Liquid level interlocking rainwater pump control system

Abstract

The utility model provides a liquid level interlocking rain water pump control system which comprises a first rain water pump and a second rain water pump, the electrical output end of the first rain water pump is electrically connected with a first thermal relay, the electrical output end of the first thermal relay is electrically connected with a first alternating current contactor, and the electrical output end of the second thermal relay is electrically connected with a second alternating current contactor. The electrical output end of the first alternating current contactor is electrically connected with a second instruction switch, and the electrical output end of the second instruction switch is electrically connected with a second change-over switch. The liquid level interlocking rainwater pump control system solves the problems that when the liquid level interlocking rainwater pump control system is used, due to the fact that the number of devices is increased, cost is increased, meanwhile, part of rainwater pumps are in a start-stop state for a long time, service life of the rainwater pumps is shortened, and when part of rainwater pumps are used, liquid level electric leakage possibly occurs outdoors for a long time. And normal use of the rainwater pump is influenced.

Description

Technical Field

[0001] The utility model relates to the field of rainwater pumps, in particular to a liquid level interlock rainwater pump control system. Background Technique

[0002] A rainwater pump is a pump specifically designed to handle rainwater. It uses the action of centrifugal force to generate negative pressure, causing the water flow to have a centripetal acceleration, thereby achieving the purpose of conveying the water flow outward. Its working principle is similar to that of a general centrifugal pump. During operation, the impeller inside the pump rotates rapidly, generating centrifugal force, causing the water flow to be sucked into the pump body and flow along the blades of the impeller. As the water flow speed increases, its pressure gradually decreases, thus forming a negative pressure area inside the pump body. This negative pressure causes the external water flow to be sucked into the pump body and is pushed towards the water outlet along with the rotation of the impeller, ultimately realizing the discharge of rainwater.

[0003] Currently, rainwater pumps are widely used. Considering the on-site operation situation, a scheme of using one pump and having one standby pump is adopted to ensure its operation reliability. However, during use, due to the increase in the number of devices, the cost will increase. At the same time, some rainwater pumps are in a start-stop state for a long time, which will reduce their service life. Additionally, when some rainwater pumps are in use, they may experience liquid level leakage outdoors for a long time, affecting the normal use of the rainwater pumps.

[0004] Therefore, it is necessary to provide a new liquid level interlock rainwater pump control system to solve the above technical problems. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a liquid level interlock rainwater pump control system in which the rainwater pump can select the rainwater pump and the manual / automatic control mode through a conversion button, and uses high and low contact float liquid levels and a safety voltage, which is beneficial to reducing the reliability guarantee of personnel operation, improving the service life and maintenance of the equipment, and the safety of operators.

[0006] The liquid level interlock rainwater pump control system provided by the utility model includes a first rainwater pump and a second rainwater pump. The electrical output end of the first rainwater pump is electrically connected to a first thermal relay. The electrical output end of the first thermal relay is electrically connected to a first AC contactor. The electrical output end of the first AC contactor is electrically connected to a second command switch. The electrical output end of the second command switch is electrically connected to a second conversion switch. The electrical output end of the second conversion switch is electrically connected to a first conversion switch. The electrical output end of the first conversion switch is electrically connected to a first command switch. The electrical output end of the first command switch is electrically connected to a fuse.

[0007] As a liquid level interlock rain pump control system provided by the present utility model, preferably, the electrical output end of the first AC contactor is electrically connected to a circuit breaker, and the electrical output end of the second rain pump is electrically connected to a second thermal relay.

[0008] As a liquid level interlock rain pump control system provided by the present utility model, preferably, the electrical output end of the second thermal relay is electrically connected to a second AC contactor, and the electrical output end of the second AC contactor is electrically connected to the electrical input end of the circuit breaker.

[0009] As a liquid level interlock rain pump control system provided by the present utility model, preferably, the electrical output end of the second AC contactor is electrically connected to the electrical output end of a third command switch which is electrically connected to a first intermediate relay, and the electrical output end of the second AC contactor is electrically connected to a second intermediate relay.

