WO2012042666A1 - 継手付き合成樹脂管およびその接続構造 - Google Patents
継手付き合成樹脂管およびその接続構造 Download PDFInfo
- Publication number
- WO2012042666A1 WO2012042666A1 PCT/JP2010/067256 JP2010067256W WO2012042666A1 WO 2012042666 A1 WO2012042666 A1 WO 2012042666A1 JP 2010067256 W JP2010067256 W JP 2010067256W WO 2012042666 A1 WO2012042666 A1 WO 2012042666A1
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- WIPO (PCT)
- Prior art keywords
- synthetic resin
- resin pipe
- joint
- tube
- pipe
- Prior art date
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Classifications
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- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/065—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket, the sealing rings being placed previously on the male part
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- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
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- 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
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/0036—Joints for corrugated pipes
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- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
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- 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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/28—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses for hoses with one end terminating in a radial flange or collar
Definitions
- the present invention relates to a synthetic resin pipe with a joint applied to a drain pipe under a road, a large drain pipe for sewer, and the connection structure thereof.
- concrete fume pipes are generally used as drain pipes under roads or drain pipes for sewers.
- corrugated synthetic resin pipe specifically, a corrugated synthetic resin pipe is shown in which the main body has a cylindrical shape and a reinforcing convex portion is spirally wound around the outer wall of the main body.
- a water stop material is attached to the spiral groove of the connecting portion, a packing sheet is wound from above, and two halved joints (C-shaped cross section) with flanges are also installed. Cover the connection side end of the synthetic resin pipe in a cylindrical shape and tighten the flanges of each half joint with bolts and nuts.
- connection method requires installation of a caulking material as a water stop material, a water stop block, a packing sheet, a pair of half joints, etc. in the field according to the connection procedure.
- a caulking material as a water stop material, a water stop block, a packing sheet, a pair of half joints, etc. in the field according to the connection procedure.
- the number of parts is large and the management is troublesome.
- the water-stopping material is very easy to peel off, and even if it is firmly bonded, water cannot be completely stopped.
- connection flange needs to be connected with bolts and nuts, which causes a reduction in work efficiency in an environment where work space cannot be secured.
- connection flange is not securely welded to the synthetic resin pipe, it will cause water leakage, and if the connection flange surface is deformed, it will also cause water leakage. Carefully install the connection flange. There must be.
- connection flange is strengthened and the bolts and nuts for connecting the flanges are included, the weight of the connection portion cannot be increased, and therefore there is a limit to cost reduction.
- most of the synthetic resin pipes used for drainage pipes have an inner diameter of 1000 mm or more and are set to a long dimension of about 5 m. For example, they fall when loading / unloading trucks from the loading platform. Doing so has the problem of damaging the ends of the tubes.
- the present invention has been made in consideration of the above circumstances, has a simple structure with a small number of parts, and can provide sufficient water / pressure resistance and good sealing performance without requiring a strong material and high manufacturing accuracy. Accordingly, it is an object of the present invention to provide a synthetic resin pipe with a joint which can be reduced in weight and cost, can be easily handled, and can be easily connected in the field, and its connection structure.
- the synthetic resin pipe with a joint is a synthetic resin pipe provided with a joint for connecting the corrugated synthetic resin pipes to the connection side end of the synthetic resin pipe with corrugation.
- As the joint it has a receiving portion extending in a cylindrical shape from the connection side end of the corrugated synthetic resin tube,
- the gist is that the receiving part is composed of a composite of a foam molded body formed into a cylindrical shape and an FRP layer laminated on at least the outer peripheral surface of the foam molded body.
- tube with a joint which concerns on this invention is the synthetic resin pipe
- the gist is that the synthetic resin tube provided with the insertion port portion is made of a corrugated synthetic resin tube, and an insertion-portion valley filling layer is formed on the connection side end portion to fill and smooth the wave valley portion.
- a spiral type wave in which a wave continuously spirals in the tube axis direction and a ring type wave in which a ring-like wave continues in the tube axis direction at a constant interval. Waves included.
- the receiving portion is composed of a composite of a foam molded body and an FRP layer, it is possible to achieve both weight reduction and high strength of the joint, and at a low cost. Can be produced. Moreover, the joint of a synthetic resin pipe
- connection work can be completed simply by inserting the insertion opening of the other synthetic resin pipe into the reception opening of one synthetic resin pipe.
