A submersible pump one-in-one-standby control system and method

Abstract

A submersible pump one-in-one-standby control system and method, after drawing power from the mains busbar through a first power module and a second power module, a first electrical signal and a second electrical signal are output respectively, the first electrical signal is transmitted to the first control module via a first switch module, and the second electrical signal is transmitted to the second control module via a second switch module. The first control module and the second control module work or stop working accordingly according to the signal output by the liquid level detection module, so as to respectively control the first submersible pump and the second submersible pump to pump out the accumulated water; the liquid level detection module monitors the liquid level in the sump, and outputs a corresponding signal to the first control module or the second control module according to the liquid level. The above-mentioned submersible pump one-in-one-standby control system and method adopts two power modules to supply two submersible pumps and their control modules respectively, and when any control module or submersible pump fails, it does not affect the operation of the remaining control modules and submersible pumps.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical control, and in particular relates to a submersible pump one-in-one-standby control system and method. Background Art

[0002] The basement of a building often has equipment rooms, including a transformer room, an air-conditioning room or a pump room. In order to prevent water accumulation in the basement from damaging the equipment in the equipment room and causing safety accidents, the water in the basement needs to be drained in time. Since the basement of the building is at a low elevation, it is impossible to drain the water to the municipal pipe network by gravity when draining. Therefore, a sump is required, and the water in the sump is pumped to the outdoor inspection well by a submersible pump. At present, traditional submersible pump control technology solutions usually use a single power supply to supply two or more submersible pump control circuits. When one of the circuits fails, it needs to be overhauled under power in order not to affect the remaining submersible pump control circuits. Therefore, the safety is low and the maintenance project is complicated.

[0003] Therefore, the traditional submersible pump control technology solution has the problem of using a single power supply to supply two or more submersible pump control circuits. When one of the circuits fails, it needs to be repaired under power, resulting in low safety and complicated maintenance engineering. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a submersible pump one-in-one-standby control system and method, aiming to solve the problem in traditional technical solutions that a single power supply is used to supply two or more submersible pump control circuits, resulting in low safety and complicated maintenance engineering when one of the circuits fails and requires live maintenance.

[0005] A first aspect of an embodiment of the present invention provides a submersible pump one-in-one-standby control system, comprising:

[0006] A first power supply module and a second power supply module are respectively used to output a first electrical signal and a second electrical signal by taking power from the mains;

[0007] A first switch module connected to the first power module and configured to conduct when closed and transmit the first electrical signal;

[0008] A second switch module connected to the second power supply module and configured to conduct when closed and transmit the second electrical signal;

[0009] A first control module connected to the first switch module, and used to control the first submersible pump to work when receiving a first pump start signal, or to control the first submersible pump to stop working when receiving a first pump stop signal;

[0010] A second control module connected to the second switch module and the first control module, and configured to control the second submersible pump to operate upon receiving a second pump start signal, or to control the second submersible pump to stop operating upon receiving a second pump stop signal; and

[0011] A liquid level detection module connected to the first control module and the second control module, used to monitor the liquid level in the sump, and output the first pump start signal and / or the second pump start signal when the liquid level reaches the pump start point; or output the first pump stop signal and / or the second pump stop signal when the liquid level is lower than the pump stop point.

[0012] A second aspect of an embodiment of the present invention provides a submersible pump one-in-one-standby control method, comprising:

[0013] The first power module and the second power module are used to draw power from the mains, and output a first electrical signal and a second electrical signal respectively;

[0014] The first switch module is used to conduct when closed and transmit the first electrical signal;

[0015] Adopting the second switch module to conduct when closed and transmit the second electrical signal;

[0016] The first control module controls the first submersible pump to work when receiving the first pump start signal, or controls the first submersible pump to stop working when receiving the first pump stop signal;

[0017] The second control module controls the second submersible pump to work when receiving the second pump start signal, or controls the second submersible pump to stop working when receiving the second pump stop signal;

[0018] A liquid level detection module is used to monitor the liquid level in the sump, and when the liquid level reaches the pump start point, the first pump start signal and / or the second pump start signal is output; or when the liquid level is lower than the pump stop point, the first pump stop signal and / or the second pump stop signal is output.

[0019] The above-mentioned one-for-one-standby control system and method for submersible pumps is provided with a first power module and a second power module. The first power module supplies power to the first control module through the first switch module, and supplies power to the first submersible pump at the same time. The second power module supplies power to the second control module through the second switch module, and supplies power to the second submersible pump at the same time. Therefore, when one of the control modules or one of the submersible pumps fails, the other control module or submersible pump continues to work without being affected, and no live maintenance is required, which has high safety and simple maintenance engineering. The first control module and the second control module work according to the signal output by the liquid level detection module to realize that when the liquid level in the sump is greater than the pump start point, the first submersible pump or the second submersible pump is controlled to pump out the accumulated water. The above-mentioned one-for-one-standby control system and method for submersible pumps adopts two power modules to supply two submersible pumps and their control modules respectively. When any control module or submersible pump fails, it does not affect the operation of the remaining control modules and submersible pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the module structure of a submersible pump one-in-one-standby control system provided by an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A partial electrical schematic diagram of a submersible pump one-for-one-standby control system is shown;

[0023] Figure 3 for Figure 1 The electrical schematic diagram of the liquid level detection principle in a submersible pump one-for-one control system is shown;

[0024] Figure 4 for Figure 1 The electrical schematic diagram of the first control module in a submersible pump one-for-one-standby control system shown;

[0025] Figure 5 for Figure 1 The electrical schematic diagram of the second control module in a submersible pump one-for-one-standby control system shown;

[0026] Figure 6 A flowchart of the steps of a submersible pump one-in-one-standby control method provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] See also Figure 1 , is a schematic diagram of the module structure of a submersible pump one-for-one-standby control system provided by an embodiment of the present invention. For the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows:

[0029] A submersible pump one-in-one-standby control system includes a first power module 10, a second power module 11, a first switch module 20, a second switch module 21, a first control module 30, a second control module 31 and a liquid level detection module 50.

[0030] The first power module 10 and the second power module 11 are powered by the mains and are used to output a first electrical signal and a second electrical signal respectively.

[0031] The mains power is 220V AC. The first electrical signal output by the first power module 10 is supplied to the first control module 30 and the first submersible pump 40 for operation, and the second electrical signal output by the second power module 11 is supplied to the second control module 31 and the second submersible pump 41 for operation. When any control module or submersible pump is overloaded or short-circuited, the other control module and submersible pump can keep running without affecting the pumping process, which is highly safe and ensures that the equipment in the equipment room will not be soaked in water and damaged or even cause accidents.

[0032] The first switch module 20 is connected to the first power module 10, and is used to conduct when closed and transmit a first electrical signal. The second switch module 21 is connected to the second power module 11, and is used to conduct when closed and transmit a second electrical signal.

