KR102175106B1 - Leak Check Device and Method for Vertical Closed Ground Heat Exchanger - Google Patents

Abstract

The present invention relates to a vertically sealed geothermal geothermal heat exchanger leak checking apparatus and method, by quickly repairing the geothermal coil tube by checking the leakage of the geothermal coil tube to reduce the disruption of operation due to leakage of the geothermal system and due to the leakage of the heat exchange medium. It aims to prevent environmental damage caused by.
The vertical sealed geothermal geothermal heat exchanger leak inspection apparatus according to the present invention includes: a supply-side inspection socket 10 and a return-side inspection socket 20 respectively installed in a vertical supply pipe and a vertical return pipe installed in a vertical geothermal hole; A fluid injection pipe 30 for injecting an inspection fluid into the vertical supply pipe through the supply-side inspection socket; A valve for opening and closing the fluid injection pipe, the supply side inspection socket, and the water return side inspection socket, respectively; A pressure measuring device (60) for sensing the pressure inside the vertical supply pipe and the vertical return pipe closed through the valve; And a controller 70 that checks the leakage of the vertical supply pipe and the vertical return pipe based on the pressure value sensed through the pressure measuring device.

Description

Leak Check Device and Method for Vertical Closed Ground Heat Exchanger

The present invention relates to a vertical enclosed geothermal geothermal heat exchanger leak inspection device, and more particularly, to quickly repair the geothermal coil tube by checking the leakage of the geothermal coil tube to reduce the shutdown of the geothermal system and reduce the environment due to leakage of the heat exchange medium. It relates to a vertical sealed geothermal underground heat exchanger leak inspection apparatus and method to prevent destruction.

This part provides background information related to the content of the present application, and is not necessarily prior art.

Geothermal heat refers to the heat of the groundwater and the heat of the ground. In general, after excavating the lower part of the ground to a depth of 100m or more and 500m or so, bury a pipe for heat exchange there to circulate the heat exchange medium or use a deep pump. After pumping the groundwater, it is used through an underground heat exchanger that recovers heat from the groundwater using a heat pump.

The underground heat exchanger is largely divided into an open underground heat exchanger and a closed (closed) underground heat exchanger.

The open underground heat exchanger has the same structure and facilities as the general groundwater deep well, and it is a type of pumping groundwater and not using it as water, but using the heat of the groundwater and then returning it to the inside of the groundwater deep well that has been pumped back. It can be said that it is a method with high concern for groundwater contamination by being exposed to

On the other hand, in the closed-type underground heat exchanger device, two geothermal coil pipes connected by U bands at the bottom are inserted to the bottom so that underground heat exchange can be performed inside the excavated geothermal excavation hole, and then grout between the drilling hole wall and the geothermal coil pipes. It is fixed by filling it with a material. The enclosed underground heat exchanger does not directly pump and expose groundwater, but only functions to exchange heat from the ground through a geothermal coil pipe to exchange the retained heat back to the ground.Therefore, a heat exchange medium (brine) for heat exchange inside the closed circulation pipe is always installed. Since it is circulated by the circulation pump and does not come into direct contact with the groundwater, there is no groundwater pollution compared to the open underground heat exchanger system, so it can be said that it is a system that should be actively recommended in terms of groundwater environment conservation.

The vertical sealing type consists of a process in which a coil pipe made of high-density polyethylene is connected to a U-band after the geothermal hole is excavated, inserted into the geothermal hole, and then buried while maintaining impermeability using a bentonite grouting material while maintaining good thermal conductivity. have.

In addition, when a plurality of geothermal holes are operated, the geothermal holes and the geothermal holes are connected by a trench pipe composed of horizontal pipes, and the trench pipe is also installed as a coil pipe made of high-density polyethylene, and is constructed to cover soil after burial.

The coil pipe (vertical pipe) and trench pipe (horizontal pipe) in the geothermal hole are sealed and watertightly connected.

On the other hand, when replenishment is necessary due to a minute leakage of the heat exchange medium from a circulation pump, etc., replenishment means may be configured to replenish only insufficient amount with replenishment water.

The pipe connection of the vertically sealed geothermal system is generally thermally fused due to the nature of the material, and due to the nature of the installation, the heat fusion connection is equipped with a very large number of structures in the unit geothermal system, and a watertight test is conducted to check whether there is leakage after the facility is completed. City grouting and buried land are purchased.

Nevertheless, there are cases where leakage accidents occur in some vertically enclosed geothermal systems, and especially if the replenishment water is continuously replenished through the make-up water piping, this is an empirical phenomenon that leakage occurs in real time in any part of the vertical enclosed geothermal system. Do.

If supplementary water is continuously replenished in the unit geothermal system, contamination of the surrounding groundwater due to the antifreeze charged inside the geothermal system is inevitable, and it may cause obstacles to the smooth operation of the geothermal system. Freeze-blocking of heavy pipes as well as freeze-breaking of the heat exchanger on the heat pump side may occur, and economical geothermal system operation is difficult due to excessive water charges due to excessive water consumption.

