JP5914084B2 - Heat collection system for sewage heat and its construction method - Google Patents

Description

  The present invention relates to a heat collection system such as sewage heat and a construction method thereof.

  Since the sewer is normally buried in the ground, the sewage flowing down the sewer is hardly affected by the outside air, and is maintained at a substantially constant temperature throughout the year. For this reason, it has been proposed to use sewage as a heat source for various purposes such as melting snow in snowfall areas.

  For example, as shown in Patent Documents 1 and 2, a heat collection pipe is disposed along the outer peripheral surface of the sewer pipe, the heat collection pipe is connected to a heat exchanger of the heat pump unit, and the heat exchange medium is a heat collection pipe and It has been proposed to recover and utilize sewage heat in a heat exchange medium by circulating it between heat exchangers.

  Moreover, as shown in Patent Document 3, a tubular hole serving as a flow path for a heat exchange medium or a groove having an inner surface of a sewer pipe as a lid is formed in a spiral shape in the covering material, and the covering material is attached to the sewer pipe. Thus, it has been proposed to form a flow path of a heat exchange medium continuous in a spiral shape.

  Furthermore, as shown in Patent Document 4, a valve box with a distribution header embedded in the upstream and downstream surface portions of the heat collection pipe embedded in the foundation of the sewer pipe is embedded, and the upstream valve box and the downstream side The distribution headers of the valve box are connected via a transfer pipe buried in the ground, and the heat exchange medium is supplied from the upstream valve box to each heat collection pipe via the supply pipe and the distribution header of the downstream valve box. In doing so, it has also been proposed that the heat exchange medium of the transfer pipe is exchanged with the surrounding soil and used as an auxiliary heat collection pipe.

JP 2008-241226 A JP 2002-13105 A JP 2002-348842 A Japanese Patent Laid-Open No. 2002-235958

  However, since the heat collecting pipes described in Patent Documents 1, 2, and 4 described above are arranged on the outer peripheral side of the sewer pipe, in order to newly attach the existing sewer pipe, the road or the like is cut open. There is a problem that the sewer pipe needs to be exposed, the construction becomes large, the cost is increased, and the construction period is prolonged. Moreover, it cannot be avoided that a part of the collected sewage heat is diffused into the ground, and the efficiency is lowered.

  On the other hand, the tubular hole serving as the flow path of the heat exchange medium in Patent Document 3 or the groove having the inner surface of the sewer pipe serving as a lid is continuous in a spiral shape, so that the flow path is long, resulting in friction within the tubular hole. The loss head (pressure loss) becomes large and the circulation of the heat exchange medium becomes difficult. In order to circulate the heat exchange medium, there are measures such as increasing the diameter of the tubular hole, but this leads to a decrease in pressure resistance performance and strength of the tubular hole and the covering material.

  The present invention has been made in view of such problems, and collects heat held by sewage flowing down an existing pipe buried in the ground without cutting a road or the like while suppressing pressure loss. The present invention provides a heat collection system such as sewage heat and its construction method.

  The heat collection system for sewage heat and the like of the present invention produces a new pipe inside an existing pipe buried in the ground, while disposing a main pipe and a heat collection pipe for a heat exchange medium inside the new pipe. The heat collecting pipe is connected to the main pipe every set span, the heat exchange medium is branched from the main pipe to each heat collecting pipe, and the new pipe is heat-exchanged with the fluid flowing down and returned to the main pipe. .

  According to the present invention, a new pipe is manufactured inside an existing pipe buried in the ground, and a main pipe and a heat collection pipe for a heat exchange medium are respectively arranged inside the new pipe, and a heat collection pipe is provided for the main pipe. Connect for each set span. Then, the heat exchange medium is supplied to the main pipe and branched from the main pipe to the heat collecting pipe of each span, and heat is exchanged with a fluid such as sewage flowing down the new pipe and returned to the main pipe. Thereby, the heat possessed by the fluid flowing down the newly installed pipe in the heat exchange medium flowing through the heat collecting pipe can be collected and circulated through the heat collecting pipe.

  As a result, the heat possessed by the fluid flowing down the existing pipe buried in the ground without cutting the road or the like can be collected while suppressing the pressure loss.

  The heat collection system for sewage heat and the like of the present invention forms a new pipe inside an existing pipe buried in the ground, and disposes a main pipe and a heat collection pipe for a heat exchange medium outside the new pipe. The heat collecting pipe is connected to the main pipe every set span, the heat exchange medium is branched from the main pipe to each heat collecting pipe, and the new pipe is heat-exchanged with the fluid flowing down and returned to the main pipe. .

  According to the present invention, a new pipe is formed inside an existing pipe buried in the ground, and a main pipe and a heat collection pipe for a heat exchange medium are respectively disposed outside the new pipe, and a heat collection pipe is provided for the main pipe. Connect for each set span. Then, the heat exchange medium is supplied to the main pipe and branched from the main pipe to the heat collecting pipe of each span, and heat is exchanged with a fluid such as sewage flowing down the new pipe and returned to the main pipe. Thereby, the heat possessed by the fluid flowing down the new pipe in the heat exchange medium flowing through the heat collection pipe can be collected and circulated through the heat collection pipe and the new pipe.

