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Valve rod packing loss display device

A display device, valve stem packing technology, applied in the direction of valve device, valve details, shaft seal, etc., can solve the problems of valve safety hazards, leakage, no packing loss status diagnosis function, etc., and achieve the effect of reasonable structure

Active Publication Date: 2012-10-24
NANTONG HIGH & HIGH PRESSURE VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the fixed compression method, after the packing is lost, if the packing is not pressed in time, leakage will occur at the joint between the valve stem and the packing, and the spring-loaded movable compression packing can compensate for the loss of the packing, but leakage will occur when the loss reaches a certain level. Neither of the two compression methods has the function of diagnosing packing loss, which brings potential safety hazards to valves with high-risk medium conditions.

Method used

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  • Valve rod packing loss display device
  • Valve rod packing loss display device
  • Valve rod packing loss display device

Examples

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Embodiment Construction

[0016] A valve stem packing loss display device includes a valve stem 1, a bonnet 3, and a bracket 10. A packing 2 is arranged between the valve stem and the bonnet, a packing sleeve 4 is arranged on the upper end of the packing, and the upper end of the packing sleeve is press-fitted and sleeved in the pressure Tighten the packing pressure plate 5 on the bolt 6, a pressure plate disc spring 7 is set above the packing pressure plate, the nut 9 of the pressure bolt is pressed against the pressure plate disc spring 7, one end of the pressure plate displacement rod 17 is connected with the packing pressure plate, and the pressure plate displacement connection rod A displacement sensor 14 is provided near the other end.

[0017] There are two upper and lower displacement sensors, which are respectively arranged on the upper and lower sides of the displacement post of the pressure plate.

[0018] The displacement sensor is mounted on the sensor fixing frame 15, the sensor fixing frame i...

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Abstract

The invention relates to a valve rod packing loss display device which is reasonable in structure, capable of accurately measuring packing loss quantity and applicable to valves with dynamic sealing valve rod packing, such as gate valves, check valves, ball valves, plug valves and plunger valves. When a spring loaded moving press plate displaces along with packing loss, a fixed micro stroke sensor can timely measure packing loss quantity, and a double moving loading system enables the moving press plate to still keep the sealing performance when displacing to the loss limit.

Description

Technical field [0001] The invention relates to a valve stem packing loss display device. Background technique [0002] Existing valves with valve stem compression packing devices include gate valves, stop valves, plug valves, plunger valves and other valves. The packing methods can be divided into bolt fixing compression and spring movable compression. After the packing is worn out, if the packing is not pressed in time by the fixed compression method, the valve stem and the packing will leak. The spring-loaded movable compression packing can compensate for the packing loss, but leakage will occur to a certain extent. Both compression methods have no packing loss diagnosis function, which brings safety hazards to the valves under high-risk medium conditions. Summary of the invention [0003] The purpose of the present invention is to provide a valve stem packing loss display device with reasonable structure and capable of accurately measuring the packing loss. [0004] The techni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K37/00F16K41/02
Inventor 陈崇南
Owner NANTONG HIGH & HIGH PRESSURE VALVE CO LTD