Jack device for automatically controlling separation trend of roadway roof

• Main Authors: ZHANG DEZHI, ZHOU WENYING, XU XIAOLIAN, XU HONGSHAN, YUAN QIANGGUO
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2023
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HAULING; HEATING; HOISTING; HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD; HYDRAULICS OR PNEUMATICS IN GENERAL; LIFTING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TRANSPORTING; WEAPONS

The invention discloses a jack device for automatically controlling the separation trend of a roadway roof, which comprises a jack and a hydraulic control system, and the jack comprises a lug ring, and an outer cylinder body, a second-stage cylinder body and a third-stage cylinder body which are coaxial; a stroke sensor I and a stroke sensor II are mounted in the outer cylinder body; a pressure sensor is mounted outside the outer cylinder body; the hydraulic control system controls hydraulic oil in and out of the first hydraulic oil port and the second hydraulic oil port according to sensor signals. The bed separation roof is supported through the jack, the bed separation change trend of the roof is automatically judged through change signals of the first stroke sensor, the second stroke sensor and the pressure sensor in the jack, the pressure of the hydraulic cavity in the jack is changed according to the judged change trend, and the jack completes various telescopic actions; and reinforced supporting of the