JP2015102293A - Erecting device for pipe member and erecting method for pipe member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to fit a tube member.SOLUTION: There is provided an erecting device for tube member that erects a tube member associated with an underground heat exchanger in an excavation hole formed in the foundation. The erecting device for tube member includes: a frame; a rotary shaft part provided on the frame rotatably in a vertical direction; a plurality of rod bodies provided to spread radially from the rotary shaft part; and a plurality of support members which are provided for the plurality of rod bodies respectively, the support members each having a projection part projecting in an L shape from a side part of a rod body toward the tip so that a tube member wound into a coil is mounted and supported on the projection part. The support members are provided slidably in axial directions of corresponding rod bodies.

Description

  The present invention relates to a pipe member erection device and a pipe member erection method according to an underground heat exchanger.

  A geothermal heat utilization system that heats and cools buildings using geothermal heat with small year-round temperature fluctuations is attracting attention. In this geothermal heat utilization system, a geothermal heat exchanger is installed in the ground to collect and radiate heat with the ground. The underground heat exchanger, for example, radiates heat to the ground in summer and collects heat from the ground in winter by passing water through a pipe member (for example, a tube).

  As an erection device for embedding (inserting) such a pipe member into a borehole, a pipe member wound in a coil shape is attached to a reel member, and the reel member is rotated vertically to make a pipe. One that feeds out a member and sends it to a drilling hole is known (see, for example, Patent Document 1).

JP 2011-149663 A

  However, in the built-in device that performs the vertical rotation as described above, a portion that suppresses the tube member wound in a coil shape from spreading in the lateral direction (horizontal direction) is necessary. For this reason, there has been a problem that it takes time to attach the tube member wound in a coil shape. For example, the erection device disclosed in Patent Document 1 includes a rear outer ring G2 and a front outer ring G1 on the side of the tube member mounting position. And when attaching the pipe member wound by the coil shape, the rear outer ring | wheel G2 (or front outer ring | wheel G1) is removed, and the coil-shaped pipe member is inserted in the bar | burr B. Thereafter, the rear outer ring G2 (or the front outer ring G1) is attached to the original state. As described above, it takes time to install the pipe member.

  This invention is made | formed in view of this subject, The main objective is to attain simplification of the attachment of a pipe member.

In order to achieve such an object, the pipe member erection device of the present invention includes:
A pipe member erection device for erection of a pipe member related to an underground heat exchanger in an excavation hole formed in the ground,
A frame,
A rotating shaft provided on the gantry so as to be vertically rotatable;
A plurality of rods provided so as to spread radially from the rotating shaft portion;
A plurality of support members respectively provided on the plurality of rods, each having a protruding portion that protrudes in an L shape from the side to the tip of the rod, and is wound in a coil shape A plurality of support members for mounting and supporting the tube member on the protruding portion;
With
Each of the plurality of support members is provided so as to be slidable along the axial direction of the corresponding rod body.
According to such a pipe member erection device, it is possible to simplify the attachment of the pipe member in a coiled state.

In this pipe member erection device, it is preferable that each of the plurality of support members is provided to be rotatable about the axis of the corresponding rod body.
According to such a tube member erection device, it is possible to securely hold the coil member in accordance with the width (lateral width) of the coiled tube member. Thereby, it can prevent that a pipe member disperses.

In this pipe member erection device, the plurality of support members include at least a distance between tips of the projecting portions opposed to each other with the rotary shaft portion interposed therebetween in the coil shape. It is desirable to be able to slide to a position smaller than the inner diameter.
According to such a pipe member erection device, since the projecting portion does not get in the way when the coiled tube member is attached, the attachment of the coiled tube member can be simplified.

In order to achieve such an object, the pipe member embedding method of the present invention is provided with a gantry, a rotating shaft portion provided on the gantry so as to be vertically rotatable, and radially extending from the rotating shaft portion. A plurality of support members each having a plurality of rods and a plurality of support members respectively provided on the plurality of rods, the protrusions projecting in an L shape from the side of the rod toward the tip. And a method of building a pipe member for building a plurality of pipe members related to the underground heat exchanger in an excavation hole formed in the ground using a building device comprising:
Each of the plurality of support members is slid along the axial direction of the corresponding rod body, so that the tube member wound in a coil shape is placed on each protrusion of the plurality of support members. A supporting process;
Feeding the pipe member out to the excavation hole by rotating the rotary shaft vertically;
It is characterized by having.

