All-closed nuclear drum vacuum valve main shaft sealing structure

A fully-enclosed, spindle-sealing technology, which is applied to engine seals, engine components, mechanical equipment, etc., can solve problems that cannot meet the needs of large-diameter drum seals, and achieve the effect of safe and reliable sealing structure and optimized design

Inactive Publication Date: 2017-12-08
中核第七研究设计院有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

With the expansion of the separation work of the cascade system, the caliber of the nuclear vacuum valve is also increasing. The traditional sealing structure can no longer meet the sealing of the main shaft of the large-diameter rotary drum vacuum valve. It is necessary to develop a new sealing structure to ensure the rotary drum vacuum valve. seal at the shaft

Method used

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  • All-closed nuclear drum vacuum valve main shaft sealing structure

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Such as figure 1 As shown, the fully enclosed nuclear drum vacuum valve spindle sealing structure of the present invention includes, bolt A2, lower sealing ring 4, diaphragm 5, sealing ring 7, bolt B8, upper sealing ring 10, and a large nut 12. Clamp 13, lip seal ring 15, matching disc spring group 16, nut 17, rubber bowl 18;

[0014] The lower sealing ring 4 is fixed between the pressure plate 1 and the assembly cover 6 by the bolt A2; the sealing ring 7 is fixed between the shell 9 and the assembly cover 6 by the bolt B8; the main shaft 3 is pressed on the lower sealing ring 4; Pressure welding, connecting the shell 9 and the support 14; the upper sealing ring 10 is installed between the support 14 and the main shaft 3; the lip seal ring 15 is installed between the sleeve 11 and the main shaft 3; On the top of the sleeve 11; the nu...

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Abstract

The invention belongs to the technical field of nuclear vacuum valves, and in particular relates to a fully-enclosed main shaft sealing structure of nuclear rotary drum vacuum valves. The lower sealing ring is fixed between the pressure plate and the assembly cover; the sealing ring is fixed between the shell and the assembly cover; the main shaft is pressed on the lower sealing ring; the diaphragm is welded between the connecting shell and the support; the upper sealing ring is installed on the support Between the seat and the main shaft; the lip seal ring is installed between the sleeve and the main shaft; the matching disc spring group is pressed above the sleeve; the nut is installed above the matching disc spring group; one end of the rubber bowl is fixed on the main shaft through a clamp The other end is fixed on the housing by a large nut. The invention adopts five sealing structures, which fully guarantee the sealing of the main shaft part of the valve. At the same time, the rubber bowl is used to transform the dynamic sealing into static sealing, the design is optimized, and the sealing structure is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of nuclear vacuum valves, and in particular relates to a fully-enclosed main shaft sealing structure of nuclear rotary drum vacuum valves. Background technique [0002] Nuclear vacuum valves are mainly used to cut off and circulate gaseous materials in cascaded unit systems and inter-unit systems. Due to the high hazard and high price of materials, the valves are required to have high sealing performance. In the past, the valve sealing structure mainly used the traditional packing seal, which can only meet the sealing of small-diameter valves. With the expansion of the separation work of the cascade system, the caliber of the nuclear vacuum valve is also increasing. The traditional sealing structure can no longer meet the sealing of the main shaft of the large-diameter rotary drum vacuum valve. It is necessary to develop a new sealing structure to ensure the rotary drum vacuum valve. Seal at the shaft. Co...

Claims

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Application Information

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IPC IPC(8): F16J15/3232F16J15/34
CPCF16J15/3232F16J15/3452
Inventor 薛光磊刘洋殷亚芳吴刚范国伟罗玉英
Owner 中核第七研究设计院有限公司
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