KR102305210B1 - Fixing well cover of underground water - Google Patents

Abstract

The present invention protects the inner upper protection hole and the inner upper protection hole installed on the upper part of the inner well material inserted into the drilling hole of the groundwater well from the outside, the lower part is provided with an opening and the upper part includes a cover A protective hole outer case, a lower pipe coupled to the inner surface of the lower opening of the outer case and disposed to be inserted into the excavation hole, provided at the upper end of the lower pipe and coupled to the lower portion of the outer case, to insert a shielding material injection hose A flange with a through hole that can be formed, a pumping pipe that is inserted into the inner well material and the upper part is exposed through the inner upper protective hole and is connected to the meter, and is coupled or formed on the lower outer peripheral surface of the lower pipe to drop the shielding material Provided is a sealed upper protection hole of an underground water well including a blocking part to prevent

Description

{Fixing well cover of underground water}

The present invention relates to an upper protection hole of an underground water well, and in particular, it proposes a new upper protection hole that effectively blocks the inflow of contaminated water from the surface layer, improves the coupling structure of the pumping pipe, and is easy to construct and maintain.

Groundwater is water that is stagnant or flowing because rainwater or snow that has fallen on the surface penetrates into the ground and is used as a major water resource together with surface water such as river water. development demand is increasing. Groundwater has great utility in that it can secure safe water at low cost in a short period of time. However, if groundwater is used excessively than the amount supplemented by rainwater or the water quality deteriorates due to infiltration of contaminants, a long period of time and effort are required for regeneration and recovery.

In the groundwater well, an intake hole to obtain actual groundwater is excavated, and observation wells are installed at multiple locations spaced apart around the intake hole. The observation well is used to measure the level of groundwater by inserting a sensor into the well or measure electrical conductivity to detect components such as _{NO 3 and salinity in the groundwater.} A submersible motor pump and pumping pipe are installed inside the underground water well where the intake hole has been excavated, and a sealed upper protection hole is installed at the top of the well to prevent contamination of groundwater quality.

The upper protection hole can be formed by stacking bricks, but as time goes by, the management can become poor, and surface pollutants, rainwater, sewage, insects, etc. can enter the well and contaminate the groundwater. On the other hand, if the stainless metal is processed by forming and welding and installed in a sealed pipe well, there is an advantage in that various sources of contamination can be blocked. The upper protection hole of the groundwater well should block the inflow of pollutants, and the overall shape and combination of parts should be simple and easy to install, and there should be no inconvenience in construction and maintenance.

According to Patent No. 10-0977056, it is installed at the entrance of the well to prevent water shock, and when the pumping pressure reaches a set value, chlorine is automatically supplied to the groundwater for disinfection. , the pumping pipe is connected to the meter installed in the meter case through the connection port, and the groundwater that has passed through the meter is mixed with the amount of chlorine supplied from the chlorine injector and then discharged.

In addition, according to Patent Registration No. 10-0997253, it relates to an upper pollution prevention device of an underground water hole, by connecting a pumping water pipe and a water supply pipe with a “∩” type discharge head and pressing and supporting the discharge head to watertight the pumping water pipe and the water supply pipe. It not only prevents contamination of the groundwater hole, but also prevents the separation of the pumping pipe and the water supply pipe.

Although such an upper protection hole proposes a new technology for preventing contamination of groundwater, it is difficult to prevent polluted water flowing into the well from the surface layer. In particular, when it is difficult to excavate when installing facilities related to underground water wells, such as bedrock layers, or when there is a high possibility of groundwater inflow, such as basalt strata with many internal perforations, it is impossible to manage groundwater quality with the prior art. In fact, during the construction of the upper protection hole of the groundwater well, it is only excavated to the depth and width where the protection hole is installed and cement or concrete is poured. it remains.

In order to increase the durability of the developed groundwater well and maintain the quality of the groundwater, it is necessary to provide a blocking part to prevent pollutants from entering the excavation from the surface layer when installing the upper protection hole, and development of the upper protection hole structure is required for this .

In addition, when the sealed upper protection hole is installed in a new well or installed in an existing well, the overall work efficiency should be excellent, and it should be possible to efficiently maintain and manage the groundwater well after installation. To this end, it is necessary to improve the arrangement structure of various pipes and parts related to the upper protection hole and the fastening method between the parts.

The present invention was invented under the above technical background, and is to fundamentally block the inflow of polluted water and pollutants from the surface layer around the well by using the sealed upper protection hole installed in the groundwater well of the present invention.

