JP4557388B2 - Method for manufacturing fluid transport pipe with protective pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fluid transport pipe with a protective pipe, in which a protective pipe is integrally formed with an intermediate layer on the outer periphery of the fluid transport pipe.
[0002]
[Prior art]
In recent years, hot water supplied from hot water supply facilities is often used to heat buildings. An example of heating using such a hot water supply facility is floor heating.
[0003]
The underfloor piping used for floor heating is wrapped with an aluminum vapor deposition sheet that forms heat radiation on the bare piping so that the hot water from the hot water supply system can be effectively exchanged with the floor. However, in the piping part of the non-floor heating part up to the room that requires floor heating, piping that fits a protective pipe called a sheath pipe on the fluid transport pipe is made. ing.
[0004]
In addition, when the piping route of the hot water supply equipment is long, there is a concern that water hammer phenomenon may occur in the piping due to the opening and closing of the currant because the inertial force remains in the fluid in the piping. Attach one end of a long silencing tape made of polyester tape or the like to the insertion tip side of the fluid transport pipe via adhesive tape, and insert this fluid transport pipe from the tip to the end of the protection tube to protect it. By making the sound-absorbing tape continuously exist over the entire length between the pipe and the fluid transport pipe, a contrivance has been made to reduce the splash phenomenon and the impact sound of the fluid transport pipe due to the water hammer phenomenon as much as possible.
[0005]
[Problems to be solved by the invention]
However, in the former case, there is a problem that there is a heat escape due to a gap between the protective tube and the fluid transport tube. Since the thickness of the tape is thin, the sound insulation effect is low, and in order to eliminate this, we think that it is necessary to increase the sound insulation effect by increasing the thickness of the sound deadening tape, but if the thickness is increased, the sound deadening tape will be There is a problem that the fluid transport pipe cannot be inserted into the protective pipe due to obstruction, and there is a problem that only the sound-absorbing tape having a thickness that can be inserted can be used.
[0006]
The present invention has been made in view of the above-described circumstances, and the main problems thereof are a method for manufacturing a fluid transport pipe with a protective pipe, which is excellent in heat insulation and sound insulation, and excellent in handleability. The point is to provide.
[0007]
[Means for Solving the Problems]
In the protection tube with fluid transport tube, a fluid transport tube having flexibility, and a protective tube having flexibility to fitted on the fluid transport pipe, the inner periphery of the outer peripheral surface and the protective tube of the fluid transport pipe The fluid transport tube and the protective tube may be integrated with an intermediate layer that is elastically deformable in the form of a bubble assembly between the surface .
[0008]
According to the above Ki構 formation, high thermal insulation since the intermediate layer is formed between the fluid transport pipe and the protective pipe, also the fluid transport pipe is surrounded doubly by the intermediate layer and the protective tube Therefore, even if a water hammer phenomenon occurs in the fluid transport pipe, for example, the impact force is buffered by the intermediate layer, so that the sound insulation effect of silencing the impact sound is high.
Moreover, since the fluid transport pipe, the intermediate layer, and the protective pipe are integrally formed, the structure can be used for the pipe as it is, so that the handleability is excellent.
Therefore, the reliability of the hot water supply equipment can be remarkably improved by using the fluid transport pipe with a protective pipe having such a configuration for the piping portion of the hot water supply equipment.