  According to the present invention, it is possible to simplify the attachment of the pipe member.

It is explanatory drawing of the underground heat utilization system 11 using the underground heat exchanger 21 which concerns on this embodiment. 2A is a side view of the underground heat exchanger 21 seen through the hole 23 of the ground G, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. 2A. 3A is a schematic view when the flow path connection portion 36 is viewed from above, FIG. 3B is a schematic view when the flow path connection portion 36 is viewed from the side, and FIG. 3C is a flow path connection portion. It is the schematic when 36 is seen from the bottom. 4A to 4C are explanatory diagrams of the construction procedure of the installation work of the underground heat exchanger 21. FIG. 5A and 5B are schematic views showing the reel device 70 of the present embodiment. 6A and 6B are schematic views showing a state in which the coiled single tube 35r is attached to FIGS. 5A and 5B, respectively. 7 is a schematic perspective view of the reel device 70 in the vicinity of a rotation support shaft 72d. FIG. It is a schematic perspective view of the pipe | tube holding | maintenance part 74c. 9A to 9C are conceptual diagrams for explaining attachment of the coiled single tube 35r. It is explanatory drawing about adjustment of the inclination with respect to the rod 74b of the pipe | tube holding | maintenance part 74c. It is explanatory drawing about the operation | movement which pays out the single pipe | tube 35 from the reel apparatus 70. FIG.

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

<<< About underground heat exchanger >>>
FIG. 1 is an explanatory diagram of a ground heat utilization system 11 using a ground heat exchanger 21 according to the present embodiment. 2A is a side view of the underground heat exchanger 21 seen through the hole 23 of the ground G, and FIG. 2B is a cross-sectional view taken along line BB in FIG. 2A. 3A to 3C are schematic views of the flow path connecting portion 36, FIG. 3A is a view when the flow path connecting portion 36 is viewed from above, and FIG. 3B is a view of the flow path connecting portion 36 from the side. FIG. 3C is a view when the flow path connection portion 36 is viewed from below. In FIG. 2A, the flow path connecting portion 36 specifically shown in FIGS. 3A to 3C is schematically shown.

  The ground heat utilization system 11 is for heating the building 1 by using heat from the ground heat exchanger 21 that performs heat exchange with the ground G and the heat medium 26 of the ground heat exchanger 21. A heat pump 15 that generates hot water and cold water for cooling, and a circulation pump 17. In addition, since the structure of the heat pump 15 is known, the description is abbreviate | omitted.

  As shown in FIGS. 2A and 2B, the underground heat exchanger 21 is a so-called “borehole system”. That is, the underground heat exchanger 21 has a heat collecting / discharging pipe 31 inserted into a hole 23 (corresponding to an excavation hole) formed vertically in the ground G. The space SP23 is filled with a filler 27.

Hereinafter, the configuration of the underground heat exchanger 21 will be described in detail.
The hole 23 is a hole excavated almost perpendicularly to the ground G by an excavator such as a boring machine or an auger, and has a diameter of 100 to 200 mm and a depth of 30 to 150 m.

  The heat-dissipating tube 31 has three or more (four in this embodiment) single tubes 35 (35a, 35b, 35b, 35b) whose tube axis direction is along the vertical direction, and these single tubes 35a, 35b. , 35b, 35b are connected to each other by a flow path connecting portion 36 connected to each lower end portion. Each single pipe 35 corresponds to a pipe member. Then, the heat medium 26 is fed from the heat pump 15 into at least one of the single tubes 35a, 35b, 35b, and 35b (one in the present embodiment). The single pipe 35a functions as a single pipe for the outward path that sends the heat medium 26 into the ground. On the other hand, the remaining single pipes 35b (in the present embodiment, the remaining three single pipes 35b, 35b, and 35b) are for the return path that sends the heat medium 26 that has been sent underground to the ground and returns it to the heat pump 15. It functions as a single tube. That is, in the single tube 35a, the heat medium 26 flows downward, and in the single tube 35b, the heat medium 26 flows upward, and the flowing directions are opposite to each other. The single pipe 35a and the single pipe 35b are members having the same configuration made of, for example, high-density polyethylene. Therefore, in the following description, the single pipe 35a and the single pipe 35b may be simply referred to as a single pipe 35 without being distinguished.

