JP2003035455A - Installation structure of underground longitudinal tube for geothermal air-conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation structure for embedding an underground longitudinal tube for geothermal air-conditioning deeply in the ground while preventing cost increase in the embedding work of the tube. SOLUTION: The underground longitudinal tube 1 for geothermal air- conditioning has a steel outer pipe 2 which is driven longitudinally into the ground 13 by rotary pressure driving method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation structure of a vertically buried underground tube for air conditioning using geothermal heat.

[0002]

2. Description of the Related Art A geothermal utilization tube consisting of a double pipe is buried vertically in an underground area where a stable temperature is maintained throughout the year without being influenced by the outside air, and the outside air is passed through this tube to the underground. An air conditioning system using geothermal heat is provided that allows heat to be exchanged with heat to be sent indoors to keep the indoor space cool in summer and warm in winter.

In this air conditioning system, the tube burying work has conventionally been carried out by digging a vertical hole in the ground, inserting the tube in the vertical hole, and backfilling the soil.

[0004]

However, in order to effectively and effectively use the geothermal heat for air conditioning, the tube must be embedded as deep as possible in the ground. The method has a problem that the cost of the embedding work becomes very high.

The present invention is capable of embedding the tube deep in the ground in the above background,
Still, it is an object of the present invention to provide an installation structure of a vertically buried underground tube for geothermal utilization air conditioning that can keep the cost of tube embedding work low.

[0006]

[Means for Solving the Problems] The above-mentioned problem is that the outer tube of the vertical tube for air conditioning using geothermal heat, which is composed of at least double tubes, is made of steel pipe, and the steel pipe is oriented vertically and is installed in the ground by the rotary press-in method. It is solved by the installation structure of the underground buried vertical tube for geothermal utilization air conditioning characterized by being driven in and installed.

Further, at least the outer tube of the vertical tube for air conditioning using geothermal heat, which has at least double tube made of steel tube, is driven vertically into the ground by the rotary press-fitting method to embed the tube in the ground. This is solved by a method of installing a vertically buried underground tube for air conditioning using geothermal, which is characterized in that

Further, the present invention has been solved by a vertically buried underground tube for air conditioning using geothermal heat, characterized by comprising at least a double tube and an outer tube made of a steel tube which can be driven into the ground by a rotary press-in method. It

In the above-mentioned installation structure, installation method, and tube, the outer tube of the tube is made of a steel tube, and at least this outer tube steel tube is driven directly into the ground by a method of pile driving, so that the tube is grounded. Since the tube is or is capable of being embedded in the inside, the tube can be embedded deep in the ground easily, and yet the construction cost can be kept low.

When the load from the foundation of the building is transmitted to the outer steel pipe of the tube driven into the ground, the outer steel pipe of the tube has a function as a pile for supporting the load of the building. Therefore, the installation condition of the building can be made stable and strong. That is,
In this case, for example, when constructing a building on the ground that requires pile driving, use a pile that has a structure as a tube for geothermal utilization air conditioning, and strike this pile for geothermal utilization air conditioning. The tube can be buried at the same time, and the geothermal air conditioning system can be introduced at low cost.

When the tube is installed under the floor of the building, and the outer pipe steel pipe of this tube is provided with a side protrusion, and the foundation of the building is supported by this side protrusion, the outer pipe steel pipe of the tube is , It is possible to prevent the embedded position of the tube from being restricted to the position of the building foundation while performing the function as a pile that supports the foundation of the building.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

The vertical tube 1 for air conditioning using geothermal heat shown in FIG. 1 has a double tube structure, and the outer tube 2 is a steel tube that can be rotationally press-fitted into the ground. The outer steel pipe 2 has a lower end hermetically closed by a bottom plate 3, and a drilling blade 4 protruding toward the tip end is provided at the lower end, and a bottom expanding blade 5 is attached to the outer periphery of the lower end. Has been.

