KR20140132118A - Apparatus for installation of coil type geothermal heat exchanger and method for construction of geothermal heat exchanger using the same - Google Patents

Abstract

The present invention relates to a device for installing a coil-type geothermal heat exchanger and a method of constructing a geothermal heat exchanger using the geothermal heat exchanger. More particularly, the present invention relates to a coherent type geothermal heat exchanger, And more particularly, to a method of installing a coil type geothermal heat exchanger and a method of constructing a geothermal heat exchanger using the same.
The apparatus for installing a coil type geothermal heat exchanger according to the present invention is a coil type geothermal heat exchanger having a hollow tube type rod and a coil type An apparatus for installing an underground heat exchanger, comprising: a stationary member rotatably hinged to a lower portion of the screw to fix an underground heat exchanger coil located at a lower portion of the screw; And an actuating member vertically installed in the rod and connected to one end of the fixing member and releasing the fixing state of the fixing member by a force externally applied thereto.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil type geothermal heat exchanger and a method of installing the coil type geothermal heat exchanger,

The present invention relates to a device for installing a coil-type geothermal heat exchanger and a method of constructing a geothermal heat exchanger using the geothermal heat exchanger. More particularly, the present invention relates to a coherent type geothermal heat exchanger, And more particularly, to a method of installing a coil type geothermal heat exchanger and a method of constructing a geothermal heat exchanger using the same.

Generally, geothermal energy is an energy source stored in the ground through the earth's surface by about 46% of the solar heat, which is estimated to be a multiple of the amount of energy used by mankind, which can be used as an energy source for heating and cooling One system to make it possible is a geothermal system.

Geothermal systems are electrical and mechanical systems that use a constant temperature in a site to provide cooling, heating and hot water for all types of buildings.

In the closed loop system, water is circulated in the circuit through a geothermal heat exchanger, and the geothermal heat from the earth is transferred to the building during the winter. In the summer, the heat is absorbed in the building, And a process of releasing the absorption heat to the outside.

Among the geothermal system underground heat exchangers, there are vertical type, horizontal type, slip type, and coil type in the closed circuit system. In particular, geothermal systems can be divided into several types according to the method of buried underground heat exchanger, and vertical and horizontal systems are installed in most of the most commonly used methods. Vertical system is a method to install a submerged heat exchanger vertically in the ground by perforating the exploration hole in a direction substantially perpendicular to the ground, and the horizontal system is a method of embedding an underground heat exchanger in the horizontal direction of the ground.

In the construction of the vertical type system, a bore hole having a predetermined depth in the vertical direction is excavated at predetermined intervals in the ground, and then a heat exchange pipe as a main body of the underground heat exchanger is inserted into each excavated bore hole And connecting adjacent heat exchange pipes to each other, and connecting both ends of the heat exchange pipes with a heat pump.

In addition, each borehole equipped with a heat exchange pipe is filled with grout material, and a portion of about 6m to 10m from the surface of the borehole has a lower heat transfer characteristic than a general filler material in order to prevent water infiltration due to inflow of surface water into the aquifer or failure of the adjacent aquifer Grouting is carried out with the material.

However, in order to install the geothermal heat exchanger, it is necessary to excavate a plurality of boreholes so that the heat exchange pipes can be respectively inserted. Therefore, a wide construction site is required, a construction period is long due to the bore operation, There is a problem.

An example of a technique for solving such a problem is disclosed in Document 1 below.

The following Patent Document 1 is a recently developed coil type in order to solve the problems of a long construction period and a high cost in boring work. In the case of carrying a manufactured coil type geothermal heat exchanger or burying it in the ground, Wherein the coil type geothermal heat exchanger is constructed such that a heat transfer fluid is filled in a heat exchange pipe having two free ends and a space between the free ends is maintained with a predetermined radius of rotation and spacing, And a shape holding member for preventing the shape of the coil part from being changed even if an external force is applied to the coil part is provided in the coil type geothermal heat exchanger.

However, in installing the conventional coil type geothermal heat exchanger configured as described above, it is difficult to perform the hole digging operation by using an auger (screw type drill mechanism), inserting a coil as an underground heat exchanger into the hole and then injecting grout There is a problem in that the construction period and cost are increased as in the conventional system.

Korea Patent Registration Bulletin 0666469 (2007.01.09 Announcement)

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a coherent type geothermal heat exchanger in which an underground heat exchanger coil is inserted at once when a hole- And then the grout can be poured out from the auger after the coils of the earth heat exchanger are separated from the auger, and a method for constructing the underground heat exchanger using the same.

