KR101058138B1 - Open type ground heat exchanger that construction and prevention of pollution and post management are easy - Google Patents

Abstract

PURPOSE: An open type terrestrial heat exchanger facilitated for construction, pollution prevention, and management is provided to simply connect the flow path of a binding assembly to the flow path of a circular pipe by mounting the binding assembly in the circular pipe without a separate fastening process. CONSTITUTION: An open type terrestrial heat exchanger facilitated for construction, pollution prevention, and management comprises a subsurface water intake hole(22), an undersurface casing(21), a terrestrial heat exchanger top sealing and fluid circulation device(25), an underwater motor pump(38), a subsurface water pumping main(39), and a subsurface water injection nozzle(40). The terrestrial heat exchanger top sealing and fluid circulation device comprises a circular pipe(36) which is provided on the top of the undersurface casing and has a subsurface water outlet(29) and a subsurface water collecting port(31) on both sides thereof and a binding assembly(26) which has a subsurface water discharge passage(30) and a subsurface water collecting passage(32) which are automatically connected to the subsurface water outlet and the subsurface water collecting port when the binding assembly is put in the circular pipe. The binding assembly has a subsurface water pumping pipe coupler(27) and a subsurface water inlet pipe coupler(28) on the bottom thereof. The subsurface water injection nozzle is connected to the subsurface water inlet pipe coupler in order to guide the subsurface water circulated through a heat exchanger(37) to the subsurface water collecting port.

Description

Open type ground heat exchanger that construction and prevention of pollution and post management are easy}

The present invention relates to an open-type underground heat exchanger that is easy to install and prevent pollution and follow-up management, more specifically, the facilities installed in the underground water collecting hole can be easily installed or separated in the ground water collecting hole, the ground water collecting hole and its The internal facilities are prevented from external contamination, and the maintenance of facilities after construction is very convenient, and it is related to an open-type underground heat exchanger that is easy to install and to prevent thermal pollution and to improve post-management.

The geothermal heating and cooling system, classified as renewable energy, consists of an underground heat exchanger installed in the ground to acquire underground heat, and a ground mechanical installation installed to convert the ground heat into heating and cooling energy.

The underground heat exchanger is further divided into a sealed type and an open type according to the installation method. The sealed underground heat exchanger excavates the ground layer to a depth of several hundred meters, installs a fluid circulation pipe in the excavation section, and installs a circulating fluid such as an antifreeze in the ground. It is installed by moving and circulating a fluid circulation pipe and a heat exchanger installed above the ground to acquire underground heat.

The open ground heat exchanger develops underground water harvesting holes that produce a certain amount of groundwater by digging the ground layers hundreds of meters deep, and then installs an underwater motor pump in the underground water collecting holes and transfers and circulates the ground water to a heat exchanger installed on the ground to obtain heat energy. Install in a way that makes sense.

At this time, the open type underground heat exchanger using groundwater directly in contact with the ground heat in the ground as a circulating medium is known to have much better thermal efficiency than the closed type underground heat exchanger in which the antifreeze is indirectly contacted with the ground heat while circulating the fluid circulation pipe.

It is installed at a depth of 150 meters from the ground surface and obtains about 3RT of heat energy from a sealed underground heat exchanger using antifreeze, etc., whereas an open ground heat exchanger installed at a depth of 450 meters and using groundwater is about. By acquiring 25RT of thermal energy, the depth is about three times the sealed type, but the thermal efficiency is about eight times.

However, despite the relatively high thermal efficiency, the site is avoiding the installation of open ground heat exchangers due to frequent defects and difficulties in improvement work. Therefore, a new open ground heat exchanger installation technology that can secure the safety of the facility is introduced. It is urgently required.

1 is a schematic cross-sectional view showing a conventional open type underground heat exchanger installation structure, referring to the construction procedure for installing a conventional open type underground heat exchanger as follows.

First, excavate the strata and install the subsurface casing 1 in the alluvial section, and then excavate the rock bed to a depth of 300 m to 500 m with the same pore diameter as the inner diameter of the subsurface casing 1 to obtain the underground water collecting hole 2. Finishing, while installing the PVC pipe (4) of 100mm to 125mm diameter inside the ground collecting hole (2) in the whole section, while producing a PVC pipe strainer (5) on the bottom side of the PVC pipe (4) about 20 meters section a rock aquifer layer The groundwater produced in (3) is installed to be introduced into the PVC pipe (4).

In order to protect the upper part of the underground water collecting hole (2) and to prevent contamination, the underground heat exchanger upper protection facility (7) made in the form of a concrete manhole is installed in the upper portion of the underground water collecting hole (2), and then the inside of the PVC pipe (4) Underwater motor pump (9) and groundwater pumping pipe (10) are installed for pumping groundwater at a depth of 50 meters.

