Operation control system for industrial production driving equipment

Abstract

An operation control system for industrial production driving equipment comprises a main loop and a control loop, and is technically characterized in that the control loop comprises an automatic control loop, a manual control loop, a motor start-stop circuit and a change-over switch SA, and in the automatic control loop, a coil of a repeater KA1 is connected with an automatic control gear of the change-over switch SA; in the manual control loop, a coil of the relay KA2 is sequentially connected in series with a start button 2SB2 and a stop button 2SB1 and then is connected with a manual control gear of the change-over switch SA, and a normally open contact KA2-1 of the relay KA2 is connected in parallel beside the stop button 2SB1; in the motor start-stop circuit, a normally open contact KA1-1 of the relay KA1 and a normally open contact KA2-2 of the relay KA2 are connected in parallel and then are connected in series with a coil of the contactor 2KM1, and a normally open contact 2KM1-1 of the contactor 2KM1 is connected with a power supply and a motor M. According to the utility model, an automatic control mode and a manual control mode are adopted, and meanwhile, a protection circuit is arranged to prevent the normal operation of equipment from being influenced by over-high and over-low liquid level, over-high and over-low temperature or over-high and over-low pressure.

Description

Technical Field:

[0001] The utility model relates to the field of industrial control, and particularly relates to an operating control system for driving equipment in industrial production. Background Art:

[0002] In an industrial control system, for some operating equipment with relatively simple working conditions, whether it is to save the cost of the control system or to facilitate the maintenance of the control system, the structure of its control system does not need to be too complex. However, in order to reduce the labor intensity and difficulty of the staff, an automatic control method should be adopted as much as possible. At the same time, it should also be considered that if an unexpected situation occurs in the operating equipment, it is best for the staff to judge manually whether the equipment needs to operate normally. In addition, generally for operating equipment whose controlled object is liquid, common factors affecting its normal operation include liquid level, liquid temperature, motor temperature, liquid pressure, etc. If the values of these parameters exceed the normal range, it may cause the equipment to fail to operate normally, or the controlled object to malfunction or have potential safety hazards. Therefore, how to design a reasonable control system according to the actual situation of the controlled equipment is extremely crucial. Summary of the Invention:

[0003] The purpose of the utility model is to provide an operating control system for driving equipment in industrial production, which is provided with an automatic control method and a manual control method, and is also provided with a protection circuit to prevent the equipment from being affected by too high or too low liquid level, too high or too low temperature, or too high or too low pressure, so as to ensure the safety and stability of the equipment and the controlled object.

[0004] The operating control system for driving equipment in industrial production of the utility model includes a main circuit and a control circuit. The motor M in the main circuit is connected to the power supply through the circuit breaker QF2, and the control circuit is connected to the power supply through the circuit breaker QF3. The technical solution adopted is that the control circuit includes an automatic control circuit, a manual control circuit, a motor start-stop circuit, and a changeover switch SA.

[0005] In the automatic control circuit, the coil of the relay KA1 is connected to the automatic control gear of the changeover switch SA.

[0006] In the manual control circuit, the coil of the relay KA2 is connected to the manual control gear of the changeover switch SA after being sequentially connected in series with the start button 2SB2 and the stop button 2SB1. A normally open contact KA2-1 of the relay KA2 is connected in parallel beside the stop button 2SB1.

[0007] In the motor start-stop circuit, the normally open contacts KA1-1 of the relay KA1 and the normally open contacts KA2-2 of the relay KA2 are connected in parallel and then connected in series with the coil of the contactor 2KM1. The normally open contact 2KM1-1 of the contactor 2KM1 is connected to the power supply and the motor M.

[0008] As a further improvement of the present utility model, the control circuit further includes a motor operation indication circuit. In the motor operation indication circuit, a normally open contact 2KM1-3 of a contactor 2KM1 is connected in series with a motor operation indicator light 2HG.

[0009] As a further improvement of the present utility model, the control circuit further includes a motor stop indication circuit. In the motor stop indication circuit, a normally open contact 2KM1-2 of a contactor 2KM1 is connected in series with a motor stop indicator light 2HR.

