JP5930161B2 - Underground heat exchange equipment using ready-made piles - Google Patents

Description

  The present invention relates to an underground heat exchange device using a ready-made pile in which pipes are arranged along a ready-made pile embedded in a pile hole when heat exchange is performed using a temperature difference in the ground.

  Conventionally, many methods have been used to extract energy by burying ready-made piles along pipes in the ground, flowing solvent (liquid) into the pipes from the ground, exchanging heat with the relatively hot ground. It has been. For example, when using steel pipe materials such as steel pipe piles, the heat conduction is good, so the temperature of the ground outside the pile body is easily transmitted to the inside of the pile body, and more inner diameter can be taken than the outer diameter. (Patent Document 1).

  In concrete-made ready-made piles, the inner diameter is narrow and difficult to use, so they are often placed on the outer peripheral surface (Patent Documents 2 and 3). In this case, a structure has been proposed in which a pipe is arranged on the outer peripheral surface of a ready-made pile and fixed with a band from the outside of the pipe (Patent Document 2). In addition, using a ready-made pile having an enlarged diameter portion, the pipe is spirally wound from directly above the enlarged diameter portion located at the lower end portion, and a notch is formed in the enlarged diameter portion of the intermediate portion, A pipe was also passed through the notch (Patent Document 3).

JP 2004-233031 A JP2003-206528 Utility Model Registration No. 3163849

  In the structure in which the pipe is fixed with the band, the pipe may be damaged, and it cannot be applied to a soft material pipe. Moreover, since the ready-made pile to be used required the enlarged diameter part, it was not able to apply to the straight ready-made pile without an enlarged diameter part by an embedding method etc.

  Therefore, in this invention, since the lower end portion of the pipe is locked to the first fixing member that is wound around the outer peripheral surface of the ready-made pile, the pipe can be used regardless of the presence or absence of the enlarged-diameter portion, and the above problems have been solved. .

That is, this invention utilized a ready-made pile characterized by arranging a heat exchange pipe on the outer surface of a ready-made pile that is a concrete system and a connected pile embedded in a pile hole, and was configured as follows. It is a ground heat exchange device.
(1) The pipe is configured by connecting a plurality of pipe pieces arranged in the vertical direction , with both open ends positioned on the ground and an intermediate portion arranged along the outer surface of the ready-made pile . .
(2) in the ready-made pile, at a lower position than the lower end of the pipe, the first pipe fixing member mounted to regulate the movement relative to the outer surface of the prefabricated pile.
(3) the lower end of the pipe, the first pipe fixing member, mounted et been to restrict the increase of the pipe.
To (4) covers the lower end of the pipe position, the first pipe protecting cylinder is arranged, between the inner surface and the outer surface of the prefabricated pile of the first pipe protecting cylinder, pipe disposed voids are formed.
(5) An intervention material for maintaining a distance between the inner surface of the first pipe protection cylinder and the outer surface of the ready-made pile is inserted into the pipe arrangement space.
(6) The pipe is disposed so as not to contact the inner surface of the first pipe protection cylinder .

Moreover, in the above, it is an underground heat exchange apparatus using the ready-made pile of Claim 1 comprised as follows.
(1) The pipe was formed in a U-shape, and a fixing band for the first pipe fixing member was disposed below the folded lower end portion.
(2) in an outer surface of the prefabricated pile, above the height position of the first pipe fixing member, vignetting Installing a fixed band securing the pipe holders, and the second pipe fixing member.
(3) A second pipe protection cylinder is disposed on the outer periphery of the second pipe fixing member.

  In the above, when using the second fixing member, if at least one of the connected ready-made piles is provided, no load is applied to the folded portion, but one or more of each ready-made pile (single pile). It is desirable to provide it at a location.

