JP2013119227A - Pipe manufacturing member and heat collecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel pipe manufacturing member capable of suppressing the radiation of heat held by flowing water flowing down in an embedded pipe such as a sewage pipe, and a heat collecting structure formed using the pipe manufacturing member.SOLUTION: The pipe manufacturing member 1 manufactured into a tubular body 200 by sequentially joining side edges in order which adjoin to each other to each other by being wound spirally in the embedded pipe 300 includes a long base plate 100 and a plurality of ribs 103, 107 arranged along the longitudinal direction of the surface of the base plate 100, and a heat insulation material 5 is arranged between adjoining ribs in the plurality of ribs 103, 107 arranged at the front surface side of the base plate 100.

Description

  The present invention relates to a pipe-making member that is formed into a tubular body by being spirally wound, and a heat collection structure that is constructed using the pipe-making member.

  The sewage and sewage treated water (hereinafter collectively referred to as sewage) flowing through the sewer pipes are being used as a heat source because they maintain a constant water temperature throughout the year day and night. In addition, since the temperature of sewage is colder in summer compared to the high temperature, it is warmer in winter, so it is possible not only to recover heat but also to recover cold. The use of heat (sewage heat) is expected.

  As means for utilizing this sewage heat, the upper part of the outer peripheral surface of the sewer pipe (the top of the pipe) is covered with a jacket-like heat collecting facility (heat exchanger), and the sewage heat is collected through the wall surface of the sewer pipe. Means have been developed (for example, see Patent Document 1 below).

JP 11-235757 A

  However, the sewage flowing down the sewer pipe is maintained at a constant temperature throughout the year, day and night, but as sewage heat is dissipated through the sewer pipe wall as it flows down the sewer pipe, The water temperature is not always constant throughout the sewer line.

  Therefore, even if a heat exchanger is arranged at a location where the temperature of the sewage is low, the sewage heat cannot be used effectively.

  That is, in order to effectively use sewage heat, it is necessary to place a heat exchanger at a position where the sewage water temperature is high in the sewer pipe, and as a result, the location of the heat exchanger is limited. .

  The present invention has been developed to solve the above technical problem, and is a novel pipe-making member capable of suppressing the dissipation of heat possessed by running water flowing down in a buried pipe such as a sewer pipe, and the production thereof. It aims at providing the heat collection structure constructed | assembled using the member for pipes.

  The first pipe-making member of the present invention is a pipe-making member that is spirally wound in an embedded pipe and piped into a tubular body by sequentially joining adjacent side edges. A plurality of ribs provided along the surface length direction of the substrate, and between adjacent ribs in the plurality of ribs provided on the surface side of the substrate. The heat insulating material is provided.

  In the first pipe-making member of the present invention, it is preferable that at least the substrate is formed of a polymer foam.

  In the first pipe-forming member of the present invention, a preferred embodiment is one in which the polymer foam has an expansion ratio of 10 to 40 times.

  The second pipe-making member of the present invention is a pipe-making member that is spirally wound in an embedded pipe and piped into a tubular body by sequentially joining adjacent side edges. And a plurality of ribs provided along the surface length direction of the substrate, wherein at least the substrate is formed of a polymer foam. .

  The heat collecting structure of the present invention is a tubular tube that is piped using the buried pipe and the first pipe-making member of the invention or the second pipe-making member of the invention and is laid in the buried pipe. And a heat exchanger provided downstream of the position where the tubular body is laid in the buried pipe, and the tubular body flows down the tubular body. The heat exchanger is configured to collect heat held by the flowing water flowing down in the tubular body or the buried pipe.

  ADVANTAGE OF THE INVENTION According to this invention, the dissipation of the heat which the flowing water which flows down in the buried pipe can be suppressed.

Fig.1 (a) is sectional drawing which shows the member for pipe manufacture of this invention which concerns on Embodiment 1, FIG.1 (b) is a mode that the said member for pipe manufacture is wound helically, and is pipe-formed into a tubular body. FIG. 1C is a cross-sectional view showing a state in which the pipe-making members are joined. FIG. 2 is a schematic view schematically showing a heat collection structure of the present invention constructed using the pipe-making member. FIGS. 3A to 3C are cross-sectional views illustrating the secondary side pipe-making member. FIG. 4 is a schematic view schematically showing a heat collection structure of the present invention constructed using the pipe-making member and the secondary-side pipe making member. FIG. 5 is a schematic view schematically showing another example of the heat collection structure of the present invention constructed using the pipe-making member. FIG. 6 is a cross-sectional view showing a pipe-making member according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view showing a pipe-making member according to the third embodiment of the present invention.