- the work efficiency can be increased.
- the cylindrical receiving portion wraps the insertion opening portion, sufficient water / pressure resistance and good sealing performance can be obtained without requiring a strong material or high accuracy.
- FIG.2 It is a general view which shows the connection state of the synthetic resin pipe
- (a) is a front view of the opening part of the synthetic resin pipe which concerns on 1st embodiment of this invention
- (b) is a front view of an opening part.
- (A) is an enlarged view of the opening part shown to Fig.2 (a)
- (b) is an enlarged view of the insertion part shown in FIG.2 (b).
- (A) is a front view of the opening part of the synthetic resin pipe which concerns on 2nd embodiment of this invention
- (b) is a front view of an opening part.
- (A) is an enlarged view of the opening part shown to Fig.5 (a), (b) is an enlarged view of the insertion part shown to FIG.5 (b).
- (A) is a front view of the opening part of the synthetic resin pipe which concerns on 3rd embodiment of this invention, (b) is a front view of an opening part.
- (A) is an enlarged view of the opening part shown to Fig.7 (a), (b) is an enlarged view of the insertion part shown to FIG.7 (b).
- (A) is a front view which shows the modification of the receptacle cover which concerns on this invention,
- (b) is a front view of an opening part.
- (A) is an enlarged view of the opening part shown to Fig.9 (a)
- (b) is an enlarged view of the insertion part shown to FIG.9 (b).
- FIG. 1 is an overall view showing a state in which connection side end portions of the synthetic resin pipes with joints (hereinafter abbreviated as synthetic resin pipes) 1 and 2 according to the present invention are connected to each other.
- 3 is a tube wall having a corrugated structure in which a corrugated cross section is formed in a spiral shape
- 4 is an insertion port
- 5 is a cylindrical port
- X is a tube axis.
- the synthetic resin pipes 1 and 2 are each formed of the same configuration including the insertion port 4 at one end and the receiving port 5 at the other end.
- the resin tube is not necessarily limited to the one having the insertion port 4 and the receiving port 5 at each end of the synthetic resin tube.
- the insertion port 4 (or the receiving port 5) and the receiving port 5 (or the inserting port 4) may be provided at least on the connection side end of the two synthetic resin pipes to be connected. About an edge part, forms other than a receiving part and an insertion port part may be sufficient.
- FIG. 2 is a front view showing a first embodiment of the synthetic resin pipe according to the present invention
- FIG. 2B is an enlarged front view showing the structure of the slot 4.
- the receiving port 5 has a valley filling resin layer 6 filled with resin so as to fill the valley at the connection side end of the synthetic resin tube 2.
- the base end portion of the receiving cover 7 is connected to the outer peripheral surface 6 a formed smoothly by the valley filling resin layer 6.
- the resin for filling the valley is not particularly limited, but foamed polyurethane foam, polystyrene foam, polyethylene foam, rigid vinyl chloride resin foam, urea resin foam, phenol resin foam, acrylic resin foam, cellulose acetate resin foam, etc. are used. As a result, an increase in weight of the receiving portion can be suppressed.
- the receiving cover 7 has a cylindrical shape, and its distal end protrudes a length L from the connection side end face of the synthetic resin tube 2 so that the insertion opening 4 shown in FIG. 2B can be accommodated. It has become.
- the radial height H of the valley filling resin layer 6 is formed slightly higher than the height h of the spiral wave in order to accommodate the opening 4. Therefore, the inner diameter D of the receiving cover 7 is slightly larger than the outer diameter d of the synthetic resin tube 2.
- the receiving cover 7 includes a lightweight mortar cylinder 7a as a core, a reinforcing bar 7b disposed in the lightweight mortar cylinder 7a, and a lightweight mortar cylinder.
- 7a is a composite composed of a reinforcing layer 7c formed on the outer peripheral surface of 7a.
- the reinforcing bars 7b are arranged as necessary, and are not essential components of the receiving cover 7.
- the reinforcing layer 7c is constituted by an FRP layer in which a reinforcing fiber is impregnated in a synthetic resin layer.
- a chopped strand mat as a glass fiber base material for FRP formed in a tape shape or a sheet shape can be used, and a preferable basis weight is 100 to 300 g / m 2 .
