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Yarn and gland packing

A yarn and gland technology, applied in yarn, engine sealing, textile and papermaking, etc., can solve the problems of reduced sealing performance of expanded graphite, unsatisfactory, and the minimum bending radius of yarn cannot be sufficiently small, and achieve good sealing performance, avoid the effect of reducing the sealing performance

Active Publication Date: 2008-11-05
NIPPON PILLAR PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cause of this problem is that the minimum bending radius of the yarn cannot be sufficiently small.
[0007] Therefore, when twisting or weaving a plurality of yarns in which a part of the expanded graphite is exposed from between the fiber materials in order to form a gland packing, along with the mutual friction between the yarns, there may be a problem from the fiber material. The bad situation where the expanded graphite exposed between the
If the above problems occur, the sealing performance of the defective part, that is, the part where the expanded graphite falls off, is not ideal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Yarn and gland packing
  • Yarn and gland packing
  • Yarn and gland packing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The yarn of Example 1 was made in the following manner. As the fiber material 2, a heat-resistant Inconel wire (or stainless steel wire, etc.) with a diameter of about 0.1 m is used, and in the tubular member 3 formed by weaving (knitting), a plurality of wires with a thickness of 0.38 mm × a width of 1.0 The fibrous expanded graphite 4 having a rectangular cross-sectional shape of mm and a length of about 200 mm is pressed and filled with its ends shifted by 20 mm from each other to form a yarn 1 with a circular (circular) cross-sectional shape. In the first yarn 1 of Example 1, the aspect ratio h of the section of the fibrous expanded graphite 4 is h=1.0 / 0.38≈2.63, and the weight of the first yarn 1 is 5 g / m.

[0040] figure 2 Gland packing 5 made using yarn 1 of Example 1 is shown in . After the gland packing 5 is braided (octagonal braiding) with eight yarns 1 of Example 1, graphite is coated on the surface to make a square gland packing 5 with a cross section of...

Embodiment 2

[0042] The yarn of Example 2 was made in the following manner. The fibrous expanded graphite 4 with a cross-sectional size of 0.38 mm in thickness, 1.0 mm in width, and 200 mm in length is gathered together to form an elongated product by staggering its ends by 30 mm, and the outer periphery of the elongated product is covered with a cylinder Shaped member 3 is covered, thus the cross-sectional shape is circular (circular) yarn 1, and wherein, tubular member 3 is to be woven with the fiber material 2 that is constituted by Inconel heat-resistant alloy wire that wire diameter is 0.1mm. into, made. In the second yarn 1 of Example 2, the aspect ratio h of the fibrous expanded graphite 4 is h=1.0 / 0.38≈2.63, and the weight of the second yarn 1 is 4 g / m.

[0043] After utilizing the yarn 1 of 8 basic embodiments 2 to weave, graphite is coated on its surface, and the gland packing 5 (see figure 2 ).

[0044] For reference, Fig. 7 shows a comparison table of characteristics of the...

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Abstract

A yarn of exfoliated graphite as a base material that is improved so as to have enriched flexibility free from any stick-out of exfoliated graphite at ordinary bending processing, thereby avoiding any partial loss of exfoliated graphite at twisting or braiding operation for preparing of a gland packing. Yarn (1) for gland packing is produced by filling the interior of tubular member (3) obtained by knitting or folding Inconel wire (2) of 0.1 mm diameter with fibrous exfoliated graphite (4) in the form of a fiber with a cross section set so as to exhibit an aspect ratio, being a quotient of width (h=w / t) divided by thickness (t), of 1 to 5.

Description

technical field [0001] The present invention relates to yarns and gland packings, in particular, to yarns used in braided gland packings, tape gaskets, refractory fabrics, etc., and gland packings made of the yarns. Background technique [0002] As prior art related to gland packings used in shaft seals of fluid machines or yarns (braiding threads) used in gland packings, as shown in Patent Document 1 or Patent Document 2, there are known A technology that uses expanded graphite as a base material. In these Patent Documents 1 and 2, it is disclosed that a cylindrical member made of a fiber material by braiding or twisting (knitting or braiding, etc.) is filled with a long sheet of expanded graphite to form a yarn used as a gland packing . In addition, the gland packing is produced by twisting or weaving (for example, octagonal weaving formed by eight braiding threads) using a plurality of yarns formed in the above manner. [0003] The intention of the prior art utilizing ...

Claims

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Application Information

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IPC IPC(8): D04B21/20F16J15/22D04B1/22F16J15/24D04C1/12
CPCD04B1/225D02G3/447F16J15/22D04C1/12D04B1/22D10B2505/06D04C1/04D04C1/06
Inventor 上田隆久
Owner NIPPON PILLAR PACKING CO LTD
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