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Balance valve with secondary pressure overflow

A balance valve and overflow technology, which is applied in the field of balance valves, can solve problems such as high cost and complicated connection structure, and achieve the effects of low manufacturing cost, high efficiency, and easy assembly, disassembly and maintenance

Active Publication Date: 2010-12-29
SHANGHAI LIXIN HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Balance valves and safety valves (pressure relief valves) are used in hydraulic load-bearing systems. They are generally connected by pipelines, and the connection structure is relatively complicated and the cost is high.

Method used

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  • Balance valve with secondary pressure overflow

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Embodiment Construction

[0031] In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to the specific figures.

[0032] see figure 1 , The balance valve of the secondary pressure relief is composed of the main valve part, the pilot control part and the secondary pressure relief mechanism.

[0033] see figure 2 , 3 The main valve part includes a main valve body 33. The front surface of the main valve body 33 is machined with oil ports A and T, and the rear surface is machined with oil ports A1 and T1. The oil ports T and T1 communicate with the T cavity. The oil outlet B is machined on the upper surface of the main valve body, and a stepped main valve cavity 43 is machined on the right part of the main valve body 33. The three oil ports A, A1, and B communicate with the main valve cavity 43 respectively. A pilot valve cavity 49 is machined on the left pa...

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PUM

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Abstract

The invention discloses a balance valve with secondary pressure overflow, comprising a main valve body. The main valve body is provided with an oil port A, an oil port B and an oil port T and is internally provided with a main valve cavity and a pilot valve cavity, wherein the oil port A and the oil port B are communicated with the main valve cavity, a main valve core, a pilot valve core and a spring are arranged in the main valve cavity, a control valve core is arranged in a pilot valve cavity, and a secondary pressure overflow mechanism is also arranged in the main valve body and comprises a pressure regulating valve core, a right containing cavity of the pressure regulating valve core, a left containing cavity of the pressure regulating valve core and a spring assembly. The invention has the advantages of fulfilling the functions of a balance valve and also having the characteristics of a safety valve, realizing overflow from the oil port B to the oil port T by the secondary pressure overflow mechanism as well as overload protection of the valve, ensuring that the medium pressure in equipment and the medium pressure in a pipeline are within regulated values and preventing accidents from occurring.

Description

technical field [0001] The invention relates to a valve assembly for a hydraulic device, in particular to a balance valve, which has an overload protection function. 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 valve components are the key hydraulic components of such systems, and their performance directly affects the performance of the whole machine. Balance valves and safety valves (pressure relief valves) are used in hydraulic load-bearing systems, and they are generally connected by pipelines. The connection structure is complicated and the cost is high. [0003] Therefore, the applicant wishes to design a balance valve with a secondary pressure relief function. SUMMARY OF THE INVENTION [0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a balance valve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B20/00
Inventor 袁才富刘峰伟朱剑根谷文平张坚金丹沈至伟
Owner SHANGHAI LIXIN HYDRAULIC