- a plain weave glass cloth or glass cloth tape for FRP can also be used, and the preferred range of fiber density in this case is 16 to 25 in the vertical direction and 15 to 23 in the horizontal direction / 25 mm.
- the said tape shape means what was cut into tape shape previously.
- a foamed resin is used as the resin for the reinforcing layer 7c
- a liquid synthetic resin is impregnated so as to wrap the reinforcing fiber in the process of foaming the resin in the mold, and the FRP layer is formed by curing.
- the receiving cover 7 can be protected from being damaged even when an impact due to dropping is applied during transportation of the synthetic resin tube.
- the reinforcing layer 7 c that reinforces the receiving cover 7 of the receiving portion 5 can also be applied to the surface of the insertion opening 4.
- the insertion opening 4 can be protected from damage in the same manner as the receiving opening 5. A description will be given later with reference to FIGS. 2 (b) and 3 (b).
- the lightweight mortar cylindrical body 7a has a porous structure in which a large number of bubbles are dispersed.
- a porous structure for example, a foam-like shape in which cement, water, and a foaming agent are preformed. It can be obtained by filling the kneaded material in a mold and curing it.
- the type of cement is not particularly limited, and various types of cement such as ordinary Portland cement, early-strength Portland cement, and ultra-early-strength Portland cement can be used. It is preferable.
- the mixing ratio of cement and water is preferably in the range of 20 to 100 parts by weight, more preferably 20 to 50 parts by weight of water with respect to 100 parts by weight of cement. If there is too much water, the strength tends to decrease, and if there is too little water, the fluidity of the cement kneaded product at the time of molding tends to deteriorate and the moldability tends to be impaired.
- the specific gravity of the lightweight mortar cylinder 7a is preferably 0.5 to 1.0, more preferably in the range of 0.6 to 0.9, and most preferably about 0.7 to 0.8, the same as that of the wood plywood. is there.
- a water reducing agent may be used as appropriate.
- foaming agent is not particularly limited, and various foaming agents known in the art such as protein-based, surfactant-based, and resin-based foaming agents can be used.
- a cylindrical mold (not shown) whose inner diameter is slightly larger than the outer diameter of the lightweight mortar cylinder 7a is prepared.
- the lightweight mortar cylinder 7a is set in the mold in a state slightly lifted from the bottom of the mold.
- a liquid FRP material is filled in the gap between the lightweight mortar cylinder 7a and the cylindrical mold. Thereby, an FRP layer is formed on the surface of the lightweight mortar cylinder 7a.
- the reinforcing layer 7c is formed on the inner surface of the lightweight mortar cylinder 7a in the same manner as described above, and the reinforcing layer 7c is also formed on both end surfaces in the cylinder axis direction of the lightweight mortar cylinder 7a.
- the reinforcing layer 7c is formed on the entire surface of the lightweight mortar cylinder 7a, the strength of the receiving cover 7 is increased, and as a result, the receiving cover 7 can be protected from the external force applied to the receiving portion 5.
- the resin for the FRP material is not particularly limited.
- polystyrene foam, polyethylene foam, rigid polyurethane foam, rigid vinyl chloride resin foam, urea resin foam, phenol resin foam, acrylic resin foam, cellulose acetate resin foam, and other foamed resins can be illustrated.
- the expansion ratio of the foamed resin is not particularly limited, but it is usually preferably about 3 to 6 times and the density is preferably 170 to 340 kg / m 3 .
- the expansion ratio decreases, the strength of the receiving cover 7 increases.
- the weight of the receiving cover 7 increases.
- the strength of the receiving cover 7 decreases. Therefore, the expansion ratio of the foamed resin used to reinforce the receiving cover 7 is determined in consideration of the lightness, strength, impact resistance, and the like of the receiving cover 7.
- foam resin not only foam resin, but also polystyrene resin, polyethylene resin, hard polyurethane resin, soft polyurethane resin, hard vinyl chloride resin, urea resin, phenol resin, acrylic resin, cellulose acetate resin, and other non-foaming synthetic resins are used. You can also.
- the insert port portion 4 has a flange portion 8 formed at the connection side end portion of the synthetic resin tube 1.
- the flange 8 is provided to fill the crests and troughs of the spiral wave at the end on the connection side with a resin to form a smooth outer peripheral surface.
