Pilot-operated one-way sequence valve

Abstract

The invention discloses a pilot-operated one-way sequence valve, which comprises a valve body (1), a main valve spool (2), a pilot valve and an adjusting rod (3). A liquid inlet (4) and a liquid outlet (5) are arranged on the valve body (1), the main valve spool (2), the pilot valve and the adjusting rod (3) are arranged in the valve body, the outer diameter of the head at the upper end of the valve body is larger than that of a portion below the head, an external thread is arranged on the portion below the head of the valve body which is vertically through, the liquid inlet (4) is arranged at an opening of the lower end of the valve body, the liquid outlet is arranged on the valve wall of the portion below the head of the valve body, a reset spring (6) is connected between the pilot valve and the main valve spool (2), a pilot valve cavity (7) is arranged in the pilot valve and communicated with the outside through a drainage channel (8), and an axial channel (9) is arranged on the main valve spool. The external shape of the valve body is equivalent to that of a hinged bolt, a hydraulic part and a pipeline can be connected by the valve body, and the hinged bolt and the pilot-operated one-way sequence valve are integrated.

Description

technical field [0001] The invention relates to the field of valves, in particular to a pilot-operated one-way sequence valve. Background technique [0002] A sequence valve is a valve that controls the hydraulic pressure to open and close the valve port in a system with two or more branch circuits, thereby controlling the actuator to achieve predetermined sequence actions. The pilot-operated sequence valve uses the pilot valve to balance the hydraulic pressure of the liquid inlet. When the hydraulic pressure of the liquid inlet is lower than the spring pressure connected to the pilot spool, the sequence valve is closed. When the hydraulic pressure of the liquid inlet is higher than the spring pressure connected to the When the spring pressure on the pilot spool is pressed, the pilot spool is pushed open. At this time, the liquid in the pilot valve returns to the oil tank, and the main spool of the sequence valve moves, so that the liquid inlet and outlet are connected, and ...

AI Technical Summary

Problems solved by technology

[0003] Since the pilot-operated one-way sequence valve is generally used in the hydraulic system, and the hydraulic parts and pipelines in the hydraulic system often need hollow hinge bolts to connect, when the pilot-operated one-way sequence valve needs to be used, A pilot-operated one-way sequence valve is additionally installed on the pipeline, that is, the pilot-operated one-way sequence valve and the hinged bolts are separated, and they need to be installed and positioned separately during installation and use. The process is relatively troublesome, and the failure rate is also high at this time, which is not conducive to Overhaul, causing inconvenience to use

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