Ground water supply pipe (10) to the upper surface of the lower surface casing (1) is connected to the ground water supply pipe (11) to reach the ground heat exchanger (8) installed on the ground, the ground water recovery to return the heat exchanger (8) While installing the pipe 12, the ground water inlet pipe 13, which enters the space between the ground water intake hole 2 and the PVC pipe outer wall at the end thereof, is installed to complete the installation of the open ground heat exchanger.

The conventional open ground heat exchanger obtains ground heat as follows.

Groundwater pumped from the submersible motor pump (9) reaches the ground heat exchanger (8) through the ground water pumping pipe (10) and the groundwater supply pipe (11), and supplies ground heat to the groundwater recovery pipe (12). After descending through the groundwater inlet pipe (13) and recovered to the groundwater intake hole (2) through the groundwater inlet pipe (13) connected to the space between the groundwater intake hole (2) and the PVC pipe (4) outer wall, In the process of moving to the excavation bottom (6) in contact with the ground heat of the rock aquifer (3) and the underground water intake hole (2), the heat is restored and introduced into the PVC pipe (4) through the PVC pipe strainer (5) and upwards The groundwater circulation process is repeated according to the groundwater circulation direction 14 which flows into the submersible motor pump 9 and goes up to the groundwater pumping pipe 10 through the moving process.

The conventional open type underground heat exchanger is provided with an underwater motor pump (9) in order to isolate and block the space where the groundwater is collected and the space where the groundwater is recovered through the groundwater injection pipe (13). A PVC pipe 4 having a diameter is installed, and a PVC pipe strainer 5 is manufactured in a section of about 20 meters on the side surface of the lower end of the PVC pipe 4.

The purpose of the installation of the PVC pipe (4) is to recover the groundwater whose temperature has been changed by returning from the heat exchanger (8) during the operation of the underground heat exchanger through the groundwater recovery pipe (12) and the groundwater injection pipe (13) to the underground water intake hole (2). At this time, by dropping in the space between the ground collecting hole (2) and the outer wall of the PVC pipe (4) so as not to affect the groundwater temperature moving inside the PVC pipe (4), the PVC pipe strainer (5) is manufactured at the lower end The purpose is to move the groundwater recovered through the groundwater inlet pipe (13) to the groundwater intake hole (2) downward while recovering heat through sufficient contact with the ground heat of the rock aquifer (3) and the groundwater intake hole (2). In order to be introduced into the PVC pipe (4).

The upper part of the underground heat exchanger is provided with an upper protection facility made of concrete manholes.

In the conventional open underground heat exchanger, a part of the groundwater pumping pipe (10) and the groundwater supply pipe (11) which rises above the ground surface casing (1) and a part of the groundwater recovery pipe (12) and the groundwater injection pipe (13) are exposed to the outside as it is. This structure is inevitably intended to prevent damage to facilities or winter freezes caused by external shocks.

Structural problems and causes of defects of the conventional open ground heat exchanger described above are as follows.

Underground water collection hole (2) When a part of the PVC pipe (4) to be installed between all the internal breakage in the middle, even if a little damage in the middle, the groundwater recovered to the ground water collection hole (2) through the ground water injection pipe (13) Heat recovery should be sufficient while moving to (6), but the groundwater flows into the PVC pipe (4) through the damaged part of the PVC pipe (4) in the middle and affects the groundwater temperature moving to the submersible motor pump (9). In turn, the thermal efficiency of the open ground heat exchanger is drastically reduced.

Rock powder and crushed rock flowing out with the groundwater from the rock or rock aquifer (3), which can only be lost in the underground water collecting hole (2), are formed inside the underground water collecting hole (2) and the PVC pipe (4) at the bottom of the underground heat exchanger. When the PVC pipe strainer 5 is clogged by being deposited in the space between the outside, the groundwater heat exchanger that circulates the groundwater is lost while the groundwater movement path that enters the PVC pipe 4 through the PVC pipe strainer 5 is blocked. .

If a part of the PVC pipe (4) breaks in the middle, or the PVC pipe strainer (5) is clogged and a fatal problem occurs, the PVC pipe (4) must be drawn out of the ground collecting hole (2) to remedy such a problem. It is very difficult to draw PVC pipes 4 installed at meters to 500 meters deep, especially in the case where rocks and rocks separated from underground water collecting holes 2 and rock aquifers 3 are deposited in the PVC pipe strainer 5 section. Since the PVC pipe 4 cannot be drawn out, improvement cannot be performed.

In addition, the conventional underground heat exchanger upper protection facility (7) consisting of a concrete manhole and a steel plate cover can not effectively prevent the introduction of external pollutants, and is exposed to the interior of the manhole, which is not significantly different from the atmospheric temperature in the winter and winter. The groundwater supply pipe (11) and the groundwater recovery pipe (12) are often freeze, which is difficult to maintain facilities.

