KR20150035294A - Apparatus and method for discharging soil slurry of excavation hole in underground water geothermy - Google Patents

Abstract

The present invention relates to a device and method for discharging soil slurry from an excavation hole for the geothermal heat of underground water. The purpose of the present invention is to maintain the excavation hole wherein underground water flows for an underground water supply or a geothermal energy exchange and to discharge the soil slurry to the ground by using minimum resources without damage to the excavation hole and a casing. The device for discharging the soil slurry from the excavation hole for the geothermal heat of the underground water is composed of a hollow housing (10) having a slurry input unit (11) connected to the excavation hole (1) and inserted to place the slurry input unit on the soil slurry inside the excavation hole or buried the slurry input unit into the slurry inside the excavation hole; a discharge pipe having one side connected to the inside of the housing and the other side arranged on the ground; and a fluid injecting means (50) injecting a fluid inside the housing to discharge the soil slurry sent to the inside of the housing by the pressure of the fluid via the discharge pipe. The method for discharging the soil slurry from the excavation hole for the geothermal heat of the underground water comprises a first step of connecting the discharge pipe to the hollow housing (10) with the slurry input unit (11) on the bottom and installing a connector of the housing unit and the discharge pipe inside the excavation hole; a second step of sending the soil slurry stacked on the bottom of the excavation hole to the inside of the housing installed inside the excavation hole through the first step; and a third step of injecting the fluid inside the housing wherein the soil slurry is sent to discharge the soil slurry inside the housing to the ground via the discharge pipe.

Description

Field of the Invention < RTI ID = 0.0 > [0001] < / RTI &

More particularly, the present invention relates to a groundwater geothermal excavator capable of discharging a slurry accumulated in an excavation hole in a ground by using a small amount of fluid (compressed air, pressurized water) Apparatus and method.

Groundwater is a water resource that is found by digging at a diameter of 50 ~ 250mm below the surface of the earth. It is being used for drinking water, domestic water, agricultural water or industrial water.

In order to use such groundwater, a pump is installed on the ground, and a submersible motor pump is installed in a groundwater well that is pumped or excavated, and a water pipe is connected to the ground.

In the case of using the groundwater well, sand or slime coming off from the ground water wall or flowing from the ground water well is often pumped to the ground along with the groundwater through the suction side of the underwater motor pump. Such pumped sand or slime may cause the water meter to stop, or the piping may become clogged due to the accumulated sand and inconvenience to use the groundwater. Especially, in the case of geothermal facilities, there are obstacles in the geothermal system, which may cause problems in normal operation of the equipment.

In addition, in the case of agricultural groundwater, when the sprinkler is operated, if the sand that has been pumped together with the groundwater in the operation portion or the nozzle of the sprinkler is caught, the normal operation can not be performed,

In order to solve this problem, conventionally, a sand filter is used to remove the sand in the ground water in the process of filling the inside of the large tank housing with the sand, or a large strainer is installed in the middle of the pipe, Sand removal equipment has been constructed and operated. Or a device for removing sand by using the cyclone effect generated when the ground water passes through a funnel-shaped tank housing. However, it has been difficult to remove 100% of fine sand, and the sand accumulated in a strainer or a sand removing device To remove the slurry, it was necessary to clean the equipment regularly.

Another technique is to inject the compressed air into the excavation hole to discharge the soil and slime to the ground.

In the prior art, by using compressed air and ejector, or by using a suction force of double ejector and compressed air at deep depth, cutting chips or turbid groundwater or slurry at the bottom of the excavation hole are discharged to the ground .

In case of an open geothermal underground heat exchanger drill hole, excavation diameter is usually 200 ~ 250mm, and a PVC casing of 125A inside and outside standard is installed to protect the geothermal hole. The inside diameter is only about 125mm, It was inconvenient to install the ejector, the discharge pipe, and the compressed air injection pipe for discharging.

Especially, since the discharge using the ejector is accompanied by the discharging of the ground water, the slurry, and the compressed air, the discharge amount of the slurry discharged through the discharge pipe is very small. Therefore, the discharging operation time is considerably long and the labor cost and high pressure compressor operation The oil consumption is large, resulting in a great economic burden.

In addition, discharging of the slurry using the ejector at a depth of about 300m was smooth by adjusting the pressure and the amount of the compressed air supplied to the ejector. However, in order to increase the pressure of the compressed air at a depth of 400-500 m or more, The addition of compressors and the adjustment of the amount and pressure of the compressed air injection are extremely difficult, resulting in a decrease in the amount of the slurry discharged from the soil, an increase in the operation time of the equipment, and an increase in the operating oil cost.

Particularly, in the case of the open geothermal underground heat exchanger, the PVC casing is inserted at the completion of the excavation in order to prevent collapse in the state of excavation at a depth of 500 m or more. When the PVC casing scrapes the excavation wall in the insertion process, The pores of the pores are piled up on the bottom of the excavation pore, which causes the failure to insert the PVC casings to the desired depth by the depth of the pavement slurry. However, if it is forcibly inserted by using equipment, the PVC casing is buried with soil slurry. Instead of being inserted, it is concentrated on the bottom of the excavation hole, so that the penetrating pipe with weak supporting force is damaged by the pressure input, In case that the soil slurry is discharged by injecting high pressure compressed air by connecting the rod, the PVC casing is detached due to the compressive force of the high-pressure compressed air and the hydraulic pressure and shock of the discharging groundwater discharged or the PVC casing itself There are many cases where the function of the heat exchanger in the geothermal field can not be completely secured.