[0009]
According to a first aspect of the present invention, there is provided a fluid transport pipe with a protective tube, wherein a flexible fluid transport pipe is attached with an expansion body that gradually expands over time along the longitudinal direction of the pipe. Before the expansion body finishes expanding, the fluid transport pipe is inserted from the mounting tip side to the mounting end into a protective tube having a diameter larger than that of the fluid transport pipe and having flexibility, from the tube axis direction. The intermediate layer is formed by expanding over time from an initial thickness smaller than the gap width between the fluid transport pipe and the protective pipe to a thickness corresponding to the gap width, and the fluid transport pipe and the protective pipe The inflatable body is formed of a long sheet, and at least one end portion in the longitudinal direction of at least the insertion tip of the fluid transport tube with respect to the protective tube. Is in the point of inserting in a fixed wearing state
[0010]
According to the above characteristic configuration, a new fluid transport pipe with a protective tube is manufactured, in which an intermediate layer is integrally formed between the fluid transport pipe and the protective pipe, by a simple manufacturing method in which the fluid transport pipe is inserted into the protective pipe. can do. Moreover, since the expansion body which comprises an intermediate | middle layer is the structure which expand | swells over time, it becomes possible to manufacture easily the fluid transport pipe with a protective pipe | tube long about 50m, for example.
[0011]
Moreover, since the fluid transport pipe, intermediate layer and protective pipe are integrally formed in advance, it is possible to cut out the required length at the construction site and use it immediately. Attach one end to the insertion tip side of the fluid transport pipe with adhesive tape, insert this fluid transport pipe from the front end to the end of the protective pipe, and silence the tape between the protective pipe and the fluid transport pipe Compared to the conventional method that required assembly to be continuously present over the required length, the construction labor and construction time can be greatly reduced.
In addition, according to the above characteristic configuration, as the fluid transport pipe is inserted into the protective pipe, the portion of the expansion body that is not fixed to the fluid transport pipe is inserted into the protective pipe following the protective pipe. Therefore, the structure is simple, such as not providing an adhesive surface on the expandable body itself, and since there is no need for processing due to the absence of an extra structure, it has a low cost and economical effect in terms of cost. Here, at the construction site, with respect to the protective tube, the fluid transport tube with the protective tube is inserted in a mounting state in which the longitudinal end of the long sheet-like expansion body is fixed only to at least the insertion tip of the fluid transport tube. If the construction is to obtain the above, it falls within the technical category of the manufacturing method of the fluid transport pipe with a protective pipe.
[0012]
According to a second aspect of the present invention, there is provided a characteristic configuration of the method for manufacturing a fluid transport pipe with a protective pipe, wherein the expansion body has a compressive force applied form and is thin in thickness. It is in the point comprised from the closed-cell cross-linked resin foam which expand | swells gradually, when the thickness is elastically restored and air permeates into the bubbles.
Moreover, while the said expansion body is comprised from the closed cell crosslinked resin foam, you may be comprised from the expansion sheet by which the mounting | wearing side is an adhesive surface .
[0013]
According to the above Ki構 formed, excellent thermal insulation and sound insulation, moreover, it is possible to easily mounted state expansion sheet by sticking the fluid transport pipe, are the expanded sheet was attached fluid Since the transport pipe can be efficiently inserted into the protective pipe and the fluid transport pipe with the protective pipe can be manufactured, productivity can be improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment
Hereinafter, a fluid transport pipe A with a protective pipe according to an embodiment of the present invention will be described with reference to the drawings.
The fluid transport pipe A with a protection pipe of this embodiment is a long multilayer pipe having a length of about 50 m, for example, as shown in FIGS. It is configured to cut and use the necessary length. Specifically, for example, it is used for an indoor piping portion of a hot water supply facility.
[0017]
As shown in FIG. 1, the fluid transport pipe A with a protective tube includes a fluid transport pipe 1, a protective pipe 2 fitted around the fluid transport pipe 1, an outer peripheral surface 1 A of the fluid transport pipe 1, and a protective pipe 2. Between the inner peripheral surface 2A, an intermediate layer 3 that is elastically deformable in the form of bubbles is interposed, and the fluid transport pipe 1 and the protective pipe 2 are integrated.
[0018]
The fluid transport pipe 1 is, for example, a flexible synthetic resin pipe made of polyethylene or polybutadiene having a thickness of about 1.4 mm to 2.3 mm and an outer diameter of about 13 mm to 27 mm.
