Multipath valve and engineering machinery

A multi-way valve and oil circuit technology, applied in mechanical equipment, servo motor components, fluid pressure actuators, etc., can solve problems affecting the use of hydraulic components, system temperature rise, energy waste, etc., and achieve the effect of reducing energy loss

Active Publication Date: 2013-01-23
SANY HEAVY IND CO LTD (CN)
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  • Abstract
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Problems solved by technology

But its disadvantage is that when the construction machinery performs compound actions, the pressure difference at both ends of the pressure compensation valve connected to the smaller load will be converted into heat

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  • Multipath valve and engineering machinery

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[0071] It should be pointed out that the description and sequence of specific structures in this section are only descriptions of specific embodiments, and should not be considered as limiting the protection scope of the present invention. In addition, the embodiments in this section and the features in the embodiments can be combined with each other under the condition of no conflict.

[0072] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0073] As shown in the figure, the multi-way valve of this embodiment includes a main valve group 100 , a first pilot valve group 200 and a second pilot valve group 300 .

[0074] Wherein, the main valve group 100 mainly includes or is provided with a first main reversing valve 11, a second main reversing valve 21, a third main reversing valve 31, a first switching valve 12, a second switching valve 15, a third switching valve Valve 25, fourth on-off valve 22, fifth on-...

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Abstract

The invention relates to the technical field of engineering machinery, and discloses a multipath valve and engineering machinery. The multipath valve comprises a main valve group, wherein the main valve group comprises a first main reversing valve, a second main reversing valve, a first differential pressure valve, a second differential pressure valve, a first switching valve, a second switching valve, a third switching valve, a first pressure selection valve, a second pressure selection valve, a third pressure selection valve, a first oil inlet path, a second oil inlet path, an oil returning path, a first feedback oil path and a second feedback oil path. By the multipath valve, shunting flow and convergence flow of double pumps can be controlled, so that composite action and single action of at least two working execution elements can be realized. Compared with the prior art, the multipath valve has the advantages that energy loss is reduced; furthermore, during shunting and convergence, before and after differential pressure of each main reversing valve is kept constant; and influence of load change on flow control of each main reversing valve is avoided.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a multi-way valve and construction machinery. Background technique [0002] A multi-way valve is a combination of more than two valve blocks to manipulate the movement of multiple actuators. Multi-way valves are mostly used in construction machinery. Construction machinery generally has multiple actions, but due to the different loads of each action, more than one action can be realized at the same time, and the effect is poor. [0003] In the prior art, in order to solve the above shortcomings, a pressure compensation valve is generally installed at the inlet of each reversing valve of the combined multi-way valve. The principle is to achieve the pressure balance of each action by increasing throttling and damping. But its disadvantage is that when the construction machinery performs compound actions, the pressure difference at both ends of the pressure compensat...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 易迪升张铁军王涛
Owner SANY HEAVY IND CO LTD (CN)
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