JP2013040469A - Pipeline structure and construction method, sleeve and method for manufacturing sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipeline structure capable of utilizing heat of water flowing inside a pipeline, a construction method of the pipeline structure, a sleeve, and a method for manufacturing the sleeve.SOLUTION: In a pipeline structure, a cylindrical body C having an inner peripheral surface on which water flows is formed inside an existing pipe B, and a passage way D circulating a heat exchange medium is formed nearer the existing pipe side than the inner peripheral surface of the cylindrical body and in the longitudinal direction. A representative sleeve A is the sleeve A consisting of a synthetic resin arranged inside the existing pipe B configuring a pipeline through which water flows and in the longitudinal direction of the existing pipe, and having an outer peripheral surface 1a having an outer shape corresponding to the inner shape of the existing pipe B and an inner peripheral surface 1b on which water flows. Holes 4 becoming circulation passages are formed between the outer peripheral surface 1a and the inner peripheral surface 1b and in the longitudinal direction. The synthetic resin configuring the sleeve A is a thermoplastic resin. The holes 4 are formed in a portion corresponding to a part where water flows. A plurality of holes 4 are formed.

Description

  The present invention relates to a pipe structure capable of utilizing the heat of water flowing inside the pipe, a construction method for constructing the pipe structure, a sleeve for utilizing the heat of water, and the sleeve. And a method for manufacturing the same.

  As pipes through which water flows, pipes for sewers, pipes for industrial water, pipes for agricultural water, and the like are laid. The temperature of the water flowing inside these pipes does not fluctuate greatly throughout the four seasons and maintains a substantially constant value. For example, the temperature of water flowing through a sewer pipe is lower than the outside air temperature in summer and higher than the outside air temperature in winter. For this reason, it can be considered that a new energy source is obtained by performing heat exchange using a temperature difference with water flowing inside the pipe.

  For example, the invention described in Patent Document 1 relates to a sewage heat collection facility and a sewage heat utilization system. In the present invention, the heat collecting equipment is arranged in a jacket shape covering at least the upper part of the outer periphery of the sewer pipe, and this heat collecting equipment comprises a heat collecting pipe formed of a high thermal conductivity material through which the heat source water flows. , And a protective material filled in and around the gap of the heat collection tube. Further, the heat collecting pipe is constituted by a plurality of straight pipes arranged in parallel to the longitudinal direction of the sewer pipe and a vent pipe connecting the straight pipes.

  In the heat collecting equipment configured as described above, the heat collecting pipe is disposed on the outer periphery of the sewer pipe. For this reason, since a heat collection pipe does not contact sewage directly, it has an effect that maintenance is unnecessary and maintenance cost can be reduced. In addition, when installing in an existing sewer pipe, it is sufficient to install a heat collecting pipe on the outer periphery of the sewer pipe opened by excavating the surrounding ground and to fill a predetermined part with a protective material. It also has the effect of being easy.

JP 2008-241226 A

  The invention described in Patent Document 1 has the characteristics as described above. However, since the heat of the sewage is acquired through the sewer pipe, there is a possibility that the heat of the sewage cannot be fully utilized.

  An object of the present invention is to provide a sleeve capable of utilizing the heat of water flowing inside a pipeline, and to provide a method for manufacturing the sleeve, and a method for arranging the sleeve inside the pipeline. .

  In order to solve the above problems, the pipe structure according to the present invention is a pipe structure through which water flows, and a cylindrical flowing water layer having an inner peripheral surface through which water flows is formed inside an existing pipe, A passage for circulating the heat exchange medium in the longitudinal direction is formed on the existing pipe side with respect to the inner peripheral surface of the flowing water layer.

  In the pipe structure, the pipe through which the water flows is preferably a sewer pipe.

  Moreover, the 1st construction method which concerns on this invention is a construction method which constructs one of the said pipe line structures, Comprising: A heat exchange medium is distribute | circulated along a lower side internal peripheral surface in the longitudinal direction of an existing pipe. A flow member in which a passage is formed is arranged, and a cylindrical body having flexibility and constituting the flowing water layer is disposed inside an existing pipe in which the flow member is arranged, and an outer peripheral surface is an inner peripheral surface of the existing pipe. It is characterized in that it is inserted with a reduced diameter so as not to interfere with, and then the inserted cylinder is restored and the flow member is sandwiched between the outer peripheral surface of the cylinder and the inner peripheral surface of the existing pipe To do.

  Further, the second construction method is a construction method for constructing any one of the above pipe structures, and an inner peripheral surface through which water flows and heat formed in the longitudinal direction on the outer peripheral surface side from the inner peripheral surface. And a flexible cylinder that constitutes the flowing water layer, and the outer circumference of the cylinder interferes with the inner circumference of the existing pipe. In this case, the diameter of the cylinder is reduced and inserted, and then the inserted cylinder is restored, and the cylinder is arranged on the inner surface of the existing pipe.

  Further, the first sleeve according to the present invention is a sleeve made of synthetic resin arranged in the longitudinal direction of the existing pipe inside the existing pipe constituting the pipe through which water flows, and an inner peripheral surface through which water flows. And an outer peripheral surface opposite to the inner peripheral surface of the existing pipe, and a passage through which the heat exchange medium flows is integrally formed in the longitudinal direction of the outer peripheral surface of the sleeve main body.

  Further, the second sleeve is a sleeve made of synthetic resin arranged in the longitudinal direction of the existing pipe in the existing pipe constituting the pipe through which water flows, and corresponds to the inner shape of the existing pipe to be arranged. A sleeve main body having an outer peripheral surface having an outer shape and an inner peripheral surface through which water flows, and forming a passage through which a heat exchange medium flows between the outer peripheral surface of the sleeve main body and the inner peripheral surface in the longitudinal direction. It is what.

