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Title:
MECHANICAL CONSTANT-RESISTANCE SINGLE PROP CONTINUOUS PROP LIFTING PRE-TIGHTENING DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2019/166025
Kind Code:
A1
Abstract:
A mechanical constant-resistance single prop continuous prop lifting pre-tightening device, structurally composed of a continuous prop lifting device (17), a pressurizing system, an oil supply line and a monitoring unit. The continuous prop lifting device (17) is a core component, comprising a hydraulic cylinder (1), a prop barrel clamping sleeve ring (7) and a prop rod clamping sleeve ring (8). The prop rod clamping sleeve ring (8) is fixedly connected with a piston rod (9) of the hydraulic cylinder (1) by means of a cylinder head seat (15), and the prop barrel clamping sleeve ring (7) is fixedly connected with a cylinder body of the hydraulic cylinder (1). With continuous pressurization of the pressurizing system, a cohesion occurs between the continuous prop lifting device and a prop rod, so that the prop rod of a single prop is lifted up to come into contact with a top plate and provide a pre-tightening force. Further disclosed is a mechanical constant-resistance single prop continuous prop lifting pre-tightening method. According to the pre-tightening device and method, the piston rod of the continuous prop lifting device is controlled to perform extension, standstill and retraction by adjusting the pressurizing system. The device is simple in structure and easy to operate, can implement a fast continuous prop lifting of the single prop and apply a high pre-tightening force, so that a high constant working resistance is provided for top plate control, and supporting safety is thus ensured.

Inventors:
CHEN YANLONG (CN)
PU HAI (CN)
JU FENG (CN)
ZHANG KAI (CN)
WU YU (CN)
LI MING (CN)
LIU JIANGFENG (CN)
WU PENG (CN)
FAN JINCHENG (CN)
FENG ZHIWEI (CN)
Application Number:
PCT/CN2019/077809
Publication Date:
September 06, 2019
Filing Date:
March 12, 2019
Export Citation:
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Assignee:
UNIV CHINA MINING (CN)
International Classes:
B66F3/46; E21D15/59
Foreign References:
CN108425693A2018-08-21
CN1640805A2005-07-20
CN107161903A2017-09-15
CN105084244A2015-11-25
CN2034966U1989-03-29
CN2424185Y2001-03-21
CN101446214A2009-06-03
CN201212011Y2009-03-25
US4915281A1990-04-10
Attorney, Agent or Firm:
NANJING SUGAO PATENT AND TRADEMARK FIRM (ORDINARY PARTNERSHIP) (CN)
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