Pilot proportional reversing valve

A proportional reversing valve and pilot-operated technology, which is applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problem that the number and technical indicators of proportional reversing valves cannot meet user requirements, and can not achieve neutral function and Problems such as transition state function and affecting the left and right movement of the spool of the proportional directional valve can solve the problem of external leakage, reduce the external leakage link, and increase the working pressure.

Inactive Publication Date: 2010-05-26
SHANGHAI LIXIN HYDRAULIC
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  • Description
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AI Technical Summary

Problems solved by technology

However, the existing pilot-operated proportional reversing valve is prone to external leakage, and its anti-oil pollution ability is weak, which affects the left and right movement of the spool of the proportional reversing valve and makes the output flow unstable.
[0003] At present, some proportional directional valves in China cannot meet the requirements of users in terms of quantity and technical indicators, especially the installation and connection dimensions of some domestic proportional directional valves do not meet international standards. The median function and transition state function, which cannot meet the requirements of various controls

Method used

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Embodiment Construction

[0026] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0027] refer to figure 1 , a pilot-operated proportional reversing valve, which includes a main valve body 8, a quantitative decompression valve 4 installed on the main valve body 8, and a pilot control valve installed on the quantitative decompression valve 4; the pilot control valve includes a pilot control valve The valve body 2, and the left and right proportional electromagnets 1 respectively installed at both ends of the pilot valve body 2; on the pilot valve body 2 at the upper position of the left and right proportional electromagnets 1, working oil ports B and A are respectively made, The left and right proportional electromagnets 1 convert an electrical signal into a proportional pressure output signal. A pilot valve core 3 is install...

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Abstract

The invention discloses a pilot proportional reversing valve, which comprises a main valve body and a pilot control valve arranged on the main valve body, wherein both ends of the main valve body are provided with a left end cover and a right end cover; and a main valve core and a main spring are arranged in the main valve body. The pilot proportional reversing valve is characterized in that: the pilot control valve comprises a pilot valve body and a left and a right proportion electro-magnets arranged at both ends of the pilot valve body; and a proportional reducing valve is arranged between the main valve body and the pilot valve body. The pilot proportional directional valve has the advantages of simplified structure, low cost, reduction of extravasation link, good spring guidance, high reliability and strong capability of resisting oil pollution.

Description

Technical field: [0001] The invention relates to a proportional directional control valve, specifically a pilot-operated proportional directional control valve. Background technique: [0002] In the hydraulic system, the reversing valve is one of the main components. We often need to implement the speed conversion of the actuator. As far as the existing hydraulic control device is concerned, it is generally solved by manually adjusting the flow valve, which is relatively complicated and the degree of automation is not high. There is also a combination of multiple reversing valves and flow valves to achieve the purpose of speed control. However, due to the use of too many valves in this method, the operation is complicated, mistakes are prone to occur, and accidents are caused. Moreover, the equipment is large in size and expensive. High, the system investment is also large. At present, a pilot-operated proportional reversing valve has appeared on the domestic market. Its f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B13/044F15B13/043
Inventor 袁才富刘峰伟朱剑根宋国良沈至伟
Owner SHANGHAI LIXIN HYDRAULIC
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