CN 201320083604
Authority: CN
Inventors: 何光元; 曾俊峰; 贺凯
Original assignee: GUIZHOU ZHONGQUAN ELECTRIC GROUP CO Ltd
Current assignee: ZHONGQIAN ELECTRIC GROUP
Priority date: 2013-02-25
Filing date: 2013-02-25
Publication date: 2013-07-10
Anticipated expiration: 2023-02-25

Abstract

The utility model discloses a loop self-locking load switch which comprises a conductive movable contact rod assembly, an upper contact assembly, a switch moving contact, a grounding static contact, an upper bus, a lower bus and a connecting lever, wherein the upper contact assembly is right above the upper end face of the conductive movable contact rod assembly, the conductive movable contact rod assembly when moves upwards contacts the upper contact assembly, the upper contact assembly is connected with the upper bus, the lower end face of the conductive movable contact rod assembly is connected with the switch moving contact, the conductive movable contact rod assembly when moves downwards contacts the grounding static contact, the switch moving contact is connected with the connecting lever which drives the conductive movable contact rod assembly to move, the lower bus is moveably connected with the conductive movable contact rod assembly, an earth switch rotatable about an end portion is arranged at one side of the grounding static contact, and the earth switch when rotates contacts the grounding static contact. The major loops of a grounding and a load switch are interlocked, which prevents simultaneous switching on of the grounding and the load switch, even if an outer mechanical linkage fails.

Description

A kind of loop self-locking on-load switch

Technical field

The utility model relates to a kind of for pressure power transmission and distribution switching device, especially a kind of loop self-locking on-load switch.

Background technology

Existing split type on-load switch, on-load switch and earthed switch are separate, can operate separately by mechanism separately, can not close a floodgate simultaneously in order to satisfy electrical load and ground connection, be to stop that by exterior mechanical interlocking the handle hole of two switches realizes, externally under the situation that mechanical interlocking lost efficacy, this moment, two switches all can be operated, as if human error this moment, on-load switch and earthed switch are closed a floodgate simultaneously, just the accident that is short-circuited, the safety that jeopardizes equipment and personnel, influence power supply.

Summary of the invention

At the deficiencies in the prior art part, the utility model aims to provide a kind of loop self-locking on-load switch, guarantee the major loop of earthed switch and on-load switch is interlocked, even the exterior mechanical interlocking lost efficacy, still can satisfy electric five anti-requirements between the major loop, stop earthed switch and on-load switch closes a floodgate simultaneously.

For solving the problems of the technologies described above, the technical solution adopted in the utility model: a kind of loop self-locking on-load switch, comprise conduction movable feeler lever assembly, the upper contact head assembly, switch movable contact, the ground connection fixed contact, Up Highway UHW, Down Highway, connecting lever, the upper contact head assembly is positioned at over against the top of conduction movable feeler lever assembly upper surface, when moving up, conduction movable feeler lever assembly contacts with the upper contact head assembly, the upper contact head assembly connects with Up Highway UHW, conduction movable feeler lever assembly lower surface connects switch movable contact, switch movable contact contacted with the ground connection fixed contact when conduction movable feeler lever assembly moved down, switch movable contact and the connecting lever hinge-coupled that drives the motion of conduction movable feeler lever assembly, Down Highway and movable connection of conduction movable feeler lever assembly, also be provided with the ground connection cutter that can rotate around end points in the first side of ground connection stationary contact, can contact with the ground connection fixed contact when ground connection cutter clockwise rotates.

Adopt above-mentioned switch, rotate counterclockwise connecting lever, conduction movable feeler lever assembly moves down, the on-load switch separating brake, and separating brake is finished in on-load switch moving contact and the combination of ground connection fixed contact;

In this process, if clockwise rotate the ground connection cutter, ground connection cutter and the combination of ground connection fixed contact, Down Highway ground connection at this moment.

In this process, if rotate counterclockwise the ground connection cutter, the ground connection cutter separates with the ground connection fixed contact, and Down Highway ground connection is separated.

