JP4859871B2 - Buried pipe for heat exchange - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buried pipe for heat exchange, enabling maintenance and facilitating maintenance work. <P>SOLUTION: This buried pipe 1 for heat exchange is at least partly buried into the ground to utilize heat under the ground. In the buried pipe 1, an opening thereof that is buried into the ground is blocked up, and a blocking member 9 is provided to block up an upper opening on the opposite side to the buried side. An upper side surface of the buried pipe 1 on the opposite side to the buried side is provided with a cutout part 3 for guiding a pipe 2 where a heat medium flows inside and outside the buried pipe 1 and protecting the same. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a buried pipe for heat exchange that is buried in the ground and used in order to use underground heat for air conditioning, radiant cooling and heating, hot water supply, and the like.

  The underground temperature is relatively stable with little temperature change throughout the year. Therefore, for example, in the Japanese climate, the underground temperature is low with respect to the outside temperature in the summer and is high with respect to the outside temperature in the winter. Then, the apparatus utilized as heat sources, such as an air conditioning, is proposed by exchanging heat between the underground and the ground using the foundation pile buried under the foundation of the building.

  For example, Patent Document 1 discloses a technique in which piping is provided inside a foundation pile buried under the foundation and heat exchange is performed through water or the like in the pipe. In Patent Document 1, a heat exchange pipe piped inside a pile is drawn out as it is from the pile head and is integrally provided on the foundation of the building on the pile head.

  Patent Document 2 discloses a hollow foundation pile driven into the ground during construction of a building and a heat medium injected into the hollow of the foundation pile or a heat medium extracted from the hollow of the foundation pile. An underground heat storage device including an air conditioning device is disclosed. Also in this patent document 2, the heat-medium heat exchanger tube extended from the hollow inside of a foundation pile is withdraw | derived to the upper part as it is from the pile head, and is integrally provided in the foundation mat of the building on a pile head.

JP-A-1-123951 JP-A-8-184063

  However, in the technique disclosed in Patent Document 1 above, a foundation pile buried under the foundation of the building is used, and further, the pipe drawn out from the pile head as it is to the upper part is provided integrally with the foundation. For example, it has not been possible to cope with deterioration or clogging of piping arranged inside the pile, and maintenance has not been considered.

  Moreover, in the said patent document 2, although there exists opening in the building foundation part which hits on the opening of a pile head, and piping is drawn out from this opening, the foundation forms (for example, cloth foundation other than a solid foundation) are shown. For foundations and independent foundations, it is often difficult to provide an opening in the foundation at the top of the pile head due to the strength of the foundation, and even if it is possible to provide an opening, the pipe is drawn to the upper part of the foundation. There is a problem that it becomes necessary to provide a space for maintenance, and there is a restriction on the use of the upper space of the foundation.

  Therefore, the present invention has been made in view of the above-mentioned problems, and the object of the present invention is that maintenance is possible and maintenance work can be easily performed, and further, for use in the space above the buried pipe. The present invention provides a buried tube for heat exchange that has few restrictions and is easy to use effectively.

The typical configuration of the present invention for achieving the above object is to embed at least part of the heat exchange buried in the ground under the foundation of the building and use it as a foundation pile in order to use the heat in the ground. The buried pipe has a closing member that closes an upper opening opposite to the buried side, the opening on the side buried in the ground being blocked, and the buried side the side surface of the upper side or the closing member on the opposite side of the buried pipe and the guide portion of the heat medium is guided to and protect the pipe flowing into the embedded tube outer provided, wherein the guide portion under said foundation It is located in, and guides the piping in the said buried pipe out of the said buried pipe under the said foundation .

  According to the above configuration, the pipe can be taken in and out of the buried pipe from the upper opening of the buried pipe or the guide portion, and the filling material inside the buried pipe can be replenished / replaced. Maintenance can be performed when a problem occurs, and the maintenance work can be easily performed. In addition, when piping to the buried pipe, the pipe is guided to the guide part, and the pipe can be temporarily held by the guide part, so that the piping work becomes easy and required for the piping work. Time can be shortened. Further, even when a load is applied to the upper part of the buried pipe, the pipe is protected by the guide portion, so that the pipe can be prevented from being crushed by the load applied to the upper part of the buried pipe. Further, since the upper opening of the buried pipe is closed by the closing member, it is possible to prevent soil and the like from entering the buried pipe from the upper opening of the buried pipe. In addition, since the pipe is drawn out from the side surface of the buried pipe or the side surface of the closing member by the guide part and does not protrude from the upper part of the buried pipe, the buried pipe should be placed in a place other than the bottom of the foundation. The upper space can be used effectively.

