Cartridge inserted valve for engineering machinery load sensory system

Abstract

The invention discloses a cartridge inserted valve for engineering machinery load sensory system. The cartridge inserted valve comprises a cartridge inserted valve body, wherein the cartridge insertedvalve body is internally provided with a left and right penetrated valve hole; a valve core is slidingly connected in the valve hole; a screw sleeve is arranged at the left end of the cartridge inserted valve body; the screw sleeve is internally provided with a left and right penetrated installing hole; a transmission rod connected with the left end of the valve core through screw threads is slidingly connected in the installing hole; a screw plug in gap sleeving connection on the transmission rod is arranged at the left end of the valve core; a reset spring is arranged between the screw plugand the left end of the transmission rod in the installing hole; the right end of the valve hole is a Y liquid control oil opening; the valve core is provided with a third flow passing hole, a fourthflow passing hole and an eleventh flow passing hole; the right end of the third flow passing hole is communicated with the Y liquid control oil opening. The insertion and installing valve has the advantages that the structure is simple and reasonable; the manufacturing cost is low; the integration design is convenient; the hydraulic oil path can be simplified.

Description

technical field [0001] The invention relates to the technical field of cartridge valves, in particular to a cartridge valve used in load sensing systems of engineering machinery. Background technique [0002] The multi-actuator load-sensing system is an energy-saving hydraulic system widely used in vehicles, construction machinery, agricultural machinery, mining machinery, forestry machinery, and petroleum machinery. , Executive agencies and other components. Since the system is only supplied by a single pump, it can simultaneously control multiple actuators with different load pressures through the load-sensitive multi-way reversing valve, and can ensure that the speed does not change with the load pressure, so the vehicle and The operation performance of construction machinery can avoid the phenomenon that the low load is too fast and the high load stops. [0003] At present, the load-sensing multi-way directional valve used in the load-sensing system is generally in the...

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Problems solved by technology

[0003] At present, the load-sensing multi-way directional valve used in the load-sensing system is generally in the form of three-position six-way, mostly in the form of castings, or a piece-type multi-way directional valve or an integral multi-way directional valve. The reversing valve has an eight-slot structure, and is equipped with a corresponding shuttle valve assembly. The internal flow path is very complicated, resulting in a large overall volume, heavy weight, and high cost; and with the complexity of the hydraulic oil circuit, the existing multi-way changer The directional valve is not suitable for integrated design. In order to meet the complex hydraulic oil circuit, it is necessary to connect the multi-way directional valve with other functional valve blocks through many hoses, which makes the pipeline of the main engine complex and easily causes oil leakage.

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