  As a result, the heat possessed by the fluid flowing down the existing pipe buried in the ground without cutting the road or the like can be collected while suppressing the pressure loss.

  In the present invention, it is preferable that the new pipe is formed by spirally winding a belt-like member having joints formed on both side edges and joining the joints of adjacent belt-like members together. Thereby, even if it is in the condition where the fluid is flowing down in the existing pipe, a new pipe can be manufactured easily.

  In the present invention, the main pipe consists of one forward main pipe and two main pipes, or one forward main pipe and one main pipe, and the heat collecting pipes of each span are connected in parallel to the forward main pipe and the main main pipe. It is preferable. Thereby, the pressure loss accompanying the piping resistance of a heat collection pipe | tube can be suppressed, and a heat collection pipe | tube can be arrange | positioned irrespective of the length of a construction area. It is also possible to collect heat over the construction section.

  In the present invention, it is preferable that the heat collecting pipe of each span is connected to the main pipe via a joint portion. Thereby, the connection operation | work of the heat collecting pipe of each span with respect to a main pipe can be standardized and performed easily.

  In the present invention, the main pipe is preferably supported by a support member fixed to the new pipe. As a result, the main pipe can be reliably fixed to the new pipe via the support member.

  In the present invention, each of the heat collecting tubes is preferably branched from the main tube and spirally wound along the inner peripheral surface of the new tube. Thereby, the heat collecting pipe can contact the fluid flowing down the newly installed pipe many times, and can efficiently collect the fluid heat.

  In this invention, it is preferable that a groove part is formed in the surface side of the said strip | belt-shaped member, and a heat collection pipe | tube is arrange | positioned by the spiral groove part formed in the internal peripheral surface of the new pipe manufactured by the strip | belt-shaped member. As a result, the heat collecting pipe can be held in the spiral groove formed in the new pipe and brought into direct contact with the fluid such as sewage flowing down the new pipe, and it becomes a resistance to the fluid and deposits on the mixed substances in the fluid. And can be prevented from being caught, and the dissipation of the heat recovered in the heat exchange medium flowing through the heat collecting tube can be suppressed.

  In the present invention, the main pipe is preferably disposed in the upper half of the new pipe. Thereby, the main pipe does not become a resistance to a fluid such as sewage that normally flows down the new pipe, and a smooth flow of the fluid can be ensured.

  In the present invention, the main pipe is preferably supported by a support member fixed to an existing pipe. Thereby, a main pipe can be reliably supported via a support member with respect to an existing pipe.

  In the present invention, each of the heat collecting tubes is preferably branched from the main tube and spirally wound along the outer peripheral surface of the new tube. Thereby, the heat collecting pipe can contact the fluid flowing down the new pipe many times through the new pipe, and can efficiently collect the fluid heat.

  In the present invention, a plurality of reinforcing ribs are erected on the back surface side of the belt-shaped member, and a heat collecting tube is disposed between the adjacent spiral reinforcing ribs on the outer peripheral surface of a new tube manufactured by the belt-shaped member. It is preferable. Thereby, it does not become an obstacle with respect to fluids, such as the sewage which flows down a new installation pipe | tube, and can also suppress the dissipation of the heat | fever collect | recovered by the heat exchange medium which flows through a heat collecting pipe.

  The construction method of the heat collection system such as sewage heat according to the present invention is a method in which a band-shaped member in which a joint portion is formed on both side edge portions and a groove portion is formed on the surface side is spirally wound in an existing pipe. After joining the joints of the belt-shaped members to each other to produce a new pipe, a heat collecting pipe is arranged in a spiral groove formed on the inner peripheral surface of the new pipe, and a main pipe is arranged inside the new pipe The heat collecting pipe is connected to the main pipe every set span.

  According to the present invention, a new pipe is formed in an existing pipe, and a main pipe and a heat collecting pipe are respectively disposed in the new pipe, and the heat collecting pipe is connected to the main pipe for each set span, thereby allowing the sewage to flow down the new pipe. The heat of the fluid such as can be collected.

  As a result, the heat possessed by the fluid flowing down the existing pipe buried in the ground without cutting the road or the like can be collected while suppressing the pressure loss.

  In the present invention, it is preferable to fill the space between the existing pipe and the new pipe with a backfill material before or after the heat collecting pipe is arranged in the spiral groove of the new pipe. Thereby, a new installation pipe can be fixed to an existing installation.

  In the present invention, it is preferable that the heat-collecting tube is preliminarily provided with a corrugation corresponding to the spiral groove portion of the new tube. As a result, the heat collection tube can be easily fitted into the spiral groove portion of the new tube, and the heat collection tube can be prevented from coming out of the spiral groove portion in a straight line.