[0033] In an optional embodiment, the first switch module 20 and the second switch module 21 are implemented by the first circuit breaker 1QF and the second circuit breaker 2QF, respectively. The incoming line end of the first circuit breaker 1QF and the incoming line end of the second circuit breaker 2QF are respectively connected to the first power module 10 and the second power module 11. Specifically, in the submersible pump one-for-one-standby control system provided by the present invention, in the initial state, the first circuit breaker 1QF and the second circuit breaker 2QF are both in the closed state, respectively transmitting the first electrical signal output by the first power module 10 and the second electrical signal output by the second power module 11.

[0034] The first control module 30 is connected to the first switch module 20, and is used to control the first submersible pump 40 to work when receiving the first pump start signal, or to control the first submersible pump 40 to stop working when receiving the first pump stop signal. The second control module 31 is connected to the second switch module 21 and the first control module 30, and is used to control the second submersible pump 41 to work when receiving the second pump start signal, or to control the second submersible pump 41 to stop working when receiving the second pump stop signal.

[0035] Specifically, the first control module 30 is connected to the outlet terminal of the first circuit breaker 1QF, and the second control module 31 is connected to the outlet terminal of the second circuit breaker 2QF. When the first circuit breaker 1QF / the second circuit breaker 2QF is turned on, the first electrical signal / the second electrical signal output by the first power module 10 / the second power module 11 is transmitted to the first control module 30 / the second control module 31 via the first circuit breaker 1QF / the second circuit breaker 2QF.

[0036] The liquid level detection module 50 is connected to the first control module 30 and the second control module 31, and is used to monitor the liquid level in the sump, and when the liquid level reaches the pump start point, outputs the first pump start signal and / or the second pump start signal; or when the liquid level is lower than the pump stop point, outputs the first pump stop signal and / or the second pump stop signal.

[0037] Specifically, the elevation difference between the pump start point and the pump stop point is less than or equal to the height of the sump. When the liquid level in the sump reaches the pump start point, it means that there is a lot of water in the sump and it is necessary to pump the water to the inspection well in time; when the liquid level in the sump drops to the pump stop point, it means that there is less water in the sump and the water will not endanger the equipment in the equipment room, so the submersible pump does not need to work.

[0038] See also Figure 2 ,for Figure 1 The partial electrical schematic diagram of a submersible pump one-for-one-standby control system shown in the figure, for the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0039] Figure 2 L1 is used to represent the mains, 00 is used to represent the busbar of the mains L1, and the incoming terminal of the first circuit breaker 1QF and the incoming terminal of the second circuit breaker 2QF are both connected to the mains busbar 00. The first control module 30 is connected to the outgoing terminal of the first circuit breaker 1QF, and the connection point between the two is represented by 1L11; the second control module 31 is connected to the outgoing terminal of the second circuit breaker 2QF, and the connection point between the two is represented by 2L11. Figure 2 In the figure, 01 is used to represent the bus of the first control module 30, and the first control module 30 is powered by 01, that is, receives the first electrical signal; 02 is used to represent the bus of the second control module 31, and the second control module 31 is powered by 02, that is, receives the second electrical signal.

[0040] Figure 2 The 1KM shown is the first contactor described below, Figure 2 Only the main contact 1KM0 of the first contactor is shown; 1KH is the first thermal relay described below, Figure 2 Only the main contact of the first thermal relay is shown; 2KM is the second contactor described below, Figure 2 Only the main contact 2KM0 of the second contactor is shown; 2KH is the second thermal relay described below, Figure 2 Only the main contacts of the second thermal relay are shown. Figure 2 The first submersible pump 40 and the second submersible pump 41 are represented by 1# pump and 2# pump, respectively.

[0041] In an optional embodiment, the first circuit breaker 1QF, the first contactor 1KM and the first thermal relay 1KH are all installed in the first drawer unit 1CT; the first drawer unit 1CT includes a first secondary connector. The second circuit breaker 2QF, the second contactor 2KM and the second thermal relay 2KH are all installed in the second drawer unit 2CT; the second drawer unit 2CT includes a second secondary connector. In the initial state of the submersible pump one-in-one-standby control system, the first drawer unit 1CT and the second drawer unit 2CT are in their respective working positions, so that the mains power is introduced, and the first circuit breaker 1QF and the second circuit breaker 2QF are both in the closed state.

[0042] By installing the circuit breaker, contactor and thermal relay in the drawer unit and controlling the two routes separately, electrical isolation is achieved. When one control module or submersible pump fails, the other control module and submersible pump keep working without the need for live maintenance, thus ensuring the personal safety of the maintenance personnel. The entire one-for-one-standby water pump control system has high safety and reliability.

[0043] See also Figure 3 ,for Figure 1 The electrical schematic diagram of the liquid level detection principle in a submersible pump one-for-one control system is shown. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0044] The liquid level detection module 50 provided in the embodiment of the present invention includes a first fuse 3FU, a first intermediate relay 3K and a liquid level signaler YW. The first intermediate relay 3K includes a first coil, a first normally open contact 3K0, a second normally open contact 3K1 and a third normally open contact 3K2, and the liquid level signaler YW includes a high liquid level normally open contact K3 and a low liquid level normally closed contact K4.

[0045] The first end of the first fuse 3FU is connected to the live wire of the mains, the second end of the first fuse 3FU is connected to the first end of the low liquid level normally closed contact K4, the second end of the low liquid level normally closed contact K4, the first end of the high liquid level normally open contact K3 and the first end of the first normally open contact 3K0 are connected together; the second end of the high liquid level normally open contact K3, the second end of the first normally open contact 3K0 and the first end of the first coil of the first intermediate relay 3K are connected together, and the second end of the first coil is connected to the neutral wire of the mains. The second normally open contact 3K1 is connected to the first control module 30, and the third normally open contact 3K2 is connected to the second control module 31.

[0046] Specifically, the liquid level signal device YW is installed in the sump. When the liquid level in the sump is lower than the pump stop point, the low liquid level normally closed contact K4 is disconnected. When the liquid level in the sump reaches or exceeds the pump stop point, the low liquid level normally closed contact K4 is closed; when the liquid level in the sump reaches or exceeds the pump start point, the high liquid level normally open contact K3 is closed. It is worth noting that, relative to the position of the pump start point, the pump stop point is closer to the bottom of the sump; according to the principle of gravity, the accumulated water in the sump must first overflow the pump stop point before it can reach the pump start point. The elevation difference between the pump start point and the pump stop point is less than or equal to the height of the sump. The position of the pump start point and the position of the pump stop point can be set according to actual needs.