Since most of the vertical enclosed geothermal systems have no exposed parts after embedding the coil pipe and there is no inspection hole to check them, there is a problem that leakage tests cannot be carried out precisely for each section, and due to this, the entire facility is closed in case of a leakage accident. There was a problem leading to it.

Patent document (Registration Patent No. 10-1576690) includes a plurality of heat exchange pipes containing heat transfer fluid inside to recover geothermal heat, and is connected to the geothermal heat exchanger buried in the ground, and is recovered from the geothermal heat exchanger. In a geothermal heat exchange device including a heat pump that moves geothermal energy to a required place to perform cooling and heating by heat exchange, a hydraulic pressure that is provided in each of the plurality of heat exchange pipes to check the decrease in hydraulic pressure of each of the heat exchange pipes As a leak repair method of an underground heat exchanger in which a leakage aid is added to the heat exchange pipe when the heat transfer fluid contained in the heat exchange pipe of the geothermal heat exchanger is leaked and a decrease in hydraulic pressure of the heat exchange pipe is checked, Only the concept of checking the pressure of the heat exchange medium itself is shown, but in reality it is not possible to check the leaking part in the heat exchange pipe.

Registered Patent No. 10-0880675 Registered Patent No. 10-1576690

The present invention is to solve the above-described problems, by quickly repairing the geothermal coil tube through the leak check of the geothermal coil tube to reduce the downtime of the geothermal system (geothermal geothermal heat exchanger), and An object of the present invention is to provide an apparatus and method for checking leakage of a vertically sealed geothermal underground heat exchanger that also prevents environmental destruction.

The vertical sealed geothermal geothermal heat exchanger leak inspection apparatus according to the present invention includes: an inspection socket installed in each of the vertical supply pipe and the vertical return pipe installed in the vertical geothermal hole; A fluid injection pipe for injecting an inspection fluid into the vertical supply pipe and the vertical water return pipe through the inspection socket; A valve for opening and closing the vertical supply pipe, the vertical return pipe, and the fluid injection pipe; A pressure measuring device for sensing pressure in the vertical supply pipe and the vertical return pipe closed through the valve; And a controller for checking leakage of the vertical supply pipe and the vertical return pipe based on the pressure value sensed through the pressure measuring device.

According to the vertical enclosed geothermal geothermal heat exchanger leak inspection apparatus and method according to the present invention, rapid repair of the geothermal coil tube is possible by injecting the inspection fluid into the geothermal coil tube to check whether there is leakage, and thus the operation of the geothermal system for a long period of time It has the effect of improving the reliability of the geothermal system by preventing interruption, and also has the effect of protecting the environment by reducing soil and water pollution caused by leakage of the heat exchange medium to the ground.

1 is an overall configuration diagram of a geothermal system to which a vertical sealed geothermal geothermal heat exchanger leak check apparatus according to the present invention is applied.
Figure 2 is a view of the vertical sealing geothermal geothermal heat exchanger leak checking apparatus according to the present invention.
3 is a view showing an example in which the vertically sealed geothermal geothermal heat exchanger leak checking device according to the present invention is applied to a plurality of geothermal holes.
Figure 4 is a perspective view of a vertical sealing geothermal underground heat exchanger leak check device according to the present invention.
Figure 5 is an exemplary view including a make-up water pipe in the vertical sealing geothermal underground heat exchanger leak inspection device according to the present invention.
6 is a view showing an example in which a wireless pressure sensor is applied to a leak check device for a vertically sealed geothermal underground heat exchanger according to the present invention.
7 is a view showing an example in which the inspection manhole is applied to the leak inspection device of the vertically sealed geothermal underground heat exchanger according to the present invention.
8 and 9 are views showing a cleaning cleaning tool applied to the vertical sealing geothermal underground heat exchanger leak inspection apparatus according to the present invention, respectively.
10 is a view showing an example in which the vertical enclosed geothermal geothermal heat exchanger leak inspection apparatus according to the present invention divides a plurality of geothermal holes into a plurality of zones, and an inspection main manhole and an inspection branch manhole are used together.
11 is a view showing the configuration of the inspection branch manhole applied to FIG.
FIG. 12 is a view showing an example in which a leak detection sensor and a leak transmitter are applied to the vertical sealed geothermal underground heat exchanger leak checking apparatus according to the present invention.
13 shows an example in which the vertical sealed geothermal geothermal heat exchanger leak checking apparatus according to the present invention is applied in a state in which only the vertical supply pipe and the vertical return pipe are constructed at the beginning of construction of a geothermal hole.
14 is a view showing an example in which the fluid injection pipe and the valve of the vertical sealed geothermal geothermal heat exchanger leak checking apparatus according to the present invention are directly installed on the geothermal coil pipe.
15 is a view showing an example in which the valve applied to the vertical sealed geothermal geothermal heat exchanger leak checking apparatus according to the present invention is installed at the upper and lower portions, respectively, centering on the connection between the horizontal supply pipe and the horizontal return pipe.
16 is a view showing an example of application of the vertically sealed geothermal geothermal heat exchanger leak check device according to the present invention, in which a valve is applied to a horizontal supply pipe and a horizontal return pipe for a geothermal hole leak test when a new geothermal hole is installed.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary depending on the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification.

