An oil circuit distribution valve for large flow hydraulic system

Abstract

The invention discloses an oil path distribution valve for a large-flow hydraulic system. The oil path distribution valve comprises a valve body which is provided with an oil port P1, an oil port P2,an oil port A, an oil port B, an oil port C and an oil port D, wherein a mounting hole is formed in the valve body, and a main valve element is slidably connected in the mounting hole; a first shoulder, a second shoulder and a third shoulder are arranged on the side face of the main valve element, an end cover is arranged at the position, located at the left end of the mounting hole, of the valvebody, and a control cavity is formed between the first shoulder and the end cover; a plug is arranged at the position, located at the right end of the mounting hole, of the valve body, and an oil return cavity is formed between the third shoulder and the plug; a spring which is used for forcing the main valve element to move leftwards is arranged in the oil return cavity, one end of the spring abuts against the right end of the main valve element, and the other end of the spring abuts against the plug; and a two-position three-way electromagnetic valve, a low-pressure selection assembly and ashuttle valve assembly are arranged on the end cover. The oil path distribution valve is simple in structure, compact in size and convenient to install, and is capable of achieving the distribution function of a hydraulic oil path.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to an oil circuit distribution valve used in a large-flow hydraulic system. Background technique [0002] In modern industrial hydraulic and mobile machinery hydraulic oil circuits, a large number of identical actuators (hydraulic cylinders or hydraulic motors) are used in parallel and sequentially acting oil circuits. Such as Image 6 As shown, in the existing hydraulic system, the corresponding number of electro-hydraulic proportional multi-way valves is generally selected according to the number of actuators to control the actuators. The disadvantages in the existing oil circuit are: (1) the price of each electro-hydraulic proportional multi-way valve is expensive, the market price is 3,000-4,000 yuan, and there is cost pressure on mechanical equipment with low price; (2) Each electro-hydraulic proportional valve must be equipped with an amplifier or controller, and the...

AI Technical Summary

Problems solved by technology

The disadvantages in the existing oil circuit are: (1) the price of each electro-hydraulic proportional multi-way valve is expensive, the market price is 3000-4000 yuan, and there is cost pressure for mechanical equipment with low price; Each electro-hydraulic proportional valve must be equipped with an amplifier or controller, and the selection of multiple electro-hydraulic proportional valves also increases the cost of electronic control and the complexity of the system

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