Water pump control device

Abstract

The utility model discloses a water pump control device. The device comprises an abnormal cut-off circuit and a water pump control circuit. The abnormity cut-off circuit comprises 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. The water pump control circuit comprises 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 and a first knob multi-gear switch SAC1. 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 utility model relates to mechanical automatic control field, more specifically, relate to a water pump control device. BACKGROUND

[0002] Now, water pump is widely used in daily production and life in each aspect. In the process of using water pump, often need to control and deploy for water pump, therefore, water pump often matches and uses water pump control circuit to control and deploy water pump.

[0003] Traditional water pump is widely used, and is used for a long time, so water pump damage condition often appears. Especially when the pump body works, the water pump motor works, but the water pump cannot carry out the pressing work, leading to the long time water pressure no change gas phenomenon. The gas phenomenon makes the corresponding part of the water pump heat, further aggravates the water pump gas phenomenon, and further damages the water pump motor. If the water pump is damaged, it will lead to abnormal work, and can also lead to unstable water supply pressure, so that daily production and life cannot be carried out.

[0004] The prior art discloses a kind of control circuit for realizing water pump automatic rotation, including power module, communication module, input module, control module and central processing module. The circuit does not consider water pump gas phenomenon, and also does not consider the problem that water pump gas phenomenon appears and is difficult to automatically rotate water pump. UTILITY MODEL CONTENT

[0005] The utility model aims at the defect that water pump cannot overcome gas phenomenon in prior art, and water pump cannot be coped with after being damaged. A water pump control device is provided.

[0006] The primary purpose of the utility model is to solve the above technical problems, and the technical scheme of the utility model is as follows:

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

[0008] First water pump motor M1 is connected with three-phase power supply by the main contact of first contactor 1KM, and second water pump motor M2 is connected with three-phase power supply by the main contact of second contactor 2KM;

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

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

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

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

[0013] The fourth output end of the first rotary knob multi-gear switch SAC1 is connected with one end of the third button 3SB, the other end of the third button 3SB is connected with 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 rotary knob multi-gear switch SAC1, the other end of the time delay normally open auxiliary contact of the second time relay 2KT are connected with one end of the normally closed auxiliary contact of the first contactor 1KM, the other end of the normally closed auxiliary contact of the first contactor 1KM is connected with one end of the time delay normally closed auxiliary contact of the sixth time relay 6KT, the other end of the time delay normally closed auxiliary contact of the sixth time relay 6KT is connected with one end of the coil of the sixth time relay 6KT and one end of the coil of the second contactor 2KM, the other end of the coil of the sixth time relay 6KT and the other end of the coil of the second contactor 2KM are connected with the zero line; the sixth output end of the first rotary knob multi-gear switch SAC1 is connected with one end of the time delay normally open auxiliary contact of the second time relay 2KT and one end of the coil of the second time relay 2KT, the other end of the coil of the second time relay 2KT is connected with the zero line;

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

[0015] The third end of the transformer is connected with one end of the third switch FQ and one end of the protection switch, the other end of the third switch FQ is connected with 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 with 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 with one end of the time delay normally closed auxiliary contact of the seventh time relay 7KT, the other end of the time delay normally closed auxiliary contact of the seventh time relay 7KT is connected with 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 with the fourth end of the transformer; the other end of the upper limit switch is connected with one end of the coil of the second electromagnetic relay 2KA; the other end of the protection switch is connected with one end of the coil of the fifth electromagnetic relay 5KA.

[0016] Further, it further comprises: a second rotary knob multi-gear switch SAC2, a third time relay 3KT and a fourth time relay 4KT;

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

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

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

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

[0021] The thirteenth output end of the second rotary knob multi-gear switch SAC2 is connected with the fifth end of the delay normally open auxiliary contact of the third time relay 3KT and the first end of the coil of the third time relay 3KT, the sixth end of the delay normally open auxiliary contact of the third time relay 3KT is connected with the first end of the coil of the fourth time relay 4KT, the other end of the coil of the third time relay 3KT is connected with the first end of the normally closed auxiliary contact of the fourth time relay 4KT, the other end of the normally closed auxiliary contact of the fourth time relay 4KT and the other end of the coil of the fourth time relay 4KT are connected with the zero line.

[0022] Further, it further comprises a sixth electromagnetic relay 6KA, a seventh electromagnetic relay 7KA, a fourth indicator lamp buzzer 4HR, a fifth indicator lamp buzzer 5HR, a reset switch 5SB.

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

[0024] Further, it further comprises a first indicator lamp 1HG and a second indicator lamp 2HG.

[0025] The first end of the first indicator lamp 1HG is connected with the first end of the coil of the first contactor 1KM, and the other end of the first indicator lamp 1HG is connected with the other end of the coil of the first contactor 1KM.

[0026] The first end of the second indicator lamp 2HG is connected with the first end of the coil of the second contactor 2KM, and the other end of the second indicator lamp 2HG is connected with the other end of the coil of the second contactor 2KM.

