CONTROLLABLE PRESSURE INJECTION APPARATUS BASED ON HYDRAULIC ACCUMULATOR AND METHOD THEREFOR

WIPO Patent Application WO/2019/205472

A1

Provided are a controllable pressure jetting apparatus based on a hydraulic energy accumulator and a jetting method. The jetting apparatus comprises a pressure storage system, a pressure holding system, a sealing system and an injection system. The pressure storage system comprises a front half (4-2) of a pressure cylinder, an annular piston (5) and a middle connection body (7). The pressure holding system comprises an energy accumulator (2), a rear half (4-1) of a pressure cylinder, and a rear end cover (1). The sealing system comprises a hydraulic propulsion cylinder (8), a propulsion piston (9), a front end cover (10), a sealing tube (12), a thickened end part (14) and an expanding rubber tube (13). The jetting system comprises a hydraulic valve body (6) and a jetting gun tube (11). The jetting apparatus can quickly apply pressure to the bottom of a drilling hole in a hydraulic manner, so that rock is broken under tension, thereby improving the excavating efficiency of hard rock.

LIU SONGYONG (CN)
ZHU ZHENCAI (CN)
WANG HAODONG (CN)
SHEN GANG (CN)
JIANG HONGXIANG (CN)
CUI XINXIA (CN)
LI HONGSHENG (CN)
LI WEI (CN)
ZHANG XIN (CN)

PCT/CN2018/106902

October 31, 2019

September 21, 2018

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UNIV CHINA MINING (CN)
XUZHOU ZHIRUN MINING EQUIPMENT SCIENCE AND TECH CO LTD (CN)

E21C37/08

CN201062516Y	2008-05-21
CN104763712A	2015-07-08
CN2823557Y	2006-10-04
CN203547752U	2014-04-16
CN203655296U	2014-06-18
US4363451A	1982-12-14
US4230019A	1980-10-28

NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)

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