In order to solve this problem, preliminary measures have been taken by excavating 20 ~ 30m more than the target excavation depth. However, the PVC casing is excessively buried as slag slurry during the operation and the pore tube is closed, causing the circulation failure of the circulating groundwater And there was a problem of cost increase due to additional excavation.

As a result, in parallel with the process of inserting the PVC casing in the state where the geothermal underground heat exchanger excavator is secured, the PVC casing can be precisely inserted up to the target installation depth. There is a need for a technology capable of eliminating the emission.

Patent No. 10-0661770 Registration Practical Utility Model No. 20-0436287 Registration Utility Model No. 20-0300516 Registered Utility Model No. 20-0300519

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to maintain the excavation hole for supplying groundwater for groundwater supply and geothermal heat exchange, Which is capable of discharging the slurry to the ground, and a method for discharging the slurry to the ground.

A groundwater geothermal excavator soil slurry discharging apparatus according to the present invention is a hollow type having a slurry inlet portion communicating with an excavation hole in the ground, the housing having the slurry inlet portion inserted or buried in the earth slurry accumulated in the excavation hole; A discharge pipe connected to the inside of the housing on one side and disposed on the ground on the other side; And a fluid injecting means for injecting a fluid into the housing and discharging the earth slurry introduced into the housing by the pressure of the fluid through the discharge pipe.

The method includes the steps of connecting a discharge pipe to a hollow housing provided with a slurry inlet at a bottom portion and installing a connection body between the housing and the discharge pipe in an underground excavation hole; A second step of allowing the soil slurry accumulated on the bottom of the excavation hole to flow into the housing installed in the excavation hole through the first step; And a third step of injecting a fluid into the housing through which the soil slurry flows into the interior through the second step and discharging the soil slurry flowing into the housing through the discharge pipe to the ground.

According to the apparatus and method for discharging a slurry of groundwater geothermal excavator slurry, ground slurry accumulated in the excavation hole is discharged to the ground by injecting a fluid at a high pressure, and the slurry is collected in the housing and then the slurry, Therefore, the slurry in the excavation hole can be discharged to the ground after passing through the housing without being disturbed, and the excavation hole can be cleanly cleaned.

Since high pressure fluid and soil slurry flow only through the housing and the discharge pipe, high pressure is not applied to, for example, a PVC casing installed in the excavation hole and excavation hole, so that the phenomenon such as collapse of excavation hole, cracking of casing, As a result, the underground water can be utilized for a long time because the underground water (ground water supply, geothermal) resources can be maintained in optimum condition.

In addition, since the entire excavation hole is not used as the discharge area of the slurry, but only the housing and the discharge pipe are used as discharge areas of the slurry, the pressure of the fluid does not act on the excavation hole as a whole but only on the housing and the discharge pipe. It is possible to reduce the cleaning cost of the excavation hole and shorten the cleaning time since the slurry can be discharged.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an apparatus for discharging a slurry of a groundwater geothermal excavator according to a first embodiment of the present invention; FIG.
2 is a longitudinal sectional view of a groundwater geothermal excavator soil slurry discharging apparatus according to Embodiment 1 of the present invention.
FIG. 3 and FIG. 4 are operational states showing the discharge of the slurry using the apparatus for discharging the slurry discharged from the groundwater geothermal excavator according to the first embodiment of the present invention.
FIGS. 5 and 6 are operational views of an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to a second embodiment of the present invention,
5 is an operation of discharging the slurry discharged into the housing to the ground,
6 is a state ready for introducing the soil slurry outside the housing into the interior of the housing.
7 is a configuration diagram of an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to a third embodiment of the present invention.
8 is a view showing another example of rotation of a screw applied to an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to a third embodiment of the present invention.
9 is a view showing still another rotation of a screw applied to an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to a third embodiment of the present invention.
10 is a schematic view of a groundwater geothermal excavator soil slurry disposal apparatus according to a fourth embodiment of the present invention.
11 is a view showing an inflatable valve applied to an apparatus for discharging a slurry of a groundwater geothermal excavator according to the present invention.
12 is a view showing another example of connection between a discharge pipe and a housing, which is applied to an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to the present invention.
13 is a view showing an example of discharging a slurry of soil slurry to a bottom of a digging hole by spraying water between the slurry hole and the casing as a method of discharging the slurry of the groundwater geothermal excavator according to the present invention.
14 is an exemplary view for solving a residual pressure inside a housing applied to an apparatus for discharging a slurry discharged from a groundwater geothermal excavator according to the present invention.
15 is a view showing another example of a valve that opens and closes a slurry inlet portion applied to a soil slurry discharging apparatus according to the present invention.

