Stop valve with non-rotating valve rod

A globe valve and valve stem technology, applied in the field of globe valves, can solve the problems of poor valve sealing performance, easy wear and tear of the sealing device, short service life, etc., and achieve the effect of ensuring the integrity of the sealing, prolonging the service life of the valve, and reducing the torsional force.

Inactive Publication Date: 2014-06-11
SUZHOU KEDI FLUID CONTROL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the continuous opening and closing of the valve during operation, the valve stem rotates continuously, driving the valve core to rotate and rise continuously, so the packing and sealing device in the valve are easy to wear, resulting in poor sealing performance and short service life of the valve

Method used

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  • Stop valve with non-rotating valve rod

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Embodiment 1

[0018] Such as figure 1 Shown: a globe valve with non-rotating valve stem, including valve body 1, handwheel 5, valve stem 13, valve stem bushing 11, valve stem nut 10, packing 16, spline bushing 17, back seat 18, Support frame 19, valve core 20 and sealing device 21. A valve stem 13 is arranged inside the valve body 1 , and a valve core 20 is arranged below the valve stem 13 . There is a sealing device 21 between the valve core 20 and the valve body 1 . The top of the valve stem 12 extends out of the valve body 1 and is connected with the valve stem nut 10 . The valve stem nut 10 is connected to the valve body 1 through a valve stem bushing 11 . The valve stem bushing 11 is fixed on the upper end of the valve body 1 . Filling 16 is filled between the valve stem 13 and the valve body 1 . The handwheel 5 is fixed on the upper end of the stem nut 10 . The end of the valve stem 1 is provided with a spline bushing 17 , a back seat 18 and a support frame 19 .

[0019] In ord...

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PUM

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Abstract

The invention discloses a stop valve with a non-rotating valve rod. The stop valve comprises a valve body, a handwheel, the valve rod, a valve rod lining, a valve rod nut, a filler, a spline lining, a rear seat, a supporting frame, a valve core and a sealing device, wherein the valve rod is arranged in the valve body; the valve core is arranged below the valve rod; the sealing device is arranged between the valve core and the valve body; the upper part of the valve rod extends out of the valve body and is connected with the valve rod nut; the valve rod nut is connected with the valve body through the valve rod lining; the valve rod lining is fixed at the upper end of the valve rod; the filler fully fills between the valve rod and the valve body; the handwheel is fixed at the upper end of the valve rod nut; the spline lining, the rear seat and the supporting frame are arranged at the tail end of the valve rod. The stop valve disclosed by the invention can be quickly and easily repaired and maintained; the problem of leakage at a joint or leakage at a welded position is avoided, so that sealing is more complete; by the adoption of a valve-rod valve structure with a spline slot structure, abrasion to the valve rod and the sealing device can be alleviated, the sealing completeness of the stop valve is guaranteed, and the service life of the valve is prolonged.

Description

technical field [0001] The invention relates to a valve structure, in particular to a stop valve with a non-rotating valve stem. Background technique [0002] The most common globe valve currently on the market is mainly composed of valve body, valve stem, bushing, valve cover, packing, valve core, etc. The valve stem is driven to rotate by other pneumatic or electric devices, and the position of the valve stem is raised to open or close the valve. . Due to the continuous opening and closing of the valve during operation, the valve stem is constantly rotating, which drives the valve core to continuously rotate and rise, so the packing and sealing device in the valve are easy to wear, resulting in poor sealing performance and short service life of the valve. Contents of the invention [0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a shut-off valve that is easy to repair and maintain, is not suitable for leakage, has good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/02F16K1/32F16K27/02F16K41/02
CPCF16K1/00F16K1/32F16K27/02F16K41/02
Inventor 田洪卫
Owner SUZHOU KEDI FLUID CONTROL EQUIP
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