  Hereinafter, although an embodiment of the present invention is described based on a drawing, the present invention is not limited to this embodiment.

<Embodiment 1>
[Pipe making member 1]
FIG. 1 shows a member 1 for pipe making according to the first embodiment of the present invention. This pipe making member 1 corresponds to the first pipe making member of the present invention.

  The pipe-making member 1 includes a long substrate 100 and a plurality of ribs (short ribs 107 and long ribs 103) provided along the surface length direction of the substrate 100. It is manufactured by continuously extruding a vinyl chloride resin. A heat insulating material 5 made of foamed urethane is further provided between adjacent ribs of the plurality of ribs 103 and 107 provided on the surface side of the substrate 100. In the present embodiment, the heat insulating material 5 is also provided between the short rib 107 and the inclined side 108.

  That is, the pipe-forming member 1 is provided with the heat insulating effect by providing the heat insulating material 5 between the adjacent ribs of the plurality of ribs 103 and 107 provided on the surface side of the substrate 100.

  As shown in FIG. 1A, a bonding recess 102 is provided along one longitudinal edge of the substrate 100 along the longitudinal direction, and bonding is performed along the longitudinal direction at the other edge of the substrate 100. A convex portion 101 is provided.

  The joint recess 102 extends toward the outer side in the width direction of the substrate 100, and the insertion portion 106 that opens on the inner surface side of the substrate 100 (the surface that becomes the inner wall surface side when the tube is manufactured). And an inclined piece 108 refracted toward the back side of the substrate 100 in the middle. The short rib 107 is provided in a state where the base end is fixed to the back surface of the substrate 100 in the outer layer (the back surface side of the substrate 100) of the fitting portion 106.

  The joint convex portion 101 includes a column portion 104 that stands upright with a base end fixed to the back surface of the substrate 100 (the surface that becomes the outer wall surface of the tube when piped), and the distal end of the column portion 104. And a fitting portion 105 having a substantially circular cross section.

  Between the joint convex part 101 and the joint concave part 102, a plurality of strip-shaped T-shaped long ribs 103 are provided along the longitudinal direction so as to stand upright with the base end fixed to the back surface of the substrate 100. It has been.

  As shown in FIG. 1 (b), the pipe-forming member 1 is spirally wound so that one side edge of the preceding pipe-making member 1 and the other side of the pipe-forming member 1 that follows with a delay in the circulation are obtained. The edges are joined to form a tubular body 200. The pipe-forming member 1 is joined to the joint-forming concave portion 102 of the preceding pipe-making member 1 among the pipe-making members 1 that are adjacent to each other by being spirally wound. This is done by fitting 101 (see FIG. 1C). At this time, the inclined piece 108 of the preceding tube-making member 1 is pressed and fitted into the lower surface of the distal end portion of the long rib 103 of the succeeding tube-making member 1.

  In addition, as a raw material of the said member 1 for pipe making, it is not restricted to a vinyl chloride resin. The pipe-making member 1 may be manufactured using various synthetic resin materials such as polyethylene, polypropylene, and chlorinated vinyl chloride.

  The heat insulating material 5 is not limited to urethane foam. As the heat insulating material 5, for example, a fiber heat insulating material such as glass wool or rock wool, or a foam heat insulating material such as foamed polystyrene or foamed rubber can be used. In the case where a foamed heat insulating material is used as the heat insulating material 5, the expansion ratio is preferably 10 to 100 times.

  The thickness of the heat insulating material 5 is not particularly limited, but the thickness of the heat insulating material 5 is set to the height of the ribs 103 and 107 (from the surface of the substrate 100 to the tips of the ribs 103 and 107). The height to the lower surface of the part) is preferably 30 to 60%.

  If the thickness of the heat insulating material 5 is set in this way, sufficient heat insulating properties can be imparted to the tubular body 200 after pipe making, and when the backfilling material is filled after pipe making, Since the filling material is cured in a state of surrounding the ribs 103 and 107, sufficient strength can be imparted to the tubular body 200.

