JP2017026167A - Heat exchanger device using precast pile and precast pile with heat exchanging pipes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate a connecting work for precast pile*heat exchanging pipes without any possibility of damaging heat exchanging pipes at the time of their burying work.SOLUTION: A first heat exchanging pipe 10 and a linear second heat exchanging pipe 20 are installed within an intermediate precast pile 30 in such a way that linear pipe pieces 11 to 13 are bent to be included within them. A first A connecting port 1a is formed at an opening of one end 31 of the first heat exchanging pipe 10 and a first B connecting port 1b is formed at the other end 32. A second A connecting port 2a is arranged at one end 31 of the second heat exchanging pipe 20 and a second B connecting port 2b is formed at the other end 32. A third heat exchanging pipe 40 is arranged within the lower-most precast pile 50. Upside-down intermediate precast pile 30B is connected on the lower-most precast pile 50 and an intermediate precast pile 30A is connected on it and each of the pipes is connected to each other. The first A connecting port 1a and the second A connecting port 2a of the uppermost intermediate precast pile 30 are connected to fluid circulation*heat recovery means to form a heat exchanging device.SELECTED DRAWING: Figure 1

Description

  The present invention embeds a ready-made pile in which a heat exchange pipe is arranged underground, and a heat exchange device using a ready-made pile that recovers underground heat to the ground via a fluid flowing in the heat exchange pipe. The present invention relates to a ready-made pile with a heat exchange pipe that is optimal for a heat exchange device.

Various devices have been proposed in which a heat exchange pipe is submerged in a pile hole and buried in a deep position in the ground to recover the heat in the ground. In this case, the heat exchange pipe is generally made of resin, and it has been difficult to sink to a deep position due to buoyancy. Therefore, it has also been proposed to embed a heat exchange pipe together with the ready-made pile by attaching a heat exchange pipe to the ready-made pile.
When using ready-made piles, the length of the ready-made piles is generally about 10m, and in order to recover heat from a deeper position in the ground, bury several minor ready-made piles in a deeper position. (Patent Document 1). At this time, it was necessary to connect the ready-made piles positioned up and down by a normal method and also connect the heat exchange pipe itself up and down. Moreover, in order to protect the heat exchange pipe from being damaged when buried, the heat exchange pipe was accommodated in the hollow portion of the ready-made pile.
On the other hand, in order to collect more heat in the ground, the heat exchange pipe is made longer on the outer circumference of the steel pipe in order to secure a surface area for heat exchange by increasing the length of the heat exchange pipe compared to the buried depth. A proposal for winding a pipe has also been made (Patent Document 2).

JP, 2014-129706, A JP 2005-188866 A

  In order to protect the heat exchange pipe, in the type in which the heat exchange pipe is accommodated in the hollow portion of the pre-made pile, the heat exchange pipe is accommodated in the hollow portion of the pre-made pile in a spirally wound state, and the heat exchange pipe is It was difficult to maintain in position. In this case, it is conceivable to use a large number of special spacers, but since the middle part of the hollow pile is several meters from the upper and lower ends, it is difficult to assemble the heat exchange pipe formed in a spiral shape. Further, in the type in which the heat exchange pipe is exposed and arranged in a spiral shape, the resistance generated in the heat exchange pipe at the time of embedding is large, and there is a risk of breakage.

  Since the present invention uses the first heat exchange pipe that is bent and bent so as to have the linear portion in the axial direction and the second heat exchange pipe that is linear, it accommodates a longer heat exchange pipe in the ready-made pile. In addition, workability was also ensured during construction when connecting and burying ready-made piles.

