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Balance valve with secondary pressure overflow

A balancing valve and overflow technology, applied in the field of balancing valves, can solve the problems of 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: 2012-10-24
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
  • Balance valve with secondary pressure overflow
  • Balance valve with secondary pressure overflow

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Embodiment Construction

[0031] 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.

[0032] see figure 1 , The balance valve for the secondary pressure relief consists 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 processed with oil outlets A, T, the rear surface is processed with oil ports A1 and T1, and the oil ports T, T1 communicate with the T cavity. The oil outlet B is machined on the upper surface of the main valve body, and the right part of the main valve body 33 is machined with a stepped main valve cavity 43 , and the three oil ports A, A1, B communicate with the main valve cavity 43 respectively. The left part of the main valve body 33 is machi...

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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 them, the valve assembly is the key hydraulic component of this type of system, and its performance directly affects the performance of the whole machine. 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. [0003] For this reason, the applicant wishes to design a balance valve with a secondary pressure relief function. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and p...

Claims

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Application Information

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Patent Type & Authority Patents(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
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