First, a geothermal system to which the vertical enclosed geothermal geothermal heat exchanger leak check device according to the present invention is applied will be described, as shown in FIG. 1, a geothermal coil pipe inserted into the geothermal hole 1 (connected in a U shape at the bottom) It is composed of a vertical supply pipe (2) and a vertical return pipe (3)}, and in addition, a horizontal supply pipe (4) and a horizontal return pipe (5) are connected to the vertical supply pipe (2) and the vertical return pipe (3), respectively, The horizontal supply pipe 4 and the horizontal water return pipe 5 include, for example, configurations respectively connected to the supply side and the return side of the heat pump. In the drawings, unexplained reference numeral 6 denotes an open/close type inspection cover that seals the ground-side opening of the geothermal hole 1.

As shown in Figure 1, the vertical sealing type geothermal underground heat exchanger leak inspection apparatus 100 according to the present invention, the supply-side inspection socket 10 and the return-side inspection socket 20, a vertical supply pipe 2 or a vertical return pipe ( 3) A supply side valve (40) that opens and closes the vertical supply pipe (2) and the vertical return pipe (3) through the fluid injection pipe (30) for injecting fluid into the supply side inspection socket (10) and the water return side inspection socket (20). ) And the return valve (50), the vertical supply pipe (2) and the vertical return pipe (3), a pressure measuring device (60) that senses the internal pressure, and the geothermal coil pipe is based on the pressure value of the pressure measuring device (60). It is composed of a controller 70 that checks the leakage of the vertical supply pipe (2) and the vertical return pipe (3), and the horizontal supply pipe (4) and the horizontal return pipe (5) are respectively connected to the vertical supply pipe (2) and the vertical return pipe (3). When) is connected, a shielding packer 80 shielding the vertical supply pipe 2 and the vertical return pipe 3 with the horizontal supply pipe 4 and the horizontal return pipe 5 is further included.

An example of applying the present invention to a geothermal coil pipe consisting of only the vertical supply pipe 2 and the vertical return pipe 3 is shown, for example, the supply side valve 40 and the fluid injection pipe 30 in the vertical supply pipe 2 {The pressure measuring device 60 is not shown} applied, and only the return valve 50 is applied to the vertical return pipe 3.

The supply-side inspection socket (10) and the return-side inspection socket (20) function to connect the horizontal supply pipe (4) and the horizontal return pipe (5) to the vertical supply pipe (2) and the vertical water return pipe (3), and to check for leaks. It also serves as a function for installation of the device, and the first ports 11 and 21 to which the vertical supply pipe 2 and the vertical water return pipe 3 are connected (heat fusion, etc.), the horizontal supply pipe 3 and the horizontal water return pipe ( 4) is a configuration having a second port (12, 22) to which each is connected and a third port (13, 23) to which the fluid injection pipe (30) is connected, and preferably refers to a range having a T shape.

In the present invention, the supply-side inspection socket 10 and the return-side inspection socket 20 are not essential components, for example, as shown in FIG. 14, a supply-side valve 40 is installed directly on the vertical supply pipe 2, and the supply-side It is also possible to form the fluid injection pipe 30 in the valve 40. That is, the vertical supply pipes 2-1 and 2-2 are divided up and down, and the supply-side valve 40 is assembled between them (via bushings, etc.), and the fluid injection pipes 30-1 are arranged above and below the supply-side valve 40. ,30-2) are connected to each other, and thus, fluid is injected through the upper fluid injection pipe 30-1-the supply side valve 40-the lower side fluid injection pipe 30-2, and the supply side valve When 40 is closed, both the vertical supply pipes 2-1 and 2-2 and the fluid injection pipes are closed.

This configuration is equally applicable to the vertical return pipe (3).

The fluid injection pipe 30 is a configuration for injecting fluid into the geothermal coil pipe (vertical supply pipe 2 and vertical return pipe 3), and is inserted from the third port 13 of the supply-side inspection socket 10 It is inserted into the vertical supply pipe 2 after passing through the first port 11, and a discharge end is preferably disposed above the vertical supply pipe 2.

The vertical supply pipe (2) and the vertical return pipe (3) are connected in a U shape at the bottom of the geothermal hole (1), and thus, the fluid injection pipe (30) is selected from the vertical supply pipe (2) and the vertical return pipe (3). It is possible to inject the fluid only from one side by being applied to only one place, and of course, it is also possible to be applied to both the vertical supply pipe (2) and the vertical return pipe (3).

In addition, the fluid injection pipe 30 is configured to be opened and closed through a supply side fluid valve 600 and a return side fluid valve 700.

