JP2008089072A - Heat insulation tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heat insulation tube more excellent in heat insulation efficiency, which includes pipes through which hot and cold water pass for the purpose of cooling and heating. <P>SOLUTION: The water flow pipes 11, 12 are arranged in an adiabatic element 13. A plurality of portions of the water flow pipes 11, 12 along the outer peripheries are supported by a plurality of projections 14 inwardly projecting from the adiabatic element. Air layers 15 are formed between the adjacent projections 14, 14 along the outer peripheries of the water flow pipes 11, 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat insulating pipe, for example, a heat insulating pipe provided with piping for passing hot water or cold water for the purpose of heating and cooling.

  In the gas hot water heating system, piping for transferring hot water generated by a heat source to a destination is used. Such piping is known from Patent Document 1, Patent Document 2, and the like.

  A typical configuration of the piping described in these patent documents will be described with reference to FIG. Here, 1 is a forward pipe for water flow, 2 is a return pipe for water flow, and these are constituted by, for example, a crosslinked polyethylene pipe. These two water pipes 1 and 2 are arranged in a state of being arranged side by side as shown in the figure, and then integrated by winding the tape 3. As the tape 3, a laminate of an aluminum foil and a polyethylene terephthalate (PET) layer can be suitably used. In this state, as shown in the figure, the two tubes 1 and 2 are arranged in a shape of a cross section 8 and the tape 3 covering the pipes 1 and 2 is arranged in an oval shape in the cross section. As a result, two spaces 4 and 4 having a triangular cross section are formed between the tape 3 and the tubes 1 and 2. In at least one space 4, a signal line 5 for controlling the gas hot water heating system can be arranged.

Thus, the tubes 1 and 2 integrated with the tape 3 are passed through the sheath tube 6. The sheath tube 6 is formed of, for example, a polyethylene bellows tube. An air layer 7 is formed between the sheath tube 6 and the tubes 1 and 2 integrated with the tape 3, and the heat insulation effect due to the presence of the air layer 7 can be exhibited.
Japanese Patent Laid-Open No. 11-108290 JP 2001-21157 A

  However, the sheath tube 6 and the tubes 1 and 2 made of resin are both easily bent, and there are many places where the surfaces of the tubes 1 and 2 are in contact with the sheath tube 6. In this contact portion, heat is easily transmitted between the pipes 1 and 2 and the sheath pipe 6, and therefore it is difficult to say that heat insulation is reliably performed.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to obtain a heat insulating tube with better heat insulating performance.

  In order to achieve this object, the heat insulation pipe of the present invention has a water flow pipe disposed inside the heat insulation body, and a plurality of protrusions projecting inward from the heat insulation body side at a plurality of positions along the outer circumferential direction of the water flow pipe. And an air layer is formed between adjacent protrusions along the outer circumferential direction of the water pipe.

  With such a configuration, the water pipe is disposed inside the heat insulator, so that the heat insulation action of the heat insulator can be received, and the water pipe is reliably positioned by the protrusion inside the heat insulator. In addition, it is supported and can also receive a heat insulating action by an air layer formed between the protrusions. For this reason, excellent heat insulation performance can be exhibited.

(First embodiment)
1 and 2, reference numeral 11 denotes an outgoing pipe, and reference numeral 12 denotes a return pipe, which are formed by a resin pipe similar to that shown in FIG. 32 and used for water flow. The pair of tubes 11 and 12 are arranged side by side in contact with each other and then covered with a heat insulator 13. The heat insulating body 13 is formed in a letter shape or a bowl shape corresponding to the pair of tubes 11 and 12 arranged side by side as described above. The heat insulator 13 is formed of, for example, a foamed resin in order to exert a heat insulating action. In order to improve the heat insulating performance, the heat insulator 13 is superior in heat insulating property to air other than air, that is, nitrogen or oxygen, for example, carbon dioxide. It is preferable to be configured so as to be foamed and have closed cells.

