Protection device and control method for a booster pump in a shield machine cleaning system

Abstract

The invention discloses a protection device for a booster pump in a shield tunneling machine cleaning system and a control method thereof. The protection device comprises an overflow valve used for adjusting the water outlet pressure of the booster pump, a flow detection switch used for detecting the water flow of a main water path passage in real time, a pressure sensor used for detecting the pressure of water in the main water path passage in real time, and a controller with a timer module, wherein the controller is used for receiving the data detected by the flow detection switch and the pressure sensor in real time and controlling the booster pump and the overflow valve to work in cooperation with a timer for timing according to the detected data. The purpose is to protect the booster pump and prevent the situation that the booster pump works in a pressure-out mode for a long time and accordingly is damaged due to heating, and the function of saving energy is also realized.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to a protection device for a booster pump in a cleaning system of a shield machine and a control method thereof. Background technique [0002] Shield machine is often used in the excavation of subway tunnels, submarine tunnels, highway tunnels, etc. It is a kind of high degree of automation, manpower saving, fast construction speed, one-time hole formation, not affected by climate, and can control land subsidence during excavation. Tunnel construction machinery that does not affect ground traffic during excavation. [0003] The shield machine has internal circulating water and external circulating water, and the external circulating water is mainly used to cool the internal circulating water and hydraulic oil tank. The external circulating water is supplied by the water tower outside the tunnel. The water in the water tower is sent to the water pipe reel on the last trailer...

AI Technical Summary

Problems solved by technology

When the water cleaning system is not working, the following two steps need to be carried out: 1. Turn off the control command of water spraying. The control unit is often set in the touch panel of the upper computer in the control room, and is used to turn off the power of the corresponding branch water channel. 2. The staff manually close the control button of the booster pump; but in actual work, the staff often ignore step 2 and forget to turn off the booster pump, which will easily cause the booster pump to run under pressure for a long time, resulting in booster The pump is damaged by heat, and at the same time increases the power loss and wastes energy

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