Title:
SPECIAL DRILL BIT CAPABLE OF PREVENTING ROCK BURSTS
Document Type and Number:
WIPO Patent Application WO/2022/007210
Kind Code:
A1
Abstract:
A special drill bit capable of preventing rock bursts. The special drill bit capable of preventing rock bursts comprises a drill rod (1) and a blade (21), wherein a spiral blade (2) is fixed on one side of the drill rod (1); a first limiting block (3) is fixed on one end of the drill rod (1); one end of the drill rod (1) is provided with a connecting block (4); one side of the connecting block (4) is provided with a mounting hole (5); one end of the connecting block (4) close to the drill rod (1) is provided with a first pressing groove (6); a first spring (7) is arranged between the first pressing groove (6) and the drill rod (1); and a first limiting groove (8) is arranged on one side of the first pressing groove (6) close to the first limiting block (3). When the special drill bit capable of preventing rock bursts is impacted, the drill rod (1) is pressed, such that the first limiting block (3) is driven to slide relative to the first limiting groove (8); in addition, the first spring (7) is pressed at the same time, and the impact force on the drill bit is reduced by the first spring (7) by means of the elasticity of the first spring, such that the drill bit, when in use, can be prevented from being impacted; and the special drill bit capable of preventing rock bursts further facilitates the installation and positioning of the blade by arranging structures such as a sliding block (20), a sliding groove (19), a closing plate (13), a steel bead (18) and a clamping groove (15).
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Inventors:
ZHANG XIAN RONG (CN)
GAO CHAO (CN)
ZHANG AO (CN)
ZHANG SONG LIN (CN)
LI LIANG (CN)
ZHU WEN FENG (CN)
GAO CHAO (CN)
ZHANG AO (CN)
ZHANG SONG LIN (CN)
LI LIANG (CN)
ZHU WEN FENG (CN)
Application Number:
PCT/CN2020/119121
Publication Date:
January 13, 2022
Filing Date:
September 29, 2020
Export Citation:
Assignee:
ZOUCHENG YANKUANG TAIDE IND AND TRADE CO LTD (CN)
International Classes:
E21B10/00; E21B10/62; E21B17/07; E21B17/22
Foreign References:
| CN111706260A | 2020-09-25 | |||
| CN212535552U | 2021-02-12 | |||
| CN208518610U | 2019-02-19 | |||
| CN201144639Y | 2008-11-05 | |||
| CN201826770U | 2011-05-11 | |||
| CN206503559U | 2017-09-19 | |||
| CN111350463A | 2020-06-30 | |||
| CN208830889U | 2019-05-07 | |||
| CN206794849U | 2017-12-26 | |||
| US20130014996A1 | 2013-01-17 |
Attorney, Agent or Firm:
JINAN ZHIBEN INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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