In addition, another object of the present invention is to improve the internal structure of the sealed upper protection hole of the groundwater well and the fastening method of the parts.

Another object of the present invention is to enable efficient maintenance and management of the groundwater well and to increase the durability of the groundwater well.

In addition, other objects and technical features of the present invention will be presented in more detail in the following detailed description.

In order to achieve the above object, the present invention protects the inner upper protection hole and the inner upper protection hole installed on the upper part of the inner well material inserted into the drilling hole of the groundwater well from the outside, and an opening is provided at the bottom and a protective hole outer case including a cover on the upper portion, a lower pipe coupled to the inner surface of the lower opening of the outer case and disposed to be inserted into the excavation hole, provided at the upper end of the lower pipe and coupled to the lower portion of the outer case, A flange having a hole for inserting a hose for injection of a shielding material is formed, a pumping pipe that is inserted into the inner well material and the upper part is exposed through the inner upper protection hole and is connected to the meter, and the outer peripheral surface of the lower pipe is located on the lower part Provided is a sealed upper protection hole of an underground water well including a blocking part that is combined or formed to prevent falling of the shielding material.

The upper protection hole of the groundwater well of the present invention further includes a shielding layer formed of at least one shielding material that is filled in the space between the inner surface of the excavation hole and the lower pipe and blocks the inflow of contaminants from the surface layer.

The shielding layer is formed by laminating a shielding material filled through the through hole of the flange, and after the shielding layer is formed, the through hole of the flange is preferably closed by inserting a fastening means.

In the present invention, a plurality of unions are interposed as piping coupling parts at both ends of the meter connected to the pumping pipe exposed through the internal upper protection hole, and the union includes a circular coupling nut, and on the outer peripheral surface of the circular coupling nut A plurality of locking grooves may be formed perpendicular to the center direction.

In addition, in the present invention, a corrugated pipe may be coupled between the pumping pipe and the meter exposed through the inner upper protective hole.

According to the present invention, while the inflow of contaminated water from the surface layer around the groundwater well is effectively blocked, the coupling structure of the pumping pipe of the upper protection hole is improved, and the construction and maintenance of the sealed upper protection hole facility is easy.

In addition, the miniaturization and simplification of related parts such as the upper protection hole and meter of the underground water well are possible, and the protection hole and the meter box can be integrated or installed separately, so that appropriate responses can be made according to the situation of the wells facility site.

Through the sealed upper protection hole of the groundwater well of the present invention, it is expected that it will be able to contribute greatly to the use and protection of water resources because it is easy to manage groundwater as well as to effectively use groundwater.

1 is a cross-sectional schematic view schematically showing a closed upper protection hole facility of an underground water well of the present invention;
2a and 2b are plan views of the sealed upper protection hole;
3A and 3B are perspective views showing a lower pipe for forming a shielding layer;
4 is a schematic diagram showing the shielding layer inside the excavation surface of the surface layer of the groundwater well;
5 is a schematic view showing a lower pipe coupled to the outer case;
6 is a plan view showing the upper protection hole cover;
7a and 7b are a perspective view and a plan view showing a pumping pipe support;
8a and 8b are a schematic view showing a perspective view and a release operation of the union structure;
9a and 9b are a side view and a perspective view showing the improved structure and tool of the union;

The present invention proposes a new sealed upper protection hole installed in an underground water well, and by improving the structure of the upper protection hole, grouting the surface layer inside the well is possible, and the arrangement structure and coupling method of the upper protection hole and pumping pipe are improved and installed And it is possible to supply a sealed upper protection hole that is easy to manage.

Specifically, the sealed upper protection hole of the present invention presents the following improved technical features.

A shielding layer is formed between the outer circumferential surface of the inner well material disposed inside the well and the excavation surface to block the source of contamination from the ground layer. do. In addition, a corrugated pipe is installed between the outer case of the upper protection hole and the meter box in which the meter is installed, which mediates the connection of the pumping pipe extending through the upper protection hole from the inside of the pipe well. In addition, in order to solve the problem that the number of parts increases and the overall product size increases as the coupling structure constituting the upper protection hole and peripheral devices becomes more complicated, each connection part of the pumping pipe from the inside of the sealed upper protection hole to the water tank line is connected to a union. We propose a new union part that simplifies the coupling structure using piping materials and is easy to fasten and disassemble.

