Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
  • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
  • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
  • F16L55/1656—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section materials for flexible liners

Definitions

• the present invention relates to a gas pipe, a water pipe, a sewer pipe, a laying line for a power line, a communication line, and the like, and a lining for a pipe buried mainly underground, such as an oil oil line. More specifically, the present invention relates to a nonwoven fabric having a special shape inside a hermetic tubular woven fabric which has a synthetic resin skin on the outer surface and is inserted into the pipe while being turned upside down by fluid pressure.
• the present invention relates to a lining material for a pipeline, which has a cloth, and has properties such as a repelling property and a form-retaining property of outside water, as well as a singing property required for a conventional lining material. ,
• This method does not require excavation of pipes over the entire length, and can be carried out only by forming manholes only at both ends of the pipe section to be lined. Lining j?
• the work itself can be performed on a long pipeline in a short time, and it can be performed even on a pipeline with many bends. This is an extremely excellent method.
• the lining used in the construction method is made of thin, flexible plastic tubing, woven or non-woven fabric in a tubular shape, and its outer surface is air-tight and water-tight.
• Various materials have been proposed, such as a fibrous lining material formed with a material.
• Japanese Patent Publication No. 55-43890 (British Patent No. 1,449,455) discloses an impermeable membrane on felt and / or fabric and a material made of a flexible foaming agent. A lining material composed of an enclosed flexible resin-absorbing material is disclosed.
• Japanese Patent Publication No. 58-33098 discloses that this impermeable membrane, which is made of a flat web laminate composed of a resin absorbing layer having an impermeable layer on one side, comes to the outside.
• a lining j-forest that has a tubular form, both ends are traversed with a thread, and then the entire suturing surface is covered with a sealing rib or coating, and a method for producing the lining.
• Japanese Patent Application No. 58-1 0236-1 discloses that a tubular woven fabric in which a warp and a weft of synthetic fiber are woven in a tubular form has an internal void inside or outside and has a predetermined thickness. It describes a pipe liner in which a tubular cloth having a high degree of flexibility is laminated and an airtight layer of a synthetic resin is formed on the outer surface thereof.
• the above-mentioned pipe line method is applied to a pipe for transporting a fluid such as a gas pipe, a water pipe, a sewer pipe, and an oil line
• a fluid such as a gas pipe, a water pipe, a sewer pipe, and an oil line
• the lining was required to have no leakage of the transport fluid, flexibility to be able to follow the curved part of the pipeline, strength to withstand the pressure of the internal fluid, durability of the coating, etc.
• the pipe lining method of the above type the lining material has been required to have various characteristics depending on the environment of the pipeline to be applied, the nature of the land, etc. . At present, the following properties are required for lining materials.
• the water resistance and hardness of the adhesive are important for the lining material applied to the pipeline to have external water pressure retention. It is also necessary that this adhesive has a sufficient thickness. Therefore, the lining material is required to include a sufficient amount of adhesive.
• this type of adhesive has been used for epoxy resin and unsaturated. Reester resin, acryl resin, urethane resin, etc. are used, but pipes may be laid in places where groundwater can enter. Therefore, even in water, the curing reaction proceeds without being hindered and achieves adhesion, and even after curing, the adhesive strength is reduced due to the effect of water, and the strength is required. .
• unsaturated polyester resins and acrylic resins that use peroxide as a curing agent may not cure in the presence of water. , I like it. It is also desirable to use a solvent such as styrene monomer. ⁇ Resin-based resin can be cured in water, but it can be cured. '(' Adjustment of the time required for administration is troublesome, and the monomer content is water-soluble. It is also preferable because it can cause environmental pollution, so the adhesive suitable for the lining material used in this type of pipeline is a epoxy resin, and the curing agent is also a medium However, it is preferable to use aromatic or aliphatic ⁇ liamin because it can be hardened even in water.