≪ Example 1 >

As shown in FIGS. 1 to 4, the groundwater geothermal excavator soil slurry discharging apparatus according to the present embodiment includes a housing 10 having a cylindrical structure having a space therein and a slurry inlet portion at a lower portion thereof, (10) is installed to be reciprocated linearly in the inside of the housing (10) so that the earth slurry in the excavation hole (1) in the ground is moved by the suction force to the housing (10) The piston 20 is connected to the inside of the housing 20 and is driven by the piston 20 of the suction means. The piston 20 moves the piston 20 A discharge pipe 40 for discharging the slurry to the ground and a fluid (liquid such as air or gas such as air) is injected into the inside of the housing 10 so that the slurry adhered to the interior of the housing 10 Discharge pipe (4 0) to the ground.

The housing 10 provides a space for temporary storage of the slurry into the interior of the housing 10 and a slurry inlet 11 in the form of a hole through which the slurry can be introduced into the lower portion of the housing 10, Lt; / RTI >

The slurry inlet 11 may be formed entirely at the bottom of the housing 10 or may be formed of two or more holes in the bottom plate by forming a bottom plate in the housing 10.

The slurry inlet 11 is opened when the soil slurry is inhaled and closed when the slurry is discharged, and a first check valve 12 is formed for this purpose. The first check valve 12 may be a butterfly valve, for example, one side of which is coupled to the hinge 12a, and may be a natural check valve by the pressure generated by the operation of the piston 20 and the fluid injection means 50 without a separate drive source. Closing operation is performed.

In addition, it is preferable that the fixing means is applied so as to prevent shaking of the housing 10 from the suction of the soil slurry to the discharge. The fixing means is made of, for example, a flexible material and is installed at the periphery of the housing 10, and is a fixed packer 13 that expands when fluid (preferably air) is injected therein and contracts when fluid is discharged. In the figure, reference numeral 13a denotes an injection tube for injecting and discharging fluid into the fixed packer 13.

The fixing means may be a fixed packer or a fixed breaker and may be moved in a direction to lower the housing 10 so as not to cause malfunction of the slurry discharge due to the floating of the housing 10 when the slurry is discharged, It is preferable to add a latch function that does not move in the direction.

The fixing means may not be applied since the actuator 30 is installed inside the housing 10 and the piston 20 moves up and down without moving the housing 10.

The housing 10 is formed to have a minimum volume so that the discharge can be facilitated even if the flow rate of the compressed fluid is minimized. That is, the housing 10 is constructed not to inject the compression fluid into the entire excavation hole 1, Since the slurry is discharged by injecting the compressed fluid only through the discharge pipe 40, the required amount of the compressed fluid can be greatly reduced.

The housing 10 has an inner diameter slightly smaller than the diameter of the excavating hole in the case of a general groundwater drilling hole, for example, about 140 mm in the case of a 150 mm groundwater drilling hole, and about 185 mm in outer diameter when the groundwater drilling hole diameter is 200 mm. Meanwhile, in the case of a geothermal drilling rig, when the PVC casing is installed, the diameter is smaller than the inner diameter of the PVC casing. For example, when the inner diameter of the PVC casing is 125 mm, the outer diameter of the housing is about 115 mm.

When a high-pressure compressed fluid is injected into the housing 10, a check nipple is applied to allow the groundwater outside the housing 10 to be immediately introduced into the housing 10 after the closing structure or injection of the compressed fluid is completed It is possible to prevent the housing 10 from being depressed or damaged.

A fluid (compressed air, pressurized water, etc.) is jetted toward the discharge pipe 40 in the vicinity of the bottom and the bottom of the housing 10 to disturb the soil slurry stored in the housing 10, Lt; / RTI > The slurry disturbing means having such a function may be constituted by an injection nozzle provided in the housing 10, an injection hose for supplying the fluid to the injection nozzle, a pump for feeding the fluid to the injection hose, and the like.

The piston 20 moves up and down inside the housing 10 by the actuator 30 using the housing 10 as a cylinder so that the soil slurry flows into the housing 10.

In addition, the piston 20 is formed with a guide portion 21 in the form of a hole for guiding the earth slurry sucked into the housing 10 to the discharge pipe 40. The guide portion 21 is configured to be opened and closed by a second check valve 22 for sucking the slurry and preventing reverse flow of the slurry.

The second check valve 22 may be, for example, a butterfly valve having one side connected to the hinge 22a. When the soil slurry is sucked, the guiding portion 21 is closed. When the soil slurry is discharged, do.

The actuator 30 forcibly raises and lowers the piston 20, for example, a hydraulic cylinder. The actuator 30 of the hydraulic cylinder is mounted through a fixing bracket 33 or the like inside the housing 10 which does not interfere with the discharge of the slurry and does not interfere with the discharge of the slurry, Two fluid lines 31 and 32 for rising and falling are constructed. The fixing bracket 33 can be any structure that does not interfere with the discharge of the slurry.

The inlet pipe 40 is connected to the inside of the housing 10 so as to communicate with the inlet of the housing 10 and is preferably connected to the ceiling of the housing 10 and the outlet of the outlet pipe 40 is connected to the ground. Since the discharge pipe 40 is not only for discharging the slurry by itself but for guiding the slurry to be discharged by the fluid pressure by the fluid injecting means 50, the discharge end on the ground side is connected to a collection tank Such as being connected or being placed on the ground.

