Automatic drainage system for shallow accumulated water of cable trench

Abstract

The invention relates to an automatic drainage system for shallow accumulated water of a cable trench. The system comprises a liquid level switch, a control circuit, a direct-current power supply, a water pump M and an alternating-current power supply. The water pump M is arranged in the cable trench and connected with the alternating-current power supply through the control circuit to form a water pump main loop. The direct-current power supply provides direct-current power for the liquid level switch and the control circuit. The liquid level switch is arranged in the cable trench and used for monitoring the liquid level of the shallow accumulated water of the cable trench, and the height between the liquid level switch and the bottom face of the cable trench is equal to the to-be-controlled water level. When the liquid level in the cable trench reaches the position of the liquid level switch, the liquid level switch sends a signal to the control circuit, and the control circuit controls the water pump M. According to the system, the shallow accumulated water of the cable trench can be effectively discharged. The invention further provides the novel control circuit for performingstarting during the high water level of the water pump and performing stopping during the lower water level of the water pump.

Description

technical field [0001] The invention relates to the field of drainage, more specifically, to an automatic drainage system for shallow water accumulation in cable trenches. Background technique [0002] During heavy rains, some substations and cable trenches in district and county bureau power distribution rooms will flood due to flooding, seriously threatening the safe operation of equipment. The water in many cable trenches is relatively shallow or water collection wells were not installed during construction (many power distribution rooms are located on the first floor of the basement. wells), resulting in difficulty in draining shallow water and easily burning pumps. [0003] For the treatment of shallow water in the cable trench, the main problem lies in the use of water pumps and liquid level switches. For water pumps, ordinary sewage pumps or ordinary self-priming pumps are generally used for drainage. For the liquid level switch, in order to meet the more precise c...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an automatic drainage system for shallow water in cable trenches in order to overcome the defect of difficult drainage of shallow water in cable trenches described in the prior art

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