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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: 2015-01-07
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, including a valve stem 1, a valve cover 3, and a bracket 10, a packing 2 is arranged between the valve stem and the valve cover, a packing gland 4 is arranged at the upper end of the packing, and the upper end of the packing gland is press-fitted on the pressure Tighten the packing pressing plate 5 on the bolt 6, set the pressing plate disc spring 7 above the packing pressing plate, the nut 9 of the pressing bolt is pressed on the pressing plate disc spring 7, one end of the pressing plate displacement post 17 is connected with the packing pressing plate, and the pressing plate displacement post rod A displacement sensor 14 is arranged near the other end.

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

[0018] The displacement sensor is installed on the sensor fixing frame 15, the sensor fixing frame is connecte...

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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 rod packing loss display device. Background technique [0002] Existing valves with valve stem compression packing devices, including valves such as gate valves, globe valves, plug valves, and plunger valves, can be divided into bolt-fixed compression and spring movable compression to the packing. 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 in high-risk medium working conditions. Contents of the invention [0003] The purpose of the present invention is to provide a valve stem packing loss display device which...

Claims

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Application Information

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