[0010] As a further improvement of the present utility model, a protection circuit is further included. The protection circuit is connected to a power supply through a circuit breaker QF3. The protection circuit includes a liquid level protection circuit, and / or a temperature protection circuit, and / or a pressure protection circuit.

[0011] As a further improvement of the present utility model, in the liquid level protection circuit, a high liquid level alarm circuit and a low liquid level alarm circuit connected in parallel are provided through a liquid level gauge. In the high liquid level alarm circuit, a normally open contact of high liquid level is connected in series with a high liquid level alarm light 3HR-0; in the low liquid level alarm circuit, a normally open contact of low liquid level is connected in series with a low liquid level alarm light 3HR-1.

[0012] As a further improvement of the present utility model, in the temperature protection circuit, a high temperature alarm circuit and a low temperature alarm circuit connected in parallel are provided through a temperature measuring instrument. In the high temperature alarm circuit, a normally open contact of high temperature is connected in series with a high temperature alarm light 3HR-2; in the low temperature alarm circuit, a normally open contact of low temperature is connected in series with a low temperature alarm light 3HR-3.

[0013] As a further improvement of the present utility model, in the pressure protection circuit, a high pressure alarm circuit and a low pressure alarm circuit connected in parallel are provided. In the high pressure alarm circuit, a normally open contact of high liquid pressure is connected in series with a high pressure alarm light 3HR-4; in the low pressure alarm circuit, a normally open contact of low liquid pressure is connected in series with a low pressure alarm light 3HR-5.

[0014] As a further improvement of the present utility model, in the automatic control circuit, a coil of a relay KA1 is connected in series with a normally closed switch of a high temperature signal of the temperature measuring instrument.

[0015] As a further improvement of the present utility model, in the automatic control circuit, a coil of a relay KA1 is connected in series with a normally closed switch of a low temperature signal of the temperature measuring instrument.

[0016] As a further improvement of the present utility model, a thermal relay 2FR is connected in series beside a motor M of the main circuit, and a normally closed contact 2FR-1 of the thermal relay 2FR is arranged at an output end of the control circuit.

[0017] The operation control system of the industrial production drive equipment of the present utility model has the following beneficial effects compared with the prior art:

[0018] The control loop of the present utility model includes an automatic control loop and a manual control loop, which cooperate with the motor start-stop circuit respectively to achieve the automatic start and manual start of the motor. Under normal circumstances, the motor can be controlled in the way of automatic start and stop, which can greatly reduce the labor intensity and difficulty of the staff. However, when a failure occurs in the automatic control or an emergency occurs on-site and human intervention is required, the manual start mode of the motor can be used to deal with it. In this way, it can be ensured that the control device has different control modes under different circumstances and avoid the shutdown of the equipment from affecting the production progress. At the same time, the present utility model is provided with a protection circuit to prevent common parameter values such as liquid level, temperature, and pressure from affecting the normal operation of the equipment and ensure the safety and stability of the equipment or the controlled object. Brief description of the drawings:

[0019] Figure 1 is the control schematic diagram of the present utility model;

[0020] Figure 2 is the schematic diagram of the protection circuit in the present utility model. Specific embodiments:

[0021] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0022] The operation control system of the industrial production drive equipment in this specific embodiment, as Figure 1 shown, includes a main loop and a control loop. The motor M in the main loop is connected to the power supply through the circuit breaker QF2, and the control loop is connected to the power supply through the circuit breaker QF3. The control loop includes an automatic control loop, a manual control loop, a motor start-stop circuit, and a changeover switch SA.

[0023] In the automatic control loop, the coil of the relay KA1 is connected to the automatic control gear of the changeover switch SA;

[0024] In the manual control loop, the coil of the relay KA2 is connected to the manual control gear of the changeover switch SA after being sequentially connected in series with the start button 2SB2 and the stop button 2SB1. A normally open contact KA2-1 of the relay KA2 is connected in parallel beside the stop button 2SB1.

[0025] In the motor start-stop circuit, the normally open contact KA1-1 of the relay KA1 and the normally open contact KA2-2 of the relay KA2 are connected in parallel and then connected in series with the coil of the contactor 2KM1. The normally open contact 2KM1-1 of the contactor 2KM1 is connected to the power supply and the motor M.

