Water pump control device and method

Abstract

The invention discloses a water pump control device and method. The device comprises an abnormal cut-off circuit and a water pump control circuit. The circuit is cut off abnormally, so that the circuit is cut off in time after the water pump works abnormally, the water pump is protected, and the water pump is prevented from being damaged due to abnormal heating caused by suffocation.

Description

Technical Field

[0001] The present invention relates to the field of mechanical automatic control, and more specifically, to a water pump control device and method. Background Art

[0002] Nowadays, water pumps are widely used in various aspects of daily production and life. In the process of using water pumps, it is often necessary to control and adjust the water pumps. Therefore, water pumps are often used in conjunction with water pump control circuits to control and adjust the water pumps.

[0003] Traditional water pumps are widely used and have been in use for a long time, so they often break down. Especially when the pump body is working, the water pump motor works but the water pump cannot work to pressurize, resulting in a long period of water pressure without changing. The air holding phenomenon causes the corresponding parts of the water pump to heat up, further aggravating the air holding phenomenon of the water pump and damaging the water pump motor. If the water pump is damaged, it will cause abnormal operation and unstable water supply pressure, making daily production and life impossible.

[0004] The prior art discloses a control circuit for realizing automatic rotation of water pumps, including a power module, a communication module, an input module, a control module and a central processing module. The circuit does not take into account the phenomenon of water pump holding air, nor does it take into account the problem that the water pump holding air phenomenon makes it difficult to automatically rotate the water pump. Summary of the invention

[0005] The present invention aims at the defects that the water pumps in the prior art cannot overcome the air holding phenomenon and cannot cope with the problem after the water pumps are damaged; and provides a water pump control device and method.

[0006] The primary purpose of the present invention is to solve the above technical problems. The technical solution of the present invention is as follows:

[0007] A water pump control device, comprising: a first water pump motor M1, a second water pump motor M2, a first contactor 1KM, a second contactor 2KM, a first button 1SB, a second button 2SB, a third button 3SB, a fourth button 4SB, a first time relay 1KT, a second time relay 2KT, a fifth time relay 5KT, a sixth time relay 6KT, a first knob multi-speed switch SAC1, a transformer, an upper limit switch, a lower limit switch, a first electromagnetic relay 1KA, a second electromagnetic relay 2KA, a seventh time relay 7KT, a protection switch, a fifth electromagnetic relay 5KA, and a third switch FQ;

[0008] The first water pump motor M1 is connected to the three-phase power supply through the main contacts of the first contactor 1KM, and the second water pump motor M2 is connected to the three-phase power supply through the main contacts of the second contactor 2KM;

[0009] One phase of the three-phase power supply is connected to the first input end of the first knob multi-speed switch SAC1 and the fourth input end of the first knob multi-speed switch SAC1;

[0010] One phase of the three-phase power supply is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the second end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the second end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the second input end of the first knob multi-speed switch SAC1 and the third input end of the first knob multi-speed switch SAC1;

[0011] One phase of the three-phase power supply is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the fourth end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the fourth end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fifth input end of the first knob multi-speed switch SAC1 and the sixth input end of the first knob multi-speed switch SAC1;

[0012] The first output end of the first knob multi-speed switch SAC1 is connected to one end of the first button 1SB, the other end of the first button 1SB is connected to one end of the second button 2SB and one end of the normally open auxiliary contact of the first contactor 1KM, the other end of the second button 2SB, the other end of the normally open auxiliary contact of the first contactor 1KM, the second output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the first time relay 1KT are connected to one end of the normally closed auxiliary contact of the second contactor 2KM, the other end of the normally closed auxiliary contact of the second contactor 2KM is connected to the fifth time relay 1KT. The first contactor 1KM coil is connected to the first time relay 5KT, and the other end of the first time relay 1KT coil is connected to the neutral line; the third output end of the first knob multi-speed switch SAC1 is connected to one end of the time delay normally open auxiliary contact of the first time relay 1KT and one end of the first time relay 1KT coil, and the other end of the first time relay 1KT coil is connected to the neutral line;

[0013] The fourth output end of the first knob multi-speed switch SAC1 is connected to one end of the third button 3SB, the other end of the third button 3SB is connected to one end of the fourth button 4SB and one end of the normally open auxiliary contact of the second contactor 2KM, the other end of the fourth button 4SB, the other end of the normally open auxiliary contact of the second contactor 2KM, the fifth output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the second time relay 2KT are connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the other end of the normally closed auxiliary contact of the first contactor 1KM is connected to the sixth output end of the first knob multi-speed switch SAC1, the other end of the normally closed auxiliary contact of the second time relay 2KT is connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the normally closed auxiliary contact of the first contactor 1KM. One end of the time relay 6KT time delay normally closed auxiliary contact is connected, the other end of the sixth time relay 6KT time delay normally closed auxiliary contact is connected to one end of the sixth time relay 6KT coil and one end of the second contactor 2KM coil, the other end of the sixth time relay 6KT coil and the other end of the second contactor 2KM coil are connected to the neutral line; the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the second time relay 2KT time delay normally open auxiliary contact and one end of the second time relay 2KT coil, and the other end of the second time relay 2KT coil is connected to the neutral line;

[0014] One phase of the three-phase power supply is connected to a first end of the transformer, and a second end of the transformer is connected to a neutral line;

[0015] The third end of the transformer is connected to one end of the third switch FQ and one end of the protection switch, the other end of the third switch FQ is connected to one end of the lower limit switch, one end of the upper limit switch, and the fifth end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the other end of the lower limit switch and the sixth end of the normally open auxiliary contact of the first electromagnetic relay 1KA are connected to one end of the normally closed auxiliary contact of the second electromagnetic relay 2KA, the other end of the normally closed auxiliary contact of the second electromagnetic relay 2KA is connected to one end of the delayed normally closed auxiliary contact of the seventh time relay 7KT, the other end of the delayed normally closed auxiliary contact of the seventh time relay 7KT is connected to one end of the coil of the seventh time relay 7KT and one end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the seventh time relay 7KT, the other end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the second electromagnetic relay 2KA, and the other end of the coil of the fifth electromagnetic relay 5KA are connected to the fourth end of the transformer; the other end of the upper limit switch is connected to one end of the coil of the second electromagnetic relay 2KA; the other end of the protection switch is connected to one end of the coil of the fifth electromagnetic relay 5KA.