1 is a cross-sectional schematic view schematically showing the sealed upper protection hole 100 facility of the groundwater well of the present invention, wherein the inner upper protection hole 110 is inserted into the excavation hole of the groundwater well and disposed inside the well material ( It is installed on top of P). The inner upper protective hole is disposed inside the outer case 102, and the outer case is disposed in the excavation area around the stratum (G) above the well drilling hole to protect the inner upper protective hole from the outside and the upper cover 104. is seated, and an opening is provided in the center of the lower bottom plate 106 to interlock with the well.

A lower pipe 120 inserted into the excavation hole is disposed on the inner surface of the lower opening portion of the outer case. In the present invention, the lower pipe at the bottom of the outer case and the upper protection hole inside the outer case are interlocked inside and can be welded in one way. For example, the upper protection hole inside the outer case may be fixed by welding on the upper surface of the outer case bottom plate or the outer circumferential or inner surface of the lower case, or may be coupled to the outer case bottom plate by bolting. The lower pipe may be formed as a structure bent to fit the outer diameter of the inner well material, and may be welded to the bottom plate of the outer case or fixed by bolting to the bottom plate. In the space between the inner surface of the excavation hole W and the lower pipe, there is a shielding layer formed by filling at least one kind of shielding material, and the inflow of contaminants from the surface layer into the well is blocked due to this shielding layer, which will be described later. In addition, although not shown, a water sampling valve and a pressure gauge for testing groundwater quality may be installed inside the sealed upper protection hole or on the outer surface of the upper protection hole in the outer case.

The pumping pipe (P1) inserted into the inner well material passes through the inner surface of the lower pipe, and the upper part is exposed through the upper cover 112 (or side) of the inner upper protection hole and is connected to the water tank line, A meter 210 is installed in the extended portion, FIG. 2A is a plan view of the sealed upper protection hole, the meter box 200 is disposed adjacent to the outer case 102, and the pumping pipe is connected from the outer case to the meter box. Several unions (U1, U2, U3) are combined in the middle of the pumping pipe, so it is possible to separate and dismantle the pumping pipe in each case. Although the planar shape of the outer case is shown in a circular shape, it may be formed in an oval or rectangular structure.

In addition, a corrugated pipe (C) is coupled between the pumping pipe and the meter exposed through the inner upper protection hole. If, for example, a stainless steel corrugated pipe is used as a piping connection part between the outer case of the sealed upper protection hole and the meter box, angle adjustment or vertical height adjustment is possible within a certain range. Even if there is a step difference of the pump, it is easy to connect the pumping pipe, so the installation convenience of the entire product can be increased. This corrugated pipe not only adjusts the height difference or inclination between the pumping pipe and the meter box, but also provides a function to compensate for the decrease in the thickness of the rubber packing when the union is connected to the pumping pipe. After connecting the corrugated pipe between the upper protection hole and the meter box, it is possible to protect the corrugated pipe from external impact by putting fast-hardening cement around the corrugated pipe and curing it.

A discharge port 220, a gate valve 222, etc. may be added to the pumping pipe of the meter box in addition to the meter for discharging polluted water in the well underground water, and a drain hole 230 is formed at the bottom of the meter box and the upper cover (Fig. 1) 202) is provided with a transparent window. The bottom drain hole may be formed to drain the condensed water generated by the temperature difference inside the meter box, and a filter such as a stainless steel mesh may be added thereon. The transparent window on the cover of the meter box serves as a passage through which the instructions of the meter can be visually checked, and a part of the meter box such as the cover can be formed of a different material to enable wireless communication of the meter measurement results.

In the present invention, the outer case protecting the upper protection hole and the meter box protecting the meter may be configured as a single case. Figure 2b shows another embodiment of the sealed upper protection hole, the upper protection hole, the pumping pipe and the meter are arranged in one case (102). Such an arrangement structure can reduce the overall product size, so it is suitable for small wells or places where it is difficult to install an upper protection hole geographically.

In order to form a shielding layer for blocking the surface contamination source of the groundwater well inside the well excavation surface, the above-mentioned lower pipe is inserted inside or outside the internal well material (PVC) already installed inside the groundwater well before installing the inner upper protection hole can be installed. The lower pipe may be formed into a cylindrical shape by, for example, bending a flat stainless steel panel and then welding the seam. The lower pipe can be cut to any length and installed inside the groundwater well, and the flange for coupling the outer case is attached to the upper part, and the lower surface or the outer surface of the lower part prevents the shielding material from flowing down when injecting the shielding material. It can be combined by adding a blocking part of a soft or hard material.

