Integral manual multiple-way valve

Abstract

The invention provides a technical scheme for integrated manual multi-way valves, characterized in that a double-functional relief valve is provided with left and right double-functional relief valves of a three-position slide valve, and a check valve is provided with a left check valve and a right check valve of the other three-position slide valve, wherein the left double-functional relief valve of the three-position slide valve is coaxially and fixedly connected to the left check valve of the other three-position slide valve, the right double-functional relief valve of the three-position slide valve is coaxially and fixedly connected to the right check valve of the other three-position slide valve, and the left and right double-functional relief valves are distributed on the upper ends of the three-position slide valves on the two sides of an upper oil inlet cavity, the axes of the left and right double-functional relief valves of the three-position slide valve are parallel with the axes of the other three-position slide valve and a four-position slide valve, the relief valve is parallel with the axis of one three-position slide valves and is positioned between the other three-position slide valve and the four-position slide valve, a check valve of the four-position slide valve is parallel with the axis of the three-position slide valves and is positioned between the other three-position slide valve and the four-position slide valve, and the three-position and four-position slide valves are provided with middle grooves thereof respectively.

Description

Technical field: [0001] The invention relates to a multi-way valve used in hydraulic systems of large and medium-sized engineering machinery, in particular to an integral manual multi-way valve. Background technique: [0002] In the prior art, the known technology is the DF series multi-way valve in use, and the DF series multi-way valve is the most widely used. The valve mainly adopts an integral valve body, and the check valve is integrated into the slide valve. Because the spool valve is integrated with a check valve and an oil-through oil chamber, the outer diameter of the spool valve is relatively large, which makes it difficult to process the spool valve and the spool valve hole, and at the same time, the internal leakage between the spool valve and the spool valve is relatively large. It is the weak point that existing technology exists. Invention content: [0003] The purpose of the present invention is to provide an integral manual multi-way valve technical solut...

AI Technical Summary

Problems solved by technology

Because the spool valve is integrated with a check valve and an oil-through oil chamber, the outer diameter of the spool valve is relatively large, which makes it difficult to process the spool valve and the spool valve hole, and at the same time, the internal leakage between the spool valve and the spool valve is relatively large. the shortcomings of the existing technology

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