[0016] Furthermore, it also includes: a second knob multi-speed switch SAC2, a third time relay 3KT, and a fourth time relay 4KT;

[0017] One phase of the three-phase power supply is connected to the second input terminal of the second knob multi-speed switch SAC2, the eighth input terminal of the second knob multi-speed switch SAC2, and the thirteenth input terminal of the second knob multi-speed switch SAC2; the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fourth input terminal of the second knob multi-speed switch SAC2, the fifth input terminal of the second knob multi-speed switch SAC2, and the sixth input terminal of the second knob multi-speed switch SAC2, and the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the tenth input terminal of the second knob multi-speed switch SAC2, the eleventh input terminal of the second knob multi-speed switch SAC2, and the twelfth input terminal of the second knob multi-speed switch SAC2;

[0018] The second output end of the second knob multi-speed switch SAC2 is connected to the first input end of the first knob multi-speed switch SAC1, the fourth output end of the second knob multi-speed switch SAC2 is connected to the second input end of the first knob multi-speed switch SAC1, and the sixth output end of the second knob multi-speed switch SAC2 is connected to the third input end of the first knob multi-speed switch SAC1; the eighth output end of the second knob multi-speed switch SAC2 is connected to the fourth input end of the first knob multi-speed switch SAC1, the tenth output end of the second knob multi-speed switch SAC2 is connected to the fifth input end of the first knob multi-speed switch SAC1, and the twelfth output end of the second knob multi-speed switch SAC2 is connected to the sixth input end of the first knob multi-speed switch SAC1;

[0019] The fifth output end of the second knob multi-speed switch SAC2 is connected to the first end of the delayed normally closed auxiliary contact of the third time relay 3KT and the first end of the delayed normally open auxiliary contact of the third time relay 3KT, the second end of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to the second output end of the first knob multi-speed switch SAC1, and the second end of the delayed normally open auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the first time relay 1KT;

[0020] The eleventh output terminal of the second knob multi-speed switch SAC2 is connected to the third terminal of the delayed normally closed auxiliary contact of the third time relay 3KT and the third terminal of the delayed normally open auxiliary contact of the third time relay 3KT, the fourth terminal of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the second time relay 2KT, and the fourth terminal of the delayed normally open auxiliary contact of the third time relay 3KT is connected to the fifth output terminal of the first knob multi-speed switch SAC1;

[0021] The thirteenth output end of the second knob multi-speed switch SAC2 is connected to the fifth end of the third time relay 3KT delayed normally open auxiliary contact and one end of the third time relay 3KT coil, the sixth end of the third time relay 3KT delayed normally open auxiliary contact is connected to one end of the fourth time relay 4KT coil, the other end of the third time relay 3KT coil is connected to one end of the fourth time relay 4KT normally closed auxiliary contact, the other end of the fourth time relay 4KT normally closed auxiliary contact and the other end of the fourth time relay 4KT coil are connected to the neutral line.

[0022] Furthermore, it also includes: a sixth electromagnetic relay 6KA, a seventh electromagnetic relay 7KA, a fourth indicator light buzzer 4HR, a fifth indicator light buzzer 5HR, and a reset switch 5SB;

[0023] One phase of the three-phase power supply is connected to one end of the reset switch 5SB, the other end of the reset switch 5SB is connected to one end of the delayed normally open auxiliary contact of the fifth time relay 5KT, one end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA, one end of the delayed normally open auxiliary contact of the sixth time relay 6KT, and one end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA, the other end of the delayed normally open auxiliary contact of the fifth time relay 5KT and the other end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA are connected to one end of the coil of the sixth electromagnetic relay 6KA and one end of the fourth indicator light buzzer 4HR, the other end of the coil of the sixth electromagnetic relay 6KA and the other end of the fourth indicator light buzzer 4HR are connected to the neutral line; the other end of the delayed normally open auxiliary contact of the sixth time relay 6KT and the other end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA are connected to one end of the coil of the seventh electromagnetic relay 7KA and one end of the fifth indicator light buzzer 5HR, the other end of the coil of the seventh electromagnetic relay 7KA and the other end of the fifth indicator light buzzer 5HR are connected to the neutral line.

[0024] Furthermore, it also includes: a first indicator light 1HG, a second indicator light 2HG; a first thermal relay 1KH, a second thermal relay 2KH; a second indicator light buzzer 2HR, a third electromagnetic relay 3KA; a fourth electromagnetic relay 4KA, a third indicator light buzzer 3HR; a third indicator light 1HR; a first switch 1QF, a second switch 2QF;

[0025] One end of the first indicator light 1HG is connected to one end of the first contactor 1KM coil, and the other end of the first indicator light 1HG is connected to the other end of the first contactor 1KM coil;

[0026] One end of the second indicator light 2HG is connected to one end of the coil of the second contactor 2KM, and the other end of the second indicator light 2HG is connected to the other end of the coil of the second contactor 2KM.

[0027] One end of the main contact of the first thermal relay 1KH is connected to the first water pump motor M1, the other end of the main contact of the first thermal relay 1KH is connected to one end of the main contact of the first contactor 1KM, one end of the main contact of the second thermal relay 2KH is connected to the second water pump motor M2, and the other end of the main contact of the second thermal relay 2KH is connected to the second contactor 2KM;

[0028] The other end of the coil of the first contactor 1KM is connected to one end of the normally closed auxiliary contact of the first thermal relay 1KH, and the other end of the normally closed auxiliary contact of the first thermal relay 1KH is connected to the neutral line;

[0029] The other end of the coil of the second contactor 2KM is connected to one end of the normally closed auxiliary contact of the second thermal relay 2KH, and the other end of the normally closed auxiliary contact of the second thermal relay 2KH is connected to the neutral line.

[0030] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the first thermal relay 1KH, the other end of the normally open auxiliary contact of the first thermal relay 1KH is connected to one end of the coil of the third electromagnetic relay 3KA, and the other end of the coil of the third electromagnetic relay 3KA is connected to the neutral line;

[0031] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, the other end of the normally open auxiliary contact of the third electromagnetic relay 3KA is connected to one end of the second indicator light buzzer 2HR, and the other end of the second indicator light buzzer 2HR is connected to the neutral line.

[0032] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the second thermal relay 2KH, the other end of the normally open auxiliary contact of the second thermal relay 2KH is connected to one end of the coil of the fourth electromagnetic relay 4KA, and the other end of the coil of the fourth electromagnetic relay 4KA is connected to the neutral line;

[0033] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA, the other end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA is connected to one end of the third indicator light buzzer 3HR, and the other end of the third indicator light buzzer 3HR is connected to the neutral line.

[0034] One phase of the three-phase power supply is connected to one end of the third indicator light 1HR, and the other end of the third indicator light 1HR is connected to the neutral line.

[0035] The three-phase power supply is connected to one end of the first switch 1QF, and the other end of the first switch 1QF is connected to the other end of the main contact of the first contactor 1KM;

[0036] The three-phase power supply is connected to one end of the second switch 2QF, and the other end of the second switch 2QF is connected to the other end of the main contact of the second contactor 2KM.

