KR100981985B1 - Underground water well cover with locking device for flowmeter attach and remove easy - Google Patents

Abstract

PURPOSE: A subsurface water top sealing device in which flow meter attaching/detaching facilitates is provided to enable a user to conveniently assemble and disassemble and to reduce cost for maintenance and repair. CONSTITUTION: A subsurface water top sealing device comprises a manhole portion(10), a flow meter(20), a influent and effluent water case(30) and a pressurization device. The manhole portion is composed of a manhole box and a manhole cover. The flow meter is composed of a water meter, an influent water connection pipe(22), an effluent water connection pipe(23). The influent and effluent water case is integrally combined with the flow meter. The influent and effluent water case induces so that the subsurface water passes through the flow meter. The pressurization device pressurizes the sidewall of the influent and effluent water case.

Description

UNDERGROUND WATER WELL COVER WITH LOCKING DEVICE FOR FLOWMETER ATTACH AND REMOVE EASY}

The present invention relates to an upper groundwater sealing device that is easily removable from a flowmeter, and more particularly, to a sealing device for protecting a flowmeter or various pipes installed to pump groundwater, without having to greatly enlarge the cross section of the groundwater well. Easy to install and dismantle in the form of a small manhole at home, etc., and it is connected to the groundwater pumping pipe buried underground to install the groundwater smoothly so that the groundwater can be pumped to the ground. It relates to a groundwater upper sealing device that is easily removable.

In general, the groundwater intake facility excavates the rock from the surface until it penetrates the veins of the groundwater with an excavator, installs an underwater pump inside, transfers the groundwater using a water pipe connected to the underwater pump, and stores it as a water tank. In the past, the upper periphery of the wells of the groundwater wells above the ground was installed, and the inflow of contaminated surface water was prevented or a cover device was installed to prevent contaminants from entering the groundwater wells.

That is, the conventional groundwater upper protective seal device must be provided with a well having a large cross section and its inlet in order to connect and dismantle the flow meter and a plurality of pipes attached to the well for casing buried underground, and installed inside the well In order to perform the work, a large number of manpower was required in this process, and it was troublesome to work closely with layers or multiple materials for watertightness.

In addition, a water meter for supplying pumped water is connected to a water meter for reading the amount of tap water used, and the water tap is dug over a certain depth to prevent freezing and then buried in the ground. Therefore, in the related art, a water meter should also be buried in the ground, but in order to easily read it from the outside, the water meter protector may be buried in the ground, and the water meter may be installed in the water meter protector. At this time, the water meter is placed in a position higher than the depth of the tap faucet buried in the ground for the convenience of the meter reading requires an inlet and outlet pipe connecting the water meter and the faucet, the connection pipe surrounding the inlet and outlet pipe It is equipped with a water meter will be coupled to the lower protective tube. The water meter protective tube as described above is formed by the angle pipe between the water supply pipe and the water supply pipe of the water meter to form a pipe connection structure. In addition, the lower part of the protective tube is formed with an extension of the bottom plate is installed inside the pipe insulation material to prevent the freezing of the water inlet pipe and the water supply pipe can be fixed position.

However, in such a conventional water meter protector structure, the connection between the water meter and the inner pipe of the protector is connected by a screw formed in the meter and the pipe, and the position of the meter is located at the bottom of the protector for the purpose of keeping warm, and thus the narrow and deep position. Since the connection to the seam must be performed using a tool such as a pipe wrench, the work is cumbersome and the work efficiency of the installation is reduced.

The present invention has been made to solve the above problems, the flow meter such as a water meter and the pipe connected to it has a coupling structure that is integrated and simplified to facilitate the replacement and installation work of the meter, the inlet and outlet through Excavating water pipes with a structure that can completely prevent leaks to prevent freezing caused by groundwater infiltration, and to easily match the location of the inlet and outlet for the inflow of groundwater into the wells of the wells It is to provide a groundwater upper easy to remove the flow meter to facilitate the replacement and coupling of the meter and the protective casing without having to.

