Intelligent remote in-situ soft start control system

Abstract

An intelligent remote in-situ soft start control system comprises a main loop and a control loop, the power supply end of the main loop is connected with a three-phase power supply, and the output end of the main loop is connected with a motor M. The technical key points are that the control loop comprises a manual start loop and an automatic start loop, in the manual start loop, after a start button SBF1 is connected with a self-locking contact 1KA1 of a repeater 1KA in parallel, the start button SBF1 is connected with the self-locking contact 1KA1; one end is connected in series with a manual gear of the change-over switch SA through a stop button SBS1, and the other end is connected in series with a coil of the repeater 1KA; in the automatic starting loop, one end of a PLC signal switch is connected in series with an automatic gear of the change-over switch SA, the other end of the PLC signal switch is connected in series with a coil of the repeater 1KA, and the PLC signal switch is connected in parallel with the starting button SBF1 and a self-locking contact 1KA1 of the repeater 1KA. According to the utility model, the motor is started or stopped through the soft start controller, so that the motor can be started or stopped gently, the motor can operate stably when being started or stopped, and overlarge loss of the motor caused by rapid change of the operation state when the motor starts or stops suddenly can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of industrial control, in particular to an intelligent remote on-site soft start control system. Background Art

[0002] Industrial control systems primarily control the motors that drive equipment. By manipulating the motor's start and stop states, they control equipment operation, thereby achieving automated control. In current industrial control systems, excessive inertia can cause significant jerking during the start and stop of equipment motors. This jerky start and stop behavior can cause significant losses to the power equipment.

[0003] In actual work, since the control equipment is often outdoors, and some are even in the open field, such as oil pumps, this type of control equipment greatly increases the labor intensity of the staff. If the staff is on site, they can monitor the operating status of the control equipment at any time and control the operation of the equipment at any time. If the staff is not on site, they need to run back and forth to control the start and stop of the equipment, which increases the labor intensity of the staff and makes it impossible to control the start and stop of the equipment in time. Moreover, for control equipment such as oil pumps installed in the wilderness, due to the limitation of manpower and material resources, the staff cannot monitor the equipment at any time on site, and the management personnel must also understand the operating status of the control equipment at any time. When the on-site staff operate improperly, they need to take correct measures in time to control the start and stop of the equipment. This requires the establishment of an on-site control system and a remote control system. For some wilderness control equipment with complex on-site conditions, a control duty room is often required to be set up at a certain distance from the equipment for the staff to rest and monitor the equipment. Since this control room is also some distance away from the equipment, if the staff is next to the equipment and the equipment must stop due to an unexpected situation, the staff returning to the on-site control room will definitely delay the control time and cause serious losses or accidents. Therefore, for wilderness control equipment with complex on-site industrial control, how to set up a reasonable control system is particularly critical. Summary of the Invention

[0004] The purpose of this utility model is to provide an intelligent remote on-site soft start control system, which aims to overcome the problem in existing industrial control systems that when power equipment starts or stops running, the motor starts or stops suddenly due to excessive inertia, which causes great loss to the motor. At the same time, a reasonable control system should be designed to adapt to the complex wilderness control equipment of on-site industrial control.

[0005] The intelligent remote local soft start control system of the utility model includes a main circuit and a control circuit, and the technical solution adopted is that it also includes a soft start controller.

[0006] The control circuit includes a manual start circuit and an automatic start circuit.

[0007] In the manual start circuit, the start button SBF1 is connected in parallel with the self-locking contact 1KA1 of the relay 1KA, one end of which is connected in series to the manual gear of the switch SA via the stop button SBS1, and the other end is connected in series to the coil of the relay 1KA;

[0008] In the automatic start circuit, one end of the PLC signal switch is connected in series with the automatic gear of the transfer switch SA, and the other end is connected in series with the coil of the repeater 1KA.