3A and 3B are perspective views illustrating a lower pipe for forming a shielding layer. The embodiment of Fig. 3a is a lower pipe 120 for low depth that is inserted into the pipe well by about 1 to 2 m, and a flange 121 is coupled to the upper outer peripheral surface of the lower pipe, and this flange is on the lower bottom plate of the outer case. A plurality of bolt fastening holes 122 are formed, and a through hole 123 through which a hose for injecting a shielding material can be inserted into the bolt fastening hole is formed. The arrow indicated by the dotted line in the drawing schematically represents the path through which the hose is injected through the through hole of the flange. A portion below the flange of the lower pipe is a bent pipe 124 , and a blocking portion 125 for preventing the shielding material from falling is integrally formed or coupled to the lower portion of the outer peripheral surface by welding or the like. The blocking portion and the outer peripheral surface of the pipe provide a lower surface and a side surface on which the shielding material is laminated through a hose injected into the through hole. The blocking part is, for example, a funnel-shaped ring-shaped structure with a cross section, and may be made of rubber, silicone, soft plastic, or the like, and coupled to the outer peripheral surface of the lower end of the pipe.

The shielding layer formed inside the excavation surface of the groundwater well surface layer is formed by stacking the shielding material filled through the hole of the flange, and after the formation of the shielding layer is completed, the hole of the flange may be sealed by inserting a fastening means. To this end, the through hole of the flange may be formed with a screw fastening part on the inner surface, and when the shielding material injection is completed, the through hole can be filled and sealed by fastening a coupling means such as a bolt to the through hole in a state in which the hose is cut and included in the shielding layer.

3b is a lower pipe for high depth, which can be effectively used when inserted into the well in the range of about 3 to 4 m or more, and a plurality of extension bars formed linearly and long between the flange 121 and the pipe 124 ( 126) is connected to increase the overall vertical length. In this case, the shielding material injection hose (h) may pass through the flange, but it is also possible to inject the shielding material into the blocking part 125 of the outer peripheral surface of the pipe through the space between the extension bars in the flange inner space or outside the flange. In the case of using a lower pipe for high depth, it is possible to provide another side in which the outer circumferential surface of the inner well material is formed as a shielding layer together with the inner surface of the excavation surface of the well.

The grouting process of the surface layer inside the well through the injection of the shielding material can be performed in the following order. First, insert the lower pipe inside or outside the inner well material inside the well before coupling to the lower opening of the outer case. Then, the hose is injected into the through hole formed in the flange of the lower pipe, and the grouting material is injected through the hose. Epoxy or cement can be used as the grouting material, and the shielding layer can be formed in two or more layers by sequentially injecting epoxy and cement. In the case of cement, it is preferable to use fast-hardening cement. When the thread is formed in the through hole, after the shielding material injection is completed, a fastening means such as a bolt is bound to the through hole to completely seal the through hole. When the grouting and flange through hole sealing are completed, the outer case is combined with the lower pipe, and the upper protective hole is installed in the outer case.

4 is a schematic view showing the shielding layer inside the excavation surface of the surface layer of the groundwater well. The inner well material (P) is inserted into the well excavated surface (W) and arranged, and the lower pipe is arranged on the outer peripheral surface thereof. After installing the lower pipe, epoxy can be injected into the well from the ground using an injection device as the primary pollutant barrier. After a sufficient curing time has progressed, the space that can flow from the ground layer can be blocked by injecting super-velocity cement as a secondary pollutant blocking agent. As a result of sequentially injecting two types of shielding materials through the through hole 123 of the flange, the first shielding layer 130A and the second shielding layer 130B are formed in the space between the excavation surface and the outer peripheral surface of the pipe 124 . Since the shielding layer is formed near the surface layer inside the well, it is possible to effectively prevent contamination of the groundwater of the well from various contaminants in the vicinity of the surface. When the stratum is a rock layer, it is difficult to excavate for installation of the upper protection hole, so it is difficult to form a pollution blocking layer through excavation. The shielding layer inside the well excavation surface of the present invention can easily inject a shielding material during the installation process of the upper protection hole, and by forming two or more shielding layers in a short time, it is the source of the inflow of polluted water and pollutants from the surface layer from around the groundwater well. can be blocked with

