CN2278271Y

CN2278271Y - Circuit breaker with mechanical interlocking protector

Info

Publication number: CN2278271Y
Application number: CN 96216619
Authority: CN
Inventors: 王铁镰; 王津先; 刘俊才; 孟宝
Original assignee: COMPLETE SET FACTORY TIANJIN LOW VOLTAGE ELECTRIC APPLIANCES
Current assignee: COMPLETE SET FACTORY TIANJIN LOW VOLTAGE ELECTRIC APPLIANCES
Priority date: 1996-06-21
Filing date: 1996-06-21
Publication date: 1998-04-08
Anticipated expiration: 2006-06-21

Abstract

The utility model relates to a circuit breaker with a mechanical joint protector. The utility model is mainly characterized in that more than two steel wire brake lines are respectively installed on handles and positioning seats, and the handles and the positioning seats are fixedly installed on more than two circuit breakers, wherein the outlet end of one of the steel wire brake lines is connected with a baffle plate through the positioning seats on the circuit breaker on which the steel wire brake line is arranged; the outlet ends of the rest steel wire brake lines are respectively installed in a guide sleeve through compression springs on the other circuit breakers and are connected with a crown bar installed in the guide sleeve on each circuit breaker. The utility model has the advantages of broad application range and safe and reliable use; the mechanical joint protector which is additionally installed not only has simple structure but also can realize mechanical interlock at any position.

Description

The circuit breaker that has the mechanical interlocking protective device

The utility model belongs to H01H circuit breaker class technology, particularly relates to a kind of circuit breaker that has the mechanical interlocking protective device.

At present known used circuit breaker is thrown mutually and is not all had the mechanical interlocking protective device, so it can not be applied on the critical facility, in case otherwise electrical equipment interlocking when being out of order be short-circuited at a circuit, cause unpredictable consequence.In addition, known mutual throwing A.C. contactor, though it has the mechanical interlocking protective device, the A.C. contactor breaking current is little, under big current applications, has limited its scope of application.

The purpose of this utility model is to overcome the deficiency in the known technology and provides a kind of scope of application the wide and safe and reliable circuit breaker that has the mechanical interlocking protective device.

The purpose of this utility model is achieved in that

On circuit breaker, add the mechanical interlocking protective device, having structure is more than two, comprise on every circuit breaker of two and all install mechanical interlocking protective device additional, its concrete structure is, on the shell body of circuit breaker, install handle and limit base, by handle and limit base the steel wire brake cable is housed, the radical of steel wire brake cable is equal to the platform number of circuit breaker, on the shell body of circuit breaker, also install base plate and support, install datum plate on the support therein, install baffle plate and limit base on the datum plate, between an end of the plate end of datum plate and baffle plate extension spring is housed, the other end of baffle plate also is equipped with backstop; Install guide pin bushing on the base plate therein, pass through wherein one the exit that handle and limit base be equipped with the steel wire brake cable and on circuit breaker own, connect with baffle plate above-mentioned by limit base, the exit of remaining every steel wire brake cable is packed in the guide pin bushing by the stage clip on every other circuit breaker respectively, and with every circuit breaker on guide pin bushing in the push rod of packing into link.

Advantage and the good effect that the utlity model has are:

More than two, comprise all install mechanical interlocking protective device additional on every circuit breaker of two after, not only applied range but also safe and reliable.The mechanical interlocking protective device that installs additional in addition, not only simple in structure, and can both realize mechanical interlocking in any position.

The utility model has following accompanying drawing:

Fig. 1 is the utility model structural representation;

Fig. 2 is an example structure schematic diagram of the present utility model.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