[0027] Further, it further comprises a first thermal relay 1KH and a second thermal relay 2KH.

[0028] One end of the main contact of the first thermal relay 1KH is connected with the first water pump motor M1, the other end of the main contact of the first thermal relay 1KH is connected with 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 with the second water pump motor M2, the other end of the main contact of the second thermal relay 2KH is connected with the second contactor 2KM;

[0029] The other end of the coil of the first contactor 1KM is connected with one end of the normally closed auxiliary contact of the first thermal relay 1KH, the other end of the normally closed auxiliary contact of the first thermal relay 1KH is connected with the zero line;

[0030] The other end of the coil of the second contactor 2KM is connected with one end of the normally closed auxiliary contact of the second thermal relay 2KH, the other end of the normally closed auxiliary contact of the second thermal relay 2KH is connected with the zero line.

[0031] Further, it further comprises: the second indicating lamp buzzer 2HR, the third electromagnetic relay 3KA;

[0032] One phase of the three-phase power supply is connected with 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 with one end of the coil of the third electromagnetic relay 3KA, the other end of the coil of the third electromagnetic relay 3KA is connected with the zero line;

[0033] One phase of the three-phase power supply is connected with 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 with one end of the second indicating lamp buzzer 2HR, the other end of the second indicating lamp buzzer 2HR is connected with the zero line.

[0034] Further, it further comprises: the fourth electromagnetic relay 4KA, the third indicating lamp buzzer 3HR;

[0035] One phase of the three-phase power supply is connected with 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 with one end of the coil of the fourth electromagnetic relay 4KA, the other end of the coil of the fourth electromagnetic relay 4KA is connected with the zero line;

[0036] One phase of the three-phase power supply is connected with 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 with one end of the third indicating lamp buzzer 3HR, the other end of the third indicating lamp buzzer 3HR is connected with the zero line.

[0037] Further, it further comprises: the third indicating lamp 1HR;

[0038] One phase of the three-phase power supply is connected with one end of the third indicating lamp 1HR, the other end of the third indicating lamp 1HR is connected with the zero line.

[0039] Further, it further comprises: a first switch 1QF, a second switch 2QF;

[0040] The three-phase power supply is connected with one end of the first switch 1QF, and the other end of the first switch 1QF is connected with the other end of the main contact of the first contactor 1KM;

[0041] The three-phase power supply is connected with one end of the second switch 2QF, and the other end of the second switch 2QF is connected with the other end of the main contact of the second contactor 2KM.

[0042] Further, it further comprises: a first fuse 1FU, a second fuse 2FU, a third fuse 3FU;

[0043] One phase of the three-phase power supply is connected with one end of the first fuse 1FU, and the other end of the first fuse 1FU is connected with one end of the reset switch 5SB, the first end of the transformer, one end of the third indicator lamp 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;

[0044] The other end of the main contact of the first contactor 1KM is connected with one end of the second fuse 2FU, and the other end of the second fuse 2FU is connected with 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-gear switch SAC2;

[0045] One end of the third fuse 3FU is connected with the other end of the main contact of the second contactor 2KM, and the other end of the third fuse 3FU is connected with the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the eighth input end of the second knob multi-gear switch SAC2 and the thirteenth input end of the second knob multi-gear switch SAC2.

[0046] Compared with the prior art, the utility model has the advantages that:

[0047] The utility model discloses a water pump control device, which comprises a three-phase power supply, a first switch 1QF, a second switch 2QF, a first contactor 1KM, a second contactor 2KM, a first fuse 1FU, a second fuse 2FU, a third fuse 3FU, a reset switch 5SB, a transformer, a first indicator lamp 1HR, a first thermal relay 1KH, a second thermal relay 2KH, a third electromagnetic relay 3KA, a fourth electromagnetic relay 4KA, a first electromagnetic relay 1KA, a second knob multi-gear switch SAC2 and a third indicator lamp 2HR. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 A structure diagram of a water pump control device for example 1 is provided.

[0049] Figure 2 A structure diagram of a water pump control device for example 2 is provided.

[0050] Figure 3 A structure diagram of a water pump control device for example 3 is provided.

[0051] Figure 4 A structure diagram of a water pump control device provided for Example 4.

[0052] Figure 5 A structure diagram of a water pump control device provided for Example 5.

[0053] Figure 6 A structure diagram of a water pump control device provided for Example 6.

[0054] Figure 7 A structure diagram of a water pump control device provided for Example 7.

[0055] Figure 8 A structure diagram of a water pump control device provided for Example 8.

[0056] Figure 9 A structure diagram of a water pump control device provided for Example 9.

[0057] Figure 10 A structure diagram of a water pump control device provided for Example 10. DETAILED DESCRIPTION

[0058] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the description serve to explain the principles of the present application.

[0059] To better illustrate the present embodiments, some components in the drawings can be omitted, enlarged or reduced, and do not represent the actual size of the product.

[0060] It is understandable for those skilled in the art that some well-known structures and their descriptions in the drawings can be omitted.