That is, the present invention provides a ready-made pile comprising a plurality of intermediate ready-made piles accommodating heat exchange pipes, the heat exchange pipe being connected and the intermediate ready-made piles being configured as follows. This is the heat exchange device used.
(1) The intermediate ready-made pile is constructed as follows.
(a) In the hollow portion of a hollow ready-made pile, the first upper pipe connection port and the second upper pipe connection port are formed on the upper end surface, and the first lower pipe connection port and the second B pipe connection port are formed on the lower end surface. Form.
(b) A first heat exchange pipe that is bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and an upper end of the first heat exchange pipe is disposed on the first upper side. The lower end of the first heat exchange pipe is connected to the pipe connection port to the first lower pipe connection port, respectively.
(c) A substantially straight second heat exchange pipe is disposed in the hollow portion of the ready-made pile, and the upper end of the second heat exchange pipe is connected to the second upper pipe connection port, and the second heat exchange pipe is The lower ends were connected to the second lower pipe connection port, respectively.
(e) The second B of another ready-made pile is formed so that the first B-pipe connection port of another ready-made pile is located immediately above the first upper-pipe connection port. It was formed so that the pipe connection port was located.
(2) The first B pipe connection port of the lowermost intermediate ready-made pile is connected to the second B pipe connection port by a third heat exchange pipe.
(3) The first upper pipe connection port and the second upper pipe connection port of the intermediate ready-made pile at the uppermost end are connected to a fluid circulation / heat recovery means installed on the ground.

Moreover, in the said, it is the heat exchange apparatus using the ready-made pile characterized by being comprised as follows.
(1) A ready-made pile is constructed by connecting one or more intermediate ready-made piles above one lower-end ready-made pile.
(2) The lower end ready-made pile is constructed as follows.
(a) The first upper pipe connection port and the second upper pipe connection port are formed in the upper end surface in the hollow part of the hollow ready-made pile.
(b) A third heat exchange pipe bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and both end openings of the third heat exchange pipe are formed in the first upper pipe. A connection port was connected to the second upper pipe connection port.

Moreover, another invention is a ready-made pile with a heat exchange pipe in which the heat exchange pipe is installed in the ready-made pile base, which is configured as follows.
(1) The heat exchange pipe is composed of a first heat exchange pipe and a second heat exchange pipe.
(2) Inside the hollow part of the hollow ready-made pile, the first A pipe connection port and the second A pipe connection port are formed on the A end surface at both end faces A and B in the length direction, and the first B pipe is formed on the B end surface. A connection port and a 2B pipe connection port are formed.
(3) A first heat exchange pipe bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and one end of the first heat exchange pipe is connected to the first A pipe. The other end of the first heat exchange pipe is connected to the first B pipe connection port.
(4) A second heat exchange pipe on a substantially straight line is disposed in the hollow portion of the ready-made pile, and one end of the second heat exchange pipe is connected to the second A pipe connection port, in addition to the second heat exchange pipe. The end was connected to the second lower pipe connection port.
(5) The first A pipe connection port and the first A pipe connection port of another ready-made pile connected to the ready-made pile can be connected, and the second B pipe connection port and other connected to the ready-made pile The second B pipe connection port of the ready-made pile can be connected.

Moreover, in the said, it is the ready-made pile with a heat exchange pipe characterized by being comprised as follows.
(1) The first heat exchange pipe is straight in the axial direction connected to the first A pipe coupling port in the axial direction, and straight in the axial direction connected to the first pipe piece via a U-shaped bent portion. Second pipe piece, and a third pipe piece that is connected to the second pipe piece via a U-shaped bent portion and connected to the first B pipe connection port in the axial direction. .
(2) The second pipe piece is composed of a single pipe piece or a plurality of pipe pieces which are linearly connected in the axial direction and have a U-shaped bent portion.

Moreover, in the said, it is the ready-made pile with a heat exchange pipe characterized by being comprised as follows.
(1) The first heat exchange pipe has a straight first pipe piece connected to the first A pipe connection port, and a straight second pipe piece connected to the first pipe piece via a U-shaped bent portion. And a third pipe piece connected to the second pipe piece via a U-shaped bent portion and connected to the first B pipe connection port.
(2) The second pipe piece is composed of one or a plurality of bent and connected U-shaped bent portions.

Moreover, in the said, it is the ready-made pile with a heat exchange pipe characterized by being comprised as follows.
(1) With other ready-made piles connected to the ready-made piles, at each connection end face,
On the substantially vertical line of the first A pipe connection port of the ready-made pile, the first A pipe connection port of the other ready-made pile is disposed, and on the substantially vertical line of the 1B pipe connection port of the ready-made pile, the other The first A pipe connection port of the ready-made pile is disposed, and the second A pipe connection port of the other ready-made pile is disposed substantially on the vertical line of the second A pipe connection port of the ready-made pile, and On the substantially vertical line of the second B pipe connection port, the second A pipe connection port of the other ready-made pile is disposed,
It was configured as follows.