[0010] As a liquid level interlock rain pump control system provided by the present utility model, preferably, the electrical output end of the second changeover switch is electrically connected to a high liquid level contact, and the electrical output ends of the first AC contactor and the second AC contactor are both electrically connected to a low liquid level contact.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] In this liquid level interlock rain pump control system, by setting a first changeover switch and a second changeover switch, when using the rain pump, in the initial state, the second changeover switch is in the middle position, and the first rain pump or the second rain pump can be selected to the left or right according to needs. The start conversion button and the first changeover switch are in the middle position, and manual or automatic state can be selected to the left or right according to needs. When in the automatic state, any one of the pumps is selected. When the liquid level is higher than the high level, the corresponding motor is started. When the liquid level is lower than the lowest point of the float liquid level, the motor stops. When one motor is running, the other motor does not start. This solves the problems that in its use, due to the increase in the number of devices, the cost will increase, and at the same time, some rain pumps are in the start-stop state for a long time, which will reduce their service life. At the same time, when some rain pumps are in use, there may be a situation of liquid level leakage outdoors for a long time, affecting the normal use of the rain pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the electrical schematic diagram of a preferred embodiment of the liquid level interlock rain pump control system provided by the present utility model;

[0014] Figure 2 is Figure 1 the electrical connection schematic diagram of the first command switch, the second command switch, the first changeover switch, the second changeover switch and the fuse shown;

[0015] Figure 3 For Figure 1 the electrical connection schematic diagram of the high liquid level contact and the low liquid level contact shown

[0016] Reference numerals in the figure: 1, the first rainwater pump; 2, the second rainwater pump; 3, the first thermal relay; 4, the first AC contactor; 5, the circuit breaker; 6, the second thermal relay; 7, the second AC contactor; 8, the second command switch; 9, the second changeover switch; 10, the first changeover switch; 11, the first command switch; 12, the fuse; 13, the third command switch; 14, the first intermediate relay; 15, the second intermediate relay; 16, the high liquid level contact; 17, the low liquid level contact Specific embodiments

[0017] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments

[0018] Please refer to Figure 1 、 Figure 2 and Figure 3 wherein Figure 1 is the electrical schematic diagram of a preferred embodiment of the liquid level interlock rainwater pump control system provided by the present utility model Figure 2 For Figure 1 the electrical connection schematic diagram of the first command switch, the second command switch, the first changeover switch, the second changeover switch and the fuse shown Figure 3 For Figure 1 the electrical connection schematic diagram of the high liquid level contact and the low liquid level contact shown. A liquid level interlock rainwater pump control system includes a first rainwater pump 1 and a second rainwater pump 2. The electrical output end of the first rainwater pump 1 is electrically connected to a first thermal relay 3. The electrical output end of the first thermal relay 3 is electrically connected to a first AC contactor 4. The electrical output end of the first AC contactor 4 is electrically connected to a second command switch 8. The electrical output end of the second command switch 8 is electrically connected to a second changeover switch 9. The electrical output end of the second changeover switch 9 is electrically connected to a first changeover switch 10. The electrical output end of the first changeover switch 10 is electrically connected to a first command switch 11. The electrical output end of the first command switch 11 is electrically connected to a fuse 12

[0019] In the specific implementation process, as shown in Figure 2 and Figure 3 the electrical output end of the first AC contactor 4 is electrically connected to a circuit breaker 5, and the electrical output end of the second rainwater pump 2 is electrically connected to a second thermal relay 6

[0020] The electrical output end of the second thermal relay 6 is electrically connected to a second AC contactor 7, and the electrical output end of the second AC contactor 7 is electrically connected to the electrical input end of the circuit breaker 5

[0021] The electrical output terminal of the second AC contactor 7 is electrically connected to the electrical output terminal of the third command switch 13 which is electrically connected to the first intermediate relay 14, and the electrical output terminal of the second AC contactor 7 is electrically connected to the second intermediate relay 15.

[0022] The electrical output terminal of the second changeover switch 9 is electrically connected to the high liquid level contact 16, and the electrical output terminals of the first AC contactor 4 and the second AC contactor 7 are both electrically connected to the low liquid level contact 17.

[0023] It should be noted that: by setting the circuit breaker 5 in the circuit, the power supply can be quickly cut off in case of abnormal current or short circuit, effectively preventing safety accidents such as equipment damage and fire. At the same time, by setting the second thermal relay 6, the overload protection ability of the overall system can be enhanced. When the rainwater pump or other related equipment overheats due to overload, the thermal relay can automatically cut off the circuit to protect the equipment from damage. By setting multiple relays and command switches, the system can be flexibly adjusted and controlled according to different operating conditions and requirements. By setting the first AC contactor 4 and the second AC contactor 7, the stability and reliability of the circuit during connection and disconnection are ensured.