In order to achieve the above object, the flowmeter is easily attached to the groundwater upper closure device according to the present invention, the casing connection pipe of the hollow tube type connected to the upper end of the casing for charging the water pump through the groundwater pumping pipe is provided A manhole box embedded in the ground and a manhole box embedded in the ground are respectively provided with a discharge port for discharging the groundwater and a water pump wire withdrawal on one side thereof, and a manhole flange-coupled from an upper portion of the manhole box to seal the upper part of the manhole box. In the groundwater upper sealing device provided with a manhole portion composed of a cover, the water meter is provided with a check valve on one side, each of the fixing brackets having a plurality of fastening holes are formed at the lower end to each of both ends of the water meter Flow meter with inlet and outlet connection pipes connected to it, and a partition wall is installed inside A subspace is divided into an inflow space portion and an outlet space portion, and a bottom portion of the inflow space portion is provided with a ground water inflow pipe that is protruded and opened in a hollow park tubular shape and connected to the groundwater pumping pipe, and one side of the outlet space portion is an outlet of the manhole box. Groundwater discharge holes are provided in communication with each other, and an upper end of each of the inlet space and the outlet space is provided with an inlet connector and an outlet connector for communicating with each of the inlet connector and the outlet connector. A plurality of long grooves corresponding to the fastening holes of the fixing bracket are formed at an upper end thereof, and includes an entrance and exit case provided with a support bracket which is tightly coupled with the fixing bracket.

In addition, the groundwater upper sealing device easy to remove the flowmeter according to the present invention, the discharge port and the groundwater discharge hole is formed in each of the distal end connected to each other tapered so that the groundwater discharge hole is connected to each other in the form of being inserted into the discharge port. The inner wall portion of the other side of the manhole box provided with the discharge port is provided with a pressurizing means for pressurizing the sidewall of the entrance / exit case so that the groundwater discharge hole is tightly connected to the discharge port. The screw tab formed to a predetermined depth on the inner sidewall end of the manhole box in the other direction and the locking bolt is released or locked to the screw tab, characterized in that consisting of a pressing bolt for pressing the entry and exit case.

In addition, the groundwater upper sealing device easy to remove the flowmeter according to the present invention, the manhole cover is provided with an air distribution hole at one end, the air distribution hole is provided with a relief valve for blocking the surface water flow into the groundwater layer It features.

In addition, the groundwater upper sealing device easy to remove the flowmeter according to the present invention, characterized in that the one end of the water discharge connection pipe is provided with a hose connector is provided with a pressure gauge and a valve.

In addition, the groundwater upper sealing device easy to remove the flowmeter according to the present invention, the manhole box is opposed to each other at both sides of the inner wall of the manhole box so that both ends of the longitudinal direction of the entry and exit case is guided "c" A pair of guide members having a shape is provided, and the entry / exit case is provided with a handle ring hinged at both ends of the entry / exit case.

By the above configuration, the upper groundwater upper device for easy removal of a flowmeter according to the present invention has a coupling structure that is simplified by integrating a flowmeter such as a water meter and a pipe connected thereto so that the replacement and installation work of the meter is easy. In addition, by newly suggesting a structure that can completely block the leakage of the inlet and outlet penetration, it is possible to prevent freezing caused by groundwater infiltration, and to easily match the position of the inlet and outlet for the groundwater to the well-welled well casing. In this configuration, it is possible to easily replace and combine the meter and the protective container without digging the water pipe.

Hereinafter, with reference to the embodiment shown in the drawings will be described in more detail the upper ground water sealing device easy to remove the flow meter according to the present invention.

1 is an exploded perspective view illustrating a groundwater upper sealing device that is easy to remove the flowmeter according to an embodiment of the present invention, Figure 2 is a groundwater upper well is a groundwater upper sealing device easy to remove the flowmeter according to an embodiment of the present invention Figure 3 is a cross-sectional view showing a state installed in the state, Figure 3 is a cross-sectional view showing a part of the configuration of the upper groundwater sealing device easy to remove the flowmeter in accordance with an embodiment of the present invention, Figure 4 according to an embodiment of the present invention Flow meter is a perspective view showing a state in which the flow meter and the entrance and exit case of the groundwater upper sealing device is easily removable.