  As a result, the heat medium 26 sent from the heat pump 15 to the heat-radiating / radiating pipe 31 is sequentially transferred in the order of the single pipe 35 for the forward path (single pipe 35a) and each single pipe 35 for the backward path (single pipe 35b). The heat medium 26 is heated or cooled by the underground heat of the ground G while flowing through the single tubes 35a and 35b. And after this heat exchange, it sends out toward the heat pump 15 with the pressure of the circulation pump 17, and uses for hot water production | generation or cold water production | generation in the heat pump 15. FIG.

  Further, as shown in FIG. 2B, the underground heat exchanger 21 is provided with a spacer 40 that holds the four single tubes 35 (35a, 35b, 35b, 35b) on the circumference of the virtual circle C1. Yes. The spacer 40 is made of resin such as high-density polyethylene and has a hollow cylindrical shape (however, due to the presence of a support portion 42 described later, it is not a complete cylindrical shape as shown in FIG. 2B). ing.

  The spacer 40 includes three or more (four in this embodiment) support portions 42 that support each of the four single tubes 35 (35a, 35b, 35b, 35b). The four support portions 42 are arranged at an equal pitch along the circumference of the virtual circle C1 in order to correspond to the four single tubes 35 (35a, 35b, 35b, 35b). Each of the four single tubes 35 (35a, 35b, 35b, 35b) is held on the circumference of the virtual circle C1. Each support portion 42 supports the single tubes 35a, 35b, 35b, 35b by fitting the single tubes 35a, 35b, 35b, 35b to the support portion 42. Therefore, the support part 42 has the same shape as the single tubes 35a, 35b, 35b, 35b, that is, a hollow cylindrical shape equal to or less than that of the single tubes 35a, 35b, 35b, 35b, and moves up and down due to the tightening effect. It is preventing.

  However, the support part 42 is not a perfect cylindrical shape, and the support part 42 has a part cut out (hereinafter referred to as a notch part P). The notch P is located on the outside of the virtual circle C1 in the radial direction, and serves as a fitting opening when each single pipe 35 (35a, 35b, 35b, 35b) is fitted into the support 42. As described above, the support portion 42 is located on the radially inner side of the virtual circle C1 with respect to each single pipe 35 (35a, 35b, 35b, 35b), and thereby each single pipe 35 (35a, 35b, 35b, 35b). ) From the inside. This restricts the movement of each single pipe 35 inward in the radial direction.

  Moreover, the two adjacent support parts 42 are connected by each of the four connection parts 44, as shown to FIG. 2B. The above-described (not complete) cylindrical shape of the spacer 40 is formed by the four support portions 42 and the four connecting portions 44 that are alternately arranged. Then, the hole portion H (that is, the cylindrical hollow portion) is provided on the radially inner side of the four support portions 42 and the four connecting portions 44.

  The flow path connecting portion 36 is located below the four single pipes 35 (35a, 35b, 35b, 35b), and connects the flow paths of the four single pipes 35. The flow path connection portion 36 is located at the deepest portion of the fistula 23. The flow path connecting portion 36 includes a main body portion 37 and four tubular projecting portions 38 projecting upward from the main body portion 37 in a tubular shape.

  Each of the four tubular protrusions 38 is fusion-bonded to the lower end of each of the four single tubes 35 (35a, 35b, 35b, 35b). Since each of the four tubular protrusions 38 is a hollow cylindrical member like each of the four single tubes 35 (35a, 35b, 35b, 35b), Is formed with a flow path. Therefore, the flow paths of the four single tubes 35 (35a, 35b, 35b, 35b) are connected to the flow paths of the four tubular projecting portions 38 by the fusion connection.

  Further, inside the main body portion 37, as the flow paths, the four upper chambers 37a connected to the respective flow paths of the tubular projecting portions 38 and the four upper chambers 37a merge to form a lower chamber. 37b (common chamber) is formed.

  Then, the heat medium 26 flowing downward through the flow path of the forward pipe 32 flows into the flow path of the (one) tubular protrusion 38 that is fusion-connected to the forward pipe 32, and then the flow of the tubular protrusion 38. It moves to the (one) upper chamber 37a connected to the road. And the heat medium 26 which moved to the said upper chamber 37a flows in into the lower chamber 37b which is a common chamber after that. Then, the heat medium 26 that has flowed into the lower chamber 37b passes through the other three upper chambers 37a and the other three tubular projecting portions 38 by pressure (hydraulic pressure), and thus three single tubes for the return path. It will flow through 35b, 35b, 35b.

