CN203434598U

CN203434598U - Mine fan current protection circuit

Info

Publication number: CN203434598U
Application number: CN201320381029.XU
Authority: CN
Inventors: 赵树元
Original assignee: XIANGYUAN SHUYUAN ELECTRICAL APPLIANCE CO Ltd
Current assignee: XIANGYUAN SHUYUAN ELECTRICAL APPLIANCE CO Ltd
Priority date: 2013-06-29
Filing date: 2013-06-29
Publication date: 2014-02-12
Anticipated expiration: 2023-06-29

Abstract

The utility model provides a mine fan current protection circuit which belongs to the technical field of mine motor protection control devices. According to the technical problem to be solved, the circuit which can realize mine fan current protection is provided. According to the technical scheme, the mine fan current protection circuit comprises a circuit breaker DZ1, an alternating current contactor CJ1, a current relay LJ1, a start button QA1, a stop button TA1, fuses RT1 and RT2, indication lamps XHD1 and XHD2 and an intermediate relay ZJ1. The coil of the alternating current contactor CJ1 is CJ1.1. The main contact is CJ1.2. The normally open contact is CJ1.3. The normally closed contact is CJ1.4. The normally open contact of the current relay LJ1 is LJ1.1. The coil of the intermediate relay ZJ1 is ZJ1.1, and the normally closed contact is ZJ1.2. The mine fan current protection circuit provided by the utility model is suitable for the field of coal mines.

Description

A kind of mine ventilator current protecting circuit

Technical field

A kind of mine ventilator current protecting circuit of the utility model, belongs to mine motor protection control device technical field.

Background technology

The overload protection mode that motor generally adopts is at present that thermal protector is connected in to motor end of incoming cables; occur after overcurrent, thermal protector action, cuts off motor main circuit; reach the object of protection motor; the benefit of this protected mode is reliable in action, and sensitivity is higher, but shortcoming is also a lot; greatest problem is often easily to cause mistake protection; particularly, for the blower motor in colliery, once misoperation is shut down, consequence is abnormally dangerous.

Utility model content

The utility model overcomes the deficiency that prior art exists, and technical problem to be solved is: a kind of circuit that can meet mine ventilator current protection is provided.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of mine ventilator current protecting circuit, comprising: circuit breaker DZ1, A.C. contactor CJ1, current relay LJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2 and intermediate relay ZJ 1; Wherein:

The coil of A.C. contactor CJ1 is CJ1.1, and its main contacts is CJ1.2, and normally opened contact is CJ1.3, and normally-closed contact is CJ1.4;

The normally opened contact of current relay LJ1 is LJ1.1;

The coil of intermediate relay ZJ 1 is ZJ1.1, and its normally-closed contact is ZJ1.2;

The main circuit of motor D1 is: the inlet wire termination three-phase alternating-current supply of described circuit breaker DZ1, the main contacts CJ1.2 that the leading-out terminal of described circuit breaker DZ1 is connected in series A.C. contactor CJ1 successively with after current relay LJ1, be connected with the power end of motor D1;

The current protection control circuit structure of described motor D1 is: after one end serial connection fuse RT1 of described stop button TA1, be connected with control circuit positive source, the other end of stop button TA1 also connects one end of start button QA1, behind one end of one end of the normally opened contact CJ1.3 of A.C. contactor CJ1 and the normally opened contact LJ1.1 of current relay LJ1, be connected with one end of the normally-closed contact CJ1.4 of A.C. contactor CJ1, the other end of described start button QA1 and connect the other end of normally opened contact CJ1.3 of A.C. contactor CJ1 and one end of indicator light XHD1 after be connected with one end of the normally-closed contact ZJ1.2 of intermediate relay ZJ 1,

The other end of the normally-closed contact ZJ1.2 of described intermediate relay ZJ 1 is connected with one end of the coil CJ1.1 of A.C. contactor CJ1, the other end of the normally opened contact LJ1.1 of described current relay LJ1 is connected with one end of the coil ZJ1.1 of intermediate relay ZJ 1, and the other end of the normally-closed contact CJ1.4 of described A.C. contactor CJ1 is connected with one end of indicator light XHD2;

The other end of the coil CJ1.1 of described A.C. contactor CJ1 also connects the other end of indicator light XHD1, be connected with one end of fuse RT2 after the other end of the coil ZJ1.1 of intermediate relay ZJ 1 and the other end of indicator light XHD2, and the other end of described fuse RT2 is connected with control circuit power cathode.

The beneficial effect that the utility model compared with prior art has is: the utility model can detect the stream information of crossing of coal mine blower motor accurately, highly sensitive and high temperature resistant, can accurately indicate running status, avoided the harm bringing due to thermal relay misoperation, whole circuit structure is succinct, practical.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Fig. 1 is the main circuit diagram of motor in the utility model;

Fig. 2 is the current protecting circuit figure of motor in the utility model.

Embodiment

As depicted in figs. 1 and 2, a kind of mine ventilator current protecting circuit of the utility model, comprising: circuit breaker DZ1, A.C. contactor CJ1, current relay LJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2 and intermediate relay ZJ 1; Wherein:

The normally opened contact of current relay LJ1 is LJ1.1;

The main circuit of motor D1 is: inlet wire termination A, the B of described circuit breaker DZ1, C three-phase alternating-current supply, the main contacts CJ1.2 that the leading-out terminal of described circuit breaker DZ1 is connected in series A.C. contactor CJ1 successively with after current relay LJ1, be connected with the power end of motor D1;

In the utility model, close circuit breaker DZ1, electric conduction owner circuit, press start button QA1, turn-on control circuit, the main contacts CJ1.2 of A.C. contactor CJ1, often-have-electricity adhesive, motor D1 starts operation, and the indicator light XHD1 of indication motor machine D1 running status is bright.

Above-mentioned current relay LJ1 is serially connected in the circuit of motor D1, constantly monitor the current value of motor D1, when the current value of motor D 1 is greater than after set point, the normally opened contact LJ1.1 of current relay LJ1 is closed, the normally-closed contact ZJ1.2 of intermediate relay ZJ 1 obtains electric disconnection, and the main contacts CJ1.2 dead electricity of A.C. contactor CJ1 disconnects, and motor D1 is out of service, indicator light XHD2 is bright, represents that motor D1 fault stops; Can detect accurately the stream information of crossing of coal mine blower motor, highly sensitive, and be not subject to temperatures involved, avoided the harm bringing due to thermal relay misoperation.

The utility model adopts the components and parts such as traditional A.C. contactor and auxiliary relay to constitute a complete coal mine blower current protecting circuit, and simple for structure, cost is lower, and reliability is high.

Claims

1. a mine ventilator current protecting circuit, is characterized in that: comprising: circuit breaker DZ1, A.C. contactor CJ1, current relay LJ1, start button QA1, stop button TA1, fuse RT1, RT2, indicator light XHD1, XHD2 and intermediate relay ZJ 1; Wherein:

The normally opened contact of current relay LJ1 is LJ1.1;