- Examples of the resin for forming the flange 8 include foamed resins such as foamed polyurethane foam, polystyrene foam, polyethylene foam, rigid vinyl chloride resin foam, urea resin foam, phenol resin foam, acrylic resin foam, and cellulose acetate resin foam. It is.
- the foaming resin preferably has an emission ratio of about 3 to 6 times and a density of 170 to 340 kg / m 3 .
- the connecting side of the outer surface 8a of the flange 8 is formed one step lower, and a step 8b is provided.
- FIG. 4 is a front view showing a connection structure between the synthetic resin pipe 1 and the synthetic resin pipe 2.
- an annular gap is formed between the outer wall of the insertion portion 4 and the inner wall of the receiving portion 5 due to the provision of the step 8 b. It is like that.
- An O-ring P as a sealing material is interposed in the annular gap.
- the synthetic resin tubes 1 and 2 are drawn slightly apart so that the arrangement of the insertion portion 4 and the receiving portion 5 can be easily understood, but in an actual connection structure, the synthetic resin tubes 1 and 2 are drawn. The ends of are in contact.
- the step portion 8b for mounting the sealing material is provided on the connection side of the outer surface 8a.
- the step portion 8b is not limited to this, but the non-connection side of the outer surface 8a or the center of the outer surface 8a. It can also be provided in the part. Furthermore, it can also be provided on the inner surface of the receiving cover 7 of the receiving portion 5.
- the shape and structure of the sealing material are not particularly limited as long as the gap between the insertion port 4 and the receiving port 5 can be reliably sealed, and various shapes and structures of sealing materials can be attached at appropriate positions.
- annular protrusion that functions as a seal portion in advance in the insertion portion 4 or the receiving portion 5.
- the outer surface of the synthetic resin pipes 1 and 2 including the insertion port 4 and the receiving port 5 may be coated with a coating agent that can improve waterproofness, weather resistance, and chemical resistance.
- the configuration in which the length in the tube axis direction of the insertion portion 4 is shorter than the length L of the reception portion 5 has been described as an example.
- the length in the tube axis direction of the insertion portion 4 is received. It can also be made to coincide with the length L of the mouth 5.
- FIG. 5 is a front view showing a second embodiment of the synthetic resin pipe according to the present invention, and FIG. FIG. (B) has shown the structure of the opening part.
- the receiving portion 5 has a valley filling resin layer 6 filled with resin so as to fill the valley at the connection side end of the synthetic resin tube 2,
- the base end portion of the receiving cover 9 is connected to the outer peripheral surface 6 a formed smoothly by the valley filling resin layer 6.
- the base end side of the receiving cover 9 is bonded to the outer peripheral surface 6a, and the front end side of the receiving cover 9 protrudes from the connection side end face of the synthetic resin tube 2 by a length L, so that FIG.
- the insertion port 4 shown can be accommodated.
- the receiving cover 9 is composed of a composite of a foamed resin core material 9a and a reinforcing layer 9b formed on the surface of the foamed resin core material 9a. Yes.
- the foamed resin core material 9a is made of a relatively lightweight core material having a density of 70 to 100 kg / m 3 obtained by foaming a foamed resin such as foamed polyurethane foam to a foaming ratio of about 10 to 15 times. .
- the reinforcing layer 9b is formed by foaming a foamed resin such as foamed polyurethane foam about 3 to 6 times, having a density of 170 to 340 kg / m 3 , and impregnating reinforcing fibers in the foamed synthetic resin layer.
- the FRP layer may be formed.
- the insert port 4 shown in FIG. 6 (b) has the same configuration as the insert port 4 shown in FIG.
- the flange portion 8 has a step portion 8b.
- FIG. 7 is a front view showing a third embodiment of the synthetic resin pipe according to the present invention.
- FIG. FIG. (B) has shown the structure of the opening part.
- the receiving port portion 5 includes a valley-filled mortar layer 10 filled with a lightweight mortar so as to fill a valley portion at a connection side end portion of the synthetic resin tube 2.
- a valley filling resin layer 11 filled with foamed resin is provided, and a base end portion of the receiving cover 12 is connected to an outer peripheral surface 11 a formed smoothly by the valley filling resin layer 11.