The supply-side valve 40 and the return-side valve 50 are configured to seal the vertical supply pipe 2 and the vertical return pipe 3, for example, the supply-side inspection socket 10 and the return-side inspection socket 20. It consists of a tubular valve housing connected to the third ports 13 and 23, respectively, and an opening/closing plate for opening and closing the inside of the valve housing, and the opening/closing plate is operated by manual operation or remote control by an administrator.

As shown in Fig. 15, the supply side valves 40-1 and 40-2 and the return side valves 50-1 and 50-2 are respectively provided with a horizontal supply pipe 4 in a vertical supply pipe 2 and a vertical return pipe 3. And it is also possible to be coupled to the upper and lower portions respectively based on the portion to which the horizontal water return pipe 5 is connected, where the supply-side inspection socket 10 and the return-side inspection socket 20 are applied and not applied. All is possible.

The pressure measuring device 60 is a wired pressure gauge that senses the pressure inside the geothermal coil tube consisting of a vertical supply pipe 2 and a vertical return pipe 3, and a wireless water pressure sensor 60-1 is also possible as shown in FIG. 6.

The installation position of the pressure measuring device 60 is the vertical supply pipe 2, which is a lower part shielded by the shielding packer 80 inside the vertical supply pipe 2, as shown in FIG. 2, and measures the internal pressure or the fluid injection pipe 30 in the middle. A "T" tube was formed in the inlet tube to measure the pressure inside the fluid injection tube so that the result value could be known.

On the other hand, if there is no construction of the inspection device 100 as a new geothermal hole, and there is no connection of the return side horizontal pipe (5), the return side valve (50) is blocked without installing the shielding packer (80) on the vertical return pipe (3). It can be checked through the pressure fluctuation of the corresponding geothermal hole.

In this case, by installing valves 4a and 5a (refer to Fig. 16) on the horizontal supply pipe 4 and the horizontal return pipe 5 side, respectively, the vertical supply pipe 2 is cut off from the horizontal pipes 4 and 5 It is necessary to spatially separate the and vertical return pipe (3).

That is, the pressure measuring device 60 can be installed on one or more of the vertical supply pipe 2 and the vertical return pipe 3.

The controller 70 determines whether there is a leak by checking the pressure change based on the detected value of the pressure measuring device 60.

A number of geothermal holes can be checked for leaks through a single operation, and at this time, each pressure measuring device 60 has a unique number to enable accurate location confirmation of a geothermal hole in which pressure changes are detected among the plurality of geothermal holes. Is granted. That is, as shown in FIG. 3, for example, pressure measuring devices 60-1,60-2 installed in six geothermal holes (1-1,1-2,1-3,,,1-6) 60-3,,, 60-6) are assigned a unique number and are independently managed by the controller 60, and therefore, even if simultaneous leakage is confirmed for a number of geothermal holes 1, a specific leak is suspected. It is possible to check the geothermal hole.

The controller 70 can be installed and operated in a geothermal field, installed and operated in a remote control room, and a wired or wireless operation mode.

The shielding packer 80 blocks the vertical supply pipe 2 and the vertical water return pipe 3 from the horizontal supply pipe 4 and the horizontal water return pipe 5, respectively, and prevents, for example, a fluid (preferably air) injected inside. It is installed at the periphery of the fluid injection pipe 30 in a configuration that expands through and is connected to the fluid injection hose 81 from the ground side.

The shielding packer 80 is installed in both the vertical supply pipe 2 and the vertical return pipe 3, or as described above, by using the return valve 50 before installing the inspection device 100 on the vertical return pipe 3 side. The return pipe (3) side can be omitted and operated. Of course, the vertical supply pipe 2 and the vertical return pipe 3 may be operated in reverse.

The inspection device 100 of the present invention is independently installed on the supply side and the return side for inspection and investigation during facility operation.

In the case of the supply side, a supply-side inspection socket 10, a fluid injection pipe 30, a supply-side valve 40 and a shielding packer 80 are configured, where the supply-side inspection socket 10 is a vertical supply pipe 2 and a horizontal supply pipe. (4) and the supply side valve 40 is fixed to the third port 13 of the supply side inspection socket 10, and the fluid injection pipe 30 and the shielding packer 80 are an assembly of the supply side inspection socket 10. It passes through the inside and is installed in the vertical supply pipe (2). The supply side valve 40 may be separated from the supply side inspection socket 10 and fixedly installed on the fluid injection pipe 30.

In the case of the return side, the return side inspection socket 20, the fluid injection pipe 30, the return side valve 50, and the shielding packer are configured, and are configured in accordance with the aforementioned components of the supply side.

Accordingly, the third port 13 of the supply-side inspection socket 10 is closed through a closing member 14 such as a valve or a plug to maintain the sealing in a state in which the inspection device 100 of the present invention is not assembled.

Various methods are possible as a method of assembling the inspection device 100 of the present invention to the supply-side inspection socket 10, but it is preferably screwed to maintain a sealed state after injecting a fluid, for example, the supply-side A threaded portion is formed in the inspection socket 10 and a nut-shaped clamp screwed to the threaded portion of the supply-side inspection socket 10 may be formed in the supply-side valve 40.