[0061] The technical solutions of the present application will be further described below in combination with the drawings and embodiments.

[0062] Example 1

[0063] As shown in Figure 1 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-gear 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, a third switch FQ.

[0064] The first water pump motor M1 is connected with the three-phase power supply through the main contact of the first contactor 1KM, and the second water pump motor M2 is connected with the three-phase power supply through the main contact of the second contactor 2KM;

[0065] One phase of the three-phase power supply is connected with the first input end of the first knob multi-gear switch SAC1 and the fourth input end of the first knob multi-gear switch SAC1;

[0066] One phase of the three-phase power supply is connected with 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 with 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 with the second input end of the first knob multi-gear switch SAC1 and the third input end of the first knob multi-gear switch SAC1;

[0067] One phase of the three-phase power supply is connected with 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 with 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 with the fifth input end of the first knob multi-gear switch SAC1 and the sixth input end of the first knob multi-gear switch SAC1;

[0068] One end of the first button 1SB is connected with the first output end of the first knob multi-gear switch SAC1, the other end of the first button 1SB is connected with 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-gear switch SAC1 and the other end of the delay normally open auxiliary contact of the first time relay 1KT are connected with 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 with one end of the delay normally closed auxiliary contact of the fifth time relay 5KT, the other end of the delay normally closed auxiliary contact of the fifth time relay 5KT is connected with one end of the coil of the fifth time relay 5KT and one end of the coil of the first contactor 1KM, the other end of the coil of the fifth time relay 5KT and the other end of the coil of the first contactor 1KM are connected with the zero line; one end of the delay normally open auxiliary contact of the first time relay 1KT and one end of the coil of the first time relay 1KT are connected with the third output end of the first knob multi-gear switch SAC1, and the other end of the coil of the first time relay 1KT is connected with the zero line;

[0069] The fourth output end of the first rotary knob multi-position switch SAC1 is connected with one end of the third button 3SB, the other end of the third button 3SB is connected with 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 rotary knob multi-position switch SAC1, the other end of the time delay normally open auxiliary contact of the second time relay 2KT and one end of the normally closed auxiliary contact of the first contactor 1KM are connected, the other end of the normally closed auxiliary contact of the first contactor 1KM is connected with one end of the time delay normally closed auxiliary contact of the sixth time relay 6KT, the other end of the time delay normally closed auxiliary contact of the sixth time relay 6KT is connected with one end of the coil of the sixth time relay 6KT and one end of the coil of the second contactor 2KM, the other end of the coil of the sixth time relay 6KT and the other end of the coil of the second contactor 2KM are connected with the zero line; the sixth output end of the first rotary knob multi-position switch SAC1 is connected with one end of the time delay normally open auxiliary contact of the second time relay 2KT and one end of the coil of the second time relay 2KT, the other end of the coil of the second time relay 2KT is connected with the zero line;

[0070] One phase of the three-phase power supply is connected with the first end of the transformer, and the second end of the transformer is connected with the zero line;

[0071] The third end of the transformer is connected with one end of the third switch FQ and one end of the protection switch, the other end of the third switch FQ is connected with 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 with 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 with one end of the time delay normally closed auxiliary contact of the seventh time relay 7KT, the other end of the time delay normally closed auxiliary contact of the seventh time relay 7KT is connected with 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 with the fourth end of the transformer; the other end of the upper limit switch is connected with one end of the coil of the second electromagnetic relay 2KA; the other end of the protection switch is connected with one end of the coil of the fifth electromagnetic relay 5KA.

[0072] It should be noted that the first position of the first rotary knob multi-position 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 position of the first rotary knob multi-position 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 position of the first rotary knob multi-position switch SAC1 is a 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 in cooperation with the first button 1SB, the second button 2SB, the third button 3SB, and the fourth button 4SB.

[0073] A water pump control method, comprising:

[0074] S101: Select the first position or the second position of the first rotary knob multi-position 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, and the coil of the first electromagnetic relay 1KA is powered on. The normally open auxiliary contact of the first electromagnetic relay 1KA is closed.

[0075] S102: When the first position of the first rotary knob multi-position switch SAC1 is selected, the coil of the first contactor 1KM is powered on, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts working, and the fifth time relay 5KT starts timing. When the second position of the first rotary knob multi-position switch SAC1 is selected, the coil of the second contactor 2KM is powered on, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts working, and the sixth time relay 6KT starts timing.

[0076] S103: When the first position of the first rotary knob multi-position switch SAC1 is selected, when the fifth time relay 5KT reaches the 5KT preset working time, the delay normally closed auxiliary contact of the fifth time relay 5KT is opened, the coil of the first contactor 1KM is powered off. The main contact of the first contactor 1KM is opened, and the first water pump motor M1 stops working. When the second position of the first rotary knob multi-position switch SAC1 is selected, when the sixth time relay 6KT reaches the 6KT preset working time, the delay normally closed auxiliary contact of the sixth time relay 6KT is opened, the coil of the second contactor 2KM is powered off, the main contact of the second contactor 2KM is opened, and the second water pump motor M2 stops working.

