Valve rod sealing structure capable of being maintained with voltage

A technology of sealing structure and valve stem, which is applied in the direction of shaft seal, sliding valve, valve details, etc., can solve the problems of heavy maintenance workload, inability to replace packing, and increased operating torque, so as to quickly eliminate leakage and facilitate the replacement of seals Circle operation, reduce the effect of valve operating torque

Active Publication Date: 2012-07-25
SHANGHAI KARON VALVES MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high compression force of the packing leads to the increase of the operating torque, and the frequent tightening of the packing results in a large maintenance workload. The packing can only be replaced when the valve is fully open and there is no pressure. In many emergency situations, such as the medium in the pipeline cannot be stopped. , The valve is fully closed or the opening in the middle cannot be changed, and the operation of packing replacement will not be possible

Method used

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  • Valve rod sealing structure capable of being maintained with voltage
  • Valve rod sealing structure capable of being maintained with voltage
  • Valve rod sealing structure capable of being maintained with voltage

Examples

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Embodiment

[0019] like figure 2 As shown, a valve stem sealing structure that can be maintained under pressure, the structure includes a valve cover 1, a gland 5, a valve stem 6, a dust retaining ring 7, a first sealing ring 8, a second sealing ring 9, a third sealing ring Circle 10, flashboard 11. The gland 5 holds the dust shield ring 7 , the first sealing ring 8 , the second sealing ring 9 , the snap ring 4 and the valve stem 6 , and is fixed on the valve cover 1 by bolts 3 . The dust retaining ring 7 is arranged on the top between the valve stem 6 and the gland 5 . The first sealing ring 8 and the second sealing ring 9 are O-shaped rubber sealing rings, forming two seals between the valve stem 6 and the gland 5 . The third sealing ring 10 is a V-shaped rubber sealing ring, which forms an upper seal between the valve stem 6 and the valve cover 1 . The push ring 2 and the snap ring 4 are left and right symmetrical rings cut from the middle, and can be stuck on the valve stem 6 . T...

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PUM

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Abstract

The invention relates to a valve rod sealing structure capable of being maintained with voltage. The structure comprises a valve cover, a gland, a thrust ring, a snap ring, a valve rod, a dust blocking ring, a first sealing ring, a second sealing ring, a third sealing ring and a gate, wherein the dust blocking ring, the first sealing ring, the second sealing ring, the snap ring and the valve rod are fixed inside the gland through bolts; the dust blocking ring is arranged on the top between the valve rod and the gland; the first sealing ring and the second sealing ring form double seals between the valve rod and the gland; and the third sealing ring forms an upper seal between the valve rod and the gland. Compared with the prior art, the valve rod sealing structure has the advantages that:the operating torque is smaller, filler adjusting workload is reduced, and the fillers can be changed at any time in case of emergency.

Description

technical field [0001] The invention relates to a sealing structure of a valve stem, in particular to a sealing structure of a valve stem which can be maintained under pressure. Background technique [0002] The stem seal is the most prone to "running, popping, dripping, and leaking" in the valve. The existing valve stem mostly adopts the sealing form of packing packing, see figure 1 . The high compression force of the packing leads to the increase of the operating torque, and the frequent tightening of the packing results in a large maintenance workload. The packing can only be replaced when the valve is fully open and there is no pressure. In many emergency situations, such as the medium in the pipeline cannot be stopped. 1. If the valve is fully closed or the opening in the middle cannot be changed, the operation of packing replacement will not be possible. Contents of the invention [0003] The object of the present invention is to provide a pressure-maintainable va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K41/02F16K3/02
Inventor 韩安伟李政宏
Owner SHANGHAI KARON VALVES MACHINERY
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