[0009] The PLC signal switch is connected in parallel with the start button SBF1 and the self-locking contact 1KA1 of the repeater 1KA;

[0010] The other end of the transfer switch SA is connected to the live wire L2, and the other end of the coil of the repeater 1KA is connected to the neutral wire N.

[0011] The start contact 1KA2 of the relay 1KA is used to connect or disconnect the soft start controller.

[0012] In a preferred embodiment of the present invention, in the manual start circuit, the start button SBF1 is connected in parallel with a local control start button SBF2.

[0013] In another preferred embodiment of the present invention, a local control stop button SBS2 is provided in the manual start circuit, and the local control stop button SBS2, the start button SBF1, the local control start button SBF2 and the self-locking contact 1KA1 of the repeater 1KA are connected in series, and the start button SBF1, the local control start button SBF2 and the self-locking contact 1KA1 of the repeater 1KA are connected in parallel.

[0014] In another preferred embodiment of the present invention, the control circuit includes a soft start operation status display circuit. In the operation status display circuit, the coil of the repeater 2KA is connected in series with the soft start operation status switch R1A, the other end of the soft start operation status switch R1A is connected to the live wire L2, and the other end of the coil of the repeater 2KA is connected to the neutral wire N.

[0015] In another preferred embodiment of the present invention, the control circuit includes a soft start fault display circuit. In the soft start fault display circuit, the coil of the repeater 3KA is connected in series with the soft start fault status switch R2A, the other end of the soft start fault status switch R2A is connected to the live wire L2, and the other end of the coil of the repeater 3KA is connected to the neutral wire N.

[0016] In another preferred embodiment of the present invention, the control circuit includes an integrated fault circuit, in which one end of the low liquid level signal switch 22KA and the starting contact 3KA1 of the repeater 3KA are both connected to the live wire L2, and are connected in parallel with each other and then in series with the coil of the repeater 4KA, and the other end of the coil of the repeater 4KA is connected to the neutral wire N.

[0017] In another preferred embodiment of the present invention, the control circuit also includes a motor protector power supply KQ, the coil of the motor protector power supply KQ is connected in parallel with the coil of the repeater 4KA, and the protection switch KQ1 of the motor protector power supply KQ, the low liquid level signal switch 22KA and the starting contact 3KA1 of the repeater 3KA are connected in parallel with each other.

[0018] In another preferred embodiment of the present invention, the manual start circuit is provided with a normally closed contact 4KA1 of the repeater 4KA, the PLC signal switch and the self-locking contact 1KA1 of the repeater 1KA are connected in parallel with each other, the start button SBF1 and the local control start button SBF2 are connected in parallel with each other and then connected in series with the normally closed contact 4KA1 of the repeater 4KA and the coil of the repeater 1KA in turn.

[0019] In another preferred embodiment of the present invention, the control circuit includes an operation indicator light HR and a fault indicator light HY, the operation indicator light HR is connected in series with the normally open contact 2KA1 of the repeater 2KA, and the fault indicator light HY is connected in series with the normally open contact 4KA2 of the repeater 4KA, one end of the normally open contact 2KA1 of the repeater 2KA and the other end of the normally open contact 4KA2 of the repeater 4KA are connected to the live wire L2, and the other ends of the operation indicator light HR and the fault indicator light HY are connected to the neutral wire N.

[0020] In another preferred embodiment of the present invention, an emergency stop button SBE is provided at the live wire L2 input end of the control circuit.

[0021] The intelligent remote local soft start control system of this utility model has the following beneficial effects:

[0022] 1) The utility model starts or stops the motor through a soft start controller, which can start or stop the motor smoothly and enable the motor to run smoothly when starting or stopping, thus avoiding excessive loss to the motor caused by a rapid change in the running state when the motor starts or stops suddenly.