  The filler 27 is made of, for example, mortar, river sand, mountain sand, silica sand, or the like as a base material, and is densely filled into the space SP23 between the single pipe 35 and the fistula 23. Thereby, heat exchange is performed between the heat medium 26 in the single pipe 35 and the ground G through the filler 27. In order to increase the heat exchange efficiency, silicon carbide, alumina, and blast furnace with a volume content of 1 to 20% with respect to the filler 27 (= total volume of long particles / total volume of the filler 27). You may mix the long grain thing which consists of at least any 1 type of slag.

<<<< About the installation work of the underground heat exchanger >>>>
4A to 4C are explanatory diagrams of the construction procedure of the installation work of the underground heat exchanger 21. FIG. In addition, in FIG. 4A-FIG. 4C, the state seen from the longitudinal cross-section is shown. In addition, illustration of the flow-path connection part 36 and the spacer 40 is abbreviate | omitted in the same figure.

  First, the single pipe 35 (single pipes 35a, 35b, 35b, and 35b), the flow path connecting portion 36, and the spacer 40 are manufactured at the factory. Then, a reel device 70 (corresponding to an erection device) to be described later, each single pipe 35, one flow path connection portion 36, and a plurality of spacers 40 are transported to the planned installation site. Each single pipe 35 is carried in the field in a coiled state. In the following description, the single tube 35 wound in a coil shape is also referred to as a coiled single tube 35r. Further, as will be described later, two single tubes 35 can be attached to the reel device 70 of the present embodiment. In this embodiment, since four single tubes 35 are built in the fist hole 23, two reel devices 70 are prepared.

  In the planned installation site, as shown in FIG. 4A, a predetermined portion of the target ground G is excavated at the same time as or in parallel with the above-described manufacturing in the factory, and finally the hole diameter is 100 to 200 mm and the depth is 30. The ~ 23 m fistula 23 is formed. This excavation is performed by an excavator such as a boring machine or an auger. For the purpose of hole wall protection and drilling itself, a casing steel pipe 24 matching the size of the borehole 23 is inserted into the borehole 23 simultaneously with or immediately after the excavation. The casing steel pipe 24 may be omitted.

  Next, the two reel devices 70 are arranged at the planned installation site, and four single tubes 35 (35a, 35b, 35b, 35b) are placed in the hole 23 formed vertically in the ground G. The tube axis direction is inserted along the vertical direction. At this time, first, two coiled single tubes 35 r are attached to each reel device 70. Then, the two reel devices 70 are installed at symmetrical positions with respect to the hole 23. The configuration of the reel device 70 will be described later.

  Next, the four single tubes 35 are slightly fed out from the two reel devices 70, respectively, and the tips of the four single tubes 35 are fused and connected to the flow path connecting portion 36.

  Then, as shown in FIG. 4B, the four single tubes 35 are fed out from the reel device 70 and inserted into the slot 23 with the flow path connection portion 36 at the head.

  The spacer 40 is attached to each single pipe 35 every time each single pipe 35 is fed by about 1 meter. That is, by repeating the step of attaching the spacer 40 and the step of inserting the single pipe 35 by about 1 meter, the spacers 40 are installed at intervals of about 1 meter in the vertical direction.

  Then, after each single tube 35 is built to the target build-in depth (FIG. 4C), each single tube 35 is then cut to be separated from each reel device 70.

  Thereafter, the upper end of the single pipe 35 is covered with a protective cap (not shown), the casing steel pipe 24 is pulled out, the filler 27 is put in the bore 23, and each single pipe 35 (35a, 35b, 35b, 35b) is buried, Thereby, the installation work of the underground heat exchanger 21 is completed.

<<< About reel device >>>
5A and 5B are schematic views showing an example of the reel device 70 of the present embodiment. 5A is a side view and FIG. 5B is a front view. 6A and 6B are schematic views showing a state where the coiled single tube 35r is attached to FIGS. 5A and 5B, respectively. FIG. 7 is a schematic perspective view of the vicinity of the rotation support shaft 72d of the reel device 70, and FIG. 8 is a schematic perspective view of the tube holding portion 74c.

  The reel device 70 according to the present embodiment includes a gantry 72 placed on the ground G, and a reel member 74 provided on the gantry 72 so as to be vertically rotatable. Further, in the reel device 70 of the present embodiment, as shown in FIGS. 5B and 6B, two reel members 74 are provided for one pedestal 72.