  In the present invention, it is preferable that the heat collection pipe is drawn out from the spiral groove of the new pipe and connected to the joint provided at the branch point of the main pipe. Thereby, the arrangement | positioning operation | work of the heat collection pipe | tube to the spiral groove part of a new installation pipe | tube and the connection work of the heat collection pipe | tube with respect to the joint part of a main pipe can be performed in parallel, and workability | operativity can be improved.

  In the present invention, the main pipe is preferably disposed in the upper half of the new pipe. Thereby, the main pipe does not become a resistance to a fluid such as sewage that normally flows down the new pipe, and a smooth flow of the fluid can be ensured.

  The construction method of the heat collection system such as sewage heat according to the present invention is a strip-like structure in which a joint portion is formed at both side edges in the existing pipe, a groove is formed on the surface side, and the heat collection pipe is disposed in the groove. After winding the member in a spiral, joining the joints of adjacent band members together to make a new pipe, the main pipe is arranged inside the new pipe, and the heat collection pipe is set for each set span with respect to the main pipe Is pulled out from the spiral groove and connected.

  According to the present invention, a new pipe is formed in an existing pipe, a main pipe is arranged in the new pipe, and a spiral heat collecting pipe arranged simultaneously with the production of the new pipe is connected to the main pipe every set span. By doing so, it is possible to collect the heat of fluid such as sewage flowing down the new pipe.

  As a result, the heat possessed by the fluid flowing down the existing pipe buried in the ground without cutting the road or the like can be collected while suppressing the pressure loss.

  In the construction method of the heat collection system such as sewage heat of the present invention, after the main pipe is arranged inside the existing pipe, joints are formed on both side edges in the existing pipe, and a plurality of reinforcements are provided on the back side. A band-shaped member in which a rib is erected and a heat collection tube is arranged between the adjacent reinforcing ribs is spirally wound, and the joints of adjacent band-shaped members are joined together to intermittently install a new pipe every set span. The heat collecting pipe of the set span is connected to the main pipe after the pipe of the set span is manufactured.

  According to the present invention, after the main pipe is disposed in the existing pipe, the new pipe is intermittently formed for each set span, and the set span provided on the outer peripheral surface of the new pipe is collected simultaneously with the production of the new pipe. By connecting the heat pipe to the main pipe, the heat of fluid such as sewage flowing down the new pipe can be collected.

  As a result, the heat possessed by the fluid flowing down the existing pipe buried in the ground without cutting the road or the like can be collected while suppressing the pressure loss.

  ADVANTAGE OF THE INVENTION According to this invention, the heat which the sewage etc. which flow down an existing pipe | tube without excavating a road etc. can be heat-suppressed, suppressing a pressure loss.

It is sectional drawing of an underground pipe line which shows one Embodiment of heat collection systems, such as sewage heat, of this invention. It is the schematic which shows typically heat collection systems, such as the sewage heat of FIG. It is the perspective view and front view which expand and show 1 span of heat collection systems, such as the sewage heat of FIG. It is a top view which abbreviate | omits and shows some heat collection systems, such as the sewage heat of FIG. It is sectional drawing which expands and shows the A section of FIG. It is sectional drawing explaining the strip | belt-shaped member used for pipe manufacture of the new installation pipe | tube in heat collection systems, such as sewage heat of FIG. 1, and its joining process. It is sectional drawing explaining the joining process of the strip | belt-shaped member which arrange | positioned the heat collection pipe | tube. It is the perspective view and front view which show other embodiment of heat collection systems, such as sewage heat, of this invention corresponding to FIG. It is sectional drawing explaining the strip | belt-shaped member which arrange | positioned the heat collection pipe | tube used for the pipe making of the new installation pipe | tube in heat collection systems, such as the sewage heat of FIG. 8, and its joining process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 show an embodiment of a heat collection system 1 such as sewage heat of the present invention.

  The heat collection system 1 includes a new pipe S newly formed on an existing pipe K such as a sewer pipe, a main pipe 2 disposed on the inner pipe top of the new pipe S, and a new pipe S. It is comprised from the heat collection pipe | tube 3 arrange | positioned along the inner peripheral surface, and the joint part 4 which connects the main pipe 2 and the heat collection pipe | tube 3. As shown in FIG.

  Here, the new pipe S is piped using a conventionally known pipe making machine (not shown) (see, for example, JP-A-9-32968). Specifically, a transport drum in which a belt-like member 100 (see FIG. 6) having joints formed on both side edges is wound in a hollow cylindrical shape is installed on the ground, and a pipe making machine is disposed in the existing pipe K. Then, the belt-like member 100 drawn out spirally from the transport drum is introduced into the pipe making machine in the existing pipe K, and the joints of the adjacent belt-like members 100 are rotated by rotating the pipe making machine around the axis of the existing pipe K. Are joined to each other to form a new pipe S, and a new strip S 100 is supplied to the new pipe S that has been piped without rotating, so that the new pipe S is additionally formed in the axial direction of the existing pipe K. is there.

