Direct-acting internally piloted one-way sequence valve

Abstract

The invention discloses a direct-acting internally piloted one-way sequence valve, which comprises a valve body (1), a main valve spool (2), a pressure adjusting piston (3) and an adjusting rod (4). A liquid inlet (5) and a liquid outlet (6) are arranged on the valve body (1), the main valve spool (2), the pressure adjusting piston (3) and the adjusting rod (4) are arranged in the valve body (1), the outer diameter of the head at the upper end of the valve body (1) 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, a pressure adjusting spring is connected between the pressure adjusting piston (3) and the main valve spool (2), the adjusting rod is abutted to the pressure adjusting piston (3), a drainage channel (8) is arranged in the valve body, and a valve spool channel (9) for communicating the liquid inlet with the liquid outlet 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 direct-acting internally piloted one-way sequence valve are integrated.

Description

technical field [0001] The invention relates to the field of hydraulic valves, in particular to a direct-acting internal control 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 direct-acting sequence valve is divided into internal control type and external control type. The direct-acting internal control sequence valve judges whether to open the sequence valve according to the liquid pressure at the liquid inlet, that is, when the pressure at the liquid inlet is greater than and overcomes the pressure of the spring, The main spool can be driven by the control fluid to connect the inlet and outlet, and the sequence valve is opened, so that the hydraulic components of the next stage can work; under the action of reset. [0003] Since the direct-acti...

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Problems solved by technology

[0003] Since the direct-acting internal control one-way sequence valve is generally used in the hydraulic system, and the hydraulic parts and pipelines in the hydraulic system often need hollow hinged bolts to connect, when it is necessary to use the direct-acting internal control one-way sequence valve When it is necessary to install a direct-acting internal control one-way sequence valve on the pipeline, that is, the direct-acting internal control one-way sequence valve and the hinged bolt are separated, and they need to be installed and positioned separately during installation and use. The process is relatively troublesome. At this time The failure rate is also high, which is not conducive to maintenance and brings inconvenience to use

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