Like the supply side described above, the return side also includes a fluid injection pipe 30, a return side valve 50, and a shielding packer 80 as an assembly, and the third port 23 of the return side inspection socket 20 also includes a closing member. Through.

Of course, as shown in FIG. 13, in the case of an initial vertical geothermal hole facility, after installing sockets in the vertical supply pipe 2 and the vertical return pipe 3 installed in the vertical geothermal hole, both valves 40 and 50 After combining the vertical supply pipe (2), a fluid injection pipe (30) for injecting the inspection fluid is installed, and the fluid injected by the fluid injection pipe (30) is installed in the vertical supply pipe (2) and the vertical return pipe (3). The valves 40 and 50 are closed to prevent leakage, and then the vertical supply pipe 2 and the vertical return pipe closed through the valves 40 and 50 on the side of the other valve 50 to which the fluid injection pipe 30 is not connected ( 3) It can be operated by installing a pressure measuring device that senses the internal pressure.

A leak checking method using the vertical sealed geothermal underground heat exchanger leak checking device according to the present invention is as follows.

1. Open the access cover.

In order to check the leakage of the geothermal coil pipe, the inspection cover 6 closing the geothermal hole 1 is removed (or opened) to open the geothermal hole 1.

2. Open the supply side inspection socket/return side inspection socket and install the inspection device of the present invention.

The third ports 13 and 23 are opened by removing the closing members of the supply side inspection socket 10 and the return side inspection socket 20.

The inspection device 100 of the present invention is inserted and installed in the third ports 13 and 23 of the supply-side inspection socket 10 and the return-side inspection socket 20.

Specifically, with the pressure measuring device 60 inward, the inspection device 100 is inserted into the supply-side inspection socket 10 and the water return-side inspection socket 20, and the discharge end and the shielding of the fluid injection pipe 30 The packer 80 and the pressure measuring device 60 are disposed inside the vertical supply pipe 2 and the vertical return pipe 3 under the supply-side inspection socket 10 and the return-side inspection socket 20.

Subsequently, the inside of the vertical supply pipe 2 and the vertical return pipe 3 is shielded by injecting a fluid into the shielding packer 80 through the fluid injection hose 81 to expand the shielding packer 80.

3. Fluid injection.

Open the supply side valve 40 and inject the fluid (water) into the vertical supply pipe (2). The water return valve 50 is in a closed state, and therefore, fluid is injected only into the vertical supply pipe 2 and the vertical water return pipe 3.

At this time, the water return valve 50 may be temporarily opened to remove air in the pipe, provided that it is closed before checking the pressure change.

4. Pressure detection and judgment.

After injecting a sufficient amount of fluid into the vertical supply pipe (2) and the vertical return pipe (3), it is sealed (closes the supply side fluid valve 600 and the return side fluid valve 700), and vertically through the pressure measuring device 60. The pressure inside the supply pipe 2 and the vertical return pipe 3 is sensed.

The detected value of the pressure measuring device 60 is transmitted to the controller 70 through a wired or wireless transmission device, and the controller 70 compares the detected value of the pressure measuring device 60 with a reference value, and the detected value is the reference value. If it deviates, it is judged as a leak.

When a leak is determined by the controller 70, leak information is transmitted to the server in the control room and an alarm is output together. The leak information is displayed together with the location information of the pressure measuring device 60 to perform maintenance work based on the correct location.

Hereinafter, a configuration additionally applied to the present invention will be described.

1. Make-up water supply means

As shown in FIG. 5, in the present invention, a make-up water pipe 7 is applied to supplement the heat medium inside the geothermal coil pipe. The make-up water pipe 7 is connected to the return or supply side of the geothermal coil pipe and supplies and supplements the heat medium (constant water, etc.).

A make-up water flow meter (8) is applied to measure the amount of heat medium to be replenished through the make-up water pipe (7). The make-up water flow meter 8 is connected to transmit metering information to the controller 70. In the unit geothermal system, a heat exchange medium above the natural leakage or consumption flow rate is leaked, and the amount of replenishment water is measured through the makeup water flow meter 8, and this information is transmitted to the controller 70 to be out of the specified range. In this case, leakage information is transmitted to the server in the control room and an alarm is output together.

In the drawings, reference numeral 9 is a heat pump.

2. Inspection manhole

In the present invention, as shown in FIG. 7, for example, an inspection manhole 90 is provided at the beginning and end portions of the horizontal supply pipe 4 and the horizontal return pipe 5, respectively.

The inspection manhole 90 is the same as a normal manhole and is composed of a manhole body having an inner space and a cover for opening and closing the upper opening of the manhole body.

In the interior of the inspection manhole 90, a tubular inspection hole insertion portion 91 is branched for leak inspection inside the pipe. For example, the inspection hole insertion part 91 is, for example, in the form of a Y, and is connected to the horizontal supply pipe 4 and the horizontal return pipe 5, respectively, to provide a circulation path of the heat exchange medium, while a measuring device for leak inspection and cleaning cleaning Provides a path for the insertion of the sphere.

