JP2007278390A - Fluid pipe with lagging material, lagging material joining method for fluid pipe with lagging material, and lagging material heat fusion tool for fluid pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a gap from generating in a joint of lagging materials in a fluid pipe with a lagging material; and to facilitate heat fusion joining work for the fluid pipe with a lagging material by making use of a lagging material heat fusion tool for a fluid pipe. <P>SOLUTION: In the fluid pipes M1 and M2 in which outer surfaces 23a of inner pipes 23 are covered by the lagging materials 22, the joint 24 joining both opposite end faces 22a by heat fusion is arranged between both lagging materials 22 at both sides in a longitudinal direction of the inner pipe 23. The lagging material heat fusion tool for a fluid pipe provides a heating member capable of mutually opening and closing a pair of heating bodies by supporting the pair of heating bodies so as to be relatively turnable, and forms an insertion hole between both heating bodies while both heating bodies are mutually in a closed condition, and provides a heating surface heated by a heater on both side faces formed on the outer periphery of the insertion hole at both sides in an axial direction of the insertion hole regarding both heating bodies kept closed. The end faces 22a are melted by applying the heating surfaces of both heating bodies to the end faces 22a of the lagging materials 22 while the inner pipes 23 are inserted into the insertion hole. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fluid pipe with a heat insulating material such as an air-conditioning pipe whose outer surface is covered with a heat insulating material, a heat insulating material joining method in the fluid pipe with the heat insulating material, and both divided on both sides in the longitudinal direction of the inner pipe The present invention relates to a heat insulating material heat fusion tool for a fluid pipe used when joining heat insulating materials.

Conventionally, in an air conditioner, when the temperature of the refrigerant passing through the pipe changes more rapidly than the ambient temperature during operation, condensation may occur on the outer surface of the pipe. In order to prevent this dew condensation, a pipe covered with a cylindrical heat insulating material is constructed in accordance with the structure of the building. During the construction, the tubes may be connected to each other, and the heat insulating materials are also joined at the time of the connection. For example, in the following Patent Document 1, a seam sheet is wound around a seam between heat insulating waterproof sheets. In general, in a fluid pipe with a heat insulating material having dew condensation prevention means, as shown in FIG. 5, the heat insulating material 22 made of foamed polyethylene or the like covers the outer surface 23a of the inner pipe 23, and on both sides of the inner pipe 23 in the longitudinal direction. An adhesive tape 29 is wound around the outer periphery of the opposite end faces 22a at the joint 24 between the end faces 22a of the divided heat insulating materials 22.
JP 2001-50481 A

  However, when the heat insulating material 22 contracts due to a construction error or a change over time after the construction, the adhesive tape 29 is peeled off, and a gap is formed in the joint 24 between the two heat insulating materials 22, and the gap between the inner pipe 23 and the outer heat insulating material 22 is formed. In some cases, the surface 23a was exposed to cause condensation. If the condensed water leaked into the building, it caused water leakage.

  Moreover, it may be difficult to insert a cylindrical heat insulating material into the outer periphery of the pipe during construction of the pipe. In such a case, for example, as shown in Patent Document 1 described above, a cut is formed in the heat insulating material 22 extending along the longitudinal direction of the inner tube 23 on both sides in the circumferential direction of the inner tube 23, and the heat retaining material is formed. The material 22 is halved. However, as described above, even if the adhesive tape 29 is wrapped around the heat insulating material 22, a gap is formed in the cut (seam), and the outer surface 23a of the inner tube 23 is exposed in the gap, and condensation may occur there. . If the condensed water leaked into the building, it caused water leakage.

  The present invention relates to a fluid tube with a heat insulating material that is less likely to cause a gap at the joint of the heat insulating material by adopting heat fusion bonding, a heat insulating material joining method in the fluid tube with the heat insulating material, and a fluid tube for performing this heat fusion bonding It aims at providing a heat insulating material heat fusion tool.

  In the fluid pipe with a heat insulating material according to the invention of claim 1, the outer surfaces of the inner pipe are covered with the heat insulating material, and both the end faces opposite to each other in the longitudinal direction between the two heat insulating materials divided on both sides in the longitudinal direction of the inner pipe. Are joined by heat-sealing them together. In the joint, it is preferable that the end surfaces of both heat insulating materials are heat-sealed over the entire outer periphery of the inner tube. Therefore, even if the heat insulation material shrinks due to construction errors or changes over time after construction, the end surfaces of both heat insulation materials that are heat-sealed with each other are difficult to separate from each other, and there is a gap in the seam between the heat insulation materials. Hard to occur.

  In the heat insulating material joining method in the fluid pipe with a heat insulating material according to the invention of claim 2, the longitudinal direction between the two heat insulating materials divided on both sides in the longitudinal direction of the inner pipe in a state where the outer surface of the inner tube is covered with the heat insulating material. After both end faces facing each other are heat-melted, a seam is formed by heat-sealing both end faces. Therefore, as in the first aspect of the invention, a gap is unlikely to occur at the seam between the two heat insulating materials.