The gantry 72 includes a lower frame 72a, a support frame 72b, an auxiliary frame 72c, and a rotation support shaft 72d.
The lower frame 72 a is a frame member provided at the lower part of the gantry 72. The shape on the installation surface (horizontal plane) of the lower frame 72a of this embodiment is a rectangle.
The support frame 72b is erected upward in the vertical direction near the middle point in the long side direction at both ends in the short side direction of the lower frame 72a. That is, two support frames 72b are provided.
The auxiliary frame 72c is provided obliquely between the end of the long side of the lower frame 72a and the support frame 72b.
The rotation support shaft 72d is a columnar bar member provided in the horizontal direction between the two support frames 72b (in other words, the axial direction intersects the vertical direction). In the present embodiment, two reel members 74 are rotatably provided on the rotation support shaft 72d.

  The reel member 74 has a core shaft portion 74a (corresponding to a rotating shaft portion), a rod body 74b, and a tube holding portion 74c. Further, two reel members 74 are provided so as to be symmetric with respect to the axial direction of the rotation support shaft 72d (symmetrical in FIGS. 5B and 6B). In other words, the positional relationship between the rod 74b of the two reel members 74 and the tube holding portion 74c (that is, the coiled single tube 35r) is reversed in the axial direction of the rotation support shaft 72d. Thereby, the single tube 35 can be easily fed out from each coiled single tube 35r. Since the two reel members 74 have the same configuration, only one of them will be described.

  The core shaft portion 74a is provided so as to surround the periphery of the rotation support shaft 72d as shown in FIG. As a result, the core shaft portion 74a is vertically rotatable around the rotation support shaft 72d.

The rod bodies 74b are rod-shaped steel members provided on the core shaft portion 74a, and in this embodiment, four rod bodies 74 are provided so as to spread radially from the core shaft portion 74a (at intervals of 90 degrees). Note that the number of the rods 74b is not limited to four and may be plural. For example, there may be three or five.
The tube holding portion 74c is for holding the single tube 35 (coiled single tube 35r) in a coiled state, and is provided on the distal end side of each rod 74b. The tube holding portion 74c has a support member 74d and a spread preventing rod 74e.
The support member 74d is a portion for mounting and supporting the coiled single tube 35r, and includes a pipe portion 74da and a protruding portion 74db.
The pipe portion 74da is provided in a cylindrical shape so as to surround the rod body 74b along the rod body 74b.
The protruding portion 74db is provided on the pipe portion 74da so as to protrude in an L shape from the side portion of the rod 74b (pipe portion 74da) toward the distal end side. Of the L-shaped projecting portion 74db, the distal portion (the portion along the direction intersecting the axial direction of the rod 74b) is for mounting and supporting the coiled single tube 35r. The tip side portion (portion substantially parallel to the axial direction of the rod 74b) is for suppressing the spread of the coiled single tube 35r (bundle of single tubes 35) in the horizontal direction (horizontal direction). .

  The spread preventing rod 74e is disposed on the distal end side (outside) of the pipe portion 74da of the support member 74d in the rod body 74b. The spread preventing rod 74e extends from the rod 74b in a direction intersecting the axial direction of the rod 74b. The spread preventing rod 74e suppresses the outward spread of the coiled single tube 35r (each single tube 35) and, when the reel member 74 is positioned below in the vertical direction, the single tube 35 is caused by its own weight. Prevents falling (dropping).

Further, the spread preventing rod 74e includes a rigid part 74ea and a flexible part 74eb.
The rigid portion 74ea is a rod-shaped member made of the same material as the rod 74b, for example.
The flexible portion 74eb is formed of an elastic body (rubber or the like), and is provided at the tip of the spread preventing rod 74e with respect to the rigid body portion 74ea. In the present embodiment, a rubber tube is used as the flexible portion 74eb. The flexible portion 74eb is deformed (elastically deformed) when a stress of a predetermined value or more is applied, and returns to its original shape when the stress is released.

  As shown in FIG. 8, a closed space is formed by the spread prevention rod 74e, the pipe portion 74da (rod body 74b), and the protruding portion 74db. By disposing the coiled single tube 35r in this closed space, the coiled single tube 35r is held by the tube holding portion 74c.

  As shown in FIG. 8, the support member 74d and the spread preventing rod 74e are fixed to the rod body 74b by screws 77 and 78, respectively.

  Note that the support member 74d (pipe portion 74da, projecting portion 74db) of the present embodiment can be slid in the axial direction of the rod 74b (sliding direction in FIG. 8) by loosening the screw 77. Further, by loosening the screw 77, the support member 74d can rotate in the rotation direction (clockwise and counterclockwise) around the axis P of the rod 74b.