  On the inner surface of the heat insulator 13, that is, the surface of the heat insulator 13 facing the tubes 11 and 12, projections 14 are integrally formed corresponding to a plurality of positions along the outer circumferential direction of the tubes 11 and 12. 14 supports the tubes 11 and 12. The protrusion 14 can be formed as a continuous ridge along the length direction of the tubes 11 and 12. Further, the protrusion 14 is formed to have a pointed shape in a direction approaching the tubes 11 and 12, and is configured to contact the tubes 11 and 12 with as small an area as possible. For example, as shown in the drawing, the cross section is formed in a triangular shape from the inner surface of the heat insulator 13 toward the outer surfaces of the tubes 11 and 12.

  As described above, the pipes 11 and 12 are supported by the protrusions 14 at a plurality of positions along the outer peripheral direction thereof, so that the protrusions 14 and 14 adjacent to each other along the outer peripheral direction of the pipes 11 and 12 are not protruded. An air layer 15 having a thickness corresponding to the height of 14 is formed over the length direction of the tubes 11 and 12. Comparing the air layer 15 and the heat insulating layer made of the heat insulating body 13, the heat insulating layer is formed with a thickness equivalent to the air layer 15 or thicker than the air layer 15.

  Inside the heat insulator 13, a hole 16 for passing a signal line similar to that shown in FIG. 32 can be formed. The hole portion 16 communicates with the outside of the heat insulating body 13 by a notch 17 extending from the outer surface of the heat insulating body 13 toward the hole portion.

  The surface of the heat insulator 13 may be one in which the foamed resin that is the material of the heat insulator 13 is exposed, or the heat insulator 13 may be covered with an adhesive film. Furthermore, the film can be embossed.

  When manufacturing a heat insulating pipe having such a configuration, the two pipes 11 and 12 are arranged side by side and moved in the length direction while supplying the heat insulating material so as to wrap the periphery of the pipes. What is necessary is just to form the heat insulating body 13 by joining wrapping edge parts by heat sealing | fusion etc. If necessary, the signal line can be inserted into the hole 16 by opening the notch 17 as shown in FIG.

  In this way, the illustrated heat insulating pipe is manufactured. According to this heat insulating pipe, the pipes 11 and 12 are disposed inside the heat insulating body 13 so that the heat insulating action of the heat insulating body 13 is received. Can do. Further, the tubes 11 and 12 can also receive a heat insulating action by the air layer 15 formed between the adjacent protrusions 14 and 14. In addition, the heat insulator 13 is supported in a state where it is reliably positioned by the protrusions 14, so that the surfaces of the tubes 11 and 12 do not contact the inner surface of the heat insulator 13 other than the protrusions 14. 11 and 12 is formed in a shape that is pointed in a direction approaching 11 and 12, and is configured to contact the tubes 11 and 12 with as small an area as possible. Therefore, between the tubes 11 and 12 and the inner surface of the heat insulator 13 and the tube It is difficult to conduct heat between 11, 12 and the protrusion 14, and it is possible to receive a heat insulating action based on the heat transfer preventing effect. For this reason, excellent heat insulation performance can be exhibited.

  As described above, a film is adhered to the outer surface of the heat insulating body 13 and covered with this film, and by embossing as necessary, the outer surface of the heat insulating pipe 13 can be finished beautifully, and the surface of the heat insulating material 13 in particular. Can be protected. In each example described below, an adhesive film can be similarly used as necessary.

  4-6 shows the modification of the heat insulation pipe | tube shown in FIGS. 1-3. Here, the thing of FIG. 4 arrange | positions the pipe | tube 11 and the pipe | tube 12 in the state which spaced apart, and formed the partition wall 18 of the heat insulating body 13 between these pipe | tubes 11 and 12. FIG. In the case of FIG. 5, the tubes 11 and 12 are similarly arranged side by side with a space therebetween, and an air layer 19 is formed between the tubes 11 and 12. In the thing of this FIG. 5, it replaces with the thing of the cross-sectional saddle shape shown in FIGS. 1-4, and the heat insulating body 13 is formed in the cross-sectional oval, ie, an oval shape. In the case of FIG. 6, similarly, the tubes 11 and 12 are arranged side by side with a space therebetween, a partition wall 18 of the heat insulator 13 is formed between the tubes 11 and 12, and the heat insulator 13 is cross-sectionally shown. It is formed in an oval shape.