  In the above description, a plurality of pipes formed in a substantially U shape are usually used. In this case, it is desirable that the pipes be arranged symmetrically in diameter. One pipe is also possible. In addition, the pipe is not limited to a substantially U shape, and if both open ends are located on the ground, the arrangement of the portion buried underground is arbitrary. Moreover, the property of the pipe 10 is arbitrary such as hard and flexible, and the material is arbitrary such as metal and resin.

  Attach the lower end of the pipe to the first pipe fixing member that regulates the rise of the pipe, place the first pipe protection cylinder, and place the pipe between the inner surface of the first pipe protection cylinder and the outer surface of the pre-made pile Since the gap is formed, the pipe can be reliably protected with a small amount of material, and the construction can be simplified. In addition, the first pipe fixing member may be provided at the lowest end, and the pipe can be held with a small amount of material, so that the exposed area of the pipe can be increased and the heat exchange efficiency can be increased.

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a front view, FIG. 1B is a partially enlarged view of part A, and FIG. 1C is an end view taken along line BB in FIG. FIGS. 2A and 2B are cross-sectional views illustrating the assembly procedure of the pipe fixing member. FIGS. 3A and 3B are front views of another embodiment of the present invention. 4 (a) and 4 (b) show another embodiment of the present invention, and FIG. 4 (c) is a partially enlarged view of a portion C in FIGS.

1. Ready-made pile 5 to use

The ready-made pile 5 to be used is, as a connected pile, the lowest-end ready-made pile 1 located in the consolidation portion 41 of the pile hole 40, the reference ready-made pile 2 connected on the lowest-end ready-made pile 1, and the reference ready-made pile if necessary. It consists of upper ready-made piles 3 and 3 connected on the pile 2.
In this embodiment, the lowermost ready-made pile 1, the reference ready-made pile 2, and the upper ready-made pile 3 are all straight (cylindrical) without protrusions.

2. Structure of pipe 10 for heat exchange

The straight pipe pieces 11, 11 arranged in the vertical direction are arranged in parallel. L-shaped joints 13 are respectively attached to both ends of a short pipe piece 12 in the lateral direction, and both joints 13 and 13 are connected to the lower ends of the pipe pieces 11 and 11, respectively. A U-shaped pipe (for heat exchange) 10 that is open to the outside is formed.
The lower end of the pipe pieces 11, 11, the joints 13, 13 and the pipe piece 12 form a folded portion 14. Note that the folded portion 14 can also be configured by bending a single pipe to form a substantially U-shape.
In this embodiment, with one ready-made pile 5, three pipes 10 and 10 are arranged and used at rotationally symmetric positions (FIG. 1 (c)).

3. Fixing members 20, 25, protective cylinder 30

A band-shaped fixed band 21 that can be in close contact with the outer peripheral surface in accordance with the outer periphery of the lower end portion of the reference ready-made pile 2, and a coupling tool that can lock one end to the fixed band 21 and the other end to the pipe piece 12 The first pipe fixing member 20 is composed of (for example, a wire) 22. The connecting member 22 is only required to restrict the rise of the pipe 10 with respect to at least the fixed band 21, but a material (for example, a metal plate or the like) that can restrict the movement of the pipe 22 downward or in the horizontal direction can also be used.
Further, a band-shaped fixed band 26 that can be in close contact with the outer peripheral surfaces of the reference ready-made pile 2 and the upper ready-made pile 3, and pipe holders 27 and 27 that can hold the pipe pieces 11 and 11 are provided on the surface of the fixed band 26. The second pipe fixing member 25 is configured.
The pipe holder 27 is composed of, for example, two hooks having inner surfaces of partial circles along the outer periphery of the pipe 10. Moreover, since the pipe 10 can be fixed to the reference ready-made pile 2 in advance with the second fixed member 25 used immediately above the first fixing member 20 in the reference ready-made pile 2, Also, it is possible to adopt a shape having an opening through which the pipe 10 passes (frame shape of glasses).
A protective cylinder 30 is formed from a short cylindrical member that is loosely arranged on the outer periphery of the reference ready-made pile 2 and the upper ready-made pile 3. A gap between the outer periphery of the reference ready-made pile 2 (upper ready-made pile 3) and the inner periphery of the protective cylinder 30 is formed at a distance L1 (FIGS. 1B and 1C), and is defined as a pipe arrangement gap 33. Positioned in the pipe arrangement gap 33, the protective cylinder fixing members 33 and 33 are installed to contact the inner surface of the pipe protective cylinder 30 and the outer peripheral surface of the reference prefabricated pile 2 (upper prefabricated pile 3) and maintain the distance L1. (FIG. 1 (c), FIG. 2 (c)).