  Further, the spread preventing rod 74e (rigid portion 74ea, flexible portion 74eb) of the present embodiment is rotated about the axis P of the rod 74b (clockwise and counterclockwise) by loosening the screw 78. It can be rotated.

<<< Installation of coiled single tube >>>
9A to 9C are conceptual diagrams for explaining attachment of the coiled single tube 35r. Although only one rod 74b is shown here for convenience of explanation, the same processing is performed on each rod 74b.

  First, in the state of FIG. 9A, the screw 77 of the support member 74d of each rod 74b is loosened. Then, as shown in FIG. 9B, each support member 74d is slid inward (core shaft portion 74a side). Thereafter, the coiled single tube 35r is disposed. At this time, since the support member 74d is slid toward the core shaft portion 74a, the support member 74d (more specifically, the protruding portion 74db) does not get in the way, and the coiled single tube 35r can be arranged easily. When the distance between the tips of the two opposing support members 74d (more specifically, the protruding portion 74db) is slid until the inner diameter of the coiled single tube 35r becomes smaller, the coiled single tube 35r is attached. Since the protrusion 74db does not get in the way, the coiled single tube 35r can be attached more easily.

  Next, as shown in FIG. 9C, the support member 74d is slid to the opposite side (the tip side of the rod 74b) to return to the original position, and the screw 77 is tightened. As a result, the coiled single tube 35r is held in a closed space formed by the support member 74d and the spread prevention rod 74e.

  Further, as described above, since the support member 74d and the spread preventing rod 74e can be rotated clockwise and counterclockwise about the axis P of the rod 74b, respectively, the axis P of the rod 74b is the center. The tilt around the axis can be adjusted.

  FIG. 10 is an explanatory diagram for adjusting the inclination of the tube holding portion 74c. FIG. 10 shows a state seen from the extension of the axis P of the rod 74b. The solid line indicates the shape before the inclination adjustment of the tube holding portion 74c, and the broken line indicates the shape after the inclination adjustment of the tube holding portion 74c.

  In the solid line in the figure (before adjustment), when the size of the closed space is considerably larger than the size of the bundle of the coiled single tubes 35r, or the size of the bundle of the coiled single tubes 35r is increased by extending the single tube 35. When it becomes small, the coiled single tube 35r cannot be clamped, and each single tube 35 is easily separated.

  Therefore, when the inclination of the tube holding portion 74c (support member 74d, spread prevention rod 74e) is adjusted as indicated by the broken line in the figure, the coiled single tube 35r can be securely held by the rod body 74b and the tube holding portion 74c. It can correspond to the width (lateral width) of the coiled single tube 35r. Therefore, it can suppress that each single pipe 35 of the coil-shaped single pipe 35 spreads within the closed space.

<<< Operation of reel device >>>
FIG. 11A to FIG. 11D are explanatory diagrams for the operation of drawing out the single tube 35 from the reel device 70.

  First, as shown in FIG. 11A, when the tip of the single tube 35 is pulled from the coiled single tube 35r attached to the reel device 70, the coiled single tube 35r rotates and the reel member 74 of the reel device 70 also rotates. It rotates in the same direction around the support shaft 72d. In response to this rotation, in the tube holding portion 74c close to the feeding position, the single tube 35 receiving the tensile force comes into contact with the spread preventing rod 74e.

  Thereafter, the single pipe 35 is continuously pulled, and the single pipe 35 is moved toward the flexible portion 74eb of the spreading prevention rod 74e as shown in FIG. 11B. When the single tube 35 receiving the tensile force reaches the flexible portion 74eb, the single tube 35 deforms (elastically deforms) the flexible portion 74eb as shown in FIG. 11C. Thereby, as shown to FIG. 11D, the single pipe | tube 35 is taken out outside. Further, the flexible portion 74eb returns to the original shape and prevents the other single tube 35 from being taken out. The flexible portion 74eb is deformed only when it comes into contact with the single tube 35 that has received a tensile force. For example, the flexible portion 74eb does not deform even when it comes into contact with the single tube 35 that has received gravity. . Thereby, the spread prevention rod 74e can surely prevent the single tube 35 of the coiled single tube 35r from spreading or dropping (falling).

  After that, when the single pipe 35 is continuously pulled, the coiled single pipe 35r and the reel member 74 are further rotated, and the single pipe 35 taken out from the spread preventing rod 74e is spread (on the downstream side in the rotation direction). It contacts the prevention rod 74e. The same operation is performed here.