[0077] S104: When the first position of the first rotary knob multi-position switch SAC1 is selected, the coil of the second contactor 2KM is powered on, the main contact of the second contactor 2KM is closed, the second water pump motor M2 starts working, and the sixth time relay 6KT starts timing. When the second position of the first rotary knob multi-position switch SAC1 is selected, the coil of the first contactor 1KM is powered on, the main contact of the first contactor 1KM is closed, the first water pump motor M1 starts working, and the fifth time relay 5KT starts timing.

[0078] S105: repeating steps S102-S104 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0079] It should be noted that the role of the second contactor 2KM normally closed auxiliary contact and the first contactor 1KM normally closed auxiliary contact 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 in step S103, the second contactor 2KM normally closed auxiliary contact and the first contactor 1KM normally closed auxiliary contact exist closing or opening phenomenon; but because the switching time is short, it will not affect the power-on and power-off of the corresponding first contactor 1KM coil and second contactor 2KM coil.

[0080] Further, in step S105, when the seventh time relay 7KT reaches the 7KT preset time, the delay normally closed auxiliary contact of the seventh time relay 7KT is opened, the coil of the first electromagnetic relay 1KA is powered off, the normally open auxiliary contact of the first electromagnetic relay 1KA is opened, the coil of the first contactor 1KM or the coil of the second contactor 2KM is powered off, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is opened, and the first water pump motor M1 or the second water pump motor M2 stops working;

[0081] 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 powered on, the normally closed auxiliary contact of the second electromagnetic relay 2KA is opened, the coil of the first electromagnetic relay 1KA is powered off, the normally open auxiliary contact of the first electromagnetic relay 1KA is opened, the coil of the first contactor 1KM or the coil of the second contactor 2KM is powered off, the main contact of the first contactor 1KM or the main contact of the second contactor 2KM is opened, and the first water pump motor M1 or the second water pump motor M2 stops working.

[0082] It should be noted that the device determines whether the first water pump motor M1 and the second water pump motor M2 have a fault by the time calculation mode of the fifth time relay 5KT, the sixth time relay 6KT, and the seventh time relay 7KT, and if there is a fault, the pump motor with the fault is protected by stopping.

[0083] Embodiment 2

[0084] Based on the water pump control device and method described in embodiment 1, this embodiment adopts the same water pump control device and method as embodiment 1. As shown in Figure 2 It also includes a second knob multi-gear switch SAC2, a third time relay 3KT, and a fourth time relay 4KT.

[0085] One phase of three-phase power supply is connected with the second input end of the second rotary multi-position switch SAC2, the eighth input end of the second rotary multi-position switch SAC2, and the thirteenth input end of the second rotary multi-position switch SAC2; the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected with the fourth input end of the second rotary multi-position switch SAC2, the fifth input end of the second rotary multi-position switch SAC2, and the sixth input end of the second rotary multi-position switch SAC2, and the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected with the tenth input end of the second rotary multi-position switch SAC2, the eleventh input end of the second rotary multi-position switch SAC2, and the twelfth input end of the second rotary multi-position switch SAC2;

[0086] The second output end of the second rotary multi-position switch SAC2 is connected with the first input end of the first rotary multi-position switch SAC1, the fourth output end of the second rotary multi-position switch SAC2 is connected with the second input end of the first rotary multi-position switch SAC1, and the sixth output end of the second rotary multi-position switch SAC2 is connected with the third input end of the first rotary multi-position switch SAC1; the eighth output end of the second rotary multi-position switch SAC2 is connected with the fourth input end of the first rotary multi-position switch SAC1, the tenth output end of the second rotary multi-position switch SAC2 is connected with the fifth input end of the first rotary multi-position switch SAC1, and the twelfth output end of the second rotary multi-position switch SAC2 is connected with the sixth input end of the first rotary multi-position switch SAC1;

[0087] The fifth output end of the second rotary multi-position switch SAC2 is connected with the first end of the time-delay normally closed auxiliary contact of the third time relay 3KT and the first end of the time-delay normally open auxiliary contact of the third time relay 3KT, the second end of the time-delay normally closed auxiliary contact of the third time relay 3KT is connected with the second output end of the first rotary multi-position switch SAC1, and the second end of the time-delay normally open auxiliary contact of the third time relay 3KT is connected with the time-delay normally open auxiliary contact of the first time relay 1KT;

[0088] The eleventh output end of the second rotary multi-position switch SAC2 is connected with the third end of the time-delay normally closed auxiliary contact of the third time relay 3KT and the third end of the time-delay normally open auxiliary contact of the third time relay 3KT, the fourth end of the time-delay normally closed auxiliary contact of the third time relay 3KT is connected with the time-delay normally open auxiliary contact of the second time relay 2KT, and the fourth end of the time-delay normally open auxiliary contact of the third time relay 3KT is connected with the fifth output end of the first rotary multi-position switch SAC1;

[0089] The thirteenth output end of the second rotary knob multi-gear switch SAC2 is connected with the fifth terminal of the delay normally open auxiliary contact of the third time relay 3KT and the first terminal of the coil of the third time relay 3KT, the sixth terminal of the delay normally open auxiliary contact of the third time relay 3KT is connected with the first terminal of the coil of the fourth time relay 4KT, the other terminal of the coil of the third time relay 3KT is connected with the first terminal of the normally closed auxiliary contact of the fourth time relay 4KT, the other terminal of the normally closed auxiliary contact of the fourth time relay 4KT and the other terminal of the coil of the fourth time relay 4KT are connected with the zero line.