  Specifically, for example, the guide portion is a cutout portion provided by cutting out the upper end portion of the buried pipe, or a hole portion formed in the upper side surface of the buried pipe. Is obtained.

  Alternatively, the above-described operations and effects can be similarly obtained by making the guide portion a notch provided by notching the side surface of the closing member or a hole formed by drilling the side surface of the closing member.

  As described above, according to the present invention, the upper opening of the buried pipe or the guide portion for guiding and protecting the pipe into and out of the buried pipe is used to put the pipe in and out of the buried pipe and the filler inside the buried pipe. Since replenishment and replacement are possible, maintenance can be performed when a problem occurs in the piping arranged inside the pipe, and the maintenance work can be easily performed. In addition, when piping to the buried pipe, the pipe is guided to the guide part, and the pipe can be temporarily held by the guide part, so that the piping work becomes easy and required for the piping work. Time can be shortened. Further, even when a load is applied to the upper part of the buried pipe, the pipe is protected by the guide portion, so that the pipe can be prevented from being crushed by the load applied to the upper part of the buried pipe. Further, since the upper opening of the buried pipe is closed by the closing member, it is possible to prevent soil and the like from entering the buried pipe from the upper opening of the buried pipe. In addition, since the pipe is drawn out from the side surface of the buried pipe or the side surface of the closing member by the guide part and does not protrude from the upper part of the buried pipe, the buried pipe should be placed in a place other than the bottom of the foundation. The upper space can be used effectively.

  Specifically, for example, the guide portion is a cutout portion provided by cutting out the upper end portion of the buried pipe, or a hole portion formed in the upper side surface of the buried pipe. Is obtained.

  Alternatively, the above-described operations and effects can be similarly obtained by making the guide portion a notch provided by notching the side surface of the closing member or a hole formed by drilling the side surface of the closing member.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of a buried pipe for heat exchange according to the invention will be described in detail with reference to the drawings.

  The buried pipe for heat exchange according to the present invention is a buried pipe for heat exchange that is used by burying at least a part thereof in the ground in order to use the underground heat. A heat exchanging pipe with at least a portion buried in the ground is a buried pipe in which the entire pipe is buried in the ground, or a buried pipe that is buried in the ground so that a portion is exposed to the outside. Etc.

  Moreover, as the buried pipe for heat exchange according to the present invention, for example, an existing pile such as a steel pipe pile, a concrete pile, a soil cement composite pile in which a soil cement pillar and a steel pipe pile are integrated is used for a building foundation. Can be mentioned. In addition, the buried pipe for heat exchange according to the present invention is not limited to the above-mentioned pre-built pile, and is any buried pipe that is used to bury at least a part in the ground and use the heat in the ground. Other buried pipes may be used.

  When using a heat exchanging buried pipe as described above in a geothermal heat utilization device, a heat exchanging pipe is arranged inside the hollow of the heat exchanging buried pipe, and the space between the pipe and the buried pipe main body is filled. A material is appropriately filled, and the heat in the ground is used by flowing a heat medium in the pipe.

  In addition, water, oil, antifreeze, air etc. are mentioned as a heat medium which lets the said piping for heat exchange pass. Examples of fillers that fill the space between the heat exchange pipe and the buried pipe body include water, oil, antifreeze, sand, gravel, lightweight aerated concrete, metal pieces, steel balls, and stainless steel spheres. Among them, water, oil, and antifreeze are particularly preferable.

  In the buried pipe for heat exchange according to the present invention, the opening on the side buried in the ground is closed. As a method of closing the buried pipe opening on the side buried in the ground, it is most preferable to block the tip or the middle of the buried pipe in advance with a closing member such as a lid or a barrier before the buried pipe is buried. It is also possible to close the buried pipe by dropping cement, adhesive or the like from the inside of the buried pipe to the tip.

  Furthermore, the buried pipe for heat exchange according to the present invention has a closing member that closes the upper opening on the side opposite to the buried side, on the upper side surface of the buried pipe on the side opposite to the buried side, It is the structure which provided the guide part for guiding and protecting the piping through which a heat medium flows into and out of the said buried pipe. The configuration of the buried pipe for heat exchange will be specifically described with reference to the drawings.

For example, as shown in FIG. 1A, a heat exchanging buried pipe 1 according to the present invention includes a removable closing member 9 that closes an upper opening of the buried pipe 1 after the pipe 2 is installed in the buried pipe 1. have. Further, on the upper side surface of the buried pipe 1, a notch 3 is formed by notching the upper end of the buried pipe 1 as a guide part for guiding and protecting the pipe 2 in and out of the buried pipe 1 .