An object of the present invention for solving the above-mentioned problems is to provide an installation and a ground heat exchanger that is easy to install or separate the facilities installed in the ground collecting hole and to prevent contamination and follow-up management. .

Another object of the present invention is to provide an underground heat exchanger that is easy to install and prevent pollution and follow-up management to prevent ground collection and the facilities therein from external contamination and to prevent freezing of the facilities.

Still another object of the present invention is to provide an underground heat exchanger that is very convenient to maintain and maintain facilities after construction, and that installation and pollution prevention and post management are easy to be improved immediately if necessary.

Still another object of the present invention is to extend the time that the groundwater discharged from the bottom of the ground collecting hole reaches the submersible motor pump as much as possible so that the installation construction and pollution prevention and after-care are easy for underground heat exchange. To provide a flag.

The underground heat exchanger is easy to install and construction of the present invention to prevent such pollution and follow-up management to achieve the above object; A subsurface casing buried in the upper part of the ground collecting hole; It is provided at the upper part of the lower surface casing, and the groundwater discharge port and groundwater recovery port are respectively provided at both side surfaces, and form an extension space in contact with the ground collection hole up and down, and seal the upper part to prevent external pollution and facility freeze of the open ground heat exchanger. When it is put into the circular pipe and the inside of the circular pipe, the ground water discharge passage and ground water recovery passage are provided on both sides so that the ground tube is in close contact with the inner surface of the circular tube and automatically contacts and communicates with the groundwater discharge outlet and the groundwater recovery outlet. A ground heat exchanger top-closing and fluid circulation system consisting of a bundle of water provided with a groundwater pumping pipe fastener having a discharge passage and a communication passage, and a groundwater injection pipe fastening passage having a groundwater recovery passage and a communication passage; An underwater motor pump installed inside the groundwater collecting hole to pump groundwater to the groundwater pumping pipe fastening side of the binding bundle; An underground pumping pipe connected to the underground pumping pipe connection port of the underwater motor pump and the binding bundle; A groundwater inlet pipe connected to the groundwater inlet pipe fastener of the bundle and injecting groundwater circulated through the heat exchanger into the groundwater intake hole; The submersible motor pump and the ground pumping pipe are installed in the middle upper side of the ground water collecting hole and fastened to contact the ground pumping pipe fastener; The ground water inlet pipe is connected to the ground water inlet pipe fastener and the lower part is located at the bottom of the ground water collecting hole so that the ground water recovered after circulating the heat exchanger is discharged from the bottom of the ground water collecting hole. It is characterized by having a groundwater circulation system to extend the time to reach the submersible motor pump discharged from the heat recovery for a sufficient time.

Another feature of the open-type underground heat exchanger is easy installation and pollution prevention and follow-up management of the present invention, the circular pipe, the casing connecting flange is formed to be coupled to the lower end of the lower surface casing at the lower end, the inside is sealed at the upper end A circular tube sealing cover is coupled so that the inner diameter of the casing connecting flange portion has the same diameter as the inner diameter of the lower surface casing, but its inner diameter gradually increases toward the upper side, and the inner diameter from the inner diameter to the upper end corresponding to the bundle bundle is the same diameter. Since it is made of a binding bundle to ensure a wide working space when installing and separating.

Another feature of the open-type underground heat exchanger is easy installation and pollution prevention and follow-up management of the present invention, the ground water pump, the submersible motor pump, ground water injection pipe is connected to the bottom of the bundle bundle, It is combined with each other by being pressed against the inner circumferential surface of the circular pipe by the weight of the binding bundle without the fastening member, so when the binding bundle is put inside the circular pipe, the groundwater discharge path and groundwater recovery channel of the binding bundle are connected to the groundwater discharge port and groundwater of the circular pipe. It is automatically connected to the recovery port, and when the lifting ring is pulled upward, the binding bundle, the ground water pump, the submersible motor pump and the ground water inlet pipe are separated from the ground water intake pipe regardless of the heat exchanger, the ground water supply pipe, and the ground water recovery pipe. It is provided to facilitate the installation construction and post management.

Another feature of the open-type underground heat exchanger, which is easy to install and to prevent contamination and follow-up management of the present invention, is to mount the binding bundle inside the circular pipe on both side portions of the binding bundle formed with the groundwater discharge passage and the groundwater recovery passage. An O-ring is provided so that the groundwater discharge path and the groundwater recovery path of the binding bundle are in close contact with the groundwater discharge port and the groundwater recovery port of the circular pipe, so that watertightness is maintained therebetween.