[0019]
The protective tube 2 has, for example, a thickness of approximately 1 mm to 2 mm, an outer diameter of approximately 21 mm to 42 mm, and an inner diameter of approximately 16 mm to 35 mm. A bellows tube made of a synthetic resin tube such as a CD tube or a PF tube having flexibility, in which concave lines appear alternately.
[0020]
The intermediate layer 3 is formed of a synthetic resin material having a flexible bubble aggregate shape in which a large number of bubbles are mixed by foaming in the layer, and is interposed between the fluid transport pipe 1 and the protective pipe 2 in a compressed state. Has been.
[0021]
As a specific example of the intermediate layer 3, a thermoplastic resin such as a polyolefin-based resin, preferably polyethylene, is preferably subjected to a crosslinking means, a foaming means, an independent foaming means, and a shrinking means in the order of description, and initially in a contracted state. Some expand as time elapses to restore the bubble shape, and the bubble aggregate form becomes a closed cell crosslinked resin foam. As a suitable example of the closed cell cross-linked resin foam, there is a polyethylene foam sheet “Soflon (trade name)” (manufactured by Sekisui Chemical Co., Ltd.) which is an expanded body that gradually expands at room temperature over time. This is configured such that a long sheet is wound in a spiral shape and the expansion due to the elastic restoring force is suppressed, and by releasing the wound state, the sheet is released from the restrained state and expanded. Here, as the crosslinking means, there are electrons, ultraviolet rays, silanes, peroxide crosslinking methods, etc., and as the foaming means, there are extrusion using a pressure difference, in-mold, normal pressure firing, chemical reaction foaming, etc. As the closed cell means, there are electrons, ultraviolet rays, silanes, peroxide crosslinking methods, etc., and as the shrinking means, foaming is carried out at a high temperature and cooled and physically compressed. If you use a gas that has a higher permeability coefficient than atmospheric pressure air as a permeation material and a permeation material, and leave it in atmospheric air after completion, the gas will dissipate rather than penetrate the air, and the whole contracts. When is completed, there is a contraction means or the like in which air begins to permeate with elastic recovery and then starts to expand.
[0022]
In this embodiment, as shown in FIGS. 3 to 5, a long expansion sheet 3 </ b> A that is an expansion body constituting the intermediate layer 3 is spirally wound around the outer peripheral surface of the fluid transport pipe 1 without a gap. Thus, the intermediate layer 3 is formed uniformly between the fluid transport pipe 1 and the protective pipe 2 over the entire length of the fluid transport pipe A with the protective pipe. Here, when attaching the expansion sheet 3A to the fluid transport pipe 1, the adhesive sheet 3B provided with an adhesive material is provided on the mounting surface side of the expansion sheet 3A and attached to the fluid transport pipe 1 Even if it is the structure which will be in a state, the structure which will be in an attachment state may be sufficient by apply | coating an adhesive agent to the outer peripheral surface of the fluid transport pipe 1, and sticking expansion sheet 3A.
[0023]
In addition to this embodiment, in the present invention, as shown in FIG. 6, the expansion sheet 3 </ b> A is wound around the fluid transport pipe 1 with a spiral winding interval, or as shown in FIG. The intermediate layer 3 may be formed at intervals along the longitudinal direction of the tube by winding with an interval in the direction.
In this case, since the intermediate layer 3 and the air layer 4 are alternately formed along the longitudinal direction of the pipe between the fluid transport pipe 1 and the protective pipe 2, the heat insulation effect and the sound insulation effect by the intermediate layer 3 are provided. And the heat retention effect and the sound insulation effect by the air layer 4 can be made to act.
[0024]
Further, the intermediate layer 3 may be formed by placing the inflatable sheet 3A along the longitudinal direction of the fluid transport pipe 1 and winding and mounting both width portions of the inflatable sheet 3 in the pipe circumferential direction. FIG. 8 shows an example in which the intermediate layer 3 is formed over the entire length of the fluid transport pipe 1, and FIG. 9 shows an example in which the intermediate layer 3 is formed at intervals in the longitudinal direction of the fluid transport pipe 1. Show.