4). Burial of ready-made piles 5 (configuration of underground heat exchange device 50)

(1) A fixed belt 21 at a lower end portion and a fixed band 26 with a pipe holder 27 are attached to the straight base pile 2 in advance slightly above the fixed belt 21 (FIG. 2A). Subsequently, the connecting portion 22 is attached to the fixing belt 21, the pipe 10 is placed along the outer periphery of the reference prefabricated pile 2, the folded portion 14 (pipe piece 12) of the pipe 10 is locked and fixed to the connecting portion 22, and the pipe 10 ( The pipe pieces 10 and 10) are locked to the pipe holder 27 (FIG. 2B).
Moreover, the protection cylinder 30 is covered with the reference | standard ready-made pile 2, and it arrange | positions in the position which covers the folding | returning part 14 (pipe piece 12). The protective cylinder fixing members 31 and 31 are inserted between the inner surface of the protective cylinder 30 and the outer peripheral surface of the reference ready-made pile 2, and the protective cylinder 30 is fixed to the reference ready-made pile 2 so as to maintain the pipe arrangement gap 33 at the interval L1. (FIG. 2C).
Moreover, another protective cylinder 30 is also put on the reference ready-made pile 2 and arranged at a position so as to cover the fixing band 26 and the pipe holder 27. Similarly, the protective cylinder 30 is attached to the inner surface of the protective cylinder 30 and the outer peripheral surface of the reference ready-made pile 2, and the protective cylinder 30 is attached to the reference ready-made pile 2 so as to maintain the pipe arrangement gap 33 at the interval L1. (Fig. 2 (c)).
In this case, it is desirable that the protective cylinder 30 is made of a hard material such as a steel pipe so that the pipe 10 in the arrangement gap 33 does not touch the inner surface of the protective cylinder 30.

(2) The upper ready-made pile 3 positioned above the reference ready-made pile 2 is previously attached with a fixing belt 26 to which pipe holders 27 and 27 are fixed on the outer peripheral surface. Pipe pieces 15 and 15 having substantially the same length as the length of the upper ready-made pile 3 are arranged along the axial direction on the outer peripheral surface of the upper ready-made pile 3 and locked to the pipe holders 27 and 27. In this state, the pipe pieces 15, 15 are free to move in the length direction, but are restricted from moving in other directions. Similarly, the upper ready-made pile 3 is arranged so as to cover the fixing band 26 and the pipe holder 27 through the protective cylinder 30, and the protective cylinder 30 is fixed to the upper ready-made pile 3 with the protective cylinder fixing members 31, 31. Thus, the protective cylinder 30 keeps its position.

(3) In the pile hole 40 excavated in advance, the lowermost ready-made pile 1 is attached to a pile driving machine (not shown) by a normal method, and the lower end ready-made pile 1 is grounded. The lowermost ready-made pile 1 is separated from the pile driving machine.
A standard ready-made pile 2 with pipe pieces 11, 11 etc. attached to the pile driving machine, the lower end of the standard ready-made pile 2 is connected to the upper end of the lowermost ready-made pile 1, and the lowermost ready-made pile 1 and The standard ready-made pile 2 is embedded in the pile hole 40 by a normal method. At this time, since the pipes 10 (pipe pieces 11, 11, 12) are held by the first and second pipe fixing members 20, 25 even when the connected ready-made piles 1, 2 are rotated, There is no hindrance to the construction, but care must be taken not to give excessive impact to the pipe pieces 11 and 12.

