CN2337673Y

CN2337673Y - Double-set fuse tongs

Info

Publication number: CN2337673Y
Application number: CN 98237171
Authority: CN
Inventors: 姚钢; 陈元; 韩建妹
Original assignee: Jinzhou Signal & Telecommunication Department Jinzhou Railway Sub-Administratio
Current assignee: Jinzhou Signal & Telecommunication Department Jinzhou Railway Sub-Administratio
Priority date: 1998-04-03
Filing date: 1998-04-03
Publication date: 1999-09-08
Anticipated expiration: 2008-04-03

Abstract

The utility model relates to a double-set fuse converting device which can guarantee safety and can also avoid loss caused by fuse failure. The utility model is characterized in that both ends of a main fuse are connected with a subsidiary fuse and a normally open contact of a relay in series; an input terminal of a main power supply and an electric terminal of the utility model are connected with a main photoelectric coupler and a subsidiary photoelectric coupler which have isolation functions; the utility model is connected with a fuse converting control circuit and a main fuse failure luminescent indicating circuit by the main photoelectric coupler; the utility model is connected with the subsidiary fuse failure luminescent indicating circuit by the subsidiary photoelectric coupler; an absorption capacitor is connected between a positive power supply and a negative power supply of the system; an alarm collecting circuit is connected between a negative terminal of the power supply and a ground wire of the system, and the alarm collecting circuit is connected with an audible and visual alarm which is used for indicating the fusing position of the main fuse.

Description

Two cover fuse conversion equipments

The utility model belongs to a kind of circuit protection device, the two coverization fuse conversion equipments that use in particularly a kind of railway signals equipment.

In the railway signals equipment, the fault that causes because of fuse failure accounts for very big proportion.Owing to all adopt one group of fuse in the existing signalling arrangement, though behind fuse failure failure to the safe side, equipment is quit work within a certain period of time, influence the normal operation of train, cause very big economic loss.

The purpose of this utility model is to provide a kind of and had not only guaranteed safety, but also can avoid two coverization fuse conversion equipments because of fuse failure causes damage and circuit is simple and reliable, cost is low.

The utility model is achieved in that it has the main fuse of a winding at main power source input and output, be serially connected with the normally opened contact of secondary fuse and the relay that is used for realizing that fuse is changed at the two ends of main fuse, key light electric coupling and secondary photoelectrical coupler that buffer action has been arranged in the electricity end termination of main power source input and this device, be connected to the fuse conversion control circuit of control relay contact operating state and the main fuse luminous indicating circuit that fuses by the key light electric coupling, also be connected to the luminous indicating circuit of secondary fuse failure by secondary photoelectrical coupler, at this conversion equipment just, be connected to the absorption electric capacity of anti-interference effect between the negative supply, be connected to the warning Acquisition Circuit between the power supply negative terminal of this conversion equipment and system's ground wire, said warning Acquisition Circuit links to each other with the audible-visual annunciator of the main fuse position that is used to refer to fusing.

Said audible-visual annunciator by the decoding circuit of electronic switch, control electronic switch timesharing, be used for amplifying the amplifier of acquired signal, the single-chip microcomputer that links to each other with amplifier, with the read-only memory of adopting input speech signal and latch, and form by the row of monolithic processor controlled latch and display alarm, charactron and the sound circuit that chord position is put.

Because behind one group of fuse failure, another group spare fuse comes into operation immediately.So both guaranteed safety, avoided the loss that causes because of fuse failure again, but and changed fuse by the position of prompting fuse conversion back warning circuit notification signal maintenance personal.This pair cover fuse conversion equipment also has following characteristics: the principle that 1, meets fault one safety; 2, circuit is simple and reliable; 3, warning circuit and main circuit power are isolated mutually; 4, cost is low.

The drawing explanation:

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is the block diagram of the audible-visual annunciator in the utility model.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

