JP2006017419A - Underground heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve reduction of a construction cost of an underground heat exchanger by focusing attention on a ground anchor having the same construction form. <P>SOLUTION: The present invention is comprosed by focusing attention on a point that a ground anchor constructed for reinforcement, stabilization, or the like of the ground, a structure, or the like has the same construction form as burying of a pipe body of the underground heat exchanger, and a point that the underground heat exchanger is positioned in an interior or a periphery of a structure. In the underground heat exchanger 10, a remaining clad pipe 14 left in the ground after removing a tension member in a removable anchor 16 using an unbonded type tension member is used as the pipe body to be used as a circulating passage of fluid. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ground heat exchanger that collects geothermal heat and uses it on the ground, or performs heat radiation that releases heat generated on the ground to the ground.

  For example, a tube such as a concentric double tube connected at the insertion tip or an integral U-shaped tube is embedded in the ground, and ground heat is collected by circulating fluid through this tube and used on the ground. In recent years, attention has been paid to effective use of geothermal heat, which is one of natural energy, and countermeasures against global warming.

  Here, the pipe body of this underground heat exchanger is normally inserted and arranged in a drilling hole formed by excavating the ground, and is buried in the ground by consolidating it under a grout. That is, in the construction of this underground heat exchanger, excavation of the ground and grouting in the drilling hole are required at least as work in the construction.

However, since excavation of the ground and construction work such as grouting in the borehole are relatively costly, the installation of this underground heat exchanger is effective for the use of underground heat and global warming. While it contributes to global environmental conservation such as measures to protect the environment, it cannot be denied that it is accompanied by increased costs.
JP 2003-130471 A JP 2003-302108 A

  The problem to be solved is that the installation cost of the underground heat exchanger is increased.

  In view of the above problems, the present invention has a ground anchor that is constructed for the purpose of reinforcing, stabilizing, etc. the ground, structures, etc., and has a construction mode similar to that of embedding a tubular body of an underground heat exchanger, and It was made by paying attention to the point located inside or around the structure.

  That is, the underground heat exchanger according to the first aspect of the present invention is a removable anchor using an unbonded tensile material, and a residual cladding tube remaining in the ground after removing the tensile material is used as a fluid circulation channel. Its main feature is to use it as a tube.

  According to a second aspect of the present invention, the residual cladding tube in the removable anchor, which is folded back in a substantially U shape under a predetermined load bearing body, is used as a tubular body serving as a fluid circulation channel. Is the most important feature.

  Furthermore, a third aspect of the present invention provides a substantially straight line in a removable anchor that is linearly assembled to a predetermined load-bearing body under a fixed gripping of the tip by a predetermined tip holder. The main feature is that the two residual coated tubes can be used as a tube serving as a fluid circulation channel under internal communication via a predetermined hollow communication tool.

  And the underground heat exchanger of this invention which concerns on Claim 4 assembled | attached previously the pipe body folded back in the substantially U shape with respect to the uncurtain don of a permanent anchor, and this uncurtain don with respect to a predetermined anchor hole. The most important feature is that this pipe body embedded in the ground under the insertion arrangement and consolidation is used as a pipe body serving as a fluid circulation channel.

  According to the first aspect of the present invention, the substantially U-shaped residual cladding tube left in the ground after removing the tensile material of the removable anchor is used as a fluid circulation channel in the underground heat exchanger. Since it is used, there is no need to embed and construct a pipe body dedicated to the underground heat exchanger, so there is an advantage that the construction cost for the underground heat exchanger can be surely reduced.

  Further, claim 2 of the present invention specifically shows a removable anchor that is used by folding an unbonded tensile material into a substantially U shape, and according to claim 2, the residual cladding tube is substantially integrated. Since it is U-shaped, there is an advantage that smooth circulation of the fluid can be easily ensured.

  Further, Claim 3 of the present invention specifically shows a removable anchor using a plurality of substantially straight unbonded tensile materials, and in this Claim 3, two substantially straight embedments are embedded. Since the cladding tubes are internally communicated with each other by a predetermined hollow communication device installed between the tip holders, the configuration of the substantially straight buried cladding tube with the removable anchor of this configuration is also complicated. There is an advantage that it can be used as a tube body of an underground heat exchanger without accompanying.

  According to the fourth aspect of the present invention, in order to assemble the tubular body folded back into a substantially U shape in advance with respect to the uncurtain dong of the permanent anchor in advance, This tube body can be embedded in the ground under consolidation. Therefore, according to the fourth aspect, since the embedment and construction of the underground heat exchanger tube can be performed simultaneously with the construction of the ground anchor, it is possible to reliably reduce the construction cost as the underground heat exchanger. There is an advantage of being.