Such a shielding layer can be effectively applied to various wells with different excavation diameters. Since the groundwater excavation diameter varies according to the site, such as 150A, 200A, 250A, etc., if the lower pipe is pre-welded and integrated at the bottom of the outer case, it may be difficult to form a shielding layer during the construction of the upper protection work, and the product as a whole to fit the bore hole diameter Inconvenience of having to re-manufacture may occur. In the case of the underground water well upper protection hole of the present invention, the lower pipe coupled to the bottom plate of the outer case is bent and welded to the appropriately cut stainless panel to form different pipe diameters, and the outer case and bolt are selected according to the conditions of the well site allowed to be contracted. 5 is a schematic view showing a lower pipe coupled to the outer case, and shows that lower pipes 120A and 120B having different diameters are selected as needed and coupled to the bottom plate 106 of the outer case 102 . In this way, the outer case is standardized in one single shape, and the lower pipe is manufactured with a different diameter of the bent pipe, and then selected and used according to the drilling diameter of the groundwater well, so that it is possible to effectively respond to the on-site situation of the groundwater well.

6 shows the cover 112 of the inner upper protection hole, in particular, the upper plate of the cover is shown. A through hole is formed in the center of the cover, and the other end of the pumping pipe (P1) inserted into the well is exposed through this and extends to the water tank line. The upper plate of the upper protection hole cover is fixed to the lower plate coupled to the upper end of the upper protection hole pipe in the form of a flange by means of fastening such as bolts. do. The upper and lower plates of the cover can be sealed and fixed through the bolt fastening hole, and the pin fixing groove is a space through which the pin structure welded to the lower plate of the cover passes. By forming such that there is a certain amount of play, it is possible to prevent left and right movement while fixing the union direction of the pumping pipe to the correct position. In addition, a hook-shaped latch 115 may be coupled to the cover upper plate to lift the upper plate, and a wire passage hole 116, which is an inlet space for electric wires supplying power to an underwater motor disposed inside the well, may be provided. have.

Pumping pipes, underwater motors, etc. inserted into the underground water wells are heavy and the insertion position is deep, so it may not be easy for the cover of the upper protection hole to support the weight. In order to support the weight of the pumping pipe, a support (S) can be installed on the upper side of the pumping pipe (P1) as shown in Figs. can be stably supported.

As described above, the pumping pipe exposed from the upper protection hole and extending to the meter box is mediated by a plurality of unions and corrugated pipes. In the embodiment of Figure 1, the first union (U1) is coupled to the pumping pipe exposed to the upper part of the upper protection hole in the outer case, and the second union ( U2) and the third union (U3) are combined.

A union is a piping accessory material that usually interconnects pipes of the same diameter, and serves as a coupling in parts that require disassembly and assembly to facilitate maintenance and replacement of pipes and parts in the future. The union (U) is generally configured as a set by coupling a pair of pipe coupling thread parts (UC) and a nut part (UN) coupling the two threads, as shown in FIG. this is inserted The coupling nut of the union usually has a hexagonal or octagonal outer circumferential surface, and as shown in FIG. 8b, a tool such as a pipe wrench (T1) is coupled to the coupling nut (UN) outer circumferential surface and the tool is rotated to attach the union to the pipe. combine or disintegrate. The torque applied to the union through the tool is equal to the magnitude of the force transmitted by the user to the tool multiplied by the distance of the tool handle from the axis of rotation (union). It can proceed smoothly only when the arc-shaped rotation distance is guaranteed.

If the thickness of the rubber ring of the union decreases, leakage of the pumping pipe may occur. With the union connected to each part of the pumping pipe that is exposed from the well to the outside through the upper protection hole and connected to the meter, it is inevitable to reduce the size of the meter box due to problems with the installation space of the underground water well or related parts, In this case, the rotation distance of the tool is limited for joining or disassembling the union (see T1 and T2 in FIG. 8B ). In addition, when the size of the weighing box is small, there may be a problem that the tool cannot be firmly engaged with the outer circumferential surface of the coupling nut due to the square structure of the coupling nut of the union. In such a state, it may be impossible to combine or disassemble the union even if various tools are used. can be separated from or bound to. Such union bonding or separation work significantly lowers work efficiency in underground water well construction, and as a result, may be a factor in increasing the construction cost.

In the case of using union parts to increase the efficiency of upper protection work in underground water well construction and to simplify the combined structure of the overall system, it is necessary to develop a new type of union and related tools instead of parts with an outer peripheral surface of the existing polygonal structure. . In the present invention, while improving the union structure, a new tool that can be easily coupled to the outer circumferential surface of the union to enable the improved union engagement and release operation to apply torque by rotation is proposed.