  By the way, in the present embodiment, the pipe-forming member 1 is manufactured by fitting the joint convex portion 101 provided on the other side edge into the joint concave portion 102 provided along the one side edge. Although the thing used was used, as the said member 1 for pipe making, it is not restricted to what is joined by such a joining mechanism. As the pipe-forming member 1, for example, one side edge and the other side edge of a long belt-shaped member which are adjacent to each other by being spirally wound are separated from the belt-shaped member. What is joined by (Joiner) may be used.

[Heat collection structure 2]
FIG. 2 shows a heat collection structure 2 of the present invention constructed using the pipe-making member 1. The heat collection structure 2 includes an embedded pipe 300, a tubular body 200, and a heat exchanger 4.

  The buried pipe 300 is a sewer pipe buried in the ground.

  The tubular body 200 is manufactured by spirally winding the tube-forming member 1 in the embedded tube 300. Therefore, the pipe outer wall of the tubular body 200 is covered with the heat insulating material 5 and has a heat insulating property.

  A gap existing between the inner wall surface of the buried pipe 300 and the outer wall surface of the tubular body 200 is filled with a backfilling material (not shown) such as mortar.

  The heat exchanger 4 is arranged at the bottom of the inner wall surface of the tubular body 200 in order to collect sewage heat of sewage flowing down in the direction indicated by the arrow in the figure.

  The heat collected by the heat exchanger 4 is converted into a heat transfer medium (water, glycol, or water-glycol mixed liquid) circulating in the secondary circuit (heat transfer medium circuit) TC connected to the heat exchanger 4. Etc.) and is transported to the heat pump 3 arranged on the ground. The heat transfer medium circulates through the secondary circuit TC by a pump (not shown). Hereinafter, in the secondary circuit TC, the flow of the heat transfer medium from the heat exchanger 4 toward the heat pump 3 is referred to as a secondary circuit side forward flow TC1, and the heat transfer medium from the heat pump 3 toward the heat exchanger 4 The flow is referred to as a secondary circuit side double flow TC2.

  In the heat pump 3, a refrigerant circuit RC including an evaporator 31, a compressor (compressor) 32, a condenser 33, and an expansion valve 34 is constructed. The secondary circuit TC is connected to the evaporator 31. That is, the secondary circuit side forward flow TC1 in the secondary circuit TC becomes the secondary circuit side double flow TC2 via the evaporator 31, and is returned to the heat exchanger 4.

  A primary circuit (heat medium circuit) HC is connected to the condenser 33 in the heat pump 3. A heat medium such as water is passed through the primary circuit HC, and the heat medium circulates through the primary circuit HC by a pump (not shown) and passes from the condenser 33 via the heat utilization system HS. , And returned to the condenser 33. Hereinafter, the flow of the heat medium from the condenser 33 toward the heat utilization system HS in the primary circuit HC is referred to as a primary circuit side forward flow HC1, and the flow of the heat medium from the heat utilization system HS toward the condenser 33 Is referred to as primary circuit side double flow HC2.

  When the heat utilization system HS is used as, for example, heating equipment such as underfloor heating or a heater in a house or a heating air conditioner, the heat pump 3 is used as a heater. In this case, as shown in FIG. 2, the flow of the working medium (refrigerant) in the refrigerant circuit RC is circulated in the direction indicated by the arrow in the figure, and from the evaporator 31 to the compressor 32, the condenser 33, It returns to the evaporator 31 through the expansion valve 34 in this order.

  In utilizing the sewage heat as a heat source (using heat) in the heat collecting structure 2 having the above configuration, the heat pump 3 is operated to circulate the working medium in the refrigerant circuit RC. The heating medium is circulated in the primary circuit HC, and the liquid medium is circulated in the secondary circuit TC.

  The sewage heat of the sewage flowing down in the tubular body 200 is collected by the heat exchanger 4 when passing through the tubular body 200. As a result, the temperature of the sewage is lowered, and the secondary circuit side forward flow TC1 in the secondary circuit TC is heated. During steady operation of the heat collection structure 2, the temperature of the sewage flowing down the upstream side of the heat exchanger 4 is about 12 to 20 degrees, and the temperature of the sewage flowing down the downstream side of the heat exchanger 4 (Water temperature after heat collection) was 9 to 17 degrees.

