Novel feeding hydraulic system of all-hydraulic drill
A hydraulic system and full hydraulic technology, which is applied in the field of new feeding hydraulic system of full hydraulic drilling rig, can solve the problems of complex oil circuit, many hydraulic pumps and control valves, and increased drilling rig cost, so as to simplify the pipeline and save the mechanical floating. installation, cost reduction effect
Active Publication Date: 2014-01-22
LIANYUNGANG TIANMING EQUIP +1
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Problems solved by technology
In order to achieve these goals, domestic and foreign drilling rigs usually use independent oil circuits for each action. The direct result of this method is that there are too many hydraulic pumps and control valves, the oil circuits are too complicated, and the cost of drilling rigs is greatly increased.
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[0008] A new feed hydraulic system for a fully hydraulic drilling rig, including a reversing valve I8, a reversing valve II7, a proportional relief valve 10, and a hydraulic cylinder. The P port of the reversing valve I8 communicates with the pressure oil inlet I, and the reversing valve The P port of Ⅱ7 is connected with the pressure oil inlet Ⅱ, and the A port of the reversing valve Ⅰ8 1 A of port and reversing valve Ⅱ7 2 Both ports communicate with the rodless chamber 2 of the hydraulic cylinder through the balance valve 6, and the B of the reversing valve I8 1 B of the port and reversing valve Ⅱ7 2 The port communicates with the rod chamber 1 of the hydraulic cylinder through the rod chamber oil circuit, and the oil circuit between the balance valve 6 and the rodless chamber 2 of the hydraulic cylinder is set as the rodless chamber oil circuit. There is a shuttle valve 11 between the P port of 10, and the B port of the reversing valve I8 1 B of the port and reversing va...
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A novel feeding hydraulic system of an all-hydraulic drill comprises a reversing valve I, a reversing valve II, a proportional overflow valve and a hydraulic oil cylinder. A port A1 of the reversing valve I and a port A2 of the reversing valve II are communicated with a rodless cavity of the hydraulic oil cylinder. A port B1 of the reversing valve I and a port B2 of the reversing valve II are communicated with a rod cavity of the hydraulic oil cylinder through a rod cavity oil path. An oil path between a balance valve and the rodless cavity of the hydraulic oil cylinder is arranged to be a rodless cavity oil path. A pilot operated directional control valve is arranged between the rodless cavity oil path and the rod cavity oil path. According to the novel feeding hydraulic system of the all-hydraulic drill, through the interaction and switching among all the valves, the eight actions of slow feeding, slow lifting, fast feeding, fast lifting, pressure drilling, reduced pressure drilling, weighing and hydraulic cylinder floating needed for feeding of the drill are realized. The whole hydraulic system is integrated into one valve block, so that pipelines are simplified, and cost is greatly reduced; meanwhile, according to the system, a thread entering and retreating space can be reserved for assembling a drill rod on the drill and disassembling the drill rod from the drill, and therefore a traditional mechanical floating device needed by the drill is eliminated.
Description
technical field [0001] The invention relates to a hydraulic system, in particular to a new feed hydraulic system of a full hydraulic drilling rig. Background technique [0002] The feed hydraulic system is indispensable in the hydraulic system of the full hydraulic drilling rig, and the success or failure of its design is directly related to the performance and production cost of the entire drilling rig. The feed hydraulic system usually needs to realize at least seven actions of slow feeding, slow lifting, fast feeding, fast lifting, pressurized drilling, decompression drilling and weighing. In order to achieve these goals, domestic and foreign drilling rigs usually use independent oil circuits for each action. The direct result of this method is that there are too many hydraulic pumps and control valves, the oil circuits are too complicated, and the cost of drilling rigs is greatly increased. Contents of the invention [0003] The technical problem to be solved by the p...
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IPC IPC(8): F15B11/02F15B11/08
Inventor 卢明立姜汉勇徐宗君陈义俊
Owner LIANYUNGANG TIANMING EQUIP