Referring to the drawings, the groundwater upper sealing device easy to remove the flowmeter according to an embodiment of the present invention, the manhole portion 10, the flowmeter 20, the entrance and exit case 30, the pressurizing means 40 It is configured to include.

The manhole portion 10 is fastened to the upper end of the casing (10 ') buried in contact with the groundwater layer is integrally coupled, to prevent freezing of the flow meter 20 installed therein and to prevent groundwater contamination. It is provided for. The manhole part 10 includes a manhole box 11 embedded in a groundwater well and a manhole cover 12 covering an upper portion of the manhole box 12. The upper flange of the manhole box 11 is provided with a lower flange 111 is formed with a plurality of fastening holes (111a), the edge of the manhole cover 12 to the fastening hole (111a) of the lower flange 111 An upper flange 121 having a plurality of fastening holes 121a formed therein is provided such that the manhole box 11 and the manhole cover 12 may be flanged to each other.

The manhole box 11 is provided with a casing connecting pipe 112 of the hollow tube for connecting to the upper end of the tube for casing (10 ') at the bottom. The casing connecting pipe 112 is fixed to the outer side of the fixing band (10a ') is wrapped and bolted to the outside in a state coupled to the pipe for the pipe 10'. In addition, one side of the manhole box 11 is provided with a discharge port 113 for discharging groundwater and a wire outlet 114 for drawing the wire of the underwater pump WP charged through the groundwater pumping pipe 100. . The discharge port 113 is formed with a screw thread in the distal end portion is protruded to the outside of one side of the manhole box (11). The discharge port 113 is screwed together with the ground water pumping hose 113 'extending to the ground in order to pump ground water, and the packing member P is inserted into and tightly connected therebetween.

The manhole cover 12 is a heat insulating material such as styrofoam in order to prevent the flow pipe 20 and the connection pipes of various inlet and outlet ports installed inside the manhole box 11 to be leaked by the freezing cold Is integrally provided to have a predetermined depth at the bottom of the manhole cover 12. In addition, the manhole cover 12 is provided with a flow meter reading needle 123 to easily check the scale of the water meter (21) in the manhole box (11). The flow meter metering hole 123 is composed of a central through hole 123a vertically penetrated in the center portion of the manhole cover 12, and a metering hole cover 123b for sealing the upper portion of the central through hole 123a. The central through hole 123a penetrates up to the central portion of the thermal insulation material 122 provided at the bottom of the manhole cover 12 to allow inspection of the meter. In addition, the central through-hole 123a is formed with a protruding jaw 123a 'protruded to the upper portion of the manhole cover 12 so that the metering cap lid 123b is caught by the protruding jaw 123a'. do. In addition, the fixing piece 123b 'is provided at both ends of the meter reading cover 123b, and the fastening hole 123b "is formed at the upper end of the manhole cover 12 to correspond to the fixing piece 123b'. The fixing piece 123b 'is fastened by the bolt B. Therefore, the manhole cover 12 of the present invention can be opened and closed by simply opening and closing the meter cap 123b. It is made easy to check the meter, the internal insulation 122 made of styrofoam, etc. are integrally provided so as not to be exposed to the outside to reduce the risk of damage.

On the other hand, one end of the manhole cover 12 is provided with an air distribution hole (12a), the air distribution hole (12a) is characterized in that the relief valve 12 'is installed to block the inflow of surface water into the groundwater layer It is done.

In general, a groundwater pump (WP) is put in the groundwater well to raise groundwater. At this time, an air layer is formed inside the groundwater well, that is, above the groundwater surface, and the air layer generates pressure inside the well by the gas generated in the groundwater well. Therefore, in the present invention, the air distribution hole 12a penetrated in the vertical direction to extend from one end of the manhole cover 12 to the lower end of the heat insulating material 122 is provided in the groundwater layer of the manhole cover 12. It is to allow ventilation to the outside. In addition, since the air distribution hole 12a is exposed to the outside in an open state, the relief valve 12 'is installed to block rainwater or surface water from overflowing into the groundwater well.

