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Ball valve with double radial stem bearings

A radial bearing, double radial technology, applied in the direction of shaft seal, valve detail, valve device, etc., can solve the lack of packing gland radial positioning structure, increase the opening and closing torque, packing gland radial offset, etc. Problems, to achieve the effect of small friction resistance, prevent radial offset, and prevent medium leakage

Inactive Publication Date: 2013-03-06
SHANGHAI KAIGONG VALVE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The valves of these structures lack the radial positioning structure of the packing gland and the bottom. During the assembly process, the packing gland is prone to radial deviation and friction with the valve stem, thereby increasing the opening and closing torque, and the packing is also prone to leakage

Method used

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  • Ball valve with double radial stem bearings
  • Ball valve with double radial stem bearings

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Embodiment

[0023] Such as figure 2 As shown, a ball valve with dual radial bearings on the valve stem, the ball valve includes a valve body 23, a packing gland 26, a valve stem 28, a packing 22, a first valve stem radial bearing 25, and a second valve stem radial bearing 21 And packing gasket 24. The packing gland 26 includes a cover plate and a grill. The cover plate and the grill are integrally arranged. There is a packing culvert on the valve body, and a groove with an inner diameter smaller than the inner diameter of the packing culvert is opened at the bottom of the packing culvert. Glam is inserted into the packing culvert, and the cover plate is connected with the valve body 23 through fasteners 27 . The lower part of the valve stem 28 is connected with the valve body 23, and the upper part of the valve stem 28 passes through the groove, the packing culvert, and the gutter in turn, and then passes through the packing gland 26, and the valve stem 28, the packing culvert, and the ...

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Abstract

The invention relates to a ball valve with double radial stem bearings. The ball valve comprises a valve body, a packing gland, a stem and packing, the packing gland comprises a cover plate and a gland, a packing box and a groove are disposed on the valve body, the gland is inserted into the packing box, the lower portion of the stem is connected with the valve body, and the upper portion of the stem sequentially penetrates through the groove, the packing box and the gland to penetrate out of the packing gland. The stem, the packing box and the gland enclose to form an annular packing cavity, the ball valve further comprises a first radial stem bearing, a second radial stem bearing and two packing gaskets, the first radial stem bearing is sleeved between the gland body and the stem, the second radial stem bearing is sleeved between the groove and the stem, one packing gasket is arranged at the top of the annular packing cavity, and the other packing gasket is arranged at the bottom of the annular packing cavity. Compared with the prior art, the ball valve with the double radial stem bearings has the advantages that the stem can be prevented from radial deflection, jamming and friction with the packing gland, medium leakage of the packing and the packing gaskets can also be prevented, and the like.

Description

technical field [0001] The invention relates to a ball valve, in particular to a ball valve with double radial bearings of a valve stem. Background technique [0002] At present, in the production and design of ball valves, many valves with packing glands are mainly composed of valve body 2, packing gland 3, valve stem 4 and packing 1. These packing gland valves lock the bolts on the packing gland to compress the packing, and there is a gap between the inner hole of the packing gland, the outer diameter of the valve stem and the stuffing hole of the valve body, so that the valve stem may rotate without locking. Dead, and the bolt holes and bolts on the packing gland also have gaps. And the clearance of the valve stem at the bottom of the packing is too large. [0003] The valves of these structures lack the radial positioning structure of the packing gland and the bottom. During the assembly process, the packing gland is prone to radial deviation and friction with the valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/08F16K41/02
Inventor 陈盛和程振龙
Owner SHANGHAI KAIGONG VALVE CO LTD
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