• the lining material supports the pressure of the fluid when the line breaks, so it must be able to withstand that pressure. Also lining! ? When applying the material to the pipe, it is necessary to turn the material inside out.) The fluid pressure must be sufficient to prevent the lining material from breaking down. I do.
• the conventional lining material described above can satisfy some of these necessary properties, but satisfies all of these properties.
• the nonwoven fabric itself has a small change in strength, and thus lacks seismic isolation, and lacks any measures to ensure the impregnation with the epoxy resin. Due to the non-woven fabric, the internal resistance is low, and any means can be taken to improve the adhesive strength between the resin film and the fibrous layer.
• the lining material described in Japanese Utility Model Application Publication No. 56-3619 and Japanese Patent Application Laid-Open No. Sho 56-8229 is basically made of cloth. Significantly, it is possible to further increase the strength by changing the manufacturing method. Therefore, seismic isolation and internal pressure resistance are large, but it is difficult to increase the thickness of the woven fabric. For general clothing, it is not difficult to obtain a thick one by devising the weave.
• the tubular woven fabric of the lining material is woven in a tubular shape using a circular loom, but the circular loom can form a woven fabric having a complicated structure. As described above, shika must also be woven with great strength and thick, and like a thick garment for clothing, it can be thickened with a core yarn or backing yarn.
• Thick yarn can be used to increase the thickness, but the rigidity of the yarn makes it difficult to turn it over when applying a lining material to a pipeline, and irregularities on the fabric surface Increases the fluid resistance of the fluid to be transported over a large distance. Also, the use of extra thick yarn has a coarse texture, and the adhesive cannot be held by the fabric itself. For this reason, the external water pressure retention is poor, and no consideration has been given to improving the bonding strength between the fiber layer and the resin film.
• Another object of the present invention is to use a tubular woven fabric and a tubular nonwoven fabric as the tubular woven fabric, to impregnate the adhesive, to separate the resin film from the tubular fabric, and to remove the tubular fabric from the tubular fabric.
• Still another object of the present invention is to provide a tubular woven cloth as a tubular cloth.
• a tubular non-woven fabric having a special shape and structure is used inside the tubular cloth to provide a lining material which satisfies all the characteristics required for a lining material for pipelines.
• the present inventors have conducted intensive studies in order to further improve the properties of the lining material described in the specification of No. 58-1 0236, No. 1 in the case of Machiton, and a tube having a resin skin on the outer surface.
• a through hole formed by punching is provided evenly inside the fabric, and a tubular fabric formed by special sewing is introduced.
• the disadvantages of this lining material have been overcome, and we have succeeded in obtaining a lining material that satisfies all the required characteristics.
• a tubular lining material having an adhesive applied to the inner surface is passed through the pipe, and the inside of the pipe is turned upside down by the fluid pressure, and the inside lining is turned upside down.
• the above-mentioned lining used in the method of lining a pipeline, in which the material is bonded to the inner surface of the pipeline with the adhesive interposed between the lining material and the pipeline while the material is pressed against the inner surface of the pipeline.
• the lining material is made of an airtight tubular woven fabric woven in a tubular shape with a synthetic resin film formed on the outer surface, and a substantially uniform punch inserted inside the woven fabric.
• a lining material for a pipeline characterized by being formed of a tubular cloth for impregnating an adhesive with a nonwoven fabric having a formed through hole.
