Remote control circuit for deep well pump

Abstract

The utility model belongs to the water pump control technical field, specifically relates to a deep well water pump remote control circuit, the control loop of the utility model includes remote starting circuit, local starting circuit, local and remote stop circuit, bypass contactor circuit and change-over switch, can select remote control or local control through change-over switch, when remote control, remote starting circuit, local and remote stop circuit are used for controlling the on-off of intermediate relay KM normally open auxiliary contact, when local control, local starting circuit, local and remote stop circuit are used for controlling the on-off of intermediate relay KM normally open auxiliary contact. The utility model can control the start and stop of motor through remote control soft starter, thereby has realized deep well water pump remote control. The circuit can realize the remote control to water pump, so as to save manpower and vehicle resources, and significantly improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of water pump control technology, specifically relating to a remote control circuit for a deep well water pump. Background Technology

[0002] Deep well pump rooms are usually located in remote areas, and the pumps and power supply are far from the pump room control room. Each time the pumps are started or stopped, the pumps need to be started and stopped locally, which is time-consuming, labor-intensive, and consumes manpower and vehicle resources.

[0003] The circuit diagram for the start / stop control of deep well water pumps used in the water supply workshop of a steel plant is as follows: Figure 1 As shown, the startup process is as follows: Pressing the start switch SB1 energizes the coil of intermediate contactor KA1, closing normally open contacts 8 and 12. The soft starter receives the start signal and begins to start, gradually increasing the output voltage of the thyristor to accelerate the motor. When the motor reaches its rated speed, soft starter contacts 8 and 9 close, energizing the coil of intermediate contactor KA2. Normally open contacts 8 and 12 of intermediate contactor KA2 close, energizing the coil of bypass contactor KM. Bypass contactor KM closes, and motor M switches to bypass operation, completing the local startup of the deep well pump. The start switch SB1 in the above control circuit requires manual control. How to achieve remote mobile phone control on the basis of local control is an urgent problem to be solved. Utility Model Content

[0004] The main purpose of this invention is to provide a remote control circuit for a deep well water pump, which enables remote control of the pump using a mobile phone, thereby saving manpower and vehicle resources and significantly improving work efficiency.

[0005] The technical problem to be solved by this utility model is achieved by the following technical solution: a remote control circuit for a deep well water pump, characterized in that it includes an AC power supply, a soft starter, a motor, a switching bypass, and a control circuit;

[0006] The local start circuit, local and remote stop circuits, and bypass contactor circuit are connected in parallel and are all connected to the L terminal of the AC power supply through the stop switch SB2.

[0007] The bypass contactor circuit includes the normally open contacts of intermediate relays KM and KA2 connected in series.

[0008] An intermediate relay KM normally open auxiliary contact is connected in series on the on / off bypass;

[0009] An intermediate relay KA2 is provided on the local and remote stop circuits;

[0010] The selector switch is used to select between remote control and local control;

[0011] During remote control, the remote start circuit, local circuit, and remote stop circuit are used to control the opening and closing of the normally open auxiliary contact of the intermediate relay KM;

[0012] In local control, the local start circuit, local and remote stop circuits are used to control the opening and closing of the normally open auxiliary contact of the intermediate relay KM.

[0013] In a preferred embodiment of this invention, the changeover switch includes a first set of contacts, a second set of contacts, and a third set of contacts;

[0014] The start input terminal of the soft starter is connected to the normally open contact of the intermediate relay KA1;

[0015] The remote start circuit includes a 4G remote control switch, a normally open contact of the 4G remote control switch, and an intermediate relay KA4. The two ends of the 4G remote control switch are respectively connected to the L end and N end of the AC power supply. The normally open contact of the 4G remote control switch and the intermediate relay KA4 are connected in series and then connected in parallel to the two ends of the 4G remote control switch.

[0016] The 4G remote control switch is used to receive control commands sent by a mobile phone, including start commands and stop commands.

[0017] One end of the first set of normally open contacts of intermediate relay KA4 is connected to the L terminal of the AC power supply, and the other end is connected to one end of the first set of contacts of the changeover switch. The other end of the first set of contacts of the changeover switch is connected to one end of the coil of intermediate relay KA1, and the other end of the coil of intermediate relay KA1 is connected to the N terminal of the AC power supply.