[0026] When the motor M needs to be automatically started, connect the points ① and ② of the change-over switch SA to connect the automatic control circuit. The coil of the relay KA1 is energized and sends a signal to the remote control system indicating that the automatic control circuit is connected. The normally open contact KA1-1 of the relay KA1 closes, connecting the motor start-stop circuit. The coil of the contactor 2KM1 is energized, and the normally open contact 2KM1-1 of the contactor 2KM1 in the main circuit closes, connecting the power supply to the motor M, and the motor M starts to run. When the points ① and ② of the change-over switch SA are disconnected, the automatic control circuit is disconnected, the coil of the relay KA1 loses power, its normally open contact KA1-1 opens, the coil of the contactor 2KM1 loses power, its normally open contact 2KM1-1 opens, disconnecting the power supply from the motor M, and the motor M stops running.

[0027] When the motor M needs to be manually started, connect the points ③ and ④ of the change-over switch SA to connect the manual control circuit. Then press the start button 2SB2. The coil of the relay KA2 is energized and sends a signal to the remote control system indicating that the manual control circuit is connected. At the same time, the normally open contact KA2-1 of the relay KA2 closes to form a self-locking to keep the coil of the relay KA2 energized. The normally open contact KA2-2 of the relay KA2 closes, connecting the motor start-stop circuit. The coil of the contactor 2KM1 is energized, and its normally open contact 2KM1-1 closes, connecting the power supply to the motor M, and the motor M starts to run. When the motor M needs to stop, press the stop button 2SB1 to disconnect the manual control circuit. The coil of the relay KA2 loses power, its normally open contact KA2-1 opens, and at the same time its normally open contact KA2-2 opens, disconnecting the motor start-stop circuit. The coil of the contactor 2KM1 loses power, its normally open contact 2KM1-1 opens, disconnecting the power supply from the motor M, and the motor M stops running.

[0028] In some preferred embodiments, as Figure 1 shown, the control circuit further includes a motor running indication circuit. In the motor running indication circuit, the normally open contact 2KM1-3 of the contactor 2KM1 is connected in series with the motor running indicator light 2HG. When the motor start-stop circuit is connected, the coil of the contactor 2KM1 is energized, and its normally open contact 2KM1-3 closes, connecting the motor running indication circuit. The motor running indicator light 2HG lights up, indicating that the motor M is in the starting and running state for the operator to view.

[0029] In some preferred embodiments, as Figure 1As shown, the control loop further includes a motor stop indication circuit. In the motor stop indication circuit, a normally open contact 2KM1-2 of a contactor 2KM1 is connected in series with a motor stop indicator light 2HR. When the motor start-stop circuit is disconnected, the coil of the contactor 2KM1 is de-energized, and its normally closed contact 2KM1-2 is closed. Then the motor stop indication circuit is turned on, and the motor stop indicator light 2HR therein lights up, indicating that the motor M is in a stopped state for the operator to view.

[0030] In some preferred embodiments, as Figure 2 shown, a protection circuit is further included. The protection circuit is connected to the power supply through a circuit breaker QF3. The protection circuit includes a liquid level protection circuit, and / or a temperature protection circuit, and / or a pressure protection circuit. One or more of the protection circuits are set according to the actual situation of the controlled device. For example, when the motor M is mainly used as a liquid pump for supplying water and oil, a liquid level protection circuit should be set to prevent damage to the motor or other parts of the device due to too high or too low liquid level. If the liquid temperature and liquid pressure are likely to damage the motor M or other parts of the device, corresponding temperature protection circuit and pressure protection circuit should be set.

[0031] In some preferred embodiments, as Figure 2 shown, in the liquid level protection circuit, a high liquid level alarm circuit and a low liquid level alarm circuit are provided in parallel through a liquid level gauge. In the high liquid level alarm circuit, a normally open contact of high liquid level is connected in series with a high liquid level alarm light 3HR-0. In the low liquid level alarm circuit, a normally open contact of low liquid level is connected in series with a low liquid level alarm light 3HR-1. When the liquid level where the motor M is located is too high or too low, or the liquid level of other structural components of the device is too high or too low, or the liquid level of the controlled object of the device is too high or too low, the normally open contact of high liquid level in the liquid level gauge is closed, and the high liquid level alarm light 3HR-0 is turned on and lights up, or the normally open contact of low liquid level in the liquid level gauge is closed, and the low liquid level alarm light 3HR-1 is turned on and lights up, thus realizing liquid level protection.

