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Sealing structure and sealing method thereof

A sealing structure and sealing cover technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of poor sealing effect, inconvenient operation during installation and unloading, and difficulty in setting instrument interfaces, etc., to achieve good sealing performance, The effect of simple structure and convenient operation

Inactive Publication Date: 2015-01-07
SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The sealing methods in the prior art, such as directly sealing the large-diameter end face, have poor sealing effect, inconvenient operation when installing and uninstalling, and difficult to install instrument interfaces, etc.

Method used

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  • Sealing structure and sealing method thereof
  • Sealing structure and sealing method thereof
  • Sealing structure and sealing method thereof

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Embodiment Construction

[0043] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0044] like figure 1 and figure 2 , combined with Figure 6 , Figure 7 As shown, a sealing structure is used to seal the joint 10 of the combined Venturi tube. For example, the joint 10 of the combined Venturi tube contains 7 Venturi tubes 1 inside, 1 in the middle, and 6 coaxial and uniformly distributed on the outer ring. , the bottom nozzle of the Venturi tube 1 is flush with the bottom nozzle of the connecting pipe 10, the top nozzle of the Venturi tube 1 is lower than the top nozzle of the connecting pipe 10, the sealing structure includes: 6 tie rods 2, as positioning and receiving The force structure is arranged in the connecting pipe 10, corresponding to the 6 Venturi tubes 1 on the outer ring, the upper end of which is flush with the top nozzle of the connecting pipe 10, and a plurality of pull rods...

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Abstract

The invention discloses a sealing structure for sealing a connecting tube of combined venturi tubes. The inner lower portion of the connecting tube is uniformly distributed with a plurality of venturi tubes, bottom openings of the venturi tubes are level and parallel to a bottom opening of the connecting tube, and top openings of the venturi tubes are lower than a top opening of the connecting tube. The sealing structure is characterized by comprising a plurality of pull rods which are arranged in the connecting tube and parallel to the axis of the connecting tube, a sealing cover arranged at the top opening of the connecting tube, a ball valve which is arranged at the center of the sealing cover and comprises a ball valve door for primary sealing and a ball valve plug for secondary sealing, and an O-shaped sealing ring arranged between the sealing cover and the top opening of the connecting tube, wherein the upper end portions of the plurality of pull rods are level and parallel to the top opening of the connecting tube and every pull rod is connected with the sealing cover through a screw. The invention further discloses a sealing method. The sealing structure has the advantages of being good in sealing performance, easy to assemble and disassemble, safe, reliable and wide in application range and can be provided with connectors, such as a nitrogen charge connector.

Description

technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a sealing structure and a sealing method for a joint of a venturi tube when boilers, steam generators and heat exchange equipment are charged with nitrogen and maintained at low pressure. Background technique [0002] The steam generator needs to be filled with nitrogen for protection during storage and transportation. First vacuumize and fill the equipment with nitrogen after the dew point meets the requirements to maintain a positive pressure of 0.03MPa to 0.07MPa. The combined Venturi nozzle can not be sealed by welding and sealing because the outer groove has been processed, and it is usually sealed by a mechanical seal. [0003] The sealing methods in the prior art, such as directly sealing the large-diameter end face, have poor sealing effect, inconvenient operation during installation and unloading, and difficulty in setting instrument interfaces. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/06
CPCF16J15/061F16J15/062
Inventor 袁骞王翔秦列辉杨佑春
Owner SHANGHAI ELECTRIC NUCLEAR POWER EQUIP CO LTD
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