CN202475327U - Automatic alarm control device of motor - Google Patents

Abstract

The utility model relates to an automatic alarm control device for a motor. The main contact of a contactor is connected in series with the power supply circuit of the motor. The contact of the electric contact pressure gauge is connected to the 220V phase line, the first contact of the pressure gauge is connected in series with the first intermediate relay and the first normally closed contact of the contactor, and then connected to the zero line; the second contact of the pressure gauge Connect the first normally open contact of the series contactor and the second intermediate relay to the neutral line. The 220V power supply circuit is connected with the following components: the first normally open contact of the first intermediate relay, the button, the contactor, the normally closed contact of the second intermediate relay, the delay electronic relay and the thermal relay connected in series. Normally closed contact; time-delayed electronic relay, stop indicator light and power-off indicator light; normally open contact of series-connected time-delay electronic relay and alarm bell; second normally-closed contact of series-connected contactor, thermal relay and pressurized light. The device has the characteristics of over-temperature automatic shutdown, instantaneous charging of pressure gauge contacts, and long service life.

Description

Motor automatic alarm control device

technical field

The utility model relates to an automatic start-stop control device for a motor, in particular to realize the automatic start-up of the motor by using an electric contact pressure gauge when the oil pressure of the oil machine reaches a specified value, and a 220V AC power supply is connected alternately through the three contacts of the pressure gauge. stop control device.

Background technique

The motor used for oil flow and pressurization often runs overtime and overheated and overheated, which eventually causes the motor to fail, thereby reducing the life of the motor. In particular, the electric contact of the electric contact pressure gauge connected in the oil circuit, due to the long time of energized contact, causes arcing, thereby causing damage to the contact.

Utility model content

The purpose of the utility model is to provide an automatic motor alarm control device that automatically cuts off the power supply when the temperature exceeds the time limit, and the contacts of the electric contact pressure gauge are only charged instantaneously during the start and stop of the motor.

The purpose of this new model is achieved in this way: a motor automatic alarm control device, including a motor YD, the main contact of the contactor JC is connected in series on the power supply circuit of the motor YD, the electric contact pressure gauge, and the 220V phase line are connected to the The contact P of the electric contact pressure gauge, the first contact P1 of the electric contact pressure gauge are sequentially connected in series with the first normally closed contact JC1 of the contactor JC and the first intermediate relay 1ZJ, and then connected to the 220V neutral line;

The second contact P2 of the electric contact pressure gauge is sequentially connected in series with the first normally open contact JC2 of the contactor and the second intermediate relay 2ZJ, and then connected to the 220V neutral line;

The normally open contact 1ZJ2 of the first intermediate relay 1ZJ, the button TA, the contactor JC, the normally closed contact 2ZJ1 of the second intermediate relay 2ZJ, and the delay electronic relay KT are connected in series between the 220V phase line and the neutral line. The normally closed contact KT2 of the thermal relay RJA and the normally closed contact RJ of the thermal relay RJA;

There is also a delay electronic relay KT connected in series between the 220V phase line and the neutral line;

The normally open contact KT1 of the delay electronic relay KT and the alarm bell DL are connected in series between the 220V phase line and the neutral line;

The second normally open contact JC3 of the contactor JC, the thermal relay RJA and the pressurization indicator HD are connected in series between the 220V phase line and the neutral line;

The second normally closed contact JC4 of the contactor JC and the shutdown indicator light LD are connected in series between the 220V phase line and the neutral line;

There is also a power failure indicator LD1 connected in series between the 220V phase line and the neutral line.

A fuse is also connected in series on the above-mentioned 220V phase line.

The beneficial effects of the utility model are:

1. Use electronic intermediate relays (1ZJ, 2ZJ) to respectively connect the intermediate conversion contacts of the electric contact pressure gauge, so that the working current of P, P1, and P2 flowing through the electric contacts is very small, and the contacts do not emit arcs, and are not easy to be carbonized and stained. Even, prolong the service life of the contact.

2. The alarm function of the oil machine is added. According to the average pressurization time of the pressurization motor, a motor working time is artificially determined. If the pressurization time exceeds the specified value due to equipment reasons or other reasons, an alarm signal will be sent and it will be automatically cut off. The working power of the motor protects the equipment and reduces losses.