  In the heat insulating material heat fusion tool for fluid pipes according to the invention of claim 3, a heating member capable of opening and closing a plurality of heating bodies is provided, and each heating body is closed between each heating body in a closed state. A heating surface in which at least one side surface is formed on the outer periphery of the insertion hole on both sides in the axial direction of the insertion hole in each heating body in the closed state. Is provided. Therefore, when joining both the heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the inner tube is fitted into the insertion hole of the heating body in the closed state of the heating member. These side surfaces can be applied to the end surface of the heat insulating material as a heating surface to melt the end surface.

  According to a fourth aspect of the invention based on the third aspect of the present invention, the heating member includes a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center portion and are opened and closed with respect to each other. In the body, a split hole for forming the insertion hole is formed in the split edge portions facing each other in the rotation direction around the rotation center line in the rotation center portion. Therefore, the heating members can be collected in a compact manner.

  According to a fifth aspect of the present invention, there is provided a heat insulating material heat-sealing device for a fluid pipe, comprising a heating member having a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center and can be opened and closed with respect to each other. A heating surface that generates heat by the heating means is provided on at least one of the two side surfaces provided on both heating bodies on both sides of the central portion in the direction of the rotation center line. Therefore, when joining both heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the side surface of the heating body is applied to the end surface of the heat insulating material as the heating surface in the closed state of the heating member. Thus, the end face can be melted. Moreover, a heating member can be put together compactly.

  In the invention of claim 6 premised on the invention of claim 4 or claim 5, the heating direction of the two heating elements is in a closed state in which the heating surfaces are closed to each other, and the rotation direction about the rotation center line in the rotation center portion Is provided throughout. Therefore, the heat-sealing area between the end surfaces of both heat insulating materials can be expanded.

  In the invention of claim 7 premised on the invention according to any one of claims 4 to 6, the heating member is supported by a holder, and the holder opens and closes the heating elements relative to each other. Means are provided. Therefore, when the holder is gripped and the opening / closing operation means is operated, both the heating elements can be opened and closed.

  In the fluid pipe with a heat insulating material according to the invention of claim 8 based on the invention of claim 1, the heat insulating material formed with a cut extending between both end surfaces along the longitudinal direction of the inner pipe is provided in the circumferential direction of the inner pipe. A seam is provided in which the opposite cut surfaces are joined together by heat fusion. For example, the heat insulating material is divided into a pair of halves by both cuts formed in the heat insulating material on both sides in the circumferential direction of the inner tube. In the joint, it is preferable that both cut surfaces are heat-sealed in the entire cut. Therefore, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction by cutting, and the two cut surfaces that are heat-sealed with each other are difficult to separate from each other, so that a gap is not easily formed at the seam of the heat insulating material.

  In the heat insulating material joining method for a fluid pipe with a heat insulating material according to the invention of claim 9, both ends along the longitudinal direction of the inner pipe on both sides in the circumferential direction of the inner pipe in a state where the outer surface of the inner pipe is covered with the heat insulating material. In the heat insulating material in which both incisions extending between the surfaces are formed, both the incising surfaces facing each other in the circumferential direction of the inner pipe are thermally melted, and then the seams are formed by thermally fusing both the incising surfaces to each other. Further, a seam is provided in which the end faces of the two heat insulating materials are bonded together by heat insulation in the heat insulating material joining method in the fluid pipe with the heat insulating material according to claim 2. Therefore, similarly to the invention of claim 8, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction, and a gap is not easily generated at the seam of the heat insulating material.

  In the fluid pipe with a heat insulating material according to the invention of claim 10, in the fluid pipe in which the outer surface of the inner pipe is covered with the heat insulating material, the heat insulating material in which a cut extending along the longitudinal direction of the inner pipe is formed is the circumference of the inner pipe. A seam is provided in which cut surfaces facing each other in the direction are joined together by heat fusion. For example, the heat insulating material is divided into a pair of halves by both cuts formed in the heat insulating material on both sides in the circumferential direction of the inner tube. In the joint, it is preferable that both cut surfaces are heat-sealed in the entire cut. Therefore, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction by cutting, and the two cut surfaces that are heat-sealed with each other are difficult to separate from each other, so that a gap is not easily formed at the seam of the heat insulating material. By the way, after the outer surface of the inner tube is covered with a heat insulating material, both the cut surfaces facing each other in the circumferential direction of the inner tube are thermally melted in the heat insulating material formed with a cut extending along the longitudinal direction of the inner tube. A seam is formed by joining both the cut surfaces to each other by heat fusion.

  In the heat pipe with the heat insulating material and the heat insulating material joining method in the fluid pipe with the heat insulating material according to the present invention, it is difficult to generate a gap at the seam of the heat insulating material by adopting heat fusion bonding. Moreover, it becomes easy to perform the heat sealing | fusion joining operation | work with respect to this fluid pipe | tube with a heat insulating material using the heat insulating material heat sealing | fusion tool for fluid pipes concerning this invention.

First, a heat insulating material heat fusion tool for fluid pipes according to a first embodiment of the present invention will be described with reference to FIGS.
A heating member 2 is attached to the outside of the head 1 a of the holder 1. The heating member 2 is vertically moved by an upper heating body 4 attached to an arm portion 3 integrally extending from the head portion 1a and a support shaft 5 serving as a rotation center portion of the head portion 1a. And a lower heating body 7 attached to the arm portion 6 supported to be rotatable in the direction. Each of the upper heating body 4 and the lower heating body 7 has a plate shape having a semicircular outer peripheral edge, and is formed mainly of a metal that is easily heated. A semicircular split hole 9 is formed in the split edge portions 8 of the upper and lower heating bodies 4 and 7 facing each other in the rotation direction X about the rotation center line 5a of the support shaft 5.