More than two, comprise that all adding the mechanical interlocking protective device on every circuit breaker of two constitutes the mechanical interlocking protection of throwing mutually, the platform of circuit breaker is several to be decided according to needs.The mechanical interlocking that present embodiment is only selected for use two circuit breakers to constitute and thrown is mutually protected; concrete structure constitutes; referring to Fig. 1 and Fig. 2; on the shell body 13 of circuit breaker N that all has trip push button 6 and circuit breaker R, install handle 5 and limit base 15 respectively; by handle and limit base steel wire brake cable 1 is installed, two steel wire brake cable A, A ' and B, B ' promptly respectively are housed on circuit breaker N and circuit breaker R.On the shell body of circuit breaker N and circuit breaker R, also all install base plate 10 and support 14 in addition respectively, on the support of circuit breaker N and circuit breaker R, install datum plate 12, install baffle plate 7 and limit base 11 on each datum plate again, by the plate end of datum plate and an end of baffle plate extension spring 8 is housed respectively, the other end of baffle plate respectively is equipped with backstop 9.After installing guide pin bushing 2 respectively on the base plate of circuit breaker N and circuit breaker R, the exit that is contained in the steel wire brake cable A on the circuit breaker N is connected with baffle plate 7 by the limit base 11 on the circuit breaker N own; And the exit that will be contained in the steel wire brake cable A ' on the circuit breaker N packs in the guide pin bushing by the stage clip of circuit breaker R, and with the guide pin bushing of circuit breaker R in the push rod 4 of packing into link.The exit that in like manner will be contained in the steel wire brake cable B on the circuit breaker R connects with baffle plate 7 by the limit base 11 on the circuit breaker R own; The exit of steel wire brake cable B ' on the circuit breaker R is packed into by the stage clip of circuit breaker N in the guide pin bushing, and also with the guide pin bushing of circuit breaker N in the push rod of packing into link.

Operating principle of the present utility model is: when circuit breaker N and circuit breaker R all are in " branch " position, handle on each circuit breaker is strained the steel wire brake cable, meanwhile steel wire brake cable A on the circuit breaker N and the steel wire brake cable B on the circuit breaker R strain baffle plate 7 by limit base 11, because backstop 9 location, then baffle plate blocks the hole of the trip push button on the circuit breaker 6, steel wire brake cable A ' on same circuit breaker N and the circuit breaker R, B ' overcomes stage clip 3 by limit base 15 pressure is pulled upwardly push rod 4 in guide pin bushing 2, the trip push button on push rod and the circuit breaker keeps a segment distance.When normal power supply, circuit breaker N " closes " lock, and the steel wire brake cable A, the A ' that connect with handle unclamp, because steel wire brake cable A on the circuit breaker N and the baffle plate 7 on the circuit breaker own link, therefore circuit breaker N baffle plate is drawn back by extension spring 8, and the trip push button on the circuit breaker N exposes.In addition, steel wire brake cable A ' on the circuit breaker N and the push rod on the circuit breaker R connect, and then steel wire brake cable A ' is loosening, because the effect of stage clip, push rod moves down, and its front end is pressed on the baffle plate of circuit breaker R.If this moment is because certain accidental cause causes circuit breaker R " to close " lock, then steel wire brake cable B, B ' unclamp, at this moment owing to the baffle plate on the circuit breaker R connects with steel wire brake cable B, baffle plate on the circuit breaker R is by extension spring pulling displacement, and the trip push button on the circuit breaker R exposes, but the push rod on the circuit breaker R has been pressed on the baffle plate, the baffle plate displacement, again because the effect of stage clip, the push rod on the circuit breaker R is pressed in rapidly on the trip push button on the circuit breaker R, then circuit breaker R do not close a floodgate before tripping.Simultaneously, because the push rod on steel wire brake cable B ' and the circuit breaker N connects, then steel wire brake cable B ' is loosening, cause the push rod on the circuit breaker N to be depressed rapidly by stage clip, and the baffle plate on the circuit breaker N has been removed from the hole of trip push button, push rod is pressed on the trip push button by stage clip, and circuit breaker N trips with circuit breaker R simultaneously.In like manner " close " lock at circuit breaker R, during circuit breaker N " branch " lock, because accidental cause takes place, the protection mechanism when circuit breaker N " closes " lock is same as above.

Claims

1. circuit breaker that has the mechanical interlocking protective device, mainly form by the mechanical interlocking protective device, it is characterized in that: more than two, comprise on every circuit breaker of two and all install mechanical interlocking protective device additional, its concrete structure is, on the shell body (13) of circuit breaker, install handle (5) and limit base (15), by handle and limit base steel wire brake cable (1) is housed, the radical of steel wire brake cable is equal to the platform number of circuit breaker, on the shell body of circuit breaker, also install base plate (10) and support (14), install datum plate (12) on the support therein, installing baffle plate (7) and limit base (11) on the datum plate, between the plate end of datum plate and the end of baffle plate extension spring (8) is housed. the other end of baffle plate is equipped with backstop (9); Install guide pin bushing (2) on the base plate therein, pass through wherein exit that handle and limit base be equipped with the steel wire brake cable and on circuit breaker own, link above-mentioned by limit base (11) and baffle plate (7), the exit of remaining every steel wire brake cable is packed in the guide pin bushing by the stage clip on every other circuit breaker respectively, and with every circuit breaker on guide pin bushing in the push rod of packing into link.