[0037] Furthermore, it also includes: a first fuse 1FU, a second fuse 2FU, and a third fuse 3FU;

[0038] One phase of the three-phase power supply is connected to one end of the first fuse 1FU, and the other end of the first fuse 1FU is connected to one end of the reset switch 5SB, the first end of the transformer, one end of the third indicator light 1HR, one end of the normally open auxiliary contact of the first thermal relay 1KH, one end of the normally open auxiliary contact of the second thermal relay 2KH, one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, and one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA;

[0039] The other end of the main contact of the first contactor 1KM is connected to one end of the second fuse 2FU, and the other end of the second fuse 2FU is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA and the second input end of the second knob multi-speed switch SAC2;

[0040] One end of the third fuse 3FU is connected to the other end of the second contactor 2KM main contact, and the other end of the third fuse 3FU is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the eighth input end of the second knob multi-speed switch SAC2, and the thirteenth input end of the second knob multi-speed switch SAC2.

[0041] A water pump control method, comprising:

[0042] S101: Select the first gear or the second gear of the first knob multi-gear switch SAC1. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, and the normally open auxiliary contact of the first electromagnetic relay 1KA is closed;

[0043] S102: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing;

[0044] S103: When the first gear of the first knob multi-speed switch SAC1 is selected, when the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally closed auxiliary contact of the fifth time relay 5KT is disconnected, and the first contactor 1KM coil is de-energized; the main contact of the first contactor 1KM is disconnected, and the first water pump motor M1 stops working; when the second gear of the first knob multi-speed switch SAC1 is selected, when the sixth time relay 6KT reaches the preset working time of 6KT, the delayed normally closed auxiliary contact of the sixth time relay 6KT is disconnected, the second contactor 2KM coil is de-energized, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working;

[0045] S104: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing;

[0046] S105: Repeat steps S102 to S104 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0047] Further, in step S105, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working;

[0048] In step S105, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

[0049] A water pump control method, comprising:

[0050] S201: Select the first gear of the second knob multi-gear switch SAC2. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is closed, and the third time relay 3KT starts timing;

[0051] S202: The coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, and the first water pump motor M1 starts to work;

[0052] S203: When the third time relay 3KT reaches the 3KT preset time, the delayed normally closed auxiliary contact of the third time relay 3KT is disconnected, and the delayed normally open auxiliary contact of the third time relay 3KT is closed; the first contactor 1KM coil loses power, the first contactor 1KM main contact is disconnected, and the first water pump motor M1 stops working; the second contactor 2KM coil is energized, the second contactor 2KM main contact is closed, and the second water pump motor M2 starts working; the fourth time relay 4KT starts timing;

[0053] S204: When the fourth time relay 4KT reaches the 4KT preset time, the normally closed auxiliary contact of the fourth time relay 4KT is closed, the third time relay 3KT starts timing, the delayed normally closed auxiliary contact of the third time relay 3KT is closed, and the delayed normally open auxiliary contact of the third time relay 3KT is disconnected; the second contactor 2KM coil loses power, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working; the first contactor 1KM coil is energized, the first contactor 1KM main contact is closed, and the first water pump motor M1 starts working;

[0054] S205: Repeat steps S203 to S204 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0055] Further, in step S205, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working;

[0056] In step S205, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

[0057] Further, when the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally open auxiliary contact of the fifth time relay 5KT is closed, the coil of the sixth electromagnetic relay 6KA is energized, the normally open auxiliary contact of the sixth electromagnetic relay 6KA is closed, and the fourth indicator buzzer 4HR alarms;

[0058] When the sixth time relay 6KT reaches the 6KT preset working time, the delayed normally open auxiliary contact of the sixth time relay 6KT closes, the coil of the seventh electromagnetic relay 7KA is energized, the normally open auxiliary contact of the seventh electromagnetic relay 7KA closes, and the fifth indicator light buzzer 5HR alarms.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] The present invention sets up an abnormal cut-off circuit so that the circuit can be cut off in time after the water pump works abnormally, thereby protecting the water pump and preventing the water pump from being damaged by abnormal heating caused by holding in air. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a circuit diagram of a water pump control device provided in Example 1.

[0062] Figure 2 A circuit diagram of a water pump control device provided in Example 2.

[0063] Figure 3 A circuit diagram of a water pump control device provided in Example 3.

[0064] Figure 4 A circuit diagram of a water pump control device provided in Example 4.

[0065] Figure 5 This is a circuit diagram of a water pump control device provided in Example 5. DETAILED DESCRIPTION

[0066] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0067] In order to better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0068] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0069] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0070] Example 1

[0071] like Figure 1 As shown, a water pump control device includes: a first water pump motor M1, a second water pump motor M2, a first contactor 1KM, a second contactor 2KM, a first button 1SB, a second button 2SB, a third button 3SB, a fourth button 4SB, a first time relay 1KT, a second time relay 2KT, a fifth time relay 5KT, a sixth time relay 6KT, a first knob multi-speed switch SAC1, a transformer, an upper limit switch, a lower limit switch, a first electromagnetic relay 1KA, a second electromagnetic relay 2KA, a seventh time relay 7KT, a protection switch, a fifth electromagnetic relay 5KA, and a third switch FQ;

[0072] The first water pump motor M1 is connected to the three-phase power supply through the main contacts of the first contactor 1KM, and the second water pump motor M2 is connected to the three-phase power supply through the main contacts of the second contactor 2KM;

[0073] One phase of the three-phase power supply is connected to the first input end of the first knob multi-speed switch SAC1 and the fourth input end of the first knob multi-speed switch SAC1;

[0074] One phase of the three-phase power supply is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the second end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the second end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the second input end of the first knob multi-speed switch SAC1 and the third input end of the first knob multi-speed switch SAC1;

[0075] One phase of the three-phase power supply is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the fourth end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the fourth end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fifth input end of the first knob multi-speed switch SAC1 and the sixth input end of the first knob multi-speed switch SAC1;

[0076] The first output end of the first knob multi-speed switch SAC1 is connected to one end of the first button 1SB, the other end of the first button 1SB is connected to one end of the second button 2SB and one end of the normally open auxiliary contact of the first contactor 1KM, the other end of the second button 2SB, the other end of the normally open auxiliary contact of the first contactor 1KM, the second output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the first time relay 1KT are connected to one end of the normally closed auxiliary contact of the second contactor 2KM, the other end of the normally closed auxiliary contact of the second contactor 2KM is connected to the fifth time relay 1KT. The first contactor 1KM coil is connected to the first time relay 5KT, and the other end of the first time relay 1KT coil is connected to the neutral line; the third output end of the first knob multi-speed switch SAC1 is connected to one end of the time delay normally open auxiliary contact of the first time relay 1KT and one end of the first time relay 1KT coil, and the other end of the first time relay 1KT coil is connected to the neutral line;