Clockwise rotate connecting lever, conduction movable feeler lever assembly moves up, and switch movable contact moves upward, and separates with the ground connection fixed contact, and being combined with the upper contact head assembly in conduction movable feeler lever assembly upper end, finishes combined floodgate;

In this process, if on-load switch separating brake not, the same current potential of last Down Highway, all have high pressure, after mechanical interlocking lost efficacy, even the ground connection cutter closes, because switch movable contact does not contact with the ground connection fixed contact, the whole piece bus does not still have ground connection, and charged ground short circuit fault can not take place.

If the ground connection cutter is in "on" position, Down Highway ground connection, this moment, conduction movable feeler lever assembly moved up if close on-load switch, and the on-load switch moving contact separates Down Highway with the ground connection fixed contact, charged ground short circuit fault can not take place yet.

In sum, the utility model is interlocked the major loop of earthed switch and on-load switch, even the exterior mechanical interlocking lost efficacy, still can satisfy five anti-requirements between the major loop, stops the situation generation that earthed switch and on-load switch close a floodgate simultaneously.

Description of drawings

Fig. 1 is the utility model structural representation;

In the accompanying drawing: 12 times Mume flower contact 13 pistons of Mume flower contact on 1 conduction movable feeler lever assembly, 2 upper contact head assemblies, 3 switch movable contacts, 4 Up Highway UHWs, 5 Down Highways, 6 ground connection fixed contacts, 7 connecting levers, 8 ground connection cuttves, 9 insulating support A, the 10 insulating support B 11.

Embodiment

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

As shown in Figure 1, conduction movable feeler lever assembly 1 vertically is arranged on the switch cabinet, has piston 13 in conduction movable feeler lever assembly 1 upper end, and when conduction movable feeler lever assembly 1 moved up, this piston 13 contacted with last Mume flower contact 11 on the upper contact head assembly 2; The conduction contact that last Mume flower contact 11 is upper contact head assemblies 2 has following Mume flower contact 12 in the lower end of conduction movable feeler lever assembly 1, and following Mume flower contact 12 connects with Down Highway 5 by electric conducting material, and namely Down Highway 5 is in on-state with conduction movable feeler lever assembly 1; Down Highway 5 is fixed on the switch cubicle by insulating support B10, upper contact head assembly 2 is positioned at over against the top of conduction movable feeler lever assembly 1 upper surface, conduction movable feeler lever assembly 1 lower surface connects switch movable contact 3, switch movable contact 3 contacted with ground connection fixed contact 6 when conduction movable feeler lever assembly 1 moved down, ground connection fixed contact 6 is fixed on the switch cubicle by insulating support A9, switch movable contact 3 and connecting lever 7 hinge-coupled that drive 1 motion of conduction movable feeler lever assembly, certainly, connecting lever 7 is provided with for the handle that rotates connecting lever 7, also be provided with ground connection cutter 8 in ground connection fixed contact 6 one sides, ground connection cutter 8 one end hinge-coupled are on switch cubicle, ground connection cutter 8 can rotate around the end points hinge, contact with ground connection fixed contact 6 when ground connection cutter 8 clockwise rotates, separate with ground connection fixed contact 6 when ground connection cutter 8 rotates counterclockwise.

Claims

1. loop self-locking on-load switch, comprise conduction movable feeler lever assembly (1), upper contact head assembly (2), switch movable contact (3), ground connection fixed contact (6), Up Highway UHW (4), Down Highway (5), connecting lever (7), it is characterized in that: upper contact head assembly (2) is positioned at over against the top of conduction movable feeler lever assembly (1) upper surface, conduction movable feeler lever assembly (1) contacts with upper contact head assembly (2) when moving up, upper contact head assembly (2) connects with Up Highway UHW (4), conduction movable feeler lever assembly (1) lower surface connects switch movable contact (3), the conduction movable feeler lever assembly (1) when moving down switch movable contact (3) contact with ground connection fixed contact (6), switch movable contact (3) and connecting lever (7) hinge-coupled that drives conduction movable feeler lever assembly (1) motion, Down Highway (5) connects with conduction movable feeler lever assembly (1) is movable, also be provided with the ground connection cutter (8) that can rotate around end points in ground connection fixed contact (6) one sides, contact with ground connection fixed contact (6) when ground connection cutter (8) rotates.