[0018] The local start circuit includes a start switch SB1, one end of which is connected to the L terminal of the AC power supply, and the other end is connected to the coil of the intermediate relay KA1 through a second set of contacts.

[0019] The normally open contact of intermediate relay KA1 is connected in series with the normally closed contact of contactor KM and then connected in parallel across the two ends of start switch SB1;

[0020] The local and remote stop circuits include the second set of normally open contacts of KA4, the normally open contacts of the soft starter, and the intermediate relay KA2 connected in series. The normally open contacts of the intermediate relay KA2 are connected in parallel with the normally open contacts of the soft starter. The third set of contacts is connected in parallel with the second set of normally open contacts of the intermediate relay KA4. In the above circuit, the selector switch is used to switch between local and remote control. When remote control is activated, the selector switch is switched to the remote position. At this time, the first set of contacts of the selector switch is closed. After receiving the start command information sent by the mobile phone, the normally open contact of the 4G remote control switch is closed, and the AC power supply is connected to the circuit of the intermediate relay KA4. The coil of KA4 is energized, the first set of normally open contacts of the intermediate relay KA4 is closed, the coil of the intermediate relay KA1 is energized, the normally open contact of KA1 is closed, and the soft starter runs. The normally open contact of the intermediate relay KA4 replaces the function of the start switch, thereby realizing remote control of the deep well pump. This circuit can realize remote control of the water pump, so as to save manpower and vehicle resources and significantly improve work efficiency. The intermediate relay KA4 has its coil energized and de-energized by a 4G remote control switch.

[0021] In a preferred embodiment of this invention, the AC power supply is connected to the soft starter via a circuit breaker QF1.

[0022] In a preferred embodiment of this invention, the control circuit is connected to an AC power supply via a control circuit breaker QF2.

[0023] Preferably, the 4G remote control switch of this invention is a modular relay with a built-in 4G network. The 4G remote control switch communicates with a mobile phone via the 4G network, receives commands from the phone, and can autonomously search for networks after being powered on, allowing users to control the 4G remote control switch anytime, anywhere via their mobile phones.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows: In the circuit of this utility model, the control circuit includes a remote start circuit, a local start circuit, a local and remote stop circuit, a bypass contactor circuit, and a changeover switch. The local start circuit, the local and remote stop circuit, and the bypass contactor circuit are connected in parallel and are all connected to the L terminal of the AC power supply through the stop switch SB2. The bypass contactor circuit includes normally open contacts of intermediate relays KM and KA2 connected in series. A normally open auxiliary contact of intermediate relay KM is connected in series on the bypass circuit. An intermediate relay KA2 is provided on the local and remote stop circuit. The changeover switch is used to select remote control or local control. In remote control mode, the remote start circuit, the local and remote stop circuit are used to control the on / off state of the normally open auxiliary contact of intermediate relay KM. In local control mode, the local start circuit, the local and remote stop circuit are used to control the on / off state of the normally open auxiliary contact of intermediate relay KM. This utility model can control the start and stop of the motor through a remote control soft starter, thereby realizing remote control of the deep well pump. This circuit enables remote control of the water pump, thereby saving manpower and vehicle resources and significantly improving work efficiency. Attached Figure Description

[0025] Figure 1 This refers to the control circuit for deep well water pumps in existing technologies.

[0026] Figure 2 This utility model relates to a remote control circuit for a deep well water pump. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0028] like Figure 2 As shown, a remote control circuit for a deep well water pump includes an AC power supply, a soft starter, a motor, an on / off bypass, and a control circuit.

[0029] The AC power supply is connected to the motor via a soft starter, and the AC power supply is also connected to the motor via an on / off bypass.

[0030] The control circuit is connected to the L and N terminals of the AC power supply, and is also connected to the AC power supply and the soft starter, for controlling the start and stop of the motor via the soft starter.

[0031] The control circuit includes a remote start circuit, a local start circuit, a local and remote stop circuit, a bypass contactor circuit, and a changeover switch. The remote start circuit is connected to a mobile phone for communication.

[0032] The local start circuit, local and remote stop circuits, and bypass contactor circuit are connected in parallel and are all connected to the L terminal of the AC power supply through the stop switch SB2.

[0033] The bypass contactor circuit includes the normally open contacts of intermediate relays KM and KA2 connected in series.

[0034] An intermediate relay KM normally open auxiliary contact is connected in series on the on / off bypass.

