Pressure control valve

Abstract

The invention discloses a pressure control valve. The pressure control valve includes a valve sleeve, a screw sleeve and a valve control component, a valve cavity with an open upper end is arranged inthe valve sleeve, and the screw sleeve is in threaded connection to the upper end of the valve sleeve; the bottom of the valve cavity in the valve sleeve is provided with a lower valve hole downwardsalong the axial direction, the bottom of the lower valve hole in the valve sleeve is provided with a lower slide hole, and the screw sleeve is provided with an upper valve hole upwards at the end surface facing the valve cavity; the side of the valve sleeve is provided with a P opening and an X opening, the lower end of the valve sleeve is provided with an A opening, and the side of the screw sleeve is provided with a T opening communicating with the upper valve hole; a first plug body is slidably connected in the lower valve hole, the upper end of the first plug body is provided with a firstconnecting column, and the upper end of the first connecting column is provided with a first cone valve body; and a second plug body is slidably connected in the upper valve hole, the lower end of the second plug body is provided with a second connecting column, and the lower end of the second connecting column is provided with a second cone valve body. The pressure control valve is not only simple in structure and compact in volume, but also can effectively make the pressure of an energy accumulator equal to the pressure of a rodless cavity of a boom cylinder.

Description

technical field [0001] The invention belongs to the technical field of hydraulic valves, in particular to a pressure control valve. Background technique [0002] The wheel side supports of construction machinery such as loaders, skid steer loaders, backhoe loaders and telescopic forklifts are rigidly connected to the frame, and the excitation vibration caused by uneven road surfaces is completely borne by the four tires. When the above-mentioned construction machinery is in the process of driving or working, the boom cylinder does not move, and the boom, boom cylinder, and front frame are similar to rigid connections at this time. Due to the effect of road conditions and tires, the whole vehicle will center on the front axle. Swinging will sometimes cause the rear axle to break away from the ground, and the driver's body will swing with the vehicle at this time, making it difficult to control and driving comfort is very poor. Because the working device, heavy objects and ot...

AI Technical Summary

Problems solved by technology

[0004] In the above two technologies, because the solenoid valve controls the accumulator to communicate with the rodless chamber of the boom cylinder for liquid filling during a certain operation process, the unequal load will cause the vibration reduction function to be realized At this time, the pressure of the boom cylinder is not equal to the pressure of the accumulator, so that the boom cylinder suddenly extends or retracts, which in turn causes the material in the bucket to scatter

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