• the non-iron cloth is sufficiently impregnated with an adhesive, for example, an epoxy resin, and the air-tight tubular woven cloth is further passed through the non-iron cloth. Fully impregnate the resin
• the nonwoven fabric and the woven fabric are integrated to increase the strength and improve the seismic isolation.- At the same time, even when external water is added, the tubular fabric and the nonwoven fabric converge. Provide a means for maintaining the original shape.
• a conventional lining material particularly a lining material using a tubular woven fabric or a non-woven fabric described in Japanese Patent Application No. 58-102361, is suitable as an adhesive.
• the non-woven cloth layer functions as a filter, and the adhesive cannot be sufficiently impregnated up to the tubular woven cloth. .
• an excimer resin since it contains a resin component and a filler, a phenomenon occurs in which the filler is filtered by the nonwoven cloth when passing through the nonwoven cloth, and it is necessary to overcome this drawback. was there.
• the non-woven cloth has a large number of pores distributed almost uniformly, so that such separation of the components of the adhesive can be prevented.
• the adhesive-impregnated tubular woven fabric is composed of a single-layer nonwoven fabric or a laminated nonwoven fabric, and its outer diameter is airtight.
• the inner diameter of the airtight tubular cloth is inserted by an appropriate means in a state of being folded in the length direction, which is larger than the inner diameter of the tubular cloth.
• at least the nonwoven fabric used as the tubular woven fabric for impregnating the adhesive has a nonwoven fabric that forms the innermost layer of the nonwoven fabric, and the nonwoven fabric has a strip shape, and both sides in the length direction can be measured. It's a sewing method !?
• This nonwoven fabric is generally formed of synthetic fibers, and the material is It is possible to use Polyamide, Polyester, Acrylic, and Polyurethane. It is particularly preferable to use those manufactured by a conventional method, for example, a dry-sumbon method from the knowledge of the Riestel. Also, is this non-woven cloth 2 to 8 d single? It is desirable that the fabric be insensitive fabric of a riester weft.
• the thickness of the non-woven fabric can be changed depending on the purpose of use, etc., and is particularly limited.However, the thickness is usually 2 to 8, and the non-woven fabric is subjected to hunting or the like. If the hole to be made has the aforementioned thickness, 2 to 8 mm? 5, the hole distribution is preferably such that the shortest distance between the holes is 15 to 60 dragons.
• the airtight tubular woven fabric is lined up, it is the one made of the synthetic fiber described in U.S. Pat. No. 4,334,948 or 4,368,091].
• the outer surface of a tubular woven fabric woven into a tubular shape using weft and weft has a synthetic resin film.
• Polyamide as synthetic fiber, 10? Riestell, Acryl, and Reurethane types can be used, but the use of Boliester type is preferred because of its high strength. .
• a non-extensible entangled long fiber yarn of a polyester fiber or the non-extensible entangled long fiber yarn and a ⁇ ester long iron fiber yarn, a
• the synthetic resin used for the synthetic resin film it is preferable to use a polyester elastomer in consideration of strength, durability, and compatibility with the pig cloth.
• the adhesive used to impregnate the tubular woven fabric is d Xylic adhesives are preferred, and aromatic or aliphatic ⁇ liamin is preferably used as the curing agent.
• FIG. 1 is a partially broken perspective view showing a typical ⁇ of the lining material of the present invention!
• FIG. 2 is a perspective view showing the tubular cloth for adhesive impregnation in FIG. 1
• FIG. 3 is a perspective view showing a form in which the tubular cloth for adhesive impregnation is extended in the circumferential direction.
• FIG. 4 is a plan view showing a cross section of a pipeline to which the lining D material of the present invention is applied.
• FIG. 1 shows the pipe lining according to the present invention! ) Typical aspects of the material
• the material 1 is shown in a cutaway perspective view.
• the material 1 is made up of an airtight tubular woven fabric 2 and a nonwoven fabric 6 made of a tubular woven fabric 4 having a synthetic resin film 3 on its outer surface.
