Underground excavation trolley drilling depth control method and system and underground excavation trolley drilling device

Abstract

The invention relates to underground excavation trolley drilling depth control method and system and an underground excavation trolley drilling device. The control method comprises the following steps: detecting displacement of a hydraulic cylinder (4) in an underground excavation trolley; judging resistance received by a rock drill (5) during drilling according to the displacement of the hydraulic cylinder (4); regulating control current applied to a proportioning valve block (2) according to the resistance received by the rock drill (5) during drilling, so as to adjust pressure of the hydraulic cylinder (4) and/or drilling speed of the rock drill (5). The control method provided by the invention has the advantages that power of the whole drilling device can be automatically controlled in a drilling process, so as to be matched with resistance variation in the drilling process, drilling speed is more uniform, the phenomenon that a drilling tool is jammed due to a drill bit is avoided, service lives of the drill bit and a drill rod are prolonged while drilling efficiency is guaranteed, and the drilling device is avoided from breaking down in a working process.

Description

technical field [0001] The invention relates to the technical field of underground excavation trolleys, in particular to a method and system for controlling the drilling depth of an underground excavation trolley and an underground excavation trolley. Background technique [0002] The underground excavation trolley is a special equipment for underground space specially developed for the construction method of underground excavation in subway tunnel engineering. Anchor, auxiliary support, auxiliary wet spraying and other functions. Due to its low cost, flexible and changeable structure, underground excavation construction has little impact on ground buildings, roads and underground pipelines, and has the advantages of less land occupation, less disturbance to residents, and less pollution of urban environment. It is widely used in the field of subway construction. play an extremely important role. [0003] The traditional drilling depth control technology is a hydraulic con...

AI Technical Summary

Problems solved by technology

This kind of control system, when encountering complex construction conditions, it is difficult to achieve better control effect

[0005] The existing technical solution is to realize the switch of the rock drill according to the data transmitted by the length sensor on the oil cylinder read by the controller. Although the automatic control of the drilling depth can be realized in this way, the power matching between the hydraulic cylinder and the rock drill cannot be realized during the drilling process. It will lead to fast or slow drilling progress, drill sticking, etc.

Therefore, in the existing scheme, during the control drilling process, there will be phenomena such as overwork of the anchor rod, drill bit sticking, etc., which will affect the life of the anchor rod

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