Inside the outer steel pipe 2, the inner pipe 6 is placed in a concentric state, and an annular ventilation portion 7 extending in the vertical direction is formed between the inner pipe 6 and the outer pipe 2. The annular ventilation portion 7 and the ventilation portion 9 in the inner pipe 6 are communicated with each other through the ventilation holes 8 provided in the pipe wall at the lower end portion. This annular ventilation part 7
The upper end of the inner pipe 6 is closed by a ring plate 10, and outside air intake ports 11 ... Opening to the side at a position below the ring plate 10 are provided, and a fan 12 is provided at the upper end of the outer pipe 2. ing. By driving this fan 12, outside air is taken in through the intake port 11 as shown by the arrow in FIG. 3 or 4.
Is sucked into the annular ventilation part 7 in the tube 1 through
It goes down the annular ventilation part 7 and is sucked into the ventilation part 9 in the inner pipe 6 through the ventilation holes 8 at the lower end of the inner pipe 6, and the ventilation part 9 is raised and blown out upward.

The above tube 1 is buried in the ground as follows. That is, a rotary press-fitting type pile driver is used, and the tube 1 is directly driven into the ground 13 as shown in FIG. For the driving, only the outer steel pipe 2 of the tube 1 is first driven, the outer steel pipe 2 is driven into the ground, and then the inner steel pipe 6 and the fan 12 are attached to the outer steel pipe 2. Alternatively, the outer pipe steel pipe 2 with the inner pipe 6 assembled therein may be driven into the ground, and the fan 12 or the like may be assembled in the driven state, or the outer pipe steel pipe 2 with the inner pipe 6 or the fan 12 or the like assembled therein. May be driven into the ground.

As described above, since the outer tube 2 of the tube 1 is made of a steel tube which can be rotationally press-fitted into the ground, the outer tube 2 can be extremely easily grounded by using a rotary press-fitting pile driving machine. It can be driven deep into the inside 13, whereby the tube 1 can be embedded deep inside the ground 13. Moreover, there is no need to drill holes in the ground or backfill the soil.
Since it suffices to directly drive the outer steel pipe into 3, the cost required for the tube embedding work can be kept low.

By the way, in the conventional method of digging, inserting, and backfilling, the tube was buried at a depth of 4 to 5 m at the most, though much labor was required.
According to the embedding method by rotary press-fitting as described above, the tube 1 can be extremely easily embedded even at a depth exceeding 10 m, and the air conditioning by utilizing the underground heat can be highly effective.

FIG. 3 shows one example of installation of the tube 1 thus buried in the ground 13. In this example,
The tube 1 is driven into the ground under the floor of the building, the outside air intake 11 is opened to the underfloor space portion 14, and the upper end of the tube 1 is connected to the air outlet 16 provided on the floor 15. 17 is a filter, and the sound of the fan 12 is indoors 1
It is preferable to use a sound-insulating filter that suppresses the transmission of the noise. Further, reference numeral 18 is a filter such as an insect screen, which prevents insects and dust from being sucked into the tube 1.

When the fan 12 is driven, the underfloor space portion 14
The air inside is sucked into the annular ventilation part 7 in the tube 1 through the intake port 11 and descends through the annular ventilation part 7, and in the process of this descending, the underground heat and the heat are passed through the pipe wall of the outer pipe 2. They are exchanged and are cooled by geothermal heat in summer and warm by geothermal heat in winter. The outer tube 2 is made of a steel tube with good thermal conductivity,
Moreover, since it is buried deep in the ground, heat exchange with the underground heat is effectively performed. Then, the heat-exchanged air is sucked into the inner pipe 6 through the vent hole 8 at the lower end of the inner pipe 6, rises in the ventilation part 9 in the inner pipe 6, and flows from the upper end of the outer pipe 2 through the blowing part 16 in the summer season. Is cool air indoors 1
It blows out to 9 and warm air blows out indoors 19 in winter.

In such a flow of air in the tube 1, the air that has been sucked into the tube 1 through the outside air intake port 11 and has not yet exchanged heat with the underground heat and the heat exchange with the underground heat are completed. The inner tube 6 is preferably made of a material or structure having excellent heat insulating properties so that the air that rises in the air passage 9 in the inner tube 6 does not exchange heat.

During the summer and rainy season, fans 12
When the air is driven, the outside air exchanges heat with the underground 13 and is cooled to cause dew condensation, and condensed water is collected at the bottom of the outer tube 2, so that the outer tube 2 of the tube 1 has an annular ventilation part. A drainage pipe 20 is inserted through 7, and the dew condensation water can be discharged to the outside through this pipe 20. In order to prevent adverse effects due to corrosion such as rust of the outer steel pipe 2 due to water such as dew condensation water, it is necessary to increase the thickness of the outer steel pipe 2 or provide a coating layer on the wall surface of the outer steel pipe 2. It is good to leave it.