[0047] When the liquid level in the sump reaches the pump start point, the high liquid level normally open contact K3 of the liquid level signal device YW is triggered to close, and the first pump start signal and the second air pump signal are issued. At this time, the mains L1 has power, and the current passes through the first fuse 3FU, the low liquid level normally closed contact K4 and the high liquid level normally open contact K3 of the liquid level signal device YW, and the secondary connector 1CZ9 of the first drawer unit 1CT in sequence, so that the first coil of the first intermediate relay 3K is energized and attracted, and the first normally open contact 3K0 of the intermediate relay is closed to form a self-holding circuit. The first coil remains attracted, and the second normally open contact 3K1 and the third normally open contact 3K2 are closed, respectively starting the 1# pump or 2# pump control circuit.

[0048] When the liquid level in the sump reaches the pump stop point, the low liquid level normally closed contact K4 of the trigger level signal YW is disconnected, and the first pump stop signal and the second pump stop signal are issued, so that the first coil loses power, the first normally open contact 3K0, the second normally open contact 3K1 and the third normally open contact 3K2 of the intermediate relay are all disconnected, and the first control module 30 and the second control module 31 are both powered off and stop running. It is worth noting that the third normally open contact 3K2 of the first intermediate relay 3K is connected to the second drawer unit 2CT through the first secondary connectors 1CZ11 and 1CZ12 of the first drawer unit 1CT, thereby achieving electrical connection.

[0049] The liquid level in the sump is monitored in real time by the liquid level detection module 50. When the liquid level reaches the pump start point, the first control module 30 and the second control module 31 are powered on to work, thereby controlling the first submersible pump 40 and the second submersible pump 41 to work and pump out the accumulated water in the sump to prevent the accumulated water from damaging the equipment in the basement, with high reliability.

[0050] See also Figure 4 ,for Figure 1 The electrical schematic diagram of the first control module 30 in the one-for-one-standby submersible pump control system shown in the figure only shows the part related to the present embodiment for the convenience of explanation, which is described in detail as follows:

[0051] The first control module 30 provided in the embodiment of the present invention includes a second fuse 1FU, a second intermediate relay 1K, a first thermal relay 1KH, a first contactor 1KM, a first time relay 1KT, a first closing button 1S2, a first opening button 1S1, a first fault relief button 1S0, and also includes the first gate position ①②, the second gate position ③④ and the third gate position ⑤⑥ of the switching switch SA.

[0052] The second intermediate relay 1K includes a second coil, a fifth normally open contact 1K1 and a first normally closed contact 1K2; the first thermal relay 1KH includes a first main contact and a first thermal overload contact 1KH1; the first time relay 1KT includes a third coil and a first delay contact 1KT1; the first contactor 1KM includes a fourth coil, a second normally closed contact 1KM1, a third normally closed contact 1KM3, a sixth normally open contact 1KM2 and a second main contact 1KM0.

[0053] The first end of the second fuse 1FU is connected to the first switch module 20, and the second end of the second fuse 1FU, the first end of the fifth normally open contact 1K1, the first end of the first thermal overload contact 1KH1, the first end of the first normally closed contact 1K2 and the first end of the second normally closed contact 1KM1 are connected together; the second end of the fifth normally open contact 1K1, the second end of the first thermal overload contact 1KH1 and the first end of the first fault release button 1S0 are connected together, the second end of the first fault release button 1S0 is connected together with the first end of the second coil of the second intermediate relay 1K, and the second end of the second coil is connected to the neutral line.

[0054] The second end of the first normally closed contact 1K2, the first end of the first gate position ①② and the first end of the second normally open contact 3K1 are connected together, the second end of the second normally open contact 3K1, the first end of the second gate position ③④ and the first end of the third gate position ⑤⑥ are connected together, the second end of the first gate position ①② is connected to the first end of the first opening button 1S1, the second end of the first opening button 1S1, the first end of the sixth normally open contact 1KM2 and the first end of the first closing button 1S2 are connected together; the second end of the first closing button 1S2, the first end of the fourth coil, the second end of the second gate position ③④ and the first end of the first delay contact 1KT1 are connected together, and the second end of the fourth coil is connected to the neutral line; the second end of the first delay contact 1KT1 and the second end of the third gate position ⑤⑥ are connected to the second control module 31, the first end of the third coil is connected to the second control module 31, and the second end of the third coil is connected to the neutral line.

[0055] A first end of the second main contact 1KM0 is connected to the first switch module 20 , a second end of the second main contact 1KM0 is connected to a first end of the first main contact, and a second end of the first main contact is connected to the first submersible pump 40 .

[0056] The first control module 30 further includes a first indicator light 1HW1, a second indicator light 1HW2, a third indicator light 1HG1, a fourth indicator light 1HG2 and a fifth indicator light 1HY. The fifth indicator light 1HY is connected to both ends of the second coil, the first indicator light 1HW1 is connected to both ends of the fourth coil, the first end of the second indicator light 1HW2 is connected to the second end of the second gate position ③④, and the second end of the second indicator light 1HW2 is connected to the neutral line; the first end of the third indicator light 1HG1 is connected to the second end of the second normally closed contact 1KM1, and the second end of the third indicator light 1HG1 is connected to the neutral line; the fourth indicator light 1HG2 is connected to both ends of the third indicator light 1HG1.

[0057] See also Figure 5 ,for Figure 1 The electrical schematic diagram of the second control module 31 in the one-for-one-standby submersible pump control system shown in the figure only shows the part related to the present embodiment for the convenience of explanation, which is described in detail as follows:

[0058] The second control module 31 provided in the embodiment of the present invention includes a third fuse 2FU, a third intermediate relay 2K, a second thermal relay 2KH, a second contactor 2KM, a second time relay 2KT, a second closing button 2S2, a second opening button 2S1, a second fault relief button 2S0, and also includes the fourth gate position ⑦⑧, the fifth gate position ⑨⑩ and the sixth gate position of the transfer switch SA

[0059] The third intermediate relay 2K includes a fifth coil, a seventh normally open contact 2K1 and a fourth normally closed contact 2K2; the second thermal relay 2KH includes a fourth main contact and a second thermal overload contact 2KH1; the second time relay 2KT includes a sixth coil and a second delay contact 2KT1; the second contactor 2KM includes a seventh coil, a fifth normally closed contact 2KM1, a sixth normally closed contact 2KM3, an eighth normally open contact 2KM2 and a third main contact 2KM0.

[0060] The first end of the third fuse 2FU is connected to the second switch module 21, and the second end of the third fuse 2FU, the first end of the seventh normally open contact 2K1, the first end of the second thermal overload contact 2KH1, the first end of the fourth normally closed contact 2K2 and the first end of the fifth normally closed contact 2KM1 are connected together; the second end of the seventh normally open contact 2K1, the second end of the second thermal overload contact 2KH1 and the first end of the second fault relief button 2S0 are connected together, and the second end of the second fault relief button 2S0 is connected to the first end of the fifth coil of the third intermediate relay 2K, and the second end of the fifth coil is connected to the neutral line.