  In the sleeve, the synthetic resin is preferably a thermoplastic resin.

  In any of the above sleeves, it is preferable that the passage through which the heat exchange medium flows is formed at a portion corresponding to a portion through which water flows in the pipe.

  In any one of the above sleeves, it is preferable that the passage through which the heat exchange medium flows is constituted by one or a plurality of formed holes.

  The first sleeve manufacturing method according to the present invention is a method for manufacturing any one of the above sleeves, and integrally forms a passage through which a heat exchange medium flows when the synthetic resin is extruded. It is characterized by this.

  A second sleeve manufacturing method according to the present invention is a method for manufacturing any one of the above-described sleeves, and has a length set in advance in a formation portion of a passage through which the heat exchange medium flows in the sleeve. A pipe having the above is arranged, and the pipe is integrated by a synthetic resin.

  A third sleeve manufacturing method according to the present invention is a method for manufacturing any one of the above sleeves, and has an outer shape corresponding to the inner shape of the pipe line to be arranged and a preset thickness. And forming a passage through which the heat exchange medium is circulated by cutting the inner surface of the cylinder in the longitudinal direction and then covering at least the open portion of the passage with a synthetic resin sheet. It is characterized by being integrated with the cylindrical body.

  In order to solve the above-described problems, the pipe structure according to the present invention has a cylindrical flowing water layer having an inner peripheral surface through which water flows in an existing pipe, which is more than the inner peripheral surface of the flowing water layer. Since a passage (hereinafter referred to as “flow passage”) through which the heat exchange medium flows in the longitudinal direction on the existing pipe side is formed, heat exchange between water and the heat exchange medium can be performed through the flowing water layer.

  Moreover, the heat which a sewage has can be utilized effectively by making the pipe line into which water flows into a sewer pipe line.

  In the first construction method according to the present invention, a flow member having a flow passage formed along the lower inner peripheral surface in the longitudinal direction of the existing pipe is disposed, and the existing pipe has flexibility. The cylindrical body constituting the flowing water layer is inserted with a reduced diameter so that the outer peripheral surface does not interfere with the inner peripheral surface of the existing pipe, and then the inserted cylindrical body is restored to restore the cylindrical body. The flow member can be sandwiched between the outer peripheral surface and the inner peripheral surface of the existing pipe.

  Further, in the second construction method, the flowing water layer having an inner peripheral surface through which water flows and a flow passage formed in a longitudinal direction on the outer peripheral surface side from the inner peripheral surface and having flexibility is configured. The cylindrical body to be prepared is prepared, the cylindrical body is reduced in diameter and inserted into the existing pipe, and then the inserted cylindrical body can be restored.

  The first sleeve according to the present invention has a sleeve main body having an inner peripheral surface through which water flows and an outer peripheral surface facing the inner peripheral surface of the existing pipe, and a flow passage is formed in the longitudinal direction of the outer peripheral surface of the sleeve main body. Since it is formed integrally, the heat of the water flowing along the inner peripheral surface can be transmitted to the heat exchange medium via the sleeve by arranging the passage in a state of being in direct contact with the inner peripheral surface of the existing pipe. .

  In the second sleeve, the outer shape of the sleeve main body has a flow passage formed between the outer peripheral surface corresponding to the inner shape of the existing pipe and the inner peripheral surface in the longitudinal direction. For this reason, it is possible to exchange heat between the water and the heat exchange medium by arranging the sleeve inside the target pipe line and flowing water and circulating the heat exchange medium inside the flow path. Therefore, it is possible to utilize the heat of water flowing inside the pipe line through the heat exchange medium.

  In particular, by forming the sleeve from a thermoplastic resin, the sleeve can be easily deformed by heating. For this reason, it is possible to convey the folded section in a concave shape so that the circumference becomes small, and it can be efficiently conveyed to the target site and installed on the site.

  Moreover, heat exchange with water can be efficiently performed by making the formation part of the flow path in the sleeve correspond to the part where water flows in the pipe line.

  In addition, by forming the flow passage formed in the sleeve by a plurality of holes, the cross-sectional area of each hole can be reduced, and the dimension between the outer peripheral surface and the inner peripheral surface of the sleeve (the sleeve (Thickness) can be reduced. In particular, when the flow passage is formed, the surface area (heat exchange area) of the entire flow passage can be increased by using a plurality of holes having a small diameter, and efficient heat exchange can be realized.

  The first sleeve manufacturing method according to the present invention is advantageous because the flow passage can be simultaneously formed when the sleeve is extruded.

  Further, in the second method for manufacturing a sleeve according to the present invention, the pipe is integrated between the outer peripheral surface and the inner peripheral surface by arranging and molding the pipe at the flow passage forming portion in the sleeve. And the sleeve can be manufactured.

  Further, in the third sleeve manufacturing method according to the present invention, the inner surface of the cylindrical body formed in advance is cut to form a groove that forms a continuous flow passage in the longitudinal direction, so that the groove has a desired cross-sectional shape. Since it can form, the dimension of the open part of this groove | channel can be taken large. For this reason, when the flow path is formed by covering the synthetic resin sheet at the open portion of the groove, the flow path is opposed to the inner peripheral surface with a large size and via a partition wall having a certain thickness. It becomes. For this reason, high heat exchange efficiency is realizable.