  Similarly, by continuously pulling the single tube 35, the single tube 35 is sequentially fed out from the reel device 70 sequentially. In the present embodiment, the reel member 74 provided on the rotation support shaft 72d has a different direction (symmetric with respect to the axial direction), but the feeding direction of the single tube 35 at the time of installation is the same. Thereby, since the winding rod of the single pipe 35 is prepared at the time of building, the building work becomes easier.

  When adjusting the inclination of the tube holding portion 74c described above, the flexible portion 74eb of the spread preventing rod 74e provided on the rod body 74b rather than the rod body 74b with respect to the rotation direction of the reel member 74. Is preferably downstream. In this way, when the single tube 35 is drawn out, the single tube 35 can be guided to the flexible portion 74eb side along the spread preventing rod 74e, and is difficult to move to the opposite side (the rod 74b side). Therefore, the single pipe 35 can be taken out more reliably.

<<< Reel Device Arrangement >>>
As a reel device, for example, a type of reel device is known in which the coiled single tube 35r is attached to the reel device so as to be suspended just above the hole 23, and the coiled single tube 35r is rotated to feed out the single tube 35. However, since the position above the excavation hole is a position where it is actually built, it is a place where various operations such as monitoring of the built-in state are likely to occur (that is, a place where workers frequently visit). For this reason, it is not preferable from the viewpoint of work safety if the reel device is hung and arranged almost directly above the excavation hole as described above.

  Since the reel device 70 of the present embodiment is disposed on the ground G (more specifically, on the ground G on the side of the hole 23), it is safer than the above-described hanging type. Can increase the sex.

  In this case, a place for placing the erection device is required around the hole 23. In particular, in this embodiment, as shown in FIG. 2B, four single pipes 35 are built in one fistula 23.

  Here, if there is only one coiled single tube 35r that can be attached to each reel device 70, four reel devices 70 are required, and four reel devices 70 are arranged on the side of the hole 23. There must be. For example, four reel devices 70 must be arranged radially around the hole 23, or two reel devices 70 must be arranged in parallel on both sides of the hole 23. In either case, a large space for placing the erection device is required around the hole 23.

  On the other hand, in the reel device 70 of this embodiment, two reel members 74 are provided, and a coiled single tube 35r (one single tube 35 wound in a coil shape) can be attached to each. it can. That is, two coiled single tubes 35 can be attached to one reel device 70, and two single tubes 35 can be fed out from the reel device 70. As a result, even when four single tubes 35 are installed, two (a pair) of reel devices 70 may be disposed on the ground G on both sides sandwiching the fistula 23. Therefore, the installation space can be reduced. Further, the two reel members 74 are rotatable around the rotation support shaft 72d, and the two single tubes 35 can be fed out from the one reel device 70 in the same direction. Since the single pipe 35 is fed out in the same direction, when the single pipe 35 is installed in the hole 23, the winding rods of the single pipe 35 are aligned. Thereby, it can be made hard to receive the influence of a curl. Therefore, it is easy to build the single pipe 35 in the hole 23.

  As described above, the reel device 70 according to the present embodiment includes the gantry 72, the core shaft portion 74a provided on the gantry 72 so as to be vertically rotatable, and the plurality of reel devices 70 provided so as to spread radially from the core shaft portion 74a. And a plurality of support members 74d provided on each of the plurality of rod bodies 74b, each having a projecting portion 74db projecting in an L shape from the side portion of the rod body 74b toward the tip, And a plurality of support members 74d for placing and supporting the single tube 35r on the protrusion 74db. Each of the plurality of support members 74d is provided to be slidable along the axial direction of the corresponding rod 74b.

  Accordingly, since the support member 74d (more specifically, the protruding portion 74db) does not get in the way when the coiled single tube 35r is attached, it is possible to simplify the attachment of the coiled single tube 35r.

=== Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

<Reel device>
In the reel device 70 of the above-described embodiment, the two reel members 74 are provided on the rotation support shaft 72d, but the present invention is not limited to this. For example, the number of reel members 74 may be one, or three or more. In the case of a plurality, it is desirable that each reel member 74 can be rotated independently of each other. Thereby, since the feed amount of each single pipe 35 can be adjusted, it is possible to cope with a case where the single pipes 35 fed out from the reel members 74 move apart and are not aligned. Therefore, the installation work can be made easier.
Moreover, although the reel device 70 of the above-described embodiment is disposed on the ground G on the side of the hole 23, the present invention is not limited to this. For example, it may be of a type that is suspended just above the hole 23.
Further, the configurations of the pedestal 72 and the reel member 74 of the reel device 70 are not limited to those described above. For example, the spread preventing rod 74e may not be provided. In addition, the inclination of the tube holding portion 74c (the support member 74d and the spread preventing rod 74e) with respect to the axis P of the rod 74b may be fixed (it may not be configured to be rotatable).
Moreover, although the flexible part 74eb of the reel device 70 described above is a rubber tube, it is not limited thereto. For example, a rod-shaped spring may be used.
Alternatively, the rotation support shaft 72d and the core shaft portion 74a may be integrally formed so that both rotate vertically while being supported by the support frame 72b.

<Reel device layout>
In the above-described embodiment, the reel device 70 is disposed on the ground G on both sides sandwiching the fistula 23. However, the present invention is not limited to this. For example, one may be arranged on one side (one side) of the fistula 23. Also in this case, for example, the installation space can be reduced as compared with the case where two erection devices for feeding out one single pipe 35 are arranged.

<About single pipe>
In the above-described embodiment, the four single tubes 35 are built in the fistula 23, but the present invention is not limited to this. For example, three may be sufficient and five or more may be sufficient. Further, in the above-described embodiment, there is one outgoing single pipe 35 (35a) and three backward single pipes 35 (35b), but the present invention is not limited to this. For example, there may be two outgoing pipes 35 (35a) and two backward pipes 35 (35b).

<About fistula>
As long as the hole 23 is formed by excavating the ground G in the vertical direction, the structure and the formation method are not limited to the above-described embodiment.

1 building, 11 geothermal heat utilization system, 15 heat pump,
17 circulation pump, 21 underground heat exchanger,
23 fistula, 24 casing steel pipe,
26 heating medium, 27 filler,
31 heat extraction pipe, 35 single pipe, 35a single pipe (for forward path),
35b single pipe (for return path), 35r coiled single pipe,
36 channel connection part, 37 body part,
37a upper chamber, 37b lower chamber, 38 tubular projection,
40 spacer, 42 support part, 44 joint part,
70 reel device, 72 frame,
72a lower frame, 72b support frame,
72c auxiliary frame, 72d rotating support shaft,
74 Reel member, 74a Core shaft part, 74b Rod body 74c Tube holding part, 74d Support member,
74 da pipe part, 74 db projecting part 74 e spreading prevention rod, 74 ea rigid body part,
74eb flexible part,
77 screws, 78 screws SP23 space, G ground (ground)

Claims (4)

A pipe member erection device for erection of a pipe member related to an underground heat exchanger in an excavation hole formed in the ground,
A frame,
A rotating shaft provided on the gantry so as to be vertically rotatable;
A plurality of rods provided so as to spread radially from the rotating shaft portion;
A plurality of support members respectively provided on the plurality of rods, each having a protruding portion that protrudes in an L shape from the side to the tip of the rod, and is wound in a coil shape A plurality of support members for mounting and supporting the tube member on the protruding portion;
With
Each of the plurality of support members is provided so as to be slidable along the axial direction of the corresponding rod.
Built-in device characterized by that. The built-in device according to claim 1,
Each of the plurality of support members is provided to be rotatable around the axis of the corresponding rod body.
Built-in device characterized by that. The built-in device according to claim 1 or 2,
The plurality of support members are slidable at least to a position where the distance between the tips of the projecting portions facing each other across the rotating shaft portion is smaller than the inner diameter of the tube member wound in the coil shape. is there,
Built-in device characterized by that. A gantry, a rotating shaft portion provided on the gantry so as to be vertically rotatable, a plurality of rod bodies provided so as to spread radially from the rotating shaft portion, and a plurality of supports provided respectively on the plurality of rod bodies A plurality of supporting members having protrusions protruding in an L-shape from the side portions of the rod body toward the tip thereof, and a plurality of the underground heat exchangers using the building device A pipe member erection method for embedding a pipe member in an excavation hole formed in the ground,
Each of the plurality of support members is slid along the axial direction of the corresponding rod body, so that the tube member wound in a coil shape is placed on each protrusion of the plurality of support members. A supporting process;
Feeding the pipe member out to the excavation hole by rotating the rotary shaft vertically;
A method for installing a pipe member, comprising: