A two-position five-way valve oil port switching structure

Abstract

The invention discloses a two-position five-way valve oil port switching structure, which belongs to the technical field of hydraulic valves. A spool is installed in the spool hole of the valve body; a left hydraulic control joint is installed at the left end of the spool hole of the valve body, a right hydraulic control joint is installed at the right end of the spool hole of the valve body, and a spring is installed between the right end of the spool and the right hydraulic control joint. ;The valve body is provided with oil port A, oil port B, oil port E, oil port C, and oil port D from left to right in sequence; the valve core is provided with a first groove and a second groove in sequence from left to right , the third groove, the fourth groove, and the fifth groove. The invention can realize the traditional oil circuit form that needs to be combined with multiple reversing valves. Its equivalent oil port switching principle and hydraulic valve oil circuit function are innovative. Its structure is simple, safe and reliable. The connection mode is convenient for later maintenance and replacement, and provides a new hydraulic valve oil circuit function form and structural realization form for hydraulic valve designers.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a two-position five-way valve oil port switching structure. Background technique [0002] The hydraulic control reversing valve is a reversing valve that uses the pressure of the pilot liquid to change the movement of the spool. The spool is pushed by the external pilot pressure to change the oil flow direction of the hydraulic system. The reversing is directly completed by the internal structure. , less control links, reliable action, compared with the electromagnetic reversing valve, it reduces the number of control elements, improves the reliability of system control and operation, and solves the problem of frequent failures of the electromagnetic reversing valve. [0003] In the hydraulic system, it is often required that the two working oil ports of the actuator can be connected when the work is stopped, so that the working device is in a floating state and can move...

AI Technical Summary

Problems solved by technology

[0007] At present, the functional form of the existing reversing valve cannot satisfy the need to realize the serial connection of the working oil port after the spool is reversing, and then satisfy the requirement of keeping the working device in a floating state, and the existing multi-channel hydraulic control reversing valve structure is still common. The following disadvantages:

[0008] 1. The valve body is separated from the end cover, and the end cover is connected to the valve body by screws. This structure leads to a large number of structural parts, a large volume of the reversing valve, increased weight, and poor economy;

[0009] 2. The inside of the end cover is generally reset by a spring, so it is laborious to disassemble and install the screw for the end cover installation and the spring is prone to torsional deformation

Although this structure can also realize the on-off of the oil port by changing the pilot pressure, the structure is too complicated, the number of structural parts is large, and the economy is poor. Inconvenience

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