  The belt-like member 100 is formed by extruding a flexible synthetic resin, for example, hard vinyl chloride, and, as shown in FIG. The side substrate 102 is connected in parallel to the front surface side substrate 101, the bonding recess 104 as a connection rib is connected to the back surface side substrate 102, and the inclined rib 105 is connected to the bonding recess 104. Then, on the back surface of the edge portion on the side facing the connecting rib 103 of the surface side substrate 101 which is one side edge portion of the belt-shaped member 100, a bonding convex portion 106 which can be fitted into the bonding concave portion 104 is erected. ing. Further, the bonding recess 104 is formed in a stepped portion 107 stepped down to the back side by the thickness of the surface side substrate 101 so that the side edge portion of the surface side substrate 101 provided with the bonding projection 106 is disposed. ing. Further, the inclined rib 105 connected to the bonding recess 104 is inclined so as to be positioned on the protruding side of the bonding recess 104 as it is separated from the front surface side substrate 101, and the tip thereof forms the other side edge of the band-shaped member 100. doing. In addition, partition ribs 108 having a reverse T-shaped cross section are provided on the front surface of the back substrate 102 so that the front ends thereof are parallel to the front substrate 101 and are connected to the back substrate 102 and both ends thereof. Two grooves 100 a and 100 a are formed in a space defined by the connecting rib 103 and the joint recess 104.

  Such a belt-like member 100 is supplied to the pipe making machine so that the back surface side of the front surface side substrate 101, that is, the back surface side substrate 102 becomes the outer peripheral side, and in the joining process, FIG. 6 (a), (b) As shown in FIG. 2, of the two belt-like members 100 and 100 adjacent to each other in a spiral shape, the joining convex portion 106 of one belt-like member 100 is inside the joining concave portion 104 of the other belt-like member 100 (the preceding belt-like member 100 By fitting from the inner peripheral side), these adjacent strip members 100, 100 can be joined to each other to produce a new pipe S (see FIG. 3) having a predetermined pipe diameter.

  At this time, the surface-side substrate 101 provided with the bonding convex portion 106 of the subsequent band-shaped member 100 is disposed in the stepped portion 107 of the preceding band-shaped member 100 and the inclined rib 105 of the preceding band-shaped member 100 is subsequent. The member 100 is engaged with a corner portion between the connecting rib 103 on the side where the joint convex portion 106 is provided and the back surface side substrate 102.

  The main pipe 2 is a resin pipe made of a resin excellent in corrosion resistance, for example, a hard vinyl chloride resin, and a set interval is provided at the top of the pipe in the construction section of the new pipe S, for example, between adjacent manholes M1 and M2. And it is being fixed to the holding part 51 (refer FIG.3 (b)) of the supporting member 5 fixed via the anchor etc. The main pipe 2 is composed of one forward main pipe 21 disposed over the construction section and two main pipes 22 and 221, and one end of the forward main pipe 21 and the main pipe 22 on the side of the manhole M1 is The heat pump unit H installed near one manhole M1 is connected via circulation pipes h1 and h2. Further, the other manhole M2 side end portions of the two main pipes 22 and 221 are connected via a U-shaped pipe joint 6 (see FIG. 2), and the other manhole M2 side end portion of the forward main tube 21 and the folded portion are folded back. One end of the main pipe 221 on the side of the manhole M1 is closed via a cap 7 (see FIG. 2).

  The heat collection tube 3 is a resin tube made of a resin that is excellent in corrosion resistance and flexibility, and is smooth and has low fluid resistance, for example, cross-linked polyethylene, and is the two groove portions 100a of the belt-shaped member 100 described above, that is, the belt-shaped member. 100 is fitted over two spans p set in the spirally continuous two groove portions Sa in the new pipe S manufactured by 100. The two heat collecting pipes 3 in each span p have one manhole M1 side inlet end connected to the forward main pipe 21 of the main pipe 2 via the joint portion 4, and the other manhole M2 side outlet end is folded back. The main pipe 221 is connected via the joint 4.

  Here, the inlet end of the heat collecting pipe 3 in each span p is connected to the forward main pipe 21 so as to be gradually separated from the heat pump unit H, whereas the outlet end of the heat collecting pipe 3 in each span p is The folded main pipe 221 is connected so as to gradually move away from the heat pump unit H, that is, so as to gradually approach the heat pump unit H with respect to the restored main pipe 22 connected to the folded main pipe 221. Yes. Thereby, it can suppress that the piping resistance of the heat collecting pipe 3 in each span p increases as it leaves | separates from the heat pump unit H.