[0061] The second end of the fourth normally closed contact 2K2, the first end of the fourth gate ⑦⑧ and the first end of the third normally open contact 3K2 are connected together, and the second end of the third normally open contact 3K2, the first end of the fifth gate ⑨⑩ and the sixth gate The first end of the fourth gate position ⑦⑧ is connected together, the second end of the fourth gate position ⑦⑧ is connected to the first end of the second opening button 2S1, the second end of the second opening button 2S1, the first end of the eighth normally open contact 2KM2 and the first end of the second closing button 2S2 are connected together; the second end of the second closing button 2S2, the first end of the seventh coil, the sixth gate position The second end of the second delay contact 2KT1 and the first end of the second delay contact 2KT1 are connected together, and the second end of the seventh coil is connected to the neutral line; the second end of the second delay contact 2KT1 and the second end of the fifth gate position ⑨⑩ are connected to the first control module 30, the first end of the sixth coil is connected to the first control module 30, and the second end of the sixth coil is connected to the neutral line.

[0062] A first end of the third main contact 2KM0 is connected to the second switch module 21 , a second end of the third main contact 2KM0 is connected to a first end of the fourth main contact, and a second end of the fourth main contact is connected to the second submersible pump 41 .

[0063] The second control module 31 further includes a sixth indicator light 2HW1, a seventh indicator light 2HW2, an eighth indicator light 2HG1, a ninth indicator light 2HG2 and a tenth indicator light 2HY. The tenth indicator light 2HY is connected to both ends of the fifth coil, the sixth indicator light 2HW1 is connected to both ends of the seventh coil, and the first end of the seventh indicator light 2HW2 is connected to the sixth gate. The second end of the seventh indicator light 2HW2 is connected to the neutral line; the first end of the eighth indicator light 2HG1 is connected to the second end of the fifth normally closed contact 2KM1, and the second end of the eighth indicator light 2HG1 is connected to the neutral line; the ninth indicator light 2HG2 is connected to both ends of the eighth indicator light 2HG1.

[0064] One end of the first fuse 3FU, one end of the second fuse 1FU and one end of the third fuse 2FU are connected to the live wire, and the other ends are connected to their respective controlled elements. The coil of the first intermediate relay 3K, the coil of the second intermediate relay 1K, the coil of the first time relay 1KT and the coil of the second time relay 2KT as well as multiple indicator lights are directly connected to the neutral wire or connected to the neutral wire through the secondary connector inside the first drawer unit 1CT / the second drawer unit 2CT.

[0065] Combine the following Figure 2 , Figure 3 , Figure 4 as well as Figure 5 , the working principle of the submersible pump one-in-one-standby control system provided by the embodiment of the present invention is described in detail:

[0066] The submersible pump one-in-one-standby control system provided in the embodiment of the present invention has three control modes.

[0067] Method 1: In the first drawer unit 1CT, since the first circuit breaker 1QF is closed, the connection point 1L11 is energized, and the current passes through the second fuse 1FU, the second normally closed contact 1KM1 of the first contactor 1KM and the first secondary connector 1CZ1 in sequence to light up the third indicator light 1HG1 and the fourth indicator light 1HG2. Switch the transfer switch SA to "1# working 2# standby gear". At this time, the second gate positions ③④ and the fifth gate position ⑨⑩ of the transfer switch SA are turned on. When the liquid level signal device sends out the first pump start signal and the second normally open contact 3K1 of the first intermediate relay 3K is closed, the current passes through the second fuse 1FU, the first normally closed contact 1K2 of the second intermediate relay 1K, the second normally open contact 3K1 of the first intermediate relay 3K, the first secondary connector 1CZ3 of the first drawer unit, and the second gate positions ③④ of the transfer switch SA in sequence, so that the coil of the first contactor 1KM is energized and the first indicator light 1HW1 and the second indicator light 1HW2 are lit, the second normally closed contact 1KM1 of the first contactor 1KM is disconnected, the third indicator light 1HG1 and the fourth indicator light 1HG2 are turned off, and at the same time, the second main contact 1KM0 of the first contactor 1KM is closed, the first power module 10 is connected, and the 1# pump is driven to work. Since the third normally closed contact 1KM3 of the first contactor 1KM is disconnected at this time, the coil of the second time relay 2KT cannot be energized and the 2# pump cannot be started. It should be noted that the third normally closed contact 1KM3 of the first contactor 1KM is connected to the second drawer unit 2CT through the first and second connectors 1CZ13 and 1CZ14 of the first drawer unit 1CT, thereby achieving electrical connection.

[0068] When the 1# pump has an overload fault, the first thermal overload contact 1KH1 of the first thermal relay 1KH is closed, and the current passes through the second fuse 1FU, the first thermal overload contact 1KH1 of the first thermal relay 1KH, and the first fault release button 1SO in sequence, so that the coil of the second intermediate relay 1K is energized and attracted, the fifth indicator light 1HY is lit, and a fault alarm signal is issued. The fifth normally open contact 1K1 of the second intermediate relay 1K is closed, the first normally closed contact 1K2 is disconnected, the coil of the first contactor 1KM loses power, the second normally closed contact 1KM1 is closed, and the third normally closed contact 1KM3 is closed, the first indicator light 1HW1 and the second indicator light 1HW2 are extinguished, and the third indicator light 1HG1 and the fourth indicator light 1HG2 are lit. At the same time, the second main contact 1KM0 of the first contactor 1KM is disconnected, the first electrical signal is cut off, and the load device 1# pump is shut down.

[0069] At the same time, in the second drawer unit 2CT, the second circuit breaker 2QF is in the closing standby state, and the current passes through the third fuse 2FU, the contact 2K2 of the third intermediate relay 2K, the second secondary connector 2CZ2 of the second drawer unit, the third normally open contact 3K2 of the first intermediate relay 3K, the fifth gate position ⑨⑩ of the conversion switch SA, the third normally closed contact 1KM3 of the first contactor 1KM, and the second secondary connector 2CZ8 of the second drawer unit, so that the coil of the second time relay 2KT is energized and attracted. The second time relay 2KT is a power-on delay type with a delay time range of 0 seconds to 60 seconds. After the preset delay time, the second delay contact 2KT1 of the second time relay 2KT is closed, and the current passes through the third fuse 2FU, the contact 2K2 of the third intermediate relay 2K, The second secondary connector 2CZ2 of the second drawer unit, the third normally open contact 3K2 of the first intermediate relay 3K, the fifth gate position ⑨⑩ of the transfer switch SA, the second secondary connector 2CZ6 of the second drawer unit, the delay contact 2KT1 of the second time relay 2KT, and the second secondary connector 2CZ7 of the second drawer unit enable the coil of the second contactor 2KM to be energized and light up the sixth indicator light 2HW1 and the seventh indicator light 2HW2, the fifth normally closed contact 2KM1 of the second contactor 2KM is disconnected, the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are extinguished, and at the same time, the third main contact 2KM0 of the second contactor 2KM is closed, and the second electrical signal is connected to drive the load device 2# pump, thereby realizing the function of delaying the start of the standby 2# pump after the failure of the 1# pump, ensuring the continuity and reliability of drainage.