Referring to FIG. 4, the relief valve 12 ′ is positioned at an upper portion of the air flow hole 12 a and is connected to the manhole cover 12 by a hollow bolt 12 ″ penetrated therein. 12'a and a case cover 12'b for sealing an upper portion of the ventilation case 12'a are coupled to the ventilation case 12'a. 12'a1 is provided at one side, and an air passage extending from the air through hole 12a to the through hole 12'a1 is formed in the vent case 12'a. On the lower side where the pores 12'a1 are provided, a fluid inlet 12'a2 is provided in communication with the aeration passage inside the ventilation case 12'a, while the fluid inlet 12'a2 and the aeration passage are provided. The buoyancy body 12'c having an upper end inclined is installed at the inlet portion through which the buoyant body communicates with the buoyancy body 12'c. When the vent hole 12'a1 is seated in an open state at a lower portion of the air passage, and the surface water flows into the fluid outlet 12'a2 above a predetermined pressure, the buoyancy body 12'c Is floated upward along the air passage by buoyancy, and is caught by the inclined jaw 12'a3 having a shape corresponding to the upper end of the buoyancy body 12'c at the upper portion of the air passage to seal the air passage. This prevents surface water from entering the aeration.

The flow meter 20 has a water meter 21 in which a check valve 21a is installed at one side, and fixed brackets 221 and 231 having a plurality of fastening holes 221a and 231a at lower ends thereof, respectively. It consists of an inlet connecting pipe 22 and the outlet connecting pipe 23 connected to each of both ends of the 21. The water meter 21 is installed for periodic water meter reading, the meter is installed in the center portion and the inlet and outlet of the pipe tube form at both ends thereof, the built-in blocking plate in the direction of the outlet to prevent backflow of water The check valve 21a is installed so that accurate measurement by the instantaneous backflow of water at the time of indexing is possible, and groundwater does not enter in the reverse direction, so it is provided to prevent freezing during the winter season. In addition, the water supply connection pipe 22 is connected to the water inlet direction of the water meter 21, the water supply connection pipe 23 is to be connected to the water outlet direction of the water meter (21). The inlet connector 22 and the outlet connector 23 will be described in detail with the configuration of the inlet and outlet case 30 below.

The inflow and outflow case 30 guides the groundwater to pass through the flow meter 20 so that the flow rate of the groundwater pumped into the pumping pipe 100 by the submersible pump WP can be confirmed by the water meter 21. It is to. Thus, the entry and exit case 30 is configured to be integrally coupled with the flow meter 20. The entry and exit case 30 has a partition 301 is installed therein so that the internal space is divided into the inlet space 31 and the outlet space 32. In addition, the bottom portion of the water inlet space 31 is provided with a groundwater inlet pipe 302 protruding and opening in a hollow park cylinder connected to the groundwater pumping pipe 100. The groundwater inflow pipe 302 is tightly connected between the groundwater pumping pipe 100 via a rubber packing (not shown) and the like to allow the groundwater pumped into the inflow space 31 to be introduced. In addition, one side of the discharge space 32 is provided with a groundwater discharge hole 303 connected to the discharge port 113 formed to protrude to the outside of the manhole box 11.

On the other hand, in the present invention, the discharge port 113 and the groundwater discharge hole 303 is formed in each of the distal ends connected to each other is tapered so that the groundwater discharge hole 303 is inserted into the discharge port 113 to be engaged with each other. It is characterized by.

Referring to the drawings, the groundwater discharge hole 303 is formed so that the body of the portion provided with the discharge space 32 of the water intake case 30 is tapered so that the inner diameter becomes narrower toward the discharge port 113 direction. The end portion thereof is rubberly sealed (303a) is interposed between the watertight in the form of being inserted into the discharge port 113. Therefore, the discharge port 113 is preferably formed to be tapered to protrude outwardly of the manhole box 11 to be in close contact with the groundwater discharge hole 303.

