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Conduit rehabilitation pipe

A technology for regenerating pipes and pipes, which is applied in the direction of pipe laying and maintenance, hoses, pipes/pipe joints/fittings, etc., and can solve problems such as difficult handling and time-consuming work

Inactive Publication Date: 2014-10-22
KANA FURETSUKUSU KOOHOREESHON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned pipe making method, dedicated construction equipment such as a pipe making machine is required, and skilled workers are required for this construction.
In addition, on the other hand, although the above-mentioned casing construction method does not require a pipe making machine, it is manufactured as a large pipe body in advance, so it is not easy to handle in a narrow access hole.
Moreover, both construction methods require connection work to realize the pipe body within the existing pipe, and there is also a problem that a considerable amount of work time must be spent in order to improve the sealing performance of the connection part.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0143] As the material of the lower side soft resin layer 5d, a mixture of LLDPE and EVA (ethylene vinyl acetate copolymer) is used, and as a material of the upper side soft resin layer 5e, a mixture of SEBS and PP is used, and they are respectively extruded into The tape shape is wound spirally (so that the edges overlap) sequentially around a substantially cylindrical core to form the lower soft resin layer 5d and the upper soft resin layer 5e . Next, use PPS as the hard resin, extrude it into rods having various substantially rectangular cross-sections with different heights and widths as the core material 5g, and use the same resin material as that of the upper soft resin layer 5e. Wrap to form the core material covering part 5f (thickness about 1mm), and the protrusion part 5c thus obtained is spirally wound on the outer surface of the above-mentioned upper side soft resin layer 5e (in other words, the outer surface of the straight pipe part 5b). ). Various regenerated p...

manufacture example 2

[0159] In the same manner as above, PPE was used instead of PPS, and regeneration pipe samples E to H having a nominal diameter of 250 mm were produced. Calculate the core height H, core width W, and spacing P relative to the inner diameter D based on the measured values ​​of each sample i Each ratio of the core width W, pitch P relative to the core area (the product of the core height H and the core width W), the core height H, and the thickness T of the single-layer part 2s Relative to inner diameter D i of each proportion. In addition, the crushing strength of each sample was measured in the same manner as above, and the tensile strength was measured as follows. The results are shown in Table 5.

[0160] ·Tensile Strength

[0161] The tensile strength (N / 10mm) was measured according to "JIS K 7161".

[0162] [table 5]

[0163]

[0164] It is understood that even when PPE is used instead of PPS, the crushing strength of the regenerated pipe shows the height H from t...

manufacture example 3

[0168] In the same manner as above, a regeneration pipe sample having a nominal diameter of 250 mm was produced by setting the pitch P of the protrusions 5 c to 25 mm, and using PPS as the hard resin constituting the core material of the protrusions. Find the thickness T of the single-layer part 2s Relative to each sample inner diameter D i , and the tensile strength of each sample was determined as described above. The results are shown in Table 6.

[0169] [Table 6]

[0170]

[0171] From the above results, it became clear that in Production Example 3, as in Production Example 2, the thickness T of the single layer portion 2s Relative to regeneration tube inner diameter D i The ratio (%) becomes larger, and the tensile strength shows a tendency to increase ( Figure 15 ).

[0172]

[0173] The regenerated pipe samples obtained in Manufacturing Example 2 and Manufacturing Example 3 were bent at 90°, and the damage occurred on the outer peripheral portion outside th...

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Abstract

The purpose of the present invention is to not only ensure desired flat strength in a conduit rehabilitation pipe, but also to prevent tearing and wrinkling that may occur in a conduit rehabilitation pipe during drawing work. Provided is a conduit rehabilitation pipe characterized in comprising a lower-side soft resin layer (5d) constituting an inner layer of a straight pipe part (5b), an upper-side soft resin layer (5e) layered on the outer side of the lower-side soft resin layer (5d) and constituting an outer layer of the straight tube part, and a ridge part (5c) formed in a spiral shape on the outer surface of the upper-side soft resin layer (5e). The ridge part (5c) is composed of a core material (5g) made of hard resin wound in a spiral shape, and a core material coating part (5f) integrated with the upper-side soft resin layer (5e) in state enclosing the core material. The core material (5g) has a height that is 3.5% to 5% of the inside diameter of the straight pipe part (5b). The lower-side soft resin layer (5d) is formed by winding so as to include at least a single layer portion (5ds). The single layer portion (5ds) has a height that is 0.25% to 0.65% of the inside diameter of the straight pipe part (5b).

Description

technical field [0001] The present invention relates to a pipe regenerating pipe which is inserted into various pipes such as sewer pipes buried in the ground and has deteriorated to regenerate the pipes. Background technique [0002] If the sewer pipe buried in the soil and experienced aging over a long period of time leads to a reduction in the bearing capacity and water-stopping capacity, problems of road collapse or flow-down capacity will arise. [0003] As a method of solving this problem, a drainpipe repair method is proposed and carried out in which an aged sewer pipe or the like is used as a support, and a new resin pipe is inserted or formed inside as a drainpipe. [0004] Among the various drainage pipe repair methods that exist, for example, the pipe-making method has a method in which a strip-shaped hard vinyl chloride material is supplied into the manhole (manhole), and the strip-shaped hard vinyl chloride material is supplied at the entrance portion of the pip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/08F16L1/00F16L11/11F16L55/18
CPCB32B1/08F16L55/1652F16L55/1656B32B27/08B32B27/32B32B2270/00B32B2274/00B32B2597/00
Inventor 金尾茂树
Owner KANA FURETSUKUSU KOOHOREESHON
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