- valley filling resin layer 11 also covers the outer circumferential surface of the valley filling mortar layer 10, and therefore the outer circumferential surface 11a is formed only of the resin layer.
- the front end side of the opening cover 12 protrudes a length L from the connection side end portion of the synthetic resin tube 2 so that the insertion portion 4 shown in FIG.
- the receiving cover 12 is composed of a composite of a lightweight mortar cylinder 12a and a reinforcing layer 12b formed on the surface of the lightweight mortar cylinder 12a.
- the lightweight mortar cylinder 12a has the same configuration as the lightweight mortar cylinder 7a shown in FIG. 3 (a), and the reinforcing layer 12b has the same configuration as the reinforcing layer 7c shown in FIG. 3 (a). is there.
- a reinforcing bar can be arrange
- the receiving cover 12 can be made of only resin without providing the lightweight mortar cylinder 12a.
- the base end portion of the receiving cover 12 can be supported by the outer peripheral surface 11a having a larger area than the receiving portion 5 shown in FIG. 5 can be increased. Moreover, the adhesive strength between the tube main body portion and the receiving portion can be increased.
- the end portions other than the valley filling resin layer 11 are valley filled with the valley filling cement layer 10 to reduce the weight, it is possible to achieve both strength improvement and weight reduction for the receiving portion 5. It has become.
- a ring portion 13 a is formed in a trough portion in the vicinity of the connection side end face in the insert port portion 4.
- the ring portion 13a comes into contact with the end surface of the valley filling resin layer 11 on the synthetic resin tube 2 side.
- This ring portion 13a is filled and molded at substantially the same height as the peak portion of the spiral wave, for example, foamed polyurethane foam, polystyrene foam, polyethylene foam, rigid vinyl chloride resin foam, urea resin foam, phenol resin foam, It is comprised from foamed resin, such as an acrylic resin foam and a cellulose acetate resin foam.
- the valley portion other than the portion where the ring portion 13 a is formed is valley-filled by the valley-filling mortar layer 14 in the same manner as the valley-filling mortar layer 10 to reduce the weight. It is illustrated.
- the valley-filled mortar layer 14 is further covered with a coating resin layer 13b made of the same foamed resin as the ring portion 13a.
- the ring portion 13a is formed one step lower than the covering resin layer 13b, thereby forming a step portion 13c for mounting a sealing material.
- FIG. 9 is a front view showing a modified example of the mouth cover.
- FIG. 9 (a) shows the structure of the mouth part
- FIG. 9 (b) shows the structure of the mouth part. Show.
- FIG. 9 the same components as those in FIG. 7 are denoted by the same reference numerals, and the description thereof is omitted.
- the receiving portion 5 includes a valley-filling mortar layer 10 and a valley-filling resin layer 11 so as to fill the valley portion at the connection side end portion of the synthetic resin tube 2.
- the base end portion of the receiving cover 12 is connected to the outer peripheral surface 11 a of the valley filling resin layer 11.
- the receiving cover 12 has a cylindrical shape, and the front end side protrudes a length L from the connection side end face of the synthetic resin tube 2 so that the insertion opening 4 shown in FIG. ing.
- the receiving cover 12 includes a synthetic resin cylinder portion 15 made of a foamed resin such as a rigid polyurethane foam and a corrugated portion partially embedded in the synthetic resin cylinder portion 15. It consists of a tube piece 16.
- the corrugated tube piece 16 has a diameter larger than the outer diameter of the synthetic resin tube 2, and both end portions in the tube axis direction are embedded in the synthetic resin tube portion 15.
- the body outer wall 16 a is exposed in the range S excluding both ends.
- the receiving cover 12 is configured by embedding the corrugated tube piece 16 in the synthetic resin cylinder portion 15 with a part of the corrugated tube piece 16 exposed.
- the corrugated tube piece 16 with the synthetic resin cylinder portion 15 at the end portion of the receiving cover 12 where strength is particularly required.
- the intermediate portion is exposed to reduce the weight and reduce the material of the synthetic resin cylinder portion 15.
- the outer appearance of the synthetic resin tube 2 is the same as that of the synthetic resin tube 2. To do.
- a cylindrical lightweight mortar cylinder 7a serving as a core material is manufactured.
- the inner diameter of the lightweight mortar cylinder 7 a is determined to be slightly larger than the outer diameter of the synthetic resin tube 2.