  The opening / closing operation means 10 assembled in the holder 1 mainly includes a link mechanism. In this opening / closing operation means 10, an operation button 12 urged by a compression coil spring 11 at a gripping portion 1 b is supported so as to be able to reciprocate, and a lever that rotates integrally with the arm portion 6 about the support shaft 5. A link 14 is connected to the operation button 12 and the lever 13 by pivots 14a and 14b between the operation button 12 and the operation button 12. Therefore, when the operation button 12 is pressed against the elastic force of the compression coil spring 11 toward the inside of the gripping portion 1 b, the arm portion 6 moves the rotation center line 5 a of the support shaft 5 through the link 14 and the lever 13. The heating member 2 is in an open state P in which the lower heating body 7 is rotated downward relative to the upper heating body 4 and is opened downward. When the operation button 12 is released, the operation button 12 returns to the outside of the grip portion 1 b by the elastic force of the compression coil spring 11, and the arm portion 6 rotates around the support shaft 5 via the link 14 and the lever 13. The heating member 2 is turned upward about the moving center line 5 a, and the heating member 2 is in a closed state Q in which the lower heating body 7 is rotated upward relative to the upper heating body 4.

  In the closed state Q of the heating member 2, the split edge portions 8 of the upper and lower heating bodies 4 and 7 are superposed on each other, the heating member 2 forms a disk shape, and the split edge portion 8 is formed at the center of the heating member 2. A circular insertion hole 15 is formed by the dividing hole 9, and a circular side surface 16 is formed on the entire outer periphery of the insertion hole 15 on both sides in the axial direction of the insertion hole 15 in the heating member 2. In both the upper and lower heating elements 4 and 7, a heater 17 is built in the holder 1 by a hot wire as a heating means connected to an electric wiring (not shown), and both side surfaces 16 generate heat by the heater 17 and function as a heating surface. . Further, in the open state P of the heating member 2, the split edges 8 of the upper and lower heating bodies 4 and 7 are separated from each other, and the split holes 9 forming the insertion holes 15 in the closed state Q are also separated from each other. An insertion / removal allowable space S can be formed between the split edges 8.

  Next, the heat insulating material heat fusion tool for fluid pipes according to the second embodiment of the present invention will be described with reference to FIGS. 2 (a) and 2 (b), focusing on the differences from the first embodiment. In the second embodiment, the opening / closing operation means 10 assembled in the holder 1 is changed as follows.

  A lower heating body 7 is attached to an arm portion 6 supported by a head 1 a of the holder 1 so as to be pivotable in the vertical direction by a support shaft 5, and the support 5 is supported by a head 1 a of the holder 1. The upper heating body 4 is attached to the arm portion 3 supported so as to be rotatable in the vertical direction. A link 18 is rotatably supported by the support shaft 18a with respect to the lever 13 that rotates integrally with the arm portion 6 about the rotation center line 5a of the support shaft 5. A link 20 is rotatably supported by a support shaft 20a with respect to a lever 19 that rotates integrally with the arm portion 3 around a moving center line 5a. Between the links 18 and 20 and the operation button 12, a link 21 is rotatably connected to the operation button 12 and the links 18 and 20 by support shafts 21a and 21b. Accordingly, when the operation button 12 is pushed against the elastic force of the compression coil spring 11 toward the inside of the gripping portion 1b, the arm portions 3, 3 are connected via the link 21, the links 18, 20 and the levers 13, 19. 6 rotates about the rotation center line 5a of the support shaft 5, and the heating member 2 is in an open state P in which the upper heating body 4 and the lower heating body 7 rotate together to open each other. When the operation button 12 is released, the operation button 12 returns to the outside of the grip portion 1b by the elastic force of the compression coil spring 11, and the link 21, the links 18, 20 and the levers 13, 19 are used. Both arm portions 3 and 6 rotate about the rotation center line 5a of the support shaft 5, and the heating member 2 is in a closed state in which the upper heating body 4 and the lower heating body 7 rotate together and close to each other. Q.

