CN2415445Y

CN2415445Y - Contact arc extinguishing device for low-capacity contactor

Info

Publication number: CN2415445Y
Application number: CN 00210546
Authority: CN
Inventors: 邱祖述; 倪树春
Original assignee: DONGDA ELECTROTECHNOLOGY Co Ltd HARBIN; SHANGHAI ELECTRIC APPLIANCE SCI INST
Current assignee: Harbin Dongdagao New Material Co.,Ltd.
Priority date: 2000-01-08
Filing date: 2000-01-08
Publication date: 2001-01-17
Anticipated expiration: 2010-01-08

Abstract

The utility model relates to a contactor, particularly is an arc extinguishing device for a low-capacity contactor. The utility model is characterized in that the top of a U-shaped sheet 3 is provided with a semicircular groove 19; a rubber tube 2 is arranged in the semicircular groove 19; a cover 4 is pressed on the rubber tube 2; the U-shaped sheet 3 is tightly fixed on an arc extinguishing cover; the width of a buffer zone is from 6.50 mm to 7.50 mm. the utility model has the advantages of high strength, difficult break, convenient assembly and disassembly and zero flashover. The contact is made of copper base without silver alloy.

Description

Low capacity probe of contactor arc-control device

The utility model relates to contactor, is specially a kind of low capacity contactor arc control device.

At present, many longitudinal joints of a large portion potter's clay arc-extinguish chamber is still arranged at home, the silver-base alloy contact.Produce electric arc during the probe of contactor disjunction, electric arc enters longitudinal joint, and it is free and extinguish to be subjected to cooling.No doubt price is low for this potter's clay arc-control device, but mechanical strength is low, and very easily broken in transportation and the use, use is absolutely unsafe, and arc extinction performance is relatively poor, and flashover distance is big.

The purpose of this utility model is to provide a kind of intensity height, is difficult for fragmentation, easy accessibility, the low capacity probe of contactor arc-control device of realization zero arcing.

The purpose of this utility model is achieved in that semi-circular groove 19 is arranged at the top of U matrix 3, rubber tube 2 is housed in the semi-circular groove 19, lid 4 is pressed on the rubber tube 2, U matrix 3 tightly is fixed on the arc-extinguish chamber 1, the hook 18 of lid 4 leans on elastic hook on the fixedly muscle 20 of arc-extinguish chamber 1, make U matrix 3, arc-extinguish chamber 1, cover 4 threes need not be any the overall structure that connects of screw, space between arc-extinguish chamber 1 and hook 18 is a buffering area 8, in the zone that U matrix 3 surrounds, be service area 9, on the muscle of arc-extinguish chamber 1 porose 5, relief hole 17 is arranged on U matrix 3, have through hole 6 at an end of arc-extinguish chamber 1, the buffering area width is 6.50-7.50mm.

Advantage of the present utility model is simple in structure, and the intensity height is difficult for fragmentation, and easy accessibility is realized zero arcing.

Fig. 1 is the utility model structural principle generalized section.

Fig. 2 partly cuts open schematic diagram for the structural principle of the utility model arc-extinguish chamber and rubber tube 2, U matrix 3, lid 4 building blocks.

Fig. 3 looks schematic diagram for the utility model U matrix structural principle master.

Fig. 4 is the utility model U matrix structural principle schematic side view.

Fig. 5 is the utility model U matrix structural principle schematic top plan view.

Below in conjunction with accompanying drawing in detail the utility model most preferred embodiment is described in detail: semi-circular groove 19 is arranged at the top of U matrix 3, rubber tube 2 is housed in the semi-circular groove 19, lid 4 is pressed on the rubber tube 2, U matrix 3 tightly is fixed on the arc-extinguish chamber 1, the hook 18 of lid 4 leans on elastic hook on the fixedly muscle 20 of arc-extinguish chamber 1, make U matrix 3, arc-extinguish chamber 1, cover 4 threes need not be any the overall structure that connects of screw, space between arc-extinguish chamber 1 and hook 18 is a buffering area 8, in the zone that U matrix 3 surrounds, be service area 9, on the muscle of arc-extinguish chamber 1 porose 5, relief hole 17 is arranged on U matrix 3, have through hole 6 at an end of arc-extinguish chamber 1, the buffering area width is 6.50-7.50mm.7 is contact, and 11 is the stationary contact bridge.Arc-extinguish chamber 1 is plastic products, and lid 4 is the rubber-like plastic products.U matrix 3 is used the rigid material goods.Two breakpoints of the every phase of contactor, two the U matrix 3 of packing into, produce electric arc during the probe of contactor disjunction, the suction that utilizes U matrix 3 to produce, make electric arc contact 7 surfaces that speed away, enter the service area 9 that U matrix 3 surrounds, when electric arc is run into U matrix 3, utilize " near cathode effect " of current over-zero and extinguish rapidly.Two U matrix 3 of every phase are inserted the plastics arc-extinguish chamber 1 from top, the top of U matrix 3 has semi-circular groove 19, wherein place rubber tube 2, lid 4, insert the plastics arc-extinguish chamber 1 from top, compressing rubber pipe 2, the hook 18 of lid 4 is hooked on the arc-extinguish chamber 1, thereby makes U matrix 3, arc-extinguish chamber 1, lid 4 form overall structure by means of elasticity, need not any screw, assembly and disassembly is all very convenient.The service area 9 in the middle of arc-extinguish chamber 1 every phase can be divided into and the buffering area 8 of both sides, porose therebetween 5, the top of each U matrix 3 has relief hole 17, communicate with the hole 5 of arc-extinguish chamber 1, when the contactor disjunction, produce electric arc on the contact 7, electric arc and free gas enter buffering area 8 by service area 9 in this hole and further cool off, thermal current is selected through arc-extinguish chamber 1 top air vent hole 6, enter atmosphere, to reduce the temperature in the utility model, electric arc and free gas can directly not spray from the utility model, thereby have accomplished no arcing.The utility model course of work is: when the solenoid 12 of contactor passes to Control current, upper armature 13 drives contact and supports 14 under magneticaction, movable contact bridge 10 moves downward, contact 7 to stationary contact bridge 11 contacts, be switched on the external circuit that screw 15 connects this moment, reaches the purpose of connecting circuit.When solenoid 12 electric currents out of hand of contactor, armature 13 moves upward in the reaction of back-moving spring 16, supports 14 movable contact bridges 10 to move upward thereby drive contact, and so far dynamic/static contact 10 separately reaches the purpose of open circuit.This contact is the copper-based non-silver alloy contact.

Claims

1, a kind of low capacity probe of contactor arc-control device, it is by arc-extinguish chamber 1, rubber tube 2, U matrix 3, lid 4, hole 5, air vent hole 6, relief hole 17 constitutes, it is characterized in that: semi-circular groove 19 is arranged at the top of U matrix 3, rubber tube 2 is housed in the semi-circular groove 19, lid 4 is pressed on the rubber tube 2, U matrix 3 tightly is fixed on the arc-extinguish chamber 1, the hook 18 of lid 4 leans on elastic hook on the fixedly muscle 20 of arc-extinguish chamber 1, make U matrix 3, arc-extinguish chamber 1, cover 4 threes need not be any the overall structure that connects of screw, space between arc-extinguish chamber 1 and hook 18 is a buffering area 8, in the zone that U matrix 3 surrounds, be service area 9, on the muscle of arc-extinguish chamber 1 porose 5, relief hole 17 is arranged on U matrix 3, have through hole 6 at an end of arc-extinguish chamber 1.

2, low capacity probe of contactor arc-control device according to claim 1, it is characterized in that: the buffering area width is 6.50-7.50mm.