[0077] The fourth output end of the first knob multi-speed switch SAC1 is connected to one end of the third button 3SB, the other end of the third button 3SB is connected to one end of the fourth button 4SB and one end of the normally open auxiliary contact of the second contactor 2KM, the other end of the fourth button 4SB, the other end of the normally open auxiliary contact of the second contactor 2KM, the fifth output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the second time relay 2KT are connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the other end of the normally closed auxiliary contact of the first contactor 1KM is connected to the sixth output end of the first knob multi-speed switch SAC1, the other end of the normally closed auxiliary contact of the second time relay 2KT is connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the normally closed auxiliary contact of the first contactor 1KM. One end of the time relay 6KT time delay normally closed auxiliary contact is connected, the other end of the sixth time relay 6KT time delay normally closed auxiliary contact is connected to one end of the sixth time relay 6KT coil and one end of the second contactor 2KM coil, the other end of the sixth time relay 6KT coil and the other end of the second contactor 2KM coil are connected to the neutral line; the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the second time relay 2KT time delay normally open auxiliary contact and one end of the second time relay 2KT coil, and the other end of the second time relay 2KT coil is connected to the neutral line;

[0078] One phase of the three-phase power supply is connected to a first end of the transformer, and a second end of the transformer is connected to a neutral line;

[0079] The third end of the transformer is connected to one end of the third switch FQ and one end of the protection switch, the other end of the third switch FQ is connected to one end of the lower limit switch, one end of the upper limit switch, and the fifth end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the other end of the lower limit switch and the sixth end of the normally open auxiliary contact of the first electromagnetic relay 1KA are connected to one end of the normally closed auxiliary contact of the second electromagnetic relay 2KA, the other end of the normally closed auxiliary contact of the second electromagnetic relay 2KA is connected to one end of the delayed normally closed auxiliary contact of the seventh time relay 7KT, the other end of the delayed normally closed auxiliary contact of the seventh time relay 7KT is connected to one end of the coil of the seventh time relay 7KT and one end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the seventh time relay 7KT, the other end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the second electromagnetic relay 2KA, and the other end of the coil of the fifth electromagnetic relay 5KA are connected to the fourth end of the transformer; the other end of the upper limit switch is connected to one end of the coil of the second electromagnetic relay 2KA; the other end of the protection switch is connected to one end of the coil of the fifth electromagnetic relay 5KA.

[0080] It should be noted that the first gear of the first knob multi-gear switch SAC1 sets the first water pump motor M1 as the main water pump motor and the second water pump motor M2 as the standby water pump motor. The second gear of the first knob multi-gear switch SAC1 sets the second water pump motor M2 as the main water pump motor and the first water pump motor M1 as the standby water pump motor. The third gear of the first knob multi-gear switch SAC1 is the manual operation gear, allowing the user to control the first water pump motor M1 and the second water pump motor M2 according to their own needs by cooperating with the first button 1SB, the second button 2SB, the third button 3SB, and the fourth button 4SB.

[0081] A water pump control method, comprising:

[0082] S101: Select the first gear or the second gear of the first knob multi-gear switch SAC1. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, and the normally open auxiliary contact of the first electromagnetic relay 1KA is closed;

[0083] S102: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing;

[0084] S103: When the first gear of the first knob multi-speed switch SAC1 is selected, when the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally closed auxiliary contact of the fifth time relay 5KT is disconnected, and the first contactor 1KM coil is de-energized; the main contact of the first contactor 1KM is disconnected, and the first water pump motor M1 stops working; when the second gear of the first knob multi-speed switch SAC1 is selected, when the sixth time relay 6KT reaches the preset working time of 6KT, the delayed normally closed auxiliary contact of the sixth time relay 6KT is disconnected, the second contactor 2KM coil is de-energized, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working;

[0085] S104: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing;

[0086] S105: Repeat steps S102 to S104 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0087] It should be noted that the function of the normally closed auxiliary contact of the second contactor 2KM and the normally closed auxiliary contact of the first contactor 1KM is to prevent the first water pump motor M1 and the second water pump motor M2 from starting to work at the same time. During the switching process of step S103, the normally closed auxiliary contact of the second contactor 2KM and the normally closed auxiliary contact of the first contactor 1KM are closed or disconnected; but due to the short switching time, it will not affect the power on and off of the corresponding coil of the first contactor 1KM and the coil of the second contactor 2KM.

[0088] Further, in step S105, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working;

[0089] In step S105, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

[0090] It should be noted that the device determines whether there are faults in the first water pump motor M1 and the second water pump motor M2 by calculating the time of the fifth time relay 5KT, the sixth time relay 6KT, and the seventh time relay 7KT. If there is a fault, the device shuts down to protect the faulty water pump motor.

[0091] Example 2

[0092] Based on the water pump control device and method described in Example 1, this embodiment adopts the same water pump control device and method as Example 1. Figure 2 As shown, a water pump control device,

[0093] Furthermore, it also includes: a second knob multi-speed switch SAC2, a third time relay 3KT, and a fourth time relay 4KT;

[0094] One phase of the three-phase power supply is connected to the second input terminal of the second knob multi-speed switch SAC2, the eighth input terminal of the second knob multi-speed switch SAC2, and the thirteenth input terminal of the second knob multi-speed switch SAC2; the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fourth input terminal of the second knob multi-speed switch SAC2, the fifth input terminal of the second knob multi-speed switch SAC2, and the sixth input terminal of the second knob multi-speed switch SAC2, and the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the tenth input terminal of the second knob multi-speed switch SAC2, the eleventh input terminal of the second knob multi-speed switch SAC2, and the twelfth input terminal of the second knob multi-speed switch SAC2;

[0095] The second output end of the second knob multi-speed switch SAC2 is connected to the first input end of the first knob multi-speed switch SAC1, the fourth output end of the second knob multi-speed switch SAC2 is connected to the second input end of the first knob multi-speed switch SAC1, and the sixth output end of the second knob multi-speed switch SAC2 is connected to the third input end of the first knob multi-speed switch SAC1; the eighth output end of the second knob multi-speed switch SAC2 is connected to the fourth input end of the first knob multi-speed switch SAC1, the tenth output end of the second knob multi-speed switch SAC2 is connected to the fifth input end of the first knob multi-speed switch SAC1, and the twelfth output end of the second knob multi-speed switch SAC2 is connected to the sixth input end of the first knob multi-speed switch SAC1;

[0096] The fifth output end of the second knob multi-speed switch SAC2 is connected to the first end of the delayed normally closed auxiliary contact of the third time relay 3KT and the first end of the delayed normally open auxiliary contact of the third time relay 3KT, the second end of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to the second output end of the first knob multi-speed switch SAC1, and the second end of the delayed normally open auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the first time relay 1KT;

[0097] The eleventh output terminal of the second knob multi-speed switch SAC2 is connected to the third terminal of the delayed normally closed auxiliary contact of the third time relay 3KT and the third terminal of the delayed normally open auxiliary contact of the third time relay 3KT, the fourth terminal of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the second time relay 2KT, and the fourth terminal of the delayed normally open auxiliary contact of the third time relay 3KT is connected to the fifth output terminal of the first knob multi-speed switch SAC1;

[0098] The thirteenth output end of the second knob multi-speed switch SAC2 is connected to the fifth end of the third time relay 3KT delayed normally open auxiliary contact and one end of the third time relay 3KT coil, the sixth end of the third time relay 3KT delayed normally open auxiliary contact is connected to one end of the fourth time relay 4KT coil, the other end of the third time relay 3KT coil is connected to one end of the fourth time relay 4KT normally closed auxiliary contact, the other end of the fourth time relay 4KT normally closed auxiliary contact and the other end of the fourth time relay 4KT coil are connected to the neutral line.