(4) Subsequently, at a predetermined position, the pile driving machine is stopped, the reference ready-made pile 2 is held near the opening of the pile hole 40, and the reference ready-made pile 2 is separated from the pile driving machine.

(5) Subsequently, the upper ready-made pile 3 to which the pipe pieces 15 and 15 are attached is attached to the pile driving machine, and the lower end of the upper ready-made pile 3 is connected to the upper end of the reference ready-made pile 2. At the same time, the upper ends of the pipe pieces 11, 11, 12 of the reference ready-made pile 2 are connected to the lower ends of the pipe pieces 15, 15 of the upper ready-made pile 3 (not shown).

(6) Subsequently, the holding of the reference ready-made pile 2 near the ground 51 is released, and the lowermost ready-made pile 1, the reference ready-made pile 2 and the upper ready-made pile 3 connected together are lowered simultaneously.

(7) When the connected ready-made pile 5 (bottom end ready-made pile 1, standard ready-made pile 2, upper ready-made pile 9) is buried to a predetermined depth, the upper end of the upper ready-made pile 3 is held near the opening of the pile hole, The upper ready-made pile 3 and the like are separated from the pile driving machine.
The other upper ready-made pile (new) 3 to which the pipe is attached is attached to the pile driving machine, and the lower end of the upper ready-made pile (new) 3 is connected to the upper end of the upper ready-made pile (existing) 3. At the same time, the lower ends of the pipe pieces 15, 15 of the upper ready-made pile (new) 3 are connected to the upper ends of the pipe pieces 15, 15 of the upper ready-made pile (existing) 3.

(8) Subsequently, the holding of the upper ready-made pile 3 is released, and the lowermost ready-made pile 1, the reference ready-made pile 2 and the upper ready-made pile 3, 3 are simultaneously lowered and held at a required depth.

(9) Hereinafter, the pile holes 40 are connected to the pipe pieces 15 and 15 while connecting the necessary number of the upper ready-made piles 3 and 3 and before the lowermost ready-made pile 1 is buried or after the ready-made pile 5 is buried. If the cement milk (including soil cement etc.) filled therein is solidified, the heat exchange device 50 of the present invention is configured (FIG. 1 (a)). In addition, the ready-made pile 5 is comprised from the connected lowermost ready-made pile 1, the reference | standard ready-made pile 2, and the upper ready-made pile 3,3.

5. Other embodiments

(1) In the above embodiment, when the upper ready-made pile 3 is connected to the upper side of the reference ready-made pile 2, the pipe pieces 15 and 15 are attached to the upper ready-made pile 3 in advance. A process can also be taken.
For example, the upper ready-made pile 3 is piled in a state where the fixing band 26 fixing the pipe holding jig 27 is attached to the upper ready-made pile 3 and the pipe protective cylinder 30 is passed (not fixed by the protective cylinder fixing material 31). It can also be attached to the machine and connected to the standard ready-made pile 2 (not shown). In this case, after connecting the reference ready-made pile 2 and the upper ready-made pile 3, pipe pieces 15 and 15 are attached to the upper ready-made pile 3 and connected to the pipe pieces 11 and 11 of the reference ready-made pile 2.

(2) In the above-described embodiment, the pipe pieces 15 and 15 are also connected every time the upper ready-made pile 3 is connected, but other processes may be employed .

(3) Moreover, in the said embodiment, although the pipe protection cylinder 30 was attached to the 2nd pipe fixing member 25 (fixing band 26 which fixed the pipe holding jig 27), the pipe protection cylinder 30 can also be abbreviate | omitted (FIG. Not shown). Furthermore, the second pipe fixing member 25 (the fixing band 26 to which the pipe holder 26 is fixed) itself can be omitted (not shown).