  Moreover, although the ready-made pile in the above points out the ready-made pile made from concrete mainly, what is called a concrete pile which coat | covered the outer periphery with the steel pipe is also contained. Moreover, if it is a structure which has a hollow part, the ready-made pile of other materials, such as a steel pipe pile, is also possible.

  In the present invention, the first heat exchange pipe is bent to increase the length (heat exchange surface area), and the second heat exchange pipe is made linear. The connection work at the time of burying ready-made piles was made easy.

In an embodiment of the present invention, (a) is a longitudinal sectional view showing the configuration of a ready-made pile, (b) is a plan view of the intermediate ready-made pile 30A, (c) is an AA end view, and (d) is an intermediate pile 30B. (E) is a BB end view, and (f) is a plan view of the lowermost ready-made pile 50. In another embodiment of the present invention, (a) is a longitudinal sectional view showing another configuration of the intermediate ready-made pile. In another embodiment of the present invention, (a) represents a front view of an intermediate ready-made pile, and (b) represents a state in which a heat exchange pipe to be used is developed. In another embodiment of the present invention, (a) is an enlarged plan view of an intermediate ready-made pile, (b) is an enlarged vertical cross-sectional view of the intermediate ready-made pile, (c) is an enlarged CC cross-sectional view, and (d) is an enlarged cross-sectional view. An enlarged DD sectional view is shown. The figure of the state which expand | deployed the heat exchange pipe to be used in the same another embodiment of this invention is represented.

  Embodiments of the present invention will be described with reference to the drawings.

1. Configuration of intermediate ready-made pile 30

(1) The ready-made pile base body 30a used for this invention is a product made from hollow concrete, and is similar to a normal ready-made pile in one end (upper end. A end) 31 and the other end (upper end. B end) 32 in the axial direction. A connection end plate (not shown) is attached to each.

(2) The first heat exchange pipe 10 for heat exchange used in the present invention is formed by bending at a required length. That is, the first pipe piece 11, the second pipe piece 12, and the third pipe piece 13 that are linear according to the length (vertical direction) of the ready-made pile are arranged in parallel, and the lower end of the first pipe piece and the second pipe A first U-shaped bent portion 51 is formed between the lower end of the piece, and a second U-shaped bent portion 52 is formed between the upper end of the second pipe piece 12 and the upper end of the third pipe piece 13. To do.
The second heat exchange pipe 20 is composed of a straight pipe piece 21.

(3) As the pipe pieces 11 to 13 and 21 for heat exchange (including the U-shaped bent portions 51, 52 and 53), for example, Neuac Sumikyo Co., Ltd. “U-Poly Pi” series is used.

(4) The first heat exchange pipe 10 and the second heat exchange pipe 20 are accommodated in the hollow portion of the ready-made pile base 30a, and various holders are used at the upper end of the hollow portion at the upper end of the first heat exchange pipe 10. The upper end opening of the first pipe piece 11 is defined as a first A pipe connection port (first upper pipe connection port) 1a. Further, the lower end of the third pipe piece 13 is held at the lower end portion of the hollow portion so as to maintain its position by using various holders (not shown), and the lower end opening of the third pipe piece 13 is set to 1B. The pipe connection port (first lower pipe connection port) 1b. In addition, holding | maintenance of the upper end part of the 1st pipe piece 11 and the lower end part of the 3rd pipe piece 13 is hold | maintained only by any one, and the other holding | maintenance is also omissible. When both the upper end portion of the first pipe piece 11 and the lower end portion of the third pipe piece 13 are held, the upper end of the first pipe piece 11 is gently held on either side. It is also possible to make the lower end of the portion or the third pipe piece 13 slightly movable in the length direction of the ready-made pile base 30a.

(5) Moreover, the upper and lower sides of the pipe piece 21 of the 2nd heat exchange pipe 20 are also maintained in the hollow part of the ready-made pile base | substrate 30a using various holding tools (not shown) in an upper end part and a lower end part. The upper end opening of the pipe piece 21 is the second A pipe connection port (second upper pipe connection port) 2a, and the lower end opening of the pipe piece 21 is the second B pipe connection port (second lower pipe connection port) 2b. And
In addition, holding | maintenance of the upper end part and lower end part of the 2nd heat exchange pipe 20 can also be hold | maintained only by any one, and the other holding | maintenance is also omissible. The “upper end portion” and / or “lower end portion” of the second heat exchange pipe 20 can be held gently so that the second heat exchange pipe 20 can move slightly in the length direction.