[0099] It should be noted that the first gear of the second knob multi-gear switch SAC2 is the automatic water pump gear, and the time can be set according to the use requirements to rotate the first water pump motor M1 and the second water pump motor M2. The second gear of the second water pump motor M2 is to disable the automatic water pump gear, and the first water pump motor M1 and the second water pump motor M2 will not be automatically rotated. The user can adjust the first knob multi-gear switch SAC1 according to actual needs to achieve control of the first water pump motor M1 and the second water pump motor M2.

[0100] A water pump control method, comprising:

[0101] S201: Select the first gear of the second knob multi-gear switch SAC2. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is closed, and the third time relay 3KT starts timing;

[0102] S202: The coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, and the first water pump motor M1 starts to work;

[0103] S203: When the third time relay 3KT reaches the 3KT preset time, the delayed normally closed auxiliary contact of the third time relay 3KT is disconnected, and the delayed normally open auxiliary contact of the third time relay 3KT is closed; the first contactor 1KM coil loses power, the first contactor 1KM main contact is disconnected, and the first water pump motor M1 stops working; the second contactor 2KM coil is energized, the second contactor 2KM main contact is closed, and the second water pump motor M2 starts working; the fourth time relay 4KT starts timing;

[0104] S204: When the fourth time relay 4KT reaches the 4KT preset time, the normally closed auxiliary contact of the fourth time relay 4KT is closed, the third time relay 3KT starts timing, the delayed normally closed auxiliary contact of the third time relay 3KT is closed, and the delayed normally open auxiliary contact of the third time relay 3KT is disconnected; the second contactor 2KM coil loses power, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working; the first contactor 1KM coil is energized, the first contactor 1KM main contact is closed, and the first water pump motor M1 starts working;

[0105] S205: Repeat steps S203 to S204 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0106] It should be noted that steps S102 to S104 and steps S203 to S204 may be interspersed with each other, or may be two independent processes.

[0107] Further, in step S205, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working;

[0108] In step S205, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

[0109] It should be noted that the second knob multi-speed switch SAC2, the third time relay 3KT, the fourth time relay 4KT and other circuits in this embodiment jointly realize the rotation of the first water pump motor M1 and the second water pump motor M2, thereby increasing the life of the water pump motor.

[0110] Example 3

[0111] Based on the water pump control device and method described in Example 2, this embodiment adopts the same water pump control device and method as Example 2. Figure 3 As shown, a water pump control device further includes: a sixth electromagnetic relay 6KA, a seventh electromagnetic relay 7KA, a fourth indicator light buzzer 4HR, a fifth indicator light buzzer 5HR, and a reset switch 5SB;

[0112] One phase of the three-phase power supply is connected to one end of the reset switch 5SB, the other end of the reset switch 5SB is connected to one end of the delayed normally open auxiliary contact of the fifth time relay 5KT, one end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA, one end of the delayed normally open auxiliary contact of the sixth time relay 6KT, and one end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA, the other end of the delayed normally open auxiliary contact of the fifth time relay 5KT and the other end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA are connected to one end of the coil of the sixth electromagnetic relay 6KA and one end of the fourth indicator light buzzer 4HR, the other end of the coil of the sixth electromagnetic relay 6KA and the other end of the fourth indicator light buzzer 4HR are connected to the neutral line; the other end of the delayed normally open auxiliary contact of the sixth time relay 6KT and the other end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA are connected to one end of the coil of the seventh electromagnetic relay 7KA and one end of the fifth indicator light buzzer 5HR, the other end of the coil of the seventh electromagnetic relay 7KA and the other end of the fifth indicator light buzzer 5HR are connected to the neutral line.

[0113] Further, when the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally open auxiliary contact of the fifth time relay 5KT is closed, the coil of the sixth electromagnetic relay 6KA is energized, the normally open auxiliary contact of the sixth electromagnetic relay 6KA is closed, and the fourth indicator buzzer 4HR alarms;

[0114] When the sixth time relay 6KT reaches the 6KT preset working time, the delayed normally open auxiliary contact of the sixth time relay 6KT closes, the coil of the seventh electromagnetic relay 7KA is energized, the normally open auxiliary contact of the seventh electromagnetic relay 7KA closes, and the fifth indicator light buzzer 5HR alarms.

[0115] It should be noted that the indicator light buzzer alarms the real-time situation of the water pump motor, which is conducive to timely processing by the on-duty personnel, thereby increasing the life of the equipment.

[0116] Example 4

[0117] Based on the water pump control device and method described in Example 1, this embodiment adopts the same water pump control device and method as Example 1. Figure 4 As shown, a water pump control device, further comprising: a first indicator light 1HG, a second indicator light 2HG; a first thermal relay 1KH, a second thermal relay 2KH; a second indicator light buzzer 2HR, a third electromagnetic relay 3KA; a fourth electromagnetic relay 4KA, a third indicator light buzzer 3HR; a third indicator light 1HR; a first switch 1QF, a second switch 2QF;

[0118] One end of the first indicator light 1HG is connected to one end of the first contactor 1KM coil, and the other end of the first indicator light 1HG is connected to the other end of the first contactor 1KM coil;

[0119] One end of the second indicator light 2HG is connected to one end of the coil of the second contactor 2KM, and the other end of the second indicator light 2HG is connected to the other end of the coil of the second contactor 2KM.

[0120] One end of the main contact of the first thermal relay 1KH is connected to the first water pump motor M1, the other end of the main contact of the first thermal relay 1KH is connected to one end of the main contact of the first contactor 1KM, one end of the main contact of the second thermal relay 2KH is connected to the second water pump motor M2, and the other end of the main contact of the second thermal relay 2KH is connected to the second contactor 2KM;

[0121] The other end of the coil of the first contactor 1KM is connected to one end of the normally closed auxiliary contact of the first thermal relay 1KH, and the other end of the normally closed auxiliary contact of the first thermal relay 1KH is connected to the neutral line;

[0122] The other end of the coil of the second contactor 2KM is connected to one end of the normally closed auxiliary contact of the second thermal relay 2KH, and the other end of the normally closed auxiliary contact of the second thermal relay 2KH is connected to the neutral line.

