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Title:
ADVANCE AND RETREAT AUTOMATIC CONTROL METHOD BASED ON HYDRAULIC SENSING CONVERSION AND ADVANCE AND RETREAT AUTOMATIC CONTROL SYSTEM BASED ON HYDRAULIC SENSING CONVERSION
Document Type and Number:
WIPO Patent Application WO/2019/001401
Kind Code:
A1
Abstract:
An advance and retreat automatic control method based on hydraulic sensing conversion and an advance and retreat automatic control system based on hydraulic sensing conversion. The advance and retreat automatic control system based on hydraulic sensing conversion is provided with an automatic advance and retreat device (3) based on hydraulic sensing conversion. The advance and retreat automatic control system based on hydraulic sensing conversion also comprises a motor (14), an oil cylinder (9), and/or a motor (20). The automatic advance and retreat device (3) based on hydraulic sensing conversion cooperates with a mining motor (6) and a walking motor (1) to form a motor automatic advance and retreat mechanism based on hydraulic sensing conversion. When the mining motor (6) encountered a large resistance force, the pressure on the mining motor (6) is instantaneously increased and exceeds a set pressure value, hydraulic oil enters a hydraulically-controlled change valve (2) and pushes a valve rod to make the walking motor (1) reverse and retreat, the super-high pressure state of the mining motor (6) is released to restore to a normal pressure value to make reciprocating impacts, the valve rod of the hydraulically-controlled change valve (2) is reset, and the walking motor (1) normally turns forwards to walk. The continuous and stable operation of the advance and retreat automatic control system based on hydraulic sensing conversion is ensured, and the continuous work of automatic advance and retreat is implemented, thereby improving the working efficiency.

Inventors:
LIU SUHUA (CN)
Application Number:
PCT/CN2018/092753
Publication Date:
January 03, 2019
Filing Date:
June 26, 2018
Export Citation:
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Assignee:
LIU SUHUA (CN)
International Classes:
E21B1/00; F15B11/16
Foreign References:
CN105156018A2015-12-16
CN205977212U2017-02-22
CN1573126A2005-02-02
CN104613033A2015-05-13
CN204739025U2015-11-04
JP2008275100A2008-11-13
Other References:
See also references of EP 3647530A4
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