[0023] 2) This utility model features both an automatic and manual start system. When the device requires manual start, the transfer switch SA is turned to the manual position, and the start button is pressed to connect the soft start controller, which then starts the motor. Simultaneously, the relay 1KA sends a signal to the PLC remote control system as the device's manual start operating status signal, allowing the PLC to understand the device's current operating status. When the device requires automatic start, the transfer switch SA is turned to the automatic position, and the PLC remote control system automatically closes the PLC signal switch, connecting the soft start controller and starting the motor. This combination of on-site manual start and remote automatic start meets diverse device startup requirements, facilitating on-site or remote control of device start and stop operations. It offers high flexibility and wide applicability.

[0024] 3) The present invention further provides a local control start button SBF2 in parallel with the start button SBF1. The local control start button SBF2 is located next to the operating equipment. For some equipment used in field operations, the equipment may be a certain distance from the on-site control room, and workers will often travel back and forth between the equipment and the on-site control room. Therefore, start buttons are provided in the on-site control room and next to the equipment, respectively. This allows on-site workers to easily start the equipment regardless of whether they are in the control room or next to the equipment. Therefore, a local control start button SBF2 is provided next to the equipment, and the start button SBF1 is provided in the on-site control room. Correspondingly, a local control stop button SBS2 is also provided next to the operating equipment, allowing workers to easily stop the running equipment from the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a circuit diagram of the control system of the utility model;

[0026] Figure 2 It is the main circuit diagram of the utility model;

[0027] Figure 3 It is a control loop circuit diagram in the utility model. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0029] The intelligent remote local soft start control system in this embodiment is as follows: Figure 1 、 Figure 2 and Figure 3 As shown, it includes a soft start controller, a main circuit and a control circuit. The power supply end of the main circuit is connected to three power supplies, and a circuit breaker QF is provided next to the three power supplies. An ammeter TA is provided next to the circuit breaker QF. The output end of the main circuit is connected to the motor M. The control circuit is used to control the start and stop of the motor M in the main circuit. The control circuit includes a manual start circuit and an automatic start circuit.

[0030] In the manual start circuit, the start button SBF1 is connected in parallel with the self-locking contact 1KA1 of the relay 1KA, one end of which is connected in series to the manual gear of the switch SA via the stop button SBS1, and the other end is connected in series to the coil of the relay 1KA;

[0031] In the automatic start circuit, one end of the PLC signal switch is connected in series with the automatic gear of the transfer switch SA, and the other end is connected in series with the coil of the repeater 1KA.

[0032] The PLC signal switch is connected in parallel with the start button SBF1 and the self-locking contact 1KA1 of the repeater 1KA;

[0033] The other end of the transfer switch SA is connected to the live wire L2, and the other end of the coil of the repeater 1KA is connected to the neutral wire N.

[0034] The start contact 1KA2 of the relay 1KA is used to connect or disconnect the soft start controller.

[0035] When the running device needs to be started manually, such as Figure 3 As shown, connect points ① and ② in the transfer switch SA, turn the transfer switch SA to the manual start gear, and then press the start button SBF1. At this time, the coil of the repeater 1KA is energized, and the self-locking contact 1KA1 of the repeater 1KA is automatically attracted to form a self-locking circuit so that the coil of the repeater 1KA is continuously energized. Figure 1 and Figure 2 , and then the start contact 1KA2 of the repeater 1KA is continuously closed, thus connecting the soft start controller, and then the soft start controller starts the motor M in the main circuit; at the same time, the repeater 1KA will send a signal to the PLC remote control system as the operating status signal of the manual start of the equipment, so that the PLC can understand the operating status of the on-site equipment startup; refer to Figure 2 and Figure 3 When the manual operation state of the equipment needs to be cut off, press the stop button SBS1, the coil of the relay 1KA loses power, and its self-locking contact 1KA1 is disconnected, and the relay is in the state of manual operation. Figure 1 and Figure 2 At the same time, its starting contact 1KA2 is disconnected, the soft start controller is powered off, and the motor M stops running;