[0070] When the fault of pump 1# is eliminated, the first thermal overload contact 1KH1 is disconnected, and the first fault relief button 1SO on the panel of the first drawer unit 1CT is pressed, so that the coil of the second intermediate relay 1K loses power, the fifth normally open contact 1K1 is disconnected, the first normally closed contact 1K2 is closed, and the fifth indicator light 1HY goes out. At this time, the coil of the first contactor 1KM is restored to be energized and attracted, and the first indicator light 1HW1 and the second indicator light 1HW2 are re-lit, the second normally closed contact 1KM1 of the first contactor 1KM is disconnected, the third normally closed contact 1KM3 is disconnected, and the third indicator light 1HG1 and the fourth indicator light 1HG2 are extinguished. Since the third normally closed contact 1KM3 is disconnected, the coil of the second time relay 2KT in the second drawer unit 2CT loses power, the second delay contact 2KT1 of the second time relay 2KT is instantly disconnected and cuts off the coil power supply of the second contactor 2KM, the third main contact 2KM0 of the second contactor 2KM is disconnected, the second electrical signal is cut off, and the load device 2# pump stops running. At the same time, the second main contact 1KM0 of the first contactor 1KM is closed, the first electrical signal is connected, and the load device 1# pump is restarted.

[0071] Method 2: In the second drawer unit 2CT, since the second circuit breaker 2QF is closed, the connection point 2L11 is energized, and the current passes through the third fuse 2FU, the fifth normally closed contact 2KM1 of the second contactor 2KM, and the second secondary connector 2CZ1 of the second drawer unit in sequence, lighting the eighth indicator light 2HG1 and the ninth indicator light 2HG2. Switch the transfer switch SA to "2# working 1# standby gear". At this time, the sixth gate position of the transfer switch SA When the liquid level signal device sends out the second pump start signal and the third normally open contact 3K2 of the first intermediate relay 3K is closed, the current passes through the third fuse 2FU, the fourth normally closed contact 2K2 of the third intermediate relay 2K, the third normally open contact 3K2 of the first intermediate relay 3K, the second secondary connector 2CZ2 of the second drawer unit, the sixth gate of the transfer switch SA, and the third gate of the second drawer unit ⑤⑥. The coil of the second contactor 2KM is energized and attracted, and the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are lit. The fifth normally closed contact 2KM1 of the second contactor 2KM is disconnected, and the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are extinguished. At the same time, the third main contact 2KM0 of the second contactor 2KM is closed, and the second electrical signal is connected to drive the load device 2# pump. Since the sixth normally closed contact 2KM3 of the second contactor 2KM is disconnected at this time, the coil of the first time relay 1KT cannot be energized and attracted, and the 1# pump cannot be started. It should be noted that the sixth normally closed contact 2KM3 of the second contactor 2KM is led to the first drawer unit 1CT through the second secondary connectors 2CZ9 and 2CZ10 of the second drawer unit 2CT, thereby achieving electrical connection.

[0072] When the 2# pump has an overload fault, the second thermal overload contact 2KH1 of the second thermal relay 2KH is closed, and the current passes through the third fuse 2FU, the second thermal overload contact 2KH1 of the second thermal relay 2KH, and the second fault release button 2SO in sequence, so that the coil of the third intermediate relay 2K is energized and attracted, the tenth indicator light 2HY is lit, and a fault alarm signal is issued, the seventh normally open contact 2K1 of the third intermediate relay 2K is closed, the fourth normally closed contact 2K2 is disconnected, the coil of the second contactor 2KM loses power, the fifth normally closed contact 2KM1 of the second contactor is closed, the sixth normally closed contact 2KM3 is closed, the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are extinguished, and the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are lit. At the same time, the third main contact 2KM0 of the second contactor 2KM is disconnected, the second electrical signal is cut off, and the load device 2# pump is shut down.

[0073] At the same time, in the first drawer unit 1CT, the first circuit breaker 1QF is in the closing standby state, and the current passes through the second fuse 1FU, the first normally closed contact 1K2 of the second intermediate relay 1K, the second normally open contact 3K1 of the first intermediate relay 3K, the first secondary connector 1CZ3 of the first drawer unit, the third gate position ⑤⑥ of the conversion switch SA, the sixth normally closed contact 2KM3 of the second contactor 2KM, and the first secondary connector 1CZ8 of the first drawer unit, so that the coil of the first time relay 1KT is energized and attracted. The first time relay 1KT is a power-on delay type with a delay time range of 0 seconds to 60 seconds. After the preset delay time, the first delay contact 1KT1 of the first time relay 1KT is closed, and the current passes through the second fuse 1FU, the first normally closed contact of the second intermediate relay 1K, and the first normally open contact of the second intermediate relay 1K. 1K2, the second normally open contact 3K1 of the first intermediate relay 3K, the first secondary connector 1CZ3 of the first drawer unit, the third gate positions ⑤⑥ of the conversion switch SA, the secondary connector 1CZ6 of the first drawer unit, the first delay contact 1KT1 of the first time relay 1KT, and the first secondary connector 1CZ7 of the first drawer unit, so that the coil of the first contactor 1KM is energized and the first indicator light 1HW1 and the second indicator light 1HW2 are lit, the second normally closed contact 1KM1 of the first contactor 1KM is disconnected, the third indicator light 1HG1 and the fourth indicator light 1HG2 are extinguished, and at the same time, the second main contact 1KM0 of the first contactor 1KM is closed, and the first electrical signal is connected to drive the load device 1# pump, thereby realizing the function of delaying the start of the standby 1# pump after the failure of the 2# pump, thereby ensuring the continuity and reliability of drainage.

[0074] When the fault of pump 2# is eliminated, the second thermal overload contact 2KH1 is disconnected, and the second fault relief button 2SO on the panel of the second drawer unit 2CT is pressed, so that the coil of the third intermediate relay 2K loses power, the seventh normally open contact 2K1 is disconnected, the fourth normally closed contact 2K2 is closed, and the tenth indicator light 2HY goes out. At this time, the coil of the second contactor 2KM is restored to be energized and the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are re-lit, the fifth normally closed contact 2KM1 of the second contactor 2KM is disconnected, the sixth normally closed contact 2KM3 is disconnected, and the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are extinguished. Since the sixth normally closed contact 2KM3 is disconnected, the coil of the first time relay 1KT in the first drawer unit 1CT loses power, the first delay contact 1KT1 of the first time relay 1KT is instantly disconnected and cuts off the coil power of the first contactor 1KM, the second main contact 1KM0 of the first contactor 1KM is disconnected, the first electrical signal is cut off, and the load device 1# pump stops running. At the same time, the third main contact 2KM0 of the second contactor 2KM is closed, the second electrical signal is connected, and the load device 2# pump is restarted.