(6) In the above, the 1st heat exchange pipe 10 and the 2nd heat exchange pipe 20 are 1A pipe connection port 1a, 1B pipe connection port 1b, 2A pipe connection port 2a, 2B pipe connection port 2b, It is hold | maintained so that it may become the distance L1 from the inner wall 30b of the ready-made pile base 30a. Moreover, the 1st pipe 10 and the 2nd pipe 20 are hold | maintained in the state which does not contact the inner wall 30b of the ready-made pile base | substrate 30a, and the 1st heat exchange pipe 10 and the 2nd heat exchange pipe 20. It is desirable.

(7) Here, the arrangement of the first A pipe connection port 1a and the second A pipe connection port 2a at one end (upper end) 31 of the intermediate ready-made pile 30 is an A pattern, and the other end (lower end). The arrangement of 32 first B pipe connection ports 1b and 2B pipe connection ports 2b is a B pattern (FIG. 1).

(8) Moreover, the operation | work which installs the heat exchange pipes 10 and 20 in the ready-made pile base | substrate 30a, and comprises the intermediate ready-made pile 30,
-Install the heat exchange pipes 10 and 20 on the intermediate ready-made pile 30 at the factory and transport them to the site.
-Prior to lifting the intermediate ready-made pile 30 at the construction site, the heat exchange pipes 10 and 20 are installed in the intermediate ready-made pile 30.
・ After lifting the intermediate ready-made pile at the construction site, install it on the ready-made pile.
The procedure is arbitrary.

2. Configuration of the lowest end ready-made pile 50

(1) The ready-made pile base 50a similar to the intermediate ready-made pile 30 is used. That is, it is made of hollow concrete, and end plates (not shown) for connection are attached to both ends (upper and lower ends) 48 and 49 in the same manner as ordinary ready-made piles.

(2) As with the first heat exchange pipe 10, the third heat exchange pipe 40 used for the lower end ready-made pile 50 is formed by bending one pipe. That is, the first pipe piece 41, the second pipe piece 42, the third pipe piece 43, and the fourth pipe piece 44, which are linear according to the length (vertical direction) of the ready-made pile base 50a, are arranged in parallel. A first U-shaped bent portion 61 is formed at the lower end of the piece 41 and the second pipe piece 41, and a second U-shaped bent portion 62 is formed at the upper end of the second pipe piece 42 and the upper end of the third pipe piece 43. Then, a third U-shaped bent portion 63 is formed at the lower end of the third pipe piece 43 and the lower end of the fourth pipe piece 44, and is configured. The installation work of the 3rd heat exchange pipe 40 to each pipe piece 41-44, the U-shaped bending parts 61-63, and the ready-made pile base | substrate 50a is the same as that of the case of the intermediate ready-made pile 30.

(3) The 3rd heat exchange pipe 40 is accommodated in the hollow part of the ready-made pile base | substrate 50a, the upper end opening of the 1st pipe piece 41 is made into 1A pipe connection port 1a, and the upper end opening of the 4th pipe piece 44 is 2A. Let it be the pipe connection port 2a. Here, the first A pipe connection port 1a and the second A pipe connection port 2a are arranged as the A pattern pipe connection ports.
The third heat exchange pipe 47 is held on the inner wall 50b of the ready-made pile base 50a at at least one place. In this case, the upper end opening (first A pipe connection port 1a) of the first pipe piece 41 and the upper end opening (second A pipe connection port) of the fourth pipe piece 41 are in a state where they do not contact the inner wall 50b of the ready-made pile base 50a. It is desirable to hold 2a) so that it can move up and down somewhat.

(4) In the above, the first heat exchange pipe 10, the second heat exchange pipe 20, and the third heat exchange pipe 40 are the first A pipe connection port 1a, the second B pipe connection port 1b, the second A pipe connection port 2a, The 2B pipe connection port 2b is held at a distance L1 from the inner walls 30b, 50b of the ready-made pile bases 30a, 50a (FIGS. 1B and 1C).