In the present invention as described above, the ground water pumping pipe, the submersible motor pump and the ground water injection pipe is coupled to the lower portion of the binding bundle, and the lifting ring is coupled to the upper portion of the binding bundle and the groundwater discharge port and the groundwater recovery port on both sides of the binding bundle. An inclined surface with an O-ring is formed to closely contact the inclined surface. Therefore, if both sides of the binding bundle with groundwater discharge channel and groundwater recovery channel are formed on the groundwater discharge port and the self-recovering water outlet where the slope is formed, and then settled, the weight of the binding bundle, ground water pump, underwater motor pump, groundwater injection pipe As the bundle is pressed downwards, both slopes of the bundle and the slopes of both sides of the groundwater discharge outlet and the groundwater recovery port are in close contact with each other. Therefore, in the relatively simple operation of mounting the bundle inside the circular tube without a separate fastening operation, the flow path of the bundle and the flow path of the circular pipe are connected to each other and watertightness is maintained between them. In addition, when the lifting ring is pulled upward, the bundle and its associated ground water pump, the submersible motor pump and the ground water injection pipe are drawn out together with the bundle. Therefore, it is very easy to install or separate the facilities installed in the underground water collecting hole in the ground water collecting hole.

Open ground underground heat exchanger of the present invention, after the ground for the ground heat exchanger and the installation of the fluid circulation device and the ground water circulation pipe that is connected to the heat exchanger, that is, groundwater recovery pipe and groundwater supply pipe are dug up and buried underground water circulation pipe Refill the destroyed section. Therefore, the open ground heat exchanger of the present invention is exposed to the ground only the top portion of the ground heat exchanger and the circular pipe sealing cover of the fluid circulation device and the groundwater circulation pipe for groundwater circulation is located below the freezing line. Therefore, the underground water collecting hole and the facilities therein are blocked from the outside by the underground heat exchanger top sealing and the fluid circulation device, thereby preventing the underground water collecting hole and the facilities therein from external pollution and preventing the facility from freezing.

Open ground underground heat exchanger of the present invention is easily installed and separated in the ground collection hole in the ground collection hole including the bundle. Therefore, maintenance of facilities after construction is very convenient, and improvement work is possible immediately if necessary.

In the open type underground heat exchanger of the present invention, the submersible motor pump is installed on the upper side of the middle steel of the ground water collecting hole, and the lower part of the ground water inlet pipe is positioned to the bottom of the ground water collecting hole so that the groundwater recovered after circulating the heat exchanger is underground. It is to be discharged from the bottom of the receiving work. Therefore, the groundwater discharge system has a groundwater circulation system that allows heat recovery for a sufficient time by extending the time that the groundwater discharged from the bottom of the groundwater collecting hole reaches the submersible motor pump. Therefore, thermal efficiency is greatly improved due to the unique groundwater circulation system of the present invention.

In the open type underground heat exchanger of the present invention, the inner diameter of the casing connecting flange portion of the circular tube has the same diameter as the inner diameter of the lower surface casing, but the inner diameter thereof gradually increases toward the upper side, and the inner diameter corresponding to both sides of the bundle bundle is combined. The inner diameter to the upper end is made of the same diameter. Therefore, since a relatively large work space is secured inside the round tube, the installation and separation work can be facilitated due to the work space secured widely during the installation and separation of the bundle.

1 is a schematic cross-sectional view showing a conventional open ground heat exchanger
Figure 2 is a schematic cross-sectional view showing an open-type underground heat exchanger installation and pollution prevention and easy post management of the present invention
Figure 3 is a schematic cross-sectional view showing another embodiment of the installation and the pollution prevention and easy maintenance of the open-type underground heat exchanger of the present invention

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 2 is a schematic cross-sectional view showing an open-type underground heat exchanger installation and pollution prevention and easy post management of the present invention.

Open ground underground heat exchanger of the present invention, the lower surface casing 21, the ground heat exchanger top sealing and fluid circulation device 25, the submersible motor pump 38, ground pumping pipe 39, groundwater injection pipe 40 It is done by

The surface subsurface casing 21 is embedded in the upper portion of the ground water collecting hole 22 developed for using the ground water.

The underground heat exchanger upper sealing and fluid circulation device 25 is composed of a circular tube 36, a circular tube sealing cover 34, and a binding bundle 26.

The circular pipe 36 is provided at the upper end of the ground surface lower casing 21 and is provided with groundwater discharge outlets 29 and groundwater recovery holes 31 at both side surfaces thereof, and extends in contact with the ground collection hole 22 up and down. To form.

A circular tube sealing cover 34 is coupled to the upper portion of the circular tube 36 to seal the upper portion of the circular tube 36 to prevent external pollution and facility freeze of the open-type underground heat exchanger.

The circular pipe 36 has a casing connecting flange 35 to be coupled to the lower end of the lower surface casing 21 at the lower end, and the circular tube sealing cover 34 is coupled to seal the inside at the upper end.