[0075] Mode 3: In the first drawer unit 1CT, since the first circuit breaker 1QF is closed, the connection point 1L11 is energized, and the transfer switch SA is switched to the "on-site manual gear". At this time, the first gate positions ①② of the transfer switch SA are turned on. When the first closing button 1S2 is manually pressed, the current passes through the second fuse 1FU, the first normally closed contact 1K2 of the second intermediate relay 1K, the first secondary connector 1CZ2 of the first drawer unit, the first gate positions ①② of the transfer switch SA, the first opening button 1S1, the first closing button 1S2, and the first secondary connector 1CZ5 of the first drawer unit in sequence, so that the coil of the first contactor 1KM is energized and the first indicator light 1HW1 and the second indicator light 1HW2 are lit, the second normally closed contact 1KM1 of the first contactor 1KM is disconnected, the sixth normally open contact 1KM2 is closed, the third indicator light 1HG1 and the fourth indicator light 1HG2 are extinguished, and at the same time, the second main contact 1KM0 of the first contactor 1KM is closed, and the first electrical signal is connected to drive the load device 1# pump. When the first opening button 1S1 is manually pressed, the coil of the first contactor 1KM loses power, the second normally closed contact 1KM1 of the first contactor 1KM closes, the sixth normally open contact 1KM2 opens, the third indicator light 1HG1 and the fourth indicator light 1HG2 light up, the first indicator light 1HW1 and the second indicator light 1HW2 go out, and at the same time, the second main contact 1KM0 of the first contactor 1KM opens, the first electrical signal is cut off, and the load device 1# pump stops.

[0076] When the 1# pump has an overload fault, the first thermal overload contact 1KH1 of the first thermal relay 1KH is closed, and the current passes through the second fuse 1FU, the first thermal overload contact 1KH1 of the first thermal relay 1KH, and the first fault release button 1SO in sequence, so that the coil of the second intermediate relay 1K is energized and attracted, the fifth indicator light 1HY is lit, and a fault alarm signal is issued. The fifth normally open contact 1K1 of the second intermediate relay 1K is closed, the first normally closed contact 1K2 is disconnected, the coil of the first contactor 1KM loses power, the second normally closed contact 1KM1 of the first contactor is closed, and the sixth normally open contact 1KM2 is disconnected, the first indicator light 1HW1 and the second indicator light 1HW2 are extinguished, and the third indicator light 1HG1 and the fourth indicator light 1HG2 are lit. At the same time, the second main contact 1KM0 of the first contactor 1KM is disconnected, the first electrical signal is cut off, and the load device 1# pump stops running.

[0077] When the fault of pump 1# is eliminated, the first thermal overload contact 1KH1 is disconnected, and the first fault relief button 1SO on the panel of the first drawer unit 1CT is pressed, so that the coil of the first intermediate relay 1K loses power, the fifth normally open contact 1K1 is disconnected, the first normally closed contact 1K2 is closed, and the fifth indicator light 1HY goes out. Press the first closing button 1S2 again to restart pump 1#. At this time, the coil of the first contactor 1KM is energized and attracted again, and the first indicator light 1HW1 and the second indicator light 1HW2 are re-lit, the second normally closed contact 1KM1 of the first contactor 1KM is disconnected, the sixth normally open contact 1KM2 is closed, and the third indicator light 1HG1 and the fourth indicator light 1HG2 are extinguished.

[0078] In the second drawer unit 2CT, since the second circuit breaker 2QF is closed, the connection point 2L11 is energized, and the transfer switch SA is switched to the on-site manual gear. At this time, the fourth gate position ⑦⑧ of the transfer switch SA is turned on. When the second closing button 2S2 is manually pressed, the current passes through the third fuse 2FU, the fourth normally closed contact 2K2 of the third intermediate relay 2K, the second secondary connector 2CZ2 of the second drawer unit, the fourth gate position ⑦⑧ of the transfer switch SA, the second opening button 2S1, the second closing button 2S2, and the second secondary connector 2CZ5 of the second drawer unit in sequence, so that the coil of the second contactor 2KM is energized and the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are lit, the fifth normally closed contact 2KM1 of the second contactor 2KM is disconnected, the eighth normally open contact 2KM2 is closed, the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are extinguished, and at the same time, the third main contact 2KM0 of the second contactor 2KM is closed, and the second electrical signal is connected to drive the load device 2# pump. When the second opening button 2S1 is manually pressed, the coil of the second contactor 2KM loses power, the fifth normally closed contact 2KM1 of the second contactor 2KM closes, the eighth normally open contact 2KM2 opens, the eighth indicator light 2HG1 and the ninth indicator light 2HG2 light up, the sixth indicator light 2HW1 and the seventh indicator light 2HW2 go out, and at the same time, the third main contact 2KM0 of the second contactor 2KM opens, cutting off the second electrical signal, and the load device 2# pump stops running.

[0079] When the 2# pump has an overload fault, the second thermal overload contact 2KH1 of the second thermal relay 2KH is closed, and the current passes through the third fuse 2FU, the second thermal overload contact 2KH1 of the second thermal relay 2KH, and the second fault release button 2SO in sequence, so that the coil of the third intermediate relay 2K is energized and attracted, the tenth indicator light 2HY is lit, and a fault alarm signal is issued, the seventh normally open contact 2K1 of the third intermediate relay 2K is closed, the fourth normally closed contact 2K2 is disconnected, the coil of the second contactor 2KM loses power, the fifth normally closed contact 2KM1 of the second contactor is closed and the sixth normally closed contact 2KM2 is disconnected, the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are extinguished, and the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are lit. At the same time, the third main contact 2KM0 of the second contactor 2KM is disconnected, the second electrical signal is cut off, and the load device 2# pump is shut down.

[0080] When the fault of pump 2# is eliminated, the second thermal overload contact 2KH1 is disconnected, and the second fault relief button 2SO on the panel of the second drawer unit 2CT is pressed, so that the coil of the third intermediate relay 2K loses power, the seventh normally open contact 2K1 is disconnected, the fifth normally closed contact 2K2 is closed, and the tenth indicator light 2HY goes out. Press the second closing button 2S2 again, and restart pump 2# according to the above process. At this time, the coil of the second contactor 2KM is energized again, and the sixth indicator light 2HW1 and the seventh indicator light 2HW2 are re-lit, the fifth normally closed contact 2KM1 of the second contactor 2KM is disconnected, the eighth normally open contact 2KM2 is closed, and the eighth indicator light 2HG1 and the ninth indicator light 2HG2 are extinguished.