- a core mortar mold (not shown) is filled with a lightweight mortar material to form a lightweight mortar cylinder 7a.
- the core material working die is composed of an inner cylindrical frame, an outer cylindrical frame, and a bottom plate.
- a reinforcing fiber sheet is attached to the inner wall of the barrel portion, the outer wall of the barrel portion, and the end surfaces in the cylinder axis direction of the lightweight mortar cylinder 7a taken out after demolding.
- the lightweight mortar cylinder 7a with the reinforcing fiber sheet attached to the surface is then accommodated in a reinforcing layer manufacturing die (not shown).
- a predetermined gap is secured between the reinforcing layer manufacturing die and the lightweight mortar cylinder 7a, and the gap is filled with foamed resin.
- the filled foamed resin is impregnated into the reinforcing fiber, whereby an FRP layer is formed on the surface of the lightweight mortar cylinder 7a.
- the receiving cover 7 is formed by the above process.
- connection-side end portion in synthetic resin pipe In addition to the manufacture of the receiving cover, a process for connecting the receiving cover 7 to the connection-side end portion of the synthetic resin pipe 2 is performed.
- an end processing mold (not shown) divided into two cylinders is set to surround the outer peripheral surface of the synthetic resin tube 2.
- the end treatment mold is formed with a spiral crest that can be engaged with a spiral trough of the synthetic resin tube 2.
- the foamed resin is injected into the gap between the end processing mold and the synthetic resin tube 2.
- Adhesives when integrally molded by bonding include epoxy adhesives, acrylic resin adhesives, urethane resin adhesives, silicone resin adhesives, phenol resin adhesives, polyurethane resin adhesives, cyanoacrylate adhesives An adhesive or the like can be used.
- connection mold is a mold obtained by dividing a cylinder into two in the tube axis direction, and has a shape that can be divided into left and right or up and down.
- connection mold After the receiving cover 7 is arranged at a predetermined position in the connection mold, the synthetic resin tube 2 is inserted from the base end side of the receiving cover 7.
- the insertion position of the synthetic resin tube 2 is determined by fitting the pitch of the helical wave of the synthetic resin tube 2 and a groove provided in the inner surface of the mold in accordance with the shape of the helical wave.
- the resin amount, the resin temperature, and the like are adjusted according to the diameter, pitch width, and other design conditions of the synthetic resin layer 2.
- the valley filling resin layer 6 and the receiving cover 7 are integrated, and the receiving portion 5 is manufactured.
- the receptacle part 5 shown in FIG. 6 can be manufactured.
- the insert port portion of the synthetic resin pipe 1 is another type in which the cylinder is divided into two on the connection side end portion of the synthetic resin tube 1 in the same manner as the processing of the connection side end portion of the synthetic resin tube 2.
- An end processing mold (not shown) is set to surround the outer peripheral surface of the synthetic resin tube 1, and the spiral crest formed in the end processing mold is fitted to the spiral valley of the synthetic resin tube 1. .
- the inner wall of the receiving cover 7 in this embodiment was formed in the taper which inclines forwardly toward a connection direction, the inner wall of the receiving cover 7 may be parallel to a cylinder axis direction.
- the present invention has been described by taking a synthetic resin tube with a spiral wave as an example.
- the present invention is not limited to a spiral wave, but a so-called ring-type corrugated synthetic resin tube in which the waveform continues independently in the tube axis direction. It can also be applied to.
- the cross-sectional shape of the wave includes various waveforms such as a square wave, a round wave, or a wave having a groove formed at the top.