The inspection hole insertion portion 91 is normally sealed through a closing member such as a plug 92.

The inspection port insertion unit 91, for example, injects high-pressure water into the horizontal supply pipe 4 and the horizontal water return pipe 5 so that the pressure in the horizontal supply pipe 4 and the horizontal water return pipe 5 is higher than the leak test pressure. It was made to be able to pressurize upward.

In this configuration, as shown in FIG. 8, the water tank 93, the pump 94 for pumping the water inside the water tank 93 at high pressure, and the high-pressure water pumped by pumping the horizontal supply pipe 4 A shielding member installed at the periphery of the fluid injection pipe 95 and the fluid injection pipe 95 for injection into the horizontal return pipe 5 and shielding the circumference of the fluid injection pipe 95 for high pressure injection of high pressure water It consists of a pressure sensor 97 that senses the pressure of the high-pressure water injected through the fluid injection pipe 95 and 96.

As shown in FIG. 9, the inspection hole insertion part 91 may be configured such that two or more fluid injection pipes 95 can inject high pressure water at different positions, that is, two fluid injection pipes 95 Each shielding member 96 is installed to form a shielding section between the two shielding members 96, so that water leakage can be checked in this section.

As shown in Fig. 9, when a watertight test is performed by inserting and installing a shielding member 96 between the geothermal hole and the horizontal pipe of the geothermal construction unit and injecting high-pressure water to increase the pressure and performing a watertight test, the pressure measurement sensor 97 By this, the pressure drop is measured, and when this information is transmitted to the controller 70 and is out of a predetermined range, leakage information is transmitted to the server of the control room and an alarm is output together.

3. Large-scale geothermal system

In the case of a large-scale enclosed geothermal system, a number of geothermal holes are grouped into zones and operated by dividing by a number of zones, and in this case, as shown in FIG. 10, the inspection main manhole 200 and the inspection branch manhole 300 are Use together.

An inspection branch manhole 300 is installed between the two or more geothermal hole zones, and an inspection main manhole 200 is installed between the inspection branch manholes 300.

As shown in FIG. 11, the inspection branch manhole 300 is provided with a space therein, and is installed in the manhole body 310, the manhole body 310, which is opened and closed through a cover, and includes supply pipes and return pipes installed in a plurality of geothermal holes. A valve for opening and closing the horizontal supply pipe 4 and the horizontal return pipe 5 connected to the supply-side header 320 and the return-side header 330, the supply-side header 320 and the return-side header 330 for collecting, respectively (321,331), a manhole side supply pipe 340 and a manhole side return pipe 350, manholes respectively connecting the supply side header 320 and the return side header 330 to the supply side pipe and the return side pipe of the inspection main manhole 200 Valves 341 and 351 for opening and closing the side supply pipe 340 and the manhole side return pipe 350, respectively, the supply side and return side pressure measuring devices 322 and 332 for sensing the pressure of the supply side header 320 and the return side header 330, respectively. Consists of

The inspection main manhole 200 is provided with a space therein and is configured in the manhole body 210, the manhole body 210 that is opened and closed through the cover, and the manhole side supply pipe 340 and the manhole side return pipe of the inspection branch manhole 300 350, the access door insertion portion (221 231 in which each configuration is inserted like leak check test apparatus in a feed-side pipe 220 and the water exchange-side duct 230, the supply-side line 220 and the water exchange-side conduit 230 connected to each ), valves 222,223, 232,233 respectively installed on both sides of the inspection hole insertion portions 221 and 231 in the supply side pipe 220 and the return side pipe 230.

The inspection main manhole 200 is configured to be installed at an intermediate position between the inspection branch manhole 300 and the machine room when the horizontal pipe lengthens due to the distance of the geothermal space to enable leakage inspection and repair of the horizontal pipe. The inspection branch manhole 300 is installed and configured to investigate whether or not the horizontal pipe is leaked between the geothermal hole and the inspection main manhole 200, or between the machine room and the inspection branch manhole 300.

The machine room area is also composed of a supply-side header 240 connected to the inspection branch manhole 300 and a pipe, a return-side header 250, inspection hole inserts 221 and 231, and valves.These configurations include the inspection main manhole 200 and It is possible to implement from the configuration of the inspection branch manhole 300.

4. Leak detection

As shown in FIG. 12, a leak detection sensor 400 and a leak transmitter 410 are separately configured to detect leaks in one or more of the horizontal supply pipe 4 and the horizontal return pipe 5.

For example, the leak detection sensor 400 is installed to detect the leak inside the horizontal supply pipe 4, the leak transmitter 410 is connected to the leak detection sensor 400 by wire or wirelessly, and the leak detection sensor 410 The leak is judged based on the detected value, and when the leak is determined, the leak signal is transmitted to the control room. At this time, each leak transmitter 410 is assigned a unique number in order to provide accurate information on the location of the leak.