The discharge pipe 40 may be made of a flexible material capable of bending, a flexible and non-stretchable synthetic resin (PE, for example), a metal, or a combination of a steel pipe and a synthetic resin pipe. However, if the function of guiding the discharge of the slurry and supporting the housing 10 is also performed, it is preferable that the discharge pipe 40 is made of a steel pipe.

Further, it is preferable that the discharge pipe (40) has two or more pipes connected to each other so as to match the depth of the drilling hole (1).

It is preferable that at least one check valve is formed in the discharge pipe 40 so that the slurry that has flowed into the housing 10 does not flow back toward the housing 10. [

The fluid injecting means 50 includes an injection tube connected to the inside of the housing 10 and a pump for injecting compressed fluid into the housing 10 through the injection tube. The first check valve 12 is closed and the second check valve 22 is opened so that the soil sludge passes through the guide portion 21 and then discharged to the ground side through the discharge pipe 40. [

The pressurized fluid can be operated either by high-pressure pressurized water or compressed air, but it is also possible to inject the pressurized water and compressed air at the same time, thereby facilitating the discharge of the slurry using the lifting force of the compressed air.

Even if the inner volume of the housing 10 or the discharge pipe 40 is formed small, a sufficient supply of compressed fluid must be continuously supplied to discharge the slurry. To this end, a sufficient capacity of a pressure pump and a tank tank And it may be necessary to install and operate an air compressor to supply a high pressure and a large amount of compressed air.

The discharging method using the soil slurry discharging apparatus according to the present embodiment is as follows.

1. Installation of the discharge device.

The piston 20 is preferably set at the bottom of the housing 10 below the top dead center of the housing 10 through the actuator 30 and the fixed packer 13 is retracted when the fixed packer 13 is applied The housing 10 is inserted into the drill hole 1 and the housing 10 is lowered to a position where the soil slurry is accumulated (see FIG. 3).

2. Aspiration of soil slurry.

When the piston 20 is raised through the actuator 30, a negative pressure is applied between the piston 20 and the bottom of the housing 10 so that the first check valve 12 is turned and the slurry inlet 11 is opened So that the soil slurry outside the housing 10 is sucked into the housing 10.

3. Discharge of soil slurry.

4, when the piston 20 reaches the top dead point (the position of the piston 20 can be checked according to the length of the housing 10 or the like, or a limit sensor may be provided to detect the top dead center of the piston 20 When the compressed air or pressure water is supplied to the housing 10 through the fluid injecting means 50, the first check valve 12 located below the inlet of the fluid injecting means 50 The slurry inlet 11 is closed and the guide hole 21 is opened by the second check valve 22 on the piston 20 side so that the slurry adhered to the bottom of the piston 20 is guided by the guide hole 21 And then discharged through the discharge pipe 40 to the ground.

If the soil slurry is not discharged through the discharge end of the discharge pipe 40, all the soil slurry sucked into the housing 10 is discharged, so that the operation of the fluid injection means 50 is stopped.

It is possible to confirm whether or not the slurry is present in the drilling hole 1 by comparing the depth of the drilling hole 1 with the depth of insertion of the housing 10 and if the slurry is left in the drilling hole 1, - Lowering to the depth where the housing (10) is accumulated to the depth of the soil slurry - The soil slurry sucking due to the rise of the piston (20) - While discharging the slurry by the fluid injecting means (50) To discharge the slurry.

≪ Example 2 >

As shown in FIG. 5, the groundwater geothermal excavator soil slurry discharging apparatus according to the present embodiment is an example in which a driving means for moving the piston 20 up and down is provided on the ground. In the housing 10, The piston 20 is connected to a drive means (such as an actuator for lifting and lowering the piston 20) installed on the ground, and is provided with a lift-purpose lifting rod 60 for discharging the slurry.

The check valve (61) is mounted inside of the lift-off lifting rod (60) so that the suction force of the soil slurry due to the negative pressure when the piston (20) do. The check valve 61 allows the groundwater or the like in the housing 10 to flow into the discharge and lift rod 60 when the piston 20 is lowered so as not to interfere with the descent of the piston 20, When the slurry is discharged from the slurry, the slurry is discharged only in one direction so that the slurry is smoothly discharged and does not flow backward. It is preferable that two or more check valves 61 are provided in the inside of the discharge-purpose lifting rod 60 at a certain interval.

According to the present embodiment, since the driving source of the piston 20 is provided on the ground and outside the housing 10 so that the housing 10 can move in the excavation hole 1 when the piston 20 is lifted or lowered, 1, the fixing packer 13 is applied.

The configuration not described in this embodiment is configured in the same manner as the first embodiment described above.

The discharging method using the soil slurry discharging apparatus according to the present embodiment is as follows.

1. Installation of the discharge device.

The piston 20 is lowered together and the piston 20 is lowered to the bottom of the housing 10 preferably below the top dead center of the housing 10 by lowering the exhaust dual use lifting rod 60 via the ground driving means . As the inside of the discharge and use lift rod 60 is opened by the check valve 61 of the discharge and use lifting rod 60 when the piston 20 descends, the ground water or the like at the bottom of the piston 20 is discharged to the discharge- (60), so that the piston (20) descends without difficulty. The housing 10 is inserted into the excavation hole 1 while the fixed packer 13 is retracted and the housing 10 is lowered to a position where the soil slurry is accumulated (see FIG. 6).