[0036] When the running equipment needs to start automatically, refer to Figure 3 , connect points ③ and ④ in the transfer switch SA, turn the transfer switch SA to the automatic gear, the PLC remote control system controls the PLC signal switch to automatically close, and the coil of the repeater 1KA is energized. Figure 1 and Figure 2 , its starting contact 1KA2 is closed and turns on the soft start controller, so that the soft start controller starts the motor M to make the running equipment run; when it is necessary to cut off the automatic running state of the equipment, refer to Figure 3 , the PLC remote control system cuts off the PLC signal switch, the coil of the repeater 1KA loses power, combined with Figure 1 and Figure 2 , its starting contact 1KA2 is disconnected, the soft start controller is powered off, and the motor M stops running.

[0037] On-site manual start-up and remote automatic start-up can meet different equipment startup requirements, making it convenient for staff to control the start and stop of equipment on-site or remotely. It has high flexibility and wide applicability.

[0038] Starting or stopping the motor M with a soft start controller allows the motor to start or stop smoothly, ensuring stable operation during startup or shutdown. This prevents excessive damage to the motor caused by sudden changes in operating state when the motor M starts or stops suddenly. Soft start controllers can include Starson ABB soft starters or Schneider soft start controllers.

[0039] In some preferred embodiments, in the manual start circuit, the start button SBF1 is connected in parallel with a local control start button SBF2. The local control start button SBF2 is located next to the operating equipment. For some equipment used in field operations, the equipment may be a certain distance from the on-site control room, and workers will often travel back and forth between the equipment and the on-site control room. Therefore, start buttons are provided in the on-site control room and next to the equipment, respectively. Whether the on-site workers are in the control room or next to the equipment, they can conveniently start the equipment. Therefore, a local control start button SBF2 is provided next to the equipment, and the start button SBF1 is provided in the on-site control room. Correspondingly, a local control stop button SBS2 is also provided next to the operating equipment to facilitate workers to stop the running equipment next to the equipment.

[0040] The stop button SBS1, local control stop button SBS2, start button SBF1, local control start button SBF2 and self-locking contact 1KA1 of repeater 1KA are connected in series, and the start button SBF1, local control start button SBF2 and self-locking contact 1KA1 of repeater 1KA are connected in parallel.

[0041] In another preferred embodiment, the control circuit includes a soft-start operating status display circuit. In this operating status display circuit, the coil of repeater 2KA is connected in series with the soft-start operating status switch R1A. The other end of the soft-start operating status switch R1A is connected to the live wire L2, and the other end of the coil of repeater 2KA is connected to the neutral wire N. When the soft-start controller is turned on, the soft-start operating status contact R1A of the soft-start controller automatically closes, energizing the coil of repeater 2KA and automatically sending a device startup status signal to the PLC in the remote control system.

[0042] On this basis, this embodiment further provides an operating status indicator light HR in the control circuit. The operating status indicator light HR is connected in series with the normally open contact 2KA1 of the repeater 2KA. When the coil of the repeater 2KA is energized, its normally open contact 2KA1 closes, and the operating status indicator light HR turns on. By observing the operating status indicator light HR, the staff can know that the equipment is in the operating state. When the equipment stops running, the soft start controller disconnects, and its soft start operating status contact R1A also automatically disconnects. The coil of the repeater 2KA1 loses power, its normally open contact 2KA1 disconnects, and the operating status indicator light HR turns off, indicating that the equipment is in the stopped state. Furthermore, to facilitate the staff to see the operating status indicator light HR from different locations, this embodiment provides operating status indicators both inside and outside the equipment control cabinet: the internal operating status indicator light 1HR and the external operating status indicator light 2HR.

[0043] The control circuit includes a soft-start fault display circuit. In this circuit, the coil of relay 3KA is connected in series with a soft-start fault status switch R2A. The other end of the soft-start fault status switch R2A is connected to the live wire L2, and the other end of the coil of relay 3KA is connected to the neutral wire N. When a fault occurs in the soft-start controller, soft-start fault status switch R2A automatically closes, connecting the coil of relay 3KA and transmitting a soft-start fault signal to the PLC in the remote control system for remote automated monitoring and early warning.

[0044] The control loop includes a comprehensive fault circuit. In this circuit, one end of the low-level signal switch 22KA and the start contact 3KA1 of the relay 3KA are both connected to the live wire L2. These connections are then connected in parallel to the coil of the relay 4KA, the other end of which is connected to the neutral wire N. When the start contact 3KA1 of the relay 3KA closes, the coil of the relay 4KA is energized, and the relay 4KA sends a signal to the PLC in the remote monitoring system, alerting the PLC to a fault in the on-site operating equipment. Soft-start faults are also aggregated in the comprehensive fault circuit, allowing the PLC to learn about soft-start faults from multiple sources to avoid misjudgments or missed detections.

[0045] In some preferred embodiments, in equipment operating in liquid environments, a low-liquid-level signal switch 22KA may also be provided in the integrated fault circuit to ensure the safe operation of power equipment such as water pumps and oil pumps. When the liquid level is too low, to prevent the water pumps and oil pumps from running idle, the liquid level control box transmits a low-liquid-level signal, effectively activating low-liquid-level signal switch 22KA. Closing low-liquid-level signal switch 22KA energizes the coil of relay 4KA, causing relay 4KA to operate and transmit a fault message to the PLC.

[0046] In some preferred embodiments, the control circuit also includes a motor protection circuit, which primarily comprises a motor protector power supply KQ. The coil of the motor protector power supply KQ is connected in parallel with the coil of the relay 4KA. The protection switch KQ of the motor protector power supply KQ is connected in series with the coil of the relay 4KA. Furthermore, the protection switch KQ of the motor protector power supply KQ, the low liquid level signal switch 22KA, and the start contact 3KA1 of the relay 3KA are connected in parallel. When motor M requires protection, the coil of the motor protector power supply KQ is energized, the protection switch KQ closes, the coil of the relay 4KA is energized, the integrated fault circuit is activated, and the relay 4KA transmits a fault signal to the PLC.

[0047] In some preferred embodiments, the manual start circuit includes a normally closed contact 4KA1 of relay 4KA. A PLC signal switch and the self-locking contact 1KA1 of relay 1KA are connected in parallel. A start button SBF1 and a local control start button SBF2 are connected in parallel, and then connected in series with the normally closed contact 4KA1 of relay 4KA and the coil of relay 1KA. This ensures that when the motor protection circuit activates, the motor start / stop circuit is disconnected, preventing motor M from accidentally starting.

[0048] In some preferred embodiments, the control circuit includes a running indicator light HR and a fault indicator light HY. The running indicator light HR is connected in series with the normally open contact 2KA1 of the repeater 2KA, and the fault indicator light HY is connected in series with the normally open contact 4KA2 of the repeater 4KA. One end of the normally open contact 2KA1 of the repeater 2KA and the other end of the normally open contact 4KA2 of the repeater 4KA are connected to the live wire L2, and the other ends of the running indicator light HR and the fault indicator light HY are connected to the neutral wire N. The running indicator light HR and the fault indicator light HY display the operating status and fault status of the motor.

[0049] In some preferred embodiments, an emergency stop button SBE is provided at the live wire L2 input end of the control circuit. When a device fails and needs to stop running immediately, the emergency stop button SB2 can be pressed to cut off the operation of the entire device.