[0025]
Furthermore, the fluid transport pipe A with a protective pipe is attached to the fluid transport pipe 1 instead of being wound by continuously attaching the expansion sheet 3A having a pipe circumference divided into two (FIG. 10) or four (FIG. 11) in the longitudinal direction of the pipe. The intermediate layer 3 may be formed between the fluid transport pipe 1 and the protective pipe 2 over the entire length.
[0026]
Further, an expansion sheet 3A that divides the pipe circumference into two parts (FIG. 12) or four parts (FIG. 13) is attached to the fluid transport pipe 1 with a space in the longitudinal direction of the pipe, so that the fluid transport pipe A with a protective pipe is spaced. A typical intermediate layer 3 may be formed.
[0027]
Next, the manufacturing method of such a fluid transport pipe A with a protective pipe will be described.
In principle, the expansion sheet 3 </ b> A is attached to the outer peripheral surface of the fluid transport pipe 1, and the fluid transport pipe 1 is mounted from the mounting tip side to the mounting end before the expansion body finishes expanding, rather than the fluid transport pipe 1. The expansion sheet 3A is inserted into the large-diameter protective tube 2 from the tube axis direction, and the expansion sheet 3A is located between the outer peripheral surface of the fluid transport tube 1 and the inner peripheral surface of the protective tube 2 as shown in FIG. As shown in FIG. 1 (b), the initial thickness t1 smaller than the gap width expands from the initial thickness t1 to the thickness t2 corresponding to the gap width with the passage of time (for example, the passage of time in days such as 7 days). The intermediate layer 3 is formed by the above, and the fluid transport pipe A with a protective pipe for integrating the fluid transport pipe 1 and the protective pipe 2 is manufactured.
[0028]
As a specific example, as shown in FIG. 14, first, as shown in FIG. 14 (b), the manufacturing apparatus C of the fluid transport pipe 1 is placed in the protective pipe 2 having a preset length. The expansion sheet 3A is inserted from the output end of the formed fluid transport pipe 1 while being manually or automatically mounted.
[0029]
Next, when insertion into the length of the protective tube 2 is completed, the fluid transport tube 1 is cut through a cutting tool or cutting device, and as shown in FIG. The attached fluid transport pipe A1 is formed.
[0030]
Next, as shown in FIG. 14 (c), the in-process fluid transport pipe A1 with a protective pipe is wound around the winding reel B.
In mass production, the above steps are repeated.
[0031]
In this manufacturing method, the fluid transport pipe A with a protective tube, which is a product, is formed through storage until the expansion sheet 3A finishes expansion. Here, the winding around the tube winding tool 10 may be performed after the expansion sheet 3A has finished expanding. Needless to say, the attachment of the expansion sheet 3A to the fluid transport pipe 1 includes the attachment shown in FIGS.
[0032]
Other than this manufacturing method, as shown in FIG. 15, as shown in FIG. 15 (a), a pre-manufactured set-length fluid transport pipe in a pre-manufactured set-length protective tube 2 is used. The inflatable sheet 3A is inserted from the tip of 1 while being mounted manually or automatically.
[0033]
Next, when insertion into the length of the protective tube 2 is completed, the fluid transport tube 1 is cut through a cutting tool or a cutting device, and as shown in FIG. The attached fluid transport pipe A1 is formed.
[0034]
Next, as shown in FIG. 15 (c), the in-process fluid transport pipe A1 with a protective pipe is wound around the winding reel B.
