CN-224232124-U - Liquid level control system for automatic drainage

CN224232124UCN 224232124 UCN224232124 UCN 224232124UCN-224232124-U

Abstract

The utility model provides a liquid level control system for automatic drainage, and belongs to the technical field of circuits. A liquid level control system for automatic drainage comprises a three-phase alternating current power supply, a main switch QS, a fuse FU, a thermal relay FR1, a contactor KM, a water pump and a control loop for controlling the starting and stopping of a three-phase motor M of the water pump, wherein the three-phase motor M is connected with the three-phase alternating current power supply through the main switch QS, a main contact of the contactor KM and the fuse FU and used for driving the water pump to drain water, the control loop comprises a normally closed high-water-level floating ball switch, a normally open low-water-level floating ball switch, a starting button SB2, a stopping button SB1 and a control relay RF, the stopping button SB1, the normally open low-water-level floating ball switch, the normally closed high-water-level floating ball switch and coils of the contactor KM are sequentially connected in series, and the starting button SB2 is connected with the normally open low-water-level floating ball switch in parallel.

Inventors

XIA YAN
XIA YANG

Assignees

浙江浦森新材料科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250804

Claims (6)

1. A fluid level control system for automatic draining, comprising: A three-phase alternating current power supply, a main switch QS, a fuse FU, a thermal relay FR1, a contactor KM, a water pump and a control loop for controlling the start and stop of a three-phase motor M of the water pump, The three-phase motor M is connected with the three-phase alternating current power supply through a main switch QS, a main contact of a contactor KM and a fuse FU and is used for driving a water pump to drain water; The control loop comprises a normally closed high water level float switch, a normally open low water level float switch, a start button SB2, a stop button SB1 and a control relay RF; The coils of the control relay RF, the stop button SB1, the normally open low water level float switch, the normally closed high water level float switch and the contactor KM are sequentially connected in series; the starting button SB2 is connected with a normally open low water level float switch in parallel; when the water level exceeds the normally open low water level float switch, the normally open low water level float switch is closed, the control loop is connected, the main contact of the contactor KM is electrified and closed, and the motor operates to enable the water pump to start draining; When the water level is lower than the normally open low water level float switch, the normally open low water level float switch is disconnected, the control loop is cut off, the main contact of the contactor KM is released, and the motor stops running.
2. The liquid level control system for automatic drainage according to claim 1, wherein the normally open low water level float switch is connected in parallel with an auxiliary contact of the contactor KM, and the auxiliary contact of the contactor KM is used for connecting an indicator lamp for reminding whether to be in an energized state.
3. The liquid level control system for automatic drainage according to claim 1, wherein the normally closed high water level float switch is connected in series in the control circuit and is used to shut off the control circuit to stop the motor at a high water level.
4. The liquid level control system for automatic drainage according to claim 1, wherein the control relay RF has a function of cutting off a control circuit when the motor is overloaded.
5. The liquid level control system for automatic drainage according to claim 1, wherein the start button SB2 is a normally open button, the stop button SB1 is a normally closed button, the start button SB2 is capable of forcibly starting the control circuit when the normally open low water level float switch is not closed, and the stop button SB1 is capable of forcibly switching off after the control circuit is energized.
6. The liquid level control system for automatic drainage according to claim 1, wherein the water pump is a submersible pump.

Description

Liquid level control system for automatic drainage Technical Field The utility model belongs to the technical field of circuits, and particularly relates to a liquid level control system for automatic drainage. Background In the existing production process, sewage often overflows to pollute the surrounding environment, a liquid level control system is required to be arranged urgently, and when the liquid level exceeds a preset liquid level, the internal sewage is automatically discharged. Disclosure of Invention The utility model aims at solving the problems in the prior art and provides a liquid level control system for automatic drainage, which has the characteristic of automatic drainage exceeding a preset liquid level. The aim of the utility model can be achieved by the following technical scheme: A liquid level control system for automatic draining, comprising: A three-phase alternating current power supply, a main switch QS, a fuse FU, a thermal relay FR1, a contactor KM, a water pump and a control loop for controlling the start and stop of a three-phase motor M of the water pump, The three-phase motor M is connected with the three-phase alternating current power supply through a main switch QS, a main contact of a contactor KM and a fuse FU and is used for driving a water pump to drain water; The control loop comprises a normally closed high water level float switch, a normally open low water level float switch, a start button SB2, a stop button SB1 and a control relay RF; The coils of the control relay RF, the stop button SB1, the normally open low water level float switch, the normally closed high water level float switch and the contactor KM are sequentially connected in series; the starting button SB2 is connected with a normally open low water level float switch in parallel; when the water level exceeds the normally open low water level float switch, the normally open low water level float switch is closed, the control loop is connected, the main contact of the contactor KM is electrified and closed, and the motor operates to enable the water pump to start draining; When the water level is lower than the normally open low water level float switch, the normally open low water level float switch is disconnected, the control loop is cut off, the main contact of the contactor KM is released, and the motor stops running. In the above liquid level control system for automatic drainage, the normally open low water level float switch is connected in parallel with the auxiliary contact of the contactor KM, and the auxiliary contact of the contactor KM is used for connecting an indicator lamp for reminding whether the contactor KM is in an energized state. In the above-mentioned liquid level control system for automatic drainage, the normally closed high water level float switch is connected in series in the control circuit and is used to shut off the control circuit to stop the motor at the time of high water level. In the above-described liquid level control system for automatic drainage, the control relay RF has a function of shutting off the control circuit when the motor is overloaded. In the above liquid level control system for automatic drainage, the start button SB2 is a normally open button, the stop button SB1 is a normally closed button, the start button SB2 can forcedly start the control circuit when the normally open low water level float switch is not closed, and the stop button SB1 can forcedly cut off the power after the control circuit is electrified. In the liquid level control system for automatic drainage, the water pump is a submersible pump. Compared with the prior art, the application has the following advantages: Drawings Fig. 1 is a circuit diagram in the present application. Detailed Description The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. As shown in fig. 1, the liquid level control system for automatic drainage comprises a three-phase alternating current power supply, a main switch QS, a fuse FU, a thermal relay FR1, a contactor KM, a water pump and a control loop for controlling the starting and stopping of a three-phase motor M of the water pump, wherein the three-phase motor M is connected with the three-phase alternating current power supply through the main switch QS, a main contact of the contactor KM and the fuse FU and used for driving the water pump to drain water, the control loop comprises a normally closed high-water-level float switch, a normally open low-water-level float switch, a start button SB2, a stop button SB1 and a control relay RF, the control loop