2. Aspiration of soil slurry.

When the fixed packer 13 is inflated to support the housing 10 on the drill hole 1 and then the lift-purpose lifting rod 60 is lifted through the driving means on the ground, the piston 20 ascends together, The check valve 61 of the dual use lifting rod 60 is closed so that the lower portion of the piston 20 becomes negative pressure and the first check valve 12 is opened. The slurry is sucked into the housing 10.

3. Discharge of soil slurry.

When the compressed air or pressure water is supplied to the housing 10 through the fluid injecting means 50 when the piston 20 reaches the top dead center, The slurry inflow section 11 is closed by the check valve 12 and the check valve 61 inside the discharge combined lift rod 60 is opened to cause the slurry to rise to the ground along the inside of the discharge- And is discharged to the ground (see FIG. 5).

When the soil slurry is not discharged through the discharge end of the discharge-purpose lifting rod 60, all the soil slurry sucked into the housing 10 is discharged, and thus the operation of the fluid injection means 50 is stopped.

It is possible to confirm whether or not the slurry is present in the drilling hole 1 by comparing the depth of the drilling hole 1 with the depth of insertion of the housing 10 and if the slurry is left in the drilling hole 1, Up by the lifting of the piston 20 due to the lifting of the descending-discharging dual purpose lifting rod 60 to the depth where the soil slurry is accumulated in the housing 10, the soil slurry by the soil slurry suction-fluid injecting means 50 The discharge slurry is discharged from the excavation hole 1 while repeating the discharge process.

≪ Example 3 >

As shown in FIG. 7, in the apparatus for discharging the slurry to the groundwater geothermal excavator according to the embodiment, the slurry slurry is transported upward by the rotation of the screw 15 and stored in the housing 10, ), And each component will be described in detail below.

The housing 10 includes a slurry guide portion 10-1 to which a screw for upwardly moving the soil slurry by the rotation of the screw 15 is mounted, a screw 15 in the slurry guide portion 10-1, And a slurry reservoir 10-2 for storing the slurry slurry which is raised by the rotation of the slurry inlet 10-1 and connected to the fluid injecting means 50 to guide the slurry slurry to the discharge pipe 40, ) And the slurry reservoir 10-2, a check valve 14 is formed. The check valve 14 opens the slurry storage section 10-2 so that the soil slurry upwardly conveyed by the rotation of the screw 15 constituting the slurry guide section 10-1 flows into the slurry storage section 10-2 Is closed so as not to flow back to the slurry guide portion 10-1.

A partition plate 14a having a hole is provided between the slurry guide portion 10-1 and the slurry storage portion 10-2 for installing the check valve 14 and the check valve 14 is installed on the partition plate 14a So that the hole of the diaphragm 14a can be opened and closed.

The slurry guide portion 10-1 may have a bottom open-tubular shape in which the bottom portion of the slurry guiding portion 10-1 is opened to allow the soil slurry to flow therein. The slurry guiding portion 10-1 may guide the slurry inlet portion 11 to the slurry inlet portion 11, To the outside of the housing (10).

In addition, a screw 15 may be additionally installed in the slurry guide portion 10-1 for smooth upward movement and flow of the slurry.

The lower end of the slurry inducing part 10-1 may be formed with a bit so that the slurry inducing part 10-1 can smoothly flow into the slurry inducing part 10-1.

The screw 15 is rotatably installed for effective up-feed.

The screw 15 is rotated by rotation of the discharge pipe 40 by rotation of the discharge pipe 40, by the rotation of the screw 15 by the rotation motor, by rotation of the screw 15 by injection of the fluid, It is possible.

7 shows an example in which the screw 15 is connected to the discharge pipe 40 through the rotating rod 41 and the discharge pipe 40 is rotated on the ground. The discharge pipe 40 is provided with a check valve 42, and is rotatable through a rotating device installed on the ground.

The inlet end of the discharge pipe 40 is rotatably connected to the housing 10 through a bearing or the like while the inlet end of the outlet pipe 40 is disposed near the ceiling portion or the ceiling portion of the slurry storing portion 10-2 of the housing 10 A rotation rod 41 is provided between the lower end of the discharge pipe 40 and the screw 15 so that the discharge pipe 40 and the screw 15 are connected by the rotation rod 41, 41 and the screw 15 are rotated.

8 shows an example of a configuration in which the discharge pipe 40 is fixed and the screw 15 is provided together with the rotary motor 15a so that only the screw 15 is rotated by the rotational force of the rotary motor 15a.

The rotary motor 15a can be a hydraulic motor or the like and is installed inside the slurry storage unit 10-2.

9 shows an example in which the screw 15 is rotated using the fluid of the fluid injecting means 50 for discharging the slurry slurry and the upper part of the screw 15 The injection hose 51 of the fluid injecting means 50 is provided with a first injection port 52 for discharging the slurry and a second injection port for rotating the impeller 15a 53). The first main inlet 52 is open upwardly to inject the fluid toward the discharge pipe 40 and the second main inlet 53 is open laterally to inject the fluid toward the impeller 15a.