[0123] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the first thermal relay 1KH, the other end of the normally open auxiliary contact of the first thermal relay 1KH is connected to one end of the coil of the third electromagnetic relay 3KA, and the other end of the coil of the third electromagnetic relay 3KA is connected to the neutral line;

[0124] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, the other end of the normally open auxiliary contact of the third electromagnetic relay 3KA is connected to one end of the second indicator light buzzer 2HR, and the other end of the second indicator light buzzer 2HR is connected to the neutral line.

[0125] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the second thermal relay 2KH, the other end of the normally open auxiliary contact of the second thermal relay 2KH is connected to one end of the coil of the fourth electromagnetic relay 4KA, and the other end of the coil of the fourth electromagnetic relay 4KA is connected to the neutral line;

[0126] One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA, the other end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA is connected to one end of the third indicator light buzzer 3HR, and the other end of the third indicator light buzzer 3HR is connected to the neutral line.

[0127] One phase of the three-phase power supply is connected to one end of the third indicator light 1HR, and the other end of the third indicator light 1HR is connected to the neutral line.

[0128] The three-phase power supply is connected to one end of the first switch 1QF, and the other end of the first switch 1QF is connected to the other end of the main contact of the first contactor 1KM;

[0129] The three-phase power supply is connected to one end of the second switch 2QF, and the other end of the second switch 2QF is connected to the other end of the main contact of the second contactor 2KM.

[0130] Example 5

[0131] Based on the water pump control device and method described in Example 3, this embodiment adopts the same water pump control device and method as Example 3. Figure 5 As shown, a water pump control device further includes: a first fuse 1FU, a second fuse 2FU, and a third fuse 3FU;

[0132] One phase of the three-phase power supply is connected to one end of the first fuse 1FU, and the other end of the first fuse 1FU is connected to one end of the reset switch 5SB, the first end of the transformer, one end of the third indicator light 1HR, one end of the normally open auxiliary contact of the first thermal relay 1KH, one end of the normally open auxiliary contact of the second thermal relay 2KH, one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, and one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA;

[0133] The other end of the main contact of the first contactor 1KM is connected to one end of the second fuse 2FU, and the other end of the second fuse 2FU is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA and the second input end of the second knob multi-speed switch SAC2;

[0134] One end of the third fuse 3FU is connected to the other end of the second contactor 2KM main contact, and the other end of the third fuse 3FU is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the eighth input end of the second knob multi-speed switch SAC2, and the thirteenth input end of the second knob multi-speed switch SAC2.

[0135] The same or similar reference numerals correspond to the same or similar components;

[0136] The terms used in the drawings to describe positional relationships are only used for illustrative purposes and should not be construed as limiting this patent;

[0137] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A water pump control device, characterized in that: include: The first water pump motor M1, the second water pump motor M2, the first contactor 1KM, the second contactor 2KM, the first button 1SB, the second button 2SB, the third button 3SB, the fourth button 4SB, the first time relay 1KT, the second time relay 2KT, the fifth time relay 5KT, the sixth time relay 6KT, the first knob multi-speed switch SAC1, the transformer, the upper limit switch, the lower limit switch, the first electromagnetic relay 1KA, the second electromagnetic relay 2KA, the seventh time relay 7KT, the protection switch, the fifth electromagnetic relay 5KA, the third switch FQ; The first water pump motor M1 is connected to the three-phase power supply through the main contacts of the first contactor 1KM, and the second water pump motor M2 is connected to the three-phase power supply through the main contacts of the second contactor 2KM; One phase of the three-phase power supply is connected to the first input end of the first knob multi-speed switch SAC1 and the fourth input end of the first knob multi-speed switch SAC1; One phase of the three-phase power supply is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the second end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the second end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the second input end of the first knob multi-speed switch SAC1 and the third input end of the first knob multi-speed switch SAC1; One phase of the three-phase power supply is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the fourth end of the normally open auxiliary contact of the first electromagnetic relay 1KA is connected to the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA, and the fourth end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fifth input end of the first knob multi-speed switch SAC1 and the sixth input end of the first knob multi-speed switch SAC1; The first output end of the first knob multi-speed switch SAC1 is connected to one end of the first button 1SB, the other end of the first button 1SB is connected to one end of the second button 2SB and one end of the normally open auxiliary contact of the first contactor 1KM, the other end of the second button 2SB, the other end of the normally open auxiliary contact of the first contactor 1KM, the second output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the first time relay 1KT are connected to one end of the normally closed auxiliary contact of the second contactor 2KM, the other end of the normally closed auxiliary contact of the second contactor 2KM is connected to the fifth time relay 1KT. The first contactor 1KM coil is connected to the first time relay 5KT, and the other end of the first time relay 1KT coil is connected to the neutral line; the third output end of the first knob multi-speed switch SAC1 is connected to one end of the time delay normally open auxiliary contact of the first time relay 1KT and one end of the first time relay 1KT coil, and the other end of the first time relay 1KT coil is connected to the neutral line; The fourth output end of the first knob multi-speed switch SAC1 is connected to one end of the third button 3SB, the other end of the third button 3SB is connected to one end of the fourth button 4SB and one end of the normally open auxiliary contact of the second contactor 2KM, the other end of the fourth button 4SB, the other end of the normally open auxiliary contact of the second contactor 2KM, the fifth output end of the first knob multi-speed switch SAC1, the other end of the delayed normally open auxiliary contact of the second time relay 2KT are connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the other end of the normally closed auxiliary contact of the first contactor 1KM is connected to the sixth output end of the first knob multi-speed switch SAC1, the other end of the normally closed auxiliary contact of the second time relay 2KT is connected to one end of the normally closed auxiliary contact of the first contactor 1KM, and the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the normally closed auxiliary contact of the first contactor 1KM. One end of the time relay 6KT time delay normally closed auxiliary contact is connected, the other end of the sixth time relay 6KT time delay normally closed auxiliary contact is connected to one end of the sixth time relay 6KT coil and one end of the second contactor 2KM coil, the other end of the sixth time relay 6KT coil and the other end of the second contactor 2KM coil are connected to the neutral line; the sixth output end of the first knob multi-speed switch SAC1 is connected to one end of the second time relay 2KT time delay normally open auxiliary contact and one end of the second time relay 2KT coil, and the other end of the second time relay 2KT coil is connected to the neutral line; One phase of the three-phase power supply is connected to a first end of the transformer, and a second end of the transformer is connected to a neutral line; The third end of the transformer is connected to one end of the third switch FQ and one end of the protection switch, the other end of the third switch FQ is connected to one end of the lower limit switch, one end of the upper limit switch, and the fifth end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the other end of the lower limit switch and the sixth end of the normally open auxiliary contact of the first electromagnetic relay 1KA are connected to one end of the normally closed auxiliary contact of the second electromagnetic relay 2KA, the other end of the normally closed auxiliary contact of the second electromagnetic relay 2KA is connected to one end of the delayed normally closed auxiliary contact of the seventh time relay 7KT, the other end of the delayed normally closed auxiliary contact of the seventh time relay 7KT is connected to one end of the coil of the seventh time relay 7KT and one end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the seventh time relay 7KT, the other end of the coil of the first electromagnetic relay 1KA, the other end of the coil of the second electromagnetic relay 2KA, and the other end of the coil of the fifth electromagnetic relay 5KA are connected to the fourth end of the transformer; the other end of the upper limit switch is connected to one end of the coil of the second electromagnetic relay 2KA; the other end of the protection switch is connected to one end of the coil of the fifth electromagnetic relay 5KA.