3. Configuration of heat exchange device (embedding of ready-made piles 30, 50)

(1) In this embodiment, three ready-made piles are connected,
Top: Intermediate ready-made pile 30 in the forward position (30A), Upper surface: A pattern, Lower surface: B pattern Middle: Intermediate ready-made pile 30 positioned upside down (30B), Upper surface: B pattern, Lower surface: A pattern Bottom: Lowermost ready-made pile 50 Upper surface: Pipe connection port is A pattern (FIG. 1). In addition, it matches with the pattern of the pipe connection port of the upper surface of the lowermost ready-made pile 50 here, the lower surface of the intermediate ready-made pile 30B just above it is set, and also the pipe connection port pattern of the upper surface of the intermediate ready-made pile 30B is set. Even if the number of intermediate ready-made piles is increased and the number of intermediate ready-made piles is increased, the connecting surfaces are matched in order from the bottom, so that the configuration can be easily connected. .

(2) A predetermined pile hole is excavated with the excavation rod, and the excavation rod is pulled up to the ground.

(3) The ready-made pile 50 at the lowermost end is attached to a normal pile driving machine and lowered into the pile hole.

(4) Since the lowermost ready-made pile 50 is once held near the ground, the intermediate ready-made pile 30B is attached to the pile driving machine, and the connecting surfaces of both piles 50 and 30B are A patterns, so the lowermost end The first A pipe connection port 1a and the second A pipe connection port 2a on the lower surface of the intermediate ready-made pile 30B are respectively positioned immediately above the first A pipe connection port 1a and the second A pipe connection port 2a on the upper surface of the ready-made pile 50 (FIG. 1). (E) (f)).
Accordingly, the first A pipe connection port 1a on the lower surface of the intermediate ready-made pile 30B is joined to the first A pipe connection port 1a on the upper surface of the lowermost ready-made pile 50B, and the second A pipe connection port 2a on the lower surface of the intermediate ready-made pile 30B. And the second A pipe connection port 2a on the upper surface of the lowermost ready-made pile 50, and further using a normal joining method (such as a jig such as welding or a band), the upper surface of the lowermost ready-made pile 50 and the intermediate ready-made pile The lower surface of the pile 30B is joined.

(5) Subsequently, the connected lowermost ready-made pile 50 and intermediate ready-made pile 30B are lowered and lowered to a predetermined depth.

(6) Similarly, the intermediate ready-made pile 30B and the lowermost ready-made pile 50 are temporarily held on the ground, and the intermediate ready-made pile 30A is attached to the pile driving machine. Since the connection surfaces of the intermediate ready-made pile 30A and the intermediate ready-made pile 30B are B patterns, the intermediate ready-made pile 30A is directly above the first B pipe connection port 1b and the second B pipe connection port 2b on the upper surface of the intermediate ready made pile 30B. The first B pipe connection port 1b and the second B pipe connection port 2b on the lower surface are positioned (FIGS. 1C and 1D).
Accordingly, the first B pipe connection port 1b on the lower surface of the intermediate ready-made pile 30A is joined to the first B pipe connection port 1a on the upper surface of the intermediate ready-made pile 30B, and the second B pipe connection port 2b on the lower surface of the intermediate ready-made pile 30A The 2nd B pipe connection port 2b of the upper surface of intermediate ready-made pile 30B is connected, and the upper surface of intermediate ready-made pile 30B and the lower surface of intermediate ready-made pile 30A are further joined using a usual joining method.

(7) Subsequently, the lowermost ready-made pile 50 and the intermediate ready-made piles 30B, 30A connected are lowered and held at a predetermined depth. Since the pile hole is usually filled with excavated mud, the outer periphery and hollow portions of the lowermost ready-made pile 50 and the intermediate ready-made piles 30B and 30A are filled with excavated mud.
In addition, when supporting a ground structure using ready-made pile 30A, 30B, 50, it can also be solidified by filling the inside of a pile hole with cement milk, soil cement, etc. instead of mud.