  The purpose of reducing the construction cost of the underground heat exchanger was made feasible by focusing on ground anchors with similar construction modes.

  FIG. 1 is a schematic longitudinal sectional view of a ground heat exchanger 10 according to a first embodiment of the present invention. In this first embodiment, a fluid circulation channel embedded in the ground 12 and As the tubular body 14, a substantially U-shaped residual cladding tube of the removable anchor 16 that remains in the ground after removing the tensile material is used.

  The structure of the removable anchor 16 is shown in FIG. As can be seen, in this removable anchor 16, a so-called unbonded tensile material 18 covered with a cladding tube 14 made of, for example, a polyethylene tube or the like is provided around a support member 20 called a load bearing body. It is hung and bundled in a substantially U shape, and this is inserted as an uncurtain dong 22 into an anchor hole 24 drilled by excavation of the ground 12 and fixed to the ground under a grout 26. .

  This type of removable anchor 16 is tensioned and fixed by pulling each end of the tension member 18 after being consolidated by the grout 26, and after achieving the construction purpose as an anchor, the substantially U-shaped cladding tube 14 is grounded. 12, the tension member 18 is removed from the ground under the traction of one of its ends.

  This removable anchor itself is one of the general temporary anchor methods for reinforcing, stabilizing, etc. the ground, structures, etc., and this method itself is not the gist of the present invention. Detailed description is omitted here.

  Here, in the present invention, the removal anchor 16 leaves the substantially U-shaped cladding tube 14 in the ground 12 after the tension member 18 is removed, and the construction position of the removal anchor is within the structure or Paying attention to the surrounding points, the remaining cladding tube is used as a tubular body serving as a fluid circulation channel of the underground heat exchanger 10 (see FIG. 1).

  As can be seen from FIG. 1, in the underground heat exchanger 10 of the first embodiment, the pipe line 30 forming the fluid flow path has a pipe body (buried cladding pipe) left by the removal of the tensile material 18. ) Connected to the 14 terminals via, for example, a joint 28. Then, the fluid is circulated under the drive of the pump 32 disposed in the conduit 30, so that the use of the underground heat in the utilization device 34 such as an air conditioning system disposed in the conduit can be performed. The underground heat exchanger 10 is configured as possible.

  As described above, in the underground heat exchanger 10 according to the present invention, the substantially U-shaped residual cladding tube 14 remaining in the ground 12 after the removal of the tensile member 18 of the removable anchor 16 is exchanged with the underground heat. Since it is used as a tubular body that serves as a fluid circulation path in the vessel 10, it is not necessary to embed and construct a tubular body dedicated to the underground heat exchanger, so that the construction cost can be reliably reduced.

  Moreover, since the arrangement | positioning form of the tension | tensile_strength material 18 in this removal type anchor 16 is a substantially U shape, the smooth circulation flow of a fluid can also be ensured easily.

  Here, in the first embodiment, the removable anchor 16 that folds and uses one tension member 18 in a substantially U shape is illustrated, but for example, as a combination of tension members arranged in a substantially straight line The stripping tube of the pulling anchor of the removable anchor can be used as a tube body of the underground heat exchanger as described above.

  FIG. 3 shows the removable anchor 116 using the tension material arranged in a substantially straight line.

  In this removable anchor 116, a plurality of, for example, two tension members 118 are assembled to the load-bearing body 120 while the tip end thereof is fixedly held by a predetermined tip holder 36 in the straight state. .

  The tip holder 36 is provided with a gripping means 40 such as a wedge that is biased in the gripping direction under the biasing force of the spring means 38. Normally, the gripping means causes the tensile material 118 to be pulled. It will be fixedly held by this tip holder.

  The tip holder 36 is configured to be able to release the grip under the axial movement of the tension member 118 in the tip direction. That is, if the tension member 118 is moved in the tip direction by a force against the urging force of the spring means 38 after the construction purpose as the anchor is achieved, as shown in FIG. By holding the gripping means at the grip release position by the predetermined stopper means 42, the holding force for the tension material is released, and the tension material with the cladding tube 14 as shown in the figure remains. Can be pulled out.

  Here, in this configuration, the tip holders 36 for each tension member are connected to each other by a predetermined hollow communication tool 44 so that they can communicate with each other.

  As shown in the figure, this hollow communication tool 44 is constructed and fixed to each tip holding tool 36 by a hollow bolt 46 penetrating the hollow portion.

