Title:
ENCLOSED HYDRAULIC ROCK DRILL WORKING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/120128
Kind Code:
A1
Abstract:
An enclosed hydraulic rock drill working system, comprising a hydraulic rock drill (18) and a water tank (2); the water tank (2) supplies water to the hydraulic rock drill (18) by means of a high pressure water supply system, and returns water from the hydraulic rock drill (18) by means of a water return system. The system may directly use tap water, thus achieving a closed loop between high pressure water and low pressure water, which may save energy by more than 90% compared to a pneumatic rock drill, and produce less noise than a pneumatic rock drill system, the noise of a pneumatic rock drill on a mining working surface being 128.5 dB(A) on average, while the noise of the hydraulic rock drill is 100.5 dB(A), and thus noise may be reduced by more than 20%.
Inventors:
LI YONGSHENG (CN)
WANG WEILIN (CN)
YANG QI (CN)
ZHANG FENGQIN (CN)
WANG QIUJING (CN)
WANG WEILIN (CN)
YANG QI (CN)
ZHANG FENGQIN (CN)
WANG QIUJING (CN)
Application Number:
PCT/CN2018/120808
Publication Date:
June 27, 2019
Filing Date:
December 13, 2018
Export Citation:
Assignee:
SHANDONG TIANRUI HEAVY IND CO LTD (CN)
International Classes:
E21B4/14; E21B1/26; F15B9/08; F15B13/042
Foreign References:
| CN204532051U | 2015-08-05 | |||
| CN105114373A | 2015-12-02 | |||
| CN104675774A | 2015-06-03 | |||
| CN201560706U | 2010-08-25 | |||
| US3916768A | 1975-11-04 | |||
| US4369848A | 1983-01-25 | |||
| US4430926A | 1984-02-14 | |||
| JP2018012944A | 2018-01-25 | |||
| CN107893626A | 2018-04-10 | |||
| CN207620704U | 2018-07-17 | |||
| CN107143537A | 2017-09-08 | |||
| US20020070368A1 | 2002-06-13 |
Attorney, Agent or Firm:
BOXIN CHINA INTELLECTUAL PROPERTY (CN)
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