3. The automatic alarm control box of the diesel engine runs stably and has high reliability.

4. The protection is integrated in a control box, and the installation and wiring are simple and easy to install.

5. It has a wide range of applications, and can be widely used for automatic start and stop of pressurized motors and other equipment.

6. It can provide design basis for manufacturers to produce new type of motor automatic comprehensive protection control.

The utility model should be widely applicable to the start and stop of various types of single motors (for equipment using a pair of normally open contacts and normally closed contacts, the normally closed contacts are replaced with normally open contacts, and the use of The control box is not affected in any way). Especially for electrical contact equipment of precision instruments, such as dry reed relays, electrical contact pressure gauges and relays with small contact capacity, if the device is used, the current flowing through the corresponding contacts can be reduced, and the contacts will not arc. It is not easy to carbonize and stick, prolong the service life of the electrical contacts of precision instruments, and improve the stability of starting and stopping the motor. Added oil machine alarm function. When pressurization is caused by equipment or other reasons, the pressurization motor does not stop or runs overtime or overtemperature, the alarm will send out an alarm signal and automatically cut off the working power of the motor to protect the equipment and reduce losses.

Description of drawings

Fig. 1 is the electrical wiring diagram of the present utility model.

Detailed ways

Figure 1 shows that the three-phase lines A1, B1, and C1 respectively pass through the three-pole circuit breaker, and the three normally closed main contacts RJ0 of the thermal relay and the three normally open main contacts JC0 of the contactor form a power supply circuit with the motor YD. The main contact of the contactor JC is connected in series to the power supply circuit of the motor YD, the electric contact pressure gauge, and the 220V phase line are connected to the contact P of the electric contact pressure gauge, and the first contact P1 of the electric contact pressure gauge is sequentially The first normally closed contact JC1 of the contactor JC and the first intermediate relay 1ZJ are connected in series to the 220V neutral line; the second contact P2 of the electric contact pressure gauge is serially connected to the first normally open contact of the contactor The point JC2 and the second intermediate relay 2ZJ are connected to the 220V neutral line; between the 220V phase line and the neutral line, the normally open contact 1ZJ2 of the first intermediate relay 1ZJ, the button TA, the contactor JC, the second The normally closed contact 2ZJ1 of the intermediate relay 2ZJ, the normally closed contact KT2 of the delay electronic relay KT and the normally closed contact RJ of the thermal relay RJA; a delay electronic relay KT is connected in series between the 220V phase line and the neutral line; The normally open contact KT1 of the delay electronic relay KT and the alarm bell DL are connected in series between the 220V phase line and the neutral line; the second contactor JC is also connected in series between the 220V phase line and the neutral line. The normally open contact JC3, the thermal relay RJA and the pressurization indicator HD; the second normally closed contact JC4 of the contactor JC and the shutdown indicator LD are connected in series between the 220V phase line and the neutral line; the 220V phase line There is also a power failure indicator LD1 connected in series with the neutral line. A fuse is also connected in series on the 220V phase line (the phase line A1 is shown in the figure, and the neutral line is the neutral line N).