(4) Moreover, in the said embodiment, although the lowermost end ready-made pile 1 was made into straight shape, the lowermost end ready-made pile 1 (FIG. 3 (a)) which formed the cyclic | annular protrusion parts 7 and 7 over the full length, in the lower part It is also possible to use the lowermost ready-made pile 1 (FIG. 3B) in which only the annular projections 7 and 7 are formed.

(5) Moreover, in the said embodiment, although the 1st pipe fixing member 20 was attached as the reference | standard ready-made pile 2 directly above the lowest-end ready-made pile 1, it is attached to the upper end part (or intermediate part) of the lowest-end ready-made pile 1 The 1st pipe fixing member 20 can be attached and the folding | returning part 14 (lower end part) of the pipe 10 can also be fixed (FIG. 4). In this case, usually, the lower end of the lowermost ready-made pile 1 is arranged in the root consolidation part 41 (part where the solidification strength is increased) of the pile hole 40, so that the pipe 10 is in the root consolidation part 41 or directly above the root consolidation part. It is desirable not to be located.
Further, in this case, when the lowermost ready-made pile 1 (= reference ready-made pile 2) having the protruding portion 7 at the upper end portion is used, the fixing band 21 is fixed immediately below the uppermost protruding portion 7A, and a soft material is used. The connecting tool 22 is arranged along the outer surface of the protrusion 7A (FIG. 4C). Similarly, when the reference ready-made pile 2 is installed above the lowest-end ready-made pile 1 and the reference ready-made pile 2 has the protrusion 7 (not straight), the fixing band 21 and the connecting portion 22 are similarly provided. Arrange (not shown).

DESCRIPTION OF SYMBOLS 1 Bottom end ready-made pile 2 Reference | standard ready-made pile 3 Upper ready-made pile 5 Ready-made pile 7 Protrusion part 10 U-shaped pipe 11 Pipe piece (reference | standard ready-made pile. Vertical)
12 Pipe piece (standard ready-made pile, side)
13 Pipe piece joint 14 Pipe fold 15 Pipe piece (top ready-made pile)
20 First pipe fixing member 21 Fixing band (first pipe fixing member)
22 Connector (first pipe fixing member)
25 Second pipe fixing member 26 Fixing band (second pipe fixing member)
27 Pipe holder (second pipe fixing member)
30 Pipe Protection Cylinder 31 Protection Cylinder Fixing Member 33 Pipe Arrangement Gap 40 Pile Hole 41 Pile Hole Rooting Part 50 Heat Exchanger

Claims (2)

A ground-based heat exchange device using ready-made piles, which is constructed as follows by arranging pipes for heat exchange on the outer surface of ready-made piles that are concrete and connected piles embedded in pile holes .
(1) The pipe is configured by connecting a plurality of pipe pieces arranged in the vertical direction , with both open ends positioned on the ground and an intermediate portion arranged along the outer surface of the ready-made pile . .
(2) in the ready-made pile, at a lower position than the lower end of the pipe, the first pipe fixing member mounted to regulate the movement relative to the outer surface of the prefabricated pile.
(3) the lower end of the pipe, the first pipe fixing member, mounted et been to restrict the increase of the pipe.
To (4) covers the lower end of the pipe position, the first pipe protecting cylinder is arranged, between the inner surface and the outer surface of the prefabricated pile of the first pipe protecting cylinder, pipe disposed voids are formed.
(5) An intervention material for maintaining a distance between the inner surface of the first pipe protection cylinder and the outer surface of the ready-made pile is inserted into the pipe arrangement space.
(6) The pipe is disposed so as not to contact the inner surface of the first pipe protection cylinder . The underground heat exchange apparatus using the ready-made pile of Claim 1 comprised as follows.
(1) The pipe was formed in a U-shape, and a fixing band for the first pipe fixing member was disposed below the folded lower end portion.
(2) in an outer surface of the prefabricated pile, above the height position of the first pipe fixing member, vignetting Installing a fixed band securing the pipe holders, and the second pipe fixing member.
(3) A second pipe protection cylinder is disposed on the outer periphery of the second pipe fixing member.

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