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Valve packing sealing structure

A technology for packing seals and valves, applied in shaft seals, valve details, valve devices, etc., can solve problems such as poor packing sealing performance and affect valve sealing reliability, and achieve simple structure, good sealing performance, and increased deformation Effect

Active Publication Date: 2019-04-09
建湖县坤腾机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing packing structure generally has poor sealing performance of the packing, which affects the reliability of the valve seal.

Method used

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] A valve packing sealing structure, including a valve body 1, a valve stem 2, a valve cover 3, a gland 4, and a packing assembly 5;

[0036] The upper end of the valve body 1 is provided with a first flange 6, the lower end of the valve cover 3 is provided with a second flange 7, the fastener passes through the first flange 6 and the second flange 7, and the valve is threaded. Body 1 and valve cover 3; valve stem 2 passes through valve cover 3 and valve body 1, and valve stem 2 is coaxially arranged with valve cover 3 and valve body 1; a packing chamber 8 is arranged between valve stem 2 and valve body 1, The packing chamber 8 is provided with a packing assembly 5; the packing assembly 5 is sleeved on the valve stem 2; the gland 4 is arranged above the packing assembly 5, and the lower end surface of the gland 4 abuts against the upper en...

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Abstract

The invention provides a valve packing sealing structure. The valve packing sealing structure is simple in structure and good in airtightness; by arranging a scale, the compression amount of a packingassembly is reasonably controlled, and the situations that the packing assembly is compressed insufficiently, and consequentially, a valve medium is leaked in the packing position, or the packing assembly is compressed excessively, consequentially, friction force between a valve rod and packing components is excessively large, and a valve is difficult to open and close are avoided; an upper packing group, an intermediate packing group and a lower packing group form multiple seals, the airtightness of packing is improved, and accordingly, the reliability and airtightness of the valve are improved; through the structures including a first packing ring, a second packing ring and a third packing ring, the sealing reliability is further improved, compression force of a gland in the vertical direction is changed into axial force and radial force by means of ring-shaped inclined surfaces, the deformation of the packing groups is increased, and the packing groups are pressed and attached to the valve rod; and through O-rings in a first ring-shaped protrusion and a second ring-shaped protrusion, the sealing reliability is further improved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a valve packing sealing structure. Background technique [0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that makes or stops the medium in piping and equipment and controls its flow. The valve includes a valve body, a valve core, and a valve stem. In order to ensure that the valve stem of the moving part is sealed in the working state, a packing seal needs to be set between the upper part of the valve body and the valve stem. Packing seal type is a traditional contact seal, its main features are simple structure, easy replacement, low cost and wide application range. The seal between the valve body and the valve stem is often sealed with a bolt-tight stuffing box, that is, after the stuffing is installed in the stuffing chamber, the stuffing is compressed axially by the gland and the bolts. The plasticity...

Claims

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Application Information

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IPC IPC(8): F16K41/02
CPCF16K41/02
Inventor 吴金春
Owner 建湖县坤腾机械有限公司
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