High-low hydraulic switching mechanism, water spray system and method for road milling machine
A technology of water spray system and switching mechanism, which is applied in the directions of machines/engines, roads, roads, etc., can solve problems such as increasing the production cost of the whole machine, and achieve the effect of prolonging the life of milling cutters, avoiding excessive water spraying, and saving production costs.
Active Publication Date: 2018-07-10
柳工无锡路面机械有限公司
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Problems solved by technology
[0004] Therefore, in order to meet normal operation requirements, traditional large milling machines need to be equipped with two sets of independent water spray systems (high-pressure water spray and low-pressure water spray), which greatly increases the production cost of the whole machine and does not Can bring more benefits and better products to users
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[0022] see figure 1 with figure 2 , a high-low hydraulic switching mechanism for a road milling machine related to the present invention, the mechanism includes an electromagnetic reversing valve 1, and the electromagnetic reversing valve 1 is a three-position, four-way electromagnetic reversing valve, and the electromagnetic reversing valve Oil port 1-1 of valve 1 is connected to oil inlet P, oil port 2 1-2 of electromagnetic reversing valve 1 is connected to oil return port T1, oil port 3 1-3 of electromagnetic reversing valve 1 is decompressed The valve 6 and the electric proportional speed regulating valve 5 are connected to the second oil port 3-2 of the shuttle valve 3, and the oil port 4 1-4 of the electromagnetic reversing valve 1 is connected to the first port of the shuttle valve 3 through the one-way throttle valve 2. Three oil ports 3-3, the first oil port 3-1 of the shuttle valve 3 is connected to the oil outlet A;
[0023] When electromagnetic coil 1 Y1 of ele...
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The invention provides a high-low hydraulic switching mechanism as well as water spraying system and method for a pavement milling machine. The high-low hydraulic switching mechanism comprises an electromagnetic reversing valve (1), wherein a three-position four-way electromagnetic reversing valve serves as the electromagnetic reversing valve (1); an oil port I (1-1) of the electromagnetic reversing valve (1) is connected to an oil inlet (P); an oil port II (1-2) of the electromagnetic reversing valve (1) is connected to an oil return port (T1); an oil port III (1-3) of the electromagnetic reversing valve (1) is connected to a second oil port (3-2) of a shuttle valve (3) through a pressure reducing valve (6) and an electric proportional speed regulating valve (5); an oil port IV (1-4) of the electromagnetic reversing valve (1) is connected to a third oil port (3-3) of the shuttle valve (3) through a one-way throttling valve (2); and a first oil port (3-1) of the shuttle valve (3) is connected to an oil outlet (A). By adoption of the high-low hydraulic switching mechanism as well as water spraying system and method provided by the invention, switching between the high pressure and the low pressure can be achieved.
Description
technical field [0001] The invention relates to a structure for high-pressure switching of hydraulic oil of a water pump applied to a road surface milling machine, and a high-low pressure water spray system and a water spray method made by applying the structure, belonging to the field of road surface engineering machinery equipment. Background technique [0002] At present, the working process of the road milling machine is actually to use the milling cutter to rotate the road layer; during the cutting process, the temperature of the milling cutter will inevitably increase and the wear of the milling cutter will be accelerated, and the waste that is cut will be in the milling cutter. A large amount of dust will be generated under high-speed rotating cutting. [0003] Effectively reducing the milling machine tool wear and reducing the dust generated by the milling machine during the operation process is the key to improving the life of the milling machine cutter, improving w...
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IPC IPC(8): F15B13/02F04B49/00E01C23/088
CPCE01C23/088F04B49/002F15B13/02F15B2211/50
Inventor 张恒郡黄晓
Owner 柳工无锡路面机械有限公司