Further, in the example of FIG. 3, the load from the concrete foundation 21 of the building is transmitted to the outer steel pipe 2 of the tube 1, so that the tube 1 also functions as a pile. ing. That is, a steel side projection 22 is attached to the outer steel tube 2 of the tube 1 in a cantilevered state, and this side projection 22 is projected to the lower surface side of the building foundation 21 to The load is transmitted to the outer steel tube 2 of the tube 1 via the lateral protrusions 22. In this way, by using the side protrusions 22 to transfer the load from the building foundation 21 to the outer tube 2 of the tube 1, the tube 1 is made to work as a pile without being embedded right under the foundation 21. Therefore, the air that has passed through the inside of the tube 1 and exchanged heat with the underground heat can be sent into the interior 19 with a simple ventilation structure. of course,
The tube 1 may be driven directly below the foundation 21 to support the foundation 21, or the tube may be driven into the outdoor ground to support the foundation 21 of the building by the lateral protrusions.

In this way, by causing the tube 1 to function as a pile, a tube for air conditioning using geothermal heat as in the present invention is used as a pile to be used when constructing a building on land where pile driving is required. As a result, it is possible to install the geothermal heat utilization air conditioning system with great cost advantage.

In the installation example shown in FIG. 4, the tube 1 is installed by driving it into the underground 13 under the floor of the building so that the outer steel tube 2 is a tube exclusively for air conditioning using geothermal heat that does not receive the load from the foundation of the building. Here is an example. In this way, the tube 1 may have an installation structure that does not function as a pile. In that case, the bottom expanding blades 5 and the like may be omitted.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, regardless of whether or not the outer tube of the tube functions as a stake, a plurality of blades, such as a spiral protruding laterally, are provided at the outer peripheral portion of the outer tube at intervals in the longitudinal direction. As a result, it is possible to enhance the installation stability of the tube and also to enhance the heat exchange efficiency between the air passing through the tube and the underground heat. of course,
Whether or not the outer tube of the tube functions as a pile,
The bottom expanding blades and the like may be omitted. Further, it is needless to say that the structure inside the tube is not particularly limited and can be applied to a vertical tube for air conditioning using geothermal heat having various internal structures.

[0026]

Since the present invention is as described above, the tube can be embedded deep in the ground, and the cost for burying the tube can be kept low.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a tube of an embodiment.

FIG. 2 is a side view showing a method of burying a tube.

FIG. 3 is a cross-sectional side view showing an installation example.

FIG. 4 is a cross-sectional side view showing another installation example.

[Explanation of symbols]

1 ... Vertical tube for geothermal air conditioning 2 ... Outer tube (steel tube) 6 ... Inner tube 13 ... Underground 14 ... Underfloor space 21 ... Basic 22 ... Side protrusion

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Motoyuki Ikeda             6-6 Sakyo 6-2, Nara, Nara Stock Association             Inside Yamato Research Institute F-term (reference) 2D050 AA06 AA16 CB23                 3L049 BB20                 3L103 AA32 BB42 CC22 DD37

Claims (5)

[Claims] 1. An outer tube of a vertical tube for air conditioning using geothermal heat, which is composed of at least double tubes, is made of a steel tube, and the steel tube is installed in a vertical orientation by being driven into the ground by a rotary press-fitting method. A characteristic vertical tube installation structure for geothermal air conditioning. 2. The underground tube for underground air-conditioning for geothermal utilization as claimed in claim 1, wherein the load from the foundation of the building is transmitted to the outer steel tube of the tube driven into the ground. Installation structure. 3. The tube is installed under a building floor,
The underground underground vertical tube installation structure for geothermal utilization air conditioning according to claim 2, wherein the outer steel pipe of the tube is provided with a lateral projection, and the lateral projection supports the foundation of the building. 4. A vertical tube which is at least buried in the underground tube for geothermal use air conditioning and which has at least a double tube made of a steel tube. The outer tube is vertically driven into the ground by a rotary press-fitting method to form a tube. A method for installing a vertically buried underground tube for air conditioning using geothermal, which is characterized by being buried in the ground. 5. An outer tube comprising at least a double tube,
Vertical underground tube for air conditioning using geothermal, characterized by consisting of steel pipe that can be driven into the ground by rotary press-in method.