[0035] An intermediate relay KA2 is provided on the local and remote stop circuits.

[0036] The selector switch is used to select between remote control and local control.

[0037] In remote control mode, the remote start circuit, local and remote stop circuits are used to control the on / off state of the normally open auxiliary contact of the intermediate relay KM.

[0038] In local control, the local start circuit, local and remote stop circuits are used to control the opening and closing of the normally open auxiliary contact of the intermediate relay KM.

[0039] The changeover switch includes a first set of contacts, a second set of contacts, and a third set of contacts.

[0040] The start input terminal of the soft starter is connected to the normally open contact of the intermediate relay KA1.

[0041] The remote start circuit includes a 4G remote control switch, a normally open contact of the 4G remote control switch, and an intermediate relay KA4. The two ends of the 4G remote control switch are respectively connected to the L end and N end of the AC power supply. The normally open contact of the 4G remote control switch and the intermediate relay KA4 are connected in series and then connected in parallel across the two ends of the 4G remote control switch.

[0042] The 4G remote control switch is used to receive control commands sent by a mobile phone, including start and stop commands.

[0043] One end of the first set of normally open contacts of intermediate relay KA4 is connected to the L terminal of the AC power supply, and the other end is connected to one end of the first set of contacts of the changeover switch. The other end of the first set of contacts of the changeover switch is connected to one end of the coil of intermediate relay KA1, and the other end of the coil of intermediate relay KA1 is connected to the N terminal of the AC power supply.

[0044] The local start circuit includes a start switch SB1. One end of the start switch SB1 is connected to the L terminal of the AC power supply, and the other end is connected to the coil of the intermediate relay KA1 through the second set of contacts.

[0045] The normally open contact of intermediate relay KA1 is connected in series with the normally closed contact of contactor KM and then connected in parallel across the two ends of start switch SB1.

[0046] The local and remote stop circuits include the second group of normally open contacts of KA4, the normally open contacts of the soft starter, and the intermediate relay KA2 connected in series. The normally open contacts of the intermediate relay KA2 are connected in parallel with the normally open contacts of the soft starter. The third group of contacts is connected in parallel with the second group of normally open contacts of the intermediate relay KA4.

[0047] Specifically, such as Figure 2 As shown, one end of the coil of intermediate relay KA4 is connected to the L terminal of the AC power supply, and the other end is connected to the N terminal of the AC power supply; one end of the normally open contact of the 4G remote control switch is connected to the L terminal of the AC power supply, and the other end is connected to one end of the coil of intermediate relay KA4, and the other end of the coil of intermediate relay KA4 is connected to the N terminal of the AC power supply; one end of the normally open contacts 5 and 9 of intermediate relay KA4 is connected to the L terminal of the AC power supply, and the other end is connected to one end of the first set of contacts 3 and 4 of the changeover switch; the other end of the changeover switch is connected to one end of the coil of intermediate relay KA1, and the other end of the coil of intermediate relay KA1 is connected to the N terminal of the AC power supply; this part of the components constitutes a remote start circuit.

[0048] The stop switch SB2 is connected at one end to the L terminal of the AC power supply and at the other end to one end of the start switch SB1. The other end of the start switch SB1 is connected to one end of the second set of normally open contacts 7 and 8 of the changeover switch. The other end of the changeover switch is connected to one end of the coil of the intermediate relay KA1. The other end of the coil of the intermediate relay KA1 is connected to the N terminal of the AC power supply. The normally open contact of the intermediate relay KA1 and the normally closed contact of the contactor KM are connected in series and then connected to the start button SB1; this part of the components constitutes the local start circuit.

[0049] The stop switch SB2 is connected at one end to the L terminal of the AC power supply and at the other end to one end of the normally open contacts 8 and 12 of the intermediate relay KA4. The other end of the normally open contacts 8 and 12 of the intermediate relay KA4 is connected to one end of the normally open contacts 8 and 9 of the soft starter. The other end of the normally open contacts 8 and 9 of the soft starter is connected to the N terminal of the AC power supply through the coil of the intermediate relay KA2. The third set of contacts 1 and 2 of the changeover switch SA is connected in parallel with the normally open contacts 8 and 12 of the intermediate relay KA4, and the normally open contacts 5 and 9 of the intermediate relay KA2 are connected in parallel with the normally open contacts 8 and 9 of the soft starter. This part of the components constitutes the local and remote stop circuits.

[0050] One end of the stop switch SB2 is connected to the L terminal of the AC power supply, and the other end is connected to one end of the normally open contacts 8 and 12 of the intermediate relay KA2. The other end of the normally open contacts 8 and 12 of the intermediate relay KA4 is connected to the N terminal of the AC power supply through the coil of the bypass contactor KM. This part of the components constitutes the bypass contactor circuit.

[0051] The AC power supply is connected to the soft starter via circuit breaker QF1.

[0052] The control circuit is connected to the AC power supply through the control circuit breaker QF2.

[0053] The 4G remote control switch is a modular relay with a built-in 4G network. This technical solution conducts research on the application technology of the 4G remote control switch and analyzes its technical principle. The 4G remote control switch is a modular relay with a built-in 4G network. After being powered on, the 4G remote control switch autonomously searches for a network, its indicator light stays on, and it enters standby mode. Users can easily add and manage devices by scanning the unique QR code (one code per device) on their smartphones using a WeChat mini-program. After adding the device, users can remotely control the 4G remote control switch anytime, anywhere via their mobile phones, enabling remote control of the deep well water pump.

[0054] The working principle of the entire device is as follows: When the control circuit breaker QF2 is closed, the 4G remote control switch is in a energized standby state. The changeover switch SA is used to switch between local control and remote control. In this embodiment, the changeover switch includes contacts 1, 2, 3, 4, 7, and 8. When contacts 1, 2, 7, and 8 are closed and conducting, the control circuit is in local control mode; when contacts 3 and 4 are closed and conducting, the control circuit is in remote control mode; when contacts 3 and 4 are conducting, contacts 1, 2, 7, and 8 are in a non-conducting state.

[0055] When the control circuit selector switch SA is switched to the local position, it is local control. The control process is as follows: Pressing the start button SB1 energizes the coil of intermediate contactor KA1, and the normally open contact of intermediate contactor KA1 conducts. The soft starter receives the start signal and begins to start, gradually increasing the output voltage of the thyristor, causing the motor M to gradually accelerate. When the motor M reaches its rated speed, the normally open contacts 8 and 9 of the soft starter conduct, energizing the coil of intermediate contactor KA2, and the normally open contact of intermediate contactor KA2 conducts. The bypass contactor KM coil is energized, and the bypass contactor KM closes, switching the motor M to bypass operation. The local start of the deep well pump is complete. Pressing the stop button SB2 de-energizes the coil of intermediate contactor KA2, and the normally open contact of intermediate contactor KA2 does not conduct. The bypass contactor KM coil is de-energized, and the bypass contactor KM opens, stopping the motor M.

[0056] When the control circuit selector switch SA is switched to the remote position, it is remote control. The control process is as follows: the mobile phone sends a start command information, the normally open contact of the 4G remote control switch is turned on, the coil of intermediate relay KA4 is energized, the normally open contact of intermediate relay KA4 is closed, the coil of intermediate relay KA1 is energized, the normally open contact of intermediate contactor KA1 is turned on, the soft starter receives the start signal and starts to start. The output voltage of the thyristor gradually increases, causing the motor M to gradually accelerate. When the motor M reaches the rated speed, the normally open contacts 8 and 9 of the soft starter are turned on, the coil of intermediate contactor KA2 is energized, the normally open contact of intermediate contactor KA2 is turned on, the coil of bypass contactor KM is energized, the bypass contactor KM is closed, the motor M switches to bypass operation, and the remote control start of the deep well water pump is completed. When the mobile phone sends a stop command, the normally open contact of the 4G remote control switch opens, the coil of intermediate relay KA4 is de-energized, the normally open contacts 8 and 12 of intermediate relay KA4 open, the coil of intermediate contactor KA2 is de-energized, the normally open contact of intermediate contactor KA2 opens, the coil of bypass contactor KM is de-energized, the bypass contactor trips, and motor M stops.

[0057] The soft starter's startup time is approximately 2 seconds. Utilizing this time difference, the normally open contacts 8 and 12 of the intermediate relay KA4 are already closed and conducting before the coil of the intermediate contactor KA2 is energized, thus not affecting the startup of the intermediate relay KA2 coil circuit. This circuit uses the time difference of the soft starter to allow the normally open contacts 8 and 12 of the intermediate relay KA4 to replace the start switch and stop switch functions. Therefore, remotely controlling the energization and de-energization of the intermediate relay KA4 controls the start and stop of the deep well pump, thereby achieving remote control of the deep well pump.

[0058] This circuit modification is simple to implement and requires a small investment of only a few hundred yuan. It enables remote control of deep well water pumps, saving manpower and vehicle resources and significantly improving work efficiency.

[0059] The benefits of this technical solution, as demonstrated in a trial at a deep well pump room in a steel plant's water supply workshop, are as follows: On average, the pump needs to be started and stopped 12 times per month. Each time, it saves 1 man-hour for the operator, 1 man-hour for the driver, and 4 kilometers of fuel consumption for the vehicle. Over the course of a year, it saves 144 man-hours for the operator, 144 man-hours for the driver, and 576 kilometers of fuel consumption for the vehicle.

Claims

1. A remote control circuit for a deep well water pump, characterized in that: This includes AC power supply, soft starter, motor, on / off bypass, and control circuit; The AC power supply is connected to the motor via a soft starter, and the AC power supply is also connected to the motor via a switching bypass. The control circuit is connected to the AC power supply and the soft starter, and is used to control the start and stop of the motor through the soft starter; The control circuit is connected to the L and N terminals of the AC power supply. The control circuit includes a remote start circuit, a local start circuit, a local and remote stop circuit, a bypass contactor circuit, and a changeover switch. The local start circuit, local and remote stop circuits, and bypass contactor circuit are connected in parallel and are all connected to the L terminal of the AC power supply through the stop switch SB2. The bypass contactor circuit includes the normally open contacts of intermediate relays KM and KA2 connected in series. An intermediate relay KM normally open auxiliary contact is connected in series on the on / off bypass; An intermediate relay KA2 is provided on the local and remote stop circuits; The selector switch is used to select between remote control and local control; During remote control, the remote start circuit, local circuit, and remote stop circuit are used to control the opening and closing of the normally open auxiliary contact of the intermediate relay KM; In local control, the local start circuit, local and remote stop circuits are used to control the opening and closing of the normally open auxiliary contact of the intermediate relay KM.

2. The remote control circuit for a deep well pump according to claim 1, characterized in that: The changeover switch includes a first set of contacts, a second set of contacts, and a third set of contacts; The start input terminal of the soft starter is connected to the normally open contact of the intermediate relay KA1; The remote start circuit includes a 4G remote control switch, a normally open contact of the 4G remote control switch, and an intermediate relay KA4. The two ends of the 4G remote control switch are respectively connected to the L end and N end of the AC power supply. The normally open contact of the 4G remote control switch and the intermediate relay KA4 are connected in series and then connected in parallel to the two ends of the 4G remote control switch. The 4G remote control switch is used to receive control commands sent by a mobile phone, including start commands and stop commands. One end of the first set of normally open contacts of intermediate relay KA4 is connected to the L terminal of the AC power supply, and the other end is connected to one end of the first set of contacts of the changeover switch. The other end of the first set of contacts of the changeover switch is connected to one end of the coil of intermediate relay KA1, and the other end of the coil of intermediate relay KA1 is connected to the N terminal of the AC power supply. The local start circuit includes a start switch SB1, one end of which is connected to the L terminal of the AC power supply, and the other end is connected to the coil of the intermediate relay KA1 through a second set of contacts. The normally open contact of intermediate relay KA1 is connected in series with the normally closed contact of contactor KM and then connected in parallel across the two ends of start switch SB1; The local and remote stop circuits include the second group of normally open contacts of KA4, the normally open contacts of the soft starter, and the intermediate relay KA2 connected in series. The normally open contacts of the intermediate relay KA2 are connected in parallel with the normally open contacts of the soft starter. The third group of contacts is connected in parallel with the second group of normally open contacts of the intermediate relay KA4.

3. The remote control circuit for a deep well pump according to claim 1, characterized in that: The AC power supply is connected to the soft starter via circuit breaker QF1.

4. The remote control circuit for a deep well pump according to claim 1, characterized in that: The control circuit is connected to the AC power supply through the control circuit breaker QF2.

5. The remote control circuit for a deep well pump according to claim 2, characterized in that: The 4G remote control switch is a modular relay with a built-in 4G network.

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