2. A water pump control device according to claim 1, characterized in that: Also includes: The second knob multi-speed switch SAC2, the third time relay 3KT, the fourth time relay 4KT; One phase of the three-phase power supply is connected to the second input terminal of the second knob multi-speed switch SAC2, the eighth input terminal of the second knob multi-speed switch SAC2, and the thirteenth input terminal of the second knob multi-speed switch SAC2; the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the fourth input terminal of the second knob multi-speed switch SAC2, the fifth input terminal of the second knob multi-speed switch SAC2, and the sixth input terminal of the second knob multi-speed switch SAC2, and the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected to the tenth input terminal of the second knob multi-speed switch SAC2, the eleventh input terminal of the second knob multi-speed switch SAC2, and the twelfth input terminal of the second knob multi-speed switch SAC2; The second output end of the second knob multi-speed switch SAC2 is connected to the first input end of the first knob multi-speed switch SAC1, the fourth output end of the second knob multi-speed switch SAC2 is connected to the second input end of the first knob multi-speed switch SAC1, and the sixth output end of the second knob multi-speed switch SAC2 is connected to the third input end of the first knob multi-speed switch SAC1; the eighth output end of the second knob multi-speed switch SAC2 is connected to the fourth input end of the first knob multi-speed switch SAC1, the tenth output end of the second knob multi-speed switch SAC2 is connected to the fifth input end of the first knob multi-speed switch SAC1, and the twelfth output end of the second knob multi-speed switch SAC2 is connected to the sixth input end of the first knob multi-speed switch SAC1; The fifth output end of the second knob multi-speed switch SAC2 is connected to the first end of the delayed normally closed auxiliary contact of the third time relay 3KT and the first end of the delayed normally open auxiliary contact of the third time relay 3KT, the second end of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to the second output end of the first knob multi-speed switch SAC1, and the second end of the delayed normally open auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the first time relay 1KT; The eleventh output terminal of the second knob multi-speed switch SAC2 is connected to the third terminal of the delayed normally closed auxiliary contact of the third time relay 3KT and the third terminal of the delayed normally open auxiliary contact of the third time relay 3KT, the fourth terminal of the delayed normally closed auxiliary contact of the third time relay 3KT is connected to one end of the delayed normally open auxiliary contact of the second time relay 2KT, and the fourth terminal of the delayed normally open auxiliary contact of the third time relay 3KT is connected to the fifth output terminal of the first knob multi-speed switch SAC1; The thirteenth output end of the second knob multi-speed switch SAC2 is connected to the fifth end of the third time relay 3KT delayed normally open auxiliary contact and one end of the third time relay 3KT coil, the sixth end of the third time relay 3KT delayed normally open auxiliary contact is connected to one end of the fourth time relay 4KT coil, the other end of the third time relay 3KT coil is connected to one end of the fourth time relay 4KT normally closed auxiliary contact, the other end of the fourth time relay 4KT normally closed auxiliary contact and the other end of the fourth time relay 4KT coil are connected to the neutral line.

3. A water pump control device according to claim 2, characterized in that: Also includes: The sixth electromagnetic relay 6KA, the seventh electromagnetic relay 7KA, the fourth indicator light buzzer 4HR, the fifth indicator light buzzer 5HR, and the reset switch 5SB; One phase of the three-phase power supply is connected to one end of the reset switch 5SB, the other end of the reset switch 5SB is connected to one end of the delayed normally open auxiliary contact of the fifth time relay 5KT, one end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA, one end of the delayed normally open auxiliary contact of the sixth time relay 6KT, and one end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA, the other end of the delayed normally open auxiliary contact of the fifth time relay 5KT and the other end of the normally open auxiliary contact of the sixth electromagnetic relay 6KA are connected to one end of the coil of the sixth electromagnetic relay 6KA and one end of the fourth indicator light buzzer 4HR, the other end of the coil of the sixth electromagnetic relay 6KA and the other end of the fourth indicator light buzzer 4HR are connected to the neutral line; the other end of the delayed normally open auxiliary contact of the sixth time relay 6KT and the other end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA are connected to one end of the coil of the seventh electromagnetic relay 7KA and one end of the fifth indicator light buzzer 5HR, the other end of the coil of the seventh electromagnetic relay 7KA and the other end of the fifth indicator light buzzer 5HR are connected to the neutral line.