The working principle of the utility model: when the electric contact pressure gauge contacts P and P1 are connected, the 220V current passes through the working coil of the first intermediate relay 1ZJ and the normally closed contact JC1 of the contactor JC to form a working circuit, and the first intermediate relay 1ZJ The normally open contact 1ZJ2 is closed, and the current passes through the closed contact of 1ZJ2, the button TA contactor coil JC, the normally closed contact 2ZJ1 of the second intermediate relay 2ZJ, the normally closed contact KT2 of the delay electronic relay KT and the normally closed contact of the thermal relay. The point RJ forms a 220V path, the contactor JC acts, the working power is turned on, and the motor starts. While the contactor is working, the normally closed contact JC1 of the contactor JC is disconnected, and the contact P1 of the electric contact pressure gauge YX loses power, and at the same time (The second normally open contact JC3 is closed) the pressurized indicator light indicates. The same principle, when the air pressure of the electric contact pressure gauge reaches the specified value, the 220V current passes through the working coil of the second intermediate relay 2ZJ and the normally open contact JC2 of the contactor JC to form a working circuit, and the normally closed contact of the second intermediate relay 2ZJ 2ZJ1 is disconnected, the contactor coil JC loses power, the contactor JC moves, the working power is disconnected, the motor stops, and the pressure is automatically stopped. When the contactor stops working, the contactor JC normally open contact JC2 is disconnected, and the electrical contact The contact P2 of the pressure gauge YX loses power, and the shutdown indicator light indicates at the same time. During the normal start and stop process, the contacts (i.e. electric contacts) P1 and P2 are charged instantaneously, and are converted by the electronic intermediate relay. When P contacts P1 and P2 respectively, the contact current is very small, no arcing, and During the conversion process of the normally closed and normally open contacts JC1 and JC2 of the contactor, when P is disconnected from P1 and P2 respectively, there is no charge, which improves the stability and service life of the electric contact pressure gauge. The oil machine automatic alarm control box adds the oil machine alarm function. When the motor starts, according to the time exceeding the pressurized motor, a delay start time is artificially set on the delay electronic relay (KT). When the pressurized motor When the time limit is running, the normally open contact (KT1) of the delay electronic relay (KT) is closed, the alarm signal and alarm are connected, and the normally closed contact (KT2) disconnects the working power of the contactor (JC), and the motor is pressurized Automatic stop protects equipment and reduces losses. When the equipment failure causes overcurrent, the motor protection circuit breaker cuts off the working power supply, and the power failure indicator light indicates.

When the oil pressure of the electric contact pressure gauge reaches the specified value, the AC 220V power supply is connected to P1 and P2 respectively through the contact P to realize the purpose of automatic start and stop of the motor. The utility model controls the working coil of the contactor JC by closing and disconnecting the intermediate transfer contact, and realizes automatic starting and stopping of the pressurized motor.

The main equipment of the utility model includes: 1. A three-pole circuit breaker of an appropriate model is selected according to the capacity of the pressurized motor. 2. Select a contactor and a thermal relay with appropriate capacity according to the capacity of the oil pressure pressurized motor. 3. Two 1ZJ and 2ZJ electronic intermediate relays of 220V or corresponding voltage level. 4. There is one indicator light for pressurization indicator, stop indicator, and power failure indicator, one (start-up) button and one test button. 5. One power-on delay relay, one alarm bell or other alarm equipment.

Claims (2)

1. A motor automatic alarm control device, comprising, a motor YD, the main contact of the contactor JC is connected in series on the power supply circuit of the motor YD, an electric contact pressure gauge, it is characterized in that the 220V phase line is connected to the electric contact The contact P of the pressure gauge and the first contact P1 of the electric contact pressure gauge are sequentially connected in series with the first normally closed contact JC1 of the contactor JC and the first intermediate relay 1ZJ, and then connected to the 220V neutral line; The second contact P2 of the electric contact pressure gauge is sequentially connected in series with the first normally open contact JC2 of the contactor and the second intermediate relay 2ZJ, and then connected to the 220V neutral line; The normally open contact 1ZJ2 of the first intermediate relay 1ZJ, the button TA, the contactor JC, the normally closed contact 2ZJ1 of the second intermediate relay 2ZJ, and the delay electronic relay KT are connected in series between the 220V phase line and the neutral line. The normally closed contact KT2 of the thermal relay RJA and the normally closed contact RJ of the thermal relay RJA; There is also a delay electronic relay KT connected in series between the 220V phase line and the neutral line; The normally open contact KT1 of the delay electronic relay KT and the alarm bell DL are connected in series between the 220V phase line and the neutral line; The second normally open contact JC3 of the contactor JC, the thermal relay RJA and the pressurization indicator HD are connected in series between the 220V phase line and the neutral line; The second normally closed contact JC4 of the contactor JC and the shutdown indicator light LD are connected in series between the 220V phase line and the neutral line; There is also a power failure indicator LD1 connected in series between the 220V phase line and the neutral line. 2. The automatic motor alarm control device according to claim 1, wherein a fuse is connected in series on the 220V phase line.

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