In order to achieve the above object, an apparatus for installing a coil-type geothermal heat exchanger according to the present invention comprises a hollow-tube-shaped rod and a borehole formed by an auger consisting of a helical screw continuously formed on an outer circumferential surface of the rod, A fixed member hingedly coupled to the lower portion of the screw to fix the underground heat exchanger coil located at a lower portion of the screw; And an actuating member vertically installed in the rod and connected to one end of the fixing member and releasing the fixing state of the fixing member by a force externally applied thereto.

In addition, the method for installing an in-ground heat exchanger using the apparatus for installing a coil-type geothermal heat exchanger according to the present invention is characterized in that it is installed in a bore hole drilled by an auger made of a hollow tube type rod and a helical screw continuously formed on the outer circumferential surface of the rod The method comprising the steps of: installing an underground heat exchanger coil at a lower portion of the screw and fixing the underground heat exchanger coil so that the underground heat exchanger coil is not separated by an underground heat exchanger installation device; A borehole drilling step for drilling the ground by rotating the auger to install the underground heat exchanger coil in the ground; And an underground heat exchanger coil separating step of releasing the underground heat exchanger installation device and separating the underground heat exchanger coil from the screw using the coil separating means provided inside the rod and fixing the underground heat exchanger coil to the bottom surface of the bore hole .

As described above, according to the apparatus for installing a coil-type geothermal heat exchanger according to the present invention and the method for constructing a geothermal heat exchanger using the same, it is possible to perform a hole digging operation by auger, an underground heat exchange coil insertion and a grout injection process at a time So that the construction period and cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an apparatus for installing a coil-type underground heat exchanger according to the present invention; FIG.
BACKGROUND OF THE INVENTION Field of the Invention [0001]
3 is a cross-sectional view of the apparatus for installing a coiled underground heat exchanger according to FIG.
FIG. 4 is a perspective view showing a part of the apparatus for installing a coil-type geothermal heat exchanger according to FIG. 2; FIG.
5 is an enlarged view of part A in Fig.
6 is a view showing another example of the coil separating means according to the present invention.
FIG. 7 is a block diagram showing a method of constructing an underground heat exchanger using a coil type underground heat exchanger installation apparatus according to the present invention. FIG.
8 is a view illustrating a method of constructing an underground heat exchanger using the apparatus for installing a coil-type underground heat exchanger according to the present invention.

The apparatus for installing a coil type geothermal heat exchanger according to the present invention is a coil type geothermal heat exchanger having a hollow tube type rod and a coil type An apparatus for installing an underground heat exchanger, comprising: a stationary member rotatably hinged to a lower portion of the screw to fix an underground heat exchanger coil located at a lower portion of the screw; And an actuating member vertically installed in the rod and connected to one end of the fixing member and releasing the fixing state of the fixing member by a force externally applied thereto.

Further, a hole is formed in the rod so that a part of the fixing member passes through the hole.

In addition, a plurality of supply passages are formed in the inside of the rod at predetermined intervals in the hollow. In the head of the rod, an injection pipe extending from the supply passages and protruding in multiple stages and having a through- And an injection unit having an injection port formed on one side thereof is coupled to an outer circumferential surface of each injection tube.

Further, a coil separating means for separating the underground heat exchanger coil inserted into the bore hole from the auger is provided inside the rod.

In addition, the coil separating means includes a "∩" -shaped insertion pin inserted into the lowermost end portion of the coil of the ground heat exchanger and fixing the coil of the ground heat exchanger to the bottom surface of the bore hole by an external force, And a vertical bar integrally formed at an upper end of the pin.

In addition, the coil separating means includes a "∩" -shaped fixing pin inserted in the lowermost end portion of the underground heat exchanger coil to fix the underground heat exchanger coil to the bottom surface of the bore hole by an external force, A coupling body formed integrally with the upper end of the pin and having an engagement groove formed on an outer surface thereof; an insertion groove detachably coupled to the coupling body and inserted into the lower end of the coupling body, So that an elastic body of an elastic material formed with a locking protrusion is formed.

The method for constructing an underground heat exchanger using the apparatus for installing a coil type geothermal heat exchanger according to the present invention is a method for constructing an underground heat exchanger using a coil type submerged heat exchanger according to the present invention which comprises a hollow pipe type rod and a spiral screw formed continuously on the outer circumferential surface of the rod, A method of constructing a heat exchanger, the method comprising: installing an underground heat exchanger coil at a lower portion of the screw and fixing the underground heat exchanger coil so that the underground heat exchanger coil is not separated by an underground heat exchanger installation device; A borehole drilling step for drilling the ground by rotating the auger to install the underground heat exchanger coil in the ground; A subcooling heat exchanger coil separating step of releasing the fixed state of the underground heat exchanger installing device and separating the coenergy heat exchanger coil from the screw using the coil separating means provided inside the rod and fixing the coenergy heat exchanger coil to the bottom surface of the bore hole .