(8) On the ground, pipes from the heat exchange device are connected to the first A pipe connection port 1a and the second A pipe connection port 2a on the upper surface of the intermediate ready-made pile 30A, respectively, and the heat exchange pipes 10, 20, and 40 are A liquid that is a similar refrigerant is flowed to exchange heat with underground heat, and the underground heat is taken out to the ground.
At this time, only the first heat exchange pipe 10 is bent and folded, and the second heat exchange pipe 20 is linear, so that the heat exchange efficiency can be improved. In particular, when the second heat exchange pipe 20 is used as a return pipe, an effect of reducing the loss in the middle and taking out underground heat to the ground is expected.
Moreover, since the 2nd heat exchange pipe 20 was made into linear form, when many intermediate ready-made piles 30 are used, a connection operation | work becomes very easy.

4). Other configurations of heat exchanger

(1) In the above embodiment, is used, but instead of the lowermost ready-made pile 50, the first A pipe connecting port 1a and the second A pipe connecting port 2a on the lower surface of the intermediate ready-made pile 30B are replaced by one connecting pipe 47. Can also be linked (FIG. 2). The connecting pipe 47 forms a lateral base that connects the first A pipe connecting port 1a and the second A pipe connecting port 2a, bends both ends of the base upward, and the first A pipe connecting port 1a and the second A pipe connecting port. 2a can be connected. Therefore, in this case, the connection pipe 47 corresponds to the third heat exchange pipe, and the heat exchange device can be configured with only the intermediate ready-made piles 30A and 30B without using the lowest-end ready-made pile 50.

(2) Moreover, in the said embodiment, if the 1st heat exchange pipe 10 is formed so that the 1st A pipe connection port 1a may be located in one surface of the ready-made pile base | substrate 30a, and the 1st B pipe connection port 1b may be located in the other surface. In addition, the number of times of folding and a folding structure such as a spiral shape are arbitrary. For example, seven pipe pieces 11 to 17 can be used (FIGS. 3B and 5).
That is, in the case where the surface area of the first heat exchange pipe 10 is increased, the seven pipe pieces 11 to 17 are arranged in parallel, and similarly, as in the case of the three pieces,
A first U-shaped bent portion 51 at the lower end of the first pipe piece 11 and the lower end of the second pipe piece 12;
A second U-shaped bent portion 52 at the upper end of the second pipe piece 12 and the upper end of the third pipe piece 13;
A third U-shaped bent portion 53 at the lower end of the third pipe piece 13 and the lower end of the fourth pipe piece 14;
A fourth U-shaped bent portion 54 at the upper end of the fourth pipe piece 14 and the upper end of the fifth pipe piece 15;
A fifth U-shaped bent portion 55 at the lower end of the fifth pipe piece 15 and the lower end of the sixth pipe piece 16;
A sixth U-shaped bent portion 56 at the upper end of the sixth pipe piece 16 and the upper end of the seventh pipe piece 13;
Each is formed and the 1st heat exchange pipe 10 is comprised (FIG.3 (b)).

(3) Moreover, in the said embodiment, the circumference | surroundings or inner side of the vertical reinforcing bars 71 and 71 arrange | positioned cyclically | annularly can be shape-retained by the cyclic | annular reinforcing bars 72 and 72, and the reinforcing bar cage-like pipe holder 70 can also be comprised ( 3 and 4). In this case, seven pipe pieces 11 to 17 (including the U-shaped bent portions 51 to 56) used in the first heat exchange pipe 10 and one pipe piece 21 of the second heat exchange pipe 20 are matched to the number. 8 vertical reinforcing bars 71, 71 are used (FIGS. 4A, 4C, and 4D).
The first heat exchange pipe 10 thus formed is rounded into a cylindrical shape, inserted into the pipe holder 70, and the pipe pieces 11 to 17 and 21 are placed along the eight vertical reinforcing bars 71 and 71. Are connected (FIGS. 4A to 4D). In this case, the operation of arranging the heat exchange pipes 10 and 20 in the ready-made pile base 30a is facilitated, and the heat exchange pipes 10 and 20 are kept in a predetermined position in the ready-made pile base 30a at the time of construction and will not be displaced. .
When the length of the first heat exchange pipe is increased (the surface area is increased), the number of pipe pieces is increased in the same manner. Similarly, the pipe holder 70 can also be used for the heat exchange pipe 40 of the lowermost ready-made pile 50 (not shown).