  The joint part 4 that connects the main pipe 2 and the heat collecting pipe 3 is a cheese 41 connected to the main pipe 2 (for example, refer to a different diameter cheese related to the manufacture and sale of Sekisui Chemical Co., Ltd.) and a conversion connected to the cheese 41. Adapter 42 (for example, refer to the Eslon HIVP conversion adapter related to the manufacture and sale of Sekisui Chemical Co., Ltd.) and pipe joint 43 connected to the conversion adapter 42 (for example, refer to the pex header joint related to the manufacture and sale of Sekisui Chemical Co., Ltd.) The end of the heat collecting tube 3 is connected to the pipe joint 43.

  In this embodiment, the main pipe 2 has an inner diameter of about 51 mm, the heat collection pipe 3 has an inner diameter of about 13 mm, and one end p of the heat collection pipe 3 is set to 2500 to 4000 mm via the joint portion 4. And connected to the folded main pipe 221. In this case, the total extension distance of the heat collecting pipe 3 in one span p is about 101 to 162 m when the inner diameter of the newly installed pipe S is 1000 mm and the pitch of the belt-like member 100 is 79 mm.

  Next, the construction procedure of the heat collection system 1 configured as described above will be described.

  First, as described above, the transport drum in which the belt-like member 100 shown in FIG. 6 is wound in a hollow cylindrical shape is installed on the ground on the one manhole M1 side, and the pipe making machine is disposed in the existing pipe K. Then, the belt-like member 100 drawn out spirally from the transport drum is introduced into the pipe making machine in the existing pipe K, and the pipe making machine is rotated around the axis of the existing pipe K to join the joint 104 of the adjacent belt-like member 100. , 106 are joined together to form a new pipe S, and a new band S 100 is supplied to the new pipe S that has been produced without rotation, and the new pipe S is additionally formed in the axial direction of the existing pipe K. To do. Then, if one of the manholes M1 is the start side manhole and the other manhole M2 is the arrival side manhole, and the new pipe S is formed on the existing pipe K over the construction section between the adjacent manholes M1 and M2, The backfill material is filled in the space with the new pipe S, and the new pipe S is fixed to the existing pipe K.

  Next, the heat collecting tubes 3 are fitted into the two groove portions 100a of the belt-shaped member 100, that is, the two spiral groove portions Sa of the new pipe S that is formed by spirally winding the belt-shaped member 100 for each set span p. Include. In this case, it is possible to easily perform the fitting operation by providing the heat collecting tube 3 with an arc-shaped winding rod corresponding to the tube diameter of the new tube S in advance.

  On the other hand, after the support member 5 is fixed to the top of the pipe S of the newly installed pipe S via an anchor or the like, the forward main pipe 21 and the two main pipes 21 constituting the main pipe 2 are formed over the holding part 51 of the support member 5. The recovery pipes 22 and 221 are arranged and fixed in order. Of the three main pipes 2, the front and rear forward main pipes 21, 21 and the return main pipes 221, 221 located outside are provided with two cheeses 41 and sockets 44 for each set span p (see FIG. 4). ) In order and arranged over the construction section. Similarly, the main pipe 22 located in the center is connected in order through a socket (not shown) and arranged over the construction section. Next, on the other manhole M2 side, the ends of the two main pipes 22 and 221 constituting the main pipe 2 are connected via the U-shaped pipe joint 6, and the end of the forward main pipe 21 is connected to the cap 7. Close through. Further, the end portion of the folded main pipe 221 is closed via the cap 7 on one manhole M1 side.

  If the main pipe 2 is disposed, the conversion adapter 42 is connected to each of the two cheeses 41 in each span p of the forward main pipe 21, and the pipe joint 43 is connected to each conversion adapter 42. Each inlet end of the strip heat collecting pipe 3 is drawn out from the spiral groove Sa and inserted into each pipe joint 43 to be connected. Similarly, the conversion adapter 42 is connected to the two cheeses 41 in each span p of the folded main pipe 221, and the pipe joint 43 is connected to each conversion adapter 42, and then two strips in each span are collected. Each outlet end portion of the heat pipe 3 is inserted into each pipe joint 43 and connected.

  Next, the circulation pipes h1 and h2 connected to the heat pump unit H installed in the vicinity of one manhole M1 and drawn into one manhole M1 are connected to one manhole M1 side end portion of the forward main pipe 21 and the main pipe 22. Just connect.

  In the sewage heat utilization system 1 constructed in this way, the heat exchange medium is circulated between the heat pump unit H and the sewage heat utilization system 1 by driving a pump (not shown) in the heat pump unit H. That is, the heat exchange medium discharged from the pump is supplied to the forward main pipe 21 via the circulation pipe h1, and is branched into two heat collecting pipes 3 of each span p connected in parallel to the forward main pipe 21 via the joint portion 4. Is done. Here, the heat exchange medium supplied to the two heat collecting tubes 3 in each span p flows down the heat collecting tubes 3 wound spirally along the inner peripheral surface of the new tube S. At this time, the heat exchange medium exchanges heat with the sewage flowing down the pipe bottom of the new pipe S and the heat collection pipe 3 every time the heat collection pipe 3 passes through the pipe bottom of the new pipe S. Then, the heat exchange medium that exchanges heat with the sewage over each span p joins the main pipe 221 turned back through the joint portion 4, and then returns to the heat pump unit H through the main pipe 21 and the circulation pipe h 2. It is supplied to the forward main pipe 21 via a circulation pipe h1 via a pump, circulates between the heat pump unit H, and exchanges heat with sewage. Thereby, the heat exchange medium returned to the heat pump unit H can be heat-exchanged via a heat exchanger (not shown), and can be used as a heat source or a cold source.