The grout material supplying step may further include a grout material supplying step of supplying the grout material to the bore hole while discharging the coarse heat exchanger coil from the bore hole and rotating the auger in a reverse direction.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a front view showing another embodiment of the apparatus for installing a coil-type geothermal heat exchanger according to the present invention, and FIG. 3 is a cross-sectional view of the coil type geothermal heat exchanger according to FIG. FIG. 4 is a perspective view showing a part of an apparatus for installing a coil-type geothermal heat exchanger according to FIG. 2, and FIG. 5 is an enlarged view of a portion A of FIG.

As shown in FIG. 1, the rod 11 of the auger 1 has a hollow tube structure so that the grout material can be injected into the inner space of the auger 1, And has a rectangular cross section.

That is, an operation member 5 of a device for installing a coil-type geothermal heat exchanger is installed inside the rod 11 using the structure of the existing rod 11 as it is, and the auger 1, which was inserted in the ground later, The grout material can be supplied to the inside of the rod 11 while being withdrawn.

Here, the grout material supplied through the inside of the rod 11 may be a single grout material, a grout material, compressed air, two different grout materials, or two different types of grout material and / A combination of supplying compressed air or the like is possible.

2 to 5, the apparatus for installing a coil type geothermal heat exchanger according to another embodiment of the present invention includes a rod 11 in the form of a hollow tube and a spiral screw (not shown) continuously formed on the outer circumferential surface of the rod 11, (1) for installing the underground heat exchanger coil (3) in a borehole (2) drilled by an auger (1) made up of a stationary member (4) and an operating member (12) .

Here, the rod 11 is formed with a number of holes 111 corresponding to the fixing member 4 such that a part of the fixing member 4 passes through.

Unlike the structure of the conventional rod 11 described above, the rod 11 has a plurality of hollow supply passages 112 formed therein at regular intervals and extends from the supply passage 112, And an injection pipe 114 having a through hole (not shown) formed therein so as to communicate with each supply passage 112 are formed on the outer peripheral surface of the injection pipe 114. An injection hole 115a is formed on the outer peripheral surface of each injection pipe 114, (Not shown).

Sand, grout, bentonite, and compressed air are injected into the three supply channels 112 formed in the rod 11 in order from the center. In particular, the reason for injecting the two types of grout materials is to reduce the cost because the grout materials are so expensive, and other types of grout materials other than the sand, bentonite, which are the grout materials, may also be used.

The compressed air is also used for discharging the soil generated when the auger 1 is used to puncture the bore hole 2 to the outside.

A hydraulic motor 113 is installed at the head of the rod 11 and the hydraulic motor 113 serves as a driving source for rotationally driving the auger 1. [

Although not shown in the drawings of the present invention, a guide plate (not shown) for guiding different types of grout materials supplied through the supply passages 112 to the bore holes 2 is separately provided at the end of the rod 11 Not shown) is preferably provided.

The injection unit 115 is formed as a circular case rotatably coupled to each injection tube 114 and having a cavity formed therein and a receiving space formed therein. Of the injection units 115, the injection unit 115 for injecting air may inject air compressed by the compressor through the injection port 115a.

The underground heat exchanger coil 3 is preferably made of a material which has a relatively good thermal conductivity and can withstand the expansion and contraction of the underground, and is located below the screw 12 along the spiral direction of the screw 12.

The fixing member 4 is rotatably hinged to the lower portion of the screw 12 to fix the underground heat exchanger coil 3 located under the screw 12.

Although only one of the fixing members 4 is shown in the drawing, the present invention is not limited thereto. A plurality of fixing members 4 may be provided at a lower portion of the screw 12 to support the coils 3 of the underground heat exchanger bar.

The fixing member 4 is centered on a hinge portion formed at a lower portion of the screw 12 and has one end thereof passed through a hole 111 formed in the rod 11, And is connected to an operating member 5 which is provided as a unit.

The operation member 5 is vertically installed in the rod 11 and connected to one end of the fixing member 4 to release the fixing state of the fixing member 4 by external force . The actuating member 5 is provided in the form of a bar in the inside of the rod 11 or one or more.

The actuating member 5 is connected to a cylinder (not shown) or a mechanism (not shown) for transmitting a motion to actuate the actuating member 5 during rotation, and moves up or down according to the driving of the cylinder, The fixing member 4 is rotated. That is, when the actuating member 5 is raised, the fixing member 4 which is interlocked with the actuating member 5 is released from the fixed state and the coils 3 of the underground heat exchanger are disengaged. On the contrary, when the actuating member 5 is lowered, The member 4 is in a fixed state to support the underground heat exchanger coil 3 to prevent it from escaping.