It is a figure explaining the structure of the sleeve which concerns on a present Example. It is a figure explaining the other example of a sleeve. It is a figure explaining the state folded when arrange | positioning a sleeve inside a pipe line. It is a figure explaining the construction method which concerns on a present Example, and is a schematic diagram explaining the state which has arrange | positioned the sleeve between the manholes. It is a front view explaining the connection state of the hole open | released at the edge part of a sleeve, and is a VV arrow line view of FIG. It is a side view explaining the connection state of the hole open | released at the edge part of the sleeve. It is a figure explaining the example of a pipe line structure.

  Hereinafter, preferred embodiments of a pipe structure, a construction method, a sleeve, and a manufacturing method of the sleeve according to the present invention will be described.

  First, an example of a pipeline structure according to the present invention will be briefly described with reference to FIG. In the pipe structure according to the present invention, a flow path is formed between a surface through which water flows and an existing pipe constituting the pipe, and the heat exchange medium is circulated through the flow path to It realizes heat exchange with flowing water.

  In the present invention, pipes through which water flows include various pipes for water flow including pipes for sewers, pipes for waterworks, pipes for agricultural water, and pipes for industrial water. Any of these can be preferably applied. In particular, when a sewer pipe is used as the pipe, it is possible to use the heat held by the wastewater from the home, which is preferable. Moreover, the shape of the existing pipe which comprises a pipe line has shapes, such as a cylindrical shape and a rectangular tube shape, and it can apply even if it is any shape.

  In FIG. 7, a pipe through which water flows has a cylindrical body C that constitutes a flowing water layer having an inner peripheral surface through which water flows inside an existing pipe B that constitutes the pipe. A flow path D is formed in the longitudinal direction on the existing pipe B side from the inner peripheral surface. In this embodiment, the existing pipe B is composed of a reinforced concrete pipe.

  Further, as the cylinder C constituting the flowing water layer, various cylinders including various lining materials used when repairing the inner peripheral surface of the existing pipe and sleeves described later can be used.

  In addition, as the flow path D, a plurality of tubes are arranged in a row and integrated, and a plurality of the integrated tubes are accommodated in a bag and formed into a flat belt shape. Such a flow path D can be configured by extrusion molding of synthetic resin, or by fusing, bonding, or bundling synthetic resin tubes side by side. Further, the flow path D is not limited to the above-described structure, and a plurality of pipes may be arranged along the inner peripheral surface of the existing pipe B.

  However, the pipe structure according to the present invention is not limited to the structure shown in FIG. 7, and the cylindrical body C has a predetermined thickness, and the flow path D is formed in the cylinder C. Sometimes used. That is, even if it is configured using a sleeve A as will be described later, the pipeline structure of the present invention can be realized.

  As a method of constructing the pipe line structure shown in FIG. 7, a member in which a plurality of tubes constituting the flow passage D are accommodated in a bag and formed into a flat belt shape, or a plurality of pipes are provided on the inner peripheral surface of the existing pipe B. It arrange | positions along a longitudinal direction along with it, and is carried out by shrinking | reducing a diameter and then inserting in the inside of the existing pipe | tube B, recovering a shape, and hardening. And it is possible to comprise a pipe line structure by inserting the flow path D between the existing pipe B and the cylinder C whose shape has been recovered.

  As described above, after inserting the flow path D in the existing pipe B, when inserting the cylinder C, the cylinder C is impregnated with a thermosetting resin or a photocurable resin on a flexible impregnated base material. It is preferable to use what is constituted. In the cylindrical body C configured as described above, when pressurized air is supplied to the inside of the cylindrical body C when the shape of the cylindrical body C is restored, the cylindrical body C is formed between the flow passage D and the inner peripheral surface of the existing pipe B. It is possible to fill the gap. And after recovering the shape of the cylinder C, the flow path D is held between the cured cylinder C and the existing pipe B by heating or irradiating the cylinder C and curing it. It becomes possible.

  When constructing the pipe line structure shown in FIG. 7, it is possible to use a structure in which the flow path D is integrally formed on the outer peripheral surface of the cylindrical body C. In this case, it is possible to construct by inserting the cylindrical body C into the existing pipe B to restore the shape and curing it. In particular, the cylindrical body C when performing this construction method may be constituted by a thermoplastic resin, but is preferably constituted by impregnating the aforementioned impregnated base material with a thermosetting resin.

  Next, the sleeve according to the present invention will be described. A first sleeve according to the present invention comprises a sleeve body made of a synthetic resin and having an inner peripheral surface through which water flows and an outer peripheral surface facing the inner peripheral surface of an existing pipe, and the length of the outer peripheral surface of the sleeve main body. A flow passage is integrally formed in the direction.

  The flow passage formed integrally with the outer peripheral surface of the sleeve body may be a state in which the flow passage projects from the outer peripheral surface of the sleeve main body, or the outer surface of the flow passage is in the same plane as the outer peripheral surface of the sleeve main body. There may be. In the sleeve in which the flow passage is formed so as to protrude from the outer peripheral surface of the sleeve main body, the pipe line structure shown in FIG. 7 can be realized.

  The second sleeve according to the present invention is made of a synthetic resin sleeve, and a flow passage is formed between the outer peripheral surface and the inner peripheral surface of the sleeve main body in the longitudinal direction of the sleeve. And this sleeve is arrange | positioned inside the existing pipe which comprises a pipe line, and heat exchange with the water which flows through the inside of a pipe line can be performed now by distribute | circulating a heat exchange medium to a flow path. Therefore, it is possible to utilize the heat of the water flowing inside the pipe line through the heat exchange medium.

  The sleeve according to the present invention can be preferably applied to any of various water flow pipes including pipes for sewers, pipes for waterworks, pipes for agricultural water, and pipes for industrial water. Is possible. Then, heat is exchanged between the water flowing through the pipe and the heat exchange medium flowing through the sleeve through the sleeve by arranging the sleeve in the pipe and flowing the heat exchange medium through the flow passage formed in the sleeve. It is possible.