[0081] It is worth noting that in the above-mentioned method 3, the start and stop of pump 1# does not affect the start and stop of pump 2#, and the staff can press the first closing button 1S2 and the second closing button 2S2 at the same time, so that the two submersible pumps work at the same time, speeding up the drainage speed and improving the work efficiency. In the above-mentioned methods 1, 2 and 3, the transfer switch SA, closing buttons 1S1 and 2S1, opening buttons 1S2 and 2S2, indicator lights 1HW2 and 2HW2, and indicator lights 1HG2 and 2HG2 are all installed in the on-site operation box. The first drawer unit 1CT is also equipped with a second fuse 1FU, a first fault reset button 1SO, a first indicator light 1HW1, a third indicator light 1HG1, a fifth indicator light 1HY, a second intermediate relay 1K, a first intermediate relay 3K and a first time relay 1KT; the second drawer unit 2CT is also equipped with a third fuse 2FU, a second fault reset button 2SO, a sixth indicator light 2HW1, an eighth indicator light 2HG1, a tenth indicator light 2HY, a third intermediate relay 2K and a second time relay 2KT.

[0082] The above-mentioned methods 1 and 2 are for automatically selecting the control module that needs to be switched, and method 3 is for manually selecting the control module that needs to be switched. For ease of use, it can generally be operated according to method 1 or method 2. When the on-site working conditions do not meet the automatic operation conditions, method 3 is selected for operation. When both submersible pumps need to be repaired or the sump needs to be cleaned, in order to ensure safety, switch the conversion switch SA to manual gear and disconnect the first circuit breaker QF1 and the second circuit breaker QF2, and then push the first drawer unit 1CT and the second drawer unit 2CT out of the distribution cabinet, so that there is no voltage on bus 01 and bus 02. If only a single submersible pump needs to be repaired, it is only necessary to disconnect the circuit breaker corresponding to the submersible pump and push out the drawer unit corresponding to the submersible pump at the same time, so that the control circuits of the two submersible pumps are electrically isolated, and the other submersible pump can be operated without affecting the maintenance.

[0083] See also Figure 6 , is a flowchart of a submersible pump one-in-one-standby control method provided by another embodiment of the present invention. For the sake of convenience, only the part related to this embodiment is shown, which is described in detail as follows:

[0084] A submersible pump one-in-one-standby control system comprises the following steps:

[0085] S01: The first power module 10 and the second power module 11 are used to obtain power through the mains, and output a first electrical signal and a second electrical signal respectively;

[0086] S02: using the first switch module 20 to conduct when closed and transmit a first electrical signal;

[0087] S03: using the second switch module 21 to conduct when closed and transmit a second electrical signal;

[0088] S04: using the first control module to control the first submersible pump 40 to work when receiving the first pump start signal, or to control the first submersible pump 40 to stop working when receiving the first pump stop signal;

[0089] S05: using the second control module to control the second submersible pump 41 to work when receiving the second pump start signal, or to control the second submersible pump 41 to stop working when receiving the second pump stop signal;

[0090] S06: Use the liquid level detection module 50 to monitor the liquid level in the sump, and when the liquid level reaches the pump start point, output the first pump start signal and / or the second pump start signal; or when the liquid level is lower than the pump stop point, output the first pump stop signal and / or the second pump stop signal.

[0091] Specifically, the city power is 220V AC, the first electrical signal output by the first power module 10 is supplied to the first control module 30 and the first submersible pump 40 for operation, and the second electrical signal output by the second power module 11 is supplied to the second control module 31 and the second submersible pump 41 for operation. When any control module or submersible pump is overloaded or short-circuited, the other control module and submersible pump can keep running without affecting the pumping process, which is highly safe and ensures that the equipment in the equipment room will not be soaked in water and damaged or even cause accidents.

[0092] The first switch module 20 and the second switch module 21 are implemented by the first circuit breaker 1QF and the second circuit breaker 2QF respectively. When the first circuit breaker 1QF / the second circuit breaker 2QF is turned on, the first electrical signal / the second electrical signal output by the first power module 10 / the second power module 11 is transmitted to the first control module 30 / the second control module 31 via the first circuit breaker 1QF / the second circuit breaker 2QF.

[0093] The elevation difference between the pump start point and the pump stop point is less than or equal to the height of the sump. When the liquid level in the sump reaches the pump start point, it means that there is a lot of water in the sump and it is necessary to pump the water to the inspection well in time; when the liquid level in the sump drops to the pump stop point, it means that there is less water in the sump and the water will not endanger the equipment in the equipment room, so the submersible pump does not need to work.

[0094] In summary, the embodiment of the present invention provides a submersible pump one-in-one-standby control system and method, the submersible pump one-in-one-standby control system is provided with a first power module and a second power module, the first power module supplies power to the first control module through the first switch module, and supplies power to the first submersible pump at the same time, the second power module supplies power to the second control module through the second switch module, and supplies power to the second submersible pump at the same time; therefore, when one of the control modules or one of the submersible pumps fails, the other control module or submersible pump continues to work without being affected, and no live maintenance is required, which has high safety and simple maintenance engineering. The first control module and the second control module work according to the signal output by the liquid level detection module to realize that when the liquid level in the sump is greater than the pump start point, the first submersible pump or the second submersible pump is controlled to pump out the accumulated water. The above-mentioned submersible pump one-in-one-standby control system and method adopts two power modules to supply two submersible pumps and their control modules respectively, and when any control module or submersible pump fails, it does not affect the operation of the remaining control modules and submersible pumps.

[0095] The units and modules described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. 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 present invention.