As shown in drawings, the utility model has one group of main fuse F ₂, at main fuse F ₂Two ends be serially connected with secondary fuse F ₁With single contact relay normally open contact J, be connected to the key light electric coupling OPT of buffer action at main power source input 1 ₂, at key light electric coupling OPT ₂Be connected to diode D between middle luminous tube and the signalling arrangement ground end 4 ₃, D ₆, D ₄And resistance R ₃Constitute optocoupler conducting control branch road, system's positive supply 2 is by key light coupling OPT ₂Middle receiving tube is connected to relay J ₁, backward diode D ₅The secondary fuse conducting control branch road that constitutes and by light-emitting diode L ₂And current-limiting resistance R ₄The main fuse that the constitutes luminous indicating circuit that fuses, said optocoupler conducting control branch road and secondary fuse conducting control branch road constitute fuse conversion control circuit C, at key light coupling OPT ₂Middle receiving tube two ends also are connected to reset button S ₁Between main power source input 1 and signalling arrangement ground end 4, pass through secondary photoelectrical coupler OPT ₁Luminous tube be connected to diode D ₁, D ₂With current-limiting resistance R ₂, be used for controlling secondary optocoupler OPT ₁Conducting, system power supply 2 is by secondary optocoupler OPT ₁Receiving tube be connected to resistance R ₁With luminous tube L ₁, more than constitute the luminous indicating circuit B of secondary fuse failure, between system power supply 2,3, connect the absorption capacitor C of anti-interference effect ₁System's negative supply 3 of this pair cover fuse conversion equipment and system's ground wire 3 ' between also be connected to the warning sample circuit 6 that is used for detecting main fuse fusing, warning Acquisition Circuit 6 is by forming with lower unit: be connected on system power supply 3 and system's ground wire 3 ' little resistance sampling resistor R ₅And resistance R ₆Reached the capacitor C of anti-interference effect ₂, diode D ₇, D ₈With operational amplifier IC ₁Warning Acquisition Circuit 6 connects amplifier 9 by the electronic switch 8 by decoding circuit 7 controls that play the time-shared switch effect, acquired signal after amplifying is delivered to (single-chip microcomputer 10 is by read-only memory and latch input speech signal) in the single-chip microcomputer 10, single-chip microcomputer 10 sends signal again and gives charactron 12 and directly give voice alarm circuit 13 through latch 11 respectively, be used for acousto-optic indication respectively, the position of the fuse that indication is burnt more than constitutes audible-visual annunciator A.

When real work, main power source passes through main fuse F from 1 end ₂, deliver to the equipment from 5 ends.Main fuse F ₂Short circuit optocoupler OPT ₂In light-emitting diode, optocoupler OPT ₂Not conducting.As main fuse F ₂During fusing, electric current is from optocoupler OPT ₂Diode through resistance R ₃, terminal 4 flows through, and makes optocoupler OPT ₂Conducting, the conducting of fuse conversion control circuit, relay J ₁Adhesive, its normally opened contact J adhesive inserts main circuit to secondary fuse, simultaneously the main fuse light-emitting diode L in the luminous indicating circuit that fuses ₂Send the ruddiness indication.As pair fusing F ₁After the fusing, optocoupler T ₁Conducting makes the luminous indicating circuit conducting of secondary fuse failure, light-emitting diode L ₁Send the gold-tinted indication.

When conversion equipment was not changed at ordinary times, warning circuit did not have electric current, gathered resistance R ₅No-voltage.When the fuse conversion took place, the electric current in the warning circuit was being gathered resistance R ₅Voltage drop of last generation.Warning Acquisition Circuit 6 connects to single-chip microcomputer 10 by electronic switch 8, and single-chip microcomputer 10 is by the time-shared switch of decoding circuit 7 control electronic switches 8, and whether the fuse alarm of test correspondence simultaneously, thereby realizes the monitoring to each fuse conversion.After recording a certain locational fuse alarm, the charactron 12 of tending to act, row, the chord position of display alarm are put.Sound circuit 13 usefulness voice modes are quoted its position simultaneously, and all the course of work is set by monitoring program.

Claims

1, a kind of two coverization fuse conversion equipment, comprise the main fuse of a winding at the main power source input and output side, it is characterized in that, be serially connected with the normally opened contact of secondary fuse and the relay that is used for realizing that fuse is changed at the two ends of main fuse, the key light electric coupling and the secondary photoelectrical coupler of buffer action have been connected to respectively at the electricity end end of main power source input and this device, be connected to the fuse conversion control circuit and the main fuse fusing luminous display circuit of control relay contact operating state by the key light electric coupling, also be connected to the luminous indicating circuit of secondary fuse failure by secondary photoelectrical coupler, at this device just, be connected to the absorption electric capacity of anti-interference effect between the negative supply, be connected to the warning Acquisition Circuit between the power supply negative terminal of this conversion equipment and system's ground wire, said warning Acquisition Circuit links to each other with the audible-visual annunciator of the main fuse position that is used to refer to fusing.

2, according to the said two coverization fuse conversion equipments of claim 1, it is characterized in that, said audible-visual annunciator by the decoding circuit of electronic switch, control electronic switch timesharing, be used for amplifying the amplifier of acquired signal, the single-chip microcomputer that links to each other with amplifier, be used for the read-only memory and the latch of input speech signal, and form by the row of monolithic processor controlled latch and display alarm, charactron and the sound circuit that chord position is put.

3, two coverization fuse conversion equipment according to claim 1 and 2 is characterized in that said relay is the single contact relay.