[0050] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An intelligent remote local soft start control system, including a main circuit and a control circuit, characterized in that: Also includes a soft start controller, The control circuit includes a manual start circuit and an automatic start circuit. In the manual start circuit, the start button SBF1 is connected in parallel with the self-locking contact 1KA1 of the relay 1KA, one end of which is connected in series to the manual gear of the switch SA via the stop button SBS1, and the other end is connected in series to the coil of the relay 1KA; In the automatic start circuit, one end of the PLC signal switch is connected in series with the automatic gear of the transfer switch SA, and the other end is connected in series with the coil of the repeater 1KA. The PLC signal switch is connected in parallel with the start button SBF1 and the self-locking contact 1KA1 of the repeater 1KA; The other end of the transfer switch SA is connected to the live wire L2, and the other end of the coil of the repeater 1KA is connected to the neutral wire N. The start contact 1KA2 of the relay 1KA is used to connect or disconnect the soft start controller.

2. The intelligent remote local soft start control system according to claim 1, characterized in that: In the manual start circuit, the start button SBF1 is connected in parallel with the local control start button SBF2.

3. The intelligent remote local soft start control system according to claim 2, characterized in that: A local control stop button SBS2 is provided in the manual start circuit, and the local control stop button SBS2, the start button SBF1, the local control start button SBF2 and the self-locking contact 1KA1 of the repeater 1KA are connected in series, and the start button SBF1, the local control start button SBF2 and the self-locking contact 1KA1 of the repeater 1KA are connected in parallel.

4. The intelligent remote local soft start control system according to claim 3, characterized in that: The control circuit includes a soft start operation status display circuit. In the operation status display circuit, the coil of the repeater 2KA is connected in series with the soft start operation status switch R1A. The other end of the soft start operation status switch R1A is connected to the live wire L2, and the other end of the coil of the repeater 2KA is connected to the neutral wire N.

5. The intelligent remote local soft start control system according to claim 4, characterized in that: The control circuit includes a soft start fault display circuit. In the soft start fault display circuit, the coil of the repeater 3KA is connected in series with the soft start fault status switch R2A. The other end of the soft start fault status switch R2A is connected to the live wire L2, and the other end of the coil of the repeater 3KA is connected to the neutral wire N.

6. The intelligent remote local soft start control system according to claim 5, characterized in that: The control loop It includes a comprehensive fault circuit, in which one end of the low liquid level signal switch 22KA and the starting contact 3KA1 of the repeater 3KA are both connected to the live wire L2, and are connected in parallel with each other and then in series with the coil of the repeater 4KA. The other end of the coil of the repeater 4KA is connected to the neutral wire N.

7. The intelligent remote local soft start control system according to claim 6, characterized in that: The control loop It also includes a motor protector power supply KQ, the coil of which is connected in parallel with the coil of the repeater 4KA, and the protection switch KQ1 of the motor protector power supply KQ, the low liquid level signal switch 22KA and the starting contact 3KA1 of the repeater 3KA are connected in parallel with each other.

8. The intelligent remote local soft start control system according to claim 7, characterized in that: The manual start circuit is provided with a normally closed contact 4KA1 of the repeater 4KA, the PLC signal switch and the self-locking contact 1KA1 of the repeater 1KA are connected in parallel, the start button SBF1 and the local control start button SBF2 are connected in parallel and then connected in series with the normally closed contact 4KA1 of the repeater 4KA and the coil of the repeater 1KA.

9. The intelligent remote local soft start control system according to claim 8, characterized in that: The control circuit includes an operation indicator light HR and a fault indicator light HY. The operation indicator light HR is connected in series with the normally open contact 2KA1 of the repeater 2KA, and the fault indicator light HY is connected in series with the normally open contact 4KA2 of the repeater 4KA. One end of the normally open contact 2KA1 of the repeater 2KA and the other end of the normally open contact 4KA2 of the repeater 4KA are connected to the live wire L2, and the other ends of the operation indicator light HR and the fault indicator light HY are connected to the neutral wire N.

10. The intelligent remote local soft start control system according to claim 9, characterized in that: An emergency stop button SBE is provided at the live wire L2 input end of the control loop.

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