A hydraulic control system for boom elevation and swing of a jumbo
By using a combination of multiple pitch cylinders and hydraulic control circuits on the boom of the rock drilling rig, the problem of the boom not being able to fit the tunnel cross-section when pitching or swinging was solved, achieving more stable and precise hydraulic control and improving the tunnel forming accuracy.
CN224469392UActive Publication Date: 2026-07-07HENAN GENGLI ENG EQUIP CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN GENGLI ENG EQUIP CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-07
Smart Images
Figure CN224469392U_ABST
Abstract
The utility model discloses a hydraulic control system of rock drilling jumbo arm support elevation and depression and swing, its arm support includes base, swing seat, drill arm, propulsion beam assembly, swing seat is hinged on the base, and drill arm includes big arm, and one end of big arm is rotatably connected with swing seat, and the other end of big arm is connected with one end of small arm, and the other end of small arm is connected with propulsion beam assembly through rotary connecting piece, and first luffing oil cylinder, second luffing oil cylinder are connected between big arm and base, and third luffing oil cylinder, fourth luffing oil cylinder are connected between small arm and rotary connecting piece, and the hydraulic control circuit includes electromagnetic reversing valve, locking valve, first hydraulic lock, second hydraulic lock, hydraulic oil tank, is used for controlling the extension and contraction action of each oil cylinder, the utility model can control the elevation and depression and swing of each direction of arm support, realizes the demand of different angle work position of arch operation range.
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