• the tubular woven fabric 5 for adhesive impregnation formed into a tubular shape by sewing with a thread 7 in the longitudinal direction 1, and the tubular woven fabric 5 is inserted into the tubular pig cloth 2.
• the outer diameter of tubular woven fabric 5 is the inner diameter of tubular woven fabric 2! ? Because of its large size, it is folded at the fold 8 in the length direction, and the non-woven fabric 6 has a large number of substantially uniformly distributed through holes 9.
• 3 ⁇ 4 The tubular woven fabric 4 of the tubular woven fabric 2 is formed into a tubular shape by the warp a and the weft 3 ⁇ 4 of synthetic fibers.
• FIG. 2 is a perspective view showing only the tubular woven fabric 5 in FIG. 1]. However, both ends 10 in the longitudinal direction of the non-woven fabric 6 are sewn together by a thread 7 to each other. This is shown in Figure 2.
• the tubular woven fabric 5 In the folded state, the tubular woven fabric 5 has a shape folded at the fold line 8, so that the both ends 10 are tightened by the thread 7 to form a projection.
• FIG. 3 is a perspective view of the tubular fabric 5 when used for the liner of a pipeline] 9. In this case, the fold 8 disappears because the tubular woven fabric 5 is stretched in the circumferential direction. As a result, the cross section is circular, and the projections at both ends 1.0 disappear at that time.
• the composition of the lining material of the present invention will be described more specifically by way of example.
• the lining material of the present invention is applied to a sewage hume pipe having an inner diameter of 300.
• the tubular woven fabric 4 is formed by weaving a warp a and a weft into a tubular shape, and the warp a in this case has a d of 1,000 d (the number of filaments is 288). Twisted 6 non-extensible entangled yarns of Riester filament yarn are used, and 320 of them are aligned and used (total of 640 yarns).
• Tubular An air-tight synthetic resin film 3 is formed on the outer surface of the fabric 4, and this film 3 is generally formed by extruding a colorless polyester resin by an extrusion molding method. J? The outer surface of the tubular woven fabric 4 It is formed by coating directly on the surface. Its thickness is about 0.6 TO] ?, Generally, a thickness of about 0.2 to 1.5 ounces is appropriate. In this way, the airtight tubular fabric 2 is formed. The tubular woven fabric 4 is further shrunk by the treatment by the extruder to form the film 3, and the airtight tubular fabric 2 after the film 3 is formed has a folding width of 40 thighs. there were.
• the through-hole 9 is formed by a perforation process in the stage before the tubular fabric 5 for impregnating the adhesive is sewn into a tube. 'The diameter of the through hole 9 at this time is about 3.5 mm, and the shortest distance between the through holes is about 2.5 cm from the center of the through hole.
• This perforation is performed by completely cutting the fibers of non-woven fabric 6 with a conventional etching machine.
• the nonwoven fabric 6 used at this time was formed to a thickness of about 4 by a conventional method in which a single-filament monofilament of about 5 denier; The basis weight of this non-woven fabric was about 4209-Zm 2 .
• This non-woven fabric is covered with an over-lock type sewing machine so that the lengthwise ends of the non-woven fabric are not overlapped.
• an adhesive-impregnated tubular woven fabric 5 In this overlock, one-lock sewing, two nonwoven fabrics each having a predetermined width are overlapped, the ends are sewn with a sewing width of about 10 mm, and the ⁇ -shaped cloth 5 is stretched in the circumferential direction. In this case, both ends are joined and do not overlap each other. Fold this tubular real cloth! ) The width was about 460 mm.
• This tubular cloth 5 is then inserted inside the tubular cloth 2 by an appropriate method.
• the lining material 1 in this state is j? As shown in Fig. 1.
• the adhesive it is preferable to use the above-mentioned aromatic ⁇ liamine as a curing agent. More specifically, in this example, the main agent is eh. Screw-type eho?
• the curing agent is a modified aromatic polyamine, and the mixed viscosity is 5,000 cps (B type reclaiming viscometer according to paragraphs 6 and 3 of JI SK 6833). Measured at). Calcium carbonate was used as the filler.
• This adhesive was applied to the inner surface of the lining material in an amount of about 6 / m 2 . Lining with glue applied! The material is then inserted into the pipeline by turning it upside down at fluid pressure by a suitable method known in the art, for example, the reversing lining method described in US Pat. No. 4,334,943. Then, the adhesive is cured by heating with steam or the like. In this case, the pressure required for turning over was 0.8 / en in this example. In this way, the lining 1 was applied to the inner surface of the fume pipe.