The inner diameter of the casing connecting flange 35 of the circular tube 36 has the same diameter as the inner diameter of the lower surface casing 21, but the inner diameter thereof gradually increases toward the upper side, and then the inner diameter corresponding to the circumference of the binding bundle 26 to the upper end thereof. Since the inner diameter is made up of the same diameter until the installation and separation of the bundle bundle 26 to secure a wide working space.

The binding bundle 26 is in close contact with the inner surface of the circular tube 36 when the inside of the circular tube 36 is in contact with the groundwater discharge port 29 and the groundwater recovery port 31 so as to be in contact with each other automatically. A groundwater discharge passage 30 and a groundwater recovery passage 32 are provided in the lower surface, and an underground passageway 27 and a ground passage recovery passage 32 having a groundwater discharge passage 30 and a communication passage thereon. Groundwater injection pipe fasteners 28 having a.

The submersible motor pump 38 is installed in the ground water intake hole 22 to pump the ground water to the groundwater pumping pipe fastening port 27 side of the binding bundle 26.

The ground pumping pipe 39 is connected to the submersible motor pump 38 and the ground pumping pipe fastener 27 of the binding bundle 26.

The groundwater injection pipe 40 is connected to the groundwater injection pipe fastener 28 of the binding bundle 26 and injects groundwater circulated through the heat exchanger 37 into the groundwater intake hole 22.

The open type underground heat exchanger of the present invention, the submersible motor pump 38 and the ground pumping pipe 39 is installed in the middle upper side of the ground receiving hole 22 is fastened to be in contact with the ground pumping pipe fastener 27.

In addition, the groundwater injection pipe 40 is connected to the groundwater injection pipe fastener 28 at the upper end and the groundwater injection outlet 41 at the lower end is located up to the bottom of the ground intake hole 22, and is recovered after circulating the heat exchanger. The ground water is discharged from the bottom of the ground water collecting hole 22, and the ground water discharged from the bottom of the ground water collecting hole 22 is extended to reach the underwater motor pump 38 so as to be heat restored for a sufficient time. It has a groundwater circulation system.

In the present invention as described above, the ground water pumping pipe 39, the submersible motor pump 38, the groundwater injection pipe 40 is connected to the lower portion of the binding bundle 26, the binding bundle 26 is without a separate fastening member While being pressed by the inner circumferential surface of the circular tube by the weight of the bundle (26) is coupled while being in close contact with each other.

Therefore, when the binding bundle 26 is introduced into the circular pipe 36, the groundwater discharge path 30 and the groundwater recovery path 32 of the binding bundle 26 are the groundwater discharge ports 29 and the circular pipe 36. Automatically connected to the groundwater recovery port 31 and pulling the lifting ring 33 upwards, the binding bundle 26, groundwater pumping pipe 39, submersible motor pump 38, groundwater injection pipe 40 is a heat exchanger ( 37) is separated from the ground water intake hole 22 irrespective of the ground water supply pipe 42 and the ground water recovery pipe 43 so as to facilitate installation and follow-up management of the open-type underground heat exchanger.

On both sides of the bundle bundle 26 in which the groundwater discharge passage 30 and the groundwater recovery passage 32 are formed, the groundwater discharge passage of the bundle bundle 26 when the bundle bundle 26 is mounted inside the circular pipe 36 is formed. The O-ring 45 is provided so that the 30 and the groundwater recovery passage 32 are in close contact with the groundwater discharge port 29 and the groundwater recovery port 31 of the circular pipe 36 so that watertightness is maintained therebetween.

The installation procedure of the installation and the installation of the open-type underground heat exchanger easy to prevent external pollution and follow-up management of the present invention is as follows.

First, excavate the strata and install the subsurface casing 21 in the alluvial section, and then excavate the rock bed to a depth of 300 m to 500 m at the same pore size as the inner diameter of the subsurface casing 21 to collect the underground water collecting holes 22. After completion, the periphery of the ground collecting hole 22 is excavated to a depth of about 1 meter, and then the lower surface casing 21 is cut.

The upper surface of the lower surface casing 21 has a one-meter high circular tube 36 each having groundwater discharge ports 29 and groundwater recovery holes 31 on both side surfaces thereof, and the inner surface of the circular tube 36 therein. The groundwater discharge path 30 and the groundwater recovery path 32 which are in contact with the groundwater discharge outlet 29 and the groundwater recovery hole 31 are respectively provided on the side to be in close contact with or separated from each other. Binding bundle (26) equipped with the groundwater pumping pipe connection port (28) and the groundwater inlet pipe connection hole (27) having the communication passage with the ground passage (26), and the circular pipe sealing cover (34) Underground heat exchanger consisting of a) upper sealing and fluid circulation device 25 is fastened to the casing connection flange 35 to form an extension space in contact with the ground receiving hole 22 up and down.