[0032] In some preferred embodiments, as Figure 2 shown, in the temperature protection circuit, a high temperature alarm circuit and a low temperature alarm circuit are provided in parallel through a temperature measuring instrument. In the high temperature alarm circuit, a normally open contact of high temperature is connected in series with a high temperature alarm light 3HR-2. In the low temperature alarm circuit, a normally open contact of low temperature is connected in series with a low temperature alarm light 3HR-3. When the temperature of the motor is too high or too low, or the temperature of other structural components of the device is too high or too low, or the temperature of the controlled object of the device is too high or too low, the normally open contact of high temperature in the temperature measuring instrument is closed, and the high temperature alarm light 3HR-2 is turned on and lights up, or the normally open contact of low temperature in the temperature measuring instrument is closed, and the low temperature alarm light 3HR-3 is turned on and lights up, thus realizing temperature protection.

[0033] In some preferred embodiments, asFigure 2 As shown, in the pressure protection circuit, there are a high-pressure alarm circuit and a low-pressure alarm circuit connected in parallel. In the high-pressure alarm circuit, a normally open contact for high liquid pressure is connected in series with a high-pressure alarm lamp 3HR-4; in the low-pressure alarm circuit, a normally open contact for low liquid pressure is connected in series with a low-pressure alarm lamp 3HR-5. When the pressure of the liquid in the structural components of the equipment is too high or too low, or when the pressure of the liquid of the controlled object of the equipment is too high or too low, the normally open contact for high liquid pressure closes, and the high-pressure alarm lamp 3HR-4 is turned on and lights up, or the normally open contact for low liquid pressure closes, and the low-pressure alarm lamp 3HR-5 is turned on and lights up, thus realizing liquid pressure protection.

[0034] In some preferred embodiments, as Figure 1 shown, in the automatic control loop, the coil of the relay KA1 is connected in series with the normally closed switch of the high-temperature signal of the thermometer. When the temperature of the motor is too high, or when the temperature of other structural components of the equipment is too high, or when the temperature of the controlled object of the equipment is too high, the normally closed switch of the high-temperature signal disconnects, causing the automatic control loop to disconnect, the coil of the relay KA1 loses power, and the motor M stops running, thereby protecting the motor M, or other structural components of the equipment, or the controlled object of the equipment.

[0035] In some preferred embodiments, as Figure 1 shown, in the automatic control loop, the coil of the relay KA1 is connected in series with the normally closed switch of the low-temperature signal of the thermometer. When the temperature of the motor is too low, or when the temperature of other structural components of the equipment is too low, or when the temperature of the controlled object of the equipment is too low, the normally closed switch of the low-temperature signal disconnects, causing the automatic control loop to disconnect, the coil of the relay KA1 loses power, and the motor M stops running, thereby protecting the motor M, or other structural components of the equipment, or the controlled object of the equipment from temperature.

[0036] Similarly, in some other embodiments, a normally closed contact for high liquid level, and / or a normally closed contact for low liquid level can also be set in the automatic control loop, or in the motor start-stop circuit; or a normally closed contact for high pressure, and / or a normally closed contact for low pressure. When the liquid level of the motor is too high or too low, or when the liquid level of other structural components of the equipment is too high or too low, or when the liquid level of the controlled object of the equipment is too high or too low, the normally closed contact for high liquid level or the normally closed contact for low liquid level will disconnect, thereby protecting the motor M, or other structural components of the equipment, or the controlled object of the equipment from liquid level; when the temperature of the motor is too high or too low, or when the temperature of other structural components of the equipment is too high or too low, or when the temperature of the controlled object of the equipment is too high or too low, the normally closed contact for high pressure or the normally closed contact for low pressure will disconnect, thereby protecting the motor M, or other structural components of the equipment, or the controlled object of the equipment from pressure.