  The sleeve (hereinafter, “sleeve” includes a “sleeve body”) is not limited in cross-sectional shape, and has an outer peripheral surface having an outer shape corresponding to an inner shape of an existing pipe constituting a pipe line to be arranged. The fact that the outer shape of the outer peripheral surface of the sleeve corresponds to the inner shape of the existing pipe means that the outer shape of the sleeve has a similar shape to the inner shape of the existing pipe. That is, when the inner shape of the existing pipe is circular, the outer shape of the sleeve is circular and the cross-sectional shape is cylindrical. Further, when the inner shape of the existing pipe is a square shape, the outer diameter of the sleeve is also a square shape, and the cross-sectional shape is a square tube shape. Thus, the cross-sectional shape of the sleeve has a shape corresponding to the inner shape of the existing pipe.

  The outer dimension of the sleeve is not particularly limited, and may be a dimension that can be easily and reliably inserted into the existing pipe. Further, the length of the sleeve is not limited, and the sleeve is preferably long in order to increase the degree of freedom of the length of the pipe line to be arranged. It is preferable that the long sleeve is reduced in diameter and wound around, for example, a drum or a reel, or folded in the longitudinal direction and accommodated in a bowl-like case for storage or transportation.

  When reducing the diameter of the sleeve, there are a case where the sleeve is folded so that the cross section of the sleeve is small, and a case where the sleeve is contracted by lowering the temperature of the sleeve. Further, in the case where the sleeve is configured by impregnating the impregnated base material with a thermoplastic resin as will be described later, the diameter of the impregnated base material is previously formed smaller than the inner diameter of the existing pipe in anticipation of expansion when cured. Some of them have a reduced diameter.

  When the sleeve is folded in the cross section to reduce the diameter, there are a method of simply folding the sleeve so that the cross section of the sleeve becomes flat, and a method of folding the sleeve so that a part of the circumference is in contact with the opposite circumference and folds into a Ω shape. Yes, any way of folding is preferable because it can be wound around a drum or a reel.

  The sleeve is formed of a synthetic resin. As a synthetic resin for forming the sleeve, a thermoplastic resin typified by vinyl chloride, polyethylene, or polyethylene terephthalate can be used. When a sleeve is manufactured from a thermoplastic resin, various methods can be employed when forming the flow path because the molded body at room temperature has high rigidity.

  In addition, as a synthetic resin for molding the sleeve, a thermosetting resin made of an unsaturated polyester resin or a photocurable resin containing an unsaturated polyester resin with a photoinitiator (hereinafter referred to as a thermosetting resin and a photocurable resin). Including "thermosetting resin"). When a thermosetting resin is used, it is necessary to use a cylindrical nonwoven fabric that is an impregnated base material or a flexible sleeve in which a reinforcing fiber is impregnated with a thermosetting resin. A method is limited to the method of integrating using the preformed pipe.

  The position of the flow passage formed in the sleeve is not particularly limited. That is, the flow path may be formed uniformly over the entire circumference of the sleeve. In this case, it is possible to realize heat exchange between the heat of water flowing inside the pipe line and the heat of the atmosphere inside the pipe line.

  Further, one or a plurality of flow passages may be formed in a concentrated manner at a predetermined position around the sleeve. In this case, it is possible to exchange heat with the heat of the flowing water by disposing the formed flow passage at a position corresponding to the bottom of the flow in the pipeline. Moreover, it is possible to exchange heat with the heat of the atmosphere inside the pipe line by disposing the flow path above the water surface separated from the water flowing.

  In order to utilize the heat of the water flowing inside the pipe, it is preferable that the flow path is formed at a position corresponding to the bottom surface of the water flowing. In a pipeline where water flows down naturally, the normal water level is set to be lower than about 1/3 of the thickness of the pipeline. For this reason, it is preferable that the flow path formed in the sleeve is also a position smaller than about 1/3 of the thickness of the pipe line corresponding to the portion through which water flows. Accordingly, when the thickness of the sleeve is slightly smaller than the thickness of the pipe, the position of the flow path formed in the sleeve may be smaller than about 1/3 of the thickness of the sleeve. preferable.

  As described above, it is possible to reduce the thickness of the portion of the sleeve in which the flow passage is not formed by forming the flow passage in a limited portion without forming it in the entire circumference of the sleeve. . For this reason, it is possible to keep the inner cross-sectional area of the sleeve as large as possible, and it is possible to reduce the decrease in the flow-down ability of the pipe line due to the arrangement of the sleeve.

  The number of flow passages formed in the sleeve is not limited, and one or a plurality of flow passages can be formed. In order to realize efficient heat exchange, it is preferable that the heat exchange medium flowing in the flow passage is as close to the inner peripheral surface of the sleeve as possible. For this reason, it is preferable to form many small diameter flow paths rather than one or a small number of large diameter flow paths. Therefore, the number of flow passages is preferably set as appropriate according to the thickness of the sleeve and the difference between the outer peripheral surface and the inner peripheral surface (hereinafter referred to as “the thickness of the sleeve” or simply “thickness”).

  The shape of the flow path formed in the sleeve is not limited, and may be formed by meandering in the longitudinal direction or the circumferential direction. In this case, it is possible to form a flow path by using a long pipe meandered in advance. Moreover, you may form a flow path by a hole.

