The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2023
Filed:
May. 17, 2022
Hohai University, Jiangsu, CN;
Shaobin Hu, Jiangsu, CN;
Yukang Cai, Jiangsu, CN;
lingzhi Xi, Zhejiang, CN;
huai Yang, Zhejiang, CN;
Zhengyong Yan, Jiangsu, CN;
Shuogang Pang, Jiangsu, CN;
qiang Zhang, Zhejiang, CN;
Lin Zhang, Jiangsu, CN;
chen Li, Zhejiang, CN;
HOHAI UNIVERSITY, Jiangsu, CN;
POWERCHINA Huandong Engineering Corporation Limited, Zhejiang, CN;
Abstract
A control method of a drill jumbo is provided. The drill jumbo includes a pre-splitting arm, a drill arm, and a chamber. The pre-splitting arm includes a positioning device, a fixing buckle, a longer rod, an electric telescopic rod, and a water injection opening. The chamber includes a constant pressure valve, an excitation circuit, and a port. A computer controls the positioning device to perform positioning, afterwards, the fixing buckle is opened, the telescopic rod is started, the longer rod is jacked into a position in the hole, and oil is injected into a hydraulic expansion capsule. After blocking of the hole is completed, water is injected into the water injection opening. The port is opened to inject a mixed-phase fluid. The port is closed, the excitation circuit is started, and after a pressure rises to a set value, the constant pressure valve is opened.