AUTOMATIC START-STOP MECHANISM FOR CORE DRILL

Title:

AUTOMATIC START-STOP MECHANISM FOR CORE DRILL

Document Type and Number:

WIPO Patent Application WO/2020/034365

Kind Code:

A1

Abstract:

An automatic start-stop mechanism for a core drill, comprising a center rod (14), a liquid channel starting module, an outer cylinder (23), an outer cylinder unlocking module, and a flow choking module. The center rod (14) penetrates through inner cavities of the liquid channel starting module, the outer cylinder unlocking module, and the flow choking module. The liquid channel starting module is provided behind the outer cylinder unlocking module and the outer cylinder (23). The liquid channel starting module is connected to the outer cylinder unlocking module. The automatic start-stop mechanism for a core drill can automatically communicate with a hydraulic channel to release the constraint on a working part, and can cut off the hydraulic channel after the working part reaches a designated position to stop pressure supply and drilling and can relieve pressure.

Inventors:

CHEN LING (CN)
XIE HEPING (CN)
GAO MINGZHONG (CN)
ZHANG ZHILONG (CN)
ZHANG RU (CN)
ZHANG ZETIAN (CN)
LU YIQIANG (CN)
LI CONG (CN)
HE ZHIQIANG (CN)
HUA XIA (CN)
MING CHUANJIAN (CN)
PENG GAOYOU (CN)
LU TONG (CN)

Application Number:

PCT/CN2018/109035

Publication Date:

February 20, 2020

Filing Date:

September 30, 2018

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Assignee:

UNIV SICHUAN (CN)
UNIV SHENZHEN (CN)

International Classes:

E21B44/00; E21B44/06

Foreign References:

CN202220594U	2012-05-16
CN103410498A	2013-11-27
CN102996111A	2013-03-27
US5794724A	1998-08-18

Attorney, Agent or Firm:

GAOYUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)

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