  When the flow path is formed by a hole, the shape of the hole formed in the sleeve is not limited, and it is selected from a shape such as a circle, an ellipse, a polygon, a shape in which an arc and a straight line are combined, and adopted. Is possible. In particular, since water flows on the inner peripheral surface of the sleeve, it is preferable that the hole is as close as possible to the inner peripheral surface and the area of the surface facing the inner peripheral surface is large.

  For this reason, the shape of the hole is preferably a flat circle or polygon rather than a simple circle. For example, it is possible to form one hole made of a flat circle in the sleeve and to circulate the heat exchange medium through this hole. In this case, the area on the inner peripheral surface side of the flat sleeve is increased, and high heat exchange efficiency can be realized.

  However, when forming a hole in the sleeve, it may be preferable to have a simple circular shape, so that the widest possible surface can face the inner peripheral surface in consideration of ease of manufacturing. It is preferable to set the shape.

  There are several methods for manufacturing the sleeve according to the present invention depending on whether the synthetic resin to be employed is a thermoplastic resin or a thermosetting resin.

  When manufacturing a sleeve with a thermoplastic resin, it is possible to employ | adopt the extrusion method generally employ | adopted as a shaping | molding of a thermoplastic resin. In this manufacturing method, it is possible to simultaneously form the cylindrical body of the sleeve and the flow passage or the hole constituting the flow passage, and a long sleeve is manufactured by winding the extruded sleeve around, for example, a drum. Is possible.

  A sleeve made of a thermoplastic resin can be easily deformed by heating, and has a sufficiently high rigidity at room temperature. For this reason, the workability at the time of arrange | positioning to the target pipe line is good. In particular, when it is necessary to repair after deterioration due to aging or other causes after being placed inside an existing pipe, the sleeve is softened by heating by supplying heated steam or hot water to the inside and easily pulled out. It is possible.

  In addition, an outer sleeve corresponding to the outer peripheral surface of the sleeve and an inner sleeve corresponding to the inner peripheral surface are formed in advance by an extrusion molding method, and the inner sleeve is inserted into the outer sleeve and overlapped. After inserting a predetermined number of pipes between them, it is possible to manufacture the sleeve by bonding or fusing the outer sleeve and the inner sleeve together.

  In addition, an outer sleeve is formed in advance by an extrusion molding method, and a meandering pipe or a plurality of straight pipes are inserted, and the inner sleeve is extruded in this state to be integrated into a sleeve. Can be manufactured.

  Further, a material formed by integrally forming the cylindrical portion of the sleeve and the thick portion formed with a square or U-shaped groove opened inside is formed by an extrusion molding method, and the opening portion of the groove is formed. Is closed by a sheet or film made of a thermoplastic resin, and the sleeve can be manufactured by integrating the material and the sheet or film by means such as adhesion or fusion.

  In particular, by adjusting the thickness of the peripheral portion other than the thick portion of the material in advance, the manufactured sleeve can be used as a reinforcing material when repairing the pipe.

  The groove is not limited to being formed by extrusion molding, and a material in which the cylindrical portion and the thick portion of the sleeve are integrally formed is formed in advance by an extrusion molding method. After forming a desired groove including a square shape and a U shape by means such as cutting, the opening of the groove is closed with a sheet or film made of a thermoplastic resin, and the material and the sheet or film are bonded or It is also possible to manufacture the sleeve by integrating by means such as fusion.

  When a sleeve is manufactured from a thermosetting resin, the sleeve is shaped by curing the thermosetting resin impregnated in the impregnated substrate with light or heat. That is, when a sleeve is manufactured from a thermosetting resin, an extrusion molding method in which the flow passages are simultaneously formed and a method in which the flow passages are formed by cutting cannot be employed. Therefore, it is limited to the method of forming the flow path by integrating the pipes.

  In this manufacturing method, an outer cylindrical body having a peripheral length that can be an outer shape corresponding to an inner shape of a pipe line in which a sleeve is to be arranged, and an inner peripheral surface of the sleeve are constituted by a nonwoven fabric or a reinforcing fiber to be an impregnated base material in advance. An inner cylindrical body having a circumferential length to be obtained. After inserting the pipe constituting the flow passage inside the outer cylinder and inserting the inner cylinder, the inner film is placed inside the inner cylinder, and the outer film is placed outside the outer cylinder. A sleeve can be manufactured by impregnating a cylindrical body with a thermosetting resin.

  Further, after impregnating a thermosetting resin with a traction member such as a rope arranged inside the outer cylindrical body, the pipe constituting the flow passage is drawn by the traction member, and further, a thermosetting resin is drawn into the interior beforehand. It is possible to manufacture the sleeve by drawing the inner cylinder impregnated with the resin by the reversing method or the drawing method and stacking them.

  In the sleeve configured as described above, a cylindrical body in which an outer cylindrical body impregnated with a thermosetting resin and an inner cylindrical body are stacked has high flexibility. For this reason, this sleeve is conveyed to the target pipeline and inserted into the pipeline by the reversal method or the retraction method, and then the outer cylinder is expanded by supplying compressed air to the inside of the inner cylinder. The thermosetting resin can be cured by being in close contact with the inner peripheral surface of the pipe line, maintaining this state, irradiating light, or heating with hot water or hot air.

  In the above manufacturing method, the inner cylinder does not necessarily have to be a cylinder, and when the pipe is arranged in a part of the outer cylinder, the inner cylinder has a dimension capable of covering the arranged pipe. It may be a sheet.

  As described above, a sleeve made of a thermoplastic resin or a thermosetting resin can be manufactured.

  Next, the configuration of the sleeve according to the present embodiment will be described with reference to the drawings. The sleeve A shown in FIG. 1 is configured to be disposed inside an existing pipe B (see FIG. 4) configured by connecting cylindrical pipes in series. In particular, the sleeve A is formed of a thermoplastic resin in an elongated shape by an extrusion molding method, and the flow passage is configured as a plurality of holes formed at positions corresponding to the portion where water flows in the existing pipe B. Yes.