[0024] The working principle of a liquid level interlock rainwater pump control system provided by the present utility model is as follows:

[0025] When the staff needs to use the rainwater pump, first, the first transfer switch 10 should be in the middle position at the beginning. Turning it to the left belongs to manually starting and stopping the motor, and turning it to the right belongs to automatically starting and stopping the motor by the liquid level float. Second, when the second transfer switch 9 is turned to the left, the first rainwater pump 1 is selected; when turned to the right, the second rainwater pump 2 is selected; when turned to the middle, it means no selection and cannot be operated. When the first transfer switch 10 is turned to the left and the second transfer switch 9 is turned to the left, only the second command switch 8 can be clicked. The first AC contactor 4 is energized to start the first rainwater pump 1, and the first transfer switch 10 is clicked to disconnect the first AC contactor 4 to stop the first rainwater pump 1. When the first transfer switch 10 is turned to the left and the second transfer switch 9 is turned to the right, only the third command switch 13 can be clicked. The second AC contactor 7 is energized to start the second rainwater pump 2, and the first command switch 11 is clicked to disconnect the second AC contactor 7 to stop the first rainwater pump 1. When the first transfer switch 10 is turned to the right and the second transfer switch 9 is turned to the left, when the liquid level reaches the high liquid level contact 16 and the position is closed, KA1 is energized, and the first AC contactor 4 is energized to start the first rainwater pump 1. When the liquid level is between the high liquid level contact 16 and the low liquid level contact 17, the first command switch 11 is clicked, the first AC contactor 4 is disconnected, and KA1 is disconnected, and the first rainwater pump 1 stops. When the liquid level is lower than the low liquid level contact 17 position, KA1 is disconnected, the first AC contactor 4 is disconnected, and the first rainwater pump 1 stops. When the first transfer switch 10 is turned to the right and the second transfer switch 9 is turned to the right, when the liquid level reaches the high liquid level contact 16 and the position is closed, KA2 is energized, and the second AC contactor 7 is energized to start the second rainwater pump 2. When the liquid level is between the high liquid level contact 16 and the low liquid level contact 17, the first command switch 11 is clicked, KM2 is disconnected, and KA2 is disconnected, and the second rainwater pump 2 stops. When the liquid level is lower than the low liquid level contact 17 position, KA2 is disconnected, the second AC contactor 7 is disconnected, and the second rainwater pump 2 stops.

[0026] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A liquid level interlock rainwater pump control system, characterized in that, It includes a first rainwater pump (1) and a second rainwater pump (2). The electrical output end of the first rainwater pump (1) is electrically connected to a first thermal relay (3). The electrical output end of the first thermal relay (3) is electrically connected to a first AC contactor (4). The electrical output end of the first AC contactor (4) is electrically connected to a second command switch (8). The electrical output end of the second command switch (8) is electrically connected to a second changeover switch (9). The electrical output end of the second changeover switch (9) is electrically connected to a first changeover switch (10). The electrical output end of the first changeover switch (10) is electrically connected to a first command switch (11). The electrical output end of the first command switch (11) is electrically connected to a fuse (12).

2. The liquid level interlock rainwater pump control system according to claim 1, wherein The electrical output end of the first AC contactor (4) is electrically connected to a circuit breaker (5). The electrical output end of the second rainwater pump (2) is electrically connected to a second thermal relay (6).

3. The liquid level interlock rainwater pump control system according to claim 2, wherein, The electrical output end of the second thermal relay (6) is electrically connected to a second AC contactor (7). The electrical output end of the second AC contactor (7) is electrically connected to the electrical input end of the circuit breaker (5).

4. The liquid level interlock rainwater pump control system according to claim 3, wherein, The electrical output end of the second AC contactor (7) is electrically connected to the electrical output end of a third command switch (13) which is electrically connected to a first intermediate relay (14). The electrical output end of the second AC contactor (7) is electrically connected to a second intermediate relay (15).

5. The liquid level interlock rainwater pump control system according to claim 3, wherein The electrical output end of the second changeover switch (9) is electrically connected to a high-level contact (16). The electrical output ends of both the first AC contactor (4) and the second AC contactor (7) are electrically connected to a low-level contact (17).

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