[0035]
Although the manufacturing method of the fluid transport pipe A with a protective pipe in the above two examples has been described in which the mounting side of the expansion sheet 3A is formed on the adhesive surface 3B, the present invention is not limited thereto, and the adhesive surface 3B is formed. As shown in FIG. 16 (a), the distal end portion 3a of the expansion sheet 3A is inserted into the insertion distal end portion of the fluid transport pipe 1 inserted into the protective tube 2, using the expansion sheet 3A that is a simple and long expansion body. Is fixed with an adhesive tape 5 or the like, and the expansion sheet 3A portion on the rear side from the fixing portion is spirally wound along the fluid transport pipe 1 without a gap or spirally wound with a gap therebetween. , By inserting the fluid transport pipe 1 into the protective tube 2, as shown in FIG. 16 (b), the intermediate sheet 3A is in an expanded state between the protective pipe 2 and the fluid transport pipe 1 Layer 2 may be formed. In this case, although not shown, the end portion of the expansion sheet 3A may be fixed at the insertion end portion of the fluid transport pipe 1 via the adhesive tape 5 or the like, or at equal intervals along the longitudinal direction of the fluid transport pipe 1 The fluid transport pipe 1 may be fixed to the inflatable sheet 3A portion via an adhesive tape 5 or the like.
[0036]
Further, as shown in FIG. 17 (a), a fluid transport pipe inserted into the protective tube 2 using an inflatable sheet 3A, which is a simple and long inflatable body that does not form the adhesive surface 3B. The distal end portion 3a of the inflatable sheet 3A is fixed to the insertion tip portion 1 with an adhesive tape 5 or the like, and the inflatable sheet 3A portion on the rear side from the fixed portion is along the longitudinal direction of the fluid transport pipe 1 and in the circumferential direction. By inserting the fluid transport tube 1 into the protective tube 2 while being wound, the expansion sheet 3A is in an expanded state between the protective tube 2 and the fluid transport tube 1 as shown in FIG. The intermediate layer 2 may be formed. Also in this case, although not shown, the end portion of the expansion sheet 3A may be fixed at the insertion end portion of the fluid transport pipe 1 via the adhesive tape 5 or the like, or at equal intervals along the longitudinal direction of the fluid transport pipe 1 The inflatable sheet 3A portion may be fixed to the tape via an adhesive tape 5 or the like.
[0037]
[Other Embodiments]
1) In the above embodiment, the expansion sheet 3A, which is an expansion body constituting the intermediate layer 3, is directly attached to the fluid transport pipe 1. However, the present invention is not limited to this, and an aluminum sheet is coated. The configuration may be such that the expansion sheet 3 </ b> A is attached to the fluid transport pipe 1.
In this case, the heat retaining property of the fluid transport pipe 1 can be further improved.
2) In the above embodiment, the expansion sheet 3A using the closed cell cross-linked resin foam has been described. However, the present invention is not limited to this, and a synthetic resin in the form of a cell assembly such as foamed urethane may be used. .
In this case, after inserting the fluid transport pipe 1 into the protective tube 2, the gap between the two is forcibly filled with a mixture of foams to cause firing in the gap between the fluid transport pipe 1 and the protective pipe 2. An intermediate layer 3 made of foamed urethane is formed in the gap between the two.
[0038]
3) In the above-described embodiment, the fluid transport pipe 1 is disclosed as a straight pipe shape, but may be a bellows tube. Further, although the protective tube 2 is disclosed as a bellows tube, it may be a straight tube.
4) In order to promote expansion of the inflatable sheet 3A attached to the fluid transport pipe 1, the inflated sheet 3A in the attached state is formed with cuts, perforations, etc., to widen the air suction area and accelerate the expansion. Good.
