High-low hydraulic switching mechanism as well as water spraying system and method for pavement milling machine

Abstract

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...

AI Technical Summary

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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