Next, a fluid tube with a heat insulating material joined using the heat insulating material heat fusion tool for the fluid tube will be described with reference to FIGS. 3 (a), (b), (c), (d) and FIG.
As shown in FIG. 3A, the fluid pipes M1 and M2 in which the outer surface 23a of the inner pipe 23 made of resin, copper, or the like is covered with a cylindrical heat insulating material 22 made of a heat insulating material such as polyethylene foam, The tube 23 is divided on both sides in the longitudinal direction. By opening a gap G between the outer surface 23a of the inner tube 23 and the inner peripheral surface of the heat insulating material 22, the inner tube 23 can be easily inserted into the heat insulating material 22 at the expanded portion or the bent portion. When these fluid pipes M1 and M2 are connected to each other, first, as shown in FIG. 3B, the heat insulating material 22 is moved in the longitudinal direction with respect to the inner pipe 23 so that the heat insulating materials 22 face each other. While separating the end surfaces 22a from each other, the inner pipes 23 exposed between the two heat insulating materials 22 are connected to each other. Next, the heating member 2 of the heat fusion tool shown in FIGS. 1 and 2 is opened P, and the inner tube 23 is inserted into the insertion / removal allowable space S between the split edges 8 of the upper and lower heating bodies 4 and 7. Thereafter, when the heating member 2 is brought into the closed state Q, the inner tube 23 is fitted into the insertion hole 15. Thereafter, as shown in FIG. 3 (c), when the end surfaces 22a of the two heat insulating materials 22 are pressed against the both side surfaces 16 of the upper and lower heating bodies 4 and 7 in the heating member 2, the end surfaces 22a are simultaneously heated and melted. The Next, when the heating member 2 is in the open state P and the inner tube 23 is removed from the insertion / removal allowable space S between the split edges 8 of the upper and lower heating bodies 4, as shown in FIG. The end surfaces 22a of the two heat insulating materials 22 are opposed to each other in the longitudinal direction. Since the side surfaces 16 of the upper and lower heating bodies 4 and 7 are coated with fluororesin, the side surfaces 16 can be easily separated from the end surface 22 a of the heat insulating material 22. A fluororesin coating sheet may be attached to the side surface 16 so as to be replaceable in accordance with a decrease in durability. As shown in FIG. 4, when the end surfaces 22a of the two heat insulating materials 22 in the molten state are pressed against each other immediately after the heating member 2 of the heat fusion tool 2 is removed from the end surfaces 22a of the two heat insulating materials 22 in this way. The both end faces 22a are heat-sealed and joined together, and a seam 24 is formed on the entire outer periphery of the inner tube 23 by heat-sealing.

  As shown in FIGS. 6 (a) and 6 (b), the outer surface 23a of the inner tube 23 made of resin, copper or the like is covered with a gap G with a cylindrical heat insulating material 22 made of a heat insulating material such as polyethylene foam. In the heat insulating material 22 of the fluid pipes M1 and M2, cuts 25 extending between both end faces 22a along the longitudinal direction of the inner pipe 23 are formed on both sides of the inner pipe 23 in the circumferential direction. The heat insulating material 22 is divided into a pair of halves 26 and 27 by the both cuts 25. In the both cuts 25, both halves 26 and 27 have cut surfaces 26 a and 27 a that face each other in the circumferential direction of the inner tube 23. When these cut surfaces 26a and 27a are heat-melted and then pressed against each other, both the cut surfaces 26a and 27a become a seam 28 that is heat-sealed and joined. When the heat insulating material 22 is divided into halves 26 and 27 in this way, the inner tube 23 can be easily inserted into the heat insulating material 22 during construction. After that, as shown in FIGS. 3A, 3B, 3C, and 4D, and FIG. 4, a seam 24 is provided in which the end surfaces 22a of both heat insulating materials 22 are bonded together by heat fusion.

This embodiment has the following features.
* Since the end surfaces 22a of the two heat insulating materials 22 are bonded by heat fusion to each other, the end surfaces 22a are not easily separated from each other, and a gap is less likely to occur in the joint 24 between the two heat insulating materials 22. Therefore, condensation is unlikely to occur on the outer surface 23a of the inner tube 23, and the occurrence of water leakage can be prevented. In the seam 24, since the end surfaces 22a of both heat insulating materials 22 are heat-sealed over the entire outer periphery of the inner tube 23, a gap is further less likely to occur.

  * Since the inner tube 23 is fitted in the insertion hole 15 between the upper and lower heating bodies 4 and 7 in the closed state Q of the heating member 2, both the upper and lower heating are performed while the heating member 2 is stably held with respect to the inner tube 23. The side surface 16 of the bodies 4 and 7 can be used as a heating surface and applied to the end surface 22a of the heat insulating material 22 to melt the end surface 22a, thereby facilitating the work. Further, since the side surfaces 16 of the upper and lower heating bodies 4 and 7 are on the entire outer periphery of the inner tube 23, the heat-sealing area between the end surfaces 22a of the both heat insulating materials 22 can be increased.

  * When the holder 1 is gripped and the opening / closing operation means 10 is operated, the upper and lower heating bodies 4 and 7 can be opened and closed with respect to each other without directly touching the upper and lower heating bodies 4 and 7, thereby facilitating the operation.

  * Since the cut surfaces 26a and 27a are bonded to each other at the notch 25 of the heat insulating material 22, the cut surfaces 26a and 27a are difficult to separate from each other, and a gap is formed in the joint 28 of the heat insulating material 22. Is less likely to occur. Therefore, condensation is unlikely to occur on the outer surface 23a of the inner tube 23, and the occurrence of water leakage can be prevented. At the seam 28, since both the cut surfaces 26 a and 27 a of the heat insulating material 22 are heat-sealed over the entire longitudinal direction of the cut 25, a gap is further less likely to occur.

In addition to the above embodiment, the following configuration may be used.
* Heating means in the heating member 2 may be any heating means that can heat the side surfaces 16 of the upper and lower heating bodies 4 and 7 instead of the heater 17 using heat rays. Hot air by gas can be ejected from the small holes, or the power source of the heater 17 can be a battery. Further, a paste made of tungsten or molybdenum powder and printed almost uniformly on the entire surface of alumina is adopted as a resistor in place of the heat ray.