(4) Moreover, in the said embodiment, when the ready-made piles 30 and 50 were embed | buried, the heat exchange pipes 10 and 20 followed the embedding direction like the pipe pieces 11-17, 21 (of the ready-made piles 30 and 50). There is no resistance in the portion (along the axial direction), and it is possible to prevent accidental breakage, but since there is some resistance in the bent portions 51 to 57, there is a U-shaped protective pipe on the outer periphery of each bent portion 51 to 57 74, 74 can also be fitted (FIG. 5). Therefore, in this case, since the bent portion where the resistance at the time of embedding acts is reinforced, a pipe having relatively low rigidity (strength) can also be used. For example, the pipe pieces 11 to 17 and 21 Since the wall thickness can be reduced, the heat exchange efficiency can also be increased.
Further, in this case, when the heat exchange pipe 10 is bent, protective pipes 74 and 74 made of metal such as steel (metal pipe) are arranged at positions where the bent portions 51 to 57 are formed on the outer periphery of the long pipe material. Then, the pipe material is bent together with the protective pipe 74, and the U-shaped protective pipes 74, 74 are simultaneously formed on the outer periphery of the U-shaped bent portions 51-57. Therefore, manufacture of the heat exchange pipe 10 can be made easy and handling can also be made easy.
In addition, the heat exchange pipe 40 used for the lowermost ready-made pile 50 can similarly apply the protective pipe 74 (not shown).

(5) Moreover, in the said embodiment, although the 1st heat exchange pipe 10 bent one pipe and formed the bending parts 51-56 etc., such as the pipe pieces 11-16, the structure is arbitrary. . For example, the pipe pieces 11 to 16 can be cut in advance to a desired length, and the pipe pieces 11 to 16 can be connected by U-shaped joints corresponding to the bent portions 51 to 56 (illustration is shown). Not) In particular, when pipe materials (quasi-rigid heat exchange pipes) with a material having a larger "outer shape when spirally wound" than the "inner diameter of ready-made piles to be used" are used, bent portions 51 to 56 are formed. This is effective in this case.
Similarly, in the third heat exchange pipe 40, the pipe pieces 41 to 44 are cut in advance to a desired length, and U-shaped joints corresponding to the bent portions 61 to 63 are used to connect each pipe piece. It is also possible to connect 41 to pipe pieces 44 and the like (not shown).

1a 1A pipe connection port (first upper pipe connection port)
1b 1B pipe connection port (1st lower pipe connection port)
2a 2A pipe connection port (2nd upper pipe connection port)
2b 2B pipe connection port (2nd lower pipe connection port)
10 1st heat exchange pipes 11-17 1st pipe piece-7th pipe piece (1st heat exchange pipe. A linear part of an axial direction)
20 Second heat exchange pipe 21 Pipe piece (second heat exchange pipe)
30, 30A, 30B Intermediate ready-made pile 30a Ready-made pile base (intermediate ready-made pile)
30b Inner wall 31 of ready-made pile base Upper end (one end) of intermediate ready-made pile
32 Lower end (other end) of intermediate ready-made pile
40 3rd heat exchange pipe 41-44 Pipe piece (3rd heat exchange pipe. A linear part of an axial direction)
47 Connection pipe (third heat exchange pipe)
48 The upper end (one end) of the lowermost ready-made pile
49 Uppermost end of the lowermost ready-made pile (the other end)
50 Lowermost ready-made pile 50a Ready-made pile base (lowermost ready-made pile)
51-57 1st U-shaped connection part-7th U-shaped connection part (1st heat exchange pipe)
61-63 1st U-shaped connection part-3rd U-shaped connection part (3rd heat exchange pipe)
70 Pipe holder 71 Vertical rebar (pipe holder)
72 Ring rebar (pipe holder)

Claims (6)