  As shown in FIG. 4, in the second embodiment using the substantially straight-lined cladding tube 114, as in the first embodiment, the conduit 30 forming the fluid flow path is a tube. It is connected to each terminal of the body (cladding tube) 14 through, for example, a joint 28. Then, the fluid is circulated under the drive of the pump 32 disposed in the conduit 30, so that the use of the underground heat in the utilization device 34 such as an air conditioning system disposed in the conduit can be performed. The underground heat exchanger 10 is configured as possible.

  Even in such a configuration, since the buried cladding pipe 114 left in the ground 12 by removing the tensile material 118 is still used as a pipe body through which fluid is circulated, the construction cost can be surely reduced. I can take off.

  Then, by connecting the tip holders 36 so as to be able to communicate with each other by a predetermined hollow communication device 44, the respective buried cladding tubes (each tube body) 114 are internally communicated with each other, so that fluid circulation using each tube body is performed. Therefore, it is possible to easily secure the use of the buried cladding tube remaining in a substantially linear shape without complicating the configuration.

  By the way, although both said 1st Example and 2nd Example utilize the removable anchor which is a temporary anchor, it is not limited to this, A permanent anchor can also be utilized.

  In the case of using the permanent anchor 48, as shown in FIG. 5, the tubular body 214 folded in a substantially U shape is assembled in advance to the uncurtain don of the permanent anchor, and the uncurtain don is inserted into a predetermined anchor hole. A tube embedded under arrangement and consolidation is used as the tube serving as a fluid circulation channel.

  As shown in FIG. 5, when the permanent anchor 48 is used, the tubular body 214 folded back into a substantially U shape is assembled in advance to the permanent anchor uncurtain dong 222 in advance, and the anchor hole 24 of the ground 12 is assembled. The tube body is buried in the ground together with the uncurtain don under the insertion arrangement of the uncurtain dong with respect to and the consolidation by the grout 26.

  And the underground heat exchanger 10 is comprised by connecting the pipe line 30 which makes the flow path of the fluid which has utilization devices 34, such as a pump 32 and an air conditioning system, with this pipe body 214. As shown in FIG.

  In this configuration, the pipe 214 of the underground heat exchanger is also embedded in the ground 12 at the same time as the permanent anchor 48 is installed. In this case, the construction cost can be sufficiently reduced. I can be taken.

  Since this permanent anchor itself is known and its uncurtain don has a general configuration, a detailed description of this permanent anchor is omitted here.

  The above-described embodiments are for explaining the present invention, and do not limit the present invention. All modifications, alterations, and the like within the technical scope of the present invention are included in the present invention. It goes without saying that it is done.

1 is a schematic longitudinal sectional view of a ground heat exchanger showing a first embodiment of the present invention. It is a schematic longitudinal cross-sectional view of the removable anchor utilized in 1st Example. It is a schematic longitudinal cross-sectional view of the underground heat exchanger which shows 2nd Example of this invention. It is a schematic longitudinal cross-sectional view of the removable anchor utilized in 2nd Example. It is a schematic longitudinal cross-sectional view of the underground heat exchanger which shows 3rd Example of this invention.

Explanation of symbols

10 underground heat exchanger 14,114 tube (buried cladding)
16, 116 Removable anchor 18, 118 Tensile material 48 Permanent anchor 214 Tubing

Claims (4)

In the underground heat exchanger that uses a pipe embedded in the ground as a fluid circulation channel,
In a removable anchor using an unbonded tensile material, the residual cladding tube remaining in the ground after the removal of the tensile material is used as the above-mentioned tube body serving as a fluid circulation channel. vessel.   2. The underground according to claim 1, wherein the residual covering pipe in the removable anchor, which is folded back in a substantially U shape under a predetermined load bearing body, is used as the pipe body serving as a fluid circulation channel. Heat exchanger.   The two remaining cladding tubes that are substantially straight in the removable anchor, which are linearly assembled to a predetermined load-bearing body under a fixed holding of the tip by a predetermined tip holder. 2. The underground heat exchanger according to claim 1, wherein the underground heat exchanger can be used as the tubular body serving as a fluid circulation channel under internal communication by a predetermined hollow communication device installed between the tip holders. In the underground heat exchanger that uses a pipe embedded in the ground as a fluid circulation channel,
The pipe body which is folded back into a substantially U shape is assembled in advance to the permanent anchor uncurtain dong in advance, and this uncurtain dong is inserted into a predetermined anchor hole and fixed in the ground. An underground heat exchanger characterized in that the body is used as the above-mentioned tubular body that serves as a fluid circulation channel.

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