Figure 9a shows the union improvement structure, the outer peripheral surface shape of the union coupling nut is formed in a circular shape instead of a hexagon, and a plurality of coupling grooves (UG) are formed on the outer peripheral surface of the circular coupling nut. That is, the union includes a pipe coupling thread (UC) and a circular coupling nut (UN), and is coupled with a tool by forming a plurality of locking grooves (UG) on the outer peripheral surface of the circular coupling nut perpendicular to the direction of the circle center. On the other hand, by selecting desired grooves from among a plurality of locking grooves and combining them with a tool, the rotation of the tool is relatively free, and the rotation angle is larger than that of the existing pipe wrench and hexagonal cap type coupling nut, so that the union can be bound and The release operation is facilitated. A circular coupling nut with a locking groove can be manufactured by casting molding or CNC machining.

In order to be suitable for such a new union structure, the present invention newly proposes a tool for union binding and releasing. Referring to FIG. 9B , as a tool 300 in the form of a hook, a handle extends downward, and a plurality of fastening ends 310 protruding apart from each other at a predetermined angle are formed therein. The plurality of fastening ends are respectively coupled to the locking grooves of the circular coupling nut to directly transmit the rotational force when the tool is rotated, and the degree of freedom of the coupling angle of the tool can be improved. Using these improved unions and tools, it is possible to easily connect and disconnect the pipe line and the meter, and even if the size of the meter box is small and the internal space is narrow, the installation and management of the pumping pipe can be easily performed.

The improved upper protection hole facility of the present invention is suitable for compactly manufacturing and simplifying parts such as a sealed protection hole and meter of an underground water well, and it is possible to integrate or separate installation of the protection hole and the meter box, as well as to geographically It is easy to cope with human difficulties. In addition, when replacing the meter, it can be easily replaced in a small space, so the upper protection equipment can be installed even in a narrow space.

Although the present invention has been exemplarily described through preferred embodiments above, the present invention is not limited to such specific embodiments, and various forms within the scope of the technical idea presented in the present invention, specifically, the claims may be modified, changed, or improved.

100: sealed upper protection hole 102: outer case
103: bolt fastener 104: cover
106: bottom plate 110: (inside) upper protection hole
112: cover 113: bolt fastener
114: pin fixing groove 115: hook-type clasp
116: wire passage 120: lower pipe
121: flange 122: bolt fastener
123: hose injection hole 124: bending pipe
125: blocking part 126: extension bar
130: shielding layer 200: weighing box
202: cover 203: bolt hole
210: meter 220: outlet
222: gate valve 230: drain
300: tool 310: fastening end
C: Corrugated pipe G: Earth surface
h: Shielding material injection hose P: Internal well material
P1: Pumping pipe S: Support
U1, U2, U3: Union UN: Coupling nut
UG: Locking groove W: Well excavation surface

Claims (5)

Internal upper protection hole installed on the upper part of the internal well material that is inserted into the drilling hole of the underground water well,
Protecting the inner upper protective hole from the outside, the lower portion is provided with an opening, the upper protective hole outer case including a cover,
A lower pipe coupled to the inner surface of the lower opening of the outer case and disposed to be inserted into the excavation hole;
A flange provided on the upper end of the lower pipe and coupled to the lower part of the outer case, the flange having a through hole through which a hose for injecting a shielding material can be inserted;
A pumping pipe that is inserted into the inner well material and the upper part is exposed through the inner upper protection hole and is connected to the meter;
It is coupled or formed on the lower portion of the outer circumferential surface of the lower pipe to include a blocking portion for preventing the shielding material from falling
Sealed upper protection hole for underground water wells
According to claim 1,
A sealed upper protection hole for an underground water well comprising a shielding layer formed of at least one or more shielding materials that are filled in the space between the inner surface of the excavation hole and the lower pipe to block the inflow of contaminants from the surface layer.
3. The method of claim 2,
The shielding layer is formed by laminating a shielding material to be filled through the through hole of the flange, and after the shielding layer is formed, the through hole of the flange is closed by inserting a fastening means.
According to claim 1,
A plurality of unions are interposed at both ends of the meter connected to the pumping pipe exposed through the internal upper protection hole as a pipe coupling part, and the union includes a threaded part for pipe coupling and a circular coupling nut coupled to the outer peripheral surface of the threaded part, A sealed upper protection hole for an underground water well, characterized in that a plurality of locking grooves are formed on the outer circumferential surface of the circular coupling nut perpendicular to the center direction.
According to claim 1,
A closed upper protection hole for an underground water well, characterized in that a corrugated pipe is coupled between the pumping pipe and the meter exposed through the inner upper protection hole.

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