[0090] It should be noted that the first gear of the second rotary knob multi-gear switch SAC2 is the automatic switching water pump gear, and the time can be set according to the use demand 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 the automatic switching water pump gear, and the first water pump motor M1 and the second water pump motor M2 are not automatically rotated. The user can adjust the first rotary knob multi-gear switch SAC1 according to the actual need to achieve the control of the first water pump motor M1 and the second water pump motor M2.

[0091] A water pump control method, comprising:

[0092] S201: The first gear of the second rotary knob multi-gear switch SAC2 is selected, when the water pressure reaches the first preset pressure value, the lower limit switch is closed, the seventh time relay 7KT starts timing, and the coil of the first electromagnetic relay 1KA is powered on; The normally open auxiliary contact of the first electromagnetic relay 1KA is closed; and the third time relay 3KT starts timing.

[0093] S202: The coil of the first contactor 1KM is powered on, the main contact of the first contactor 1KM is closed, and the first water pump motor M1 starts working;

[0094] S203: When the third time relay 3KT reaches the 3KT preset time, the delay normally closed auxiliary contact of the third time relay 3KT is disconnected, and the delay normally open auxiliary contact of the third time relay 3KT is closed; The coil of the first contactor 1KM is powered off, the main contact of the first contactor 1KM is disconnected, and the first water pump motor M1 stops working; The coil of the second contactor 2KM is powered on, the main contact of the second contactor 2KM is closed, and the second water pump motor M2 starts working; and the fourth time relay 4KT starts timing.

[0095] S204: When the fourth time relay 4KT reaches the 4KT preset time, the fourth time relay 4KT normally closed auxiliary contact is closed, the third time relay 3KT starts timing, the third time relay 3KT delay normally closed auxiliary contact is closed, the third time relay 3KT delay normally open auxiliary contact is opened; the second contactor 2KM coil loses power, the second contactor 2KM main contact is opened, the second water pump motor M2 stops working; the first contactor 1KM coil gets power, the first contactor 1KM main contact is closed, the first water pump motor M1 starts working;

[0096] S205: Repeat steps S203-S204 until the seventh time relay 7KT reaches the 7KT preset time or the water pressure reaches the second preset pressure value, the first water pump motor M1 stops working or the second water pump motor M2 stops working.

[0097] It should be noted that steps S102-S104 and steps S203-S204 can be interleaved with each other or can be two independent processes.

[0098] Further, in step S205, when the seventh time relay 7KT reaches the 7KT preset time, the seventh time relay 7KT delay normally closed auxiliary contact is opened, the first electromagnetic relay 1KA coil loses power, the first electromagnetic relay 1KA normally open auxiliary contact is opened, the first contactor 1KM coil or the second contactor 2KM coil loses power, the first contactor 1KM main contact or the second contactor 2KM main contact is opened, the first water pump motor M1 or the second water pump motor M2 stops working;

[0099] In step S205, when the water pressure reaches the second preset pressure value, the upper limit switch is closed, the second electromagnetic relay 2KA coil gets power, the second electromagnetic relay 2KA normally closed auxiliary contact is opened, the first electromagnetic relay 1KA coil loses power, the first electromagnetic relay 1KA normally open auxiliary contact is opened, the first contactor 1KM coil or the second contactor 2KM coil loses power, the first contactor 1KM main contact or the second contactor 2KM main contact is opened, the first water pump motor M1 or the second water pump motor M2 stops working.

[0100] It should be noted that the second rotary knob multi-gear switch SAC2, the third time relay 3KT, the fourth time relay 4KT and other circuits in this embodiment together realize the rotation of the first water pump motor M1 and the second water pump motor M2, thereby increasing the service life of the water pump motor.