A coil separating means 6 for separating the underground heat exchanger coil 3 inserted into the bore hole 2 from the auger 1 is provided inside the rod 11, (6) is inserted in the lowermost end portion of the underground heat exchanger coil (3) to form a "∩" -shaped shape in which the underground heat exchanger coil (3) is fixed to the bottom surface of the bore hole And a vertical bar 62 integrally formed on the upper end of the insertion pin 61. The vertical bar 62 is formed integrally with the upper end of the insertion pin 61,

The coil separating means 6 constructed as described above operates the auger 1 in a clockwise direction to puncture the bore hole 2 and thereafter the ground heat exchanger coil 1 fixed to the lower portion of the screw 12 of the auger 1 The ground heat exchange coil 2 is temporarily pressurized and fixed to the bottom surface of the bore hole 2 so as to leave the bore hole 2 in the bore hole 2. [ Therefore, the underground heat exchanger coil 2 is completely separated from the auger 1 while the auger 1 is operated counterclockwise in a state where the underground heat exchanger coil 2 is fixed.

6 is a view showing another example of the coil separating means according to the present invention, wherein the coil separating means 6 is inserted into the lowermost end portion of the underground heat exchanger coil 3, Shaped fixture pin 63 that fixes the underground heat exchanger coil 3 to the bottom surface of the bore hole 2 and a fixing pin 63 formed integrally with the upper end of the fixture pin 63, An insertion groove 651 is formed at a lower end of the coupling body 64 so as to insert the coupling body 64 therein and an inner side of the insertion groove 651 And an operation bar 66 formed with an elastic body 65 having an engaging protrusion 652 for engaging with the retaining groove 641.

The fixing pin 63 performs the same function as the insertion pin 61 described above, and the operation bar 66 plays the same role as the vertical bar 62 described above. The elastic body 65 of the actuating bar 66 is elastically coupled to the engaging body 64 formed integrally with the fixed pin 63 so that the actuating bar 66 is pressed to fix the fixing pin 63 to the bore hole 2, and then pulling the operation bar 66 outward, the elastic body 65 of the operation bar 66 is separated from the joining body 64. Then, The fixing pin 63 fixed to the bottom surface of the bore hole 2 while the lowermost end portion of the underground heat exchanger coil 3 is pressed causes the underground heat exchanger coil 3 And to fix it to the inside of the bore hole 2 so as not to go up together.

FIG. 7 is a block diagram illustrating a method of installing an underground heat exchanger using the apparatus for installing a coil-type underground heat exchanger according to the present invention. FIG. 8 is a cross- Fig.

As shown in FIGS. 7 and 8, the method for constructing an underground heat exchanger using the apparatus for installing a coil-type geotechnical heat exchanger according to the present invention comprises a hollow pipe-like rod 11, A method of installing an underground heat exchanger in a borehole (2) drilled by an auger (1) made up of helical screws (12), comprising the steps of: installing an underground heat exchanger coil (100) , And an underground heat exchanger coil separation step (300).

First, the underground heat exchanger coil installation step 100 places the underground heat exchanger coil 3 at the lower part of the screw 12 and fixes the underground heat exchanger coil 3 so as not to be separated by the underground heat exchanger installation device do.

The underground heat exchanger installation device includes a fixing member 4 rotatably hinged to the lower portion of the screw 12 to fix the underground heat exchanger coil 3 located under the screw 12, And an operation member 5 vertically installed in the inside of the fixing member 4 and connected to one end of the fixing member 4 and releasing the fixing state of the fixing member 4 by external force.

Thus, the underground heat exchanger coil 3 is positioned at the lower part of the screw 12 along the spiral direction of the screw 12, and the underground heat exchanger coil 3 is placed in the sub- And is fixed to the bottom of the screw 12 to prevent the escape.

The bore hole drilling step 200 excavates the ground by rotating the auger 1 in order to install the underground heat exchanger coil 3 in the ground.

The borehole 2 is inserted into the auger 1 while the underground heat exchanger coil 3 is fixed in the longitudinal direction while the borehole 2 having a predetermined diameter and depth is pierced using the auger 1, Respectively.

The underground heat exchanger coil separating step 300 releases the fixed state of the underground heat exchanger installation device and separates the underground heat exchanger from the screw 12 by using the coil separating means 6 installed inside the rod 11, The coil 3 is detached and fixed to the bottom surface of the bore hole 2.