  The heat transfer medium heated by collecting the sewage heat becomes the secondary circuit side forward flow TC1, reaches the evaporator 31, and releases heat to the working medium in the evaporator 31. At this time, the working medium that has received the heat is vaporized. On the other hand, the heat transfer medium that has released the heat becomes the secondary circuit side double flow TC2 in the secondary circuit TC and returns to the heat exchanger 4. That is, in the secondary circuit TC, the heat transfer medium circulates through the secondary circuit TC while repeatedly raising the temperature by receiving sewage heat and lowering the temperature by releasing heat to the working medium. During steady operation of the heat collection structure 2, the liquid temperature of the secondary circuit side forward flow TC1 was about 6 to 14 degrees, and the liquid temperature of the secondary circuit side double flow TC2 was about 3 to 11 degrees.

  The working medium that has vaporized by receiving heat from the liquid medium is introduced into the compressor 32 through the refrigerant circuit RC, and further compressed by being compressed in the compressor 32.

  The working medium compressed by the compressor 32 and heated up reaches the condenser 33 through the refrigerant circuit RC, and releases heat to the heat medium in the condenser 33. At this time, the heating medium that has received heat rises in temperature. On the other hand, the working medium that has released the heat is liquefied, decompressed by the expansion valve 34, and then returned to the evaporator 31. That is, in the refrigerant circuit RC, the working medium circulates through the refrigerant circuit RC while being repeatedly vaporized and liquefied.

  The heat medium that has received heat from the working medium becomes the primary circuit-side forward flow HC1 in the primary circuit HC, reaches the heat utilization system HS, and falls after being used in the heat utilization system HS. The primary circuit side return HC2 is reached again to the condenser 33. That is, the heat medium circulates through the primary circuit HC while repeating the temperature rise due to receiving heat from the working medium and the temperature fall due to heat utilization in the heat utilization system HS. During the steady operation of the heat collecting structure 2, the liquid temperature of the primary circuit side forward flow HC1 was about 35 to 65 degrees, and the liquid temperature of the primary circuit side double flow HC2 was about 25 to 55 degrees.

  As described above, in the heat collecting structure 2, the tubular body 200 is manufactured by spirally winding the tube-forming member 1. Therefore, the tubular body 200 has a tube outer wall. It becomes what was covered with the said heat insulating material 5, and will have heat insulation.

  Accordingly, the sewage is kept warm while passing through the portion where the tubular body 200 is laid, and the diffusion of sewage heat is suppressed. Thus, sewage heat as a heat source can be effectively used.

  Further, since the pipe-making member 1 linings the inner wall surface of the buried pipe 300, the pipe-making member 1 also has an effect of rehabilitating the aged buried pipe 300.

  In this embodiment, the gap between the inner wall surface of the buried pipe 300 and the outer wall surface of the tubular body 200 is filled with a backfilling material to reinforce the tubular body 200. If a back-filling material containing air bubbles such as air mortar is used as the back-filling material, the back-filling material provides further heat insulating properties, and the diffusion of sewage heat is further suppressed.

  In the heat collection structure 2, a sewer pipe is selected as the buried pipe 300, and sewage heat is used as a heat source. However, the buried pipe 300 in which the heat collection structure 2 is constructed includes It is not limited to sewer pipes as long as water is flowing. In the heat collecting structure 2 of the present invention, as the buried pipe 300, for example, various water pipes such as water supply pipes and agricultural water pipes can be selected, and the heat retained by the flowing water flowing through the various water pipes ( Hydrothermal) can be used as a heat source.

  Further, in the heat collecting structure 2, the heat exchanger 4 is arranged on the inner wall surface tube bottom portion of the tubular body 200 in order to efficiently collect the heat of the sewage flowing through the tube bottom portion of the tubular body 200. However, the heat exchanger 4 may be disposed on the tube side wall or the tube top of the tubular body 200.

  Further, in the thermal structure 2 described above, the tubular body 200 is for keeping the sewage flowing down, and the heat exchanger 4 is for collecting the sewage heat of the kept sewage. For this reason, the heat exchanger 4 is not necessarily arranged in the tubular body 200. For example, the heat exchanger 4 may be arranged on the downstream side of the buried pipe 300 where the tubular body 200 is laid, and the sewage heat of sewage after passing through the tubular body 200 may be collected. .

  In this case, in place of the heat exchanger 4, one or more heat exchange tubes along the length direction of the substrate 100 as exemplified in FIGS. 3A to 3C. As shown in FIG. 4, the secondary side tubular body 201 piped using the secondary side pipe making member 11 in which the passage 10 is formed is from a portion where the tubular body 200 is laid in the buried pipe 300. It is preferable that the heat exchange conduit 10 is used as the heat exchanger 4 laid on the downstream side.