[0101] Embodiment 3

[0102] Based on the water pump control device and method described in embodiment 2, this embodiment adopts the same water pump control device and method as embodiment 2. As shown in FIG. 3, the water pump control device of this embodiment comprises a first water pump motor M1, a second water pump motor M2, a first contactor 1KM, a second contactor 2KM, a third time relay 3KT, a fourth time relay 4KT, a fifth time relay 5KT, a sixth time relay 6KT, a seventh time relay 7KT, a first electromagnetic relay 1KA, a second electromagnetic relay 2KA, a first pressure sensor 1PS, a second pressure sensor 2PS, a first rotary knob multi-gear switch SAC1, a second rotary knob multi-gear switch SAC2, a third rotary knob multi-gear switch SAC3, a fourth rotary knob multi-gear switch SAC4, a fifth rotary knob multi-gear switch SAC5, a sixth rotary knob multi-gear switch SAC6, a seventh rotary knob multi-gear switch SAC7, a first upper limit switch ULS1, a second upper limit switch ULS2, a third upper limit switch ULS3, a fourth upper limit switch ULS4, a fifth upper limit switch ULS5, a sixth upper limit switch ULS6, a seventh upper limit switch ULS7, a first lower limit switch LLS1, a second lower limit switch LLS2, a third lower limit switch LLS3, a fourth lower limit switch LLS4, a fifth lower limit switch LLS5, a sixth lower limit switch LLS6, a seventh lower limit switch LLS7, a first water pump motor M1, a second water pump motor M2, a first contactor 1KM, a second contactor 2KM, a third time relay 3KT, a fourth time relay 4KT, a fifth time relay 5KT, a sixth time relay 6KT, a seventh time relay 7KT, a first electromagnetic relay 1KA, a second electromagnetic relay 2KA, a first pressure sensor 1PS, a second pressure sensor 2PS, a first rotary knob multi-gear switch SAC1, a second rotary knob multi-gear switch SAC2, a third rotary knob multi-gear switch SAC3, a fourth rotary knob multi-gear switch SAC4, a fifth rotary knob multi-gear switch SAC5, a sixth rotary knob multi-gear switch SAC6, a seventh rotary knob multi-gear switch SAC7, a first upper limit switch ULS1, a second upper limit switch ULS2, a third upper limit switch ULS3, a fourth upper limit switch ULS4, a fifth upper limit switch ULS5, a sixth upper limit switch ULS6, a seventh upper limit switch ULS7, a first lower limit switch LLS1, a second lower limit switch LLS2, a third lower limit switch LLS3, a fourth lower limit switch LLS4, a fifth lower limit switch LLS5, a sixth lower limit switch LLS6, a seventh lower limit switch LLS7. Figure 3As shown, it further comprises: a sixth electromagnetic relay 6KA, a seventh electromagnetic relay 7KA, a fourth indicator buzzer 4HR, a fifth indicator buzzer 5HR, a reset switch 5SB;

[0103] 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 time delay 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 time delay normally open auxiliary contact of the sixth time relay 6KT, one end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA, the other end of the time delay 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 buzzer 4HR, the other end of the coil of the sixth electromagnetic relay 6KA and the other end of the fourth indicator buzzer 4HR are connected to the zero line; the other end of the time delay 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 buzzer 5HR, the other end of the coil of the seventh electromagnetic relay 7KA and the other end of the fifth indicator buzzer 5HR are connected to the zero line.

[0104] Further, when the fifth time relay 5KT reaches the preset working time of 5KT, the time delay normally open auxiliary contact of the fifth time relay 5KT is closed, the coil of the sixth electromagnetic relay 6KA is powered, the normally open auxiliary contact of the sixth electromagnetic relay 6KA is closed, and the fourth indicator buzzer 4HR alarms;

[0105] When the sixth time relay 6KT reaches the preset working time of 6KT, the time delay normally open auxiliary contact of the sixth time relay 6KT is closed, the coil of the seventh electromagnetic relay 7KA is powered, the normally open auxiliary contact of the seventh electromagnetic relay 7KA is closed, and the fifth indicator buzzer 5HR alarms.

[0106] It should be noted that the indicator buzzer alarms according to the real-time situation of the water pump motor, which is conducive to the timely treatment of the on-duty personnel, thereby improving the service life of the equipment.

[0107] Embodiment 4

[0108] Based on the water pump control device and method described in Embodiment 1, i.e., the same water pump control device and method as in Embodiment 1 is adopted in this embodiment. As shown in Figure 4 As shown, it further comprises: a first indicator 1HG, a second indicator 2HG;

[0109] One end of the first indicator 1HG is connected to one end of the coil of the first contactor 1KM, and the other end of the first indicator 1HG is connected to the other end of the coil of the first contactor 1KM;

[0110] One end of the second indicator lamp 2HG is connected to one end of the coil of the second contactor 2KM, and the other end of the second indicator lamp 2HG is connected to the other end of the coil of the second contactor 2KM.

[0111] Embodiment 5

[0112] Based on the water pump control device and method described in Embodiment 1, this embodiment adopts the same water pump control device and method as Embodiment 1. As shown in Figure 5 It also includes: a first thermal relay 1KH, a second thermal relay 2KH;

[0113] One end of the main contact of the first thermal relay 1KH is connected to the first water pump motor M1, and 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;

[0114] 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 zero line;

[0115] 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 zero line.