That is, when the drilling of the borehole 2 is completed, the operation member 5, which is a constituent element of the underground heat exchanger installation device for fixing the underground heat exchanger coil 3, is raised to the upper side and the underground heat exchanger coil 3 The fixed member 4 that has been supported is interlocked and rotates to release the fixed state of the underground heat exchanger coil 3. [

In this state, when the auger 1 is taken out to the outside by pressing the lowermost end of the coils 3 by using the coil separating means 6 and fixing it to the bottom surface of the bore hole 2, (3) do not come out together.

In the method for constructing the geothermal heat exchanger according to the present invention, the underground heat exchanger coil 3 is separated from the bore hole 2, and then the auger 1 is rotated in the reverse direction, And a grout re-supply step (400) for supplying the ash.

The auger 1 is gradually drawn out to the outside while the ground heat exchanger coil 3 is fixed to the bottom surface of the bore hole 2, Thereby preventing the gap and the deformation of the coils 3 of the underground heat exchanger 3 and preventing the inflow of water.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many obvious changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: auger
11: Load
111: hole
112:
113: Hydraulic motor
114: Injection tube
115: injection unit, 115a: injection port
12: Screw
2: bore hole
3: Underground heat exchanger coil
4: Fixing member
5:
6: coil separating means
61: Insertion pin
62: Vertical bar
63: Fixing pin
64: Coupling
641:
65: elastomer
651: insertion groove, 652: locking projection
66: Operation bar

Claims (8)

An underground heat exchanger coil 3 is attached to a bore hole 2 punctured by an auger 1 composed of a rod 11 in the form of a hollow tube and a spiral screw 12 continuously formed on the outer peripheral surface of the rod 11 An apparatus for installing a coil-type geotechnical heat exchanger for installation,
A fixing member 4 rotatably hinged to the lower portion of the screw 12 to fix the underground heat exchanger coil 3 located under the screw 12;
And an operation member 5 vertically installed inside the rod 11 and connected to one end of the fixing member 4 and releasing the fixing state of the fixing member 4 by a force externally applied thereto Wherein the heat exchanger is provided with a heat exchanger.
The apparatus as set forth in claim 1, wherein the rod (11) is provided with a hole (111) through which a part of the fixing member (4) passes.
[3] The apparatus according to claim 1 or 2, wherein a plurality of supply passages (112) are formed in the rod (11)
The rod 11 is formed at its head with a plurality of injection tubes 114 extending from the supply passage 112 and having a plurality of through holes communicating with the supply passages 112, Is connected to an injection unit (115) having an injection port (115a) formed at one side thereof on an outer circumferential surface of the coil-shaped underground heat exchanger.
The auger according to claim 1, wherein a coil separating means (6) for separating the underground heat exchanger coil (3) inserted into the bore hole (2) from the auger (1) Characterized in that the coil-type underground heat exchanger installation device.
The underfloor heat exchanger according to claim 4, wherein the coil separating means (6) is inserted at the lowermost end of the underground heat exchanger coil (3) so that the underground heat exchanger coil (3) And a vertical bar (62) integrally formed on an upper end of the insert pin (61). The insert pin (61) Device.
The underfloor heat exchanger according to claim 4, wherein the coil separating means (6) is inserted at the lowermost end of the underground heat exchanger coil (3) so that the underground heat exchanger coil (3) An engaging member 64 formed integrally with the upper end of the fixing pin 63 and having an engaging groove 641 formed on the outer surface thereof, And an engaging recess 651 is formed at the lower end of the engaging recess 651 so that the engaging recess 641 is inserted into the engaging recess 641. The engaging recess 651 is engaged with the engaging recess 641, And an operating bar (66) in which an elastic body (65) of elastic material is formed.
A method of constructing an underground heat exchanger installed in a bore hole formed by auger made of a hollow tube type rod and a helical screw continuously formed on an outer circumferential surface of the rod,
An underground heat exchanger coil installing step of placing an underground heat exchanger coil at a lower portion of the screw and fixing the underground heat exchanger coil so as not to be separated by an underground heat exchanger installing device;
A borehole drilling step for drilling the ground by rotating the auger to install the underground heat exchanger coil in the ground;
A subcooling heat exchanger coil separating step of releasing the fixed state of the underground heat exchanger installing device and separating the coenergy heat exchanger coil from the screw using the coil separating means provided inside the rod and fixing the coenergy heat exchanger coil to the bottom surface of the bore hole Wherein the heat exchanger is installed in the submerged heat exchanger.
8. The method according to claim 7, further comprising a grout material supplying step of supplying the grout material to the bore hole while separating the coen- dle heat exchanger coil from the bore hole, Construction method.

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