  3A is provided with a through-hole penetrating the substrate 100 along the length direction of the substrate 100, and the through-hole is used as a heat exchange conduit. 10 and so on.

  In addition, in the secondary-side pipe-making member 11 shown in FIG. 3B, the heat exchange pipe 10 is a hollow pipe (Sekisui Chemical Co., Ltd., trade name: Eslopex, or trade name: Eslometax). The hollow pipe is provided on the substrate 100 in a state where the hollow pipe is fitted in a groove portion 110 provided on the inner surface side of the substrate 100.

  Further, in the secondary side pipe making member 11 shown in FIG. 3 (c), the heat exchanging pipe line 10 has a plurality of hollow pipes (trade name: Eslopex, or trade name: Esrome manufactured by Sekisui Chemical Co., Ltd.). The plurality of hollow pipes are provided on the substrate 100 in a state of being fitted in the groove portions 110 provided on the inner surface side of the substrate 100.

  The heat exchange conduit 10 is spirally arranged on the tube wall of the secondary tubular body 201 that is manufactured by spirally winding these secondary-side pipe-forming members 11.

  As shown in FIG. 4, the secondary-side tubular body 201 piped using the secondary-side pipe-making member 11 is laid downstream from the portion of the buried pipe 300 where the tubular body 200 is laid. And if the said heat exchange pipe line 10 is utilized as the heat exchanger 4, the heat collection structure 2 of this invention will be constructed | assembled.

  In the heat collecting structure 2, the heat exchanger 4 is disposed in the buried pipe 300 only by forming the secondary tubular body 201 by winding the pipe-making member 1 in the buried pipe 300. be able to.

  Further, since the secondary side pipe making member 11 also lines the inner wall surface of the buried pipe 300, the secondary pipe producing member 11 has an effect of rehabilitating the aged buried pipe 300.

  Further, the secondary tubular body 201 is arranged in a spiral shape so that the heat exchange conduit 10 that functions as the heat exchanger 4 circulates around the tube wall of the secondary tubular body 201. The sewage heat can be effectively collected from the tube bottom portion of the secondary tubular body 201 where the sewage heat is generated most.

  By the way, in the said heat collection structure 2, although the said heat pump 3 is used as a heater in order to utilize the said heat utilization system HS as a heating installation, while the water temperature of sewage is cold compared with an atmospheric temperature in summer, Since it is warm in winter, it can be used not only for heat but also for cold. Therefore, in the summer, the heat utilization system HS can be used as cooling equipment (or a cooling / heating system used throughout the year) by using the heat pump 3 as a refrigerator. When the heat pump 3 is used as a refrigerator, the working medium (refrigerant) in the refrigerant circuit RC may be circulated in the direction opposite to the direction indicated by the arrow in FIG.

  In the present embodiment, the heat collected by the heat exchanger 4 is transferred in the order of the secondary circuit TC, the refrigerant circuit RC, and the primary circuit HC, and then the heat is used in the heat utilization system HS. Although used, in the heat collection structure 2 of the present invention, as shown in FIG. 5, the heat collected by the heat exchanger 4 does not pass through the secondary circuit TC, but enters the refrigerant circuit RC. It may be introduced directly.

  The working medium circulating in the refrigerant circuit RC in the heat collecting structure 2 receives heat and vaporizes when passing through the heat exchanger 4. The vaporized working medium is introduced into the compressor 32 through the refrigerant circuit RC and is compressed in the compressor 32 to further increase the temperature. The working medium compressed by the compressor 32 and heated up reaches the condenser 33 through the refrigerant circuit RC, and releases heat to the heat medium in the condenser 33. The heat medium that has received heat from the working medium reaches the heat utilization system HS via the primary circuit side forward flow HC1 in the primary circuit HC.

  That is, in the heat collecting structure 2 shown in FIG. 5, the heat exchanger 4 also serves as the evaporator 31 and is advantageous in terms of simplification of the system.

<Embodiment 2>
FIG. 6 shows a pipe-making member 1 according to the second embodiment of the present invention. This pipe making member 1 corresponds to the first pipe making member of the present invention.

  The pipe-making member 1 includes a long substrate 100 and a plurality of ribs (short ribs 107 and long ribs 103) provided along the surface length direction of the substrate 100. A polymer foam (in this embodiment, a closed-cell type vinyl chloride resin foam (expanding ratio 30 times)) is produced by continuous extrusion molding.