  7 to 9 show other modified examples of the heat insulating pipe shown in FIGS. 1 to 3. This is because the tubes 11 and 12 are arranged side by side with a space therebetween, an air layer 19 is formed between the tubes 11 and 12, and the heat insulator 13 is similar to that shown in FIGS. The cross section has a bowl shape.

  FIGS. 10-12 shows the further another modification of the heat insulation pipe | tube shown in FIGS. 1-3. In this case, the tubes 11 and 12 are arranged in contact with each other, and the heat insulator 13 is formed in an elliptical cross section.

(Second Embodiment)
13 to 16, reference numeral 11 denotes an outgoing pipe, and reference numeral 12 denotes a return pipe, which have the same configuration as that shown in FIGS. 1 to 12, and are arranged side by side in contact with each other. Reference numeral 13 denotes a heat insulator, which has a bowl shape in cross section. Here, a cavity is provided inside the heat insulator 13 to form an air heat insulating layer 21. As shown in the figure, the air heat insulating layer 21 is preferably formed in a circular arc shape along the outer periphery of the tubes 11 and 12. As shown in the figure, a plurality of air heat insulation layers 21 can be formed by providing appropriate partitions 22, but by forming the notches 17 corresponding to any of the air heat insulation layers 21, the portions are connected to signal lines. It can be used as a hole portion for housing.

  FIGS. 17-19 shows the modification of the heat insulation pipe | tube shown in FIGS. 13-16. In this apparatus, the pipe 11 and the pipe 12 are arranged side by side with a space therebetween, and an air layer 19 is formed between the pipes 11 and 12.

  20 to 22 show other modified examples of the heat insulating pipe shown in FIGS. 13 to 16. In this embodiment, instead of the air layer 19 shown in FIGS. 17 to 19, a partition wall 18 is formed in that portion, and an air heat insulating layer 21 is also formed at a position corresponding to the partition wall 18.

(Third embodiment)
As shown in FIGS. 23 to 24, a support layer 23 for supporting the tubes 11 and 12 is formed between the tubes 11 and 12 and the heat insulator 13. The support layer 23 is formed of a soft resin such as an elastomer or low-density polyethylene, and is adjacent to the protrusion 24 for supporting the tubes 11 and 12 in the same manner as the heat insulator described above. And an air layer 25 formed between the protrusions 24 and 24. Here, the pipe 11 and the pipe 12 are arranged side by side with a space therebetween, and an air layer 26 is formed between the pipes 11 and 12. The support layer 23 is formed in an elliptical cross section, and its outer periphery is similarly covered with a heat insulator 27 having an elliptical cross section. The heat insulator 27 is made of the same foam material as that of the heat insulator 13 described above.

  When manufacturing a heat insulating tube having such a configuration, while arranging the two heat insulating tubes 11 and 12 and moving them in the length direction, supplying the soft resin so as to wrap the periphery of the heat insulating tubes, The wrapping end portions are joined by heat fusion or the like to form the support layer 23, and further, a heat insulating material is supplied so as to wrap around the periphery, and the wrapping end portions of the heat insulating material are joined by heat fusion or the like. Thus, the heat insulator 27 may be formed.

  In the case of the above configuration, when the tubes 11 and 12 are supported by the sharp protrusions 14 in the heat insulator 13 having low rigidity by being a foam as in the first embodiment and the second embodiment. In comparison, reliable support can be provided by the support layer 23 formed of a soft resin that can be more rigid than the foam. Moreover, since the support layer 23 is formed of a soft resin, it can flexibly cope with the case where the heat insulating pipe is bent and piped.

  FIG. 25 shows a modification of the heat insulating tube shown in FIGS. That is, the tubes 11 and 12 are arranged in contact with each other, and the air layer 26 shown in FIG. 23 is not formed.

  FIG. 26 shows another modification of the heat insulating pipe shown in FIGS. That is, the partition wall 28 is formed by the support layer 23 between the pipes 11 and 12 instead of forming the air layer 26 as compared with the case of FIGS.

