Gland packing

A gland and yarn technology, applied in the field of gland packing, can solve problems such as leakage, adverse effects of flatness, and adverse effects of sealing performance, and achieve the effects of improving sealing performance, improving sealing performance, and increasing the cross angle.

Active Publication Date: 2018-09-28
NIPPON PILLAR PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This protrusion becomes a concave-convex part of the inner peripheral surface, which adversely affects the flatness of the surface that contacts the rod (shaft), and as a result, there is a possibility that leakage may adversely affect the sealing performance.

Method used

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Embodiment approach 1

[0057] The gland packing G of the present invention is as Figure 1 ~ Figure 3 As shown, it is composed of a strip-shaped body 2 formed by weaving a plurality of yarns 1, and is set to have a square cross-section. The direction of the yarn 1 on the cross-section is parallel to the diagonal, and the number of moving paths of the yarn 1 is 4. Furthermore, the intersecting angle α of the yarn 1 exposed on the side surfaces 2a, 2b, 2c, and 2d of the strip-shaped body 2 is woven such that the adjacent side surfaces among the four side surfaces 2a to 2d are different in angle a≠b.

[0058] The structure and cross section of this gland packing G (ribbon 2) are as follows: figure 1 shown. That is, four yarn (knitting yarn) paths w1 to w4 extending in parallel along the diagonals of a square and set to intersect each other (see Figure 5 , 6 ), a plurality of yarns 1 on each path are knitted while moving sequentially in such a manner as to alternately overlap and intersect each ya...

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Abstract

The gland packing is composed of a ribbon-shaped body braided with a plurality of yarns, and is set to have a square cross-section on which the direction of the yarns is parallel to a diagonal line, and the direction of the yarns is The number of moving paths is four, and among them, through further research, the sealing performance was improved as a structure that is less likely to leak. The gland packing G is woven so that the intersection angles (α) of the yarns (1) exposed on the sides (2a-2d) of the strip (2) are adjacent to each other among the four sides (2a-2d). In the state where the sides are different from each other, the intersection angle (α) of the side surface (2c) which becomes the inner peripheral surface among the four side surfaces (2a-2d) is compared with the angle of intersection (α) of the side surfaces (2b, 2d) which become the adjacent side peripheral surface The strip-shaped body (2) is curled so that the crossing angle (α) is large.

Description

technical field [0001] The present invention relates to gland packings used as sealing parts of fluid equipment such as pumps and valves. Background technique [0002] As the gland packing used to prevent leakage from the rotating shaft, a strip-shaped so-called braided packing in which inorganic fibers such as asbestos fibers or glass fibers are woven with various weaving methods and impregnated with a lubricant is often used. etc. or have undergone surface treatment. [0003] In addition, braided packing made of carbon fiber or para-aramid fiber is also mass-produced, and the heat resistance, chemical resistance, and wear resistance of the gland packing have also been greatly improved. As such a conventional example, the invention of patent document 1 or 2 is known. [0004] Among such gland packings, there is a gland packing in which the number of moving paths of the yarn (the number of knitting yarn paths) is four. Specifically, the gland packing is formed of a strip-s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/22
CPCF16J15/182F16J15/22D04C1/12D10B2505/06
Inventor 川崎贵士林洋树片冈幸一
Owner NIPPON PILLAR PACKING CO LTD
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