1: geothermal hole,
2: vertical supply pipe, 3: vertical return pipe
4: horizontal supply pipe, 5: horizontal return pipe
6: inspection cover, 7: make-up water piping
8: make-up water valve,
10: supply side inspection socket, 20: return side inspection socket
30: injection pipe, 40: supply side valve
50: return valve, 60: pressure measuring device
70: controller, 80: shielding packer
90: inspection manhole, 100: inspection device
200: inspection main manhole, 210,310: manhole body
220: supply side pipe, 221: cleaning hole insertion part
222,223,232,233: valve, 300: inspection branch manhole
320: supply side header, 330: return side header
400: leak detection sensor, 410: leak transmitter

Claims (17)

A supply-side inspection socket and a return-side inspection socket for connecting a horizontal supply pipe and a horizontal return pipe to the vertical supply pipe and the vertical return pipe of the geothermal coil pipe installed in the vertical geothermal hole to form a flow path;
A fluid injection pipe configured to inject a fluid for inspection into the vertical supply pipe and the vertical return pipe through the supply-side inspection socket and the return-side inspection socket, and open and close through the supply-side fluid valve and the return-side fluid valve;
A supply-side valve and a return-side valve closing the vertical supply pipe and the vertical return pipe so that the fluid injected by the fluid injection pipe does not leak to the outside of the vertical supply pipe and the vertical return pipe;
A shielding packer installed at the periphery of the fluid injection pipe and shielding the vertical supply pipe and the vertical water return pipe from the horizontal supply pipe and the horizontal water return pipe;
A pressure measuring device for sensing pressure in the vertical supply pipe and the vertical return pipe closed through the supply side valve and the return side valve;
And a controller for checking leakage of the vertical supply pipe and the vertical return pipe or leakage of the horizontal supply pipe and the horizontal return pipe based on the pressure value sensed through the pressure measuring device, whereby the discharge end of the fluid injection pipe and In a state in which the shielding packer and the pressure measuring device are arranged in the vertical supply pipe and the vertical water return pipe under the supply-side inspection socket and the water-return-side inspection socket, the shielding packer is expanded to make the vertical supply pipe and the vertical water return pipe inside the horizontal supply pipe and the horizontal. After shielding from the return pipe, fluid is injected into the vertical supply pipe and the vertical return pipe through the fluid injection pipe, and the supply side fluid valve and the return side fluid valve are closed, and the pressure is sensed through the pressure measuring device to leak. Vertical sealed geothermal geothermal heat exchanger leak check device, characterized in that to check. A supply-side inspection socket and a return-side inspection socket for connecting a horizontal supply pipe and a horizontal return pipe to the vertical supply pipe and the vertical return pipe of the geothermal coil pipe installed in the vertical geothermal hole to form a flow path;
A fluid injection pipe configured to inject an inspection fluid into the vertical supply pipe and the vertical water return pipe through the supply-side inspection socket and the return-side inspection socket, and open and close through the supply-side fluid valve and the return-side fluid valve;
A supply-side valve and a return-side valve for closing the fluid injected by the fluid injection pipe to prevent leakage to the outside of the vertical supply pipe and the vertical return pipe;
A pressure measuring device for sensing pressure in the vertical supply pipe and the vertical return pipe closed through the supply side valve and the return side valve;
And a controller for checking the leakage of the vertical supply pipe and the vertical water return pipe based on the pressure value sensed through the pressure measuring device, whereby the discharge end of the fluid injection pipe and the pressure measuring device are returned to the supply-side inspection socket. The horizontal supply pipe and the horizontal water return pipe are closed with a valve while the vertical supply pipe and the horizontal water return pipe are placed under the side inspection socket, and the inside of the vertical supply pipe and the vertical water return pipe is shielded from the horizontal supply pipe and the horizontal water return pipe. In a state in which fluid is injected into the vertical supply pipe and the vertical return pipe through the fluid injection pipe, and the supply side fluid valve and the return side fluid valve are closed, pressure is sensed through the pressure measuring device to check for leakage. Vertical sealed geothermal underground heat exchanger leak check device. delete The method according to claim 1, wherein the supply-side inspection socket and the water return-side inspection socket include a first port to which the vertical supply pipe and the vertical water return pipe are connected, and a horizontal supply pipe and a horizontal water return pipe connected in a transverse direction from the vertical supply pipe and the vertical water return pipe. Vertically sealed geothermal geothermal heat exchanger leak checking apparatus, characterized in that the T-shaped having a second port connected to each and a third port into which the fluid injection pipe is inserted. delete The method according to claim 4, wherein the supply-side valve and the return-side valve are fixed to the supply-side inspection socket and the third port of the return-side inspection socket, while the fluid injection pipe, the shielding packer, and the pressure measuring device are composed of an assembly or the fluid injection A vertical sealed geothermal geothermal heat exchanger leak checking device, characterized in that the pipe, shielding packer, valve, and pressure measuring device are composed of an assembly and installed in the inspection socket. delete The method according to claim 1, branched into the horizontal supply pipe and the horizontal water return