Proportional multi-way valve with steering load feedback

Abstract

The invention discloses a proportional multi-way valve with a turning load feedback function, comprising an oil inlet control joint valve body and a unit operation control joint valve body which are sequentially overlapped; a three-way flow valve core, a main overflow valve, and a turning valve core and a first pressure compensation valve which are integrated and matched are arranged in the oil inlet control joint valve body; an oil inlet of the three-way flow valve core is communicated with a pressure oil duct, and an oil return port of the three-way flow valve core is communicated with an oil return channel; the oil inlet of the main overflow valve is communicated with a load sensing port oil duct, and the oil return port of the main overflow valve is communicated with the oil return channel; the load sensing port oil duct is also communicated with a spring cavity control end of the three-way flow valve core; a unit control valve core and a second pressure compensation valve which are integrated and matched are arranged in the unit operation control joint valve body; the three-way flow valve core is arranged, so that the immediate discharge of real-time flow is realized, the action is flexible, and the control performance is improved; a turning auxiliary load feedback function is added, so that the operation efficiency of a whole machine and the actual operability are improved; and a two-position two-way electromagnetic valve is added, two operation modes, i.e. electrification and non-electrification are designed, so that the operation safety in configuration is improved.

Description

technical field [0001] The invention relates to the technical field of multi-way hydraulic valves, in particular to a proportional multi-way valve with steering load feedback function, which is especially suitable for forklift operation. Background technique [0002] At present, the multi-way valve configured by domestic forklifts is basically an ordinary multi-way reversing valve, which is an on-off valve. When the valve has a small opening and heavy load, it will not move, because the input flow cannot match the change of the valve core. , the entire output power is greatly wasted under non-full load conditions, so the actual operation consumes a lot of energy, and the controllability of the operating speed is poor. [0003] In the prior art, proportional fluid technology has been widely used, including proportional pressure valves, flow valves, reversing valves, and multi-way valves; for example, the Chinese invention patent "A Proportional Control "Multi-way valve" (ann...

AI Technical Summary

Problems solved by technology

[0002] At present, the multi-way valve configured by domestic forklifts is basically an ordinary multi-way reversing valve, which is an on-off valve. When the valve has a small opening and heavy load, it will not move, because the input flow cannot match the change of the valve core. , the whole output power has a huge waste under the non-full load condition, so the actual operation consumes a lot of energy, and the controllability of the operating speed is poor

[0003] In the prior art, proportional fluid technology has been widely used, including proportional pressure valves, flow valves, reversing valves, and multi-way valves; for example, the Chinese invention patent "A Proportional Control "Multi-way valve" (announcement number is CN201963627U) is such a design; the built-in inclined connection and the basic connection are respectively equipped with a tilting valve and a basic valve, and the tilting valve and the basic valve are equipped with pressure compensators; the main oil

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