5) Although the intermediate layer 3 of the fluid transport pipe A with the protective tube has been described in the above embodiment as being interposed between the fluid transport pipe 1 and the protective pipe 2, the present invention is not limited thereto, Although the intermediate layer 3 expands, it is configured to be an expanded body that does not reach the inner peripheral surface 2A of the protective tube 2 so that the fluid transport tube 1, the protective tube 2, and the intermediate layer 3 are integrated by the frictional force of the intermediate layer 3. It may be done.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view (a) of a fluid transport pipe with a protective tube of an embodiment to which the present invention is applied; FIG. 1 (b) is a cross-sectional view showing a state before the expansion body expands; Fig. 2 is a perspective view showing a state in which a fluid transport pipe with a protective tube is wound around a tube reel. Fig. 3 is a side sectional view of a fluid transport tube with a protective tube. FIG. 5 is a perspective view of a principal part showing a state where the fluid transport pipe is inserted while being attached. FIG. 5 is a perspective view of a principal part showing a state where the expansion sheet is attached. FIG. FIG. 7 is a perspective view of a main part showing an example of another mounting state of the expansion sheet. FIG. 8 is a perspective view of a main part showing an example of another mounting state of the expansion sheet. Fig. 10 is a perspective view of the main part showing an example of the state. Fig. 10 is a perspective view of the main part showing an example of another mounting state of the expansion sheet. The principal part perspective view which shows the example of the other mounting state. [FIG. 12] The principal part perspective view which shows the example of the other mounting state of an expansion sheet. [FIG. 13] The principal part perspective view which shows the example of the other mounting state of an expansion sheet. FIG. 14 is an explanatory view (a) showing a manufacturing method of a fluid transport pipe with a protective tube to which the present invention is applied. FIG. 14 is an explanatory view showing a state in which the fluid transport pipe is inserted while an expansion sheet is attached to the protective pipe. ) Explanation of fluid transport pipe with protective tube (c) Explanation of the state where the fluid transport pipe with protective pipe is wound on a tube reel [FIG. 15] Manufacture of other fluid transport pipe with protective pipe to which the present invention is applied Explanatory drawing (a) which shows a method is explanatory drawing which shows the state which has inserted the fluid transport pipe, attaching an expansion sheet to a protective pipe (b) Explanatory drawing of the fluid transport pipe with a protective pipe (c) Fluid with protective pipe FIG. 16 is an explanatory diagram of a state where the transport pipe is wound on the winding reel. Explanatory drawing showing the manufacturing method of fluid transport pipe with pipe (A) is an explanatory diagram showing the state of inserting the fluid transport pipe while attaching the expansion sheet to the protective pipe (B) Explanatory drawing of the fluid transport pipe with protective pipe 17 is an explanatory view (a) showing another method for manufacturing a fluid transport pipe with a protective pipe to which the present invention is applied. FIG. 17 is an explanatory view (b) showing a state in which the fluid transport pipe is inserted while an expansion sheet is attached to the protective pipe. Illustration of fluid transport pipe with pipe 【Explanation of symbols】
A Fluid transport pipe with protective pipe 1 Fluid transport pipe 2 Protective pipe 3 Intermediate layer 3A Expansion sheet 3B Adhesive surface

Claims (2)

A flexible fluid transport pipe is attached with an expansion body that gradually expands at room temperature as time passes along the longitudinal direction of the pipe, and the fluid from the mounting tip side to the mounting end until the expansion body finishes expanding. The transport pipe is inserted into a protective tube having a diameter larger than that of the fluid transport pipe and having flexibility, and the expansion body is smaller than the gap width between the fluid transport pipe and the protective tube. From a thickness to a thickness corresponding to the gap width, forming a middle layer by expanding over time, and a method for producing a fluid transport pipe with a protective pipe that integrates the fluid transport pipe and the protective pipe,
A method for manufacturing a fluid transport pipe with a protective tube, wherein the inflatable body is formed of a long sheet, and is inserted in a mounting state in which one end in the longitudinal direction is fixed to at least the insertion tip of the fluid transport pipe. When the compressive force is applied and the expansion body is thin and the compression force is released, the bubble aggregate form is elastically restored to the wall thickness over time, and the air expands gradually as the air penetrates into the bubbles. The manufacturing method of the fluid transport pipe | tube with a protective tube of Claim 1 comprised from the cell crosslinked resin foam .

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