  In this case, the heat collecting pipe 3 is in direct contact with the sewage, and is wound spirally in the set span p and is in contact with the sewage many times, so that the sewage heat can be efficiently recovered. In addition, since the gas layer in the upper part of the new pipe S, which has the same temperature as the sewage, is contacted many times, recovery of the heat of the gas layer can also be expected. In addition, it is possible to reduce the dissipation of recovered heat when the heat exchange medium is transported in the main pipe 2. In particular, with respect to the heat collecting tube 3, more sewage heat can be recovered by adopting the two heat collecting tubes 3. Moreover, since the sewage heat is collected by forming the new pipe S in the existing pipe K, it is not necessary to excavate roads and the like, and the cost can be reduced and the construction period can be shortened. Furthermore, since the main pipe 2 and the heat collecting pipe 3 are disposed in the new pipe S, maintenance and inspection work can be easily performed. Moreover, since the heat collection pipe | tube 3 is connected in parallel for every span p set with respect to the main pipe 2, the pressure loss accompanying piping resistance can be suppressed, and it arrange | positions irrespective of the length of a construction area. It is possible to collect sewage heat over the construction section.

  In the above-described embodiment, the heat collecting tube 3 has been described in the case where the new tube S is manufactured and then fitted into the spiral groove portion Sa formed on the inner peripheral surface thereof. The heat collecting tube 3 may be fitted in 100a (see FIG. 7), and the new tube S may be formed by spirally winding the belt-like member 100 holding the heat collecting tube 3. If constructed in this way, the work of fitting the heat collecting tube 3 is eliminated, and the working time can be shortened. In this case, when the belt-shaped member 100 is formed and wound on the drum, the heat collecting tube 3 may be fitted into the groove portion 100a of the belt-shaped member 100, or at the construction site, the belt-shaped member 100 is drawn out from the drum and placed in the existing tube K. When feeding, the heat collection tube 3 may be fitted into the groove 100a.

  Further, in the above-described embodiment, after the new pipe S is manufactured and the space between the existing pipe K and the new pipe S is filled with the backfill material, the main pipe 2 and the heat collecting pipe 3 are disposed in the new pipe S. Although the case was illustrated, after producing the new pipe S, the main pipe 2 and the heat collecting pipe 3 are disposed in the new pipe S, and then the space between the existing pipe K and the new pipe S is filled with the backfilling material. It may be.

  By the way, in the above-described embodiment, the case where the main pipe 2 and the heat collecting pipe 3 are disposed inside the new pipe S manufactured inside the existing pipe K is illustrated, but the outside of the new pipe S, that is, the existing pipe The main pipe 2 and the heat collecting pipe 3 can also be disposed by utilizing the space between the pipe K and the new pipe S (see FIG. 8).

  In this case, as shown in FIG. 9, the heat collecting tube 3 is provided between the adjacent reinforcing ribs 209 and 209 and between the joint recesses 204 as the reinforcing ribs, which are erected on the back surface side of the conventionally known belt-like member 200. By arranging and producing the new pipe S, it is possible to arrange the heat collecting pipe 3 continuously spirally on the outer peripheral surface of the new pipe S.

  The band-shaped member 200 has basically the same function as the band-shaped member 100 described above, and a detailed description of the member having the same function as the band-shaped member 100 is provided by using the last two digits. Omitted.

  In order to construct the heat collection system 1 in which the heat collection pipe 3 is disposed on the outer peripheral surface of the new pipe S, first, the support member 5 is attached to the top of the existing pipe K at a set interval via an anchor or the like. After fixing, one forward main pipe 21 and two return pipes 22 and 221 constituting the main pipe 2 are disposed and fixed in order over the holding portion 51 of the support member 5. Of the three main pipes 2, the front and rear forward pipes 21 and the outer return main pipe 221 located on the outside are connected in order via two cheeses 41 and sockets 44 for each set span p, Arranged over the section. Similarly, the main pipe 22 located in the center is connected in order through a socket (not shown) and arranged over the construction section. Next, on the other manhole M2 side, the ends of the two main pipes 22 of the main pipe 2 are connected via the U-shaped pipe joint 6, and the other manhole M2 side end of the forward main pipe 21 and the end are folded back. The one end of the main pipe 221 on the side of the manhole M1 is closed via the cap 7.