[0116] Embodiment 6

[0117] Based on the water pump control device and method described in Embodiment 5, this embodiment adopts the same water pump control device and method as Embodiment 5. As shown in Figure 6 It also includes: a second indicator lamp buzzer 2HR, a third electromagnetic relay 3KA;

[0118] 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, and 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. The other end of the coil of the third electromagnetic relay 3KA is connected to the zero line;

[0119] 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, and the other end of the normally open auxiliary contact of the third electromagnetic relay 3KA is connected to one end of the second indicator lamp buzzer 2HR. The other end of the second indicator lamp buzzer 2HR is connected to the zero line.

[0120] Embodiment 7

[0121] Based on the water pump control device and method described in Embodiment 5, i.e., the same water pump control device and method as in Embodiment 5 is adopted in this embodiment. As shown in Figure 7 It further includes a fourth electromagnetic relay 4KA and a third indicator buzzer 3HR.

[0122] 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 zero line.

[0123] 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 buzzer 3HR, and the other end of the third indicator buzzer 3HR is connected to the zero line.

[0124] Embodiment 8

[0125] Based on the water pump control device and method described in Embodiment 1, i.e., the same water pump control device and method as in Embodiment 1 is adopted in this embodiment. As shown in Figure 8 It further includes a third indicator 1HR.

[0126] One phase of the three-phase power supply is connected to one end of the third indicator 1HR, and the other end of the third indicator 1HR is connected to the zero line.

[0127] Embodiment 9

[0128] Based on the water pump control device and method described in Embodiment 1, i.e., the same water pump control device and method as in Embodiment 1 is adopted in this embodiment. As shown in Figure 9 It further includes a first switch 1QF and a second switch 2QF.

[0129] One phase of 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.

[0130] One phase of 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.

[0131] Embodiment 10

[0132] Based on the water pump control device and method described in Embodiment 3, i.e., the same water pump control device and method as in Embodiment 3 is adopted in this embodiment. As shown in Figure 10 It further includes a first fuse 1FU, a second fuse 2FU, and a third fuse 3FU.

[0133] One phase of three-phase power supply is connected with one end of the first fuse 1FU, the other end of the first fuse 1FU is connected with 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, one end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA;

[0134] The other end of the main contact of the first contactor 1KM is connected with one end of the second fuse 2FU, the other end of the second fuse 2FU is connected with the first end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the second input end of the second knob multi-gear switch SAC2;

[0135] One end of the third fuse 3FU is connected with the other end of the main contact of the second contactor 2KM, the other end of the third fuse 3FU is connected with the third end of the normally open auxiliary contact of the first electromagnetic relay 1KA, the eighth input end of the second knob multi-gear switch SAC2, the thirteenth input end of the second knob multi-gear switch SAC2.

[0136] The same or similar reference signs correspond to the same or similar components;

[0137] The terms used for describing the positional relationship in the drawings are only used for example and should not be understood as the limitation of the patent;

[0138] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not the limitation of the embodiments of the present application. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

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

2. The water pump control device according to claim 1, characterized by Further comprising: The second rotary knob multi-gear switch SAC2, the third time relay 3KT and the fourth time relay 4KT; One phase of the three-phase power supply is connected with the second input end of the second rotary multi-position switch SAC2, the eighth input end of the second rotary multi-position switch SAC2, and the thirteenth input end of the second rotary multi-position switch SAC2; the first end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected with the fourth input end of the second rotary multi-position switch SAC2, the fifth input end of the second rotary multi-position switch SAC2, and the sixth input end of the second rotary multi-position switch SAC2, and the third end of the normally closed auxiliary contact of the fifth electromagnetic relay 5KA is connected with the tenth input end of the second rotary multi-position switch SAC2, the eleventh input end of the second rotary multi-position switch SAC2, and the twelfth input end of the second rotary multi-position switch SAC2; The second output end of the second rotary multi-position switch SAC2 is connected with the first input end of the first rotary multi-position switch SAC1, the fourth output end of the second rotary multi-position switch SAC2 is connected with the second input end of the first rotary multi-position switch SAC1, and the sixth output end of the second rotary multi-position switch SAC2 is connected with the third input end of the first rotary multi-position switch SAC1; the eighth output end of the second rotary multi-position switch SAC2 is connected with the fourth input end of the first rotary multi-position switch SAC1, the tenth output end of the second rotary multi-position switch SAC2 is connected with the fifth input end of the first rotary multi-position switch SAC1, and the twelfth output end of the second rotary multi-position switch SAC2 is connected with the sixth input end of the first rotary multi-position switch SAC1; The fifth output end of the second rotary multi-position switch SAC2 is connected with the first end of the time relay 3KT delay normally closed auxiliary contact and the first end of the time relay 3KT delay normally open auxiliary contact, the second end of the time relay 3KT delay normally closed auxiliary contact is connected with the second output end of the first rotary multi-position switch SAC1, and the second end of the time relay 3KT delay normally open auxiliary contact is connected with the time relay 1KT delay normally open auxiliary contact; The eleventh output end of the second rotary multi-position switch SAC2 is connected with the third end of the time relay 3KT delay normally closed auxiliary contact and the third end of the time relay 3KT delay normally open auxiliary contact, the fourth end of the time relay 3KT delay normally closed auxiliary contact is connected with the time relay 2KT delay normally open auxiliary contact, and the fourth end of the time relay 3KT delay normally open auxiliary contact is connected with the fifth output end of the first rotary multi-position switch SAC1; The thirteenth output end of the second rotary multi-position switch SAC2 is connected with the fifth end of the time relay 3KT delay normally open auxiliary contact and the one end of the time relay 3KT coil, the sixth end of the time relay 3KT delay normally open auxiliary contact is connected with the one end of the time relay 4KT coil, the other end of the time relay 3KT coil is connected with the one end of the time relay 4KT normally closed auxiliary contact, the other end of the time relay 4KT normally closed auxiliary contact and the other end of the time relay 4KT coil are connected with the zero line.