[0037] In some preferred embodiments, a thermal relay 2FR is connected in series beside the motor M of the main circuit, and the normally closed contact 2FR-1 of the thermal relay 2FR is arranged at the output end of the control circuit. When the temperature of the motor M is too high, the thermal relay 2FR starts to work, its normally closed contact 2FR-1 disconnects, the entire control circuit is powered off, and the motor M stops running, thereby providing overheat protection for the motor M.

Claims

1. An industrial production drive equipment operation control system, comprising a main circuit and a control circuit, wherein the motor M in the main circuit is connected to the power supply through a circuit breaker QF2, and the control circuit is connected to the power supply through a circuit breaker QF3, characterized in that: The control circuit includes an automatic control circuit, a manual control circuit, a motor start-stop circuit and a transfer switch SA. In the automatic control loop, the coil of the repeater KA1 is connected to the automatic control gear of the conversion switch SA; In the manual control circuit, the coil of the repeater KA2 is connected in series with the start button 2SB2 and the stop button 2SB1 in sequence, and then connected to the manual control gear of the conversion switch SA. The normally open contact KA2-1 of the repeater KA2 is connected in parallel next to the stop button 2SB1. In the motor start-stop circuit, the normally open contact KA1-1 of the repeater KA1 and the normally open contact KA2-2 of the repeater KA2 are connected in parallel to the coil of the contactor 2KM1 in series. The normally open contact 2KM1-1 of the contactor 2KM1 is connected to the power supply and the motor M.

2. An industrial production drive equipment operation control system as claimed in claim 1, characterized in that: The control circuit also includes a motor operation indication circuit, in which the normally open contact 2KM1-3 of the contactor 2KM1 is connected in series with a motor operation indicator light 2HG.

3. An industrial production drive equipment operation control system as claimed in claim 1, characterized in that: The control circuit also includes a motor stop indication circuit, in which a normally open contact 2KM1-2 of the contactor 2KM1 is connected in series with a motor stop indicator light 2HR.

4. An industrial production drive equipment operation control system as claimed in claim 1, characterized in that: It also includes a protection circuit, which is connected to the power supply through a circuit breaker QF3. The protection circuit includes a liquid level protection circuit, and / or a temperature protection circuit, and / or a pressure protection circuit.

5. An industrial production drive equipment operation control system as claimed in claim 4, characterized in that: The liquid level protection circuit is provided with a high liquid level alarm circuit and a low liquid level alarm circuit connected in parallel through a liquid level gauge. In the high liquid level alarm circuit, the high liquid level normally open contact is connected in series with a high liquid level alarm lamp 3HR-0; in the low liquid level alarm circuit, the low liquid level normally open contact is connected in series with a low liquid level alarm lamp 3HR-1.

6. An industrial production drive equipment operation control system as claimed in claim 4, characterized in that: The temperature protection circuit is provided with a high temperature alarm circuit and a low temperature alarm circuit connected in parallel with each other through a thermometer. In the high temperature alarm circuit, the high temperature normally open contact is connected in series with a high temperature alarm lamp 3HR-2; in the low temperature alarm circuit, the low temperature normally open contact is connected in series with a low temperature alarm lamp 3HR-3.

7. An industrial production drive equipment operation control system as claimed in claim 4, characterized in that: The pressure protection circuit is provided with a high pressure alarm circuit and a low pressure alarm circuit connected in parallel with each other. In the high pressure alarm circuit, the high liquid pressure normally open contact is connected in series with a high pressure alarm lamp 3HR-4; in the low pressure alarm circuit, the low liquid pressure normally open contact is connected in series with a low pressure alarm lamp 3HR-5.

8. An industrial production drive equipment operation control system as claimed in claim 6, characterized in that: In the automatic control loop, the coil of the repeater KA1 is connected in series with the high temperature signal normally closed switch of the thermometer.

9. An industrial production drive equipment operation control system as claimed in claim 6, characterized in that: In the automatic control loop, the coil of the repeater KA1 is connected in series with the low temperature signal normally closed switch of the thermometer.

10. An industrial production drive equipment operation control system according to any one of claims 1 to 9, characterized in that: A thermal relay 2FR is connected in series beside the motor M of the main circuit, and a normally closed contact 2FR-1 of the thermal relay 2FR is arranged at the output end of the control circuit.

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