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Main valve element of precise pressure reducing valve and production technology

A technology of pressure reducing valve and main valve core, which is applied to valve devices, engine components, mechanical equipment, etc., can solve the problems of complex structure, high requirements on smoothness and concentricity, and low processing qualification rate of main valve core, etc. The effect of processing qualification rate, simple processing technology and quality index improvement

Active Publication Date: 2013-12-11
ZHEJIANG BLCH PNEUMATIC SCI & TECH
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Problems solved by technology

[0002] Precision pressure reducing valve is a kind of pressure reducing valve with high technical content. At present, domestic success is rare. The main valve core of traditional precision pressure reducing valve adopts integral structure. Because the spherical surface of its end is processed by precision lathe Its smoothness and concentricity requirements are very high. At the same time, due to its complex structure, the vulcanized layer on the second shoulder of the main valve core is also difficult to meet the technical requirements, resulting in a very low processing pass rate of the main valve core, which has become a constraint for precision decompression. The key to valve success

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  • Main valve element of precise pressure reducing valve and production technology
  • Main valve element of precise pressure reducing valve and production technology
  • Main valve element of precise pressure reducing valve and production technology

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Embodiment Construction

[0022] The structure of the main spool of the traditional precision pressure reducing valve is shown in figure 1 , it adopts an integral structure. The SR3 spherical surface is generally processed by a precision lathe, which requires high precision and non-concentricity. At the same time, due to the complex overall structure, it brings difficulties to the vulcanization of its shoulder. Therefore, the pass rate of this main valve core It is difficult to achieve large-scale production.

[0023] The structure of the main valve core of the precision pressure reducing valve of the present invention is shown in figure 2 , image 3 , comprising a valve stem 1, a connecting sleeve 2, and a steel ball 3, the end of the valve stem is turned with a connecting section 12, the top of the connecting section is turned with a conical shoulder 13, and the middle of the valve stem is turned with a shoulder-shaped step 11. A nitrile rubber layer 14 is vulcanized on the shoulder-shaped step. O...

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Abstract

The invention discloses a main valve element of a precise pressure reducing valve. The main valve element of the precise pressure reducing valve comprises a valve rod, a connecting sleeve and a steel ball. A connection section is turned on the end portion of the valve rod. A conical bearing shoulder is turned on the neck portion of the connection section. A shoulder-shaped step is turned in the middle of the valve rod. A nitrile rubber layer is vulcanized on the shoulder-shaped step. A connection through hole is turned in one end of the connecting sleeve, the end with the connection through hole is connected to the connection section of the valve rod in a pressing mode through interference fit, a bearing hole with the small end portion and a swallow-tail section is turned in the other end of the connecting sleeve, and the steel ball is pressed into the bearing hole through interference fit. The steel ball is a steel ball for a ball bearing. According to the structure of the main valve element, the production technology is simplified and various technical requirements of the main valve element are met.

Description

technical field [0001] The invention relates to the structure and production process of a main valve core of a precision pressure reducing valve. Background technique [0002] Precision pressure reducing valve is a kind of pressure reducing valve with high technical content. At present, domestic success is rare. The main valve core of traditional precision pressure reducing valve adopts integral structure. Because the spherical surface of its end is processed by precision lathe Its smoothness and concentricity requirements are very high. At the same time, due to its complex structure, the vulcanized layer on the second shoulder of the main valve core is also difficult to meet the technical requirements, resulting in a very low processing pass rate of the main valve core, which has become a constraint for precision decompression. The key to the success of the valve. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F16K51/00
Inventor 胡琼洁蒋太定王胜平
Owner ZHEJIANG BLCH PNEUMATIC SCI & TECH
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