As described above, by providing the notch portion 3 as the guide portion on the upper side surface of the buried pipe 1, when replacing the pipe 2 inside the buried pipe 1 , the removable opening member 9 can be removed from the upper opening by removing the detachable closing member 9. Since the pipe 2 can be taken in and out and the filling material inside the buried pipe 1 can be replenished / replaced, it is possible to perform maintenance, such as dealing with deterioration and clogging of the pipe 2 arranged inside the buried pipe 1 , and Maintenance work can be easily performed.

Further, when the piping work of the buried pipe 1, the pipe 2 the guided into the notch 3, also because it is possible to temporarily hold the pipe 2 by the notch 3, the buried pipe 1 inside and outside out and the pipe 2 in the pipe 2 is a pipe work such as connecting work of the case composed of a plurality members is facilitated, thereby shortening the time required for the piping work.

  Further, even when a load is applied to the upper part of the buried pipe 1, the pipe 2 is protected by the notch 3, and therefore the pipe 2 is prevented from being crushed by the load applied to the upper part of the buried pipe 1. Can do.

In addition, since the upper opening of the buried pipe 1 is closed by the closing member 9, it is possible to prevent soil and the like from entering the buried pipe 1 from the upper opening of the buried pipe 1. In addition, the pipe 2 is drawn out from the side surface of the buried pipe 1 by the notch part 3 as the guide part and does not protrude from the upper part of the buried pipe 1. Thus, the space above the buried pipe 1 can be used effectively.

Note that the shape of the notch 3 as the guide is not limited to the shape shown in FIG. 1A, and any shape and size that guides and protects the pipe 2 in and out of the buried pipe 1. a soil good UNA shape may be.

In the above-described embodiment, as the guide portion included in the heat exchanging buried pipe 1 according to the present invention, the notched portion 3 provided on the upper side surface of the buried pipe 1 by notching the upper end portion of the buried pipe 1 as shown in FIG. However, the present invention is not limited to this.

  For example, the guide part of the buried pipe 1 for heat exchange may be a hole 4 in which an upper side surface of the buried pipe 1 is drilled as shown in FIG. By configuring in this way, the same operation and effect as the above-described embodiment can be obtained.

  Further, as shown in FIG. 2 (b), a cylindrical guide member 12 may be provided in the hole 4 of the buried pipe 1. By comprising in this way, the space | gap between the piping 2 can be easily plugged up with an adhesive tape or the like.

Further, the closing member 9 that closes the upper opening of the buried pipe 1 is not limited to the detachable closing member 9 that covers the upper side surface of the buried pipe 1 as shown in FIG. A detachable closing member 10 inserted into the upper opening of the buried pipe 1 may be used as shown in FIG. In the case of this closure member 10, it is good also as a structure by which the screw is cut in the insertion part 10a. Further, when the buried pipe 1 is provided under the foundation, a closing member 11 as shown in FIG. 1B may be welded to the upper opening of the buried pipe 1 and closed. The material of these closing members 9 to 11 may be the same material as that of the buried pipe 1 or plastic.

In the above-described embodiment, the configuration in which the guide portion such as the cutout portion 3 and the hole portion 4 is provided on the upper side surface of the buried pipe 1 on the side opposite to the buried side is exemplified. It is not limited to. For example, it is good also as a structure which provided the guide part for guiding and protecting the piping 2 in and out of the buried pipe 1 in the side surface of the obstruction | occlusion member which block | closes the upper opening of the said buried pipe 1. FIG.

  Specifically, the guide portion provided on the side surface of the closing member may be a cutout portion 5a provided by cutting out the side surface of the closing member 5 as shown in FIG. As shown in b), it may be a hole 6a in which the side surface of the closing member 6 is formed.

With this configuration, by providing the notch 5a and the hole 6a as guide portions on the side surfaces of the closing members 5 and 6, respectively, when replacing the pipe 2 inside the buried pipe 1 , it is detachable. If the closing members 5 and 6 are removed, the pipe 2 can be taken in and out from the upper opening and the filling material inside the buried pipe 1 can be replenished / replaced, so that the pipe 2 arranged in the buried pipe 1 is deteriorated or clogged. Maintenance is possible, such as being able to cope with it, and maintenance work can be easily performed.

  Even when a load is applied to the upper part of the buried pipe 1, the pipe 2 is protected by the notch 5a and the hole 6a, and therefore the pipe 2 is crushed by the load applied to the upper part of the buried pipe 1. Can be prevented.