3. The water pump control device according to claim 2, characterized by Further comprising: The sixth electromagnetic relay 6KA, the seventh electromagnetic relay 7KA, the fourth indicator buzzer 4HR, the fifth indicator buzzer 5HR, the reset switch 5SB; One phase of the three-phase power supply is connected with one end of the reset switch 5SB, the other end of the reset switch 5SB is connected with one end of the time delay 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 time delay normally open auxiliary contact of the sixth time relay 6KT, one end of the normally open auxiliary contact of the seventh electromagnetic relay 7KA, the other end of the time delay 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 with one end of the coil of the sixth electromagnetic relay 6KA and one end of the fourth indicator buzzer 4HR, the other end of the coil of the sixth electromagnetic relay 6KA and the other end of the fourth indicator buzzer 4HR are connected with the zero line; the other end of the time delay 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 with one end of the coil of the seventh electromagnetic relay 3KA and one end of the fifth indicator buzzer 5HR, the other end of the coil of the seventh electromagnetic relay 3KA and the other end of the fifth indicator buzzer 5HR are connected with the zero line.

4. The water pump control device according to any one of claims 1 to 3, characterized by Further comprising: The first indicator 1HG, the second indicator 2HG; One end of the first indicator 1HG is connected with one end of the coil of the first contactor 1KM, the other end of the first indicator 1HG is connected with the other end of the coil of the first contactor 1KM; One end of the second indicator 2HG is connected with one end of the coil of the second contactor 2KM, the other end of the second indicator 2HG is connected with the other end of the coil of the second contactor 2KM.

5. The water pump control device according to any one of claims 1 to 3, characterized by Further comprising: The first thermal relay 1KH, the second thermal relay 2KH; One end of the main contact of the first thermal relay 1KH is connected with the first water pump motor M1, the other end of the main contact of the first thermal relay 1KH is connected with 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 with the second water pump motor M2, the other end of the main contact of the second thermal relay 2KH is connected with the second contactor 2KM; The other end of the coil of the first contactor 1KM is connected with one end of the normally closed auxiliary contact of the first thermal relay 1KH, the other end of the normally closed auxiliary contact of the first thermal relay 1KH is connected with the zero line; The other end of the coil of the second contactor 2KM is connected with one end of the normally closed auxiliary contact of the second thermal relay 2KH, the other end of the normally closed auxiliary contact of the second thermal relay 2KH is connected with the zero line.

6. The water pump control device according to claim 5, characterized by Further comprising: The second indicator buzzer 2HR, the third electromagnetic relay 3KA; One phase of the three-phase power supply is connected with 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 with one end of the coil of the third electromagnetic relay 3KA, the other end of the coil of the third electromagnetic relay 3KA is connected with the zero line; One phase of the three-phase power supply is connected with 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 with one end of the second indicator buzzer 2HR, the other end of the second indicator buzzer 2HR is connected with the zero line.

7. The water pump control apparatus according to claim 5, characterized by Also includes: Fourth electromagnetic relay 4KA, third indicator lamp buzzer 3HR; 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, and 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. The other end of the coil of the fourth electromagnetic relay 4KA is connected to the zero 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, and the other end of the normally open auxiliary contact of the fourth electromagnetic relay 4KA is connected to one end of the third indicator lamp buzzer 3HR. The other end of the third indicator lamp buzzer 3HR is connected to the zero line.

8. The water pump control device according to any one of claims 1 to 3, characterized by Also includes: Third indicator lamp 1HR; One phase of the three-phase power supply is connected to one end of the third indicator lamp 1HR, and the other end of the third indicator lamp 1HR is connected to the zero line.

9. The water pump control device according to any one of claims 1 to 3, characterized by Also includes: First switch 1QF, second switch 2QF; One end of the three-phase power supply is connected to 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. One end of the three-phase power supply is connected to 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.

10. The water pump control apparatus according to claim 3, characterized by Also includes: First fuse 1FU, second fuse 2FU, 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 lamp 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-gear switch SAC2. One end of the third fuse 3FU is connected to the other end of the main contact of the second contactor 2KM, 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-gear switch SAC2, and the thirteenth input end of the second knob multi-gear switch SAC2.

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