* As the heating member 2, a plurality of heating bodies that are separable from each other in the open state are assembled to each other in the closed state and attached to the inner tube 23.
* As the opening / closing operation means 10 for the heating member 2, a finger pad that can open and close both the upper and lower heating bodies 4, 7 is provided instead of the link mechanism described above.

  * In the above embodiment, the upper and lower heating elements 4 and 7 of the heating member 2 have a circumferential angle of 180 degrees. However, for example, the upper and lower heating elements 4 and 7 may be formed at a circumferential angle of 90 degrees. Good. In that case, the insertion hole 15 formed between the upper and lower heating bodies 4 and 7 in the closed state Q becomes a space opened to the outside, and the inner tube 23 inserted in the space is sandwiched between the upper and lower heating bodies 4 and 7. It is. The heating member 2 is rotated in a state where the side surfaces 16 of the upper and lower heating bodies 4 and 7 are in contact with the end surface 22a of the heat insulating material 22, and the end surface 22a is melted.

(A) is a partially cutaway side view schematically showing a closed state of a heating member in the heat insulating material heat fusion tool for fluid pipes according to the first embodiment, and (b) schematically shows an open state. It is a partially cutaway side view. (A) is a partially cutaway side view schematically showing a closed state of a heating member in a heat insulating material heat fusion tool for fluid pipes according to a second embodiment, and (b) also schematically shows an open state. It is a partially cutaway side view. (A) (b) (d) is a partial cross-sectional view showing the process of joining the separated fluid pipes with a heat insulating material together using the heat insulating material heat fusion tool for these fluid pipes as seen from the front side; (C) is also a partial front view. It is a longitudinal cross-sectional view which shows a part of fluid pipe | tube with a heat insulating material concerning this embodiment. It is a longitudinal cross-sectional view which shows a part of conventional fluid pipe | tube with a heat insulating material. (A) is a longitudinal cross-sectional view which shows a part of fluid pipe | tube with a heat insulating material concerning this embodiment, (b) is a cross-sectional view similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Holder, 2 ... Heating member, 4 ... Heating body, 5 ... Support shaft as rotation center part, 5a ... Turning center line, 7 ... Heating body, 8 ... Split edge part, 9 ... Split hole, 10 ... Opening / closing operation means, 15 ... insertion hole, 16 ... side face as heating surface, 17 ... heater as heating means, 22 ... heat insulating material, 22a ... end face, 23 ... inner tube, 23a ... outer surface, 24 ... seam, 25 ... Incision, 26a, 27a ... cutting surface, 28 ... seam, M1, M2 ... fluid pipe, P ... open state, Q ... closed state, X ... rotation direction.

The present invention relates to a heat insulating material heat fusion tool for a fluid pipe to be used when joining both heat insulating materials divided on both sides in the longitudinal direction of the inner pipe in an air conditioning pipe or the like whose outer surface is covered with a heat insulating material, The present invention relates to a heat insulating material joining method in a fluid pipe with a heat insulating material, which is performed using this heat fusion tool .

The present invention, its heat bonding work is performed easily fluid pipe insulation material heat Chakugu in thermal insulation material with a fluid pipe hardly a gap between the end faces of both heat insulating material Ri by the adoption of heat bonding, heat It aims at providing the heat insulating material joining method in the fluid pipe | tube with a heat insulating material performed using a welding tool .

In the heat insulating material heat fusion tool for a fluid pipe according to the first aspect of the present invention, a heating member capable of opening and closing a plurality of heating bodies is provided, and each heating body is closed between each heating body in a closed state. insertion hole is formed, and this in each heating element in the closed state on both sides formed on the outer periphery of the insertion hole at both sides in the axial line direction of the insertion hole provided with a heating surface which is heated by heating means. Therefore, when joining both the heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the inner tube is fitted into the insertion hole of the heating body in the closed state of the heating member. These side surfaces can be applied to the end surface of the heat insulating material as a heating surface to melt the end surface.

According to a second aspect of the invention based on the first aspect of the present invention, the heating member includes a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center portion and are opened and closed with respect to each other. In the body, a split hole for forming the insertion hole is formed in the split edge portions facing each other in the rotation direction around the rotation center line in the rotation center portion. Therefore, the heating members can be collected in a compact manner.

According to a third aspect of the present invention, there is provided a heat insulating material heat fusion tool for a fluid pipe, comprising a heating member having a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center portion and can be opened and closed with respect to each other. Heating surfaces that generate heat by the heating means are provided on both side surfaces provided on both heating bodies on both sides of the central portion in the direction of the rotation center line. Therefore, when joining both heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the side surface of the heating body is applied to the end surface of the heat insulating material as the heating surface in the closed state of the heating member. Thus, the end face can be melted. Moreover, a heating member can be put together compactly.

In the invention of claim 4 that assumes the invention of claim 1 or claim 2 or claim 3, wherein the heating member is supported by the holder, the opening and closing means for closed open both heating body to one another in the holder Provided. Therefore, when the holder is gripped and the opening / closing operation means is operated, both the heating elements can be opened and closed.