  The sleeve A according to the present embodiment is disposed inside a pipeline (for example, a sewer pipeline) through which water naturally flows. As described above, in such a pipeline, the water level is set to about ３ of the thickness of the existing pipe B. Also in this embodiment, a plurality of holes 4 are formed at positions below about １ ／ of the thickness of the sleeve A.

  For this reason, the sleeve A is formed in an arc shape corresponding to the outer peripheral surface 1a having an outer shape (circular shape) corresponding to the inner shape of the existing pipe B and a portion larger than about 2/3 of the thickness of the sleeve A. Arc portion 2, hole forming portion 3 formed corresponding to a portion smaller than about 1/3 of the thickness of sleeve A, and a plurality of holes (4 in this embodiment) formed in hole forming portion 3. 4) and an inner peripheral surface 1b in which the inner peripheral surface of the arc portion 2 and the inner peripheral surface of the hole forming portion 3 are continuously formed.

  The plurality of holes 4 are formed in a circular shape, are formed over the entire length of the sleeve A simultaneously with the extrusion of the sleeve A, and are opened at both end faces of the sleeve A. The smaller the distance between the inner surface of each hole 4 and the inner peripheral surface 1b of the sleeve A (thermoplastic resin thickness), the better the heat exchange efficiency, but the lower the strength and wear resistance. For this reason, the sleeve A is made of a material having a good thermal conductivity, and the hole 4 is formed as close to the inner peripheral surface 1b as possible.

  The plurality of holes 4 are arranged in an arc on the hole forming portion 3, and by arranging in this way, the cross-sectional area formed by the inner peripheral surface 1 b of the sleeve A can be made as large as possible. It becomes. However, the arrangement of the plurality of holes 4 on the arc is not limited, and it is a matter of course that the holes 4 may be arranged on a substantially straight line.

  The sleeve A of the present embodiment is configured to have an outer diameter that is slightly smaller than the inner diameter of the existing pipe B that constitutes the pipe line to be disposed.

  Here, the shape and manufacturing method of the hole 4 formed in the hole forming part 3 will be briefly described with reference to FIG.

  FIG. 2A shows the hole 4 according to the present embodiment, which is formed as a circular hole simultaneously with the extrusion of the sleeve A. FIG. In this case, although the configuration of the mold is complicated, the hole 4 can be formed regardless of the length of the sleeve A because of the integral molding with the sleeve A. It can be easily manufactured.

  FIG. 2B shows the hole 4 formed using the pipe 5. When the sleeve A is manufactured from a thermoplastic resin, a predetermined number of pipes 5 are arranged at positions corresponding to the hole forming portion 3, and the thermoplastic resin is extruded to form the pipe 5, the arc portion 2, and the hole forming portion 3. It is possible to manufacture by integrally molding.

  When the sleeve A shown in FIG. 2 (b) is manufactured from a thermosetting resin, an outer cylinder having a peripheral length smaller than the peripheral length of the inner surface of the existing pipe B is constituted by a nonwoven fabric or a reinforcing fiber serving as an impregnated base material. In addition, an inner cylindrical body having a dimension larger than the circumferential length when the plurality of pipes 5 are arranged is configured. After inserting a predetermined number of pipes inside the outer cylinder and inserting and stacking the inner cylinder, placing the inner film inside the inner cylinder and the outer film outside the outer cylinder, both cylinders It is possible to manufacture the sleeve A by impregnating with thermosetting resin.

  Alternatively, after impregnating a thermosetting resin with a traction member such as a rope arranged inside the outer cylindrical body, the pipe constituting the flow path is drawn by the traction member, and the thermosetting resin is further preliminarily inserted therein. The sleeve A can be manufactured by pulling and overlapping the inner cylindrical body impregnated with the resin by the reversal method or the retraction method.

  As described above, when forming the hole 4 by arranging the pipe 5 in the hole forming portion 3 at the time of forming the sleeve A, since the pipe 5 has a finite length, the long sleeve A exceeding the length of the pipe 5 is formed. It is necessary to connect a plurality of pipes 5 in a straight line by sockets when manufacturing the above. For this reason, there exists a possibility that manufacture of the sleeve A may become complicated.

  FIG. 2C shows a hole 4 formed by forming a U-shaped groove in the hole forming portion 3 and closing the groove with the synthetic resin film 6. The U-shaped groove can be formed simultaneously with the extrusion of the sleeve A. It is also possible to form the hole forming portion 3 simply as a thick portion at the time of forming the sleeve A and cut this portion to form a groove. In such a hole 4, the opening area on the inner peripheral surface 1 b side is increased, and it is possible to improve the heat exchange efficiency with water flowing on the inner peripheral surface 1 b.

  In the sleeve A manufactured by the thermoplastic resin, the outer peripheral surface 1a is circular, so the volume is large, and the efficiency during storage and transport is poor. Therefore, as shown in FIG. 3, the section is folded into a concave shape. Formed. That is, the sleeve A is recessed so that the top part approaches the hole forming part 3 side while the arc part 2 is heated and flexible, and the sleeve A is reduced in diameter including the hole forming part 3 and folded into a concave shape. It is wound on a drum (not shown). In this way, by being folded in a concave shape and reducing the diameter, efficiency during storage and transportation is improved, and it is possible to easily perform work when inserting into the existing pipe B. .

  Next, a construction method for arranging the sleeve A on the existing pipe B constituting the pipe line will be described in detail with reference to FIGS.

