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Multi-way reversing valve

A multi-way reversing valve and reversing valve technology, which is applied in the field of hydraulic valves, can solve the problems of restricting the use and development of hydraulic systems, insufficient compact structure, and large valve group volume, and achieve easy promotion, compact structure, and internal flow channels. simple effect

Inactive Publication Date: 2017-06-13
LOVOL HEAVY IND +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the principle of this method is complicated, the volume of the valve group is large, and the structure is not compact enough. In addition, due to the complexity of the flow channel, the system efficiency is low, the pressure loss is large, and the cost is high, which restricts the use of hydraulic systems in engineering and agricultural machinery. and development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 2 As shown, a multi-way reversing valve includes a three-position, four-way electromagnetic reversing valve unit 4, the oil inlet of the three-position, four-way electromagnetic reversing valve unit 4 communicates with the main oil inlet oil circuit, and the three-position, four-way electromagnetic reversing valve unit 4 communicates with the main oil inlet oil circuit. The oil return port of the reversing valve unit 4 communicates with the main oil return circuit. In the neutral position, the oil inlet port of the three-position four-way electromagnetic reversing valve unit 4 is disconnected from the working oil port. In this embodiment, the spool valve performance code of the working position function of the three-position four-way electromagnetic reversing valve unit 4 is "Y".

[0026] The three-position four-way manual reversing valve unit 3 is connected in parallel with the three-position four-way electromagnetic reversing valve unit 4, the oil inl...

Embodiment 2

[0034] The structure of the second embodiment is basically the same as that of the first embodiment. The difference is that a shuttle valve 7 is arranged between the working oil port of the three-position four-way electromagnetic reversing valve unit 4 and the control oil port of the hydraulically controlled neutral unloading valve 2 . A shuttle valve 7 is arranged between the working oil port of the three-position four-way manual reversing valve unit 3 and the control oil port of the hydraulically controlled neutral unloading valve 2, such as Figure 4 shown.

[0035] The multi-way reversing valves of Embodiment 1 and Embodiment 2 can be used for but not limited to harvesting machines such as corn harvesters, wherein the oil cylinder of the ear-picking platform is controlled by the three-position four-way electromagnetic reversing valve unit 4 .

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Abstract

The invention discloses a multi-way reversing valve, which includes a reversing valve unit, the oil inlet of the reversing valve unit communicates with the main oil inlet oil circuit, and the oil return port of the reversing valve A hydraulically controlled neutral unloading valve is set between the main oil inlet oil circuit and the main oil return oil circuit, and the control oil port of the hydraulically controlled neutral unloading valve is connected to the reversing valve unit The working oil port of the reversing valve unit is connected; in the neutral state, the oil inlet port of the reversing valve unit is disconnected from the working oil port. The switching of each action of the reversing valve is stable and reliable, the internal structure is simple and compact, the pressure loss is small, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a multi-way reversing valve. Background technique [0002] Harvesting machinery is an indispensable equipment in agricultural production, and corn harvester is the most representative equipment in harvesting machinery. Its working parts are mainly composed of ear picking platform, field returning machine, ear box and other parts. Different harvesting machinery has different working parts, but these working parts are mainly driven by hydraulic cylinders. At this stage, the hydraulic system of the working device of the harvesting machine is mainly composed of a gear pump, a multi-way valve, and a hydraulic cylinder. By controlling the operating valve stem of the multi-way valve, the direction of the hydraulic oil entering the cylinder is controlled, and then the working parts of the harvesting machine are controlled to perform according to the prescribed actions. . With ...

Claims

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Application Information

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IPC IPC(8): F15B13/02
CPCF15B13/02F15B2013/004
Inventor 李天富赵锐武小伟刘佳孟维旭张义顺辛国强张步坤
Owner LOVOL HEAVY IND
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