- the synthetic resin pipe with a joint of the present invention and its connection structure can be used for a drain pipe buried in the soil, a large drain pipe for sewers, and the like.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Joints That Cut Off Fluids, And Hose Joints (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
上記継手として、上記波付き合成樹脂管の接続側端部から筒状に延設される受口部を有し、
上記受口部は、筒状に成形された発泡成形体とその発泡成形体の少なくとも外周面に積層されたFRP層との複合体からなることを要旨とする。
上記挿し口部を備えた合成樹脂管が波付き合成樹脂管からなり、その接続側端部に、波の谷部を埋めて平滑にする差し口谷埋め層が形成されていることを要旨とする。
図2は本発明に係る合成樹脂管の第一実施形態を示した正面図であり、同図(a)は受口部5の構成を拡大して示した正面図、同図(b)は差し口部4の構成を拡大して示した正面図である。
図2(a)において、受口部5は、合成樹脂管2の接続側端部の谷部を埋めるようにして樹脂を充填した谷埋め樹脂層6を有し、この谷埋め樹脂層6によって平滑に形成された外周面6aに受口カバー7の基端部が接続されている。
図2(b)において、差し口部4は、合成樹脂管1の接続側端部に形成された鍔部8を有している。この鍔部8は、接続側端部における螺旋波の山部と谷部を樹脂で埋めて平滑な外周面を形成するために設けられている。
差し口部4を受口部5に挿入すると、上記段差部8bが設けられていることによって差し口部4の胴部外壁と受口部5の胴部内壁との間に環状の隙間が生じるようになっている。この環状の隙間にシール材としてのOリングPが介装される。
図5は本発明に係る合成樹脂管の第二実施形態を示した正面図であり、同図(a)は受口部の構成を示し、同図(b)は差し口部の構成を示している。
図5(a)において受口部5は、合成樹脂管2の接続側端部の谷部を埋めるようにして樹脂を充填した谷埋め樹脂層6を有し、この谷埋め樹脂層6によって平滑に形成された外周面6aに受口カバー9の基端部が接続されている。
図6(b)に示す差し口部4は、図3(b)に示した差し口部4と同じ構成であり、合成樹脂管1の接続側端部に鍔部8を有し、上記鍔部8は段差部8bを有している。
図7は本発明に係る合成樹脂管の第三実施形態を示した正面図であり、同図(a)は受口部の構成を示し、同図(b)は差し口部の構成を示している。
図7(a)において、受口部5は、合成樹脂管2の接続側端部の谷部を埋めるようにして軽量モルタルが充填された谷埋めモルタル層10および発泡樹脂が充填された谷埋め樹脂層11を有し、この谷埋め樹脂層11によって平滑に形成された外周面11aに受口カバー12の基端部が接続されている。
図8(b)の拡大図において、差し口部4における接続側端面近傍の谷部には、リング部13aが形成されている。このリング部13aは、合成樹脂管2側の谷埋め樹脂層11の端面と当接するようになっている。
図9は、受口カバーの変形例を示した正面図であり、同図(a)は受口部の構成を示し、同図(b)は差し口部の構成を示している。
図9(a)において、受口部5は、合成樹脂管2の接続側端部の谷部を埋めるようにして谷埋めモルタル層10および谷埋め樹脂層11を有し、この谷埋め樹脂層11の外周面11aに受口カバー12の基端部が接続されている。
図10(b)の拡大図において、差し口部4の構成は図8(b)に示す差口部4の構成と同じである。
図2に戻って説明する。
まず、芯材となる筒状の軽量モルタル筒体7aを製作する。
上記受口カバーの製作とは別に、合成樹脂管2の接続側端部に上記受口カバー7を接続するための処理を施す。
上記の方法で製作された合成樹脂管端部2の谷埋め樹脂層6の外周面6aに、上記方法で製作された受口カバー7の基端部を位置決めし、一体成形する。
合成樹脂管1の差し口部は、合成樹脂管2の接続側端部の処理と同様に、合成樹脂管1の接続側端部に、円筒を二つ割りした別の端部処理用金型(図示しない)をセットして合成樹脂管1の外周面を取り囲み、端部処理用金型に形成されている螺旋山部を合成樹脂管1の螺旋谷部に嵌め合わせる。
Claims (11)
- 波付き合成樹脂管の接続側端部に、上記波付き合成樹脂管同士を接続するための継手が備えられている合成樹脂管において、
上記継手として、上記波付き合成樹脂管の接続側端部から筒状に延設される受口部を有し、
上記受口部は、筒状に成形された発泡成形体とその発泡成形体の少なくとも外周面に積層されたFRP層との複合体からなることを特徴とする継手付き合成樹脂管。 - 上記発泡成形体の内周面にFRP層が積層されている請求項1に記載の継手付き合成樹脂管。
- 上記発泡成形体の管軸方向各端面にFRP層が積層されている請求項1または2に記載の継手付き合成樹脂管。
- 上記波付き合成樹脂管の接続側端部に、波の谷部を埋めて平滑にする谷埋め層を有し、この谷埋め層を介して上記波付き合成樹脂管と上記受口部とが接続されている請求項1~3のいずれか1項に記載の継手付き合成樹脂管。
- 上記谷埋め層が、発泡樹脂および気泡モルタルの少なくともいずれか一方から構成されている請求項4記載の継手付き合成樹脂管。
- 上記発泡成形体が、発泡樹脂または気泡モルタルからなる請求項1~5のいずれか1項に記載の継手付き合成樹脂管。
- 上記波付き合成樹脂管が、円筒状の合成樹脂内管と、その合成樹脂内管の外面に一定の間隔を空けて螺旋状に巻回される断面凸形の補強芯材と、この補強芯材の外面を被覆する合成樹脂外管との組み合わせからなる請求項1~6のいずれか1項に記載の継手付き合成樹脂管。