  In this embodiment, the pipe line in which the sleeve A is to be disposed is configured as a pipe for sewerage, and is formed between adjacent manholes 11 and 12 as shown in FIG. The pipe for sewage is constituted by connecting a plurality of reinforced concrete pipes that are the existing pipes B between the adjacent manholes 11 and 12 in series. The manholes 11 and 12 are configured by connecting straight wall pipes and slant wall pipes in the vertical direction, and a bottom plate 13 having grooves at the same level as the existing pipe B is provided at the bottom.

  As described above, in the sleeve A, the arc portion 2 is folded into a concave shape (Ω shape) and reduced in diameter and hardened. The one manhole 11 is conveyed. And the drum conveyed to the manhole 11 is installed on the ground. Further, the bottom plate 13 of each of the manholes 11 and 12 is formed with a depression 13a by a ridge at a portion facing the existing pipe B.

  Thereafter, while the sleeve A is heated and softened, the drum A is rotated in the rewinding direction to feed out the softened sleeve A, and the sleeve A is inserted into the existing pipe B from the manhole 11 by this feeding. At this time, the sleeve A is set and inserted so that the hole 4 is positioned on the bottom side of the existing pipe B. When the sleeve A is inserted into the existing pipe B, since the sleeve A is in a state where the arc portion 2 is folded, the sleeve A is caused to interfere with the existing pipe B as shown in FIG. And can be inserted smoothly.

  After the sleeve A is inserted into the existing pipe B between the manholes 11 and 12, the sleeve A is cut at a predetermined position (for example, a substantially central portion in the manholes 11 and 12). In this state, the plurality of holes 4 formed in the hole forming portion 3 of the sleeve A are open to the end surface of the sleeve A.

  Next, the sleeve A holding the recessed state is heated with warm water, steam or heated air to further exhibit flexibility. That is, warm water, steam, or heated air is supplied to the inside of the sleeve A, or inside the sleeve A and inside the existing pipe B (on the outer peripheral surface 1a side of the sleeve A) to heat the sleeve A, particularly the arc portion 2. Show flexibility. When the sleeve A is sufficiently flexible, the arc portion 2 is restored from the concave shape to the arc shape by the worker or the steam supplied to the inside of the sleeve A, and the outer peripheral surface 1a is brought into close contact with the inner surface of the existing pipe B Let

  After confirming that the shape of the sleeve A has been restored over its entire length and the outer peripheral surface 1a is in close contact with the inner surface of the existing pipe B, the supply of warm water, steam or heated air is stopped, To cool. The sleeve A is forcibly cooled and hardened, and maintains a tightly adhered shape. Then, after the sleeve A is sufficiently cured, the portions of the sleeve A protruding into the manholes 11 and 12 are cut so as to be flush with the wall surfaces of the manholes 11 and 12.

  Thereafter, as shown in FIGS. 5 and 6, the two holes 4 opened on the end surface of the sleeve A are selected, and the supply pipe 15 serving as a heat exchange medium supply member is connected to the one hole 4, and A receiving pipe 16 serving as a heat exchange medium receiving member is connected to the other hole 4. Further, the remaining openings 4 communicate with each other by connecting a U-shaped tube 17.

  When connecting the supply pipe 15 and the reception pipe 16 to the hole 4 selected from the holes 4 of the sleeve A, whether the supply pipe 15 and the reception pipe 16 are provided in the same manhole 11 or in the manholes 11 and 12, respectively. Is not limited, and is set according to conditions such as the usage of the heat pump 18 installed on the ground and the length of the existing pipe B.

  For example, as shown in FIG. 4, when a supply pipe 15 and a receiving pipe 16 are provided in one manhole 11 and connected to a heat pump 18, both end sides are formed from four holes 4 formed in a sleeve A opened in the manhole 11. The two holes 4 are selected and the supply pipe 15 and the receiving pipe 16 are connected to each other, and the U-shaped pipe 17 is connected to and communicated with the remaining holes 4 so as to be adjacent to the holes 4 opened in the manhole 12. It is possible to configure the holes 4 as a series of flow passages through which a heat exchange medium in which the four holes 4 are continuous is circulated by connecting the U-shaped tubes 17 to each other.

  Further, when the supply pipe 15 is provided in the manhole 11 and the receiving pipe 16 is provided in the manhole 12, one of the four holes 4 opened in the manhole 11 (for example, the left end in FIG. 5). The hole 4) is selected to connect the supply pipe 15, and the remaining three holes 4 to two holes 4 (for example, the second and third holes 4 from the left in FIG. 5) are selected to The U-tube 17 is connected to the hole 4 connected to the supply tube 15 in the manhole 11 and the hole 4 adjacent to the hole 4 among the holes 4 opened to the manhole 12. Are connected to each other, and the receiving pipe 16 is connected to the adjacent holes 4 to form a series of flow passages through which the heat exchange medium in which the three holes 4 are continuous is circulated. In this case, one of the four holes 4 formed in the sleeve A is not used.

  When the supply pipe 15, the receiving pipe 16, and the U-shaped pipe 17 are connected to the holes 4 opened in the manholes 11 and 12 as described above, the connecting portions of these pipes 15 to 17 and the holes 4 are the bottom plate 13. It exists in the hollow 13a formed. Further, the level of one inner peripheral surface corresponding to the hole forming portion 3 of the sleeve A is higher than the flowing water level of the initial bottom plate 13. For this reason, the recess 13a is filled with the mortar 20 and the running water level of the bottom board 13 is raised.

  The supply pipe 15 and the receiving pipe 16 are connected to a heat pump 18 installed on the ground. The heat pump 18 is connected to a heating / cooling appliance (not shown) and the like so that the heat of water flowing through the pipe can be utilized.