4. A water pump control device according to any one of claims 1 to 3, characterized in that: Also includes: The first indicator light 1HG, the second indicator light 2HG; the first thermal relay 1KH, the second thermal relay 2KH; the second indicator light buzzer 2HR, the third electromagnetic relay 3KA; the fourth electromagnetic relay 4KA, the third indicator light buzzer 3HR; the third indicator light 1HR; the first switch 1QF, the second switch 2QF; One end of the first indicator light 1HG is connected to one end of the first contactor 1KM coil, and the other end of the first indicator light 1HG is connected to the other end of the first contactor 1KM coil; One end of the second indicator light 2HG is connected to one end of the coil of the second contactor 2KM, and the other end of the second indicator light 2HG is connected to the other end of the coil of the second contactor 2KM. One end of the main contact of the first thermal relay 1KH is connected to the first water pump motor M1, the other end of the main contact of the first thermal relay 1KH is connected to one end of the main contact of the first contactor 1KM, one end of the main contact of the second thermal relay 2KH is connected to the second water pump motor M2, and the other end of the main contact of the second thermal relay 2KH is connected to the second contactor 2KM; The other end of the coil of the first contactor 1KM is connected to one end of the normally closed auxiliary contact of the first thermal relay 1KH, and the other end of the normally closed auxiliary contact of the first thermal relay 1KH is connected to the neutral line; The other end of the coil of the second contactor 2KM is connected to one end of the normally closed auxiliary contact of the second thermal relay 2KH, and the other end of the normally closed auxiliary contact of the second thermal relay 2KH is connected to the neutral line. One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the first thermal relay 1KH, the other end of the normally open auxiliary contact of the first thermal relay 1KH is connected to one end of the coil of the third electromagnetic relay 3KA, and the other end of the coil of the third electromagnetic relay 3KA is connected to the neutral line; One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, the other end of the normally open auxiliary contact of the third electromagnetic relay 3KA is connected to one end of the second indicator light buzzer 2HR, and the other end of the second indicator light buzzer 2HR is connected to the neutral line. One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the second thermal relay 2KH, the other end of the normally open auxiliary contact of the second thermal relay 2KH is connected to one end of the coil of the fourth electromagnetic relay 4KA, and the other end of the coil of the fourth electromagnetic relay 4KA is connected to the neutral line; One phase of the three-phase power supply is connected to one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA, the other end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA is connected to one end of the third indicator light buzzer 3HR, and the other end of the third indicator light buzzer 3HR is connected to the neutral line. One phase of the three-phase power supply is connected to one end of the third indicator light 1HR, and the other end of the third indicator light 1HR is connected to the neutral line. The three-phase power supply is connected to one end of the first switch 1QF, and the other end of the first switch 1QF is connected to the other end of the main contact of the first contactor 1KM; The three-phase power supply is connected to one end of the second switch 2QF, and the other end of the second switch 2QF is connected to the other end of the main contact of the second contactor 2KM.

5. A water pump control device according to claim 3, characterized in that: Also includes: The first fuse 1FU, the second fuse 2FU, and the third fuse 3FU; One phase of the three-phase power supply is connected to one end of the first fuse 1FU, and the other end of the first fuse 1FU is connected to one end of the reset switch 5SB, the first end of the transformer, one end of the third indicator light 1HR, one end of the normally open auxiliary contact of the first thermal relay 1KH, one end of the normally open auxiliary contact of the second thermal relay 2KH, one end of the normally open auxiliary contact of the third electromagnetic relay 3KA, and one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA; The other end of the main contact of the first contactor 1KM is connected to one end of the second fuse 2FU, and the other end of the second fuse 2FU is connected to the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA and the second input end of the second knob multi-speed switch SAC2; One end of the third fuse 3FU is connected to the other end of the second contactor 2KM main contact, and the other end of the third fuse 3FU is connected to the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the eighth input end of the second knob multi-speed switch SAC2, and the thirteenth input end of the second knob multi-speed switch SAC2.

6. A water pump control method, applied to the control device according to claim 1, characterized in that: include: S101: Select the first gear or the second gear of the first knob multi-gear switch SAC1. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, and the normally open auxiliary contact of the first electromagnetic relay 1KA is closed; S102: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing; S103: When the first gear of the first knob multi-speed switch SAC1 is selected, when the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally closed auxiliary contact of the fifth time relay 5KT is disconnected, and the first contactor 1KM coil is de-energized; the main contact of the first contactor 1KM is disconnected, and the first water pump motor M1 stops working; when the second gear of the first knob multi-speed switch SAC1 is selected, when the sixth time relay 6KT reaches the preset working time of 6KT, the delayed normally closed auxiliary contact of the sixth time relay 6KT is disconnected, the second contactor 2KM coil is de-energized, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working; S104: When the first gear of the first knob multi-gear switch SAC1 is selected, the coil of the second contactor 2KM is energized, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts to work, and the sixth time relay 6KT starts timing; when the second gear of the first knob multi-gear switch SAC1 is selected, the coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts to work, and the fifth time relay 5KT starts timing; S105: Repeat steps S102 to S104 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

7. A water pump control method according to claim 6, characterized in that: In step S105, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working; In step S105, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

8. A water pump control method, applied to the control device according to claim 2, characterized in that: include: S201: Select the first gear of the second knob multi-gear switch SAC2. When the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, the coil of the first electromagnetic relay 1KA is energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is closed, and the third time relay 3KT starts timing; S202: The coil of the first contactor 1KM is energized, the main contact of the first contactor 1KM is closed, and the first water pump motor M1 starts to work; S203: When the third time relay 3KT reaches the 3KT preset time, the delayed normally closed auxiliary contact of the third time relay 3KT is disconnected, and the delayed normally open auxiliary contact of the third time relay 3KT is closed; the first contactor 1KM coil loses power, the first contactor 1KM main contact is disconnected, and the first water pump motor M1 stops working; the second contactor 2KM coil is energized, the second contactor 2KM main contact is closed, and the second water pump motor M2 starts working; the fourth time relay 4KT starts timing; S204: When the fourth time relay 4KT reaches the 4KT preset time, the normally closed auxiliary contact of the fourth time relay 4KT is closed, the third time relay 3KT starts timing, the delayed normally closed auxiliary contact of the third time relay 3KT is closed, and the delayed normally open auxiliary contact of the third time relay 3KT is disconnected; the second contactor 2KM coil loses power, the second contactor 2KM main contact is disconnected, and the second water pump motor M2 stops working; the first contactor 1KM coil is energized, the first contactor 1KM main contact is closed, and the first water pump motor M1 starts working; S205: Repeat steps S203 to S204 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, and the first water pump motor M1 stops working or the second water pump motor M2 stops working.

9. A water pump control method according to claim 8, characterized in that: In step S205, when the seventh time relay 7KT reaches the 7KT preset time, the delayed normally closed auxiliary contact of the seventh time relay 7KT is disconnected, the coil of the first electromagnetic relay 1KA loses power, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM loses power, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working; In step S205, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the coil of the second electromagnetic relay 2KA is energized, the normally closed auxiliary contact of the second electromagnetic relay 2KA is disconnected, the coil of the first electromagnetic relay 1KA is de-energized, the normally open auxiliary contact of the first electromagnetic relay 1KA is disconnected, the coil of the first contactor 1KM or the coil of the second contactor 2KM is de-energized, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is disconnected, and the first water pump motor M1 or the second water pump motor M2 stops working.

10. A water pump control method according to any one of claims 6 to 9, applied to a control device according to any one of claims 3 to 5, characterized in that: When the fifth time relay 5KT reaches the preset working time of 5KT, the delayed normally open auxiliary contact of the fifth time relay 5KT is closed, the coil of the sixth electromagnetic relay 6KA is energized, the normally open auxiliary contact of the sixth electromagnetic relay 6KA is closed, and the fourth indicator buzzer 4HR alarms; When the sixth time relay 6KT reaches the 6KT preset working time, the delayed normally open auxiliary contact of the sixth time relay 6KT closes, the coil of the seventh electromagnetic relay 7KA is energized, the normally open auxiliary contact of the seventh electromagnetic relay 7KA closes, and the fifth indicator light buzzer 5HR alarms.

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