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High-temp. high-pressure valve rod active seal mechanism and gate valve adopting said seal mechanism

An active sealing, high temperature and high pressure technology, applied to shaft seals, engine components, sliding valves, etc., can solve problems such as poor sealing and easy leakage of media, and achieve the effect of improving the sealing effect, improving the sealing effect, and increasing the sealing specific pressure

Inactive Publication Date: 2003-12-10
HUADONG VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defect that the valve stem of the existing gate valve and other shut-off valves is poorly sealed under high temperature and high pressure and the medium is easy to leak, the present invention provides an active sealing mechanism for a high temperature and high pressure valve stem, and a gate valve using this sealing mechanism, This sealing mechanism adopts an active sealing method, which improves the sealing effect of the valve stem under high temperature and high pressure. Under high temperature and high pressure, the gate valve using this valve stem sealing mechanism will not have the phenomenon of medium leakage from the side of the valve stem.

Method used

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  • High-temp. high-pressure valve rod active seal mechanism and gate valve adopting said seal mechanism
  • High-temp. high-pressure valve rod active seal mechanism and gate valve adopting said seal mechanism

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Embodiment Construction

[0013] see figure 1 , the high temperature and high pressure valve stem active sealing mechanism provided by the present invention includes a valve cover 9, the valve cover 9 is provided with a stuffing box opening to the inner cavity of the valve body, in the stuffing box there are arranged several tightly pressed together from top to bottom. Layer packing 8, packing pad 2 and compression nut 4, the middle of described bonnet 9, packing 8, packing pad 2 and compression nut 4 are all provided with holes, and these holes are connected to each other to form the stem hole of this mechanism.

[0014] The packing pad 2 can be in the shape of a disc with unequal diameters up and down, and the diameter of its lower part is larger than that of the upper part. correspond.

[0015] The compression nut 4 may be provided with several axial through holes 7, and its upper surface may also be provided with an annular groove connected with the through holes.

[0016] Said compression nut 4 ...

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Abstract

The present invention relates to a high-temp. high-pressure valve rod action sealing mechanism and a gate valve made up by adopting said sealing mechanism. The valve cover of said sealing mechanism has the packing chamber whose opening is directed towards the internal cavity of the valve body, in the packing chamber there are successively placed several layers of packing material, packing pad and packing nut from top to bottom, the valve rod can be passed through the valve rod hole of the centre of said mechanism, on end is connected with gate board and its another end of is connected with hand wheel, the packing material and packing pad are tightly combined together by means of packing nut.

Description

technical field [0001] The invention relates to a valve stem sealing mechanism of a valve, in particular to a valve stem sealing mechanism suitable for gate valve stem sealing under high temperature and high pressure and a gate valve adopting the sealing mechanism. Background technique [0002] Gate valves and other cut-off valves are mainly used to cut off or connect the fluid medium in the pipeline. The sealing between the valve stem and the valve body (or bonnet) of the existing valves of this type adopts forced sealing technology, and its sealing mechanism mainly includes valves. Cover, stuffing, gland and other components, wherein the valve cover is provided with a stuffing box with an opening upward, the stuffing is located in the stuffing box, the gland is pressed on the top of the stuffing, the bonnet, stuffing and gland There are holes in the middle, and the holes are connected with each other to form the valve stem hole of the mechanism. The valve stem of the valve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K3/02F16K41/02
Inventor 宁庭海金公元许一攀夏福荣
Owner HUADONG VALVE
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