pipe, and is inserted into the horizontal supply pipe and the horizontal water return pipe through the inspection hole insertion part and the inspection hole insertion part sealed through the closing member, and injects a high pressure fluid to the horizontal supply pipe and the horizontal A vertically sealed geothermal geothermal heat exchanger leak inspection apparatus comprising a fluid injection pipe (95) for checking and investigating leakage inside the water return pipe and a shield member (96) shielding the periphery of the fluid injection pipe (95). The vertical sealing geothermal underground heat exchanger leak inspection apparatus according to claim 8, wherein the inspection hole insertion part is formed in an inspection manhole. The system of claim 1, further comprising: at least one leak detection sensor installed at one or more of the horizontal supply pipe and the horizontal water return pipe; Vertical sealed geothermal geothermal heat exchanger leak checking apparatus comprising a leak transmitter for transmitting the detection value of the leak detection sensor to a remote control room. The vertical enclosed geothermal geothermal heat exchange according to claim 8, wherein a plurality of geothermal holes are divided into a plurality of zones, and an inspection main manhole 200 or an inspection branch manhole 300 installed between the areas is included. Air leak check device. The method of claim 11
The inspection branch manhole is provided with a space inside the manhole body 310 opened and closed through a cover, a horizontal supply pipe 4 and a horizontal return pipe 5 and a valve installed in the manhole body and installed in a plurality of geothermal holes While connected through the supply side header 320 and the return side header 330 connected to the inspection main manhole, the supply side and the return side pressure measurement for sensing the pressure of the supply side header 320 and the return side header 330, respectively Devices 322 and 332, a manhole side supply pipe 340 and a manhole side return pipe 350 connecting the supply side header 320 and the return side header 330 to the supply side pipe and the return side pipe of the inspection main manhole 200, respectively Vertical sealed geothermal geothermal heat exchanger leak checking device comprising a. The method of claim 11,
The inspection main manhole is provided with a space inside the manhole body 210 that is opened and closed through a cover, and is configured in the manhole body 210, and the manhole side supply pipe 340 and the manhole side return pipe of the inspection branch manhole 300 Each of the supply-side pipe 220 and the return-side pipe 230 to which 350 is connected, the supply-side pipe 220 and the return-side pipe 230, respectively, and inspection hole insertion portions 221 and 231 into which a leak inspection and investigation device is inserted , Vertically sealed geothermal geothermal heat exchanger leak inspection device, characterized in that it comprises a valve installed on both sides of the inspection port insertion portions (221, 231) in the supply-side pipe (220) and the return-side pipe (230). The vertical according to claim 1 or 2, comprising a make-up water pipe connected to the geothermal coil pipe and supplying make-up water, and a make-up water flow meter that senses the flow rate of the make-up water supplied through the make-up water pipe. Sealed geothermal underground heat exchanger leak check device. As a leak check method using the vertical sealed geothermal underground heat exchanger leak check device according to claim 1,
A first step of opening the geothermal hole;
A second step of opening the supply-side inspection socket 10 and the return-side inspection socket 20 respectively installed in the vertical supply pipe and the vertical return pipe of the geothermal coil pipe;
A fluid injection pipe, a shielding packer, and a pressure measuring device are installed in the supply-side inspection socket 10 and the return-side inspection socket 20, and the discharge end of the fluid injection pipe, the shielding packer, and the pressure measuring device are replaced with the supply-side inspection socket. A third step of expanding the shielding packer in a state disposed in the vertical supply pipe and the vertical water return pipe under the side inspection socket to shield the vertical supply pipe and the vertical water return pipe from the horizontal supply pipe and the horizontal water return pipe;
A fourth step of injecting a fluid into the fluid injection pipe and sensing a pressure through the pressure measuring device;
And a fifth step of determining the leakage of the geothermal coil pipe through a comparison of a detection value sensed through the pressure measuring device and a reference value. The method of claim 15,
A tenth step of blocking the valve in the inspection branch manhole or the inspection main manhole configured at the front end of the inspection hole insertion unit;
Step 20 of opening the inspection hole insertion part and
After inserting and installing the fluid injection pipe 95 and the shielding member 96 in the inspection hole insertion part, the 30th step of shielding a certain section through the shielding member 96 and
A 40th step of injecting a fluid into a section shielded through the shielding packer through the fluid injection pipe 95 and sensing pressure through a pressure measuring device;
And a 50th step of determining the leakage of the geothermal coil pipe through a comparison of a detection value sensed through the pressure measuring device and a reference value. The method according to claim 15, wherein the fifth step transmits the pressure value sensed through the fourth step to a controller through a wired or wireless transmission device, and compares the detected value of the pressure measuring device with a reference value by the controller. A vertical sealed geothermal geothermal heat exchanger leak checking device, characterized in that when a detection value deviates from a reference value is determined as a leak, and when the leak is determined by the controller, leak information is displayed together with the location information of the pressure measuring device.

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