  When the sleeve A is made of a thermosetting resin, the sleeve A is conveyed to the site in a flexible state, and is inserted into a target pipe line by a reversing method or a drawing method. Thereafter, the hole 4 is filled with, for example, water as an incompressible fluid, and compressed air is supplied to the inside of the sleeve A so as to be expanded, whereby the hole 4 is brought into close contact with the inner surface of the existing pipe B. Furthermore, by irradiating light from the inside of the sleeve A or heating it to cure the thermosetting resin, it is possible to arrange the sleeve A inside the existing pipe B constituting the pipe line. Thus, the hole 4 is not crushed by supplying compressed air to the inside of the sleeve A in a state where the hole 4 formed in the sleeve A is filled with water.

  When the sleeve A made of a thermosetting resin is disposed in the pipe line, the sleeve A is not softened even if it is heated when the sleeve A is repaired due to deterioration over time or for some reason. For this reason, the problem that the operation | work which removes the hardened sleeve A from a pipe line is not easy may arise. However, since the sleeve A made of a thermosetting resin has a high strength after being cured, it is possible to form a sufficiently self-supporting pipeline.

  The pipe structure according to the present invention can utilize the heat of water flowing through the pipe, and is advantageous for use as a heat source for cooling and heating, a heat source for melting snow, and the like. Moreover, the construction method is advantageous when used to construct the pipe structure. Furthermore, the sleeve according to the present invention is advantageous when used to transfer the heat of water flowing through the pipe line to the heat exchange medium.

A sleeve B existing pipe C cylindrical body D flow passage 1a outer peripheral surface 1b inner peripheral surface 2 arc portion 3 hole forming portion 4 hole 5 pipe 6 synthetic resin film 11, 12 manhole 13 bottom plate 13a recess 15 supply pipe 16 supply pipe 17 U-shape Tube 18 Heat pump 20 Mortar

Claims (12)

A structure of a pipeline through which water flows,
A cylindrical flowing water layer having an inner peripheral surface through which water flows is formed inside the existing pipe,
A pipe structure in which a passage for circulating a heat exchange medium in the longitudinal direction is formed on the existing pipe side with respect to the inner peripheral surface of the flowing water layer.   The pipe structure according to claim 1, wherein the pipe through which the water flows is a sewer pipe. A construction method for constructing the pipeline structure according to claim 1,
In the longitudinal direction of the existing pipe, a flow member in which a passage for flowing the heat exchange medium along the lower inner peripheral surface is formed,
Inside the existing pipe in which the flow member is arranged, the cylindrical body having flexibility and constituting the flowing water layer is reduced in diameter so that the outer peripheral surface does not interfere with the inner peripheral surface of the existing pipe. Insert
Then, the inserted cylindrical body is restored, and the distribution member is sandwiched between the outer peripheral surface of the cylindrical body and the inner peripheral surface of the existing pipe. A construction method for constructing the pipeline structure according to claim 1,
A cylindrical body that has an inner peripheral surface through which water flows and a passage through which a heat exchange medium formed in the longitudinal direction on the outer peripheral surface side of the inner peripheral surface circulates and that has flexibility. Prepare
The cylindrical body is inserted into the existing pipe with a reduced diameter so that the outer peripheral surface does not interfere with the inner peripheral face of the existing pipe,
Thereafter, the inserted cylindrical body is restored, and the cylindrical body is disposed on the inner surface of the existing pipe. A sleeve made of a synthetic resin disposed in the longitudinal direction of the existing pipe inside the existing pipe constituting the pipe through which water flows,
A sleeve body having an inner peripheral surface through which water flows and an outer peripheral surface facing the inner peripheral surface of the existing pipe;
A sleeve characterized in that a passage through which a heat exchange medium flows is integrally formed in the longitudinal direction of the outer peripheral surface of the sleeve body. A sleeve made of a synthetic resin disposed in the longitudinal direction of the existing pipe inside the existing pipe constituting the pipe through which water flows,
A sleeve body having an outer peripheral surface having an outer shape corresponding to an inner shape of an existing pipe to be disposed and an inner peripheral surface through which water flows;
A sleeve in which a passage through which a heat exchange medium flows is formed between an outer peripheral surface and an inner peripheral surface of the sleeve main body in a longitudinal direction.   The sleeve according to claim 5 or 6, wherein the synthetic resin is a thermoplastic resin.   The sleeve according to any one of claims 5 to 7, wherein the passage through which the heat exchange medium is circulated is formed at a portion corresponding to a portion of the pipe through which water flows.   The sleeve according to any one of claims 5 to 8, wherein the passage through which the heat exchange medium flows is configured by one or a plurality of holes formed therein.   A method for manufacturing a sleeve according to any one of claims 5 to 9, wherein a passage through which a heat exchange medium flows is integrally formed when the synthetic resin is extruded. Production method.   A method for manufacturing a sleeve according to any one of claims 5 to 9, wherein a pipe having a preset length is disposed in a formation portion of a passage through which a heat exchange medium flows in the sleeve. A method for manufacturing a sleeve, wherein the pipe is integrated with a synthetic resin.   A method for manufacturing a sleeve according to any one of claims 6 to 9, wherein an elongated cylindrical body having an outer shape corresponding to an inner shape of a pipe line to be disposed and a preset thickness is provided. And forming a passage through which the heat exchange medium is circulated by cutting the inner surface of the cylinder in the longitudinal direction, and at least an open portion of the passage is covered with a synthetic resin sheet and integrated with the cylinder. A method for manufacturing a sleeve, characterized in that

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