Therefore, the fluid injected through the first main inlet 52 of the fluid injecting means 50 is discharged to the discharge pipe 40 through the slurry storing portion 10-2 and the second main inlet 53 The impeller 15a is rotated so that the screw 15 is rotated by the impeller 15a.

Of course, the impeller 15a may be provided with a separate independent fluid inlet for rotating the impeller 15a.

The housing 10 should not rotate together with the screw 15 when the rotary screw 15 is applied as in the present embodiment and the fixing means (fixed packer, fixed breaker 13 -1), a roller, or the like), the housing 10 is not rotated by the screw 15.

The discharging method using the soil slurry discharging apparatus according to the present embodiment is as follows.

1. Install the discharge unit.

Since the present embodiment is to pressurize the housing 10 into the soil slurry and to flow the soil slurry into the slurry storing section 10-2 by the rotation of the screw 15, Which allows the apparatus 10 to press the housing 10 so that the slurry inducing section 10-1 of the housing 10 can receive the slurry slurry into the slurry guide section 10-1) and the rotating device of the discharge pipe 40 are constituted. In addition, a vibrating device may be applied together with the vibrating device to vibrate the housing 10 and the discharge pipe 40 (or the housing 10 only) in order to facilitate the upward movement of the slurry.

After connecting the discharge pipe (40) to the press-fitting device and the rotating device, the housing (10) is inserted into the drill hole (1). At this time, the lower end of the slurry guide portion 10-1 of the housing 10 is placed on the slurry.

2. Discharge of soil slurry.

The housing 10 is pressed through the press-fitting device and the screw 15 is rotated through the rotating device.

The soil slurry passes through the slurry guide section 10-1 by pushing the housing 10 and rotating the screw 15 and then pushing the check valve 14 and flows into the slurry storage section 10-2.

The soil slurry stored in the slurry storage section 10-2 can not flow back to the slurry guide section 10-1 by the check valve 14 and remains in the slurry storage section 10-2.

The slurry slurry stored in the slurry storage unit 10-2 is supplied to the discharge pipe 40 by the fluid pressure injected into the slurry storage unit 10-2 through the fluid injection means 50 and the closing action of the check valve 14. [ And then discharged along the discharge pipe 40 to the ground.

The discharge of the slurry by the fluid injection means 50 can be made while the screw 15 and the discharge pipe 40 are stationary.

Or discharge of the soil slurry by the fluid injecting means 50 is performed by the downward movement of the housing 10 by the compression of the housing 10 and the rotation of the screw 15 and the discharge pipe 40 by using the characteristic of the discharge pipe 40 constituted by the steel pipe In this case, the efficiency of slurry discharge by continuous operation can be increased.

<Example 4>

As shown in FIG. 10, the groundwater geothermal excavator soil slurry discharging apparatus according to the present embodiment separates the housing 10 and the discharge pipe 40 and separates the housing 10 and the discharge pipe 40 through an actuator 70 such as a hydraulic cylinder, So that the soil slurry can be introduced into the housing 10 by lifting the housing 10 while connecting the drain pipe 40 to the fixed position.

The housing 10 is formed with a tubular slide portion 16 so that the discharge tube 40 is slidably inserted into the slide portion 16. The circumferential portion of the discharge tube 40 is equidistantly spaced along the circumferential direction, The actuator 70 is fixed and connected to the housing 10 via the rod 71. [ An O-ring 16a for preventing the leakage of the slurry of the earth slurry is applied between the slide portion 16 and the discharge pipe 40. The O-ring 16a is fixed to the periphery of the discharge pipe 40 or the inside of the slide portion 16 so that the soil slurry does not leak when the housing 10 is slid up and down, 16).

The check valve 14 for opening and closing the slurry inlet 11 of the housing 10 and the fluid injecting means 50 connected to the housing 10 are constructed in the same manner as in the above embodiments.

In this embodiment, the screw of Embodiment 3 may not be applied in FIG. 10, and the screw of Embodiment 3 may be applied although not shown in the drawing.

The method for discharging the soil slurry to the inside of the housing 10 by using the apparatus for discharging the slurry discharged from the groundwater geothermal excavator according to the present embodiment is characterized in that the slurry in the housing 10 by the fluid injecting means 50 is discharged through the discharge pipe 40 And the slurry is introduced into the housing 10 more quickly by moving the housing 10 up and down via the actuator 70 .

In addition, it is possible to prevent the leakage of the earth slurry into the housing 10 due to the descent (including the vibration) of the housing 10 and the discharge-discharge pipe 40 of the slurry, which has flowed into the housing 10, The soil slurry at the bottom of the excavation hole can be discharged through the continuous process by repeating the process of discharging the slurry discharged from the housing 10 into the housing 10.

11 shows another example of a check valve for preventing the slurry slurry introduced into the housing 10 from flowing back to the bottom. The slurry inlet 11 of the housing 10 is provided with a slurry inlet An inflatable valve 17 may be used to close or open the bottom portion 11.

&Lt; Example 5 >

As shown in FIG. 12, the groundwater geothermal excavator soil slurry ejection apparatus according to the present embodiment is characterized in that a separate support rod 43 is used to support the housing 10 and use a flexible discharge hose 44 have.