Claims

1. A submersible pump one-in-one-standby control system, characterized in that: include: A first power supply module and a second power supply module are respectively used to output a first electrical signal and a second electrical signal by taking power from the mains; A first switch module connected to the first power module and configured to conduct when closed and transmit the first electrical signal; A second switch module connected to the second power supply module and configured to conduct when closed and transmit the second electrical signal; A first control module connected to the first switch module, and used to control the first submersible pump to work when receiving a first pump start signal, or to control the first submersible pump to stop working when receiving a first pump stop signal; A second control module connected to the second switch module and the first control module, and configured to control the second submersible pump to operate upon receiving a second pump start signal, or control the second submersible pump to stop operating upon receiving a second pump stop signal; as well as A liquid level detection module connected to the first control module and the second control module, used to monitor the liquid level in the sump, and output the first pump start signal and / or the second pump start signal when the liquid level reaches the pump start point; or output the first pump stop signal and / or the second pump stop signal when the liquid level is lower than the pump stop point; The first electrical signal output by the first power module is supplied to the first control module and the first submersible pump for operation, and the second electrical signal output by the second power module is supplied to the second control module and the second submersible pump for operation; The liquid level detection module comprises: The first fuse, the first intermediate relay and the liquid level signal device; The first intermediate relay includes a first coil, a first normally open contact, a second normally open contact and a third normally open contact, and the liquid level signaler includes a high liquid level normally open contact and a low liquid level normally closed contact; The first end of the first fuse is connected to the live wire of the mains, the second end of the first fuse is connected to the first end of the low liquid level normally closed contact, the second end of the low liquid level normally closed contact, the first end of the high liquid level normally open contact and the first end of the first normally open contact are connected in common; the second end of the high liquid level normally open contact, the second end of the first normally open contact and the first end of the first coil are connected in common, and the second end of the first coil is connected to the neutral wire of the mains; The second normally open contact is connected to the first control module, and the third normally open contact is connected to the second control module; The first control module comprises: A second fuse, a second intermediate relay, a first thermal relay, a first contactor, a first time relay, a first closing button, a first opening button, a first fault clearing button, and a first gate position, a second gate position, and a third gate position of a transfer switch; The second intermediate relay includes a second coil, a fifth normally open contact and a first normally closed contact; the first thermal relay includes a first main contact and a first thermal overload contact; the first time relay includes a third coil and a first delay contact; the first contactor includes a fourth coil, a second normally closed contact, a third normally closed contact, a sixth normally open contact and a second main contact; The first end of the second fuse is connected to the first switch module, the second end of the second fuse, the first end of the fifth normally open contact, the first end of the first thermal overload contact, the first end of the first normally closed contact and the first end of the second normally closed contact are connected in common; the second end of the fifth normally open contact, the second end of the first thermal overload contact and the first end of the first fault relief button are connected in common, the second end of the first fault relief button is connected in common with the first end of the second coil, and the second end of the second coil is connected to the neutral line; The second end of the first normally closed contact, the first end of the first gate position and the first end of the second normally open contact are connected in common, the second end of the second normally open contact, the first end of the second gate position and the first end of the third gate position are connected in common, the second end of the first gate position is connected to the first end of the first opening button, the second end of the first opening button, the first end of the sixth normally open contact and the first end of the first closing button are connected in common; the second end of the first closing button, the first end of the fourth coil, the second end of the second gate position and the first end of the first delay contact are connected in common, and the second end of the fourth coil is connected to the neutral line; the second end of the first delay contact and the second end of the third gate position are connected to the second control module, the first end of the third coil is connected to the second control module, and the second end of the third coil is connected to the neutral line; The first end of the second main contact is connected to the first switch module, the second end of the second main contact is connected to the first end of the first main contact, and the second end of the first main contact is connected to the first submersible pump; The first control module also includes a first indicator light, a second indicator light, a third indicator light, a fourth indicator light and a fifth indicator light, wherein the fifth indicator light is connected to both ends of the second coil, the first indicator light is connected to both ends of the fourth coil, the first end of the second indicator light is connected to the second end of the second gate, and the second end of the second indicator light is connected to the neutral line; the first end of the third indicator light is connected to the second end of the second normally closed contact, and the second end of the third indicator light is connected to the neutral line; the fourth indicator light is connected to both ends of the third indicator light.

2. The submersible pump one-for-one-standby control system according to claim 1, characterized in that: The second control module includes: A third fuse, a third intermediate relay, a second thermal relay, a second contactor, a second time relay, a second closing button, a second opening button, a second fault relief button, and also include a fourth gate position, a fifth gate position and a sixth gate position of the transfer switch; The third intermediate relay includes a fifth coil, a seventh normally open contact and a fourth normally closed contact; the second time relay includes a sixth coil and a second delay contact; the second contactor includes a seventh coil, a fifth normally closed contact, a sixth normally closed contact, an eighth normally open contact and a third main contact; the second thermal relay includes a fourth main contact and a second thermal overload contact; The first end of the third fuse is connected to the second switch module, the second end of the third fuse, the first end of the seventh normally open contact, the first end of the second thermal overload contact, the first end of the fourth normally closed contact and the first end of the fifth normally closed contact are connected in common; the second end of the seventh normally open contact, the second end of the second thermal overload contact and the first end of the second fault relief button are connected in common, the second end of the second fault relief button is connected in common with the first end of the fifth coil, and the second end of the fifth coil is connected to the neutral line; The second end of the fourth normally closed contact, the first end of the fourth gate position and the first end of the third normally open contact are connected in common, the second end of the third normally open contact, the first end of the fifth gate position and the first end of the sixth gate position are connected in common, the second end of the fourth gate position is connected to the first end of the second opening button, the second end of the second opening button, the first end of the eighth normally open contact and the first end of the second closing button are connected in common; the second end of the second closing button, the first end of the seventh coil, the second end of the sixth gate position and the first end of the second delay contact are connected in common, and the second end of the seventh coil is connected to the neutral line; the second end of the second delay contact and the second end of the fifth gate position are connected to the first control module, the first end of the sixth coil is connected to the first control module, and the second end of the sixth coil is connected to the neutral line; The first end of the third main contact is connected to the second switch module, the second end of the third main contact is connected to the first end of the fourth main contact, and the second end of the fourth main contact is connected to the second submersible pump.

3. The one-for-one-standby submersible pump control system according to claim 1, characterized in that: The first switch module, the first contactor and the first thermal relay are all installed in a first drawer unit, and the first drawer unit includes a first secondary connector.

4. The submersible pump one-for-one-standby control system according to claim 2, characterized in that: The second switch module, the second contactor and the second thermal relay are all installed in a second drawer unit, and the second drawer unit includes a second secondary connector.

5. The submersible pump one-for-one-standby control system according to claim 1, characterized in that: The first switch module and the second switch module are implemented by a first circuit breaker and a second circuit breaker respectively.

6. The submersible pump one-for-one control system according to claim 1, characterized in that: The elevation difference between the pump start point and the pump stop point is less than or equal to the height of the sump.

7. A submersible pump one-in-one-standby control method, using the submersible pump one-in-one-standby control system according to any one of claims 1 to 6, characterized in that: include: The first power module and the second power module are used to draw power from the mains, and output a first electrical signal and a second electrical signal respectively; The first switch module is used to conduct when closed and transmit the first electrical signal; Adopting the second switch module to conduct when closed and transmit the second electrical signal; The first control module controls the first submersible pump to work when receiving the first pump start signal, or controls the first submersible pump to stop working when receiving the first pump stop signal; The second control module controls the second submersible pump to work when receiving the second pump start signal, or controls the second submersible pump to stop working when receiving the second pump stop signal; A liquid level detection module is used to monitor the liquid level in the sump, and when the liquid level reaches the pump start point, the first pump start signal and / or the second pump start signal is output; or when the liquid level is lower than the pump stop point, the first pump stop signal and / or the second pump stop signal is output; The first electrical signal output by the first power module is supplied to the first control module and the first submersible pump for operation, and the second electrical signal output by the second power module is supplied to the second control module and the second submersible pump for operation.

Images