  Further, in the pipe-making member 1 according to the present embodiment, a heat insulating material 5 made of foamed urethane is further provided between adjacent ribs of the plurality of ribs 103 and 107 provided on the surface side of the substrate 100. Yes. In the present embodiment, the heat insulating material 5 is also provided between the short rib 107 and the inclined side 108.

  That is, in the pipe-making member 1 according to the present embodiment, the substrate 100 is formed of a polymer foam, and the substrate 100 itself is provided with heat insulation.

  The foaming ratio of the polymer foam is preferably 10 to 40 times. If the foaming ratio of the polymer foam is in the range of 10 to 40 times (preferably in the range of 20 to 30 times), after securing the physical strength of the pipe-making member 1, A sufficient heat insulating property can be imparted to the tubular body 200.

  The remainder of the pipe manufacturing member 1 according to the present embodiment is the same as that of the pipe manufacturing member 1 according to the first embodiment.

  Further, the heat collection structure 2 of the present invention constructed using the pipe-making member 1 according to the present embodiment is the same as the heat collection structure 2 described in the first embodiment.

<Embodiment 3>
FIG. 7 shows a member 1 for pipe making according to the third embodiment of the present invention. This pipe-making member 1 corresponds to the second pipe-making member of the present invention.

  The pipe-making member 1 includes a long substrate 100 and a plurality of ribs (short ribs 107 and long ribs 103) provided along the surface length direction of the substrate 100. A polymer foam (in this embodiment, a closed-cell vinyl chloride resin foam (foaming ratio: 20 times)) is produced by continuous extrusion molding.

  That is, in the pipe-making member 1 according to the present embodiment, the substrate 100 is formed of a polymer foam, and the substrate 100 itself is provided with heat insulation.

  The foaming ratio of the polymer foam is preferably 10 to 40 times. If the foaming ratio of the polymer foam is in the range of 10 to 40 times (preferably in the range of 20 to 30 times), after securing the physical strength of the pipe-making member 1, A sufficient heat insulating property can be imparted to the tubular body 200.

  The remainder of the pipe manufacturing member 1 according to the present embodiment is the same as that of the pipe manufacturing member 1 according to the first embodiment.

  Further, the heat collection structure 2 of the present invention constructed using the pipe-making member 1 according to the present embodiment is the same as the heat collection structure 2 described in the first embodiment.

  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. The scope of the present invention is indicated by the claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for the construction of a cooling / heating facility that uses the heat of running water flowing down in a buried pipe buried in the ground as a heat source.

1 Pipe making member 100 Substrate 103 Rib (long rib)
107 ribs (short ribs)
2 Heat Collection Structure 3 Heat Pump 31 Evaporator 32 Compressor 33 Condenser 34 Expansion Valve 4 Heat Exchanger 5 Heat Insulating Material 10 Heat Exchange Pipe 11 Secondary Side Pipe-Forming Member 200 Tubular Body 201 Secondary Side Tubular Body 300 Buried Pipe RC refrigerant circuit HC primary circuit (heat medium circuit)
TC secondary circuit (heat transfer medium circuit)
HS heat utilization system

Claims (5)

A member for pipe making that is spirally wound in an embedded pipe and is piped into a tubular body by sequentially joining adjacent side edges,
A long substrate,
A plurality of ribs provided along the surface length direction of the substrate;
Comprising
A member for pipe making, wherein a heat insulating material is provided between adjacent ribs of a plurality of ribs provided on the surface side of the substrate. In the member for pipe making according to claim 1,
A member for pipe making, wherein at least the substrate is formed of a polymer foam. In the member for pipe making according to claim 2,
A member for pipe making, wherein the polymer foam has an expansion ratio of 10 to 40 times. A member for pipe making that is spirally wound in an embedded pipe and is piped into a tubular body by sequentially joining adjacent side edges,
A long substrate,
A plurality of ribs provided along the surface length direction of the substrate;
Comprising
A pipe-making member, wherein at least the substrate is formed of a polymer foam. Buried pipe,
A tubular body manufactured using the pipe-forming member according to any one of claims 1 to 4 and laid in the buried pipe;
A heat exchanger provided on the downstream side of the tubular body or the position where the tubular body is laid in the buried pipe;
Comprising
The tubular body is for keeping warm running water flowing down the tubular body,
The heat exchanger is a heat collecting structure that collects heat held by running water flowing down in the tubular body or the buried pipe.

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