An underground motor pump 38 and an underground water pumping pipe 39 for pumping groundwater are installed in the underground water intake hole 22 where the underground heat exchanger is closed and the fluid circulation device 25 is installed. The ground water injection pipe 40 is installed near the bottom 24, and the upper end of the ground pumping pipe 39 coming into contact with the submersible motor pump 38 is connected to the ground pumping pipe fastening hole 27. , Groundwater injection pipe 40 is installed to be connected to the groundwater injection pipe fasteners (28).

Next, the groundwater supply pipe 42 is connected to the outer end of the groundwater discharge port 29 at the bottom of the trench section so as to reach a heat exchanger 37 installed on the ground, and extends to the groundwater supply pipe 42 to exchange the heat exchanger 37 By installing the groundwater recovery pipe (43) returning to the outside of the groundwater recovery port (31) to complete the installation of the open-type underground heat exchanger of the present invention.

The open ground underground heat exchanger of the present invention can be refilled by refilling a section of the ground heat exchanger for the installation of the top ground sealing and the fluid circulation device 25 and the installation of the groundwater circulation pipe connected to the heat exchanger 37. Only a portion of the circular tube sealing cover 34 of the sealing and fluid circulation device 25 is exposed to the ground, and the supply and recovery pipes for the groundwater circulation are both located below the freezing line.

The open ground heat exchanger of the present invention obtains ground heat by the following method.

The groundwater pumped through the ground pumping pipe (39) by the operation of the submersible motor pump (38) passes through the groundwater pumping channel (27) and the groundwater discharge path (30) having a communication passage. Ground heat is passed through the groundwater discharge port 29 and ground water supply pipe 42 which are in contact with each other to the heat exchanger 37 installed on the ground.

Then, back down the groundwater recovery pipe (43) to enter the groundwater recovery hole (31), and through the groundwater recovery channel (32), the groundwater injection pipe fastener (28) having a communication passage with the groundwater recovery channel (32) and The ground water injection pipe 40 is discharged down to near the water intake drilling excavation bottom 24.

The groundwater discharged near the water intake drilling excavation bottom 24 moves upward again while being in contact with the ground heat of the rock aquifer layer 23 and the ground water intake hole 22 for a long time to recover heat. ) Repeat the groundwater circulation process according to the groundwater circulation direction 44 is introduced again.

The structural features of the open type underground heat exchanger of the present invention are as follows.

Circular pipes 36 each having an underground water discharge port 29 and an underground water recovery hole 31 at both sides of an upper end of the cut-out casing 21 of the developed ground water collecting hole 22; In the structure that is in close contact with or separated from the inner surface of the circular pipe 36 there is a groundwater discharge passage 30 and groundwater recovery passage 32 to contact the groundwater discharge port 29 and the groundwater recovery port 31, respectively. Bound bundle provided with groundwater discharge pipe fasteners 27 having a groundwater discharge passage 30 and a communication passage on the bottom and groundwater injection pipe fasteners 28 having a communication passage with the groundwater recovery passage 32 ( 26); And a ground heat exchanger upper sealing and fluid circulation device 25 composed of a circular tube sealing cover 34.

Circular pipe 36 is fastened to the ground surface casing 21 to form an extension space that is in contact with the ground water intake hole 22 up and down, and the underwater motor pump 38 and ground pumping pipe 39 for pumping ground water It is fastened to be in contact with the ground water pumping conduit 27, and has a structure to fasten the ground water injection pipe 40 in contact with the ground water injection pipe fastening hole (28).

On the other hand, when the binding bundle 26 is put into the circular pipe 36 and in close contact with the inner surface, the underwater motor pump 38 and the ground pumping pipe 39, which are installed in the ground receiving hole 22, and the ground water injection pipe 40 The groundwater discharge passage 30 and the groundwater discharge outlet 29 communicate with each other on one inner surface of the circular pipe 36 at the same time, and on the opposite inner surface, the groundwater recovery passage 32 and the groundwater recovery opening 31 ), The groundwater circulation system of the open type underground heat exchanger of the present invention is completed.

When the binding bundle 26 is pulled up from the inner surface of the circular pipe 36 and pulled up, the underwater motor pump 38, the ground pumping pipe 39, and the ground water injection pipe 40 installed inside the ground collecting hole 22 are integrated. You can easily pull out at once.

The installation-type underground heat exchanger easy to install and prevent pollution and follow-up management of the present invention has the following advantages.

First, the open ground heat exchanger of the present invention is very easy to install and install.

