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Balance valve

A technology of balance valve and valve body, applied in the field of balance valve, can solve the problems of high manufacturing cost, complex structure of balance valve, poor sealing performance, etc., and achieve the effect of improving service life, strength and good balance

Inactive Publication Date: 2009-05-20
SHANGHAI LIXIN HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a balance valve to solve the problems of complex structure, high manufacturing cost and poor sealing performance of the existing balance valve

Method used

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Embodiment Construction

[0021] 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.

[0022] Figure 1, figure 2 As shown, a balance valve includes a valve body 1, which contains a set of balance valve assemblies, and an end cover 14 is installed at the end of the valve body. The end cover 14 and a set of balance valve assemblies can form a plug-in balance valve. The connection form between the body and the system can be made into a plate type or a flange type, and the valve body 1 can also be used without the valve body 1, as long as an insertion hole is made on the manifold block, it can be installed.

[0023] A main valve hole is made in the length direction of the valve body 1, and a set of balance valve components can be installed. The side of the valve body 1 is respectively made with the A main oil port 7 and the B main oil...

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Abstract

The invention provides a balance valve which is used to solve the problems that the prior balance valve has a complex structure, high manufacturing cost and poor sealing performance. The balance valve comprises a valve body; the end part of the valve body is provided with an end cover; the side of the valve body is provided with a first main oil port and a second main oil port; the end face of the end cover is provided with a control port; the valve body is manufactured into a main valve hole along the length direction; a balance valve component and a main valve are sequentially arranged in the main valve hole; the balance valve component comprises a valve sleeve; the valve sleeve is provided with axial through holes; and a cone valve, a pilot valve and springs are sequentially arranged in the valve sleeve. The balance valve is characterized in that the pilot valve is a pilot cone valve; and the number of the springs is two. In the balance valve, the pilot valve and the main valve have a cone valve structure so as to improve the sealing performance of a one way valve; the pilot valve and the main valve are controlled through two springs with different rotating directions, on the premise of reducing no composite force of the springs, the balance valve reduces the force of a single spring, thereby improving the service life of the springs; and the right end of a sleeve is added with a sealing ring so as to improve the sealing performance of a control chamber.

Description

technical field [0001] The invention relates to the technical field of hydraulic control valves, in particular to a balance valve. Background technique [0002] In modern engineering machinery, construction machinery and other mechanical equipment, a large number of hydraulic load-bearing systems are used, among which the balance valve is the key hydraulic component of this type of system, and its performance directly affects the performance of the whole machine. The balance valve is mainly composed of a control valve and a main valve. There are two common types: single-stage and pilot-operated. The single-stage main valve and the control valve are connected in parallel, and the pilot-operated main valve and the control valve are nested. The common disadvantage of the performance of all kinds of hydraulic balance valves is that when the hydraulic load-bearing system is descending under load, it is difficult for the spool opening of the balance valve to stabilize at a certain...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 袁才富米根祥朱剑根沈至伟
Owner SHANGHAI LIXIN HYDRAULIC
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