  If the main pipe 2 is arranged with respect to the existing pipe K, the belt-like member 200 having the heat collecting pipe 3 arranged on the back side is drawn out spirally from the transport drum installed on the ground on the one manhole M1 side, and the existing pipe is drawn. Introduced into a pipe making machine arranged in K, the pipe making machine is rotated around the axis of the existing pipe K to join the joints 204 and 206 of the adjacent belt-like members 200 to produce a new pipe S. The belt-shaped member 200 is newly supplied to the new pipe S that has been piped without rotating, and the axis of the existing pipe K is set so that the new pipe S has one manhole M1 as the start side manhole and the other manhole M2 as the arrival side manhole. Additional formation in the direction. At this time, the heat collecting tube 3 is spirally disposed along the outer peripheral surface of the new pipe S as the new pipe S is manufactured.

  Once the new pipe S has been produced for the set span p, the pipe making operation is interrupted, and the conversion adapters 42 are connected to the two cheeses 41 in each span p of the folded main pipe 221, respectively. After connecting the pipe joints 43 to the conversion adapters 42, the outlet ends of the two heat collecting pipes 3 in the preceding span p are inserted into the pipe joints 43 and connected. Similarly, the conversion adapters 42 are connected to the two cheeses 41 in the span p following the forward main pipe 21, and the pipe joints 43 are connected to the conversion adapters 42 respectively. 3 is inserted into each pipe joint 43 and connected.

  In this way, after the new pipe S is produced for each span p, the outlet end portion of the heat collecting pipe 3 of the span p preceding the folded main pipe 221 is connected via the joint portion 4, and While repeatedly connecting the inlet end of the heat collecting pipe 3 of the span p following the main pipe 21 via the joint portion 4, the heat collecting pipe 3 is disposed over the construction section and connected to the main pipe 2.

  Further, in one manhole M1, the inlet end portions of the two heat collecting tubes 3 in the span p serving as the start end are connected to the start end side joint portion 4 of the forward main tube 21. Similarly, in the other manhole M2, the outlet end portions of the two heat collecting tubes 3 in the span p that terminates are connected to the terminal-side joint portion 4 of the folded main tube 221.

  Also in the heat collection system 1 constructed in this way, by driving a pump (not shown) in the heat pump unit H, the heat exchange medium discharged from the pump is supplied to the forward main pipe 21 via the circulation pipe h1, The pipe is branched into two heat collecting pipes 3 of each span p connected in parallel to the forward main pipe 21 via the joint portion 4. Here, the heat exchange medium supplied to the two heat collecting tubes 3 in each span p flows down the heat collecting tubes 3 wound spirally along the outer peripheral surface of the new tube S. At this time, the heat exchange medium exchanges heat through the new pipe S and the heat collection pipe 3 with the sewage flowing down the pipe bottom of the new pipe S every time the heat collection pipe 3 passes through the bottom of the new pipe S. The heat exchange medium that exchanges heat with the sewage over each span p joins the main pipe 221 that is turned back through the joint portion 4, and then returns to the heat pump unit H through the main pipe 22 and the circulation pipe h 2. It is supplied to the forward main pipe 21 via a pump, circulates between the heat pump unit H, and exchanges heat with sewage. Thereby, the heat exchange medium returned to the heat pump unit H can be heat-exchanged via a heat exchanger (not shown), and can be used as a heat source or a cold source.

  In this case, the heat collection pipe 3 comes into contact with the sewage through the new pipe S, and is wound spirally in the set span p and comes into contact with the sewage many times, so that the sewage heat is efficiently recovered. be able to. In addition, since the air layer in the upper part of the new pipe S, which has the same temperature as the sewage, is contacted many times through the new pipe S, recovery of the heat of the air layer can also be expected. In addition, it is possible to reduce the dissipation of recovered heat when the heat exchange medium is transported in the main pipe 2. In particular, with respect to the heat collecting tube 3, more sewage heat can be recovered by adopting the two heat collecting tubes 3. Moreover, since the sewage heat is collected by forming the new pipe S in the existing pipe K, it is not necessary to excavate roads and the like, and the cost can be reduced and the construction period can be shortened. Moreover, since the heat collection pipe | tube 3 is connected in parallel for every span p set with respect to the main pipe 2, it can suppress the pressure loss accompanying piping resistance, and installs irrespective of the length of a construction area. In addition, sewage heat can be recovered over the entire construction section.

  In the above-described embodiment, the case where heat is collected by exchanging heat with the sewage flowing down the sewer pipe is exemplified, but the fluid flowing through the existing pipe K buried in the ground is not limited to sewage, for example, the upper The heat held by water or agricultural water can also be collected.

