Telescopic machine tail self-adaptive adjustment electro-hydraulic composite control system and method

Abstract

The present invention relates to the technical field of equipment design and manufacture of coal mine underground fully mechanized mining face, in particular to a telescopic machine tail self-adaptiveadjustment electro-hydraulic composite control system and method. A piston rod of the tensioning cylinder I and a piston rod of the tensioning cylinder II are connected with a telescopic machine tailframe, a travel sensor I and a travel sensor II are respectively arranged inside the piston rod of the tensioning cylinder I and inside the piston rod of the tensioning cylinder II, the travel sensorI and the travel sensor II are respectively connected with a PLC calculation control center through a travel signal transmission line I and a travel signal transmission line II, the tensioning cylinder I and the tensioning cylinder II are connected with a double-hydraulic-control one-way valve, a pressure sensor I and a pressure sensor II are respectively arranged on a pipeline which is connectedwith the tensioning cylinder I and the tensioning cylinder II and the double-hydraulic-control one-way valve, and the pressure sensor I and the pressure sensor II are respectively connected with thePLC calculation control center through a pressure signal transmission line I and a pressure signal transmission line II. The system and method is safe and reliable, has a simple mechanism, and adoptsmicrocomputer control and information feedback.

Description

technical field [0001] The invention belongs to the technical field of equipment design and manufacture of underground fully mechanized mining face in coal mines, and in particular relates to an electro-hydraulic compound control system and method for self-adaptive adjustment of a retractable machine tail. Background technique [0002] Conveyor is one of the key equipment in fully mechanized coal mining face. Its main components include nose frame, chute, scraper chain, telescopic tail frame and transmission device, etc. The coal is transported by chains installed with scrapers. The main function of the conveyor is that the shearer rides on the conveyor as the running track of the shearer and runs reciprocatingly; the second is to transport the coal cut by the shearer; the third is to serve as the fulcrum for the push-pull movement of the hydraulic support. [0003] Factors such as the reciprocating speed of the shearer on the conveyor, the running distance, the movement of...

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Problems solved by technology

[0005] In order to solve the problem that the tension force of the chain is always in the optimal tension state, make the chain mesh with the sprocket normally, prevent the chain from being too loose or too tight, and ensure the normal, safe and reliable operation of the conveyor, the invention provides a retractable tail automatic Adaptive adjustment electro-hydraulic compound control system and method

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