A plurality of intermediate ready-made piles that house heat exchange pipes, and the heat exchange pipes are connected to the intermediate ready-made piles, and the heat exchange device using the ready-made piles is configured as follows. .
(1) The intermediate ready-made pile is constructed as follows.
(a) In the hollow portion of a hollow ready-made pile, the first upper pipe connection port and the second upper pipe connection port are formed on the upper end surface, and the first lower pipe connection port and the second B pipe connection port are formed on the lower end surface. Form.
(b) A first heat exchange pipe that is bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and an upper end of the first heat exchange pipe is disposed on the first upper side. The lower end of the first heat exchange pipe is connected to the pipe connection port to the first lower pipe connection port, respectively.
(c) A substantially straight second heat exchange pipe is disposed in the hollow portion of the ready-made pile, and the upper end of the second heat exchange pipe is connected to the second upper pipe connection port, and the second heat exchange pipe is The lower ends were connected to the second lower pipe connection port, respectively.
(e) The second B of another ready-made pile is formed so that the first B-pipe connection port of another ready-made pile is located immediately above the first upper-pipe connection port. It was formed so that the pipe connection port was located.
(2) The first B pipe connection port of the lowermost intermediate ready-made pile is connected to the second B pipe connection port by a third heat exchange pipe.
(3) The first upper pipe connection port and the second upper pipe connection port of the intermediate ready-made pile at the uppermost end are connected to a fluid circulation / heat recovery means installed on the ground.
The heat exchange apparatus using the ready-made pile according to claim 1, wherein the heat exchange apparatus is configured as follows.
(1) A ready-made pile is constructed by connecting one or more intermediate ready-made piles above one lower-end ready-made pile.
(2) The lower end ready-made pile is constructed as follows.
(a) The first upper pipe connection port and the second upper pipe connection port are formed in the upper end surface in the hollow part of the hollow ready-made pile.
(b) A third heat exchange pipe bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and both end openings of the third heat exchange pipe are formed in the first upper pipe. A connection port was connected to the second upper pipe connection port. A pre-made pile with a heat exchange pipe, wherein the pre-made pile has a heat exchange pipe installed in the pre-made pile base, and is configured as follows.
(1) The heat exchange pipe is composed of a first heat exchange pipe and a second heat exchange pipe.
(2) Inside the hollow part of the hollow ready-made pile, the first A pipe connection port and the second A pipe connection port are formed on the A end surface at both end faces A and B in the length direction, and the first B pipe is formed on the B end surface. A connection port and a 2B pipe connection port are formed.
(3) A first heat exchange pipe bent and formed so as to have an axial linear portion is disposed in the hollow portion of the ready-made pile, and one end of the first heat exchange pipe is connected to the first A pipe. The other end of the first heat exchange pipe is connected to the first B pipe connection port.
(4) A second heat exchange pipe on a substantially straight line is disposed in the hollow portion of the ready-made pile, and one end of the second heat exchange pipe is connected to the second A pipe connection port, in addition to the second heat exchange pipe. The end was connected to the second lower pipe connection port.
(5) The first A pipe connection port and the first A pipe connection port of another ready-made pile connected to the ready-made pile can be connected, and the second B pipe connection port and other connected to the ready-made pile The second B pipe connection port of the ready-made pile can be connected. The ready-made pile with a heat exchange pipe according to claim 3, which is configured as follows.
(1) The first heat exchange pipe is straight in the axial direction connected to the first A pipe coupling port in the axial direction, and straight in the axial direction connected to the first pipe piece via a U-shaped bent portion. Second pipe piece, and a third pipe piece that is connected to the second pipe piece via a U-shaped bent portion and connected to the first B pipe connection port in the axial direction. .
(2) The second pipe piece is composed of a single pipe piece or a plurality of pipe pieces which are linearly connected in the axial direction and have a U-shaped bent portion. The ready-made pile with a heat exchange pipe according to claim 3, which is configured as follows.
(1) The first heat exchange pipe has a straight first pipe piece connected to the first A pipe connection port, and a straight second pipe piece connected to the first pipe piece via a U-shaped bent portion. And a third pipe piece connected to the second pipe piece via a U-shaped bent portion and connected to the first B pipe connection port.
(2) The second pipe piece is composed of one or a plurality of bent and connected U-shaped bent portions. The ready-made pile with a heat exchange pipe according to claim 3, which is configured as follows.
(1) With other ready-made piles connected to the ready-made piles, at each connection end face,
The first A pipe connection port of the other ready-made pile is disposed on the substantially vertical line of the first A pipe connection port of the ready-made pile, and the other vertical line is substantially vertical of the first B pipe connection port of the ready-made pile. The first A pipe connection port of the ready-made pile is disposed, and the second A pipe connection port of the other ready-made pile is disposed substantially on the vertical line of the second A pipe connection port of the ready-made pile, and On the substantially vertical line of the second B pipe connection port, the second A pipe connection port of the other ready-made pile is disposed,
It was configured as follows.

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