• Fig. 4 is lining like this! The cross section of the fume line is shown.
• An adhesive layer 11 is provided on the inner surface of the fume tube 10, and a tubular woven fabric 5 and a tubular woven fabric 2 integrally bonded to the adhesive are located thereon.
• the synthetic resin film forms the innermost layer of the lining material.
• the lining material of the present invention] 5 material has a tubular woven fabric and has sufficient strength in the longitudinal direction, so that it exhibits seismic isolation. In the seismic isolation test, a 300-millimeter hume pipe of 1 m length was simply joined together, and the specimen with the lining material attached was used as a test specimen.A tensile load was applied to both ends of the specimen.
• the liner was about 9 ton], and the 9 pieces came off the hume tube.
• the tensile load was 10.5 ton.
• cracks occurred in the hume tube in the direction.
• the inner lining that peeled off from the tube was not damaged and formed a hard eve. Therefore, even if the pipeline is damaged due to an earthquake or the like, the pipes and the lining will be conical, and the lining will be stretched slightly, thereby absorbing energy.
• the inner lining material alone can sufficiently secure a fluid passage without breaking the lining material.
• the through-holes are uniformly distributed in the pipe 5 and the cloth 5 is provided in a large number, not only the cloth and the non-woven cloth with the adhesive, but also the pipe through these holes.
• Fabric 2 is also impregnated with a large amount of adhesive.
• the presence of this through hole eliminates the above-mentioned filtration phenomenon of the immortalized cloth, and the adhesive component is homogeneously tubular. It has the advantage of being supplied to cloth 2. Accordingly, when the tubular woven fabric 2 and the tubular woven fabric 5 are hardened after being applied to the pipe, they can be integrally bonded to each other to form a thick layer. In this way, there is a through hole.]?
• a thick fibrous layer is impregnated with a large amount of adhesive, and a rigid pipe is lined with the lining material lined in the pipe line. It can be formed in the entanglement and the lining material will be crushed even if there is already a hole in the pipeline or if there is a new hole and groundwater has entered. As a result, the above-mentioned external water E shape retention can be secured.
• the thickness force is preferably s 2 to 8 m. If the thickness is smaller than 2 females, it is not sufficient to secure the thickness, and if it is larger than 8, the tubular woven fabric 5 is not uniformly impregnated with the adhesive.
• the non-fiber fabric is formed by dry-bonding using a 2 to 8 denier '''reestar fibrous weft thread as the tubular cloth 5. It is suitable because of its excellent impregnation and strength. To form the through-holes, it is necessary to use the Thomson's multi-machine method. 1) Cutting the fiber completely and opening it will reduce the permeability and impregnation of the adhesive. It is preferred because it is excellent.
• the through holes have a size of about 2 to 8 ⁇ ⁇ , and the shortest distance between the through holes is about 1.5 to 6 OTI, so that the holes are formed uniformly over the entire surface. If the through-holes are too small] or too large, the effect of impregnating the tubular woven fabric 2 with the adhesive is small. Also, if the perforations are too large or too small, the strength of the lining material may be reduced. By providing additional holes? On the other hand, the peel strength between the tubular woven fabric and the tubular non-iron fabric is increased, and the integration of the tubular cut fabric and the tubular nonwoven fabric is promoted.
• the layer thickness of the non-woven fabric should be increased. Since the real world increases in order to increase the number of layers, it is preferable to make the nonwoven fabric double or triple multilayer.
• each nonwoven fabric layer is set to 2 to 8 baskets, and a through hole is formed in each layer. Furthermore, because of the perforations, the impregnation of the non-woven fabric with the adhesive is sufficient.
• the folded width of the airtight tubular woven fabric is
