Gland packing

A gland and yarn technology, which is applied in the field of gland packing, can solve problems such as adverse effects on flatness, adverse effects on sealing performance, leakage, etc., and achieve the effects of improving sealing, improving sealing performance, and increasing crossing angles

Active Publication Date: 2015-06-10
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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Experimental program
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Embodiment approach 1

[0057] The gland packing G of the present invention is such as Figure 1 ~ Figure 3 As shown, it is composed of a band-shaped body 2 formed by knitting 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 movement paths of the yarn 1 is 4. Furthermore, the crossing angle α of the yarn 1 exposed on the side surfaces 2a, 2b, 2c, and 2d of the belt-shaped body 2 is knitted so that the adjacent side surfaces of the four side surfaces 2a to 2d have different angles a≠b.

[0058] The structure and cross section of this gland packing G (belt 2) are as follows figure 1 Shown. That is, in the four yarn (knitting yarn) paths w1 to w4 (refer to Figure 5 , 6 ), the plurality of yarns 1 on each path are knitted while sequentially moving in such a way that they overlap and cross each yarn 1 on other paths alternately, thereby obtaining a band-shaped body 2 with a square cross section....

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Abstract

A gland packing is braided in a state where, in crossing angles of yarns which are exposed on four side surfaces of a string-like member, crossing angles in adjacent side surfaces of the four side surfaces are different from ch other. The string-like member is looped so that the crossing angle on the side surface in the four side surfaces, the side surface being to function as an inner circumferential surface, is larger than the crossing angles on side surfaces which are to function as side circumferential surfaces adjacent to the inner circumferential surface.

Description

Technical field [0001] The present invention relates to a gland packing used as a sealing component of fluid equipment such as pumps and valves. Background technique [0002] As a gland packing used to prevent leakage from a rotating shaft, a band-shaped so-called braided packing is often used. The braided packing weaves inorganic fibers such as asbestos fibers or glass fibers by various weaving methods and impregnates them with a lubricant. Wait or have surface treatment. [0003] In addition, braided fillers using carbon fibers or para-aramid fibers as raw materials are also produced in large quantities, and the characteristics of the gland fillers such as heat resistance, chemical resistance, and abrasion resistance have also been greatly improved. As such a conventional example, the invention of Patent Document 1 or 2 is known. [0004] In this type of gland packing, there is a gland packing in which the number of yarn movement paths (the number of knitting yarn paths) is 4. Sp...

Claims

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Application Information

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Patent Type & Authority Applications(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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