In the above-described embodiments, the housing 10 is supported by using the discharge pipe 40 or the discharge lifting rod 60. Therefore, in order to forcibly lower the housing 10 to a desired depth, the discharge pipe 40, The supporting rod 43 and the discharge hose 44 are connected to the discharge pipe 40 to support the housing 10 through the support rod 43 and the discharge hose 44 To discharge the soil slurry to the ground.

The discharge pipe 40, the support rod 43 and the discharge hose 44 are connected to each other through, for example, a Y-shaped connecting port 45.

The connection port 45 is opened only to the port where the pipe is connected to the discharge pipe 40 and the port to be connected to the discharge hose 44 so that the earth slurry is discharged to the ground through the discharge hose 44, And the like) is a clogged structure.

According to this embodiment, the housing 10 can be connected to the rigid support rod 43 to insert the housing 10 at a desired depth, and the housing 10 can be inserted into the housing 10 It can be forcibly press-fit.

On the other hand, there is an advantage that the flexible discharge hose 44 is wound around the drum 46 so that the length of the hose 44 corresponding to the depth of the housing 10 is very easy to use.

The connection pipe 45 is not used but the support rod 43 is directly connected to the housing 10 and the discharge hose 43 is connected to the discharge pipe 40 or the discharge pipe 40 is made of a flexible material The method is also possible.

On the other hand, as shown in Fig. 13, when the slurry (or the slurry) accumulated between the excavation hole 1 and the casing 2 installed in the excavation hole 1 is piled up on the wall surface of the excavation hole 1 (Or alternatively, high pressure and low pressure) between the casing 2 and the air hole of the excavation hole 1 through the water supply pipe 80 to discharge the slurry so as to discharge the slurry, So that the soil slurry can flow into the bottom of the housing 1 easily so that the soil slurry can flow into the housing 10 easily.

When a large amount of water is instantaneously supplied to the ground 10 using a large-capacity pump on the ground, the soil slurry is instantaneously supplied to the interior of the upper housing 10, A method of injecting the fluid at a high pressure and discharging the fluid at this time, and a method of increasing the suction force of the soil slurry by connecting a large-capacity suction vacuum pump to the discharge pipe 40.

In this case, a lid 90 is provided at the upper end of the excavation hole so as to maintain the excavation hole tightly.

Meanwhile, in the present invention described above, the fluid is injected into the housing 10 at a high pressure through the fluid injecting means 50 to discharge the slurry to the ground, which may cause a malfunction due to the injection of the high-pressure fluid.

The residual pressure of the high pressure is maintained in the housing 10 even if the injection of the fluid after the discharge of the slurry of the slurry into the slurry inlet 11 of the housing 10 The check valve 12 (or 14) for opening and closing the check valve 12 (or 14) is not opened and the slurry can not flow into the housing 10. The reason for forming the residual pressure is that when the natural water level becomes 20M from the ground surface, the pressure of 2Kg / cm 2 corresponding to the water head difference of 20M is applied to the check valve 12 of the housing 10 even after the fluid pressure is shut off to be. Further, if the check valve at the upper end of the housing 10 is normally operated, the residual pressure inside the housing is maintained.

14, a pressurized fluid supply valve 54 is separately provided on the conduit of the fluid injection means 50, and the pressurized fluid supply valve 54 is connected to the pressurized fluid supply valve 54 by a pulling string 55 And configured to be operable on the ground or open by injection of fluid.

In addition, the purge valve 57 is installed through the inside of the housing 10 and the residual pressure recovery pipe 56. The purge valve 57 can be configured to be opened or closed by the pulling string 58 in the same manner as the pressurized fluid supply valve 54 or by the injection of fluid.

When a pressurized fluid is supplied into the housing 10 through the pressurized fluid supply valve 54 by pulling the pulling string 55 or by supplying hydraulic pressure, a separate purge valve 57 provided at the outer upper end of the housing 10 is blocked When the pressurized fluid supply valve 54 is shut off, the purge valve 57 is opened so that the pressurized fluid in the housing is discharged so as not to remain in the housing 10.

The pressurized fluid supply valve 54 is located at a recent distance from the housing 10 so that a large amount of high pressure fluid is supplied to the inside of the housing 10 in a short time simultaneously with the opening of the pressurized fluid supply valve 54, Can be maximized and the discharge process can be continuously performed.

At the same time when the pressurized fluid supply valve 54 is shut off, the residual pressure inside the housing 10 is removed by opening the purge valve 57, so that the check valve 12 can be opened, It normally flows.

14, the check valve 12 may be installed to maintain the slurry inlet 11 in an opened state (kept open through the elastic member) and the bottom of the housing 10 may be connected to the slurry inlet And may be formed into a pointed shape in an inclined shape so as to be quickly buried.

The valve for opening and closing the slurry inlet 11 is described as a check valve 12 which is opened and closed by the pressure of the fluid. However, as shown in FIG. 15, For example, the valve V is opened and closed through an actuator such as a hydraulic cylinder operated on the ground. At this time, the valve V can be operated to open the slurry inlet 11 when the fluid is injected by the fluid injecting means 50 and to discharge the slurry through the outlet pipe 40 while flowing into the housing 11 have.