The bottom of the bundle is combined with the ground water pump, the submersible motor pump and the ground water inlet pipe, and the upper part of the bundle is combined with the lifting ring, and the O-ring is provided on both sides of the bundle to closely contact the groundwater outlet and the inclined surface of the groundwater recovery port. Inclined surfaces are formed.

Therefore, if both sides of the binding bundle with groundwater discharge channel and groundwater recovery channel are formed on the groundwater discharge port and the self-recovering water outlet where the slope is formed, and then settled, the weight of the binding bundle, ground water pump, underwater motor pump, groundwater injection pipe As the bundle is pressed downwards, both slopes of the bundle and the slopes of both sides of the groundwater discharge outlet and the groundwater recovery port are in close contact with each other.

Therefore, in the relatively simple operation of mounting the bundle inside the circular tube without a separate fastening operation, the flow path of the bundle and the flow path of the circular pipe are connected to each other and watertightness is maintained between them.

In addition, when the lifting ring is pulled upward, the bundle and its associated ground water pump, the submersible motor pump and the ground water injection pipe are drawn out together with the bundle. Therefore, it is very easy to install or separate the facilities installed in the underground water collecting hole in the ground water collecting hole.

Secondly, the open type underground heat exchanger of the present invention is to break the ground water circulation pipe, that is, the ground water circulation pipe and the ground water supply pipe which are connected to the heat exchanger and the installation of the ground heat exchanger. Afterwards, the broken section is backfilled. Therefore, the open ground heat exchanger of the present invention is exposed to the ground only the top portion of the ground heat exchanger and the circular pipe sealing cover of the fluid circulation device and the groundwater circulation pipe for groundwater circulation is located below the freezing line.

Therefore, the underground water collecting hole and the facilities therein are blocked from the outside by the underground heat exchanger top sealing and the fluid circulation device, thereby preventing the underground water collecting hole and the facilities therein from external pollution and preventing the facility from freezing.

Third, the open type underground heat exchanger of the present invention can be easily installed and separated in the ground collection hole in the ground collection hole including the bundle. Therefore, maintenance of facilities after construction is very convenient, and improvement work is possible immediately if necessary.

Fourth, the open-type underground heat exchanger of the present invention, the submersible motor pump 38 is to be installed on the upper side of the middle steel of the ground intake hole 22, the lower end of the ground water inlet pipe 40, the bottom of the ground intake hole 22 The groundwater recovered after circulating the heat exchanger is discharged from the bottom of the ground collecting hole. Therefore, the groundwater discharge system has a groundwater circulation system that allows heat recovery for a sufficient time by extending the time that the groundwater discharged from the bottom of the groundwater collecting hole reaches the submersible motor pump. Therefore, thermal efficiency is greatly improved due to the unique groundwater circulation system of the present invention.

Fifth, the inner diameter of the casing connecting flange portion of the circular tube has the same diameter as the inner diameter of the lower surface casing, but the inner diameter gradually increases toward the upper side, and the inner diameters corresponding to both sides of the bundle bundle to which the bundle bundle is coupled are the same. Made of diameter.

Therefore, since a relatively large work space is secured inside the round tube, the installation and separation work can be facilitated due to the work space secured widely during the installation and separation of the bundle.

Figure 3 is a schematic cross-sectional view showing another embodiment of the present invention, a plurality of discharge holes 46 are formed around the bottom of the entire length of the ground water injection pipe 40 to the 1/3 point.

Therefore, when the ground water circulated through the heat exchanger 37 is discharged to the ground water intake hole 22 through the ground water inlet pipe 40, the discharge range of the ground water is not concentrated only at the bottom of the underground intake hole 22. It is distributed in a wide space under the receiving hole 22.

Therefore, the circulated ground water is not discharged intensively only at the bottom of the ground collecting hole 22 but is diffused while being widely spread in the lower space of the ground collecting hole 22, so that the heat recovery effect is increased, and go to the bottom of the ground collecting hole 22. Floating phenomena of sitting rock floats are prevented.

21: Surface subsurface casing 22: Underground water collection
23: rock aquifer 24: water extraction drilling excavation
25: Top seal and fluid circulation device of underground heat exchanger
26: binding bundle 27: underground water pumping pipe
28: groundwater injection pipe connection 29: groundwater discharge outlet
30: groundwater discharge route 31: groundwater recovery
32: groundwater recovery channel 33: salvage ring
34: round tube sealing cover 35: casing connecting flange
36: round tube 37: heat exchanger (heat pump)
38: submersible motor pump 39: underground water pump
40: groundwater injection exit 41: groundwater injection exit
42: groundwater supply pipe 43: groundwater recovery pipe
44: groundwater circulation direction 45: O-ring
46: discharge hole

Claims (5)