In the invention of claim 5 premised on the invention of any one of claims 1 to 4, a fluororesin coating sheet is attached to both side surfaces of each heating body or a fluororesin coating process is performed. Has been given. Therefore, it is easy to separate the side surface from the end surface of the heat insulating material.
In the invention of claim 6, the heat insulating material in the fluid pipe with the heat insulating material is joined by the following method.
The end surfaces of the two heat insulating materials are opposed to each other in the longitudinal direction between the two heat insulating materials divided on both sides in the circumferential direction of the inner tube in a state where the outer surface of the inner tube is covered with the heat insulating material. The heating member in the heat insulating material heat fusion tool for fluid pipes according to any one of the claims is closed between the end surfaces of the two heat insulating materials, and the end surfaces of the two heat insulating materials on both side surfaces of each heating body of the heating member After pressing and heat-melting, the end faces of the two heat insulating materials opposed to each other are pressed against each other with the heating member opened, and the end faces of the two heat insulating materials are heat-sealed to provide a joint. Therefore, even if the heat insulation material shrinks due to construction errors or changes over time after construction, the end surfaces of both heat insulation materials that are heat-sealed with each other are difficult to separate from each other, and there is a gap in the seam between the heat insulation materials. Hard to occur.

The present invention relates to a heat insulating material heat fusion tool for a fluid pipe that facilitates heat fusion joining work in a fluid pipe with a heat insulation material in which a gap is not easily formed between the end faces of both heat insulation materials by adopting heat fusion joining, It is possible to provide a heat insulating material joining method in a fluid pipe with a heat insulating material performed using a tool.

Next, a fluid tube with a heat insulating material joined using the heat insulating material heat fusion tool for the fluid tube will be described with reference to FIGS. 3 (a), (b), (c), (d) and FIG.
As shown in FIG. 3A, the fluid pipes M1 and M2 in which the outer surface 23a of the inner pipe 23 made of resin, copper, or the like is covered with a cylindrical heat insulating material 22 made of a heat insulating material such as polyethylene foam, The tube 23 is divided on both sides in the longitudinal direction. By opening a gap G between the outer surface 23a of the inner tube 23 and the inner peripheral surface of the heat insulating material 22, the inner tube 23 can be easily inserted into the heat insulating material 22 at the expanded portion or the bent portion. When these fluid pipes M1 and M2 are connected to each other, first, as shown in FIG. 3B, the heat insulating material 22 is moved in the longitudinal direction with respect to the inner pipe 23 so that the heat insulating materials 22 face each other. While separating the end surfaces 22a from each other, the inner pipes 23 exposed between the two heat insulating materials 22 are connected to each other. Next, the heating member 2 of the heat fusion tool shown in FIGS. 1 and 2 is opened P, and the inner tube 23 is inserted into the insertion / removal allowable space S between the split edges 8 of the upper and lower heating bodies 4 and 7. Thereafter, when the heating member 2 is brought into the closed state Q, the inner tube 23 is fitted into the insertion hole 15. Thereafter, as shown in FIG. 3 (c), when the end surfaces 22a of the two heat insulating materials 22 are pressed against the both side surfaces 16 of the upper and lower heating bodies 4 and 7 in the heating member 2, the end surfaces 22a are simultaneously heated and melted. The Next, when the heating member 2 is in the open state P and the inner tube 23 is removed from the insertion / removal allowable space S between the split edges 8 of the upper and lower heating bodies 4, as shown in FIG. The end surfaces 22a of the two heat insulating materials 22 are opposed to each other in the longitudinal direction. Since the side surfaces 16 of the upper and lower heating bodies 4 and 7 are coated with fluororesin, the side surfaces 16 can be easily separated from the end surface 22 a of the heat insulating material 22. A fluororesin coating sheet may be attached to the side surface 16 so as to be replaceable in accordance with a decrease in durability. When the end surfaces 22a of the two heat insulating materials 22 in the molten state are pressed against each other immediately after the heating member 2 of the heat fusion tool is removed from the end surfaces 22a of the two heat insulating materials 22 in this way, as shown in FIG. Further, both end faces 22a are heat-sealed and joined together, and a seam 24 is formed on the entire outer periphery of the inner tube 23 by heat-sealing.

The present invention relates to a fluid pipe with a heat insulating material such as an air-conditioning pipe whose outer surface is covered with a heat insulating material, a heat insulating material joining method in the fluid pipe with the heat insulating material, and both divided on both sides in the longitudinal direction of the inner pipe it relates insulation material heat Chakugu fluid tube utilized in joining between heat insulating material.

Moreover, it may be difficult to insert a cylindrical heat insulating material into the outer periphery of the pipe during construction of the pipe. In such a case, for example, as shown in Patent Document 1 described above, a cut is formed in the heat insulating material 22 extending along the longitudinal direction of the inner tube 23 on both sides in the circumferential direction of the inner tube 23, and the heat retaining material is formed. The material 22 is halved. However, as described above, even if the adhesive tape 29 is wrapped around the heat insulating material 22, a gap is formed in the cut (seam), and the outer surface 23a of the inner tube 23 is exposed in the gap, and condensation may occur there. . If the condensed water leaked into the building, it caused water leakage.