Further, since the upper opening of the buried pipe 1 is closed by the closing members 5 and 6, it is possible to prevent soil and the like from entering the buried pipe 1 from the upper opening of the buried pipe 1. Further, since the pipe 2 is drawn out from the side surfaces of the closing members 5 and 6 by the notch part 5a and the hole part 6a as the guide part and does not protrude from the upper part of the buried pipe 1, the buried pipe 1 is located at a place other than the base. In the case where it is arranged, the space above the buried pipe 1 can be used effectively.

Furthermore, by using the closing members 5 and 6 that close the upper opening of the buried pipe 1, the side portions of the closing members 5 and 6 are provided with guide portions such as the notches 5 a and the holes 6 a, The existing buried pipe 1 that does not have the guide portion can be used, and when the existing buried pipe 1 is used, there is no need for processing, and a separate separate member that has the guide portion needs to be provided separately. Because there is no, it can prevent the cost increase.

In addition, although it was mentioned above that the steel pipe pile as an existing pile used for the foundation of a building can be used as the buried pipe 1 for heat exchange according to the present invention, when this steel pipe pile is used as the buried pipe 1 for heat exchange, It is preferable to use a steel pipe pile having a spiral wing for screwing a pile having an outer diameter larger than the outer diameter of the pile body (specifically, about 1.5 to 3 times) on the outer periphery of the pile body. Moreover, it is preferable to perform the construction method of the said steel pipe pile by the rotation embedding method which does not generate | occur | produce the residual soil. By constructing the steel pipe pile by the rotational embedding method, the earth and sand that has been excavated and softened at the time of embedding are pressed against the side of the pile without being discharged and compressed, so that the density of the earth and sand around the pile increases and the thermal conductivity increases. For this reason, the efficiency of heat exchange is improved.

Further, the pipe 2 of the heat exchanger to be installed in the heat exchanger for buried pipe 1, as shown in FIG. 4, the heat medium from the buried pipe inside 1 a feeding tube 2a for introducing the heat medium into the buried pipe 1 The return pipe 2b which flows out is provided. Further, the pipe 2 for heat exchange in the buried pipe 1, Fig. 4 the tube 2a of the feed tube 2a and the went back tube 2b is provided separately in the buried pipe 1 as shown in (a), 2b end However, it is preferable that the feed pipe 2a and the return pipe 2b are continuously connected as shown in FIG. 4B. .

Further, the pipe 2 for heat exchange in said buried pipe 1 is preferably the surface area per unit length as compared to without unevenness pipe 2 is increased, also bending Easy-to pipe 2. In particular, as shown in FIG. 4C, it is preferable to use a bellows-like pipe 2 such as a flexible pipe whose pipe wall shape is corrugated in the length direction, and it is easy to increase the endothermic area and bend it. By using this pipe 2 , it is not necessary to connect the heat exchange pipe 2 in the buried pipe 1 even when the pipe 2 for heat exchange is put into the buried pipe 1 at the time of construction. There is no need to prepare a tube. Moreover, by making the pipe 2 into a corrugated shape as shown in FIG. 4C, the flow of the heat medium passing through the pipe 2 becomes turbulent, and the efficiency of heat exchange is further increased.

The material for the heat exchange pipe 2 may be arbitrarily made of metal or plastic, but the metal pipe 2 is preferably a copper pipe, stainless steel pipe, aluminum pipe, steel pipe, etc. Is mentioned. Among these, a stainless steel tube is particularly preferable. Further, the number of the pipes 2 passing through the inside of one buried pipe 1 may be plural.

Further, the shape of the pipe 2 in the buried pipe 1 is a normal one having no irregularity, and a pipe wall shape as shown in FIG. 4C having a corrugated shape in the length direction (flexible pipe or the like). The thing which attached the heat sink (fin) to the piping 2 surrounding surface, etc. are mentioned. Particularly preferable is the bellows-like pipe 2 as described above, and the uneven shape widens the surface area of the heat exchange, and the flow of the heat medium in the pipe 2 becomes a turbulent flow, so that the heat exchange efficiency is improved. In addition, since the bellows-like pipe 2 such as a flexible pipe is a scroll, it is easy to carry to the construction site and has excellent bending workability, so that it is excellent in workability such as in and out of the buried pipe 1. ing.