- 請求項1~7のいずれか1項に記載の受口部を備えた継手付き合成樹脂管と、上記受口部に挿入する挿し口部を備えた継手付き合成樹脂管とから構成される継手付き合成樹脂管の接続構造であって、
上記挿し口部を備えた合成樹脂管が波付き合成樹脂管からなり、その接続側端部に、波の谷部を埋めて平滑にする差し口谷埋め層が形成されていることを特徴とする継手付き合成樹脂管の接続構造。 - 上記差し口谷埋め層が、発泡樹脂および気泡モルタルの少なくともいずれか一方から構成されている請求項8記載の継手付き合成樹脂管の接続構造。
- 上記挿し口部の少なくとも外周面に、FRP層が形成されている請求項8または9に記載の継手付き合成樹脂管の接続構造。
- 上記挿し口部と上記受口部の間にシール材が設けられている請求項8~10にいずれか1項に記載の継手付き合成樹脂管の接続構造。
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JP2012536111A JP5202768B2 (ja) | 2010-10-01 | 2010-10-01 | 継手付き合成樹脂管およびその接続構造 |
EP10857879.0A EP2623837B1 (en) | 2010-10-01 | 2010-10-01 | Synthetic resin tube with joint and connection structure thereof |
KR1020137007070A KR101465374B1 (ko) | 2010-10-01 | 2010-10-01 | 조인트가 구비된 합성 수지관 및 그 접속 구조 |
CN201080069405.0A CN103140708B (zh) | 2010-10-01 | 2010-10-01 | 带连接件的合成树脂管及其连接结构 |
US13/822,107 US20130175797A1 (en) | 2010-10-01 | 2010-10-01 | Synthetic resin pipe with joint and connection structure thereof |
PCT/JP2010/067256 WO2012042666A1 (ja) | 2010-10-01 | 2010-10-01 | 継手付き合成樹脂管およびその接続構造 |
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EP2708789A1 (en) * | 2011-05-10 | 2014-03-19 | Kanaflex Corporation | Helically corrugated synthetic resin pipe with joint, and structure for connecting helically corrugated synthetic resin pipes |
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US11794418B2 (en) | 2020-07-20 | 2023-10-24 | Saudi Arabian Oil Company | Apparatus and method for threaded-welded reinforced thermosetting resin pipe joints |
EP4182593A1 (en) | 2020-07-20 | 2023-05-24 | Saudi Arabian Oil Company | Apparatus and method for friction welding of reinforced thermosetting resin pipe joints |
WO2022020301A1 (en) | 2020-07-20 | 2022-01-27 | Saudi Arabian Oil Company | Apparatus and method for electrofusion welding of reinforced thermosetting resin pipe joints |
US12055253B2 (en) | 2020-12-17 | 2024-08-06 | Saudi Arabian Oil Company | Apparatus and method for bonding tie layers on reinforced thermosetting resin laminates for use in welding thermoset composite pipe joints |
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EP2623837A4 (en) | 2015-12-16 |
US20130175797A1 (en) | 2013-07-11 |
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CN103140708A (zh) | 2013-06-05 |
CN103140708B (zh) | 2015-02-18 |
JP5202768B2 (ja) | 2013-06-05 |
KR20130066671A (ko) | 2013-06-20 |
EP2623837B1 (en) | 2017-08-09 |
JPWO2012042666A1 (ja) | 2014-02-03 |
KR101465374B1 (ko) | 2014-11-26 |
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