The present invention relates to a fluid tube with a heat insulating material that is less likely to cause a gap at the joint of the heat insulating material by adopting heat fusion bonding , a heat insulating material joining method in the fluid tube with the heat insulating material, and a fluid tube for performing this heat fusion bonding It aims at providing a heat insulating material heat fusion tool .

In the fluid pipe with a heat insulating material according to the invention of claim 1, the outer surfaces of the inner pipe are covered with the heat insulating material, and both the end faces opposite to each other in the longitudinal direction between the two heat insulating materials divided on both sides in the longitudinal direction of the inner pipe. Are joined by heat-sealing them together. In the joint, it is preferable that the end surfaces of both heat insulating materials are heat-sealed over the entire outer periphery of the inner tube. Therefore, even if the heat insulation material shrinks due to construction errors or changes over time after construction, the end surfaces of both heat insulation materials that are heat-sealed with each other are difficult to separate from each other, and there is a gap in the seam between the heat insulation materials. Hard to occur.

In the heat insulating material joining method in the fluid pipe with the heat insulating material according to the invention of claim 2, the longitudinal direction between the two heat insulating materials divided on both sides in the longitudinal direction of the inner tube in a state where the outer surface of the inner tube is covered with the heat insulating material. After both end faces facing each other are heat-melted, a seam is formed by heat-sealing both end faces. Therefore, as in the first aspect of the invention, a gap is unlikely to occur at the seam between the two heat insulating materials.

The fluid pipe insulation material heat Chakugu according to the invention of claim 3, comprising a heating element capable of opening and closing a plurality of heating bodies from each other, between the respective heating element in a closed closed together the respective heating element A heating surface in which at least one side surface is formed on the outer periphery of the insertion hole on both sides in the axial direction of the insertion hole in each heating body in the closed state. Is provided. Therefore, when joining both the heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the inner tube is fitted into the insertion hole of the heating body in the closed state of the heating member. These side surfaces can be applied to the end surface of the heat insulating material as a heating surface to melt the end surface.

According to a fourth aspect of the invention based on the third aspect of the present invention, the heating member includes a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center portion and are opened and closed with respect to each other. In the body, a split hole for forming the insertion hole is formed in the split edge portions facing each other in the rotation direction around the rotation center line in the rotation center portion. Therefore, the heating members can be collected in a compact manner.

According to a fifth aspect of the present invention, there is provided a heat insulating material heat-sealing device for a fluid pipe, comprising a heating member having a pair of heating bodies that are supported so as to be relatively rotatable at a rotation center and can be opened and closed with respect to each other. A heating surface that generates heat by the heating means is provided on at least one of the two side surfaces provided on both heating bodies on both sides of the central portion in the direction of the rotation center line. Therefore, when joining both heat insulating materials separated in the fluid pipe with the heat insulating material whose outer surface is covered with the heat insulating material, the side surface of the heating body is applied to the end surface of the heat insulating material as the heating surface in the closed state of the heating member. Thus, the end face can be melted. Moreover, a heating member can be put together compactly.

In the invention of claim 6 premised on the invention of claim 4 or claim 5, the heating direction of the two heating elements is in a closed state in which the heating surfaces are closed to each other, and the rotation direction about the rotation center line in the rotation center portion Is provided throughout. Therefore, the heat-sealing area between the end surfaces of both heat insulating materials can be expanded.
In the invention of claim 7 based on the invention of claim 4 or claim 5 or claim 6, a fluororesin coating sheet is attached or subjected to fluororesin coating processing on both side surfaces of each heating element. . Therefore, it is easy to separate the side surface from the end surface of the heat insulating material.

In the invention of claim 8 based on the invention of any one of claims 4 to 7 , the heating member is supported by a holder, and the holder is an opening / closing operation means for opening and closing both heating bodies. Is provided. Therefore, when the holder is gripped and the opening / closing operation means is operated, both the heating elements can be opened and closed.

In the fluid pipe with a heat insulating material according to the invention of claim 9 based on the invention of claim 1, the heat insulating material formed with a cut extending between both end surfaces along the longitudinal direction of the inner pipe is provided in the circumferential direction of the inner pipe. A seam is provided in which the opposite cut surfaces are joined together by heat fusion. For example, the heat insulating material is divided into a pair of halves by both cuts formed in the heat insulating material on both sides in the circumferential direction of the inner tube. In the joint, it is preferable that both cut surfaces are heat-sealed in the entire cut. Therefore, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction by cutting, and the two cut surfaces that are heat-sealed with each other are difficult to separate from each other, so that a gap is not easily formed at the seam of the heat insulating material.

In the heat insulating material joining method in the fluid pipe with a heat insulating material according to the invention of claim 10, both ends along the longitudinal direction of the inner pipe on both sides in the circumferential direction of the inner pipe in a state where the outer surface of the inner pipe is covered with the heat insulating material. In the heat insulating material in which both incisions extending between the surfaces are formed, both the incising surfaces facing each other in the circumferential direction of the inner pipe are thermally melted, and then the seams are formed by thermally fusing both the incising surfaces to each other. Further, a seam is provided in which the end faces of the two heat insulating materials are bonded together by heat insulation in the heat insulating material joining method in the fluid pipe with the heat insulating material according to claim 2. Therefore, similarly to the ninth aspect of the invention, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction, and it is difficult for a gap to be formed at the seam of the heat insulating material.

