Slicing-type manual multi-way reversal valve

Abstract

The invention discloses a slicing-type manual multi-way reversal valve which is characterized in that various reversal valve parts are connected in parallel in a valve body; an oil inlet of a main throttle valve positioned at one end of the valve body is communicated with a main oil inlet connector of the valve body to form a main oil way; an oil outlet of the main throttle valve is connected with the corresponding reversal valve parts by mutually independent branch oil ways; a pressure oil independence oil inlet connector is introduced, and enters a hydraulic control one-way valve through the reversal valve parts; and an oil outlet of the hydraulic control one-way valve is connected with various branch operating oil cylinders and returns back to an oil tank through an oil return connector. The slicing-type manual multi-way reversal valve is compact in structure, small in size, good in sealability and reliable in function, and is particularly suitable for application in hydraulic systems of farm machineries such as a harvester.

Description

technical field [0001] The invention relates to hydraulic components in engineering machinery, more specifically to a multi-way reversing valve specially used in hydraulic systems of agricultural machinery such as harvesters. Background technique [0002] The segmented multi-way reversing valve is an important component in the hydraulic system of agricultural machinery such as harvesters. It is used to control the expansion and contraction of the harvester's header lifting cylinder, reel lifting cylinder, and walking continuously variable transmission cylinder. The split multi-way reversing valve is a valve group in which each reversing valve is made into one piece and then connected with bolts, that is, a variety of unit valves are combined into multi-way valves with different functions, which expands the scope of use of the valve; at the same time, Scrapping one piece during processing does not affect other valve pieces and is easy to repair and replace. However, the foll...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing multi-way reversing valve has large volume and mass, and many processing surfaces, which is difficult to meet the processing accuracy requirements in practical applications;

[0004] 2. There is a need to seal between each piece, which may lead to a high possibility of leakage;

[0005] 3. Improper tightening of the connecting bolts between the discs may cause the deformation of the valve body hole and cause the valve stem to jam

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