In addition, when constructing a system as a geothermal heat utilization apparatus using the above-described heat exchanging buried pipe 1 according to the present invention, for example, as shown in FIG. the pipe 2 of the heat exchanger for buried pipe 1, the pipe 7 in a building, such as a circulation pump 8 for circulating the heat medium in the pipe 7 and the like. The circulation pump 8 only needs to have sufficient ability to circulate the heat medium in the pipe 7 . Examples of the place where the pipe 7 is installed in the building include a wall, a floor, a ceiling, a roof, and a foundation. Moreover, the piping 7 in this building may be incorporated in a panel such as a floor heating hot water panel. Further, the pipe 7 and the pipe 7 of a heat exchanger for buried pipe 1 in buildings may be connected by piping, or a pipe 7 from the pipe 7 and the heat exchanger buried pipe 1 in the building as needed A boiler, a heat pump, or the like that uses heat obtained from the ground as a heat source may be incorporated as a system. Piping connecting the pipe 7 of the pipe 7 and the heat exchanger for buried pipe 1 in the building is made, for the pipe diameter may be determined arbitrarily depending on the usage mode.

When the underground pipe 1 for heat exchange according to the present invention described above is used for a geothermal heat utilization device, the underground pipe 1 is a foundation pile buried under the foundation of a building for ground improvement as described above. You may utilize, and you may utilize the underground pipe | tube 1 embed | buried in places other than the foundation of a building.

For example, as shown in FIG. 6, when a foundation pile buried under a foundation 13 of a building is used as the buried pipe 1 for heat exchange, a large notch portion 3 is provided as the guide portion. The configuration. In this case, since the buried pipe 1 (foundation pile) buried under the building foundation 13 is a place where a large force is applied, the closing member 11 that closes the upper opening of the buried pipe 1 has a high rigidity as shown in FIG. It is set as the structure which welded this obstruction | occlusion member 11 to the buried pipe 1 upper part using the obstruction | occlusion member 11 of the shape which receives widely. By configuring in this way, even if the buried pipe 1 provided under the foundation 13 is replaced with the pipe 2 inside the buried pipe 1 , the pipe pit 14 passes through the notch portion 3 to the inside and outside of the buried pipe 1. The pipe 2 can be taken in and out, and the filler inside the buried pipe 1 can be replenished / replaced, so that maintenance such as the deterioration and clogging of the pipe 2 arranged in the buried pipe 1 becomes possible. In addition, maintenance work can be easily performed.

In addition, the example of a location other than the bottom of the foundation 13, and under the building other than the basic 13 under, a vacant lot of building periphery such as garden, road, there is a parking lot or the like. Even in such a place, when replacing the buried pipe 1 inside the pipe 2, since out from the upper opening or the aforementioned guide portion of the buried pipe 1 of the pipe 2 can be, within the buried pipe 1 Maintenance can be performed, for example, it is possible to cope with deterioration and clogging of the pipe 2 arranged, and maintenance work can be easily performed.

  As an application example of the present invention, in order to use underground heat for air conditioning, radiant cooling and heating, hot water supply, etc., the present invention can be applied to a buried pipe for heat exchange that is embedded in the ground.

The schematic diagram which shows the notch which the buried pipe for heat exchange which concerns on this invention has The schematic diagram which shows the hole which the buried pipe for heat exchange which concerns on this invention has The schematic diagram which shows the guide member which the buried pipe for heat exchange which concerns on this invention has Schematic diagram showing an example of piping for heat exchange Schematic diagram showing an example of the system configuration of a geothermal heat utilization device The schematic diagram which shows an example of the structure which has laid the underground pipe for heat exchange which concerns on this invention under the building foundation

DESCRIPTION OF SYMBOLS 1 ... Embedded pipe for heat exchange 2 ... Pipe for heat exchange 2a ... Feed pipe 2b ... Return pipe 3 ... Notch part 4 ... Hole part 5 ... Blocking member 5a ... Notch part 6 ... Blocking member 6a ... Hole part 7 ... Pipe 8 ... circulation pump 9 ... occlusion member 10 ... occlusion member 10a ... insertion part 11 ... occlusion member 12 ... guide member 13 ... base 14 ... piping pit

Claims (3)

In order to use the underground heat, it is a buried pipe for heat exchange that is used as a foundation pile by burying at least a part in the ground under the foundation of the building,
The buried pipe has a closing member that closes an upper opening on the side opposite to the buried side, the opening on the side buried in the ground is closed,
Provided on the upper side of the buried pipe opposite to the buried side or the side of the closing member is a guide portion for guiding and protecting the pipe through which the heat medium flows into and out of the buried pipe ,
The guide pipe is located under the foundation and guides the pipe in the buried pipe to the outside of the buried pipe under the foundation . 2. The buried pipe for heat exchange according to claim 1, wherein the guide part is a cutout part provided by cutting out an upper end part of the buried pipe or a hole part formed in an upper side surface of the buried pipe. . 2. The buried pipe for heat exchange according to claim 1, wherein the guide portion is a cutout portion provided by cutting out a side surface of the closing member, or a hole portion formed by drilling a side surface of the closing member.

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