In the fluid pipe with a heat insulating material according to the invention of claim 11, in the fluid pipe in which the outer surface of the inner pipe is covered with the heat insulating material, the heat insulating material formed with a cut extending along the longitudinal direction of the inner pipe has a circumference of the inner pipe. A seam is provided in which cut surfaces facing each other in the direction are joined together by heat fusion. For example, the heat insulating material is divided into a pair of halves by both cuts formed in the heat insulating material on both sides in the circumferential direction of the inner tube. In the joint, it is preferable that both cut surfaces are heat-sealed in the entire cut. Therefore, it is easy to insert the heat insulating material into the outer periphery of the inner pipe at the time of construction by cutting, and the two cut surfaces that are heat-sealed with each other are difficult to separate from each other, so that a gap is not easily formed at the seam of the heat insulating material. By the way, after the outer surface of the inner tube is covered with a heat insulating material, both the cut surfaces facing each other in the circumferential direction of the inner tube are thermally melted in the heat insulating material formed with a cut extending along the longitudinal direction of the inner tube. A seam is formed by joining both the cut surfaces to each other by heat fusion.

In the heat pipe with the heat insulating material and the heat insulating material joining method in the fluid pipe with the heat insulating material according to the present invention, it is difficult to generate a gap at the seam of the heat insulating material by adopting heat fusion bonding. Moreover, it becomes easy to perform the heat sealing | fusion joining operation | work with respect to this fluid pipe | tube with a heat insulating material using the heat insulating material heat sealing | fusion tool for fluid pipes concerning this invention.

Claims (10)

In a fluid pipe in which the outer surface of the inner pipe is covered with a heat insulating material, a seam in which both end faces opposite to each other in the longitudinal direction are bonded together by heat fusion between the heat insulating materials divided on both sides in the longitudinal direction of the inner pipe. A fluid tube with a heat insulating material, characterized by being provided. In the state where the outer surface of the inner tube is covered with a heat insulating material, both end surfaces opposite to each other in the longitudinal direction between the heat insulating materials divided on both sides in the longitudinal direction of the inner tube are heat-melted, and then both end surfaces are heat-melted to each other. A method for joining a heat insulating material in a fluid pipe with a heat insulating material, characterized in that a seam joined by bonding is provided. A heating member capable of opening and closing a plurality of heating bodies is provided, and an insertion hole is formed between the heating bodies in the closed state where the heating bodies are closed to each other. A heat insulating material heat-sealing device for fluid pipes, wherein a heating surface that generates heat by heating means is provided on at least one of the two side surfaces formed on the outer periphery of the insertion hole on both sides in the axial direction of the hole. The heating member includes a pair of heating bodies that are supported so as to be rotatable relative to each other at the center of rotation and are opened and closed with respect to each other. Both heating bodies in the closed state rotate around the rotation center line at the center of rotation. The heat insulating material heat fusion material for fluid pipes according to claim 3, wherein a split hole for forming the insertion hole is formed in the split edge portions facing each other in the moving direction. A heating member having a pair of heating bodies that are supported so as to be capable of relative rotation at the center of rotation and can be opened and closed with each other is provided on both heating bodies on both sides in the direction of the center of rotation of the center of rotation. A heat insulating material heat sealing material for fluid pipes, characterized in that a heating surface that generates heat by a heating means is provided on at least one of the two side surfaces. 6. The heating surfaces of the two heating bodies are provided in the whole of a rotation direction centering on a rotation center line in a rotation center portion in a closed state in which the both heating bodies are closed to each other. The heat insulating material heat fusion tool for fluid pipes as described. The heat insulating material for a fluid pipe according to any one of claims 4 to 6, wherein the heating member is supported by a holder, and the holder is provided with an opening / closing operation means for opening and closing both the heating elements. Thermal fusion tool. The heat insulating material formed with a cut extending between both end surfaces along the longitudinal direction of the inner tube is provided with a seam in which cut surfaces facing each other in the circumferential direction of the inner tube are bonded by heat fusion to each other. The fluid pipe with a heat insulating material according to claim 1. In the state in which the outer surface of the inner pipe is covered with a heat insulating material, both the circumferential direction of the inner pipe are opposed to each other in the circumferential direction of the inner pipe in the heat insulating material formed with both incisions extending between both end surfaces along the longitudinal direction of the inner pipe. After the both cut surfaces to be melted are melted, a joint is formed by heat-sealing the two cut surfaces to each other, and then both are formed by the heat insulation material joining method in the fluid pipe with a heat insulation material according to claim 2. A method of joining a heat insulating material in a fluid pipe with a heat insulating material, characterized by providing a joint in which end faces of the heat insulating material are bonded together by heat fusion. In the fluid pipe in which the outer surface of the inner pipe is covered with the heat insulating material, the heat insulating material formed with a cut extending between both end surfaces along the longitudinal direction of the inner pipe has the cut surfaces facing each other in the circumferential direction of the inner pipe. A fluid pipe with a heat insulating material, characterized in that a seam joined by heat fusion is provided.

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