Underground water collecting holes 22 developed to use groundwater;
A surface lower casing 21 embedded in an upper portion of the ground collecting hole 22;
The upper surface of the lower surface casing (21) and the ground water discharge port 29 and the ground water recovery port 31 is provided on both sides, respectively, and form an extension space in contact with the ground receiving hole 22 up and down and sealed the upper Circular tube 36 to prevent external pollution and facility freeze of the open-type underground heat exchanger, and when it is introduced into the circular tube 36 is in close contact with the inner surface of the circular tube 36, groundwater discharge outlet 29 and groundwater recovery Underground water discharge passage 30 and groundwater recovery passage 32 are provided at both sides to automatically contact and communicate with the ward 31, and the groundwater discharge pipe fastener having a communication passage with the groundwater discharge passage 30 at the bottom side thereof ( 27) and a ground heat exchanger upper sealing and fluid circulation device (25) consisting of a bundle (26) provided with a groundwater injection pipe fastener (28) having a groundwater recovery channel (32) and a communication passage;
An underwater motor pump 38 installed inside the ground intake hole 22 and pumping the ground water to the ground water pumping pipe fastener 27 of the binding bundle 26;
An underground water pump (39) connected to the ground pumping pipe (27) of the underwater motor pump (38) and the bundle (26);
A groundwater injection pipe 40 connected to the groundwater injection pipe fastener 28 of the binding bundle 26 to inject the groundwater circulated through the heat exchanger 37 into the groundwater intake hole 22;
The submersible motor pump 38 and the ground pumping pipe 39 are installed on the middle upper side of the ground collecting hole 22 to be connected to the ground pumping pipe fastening hole 27;
The groundwater injection pipe 40 has an upper end connected to the groundwater injection pipe fastener 28, and the lower end is located to the bottom of the ground intake hole 22. The groundwater discharge system is characterized in that it has a groundwater circulation system that is to be discharged from the bottom portion and the groundwater discharged from the bottom portion of the ground water collecting hole 22 to reach the submersible motor pump 38 so that the heat is restored for a sufficient time. Open type underground heat exchanger for easy construction, pollution prevention and follow-up management.
The method according to claim 1, Circular tube 36,
A casing connecting flange 35 is formed at the lower end to be coupled to the lower end of the lower surface casing 21.
Circular tube sealing cover 34 is coupled to seal the inside of the upper end,
The inner diameter of the casing connecting flange 35 has the same diameter as the inner diameter of the lower surface casing 21, but the inner diameter gradually increases toward the upper side, and the inner diameter from the inner diameter corresponding to the circumference 26 to the upper end has the same diameter. Open construction underground heat exchanger is easy to install and prevent pollution and follow-up management, characterized in that the wide working space is ensured when the installation and separation of the bundle bundle (26).
The method according to claim 1,
The ground water pumping pipe 39, the submersible motor pump 38, the groundwater injection pipe 40 are connected to the lower portion of the binding bundle 26, and the binding bundle 26 is the binding bundle 26 without a separate fastening member. Since it is coupled to each other while being pressed against the inner circumferential surface of the circular tube by its own weight, when the binding bundle 26 is introduced into the circular tube 36, the groundwater discharge path 30 and the groundwater recovery channel 32 of the binding bundle 26 are combined. ) Is automatically connected to the groundwater discharge port 29 and the groundwater recovery port 31 of the circular pipe 36, and pulling the lifting ring 33 upwards, binding bundle 26, groundwater pumping pipe 39, submersible motor pump (38), the groundwater injection pipe (40) is separated from the groundwater intake hole (22) irrespective of the heat exchanger (37), the groundwater supply pipe (42), and the groundwater recovery pipe (43). Open construction underground heat exchanger, characterized in that the installation and pollution prevention and easy post management, characterized in that provided for easy management.
The method according to claim 1, On both sides of the binding bundle 26, the groundwater discharge path 30 and groundwater recovery path 32 is formed,
When the binding bundle 26 is mounted inside the circular pipe 36, the groundwater discharge passage 30 and the groundwater recovery passage 32 of the binding bundle 26 are the groundwater discharge outlet 29 and the groundwater recovery of the circular tube 36. O-ring (45) is provided in close contact with the sphere (31) so that the watertight is maintained therebetween Open construction underground heat exchanger easy to install and prevent pollution and follow-up management.
The perimeter of the lower end of the groundwater injection pipe 40,
Since a plurality of discharge holes 46 are formed, when the ground water circulating through the heat exchanger 37 is discharged to the ground water collecting hole 22 through the ground water injection pipe 40, the discharge range of the ground water is the underground water collecting hole 22. Because it is not intensively discharged only at the bottom of the bottom) to be distributed in a wide space under the ground intake hole 22, it is to prevent the floating phenomenon of the rock floating on the bottom of the ground intake hole 22 and to increase the heat recovery effect. Open type underground heat exchanger with easy installation, pollution prevention and post management.

Images