• the inner width of the tubular woven fabric for impregnating the adhesive is 60 plates (293 fiber in outer diameter, and air pressure is 0.5 / c after reversal) Since the outer diameter reaches approximately 300 mm 5 at about z , both the airtight tubular woven fabric and the tubular damp fabric for impregnating the adhesive can be lined without any gaps.
• the reason why the expandability is good is that the first fold width of the airtight tubular woven fabric is 490 m (approximately ⁇ 2 plates ⁇ ) in which the heat treatment is performed.]?
• the inner diameter of the pipe is increased by force. ??
• the diameter of the tubular woven fabric is air-tight and the diameter of the fabric is also large. Furthermore, the diameter of the tubular cloth for the adhesive impregnation is larger than the diameter of the airtight tubular cloth. It is very flexible and keeps the lining material upside down! The fluid pressure of the festival can be kept low.
• the tubular insulated cloth is formed in multiple layers to secure the thickness, it is possible to sew only the innermost layer to cause heavy damage to the intermediate layer. If the innermost layer is sewn, it is preferable because the nonwoven fabric will be displaced when the lining material is re-tilled, which may cause the generation of seams.
• the diameter of the non-woven cloth layer is larger than the diameter of the airtight tubular woven cloth, and the larger the diameter of the non-woven cloth is located in the inner layer. This is desirable because the lining material can easily be turned over. However, it is necessary to keep them all slightly smaller than the pipe diameter.
• the separation strength between the outer surface of the synthetic resin film and the tubular woven fabric can be improved.
• the adhesion separation strength (180 degree separation) between the tubular fabric and the synthetic resin film is about] It is 0 cm, which is about 5 to 10 mm in strength compared to the case of using a steel wire of all lengths of about 1 to 2 Zcm.
• the film is less likely to be grown.
• This phenomenon is due to the fact that the non-extensible entangled long fiber yarn is bulky.
• the resin forming the film penetrates into the non-extensible entangled long weft thread to achieve an anchor fruit, and the thread escapes because it is a long iron weft thread.
• the separation strength * is improved.
• the non-extensible entangled long fiber yarn does not need to be used for both the warp yarn and the long yarn, but the non-extensible entangled long fiber yarn and the ordinary long fiber yarn or short fiber yarn are used. The effect can be exhibited even if it is mixed and twisted.
• the non-extensible entangled filaments are crimped under wet heat such as steam, whereas ordinary wool-yarns are crimped under dry heat.
• the thread in the rolled state is fixed at a high temperature to reduce elongation. Therefore, it is a yarn with a shape very similar to a regular wool yarn, but has an elongation of 20% or less and high strength. It is desirable to use vestile fibers for the displacement of woven cloth and non-woven cloth in terms of strength. Polyester is also excellent in chemical resistance and abrasion resistance, and is desirable because durability is added. Similarly, synthetic resin skin!
• the resin to be used enormously is a ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ . ⁇ . If the coating is used without coloring, the resin itself will be transparent, so it will be necessary to check from the outside whether the adhesive has passed through the non-woven cloth and impregnated into the mesh of the tubular woven cloth. This is advantageous because it allows observation.
• the lining material of the present invention is soft because it has excellent seismic isolation and water pressure retention in addition to the characteristics of the conventional lining forest.
• ⁇ ⁇ Suitable for reinforcing pipes buried in land or landfills. Also gas pipelines and oil c. It can be used to reinforce various pipelines such as electric lines, water pipes, sewage pipes, and underground power cables.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Priority Applications (3)

Applications Claiming Priority (1)

Publications (1)

Family

ID=13874481

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (3)

• 1986
  • 1986-06-30 WO PCT/JP1986/000336 patent/WO1988000133A1/ja unknown
  • 1986-06-30 DE DE19863690685 patent/DE3690685T1/de not_active Withdrawn
• 1987
  • 1987-08-28 NO NO87873635A patent/NO873635L/no unknown

Patent Citations (3)

Also Published As

Similar Documents

Legal Events