DESCRIPTION OF SYMBOLS 1 Heat collection system 2 Main pipe 21 Outward main pipe 22,221 Recovery main pipe 3 Heat collection pipe 4 Joint part 41 Cheese 42 Conversion adapter 43 Pipe joint 5 Support member 100,200 Strip member H Heat pump unit S New pipe K Existing pipe M1, M2 Manhole

Claims (17)

A heat collection system such as sewage heat,
While pipe producing the new tube inside the existing pipe embedded in the ground, with respectively disposed main and Tonetsu tube of the heat exchange medium in the inner portion of the new pipe, each set span heat pipe adopted against main Connected to
The new pipe is formed by spirally winding a band-shaped member formed with joints on both side edges, and bonding the adjacent band-shaped members to each other.
The band-shaped member has a groove formed on the surface side, and a heat collecting tube is disposed in a spiral groove formed on the inner peripheral surface of a new pipe manufactured by the band-shaped member,
A heat collection system for sewage heat or the like, wherein a heat exchange medium is branched from a main pipe to each heat collection pipe, and heat is exchanged with a fluid flowing down a new pipe and returned to the main pipe. In Tonetsu system such as sewage heat according to claim 1, Tonetsu systems such as sewage heat, characterized in that said main pipe is supported by a supporting member fixed to the new tube.   While a new pipe is manufactured inside an existing pipe buried in the ground, a heat exchange medium main pipe and a heat collection pipe are respectively arranged outside the new pipe, and a heat collection pipe is arranged for each set span with respect to the main pipe. A heat collection system for sewage heat or the like, wherein the heat exchange medium is connected, branches from the main pipe to each heat collection pipe, and exchanges heat with the fluid flowing down the new pipe and returns to the main pipe. The heat collection system such as sewage heat according to claim 3 , wherein the new pipe is spirally wound around a belt-like member having joints formed on both side edges, and the joints of adjacent belt-like members are joined together. A heat collection system for sewage heat, etc. The heat collecting system for sewage heat or the like according to claim 1 or 3 , wherein the main pipe is composed of one forward main pipe and two reverse pipes, or one forward main pipe and one reverse pipe, and each span. A heat collecting system for sewage heat or the like, wherein the heat collecting pipe is connected in parallel with the forward main pipe and the main main pipe. The heat collection system for sewage heat or the like according to claim 1 or 3 , wherein the heat collection pipe of each span is connected to the main pipe via a joint portion. The heat collection system for sewage heat or the like according to claim 2 , wherein the main pipe is disposed in an upper half portion of the new pipe.   The heat collection system for sewage heat or the like according to claim 3, wherein the main pipe is supported by a support member fixed to an existing pipe.   The heat collection system for sewage heat or the like according to claim 3, wherein each of the heat collection pipes is branched from the main pipe and wound spirally along the outer peripheral surface of the new pipe. Thermal system.   5. A heat collecting system such as sewage heat according to claim 4, wherein a plurality of reinforcing ribs are erected on the back surface side of the belt-shaped member, and adjacent to the outer peripheral surface of a new pipe made by the belt-shaped member. A heat collecting system such as sewage heat, wherein a heat collecting tube is disposed between the reinforcing ribs.   In the existing pipe, joints are formed on both side edges and a belt-like member having a groove on the surface side is spirally wound, and the joints of adjacent belt-like members are joined together to produce a new pipe. After the pipe is installed, the heat collecting pipe is arranged in the spiral groove formed on the inner peripheral surface of the new pipe, and the main pipe is arranged inside the new pipe, and the heat collecting pipe is connected to the main pipe every set span. A construction method of a heat collection system such as sewage heat. In construction methods of Tonetsu systems such sewage heat according to claim 11, prior to disposing the adopted heat pipe in a spiral groove portion of the new pipe, or, with the existing pipe arrangement after casting the new tube A method for constructing a heat collection system such as sewage heat, characterized by filling a space with a backfill material. 12. The construction method of a heat collection system for sewage heat or the like according to claim 11 , wherein the heat collection pipe is preliminarily provided with a winding rod corresponding to the spiral groove of the new pipe. System construction method. In the construction method of the heat collection system such as sewage heat according to claim 11 , the heat collection pipe is drawn out from the spiral groove of the new pipe and connected to the joint provided at the branch point of the main pipe. Construction method of heat collection system such as sewage heat. 12. The construction method for a heat collection system for sewage heat or the like according to claim 11 , wherein the main pipe is disposed in an upper half portion of the new pipe.   In an existing pipe, joints are formed on both side edges, and a belt-like member in which a groove is formed on the surface side and a heat collecting tube is disposed in the groove is spirally wound, and a joint between adjacent belt-like members Sewage characterized in that, after joining each other and producing a new pipe, a main pipe is arranged inside the new pipe, and a heat collecting pipe is drawn out from the spiral groove and connected to the main pipe every set span. Construction method of heat collection system such as heat.   After disposing the main pipe inside the existing pipe, in the existing pipe, joints are formed at both side edges, and a plurality of reinforcing ribs are erected on the back side, and the heat collecting pipe is between the adjacent reinforcing ribs. Is wound in a spiral, the joints of adjacent belt members are joined together, and a new pipe is intermittently made for each set span. A method for constructing a heat collecting system such as sewage heat, characterized by connecting the heat collecting tubes of each span.

Images