Title:
HYDRAULIC SYSTEM FOR BORING
Document Type and Number:
Japanese Patent JP2023127760
Kind Code:
A
Abstract:
To provide a hydraulic system for boring capable of detecting a twist in a boring shaft.SOLUTION: A hydraulic system 1A for boring according to an embodiment is loaded on a boring machine having a boring shaft in a telescopic structure, including a hydraulic motor 4 to rotate the boring shaft, a directional control valve 3 connected to the hydraulic motor 4 through a pair of supply/exhaust lines 41, 42, and a hydraulic pump 2 connected to the directional control valve 3 through the discharge line 22. Further, the hydraulic system 1A includes a pressure sensor 81 measuring discharge pressure of the hydraulic pump 2, a rotational speed sensor 73 measuring rotational speed of the hydraulic motor 4, and a controller 6 electrically connected to the pressure sensor 81 and the rotational speed sensor 73. The controller 6 determines occurrence of a twist in the boring shaft 17 when the discharge pressure of the hydraulic pump 2 measured with the pressure sensor 81 is larger than a first threshold and the rotational speed of the hydraulic motor 4 measured with the rotational speed sensor 73 is smaller than a second threshold.SELECTED DRAWING: Figure 1
More Like This:
| WO/2014/055276 | SELF-LOCKING TOP DRIVE GUIDE SYSTEM |
| WO/2009/098478 | HYDRAULIC CONNECTOR APPARATUSES AND METHODS OF USE WITH DOWNHOLE TUBULARS |
Inventors:
YOSHIDA IBUKI
KURODA YUICHIRO
KURODA YUICHIRO
Application Number:
JP2022031645A
Publication Date:
September 14, 2023
Filing Date:
March 02, 2022
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
E21B3/02; E02F9/20; E21B17/07
Attorney, Agent or Firm:
Ariko Patent Office
Previous Patent: Display device manufacturing method and display device
Next Patent: plasma processing equipment
Next Patent: plasma processing equipment