(Fourth embodiment)
As shown in FIGS. 27 to 30, the outer periphery of the heat insulator 13 is covered with a film 31. On the outer surface of the heat insulator 13, protrusions 32 having a rectangular cross section are formed at a plurality of positions along the outer peripheral direction, and an air layer 33 for heat insulation is provided between the protrusions 32 adjacent to each other in the outer peripheral direction. Is formed. The protrusion 32 and the air layer 33 are formed over the length direction of the heat insulating tube. Other configurations are the same as those shown in FIGS.

  With such a configuration, the film 31 can provide a higher-grade cover than when the heat insulator 13 is exposed. Further, the heat insulating layer 13 can be protected by the film 31. Moreover, since the air layer 33 is formed between the film 31 and the heat insulator 13, a further heat insulating effect can be exhibited.

  FIG. 31 shows a modification of the heat insulating tube shown in FIGS. Here, the heat insulator 13 shown in FIGS. 27 to 30 has a cross-sectional saddle shape, but the cross section of the heat insulator 13 is oval. Other configurations are the same. 29 and 30 show the longitudinal cross-sectional structure of the heat insulating tube shown in FIGS. 27 and 28, the vertical cross-sectional structure of the heat insulating tube of FIG. 31 is the same.

It is a cross-sectional view of the heat insulation pipe | tube of the 1st Embodiment of this invention. It is a perspective view of the heat insulation pipe | tube of FIG. It is a figure which shows a mode that a signal wire | line is mounted | worn with the heat insulation pipe | tube of FIG. It is a cross-sectional view of the modification of the heat insulation pipe | tube of the 1st Embodiment of this invention. It is a cross-sectional view of another modified example of the heat insulation pipe of the first embodiment of the present invention. It is a cross-sectional view of another modification of the heat insulation pipe | tube of the 1st Embodiment of this invention. It is a cross-sectional view of the other modification of the heat insulation pipe | tube of the 1st Embodiment of this invention. It is sectional drawing along the AA in FIG. It is sectional drawing along the BB line in FIG. It is a cross-sectional view of still another modification of the heat insulation pipe of the first embodiment of the present invention. It is sectional drawing along the CC line in FIG. It is sectional drawing along the DD line in FIG. It is a cross-sectional view of the heat insulation pipe | tube of the 2nd Embodiment of this invention. It is a perspective view of the heat insulation pipe | tube of FIG. It is sectional drawing along the EE line in FIG. It is sectional drawing along the FF line in FIG. It is a cross-sectional view of the modification of the heat insulation pipe | tube of the 2nd Embodiment of this invention. It is sectional drawing along the GG line in FIG. It is sectional drawing along the HH line in FIG. It is a cross-sectional view of the other modification of the heat insulation pipe | tube of the 2nd Embodiment of this invention. It is sectional drawing along the JJ line in FIG. It is sectional drawing along the KK line in FIG. It is a cross-sectional view of the heat insulation pipe | tube of the 3rd Embodiment of this invention. It is a perspective view of the heat insulation pipe | tube of FIG. It is a cross-sectional view of the modification of the heat insulation pipe | tube of the 3rd Embodiment of this invention. It is a cross-sectional view of the other modification of the heat insulation pipe | tube of the 3rd Embodiment of this invention. It is a cross-sectional view of the heat insulation pipe | tube of the 4th Embodiment of this invention. It is a perspective view of the heat insulation pipe | tube of FIG. It is sectional drawing along the LL line in FIG. It is sectional drawing along the MM line | wire in FIG. It is a cross-sectional view of the modification of the heat insulation pipe | tube of the 4th Embodiment of this invention. It is a figure which shows the structure of the conventional heat insulation pipe | tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Outgoing pipe 12 Return pipe 13 Heat insulator 14 Protrusion 15 Air layer 23 Support layer 24 Projection 25 Air layer 27 Heat insulator

Claims (1)

  A water pipe is arranged inside the heat insulating body, and a plurality of positions along the outer peripheral direction of the water pipe are respectively supported by a plurality of protrusions protruding inward from the heat insulating body side, and along the outer peripheral direction of the water pipe. A heat insulating tube characterized in that an air layer is formed between adjacent protrusions.

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