10: housing, 11: slurry inlet
20: piston, 30: actuator
40: discharge pipe, 50: fluid injection means
60: exhaust common lift rod, 70: lid

Claims (24)

A housing 10 having a hollow shape with a slurry inlet 11 communicating with an underground excavation hole 1, the slurry inlet being inserted or buried on a slurry of soil deposited in the drill hole;
A discharge pipe (40) having one side connected to the inside of the housing and the other side disposed on the ground;
And a fluid injecting means (50) for injecting a fluid into the housing and discharging the slurry discharged into the housing by the pressure of the fluid through the discharge pipe. Device. A housing 10 having a hollow shape with a slurry inlet 11 communicating with an underground excavation hole 1, the slurry inlet being inserted or buried on a slurry of soil deposited in the drill hole;
A piston (20) installed to be linearly reciprocally movable in the housing and moving from the slurry inlet to the discharge tube to generate a suction force to suck a slurry of soil outside the housing into the housing;
The piston is linearly reciprocated by the driving means to rotate the piston in a direction perpendicular to the direction of rotation of the piston, (60) for introducing the slurry into the inside of the housing and discharging the slurry adhering to the inside of the housing to the ground;
And a fluid injecting means (50) for injecting a fluid into the housing and discharging the earth slurry introduced into the housing by the pressure of the fluid through the discharge lifting and lowering rod, Soil slurry discharge device. The apparatus of claim 1 or 2, further comprising a valve for opening and closing the slurry inlet of the housing. The slurry reservoir (10) according to claim 1, wherein the housing has a slurry inlet (11) at the bottom and the outlet pipe (40) -2) and a slurry guide portion (10-1) formed at the bottom of the slurry storage portion and having a bottom open to guide the slurry to the slurry inlet portion. [6] The apparatus according to claim 4, further comprising a screw (15) rotatably installed in the slurry guide portion for upwardly transferring the slurry. The apparatus according to claim 5, wherein the screw is configured to rotate by fluid injected into the housing by the fluid injecting means. [6] The apparatus of claim 5, wherein the screw is configured to rotate together with the discharge pipe. The apparatus of claim 5, wherein the screw is configured to rotate through a rotating motor. The underground water supply system according to claim 1 or 2, further comprising at least one check valve installed in the discharge pipe or the discharge-use lifting rod to prevent backflow of the slurry introduced into the discharge pipe or the discharge- Geothermal excavator soil slurry discharging device. The piston according to claim 1, further comprising: a piston (20) which is installed to reciprocate linearly in the housing and generates suction force by moving from the slurry inlet to the discharge tube by an actuator to suck the slurry of foreign matter outside the housing into the housing Wherein the slurry is discharged from the groundwater. The apparatus according to claim 1 or 2, further comprising fixing means installed at a periphery of the housing and supported by a wall surface of the excavation hole to fix the housing. The groundwater geothermal excavator soil slurry discharging device according to claim 1 or 2, further comprising slurry disturbing means for disturbing the slurry slurry stored in the housing by spraying fluid toward the discharge portion from the slurry inlet portion of the housing . The apparatus according to claim 1, wherein the housing is vertically connected to the discharge pipe. The apparatus according to claim 1, wherein the housing is connected to a support rod made of a non-flexible material, and the discharge pipe is made of a flexible material. The apparatus of claim 1, wherein the discharge pipe is connected to a support rod of an inflexible material for supporting the housing, and is connected to a drain hose made of a flexible material. A purge valve (57) connected to the inside of the housing (10) through a remainder pressure return pipe (56) and opened when the fluid injection of the fluid injection means is stopped to discharge the fluid remaining in the housing Wherein the slurry is discharged from the groundwater. 4. The apparatus of claim 3, wherein the valve is configured to control opening and closing operations on the ground. The apparatus according to claim 3, wherein the valve is a one-way check valve that is opened and closed by pressure inside and outside the housing. A first step of connecting a discharge pipe to a hollow housing (10) provided with a slurry inlet (11) at the bottom and installing a connection body of the housing and a discharge pipe to a digging hole in the ground;
A second step of allowing the soil slurry accumulated on the bottom of the excavation hole to flow into the housing installed in the excavation hole through the first step;
And a third step of spraying a fluid into the housing through which the soil slurry flows into the interior through the second step and discharging the soil slurry flowing into the housing through the discharge pipe to the ground. A method for discharging a slurry of a geothermal excavator. [20] The method of claim 19, wherein the second step comprises lowering the housing so that the soil slurry outside the housing flows into the housing. [19] The method of claim 19, wherein in the second step, the slurry formed on the bottom of the housing is rotated with the housing lowered so that the slurry outside the housing flows into the inside of the housing. Discharge method. [19] The method of claim 19, wherein the second step includes forming a negative pressure in the interior of the housing to allow the soil slurry outside the housing to flow into the housing by a pressure difference. The method of any one of claims 19 to 22, wherein in the third step, the fluid is sprayed in a direction from the bottom of the housing toward the discharge pipe at the upper part to disturb the slurry introduced into the housing to induce discharge Wherein the soil slurry is discharged from the groundwater. The method of any one of claims 19 to 22, wherein in the second step, water is injected between the casing (2) and the air hole of the excavation hole (1) through the water supply pipe (80) So that the soil slurry easily flows into the housing (10). The method of claim 1, wherein the soil slurry is introduced into the housing (10).

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