In addition, the upper portion of the inlet space 31 is provided with an inlet connector 304 penetrated in the vertical direction in order to communicate with the inlet connector 22. In the same way, the upper portion of the water extraction space portion 32 penetrates upwards and downwards so that the groundwater guided to the water acquisition space portion 31 passes through the flow meter 20 and enters the water extraction space portion 32. The water outlet connector 305 is provided. On the other hand, the upper end of the inlet connector 304 and the outlet connector 305 support bracket (221) at a position corresponding to the fixing brackets (221,231) formed at the lower end of the inlet connector (22) and the outlet connector (23) 304a and 305a are provided. The support brackets 304a and 305a have a plurality of long grooves 304a 'and 305a' corresponding to the plurality of fastening holes 221a formed in the fixing brackets 221 and 231, respectively. The long grooves 304a 'and 305a' may be length-adjusted according to the clearance generated during the pipe connection between the water supply meter 21 and the water inlet connection pipe 22 and the water outlet connection pipe 23 connected to both sides thereof. In the configuration formed, the fixing brackets 221 and 231 and the support brackets 304a and 305a can be tightly coupled to each other.

On the other hand, one end of the water outlet connection pipe 23 is characterized in that the hose connector 23 'is provided with a pressure gauge (23a') and the opening and closing valve (23b ') is provided.

The hose connector 23 'is to allow the groundwater to be pumped in the middle for the water meter reading, etc., which is periodically made to evaluate the groundwater pollution degree and water quality grade. One end of the hose connector (23 ') is provided with a pressure gauge (23a') to enable the pressure-tightness test of the water meter reading, and connects a separate hose to the outlet of the hose connector (23 ') the opening and closing valve (23b') By controlling the opening and closing of the groundwater can be collected. In addition, a pressure reducing valve 22 ′ is installed at one end of the water inlet pipe 22. Referring to the drawings, the pressure reducing valve 22 'is used for boiler protection and water pressure control because it is easy to adjust the pressure when using the boiler, which is advantageous for water flow and water hammer reduction when water meter pressure is adjusted. In general, the groundwater pumped from the underground becomes higher than the proper pressure as it goes down to the lower layer. The high water pressure increases the water supply in the pipe and flows a lot, causing vortices in the deformed part of the pipe, causing water and sound. Therefore, the connection line of the flow meter 20 of the present invention uses the pressure reducing valve 22 'to prevent the flow of water and the occurrence of vibration and to solve the flow rate imbalance.

By the configuration as described above, the inflow and outflow case 30 allows the groundwater guided to the inflow space portion 31 to allow the groundwater to pass through the flowmeter 20 through the inflow connection port 304. Passed through, the groundwater is guided to the water discharge space 32 through the water outlet connector 305 can be discharged to the outside of the manhole box 11 through the ground water discharge hole 303. Accordingly, the flow meter 20 and the inlet / outlet case 30 are detachably installed inside the manhole box 11 to be connected to the pumping pipe 100 in a state in which they are integrally coupled to each other.

On the other hand, the manhole box 11 is opposed to each other on both sides of the inner wall of the manhole box 11 to guide both ends in the longitudinal direction of the entry and exit case 30 has a pair of cross-section having a "c" shape It is characterized in that the guide member (11 ') is provided. In addition, the entry and exit case 30, the handle ring 30 'is hinged at both ends of the outer side of the entry and exit case 30 is provided.

The configuration of the guide member 11 'and the handle ring 30' according to an embodiment of the present invention are difficult to secure the field of view and use of the tool caused when replacing the meter at a position deep inside such as a conventional protective container. In order to solve the present invention is a configuration to be easily removable inside the manhole box (11). Referring to the drawings, the flow meter 20 and the inlet / outlet case 30 are integrally connected by various pipes connected to each other, and the pumping pipe 100 exposed to the upper portion of the groundwater well inside the manhole box 11. The groundwater inlet pipe 302 is to be seated to be connected to. At this time, the guide member 11 ′ is formed in a “c” shape on the sidewall of the manhole box 11 so that the groundwater discharge hole 303 and the other sidewall portion of the entry / exit case 30 are guided. The manhole box 11 can be stably seated on the upper portion of the buffer member (S) provided in the bottom portion. In addition, the handle ring 30 ′ provided at both outer ends of the entry and exit case 30 is easily gripped when the entry and exit case 30 is installed and lifted at a deep position inside the manhole box 11. To do it.

On the other hand, the inner wall portion of the other side of the manhole box 11 is provided with a side wall of the intake case 30 so that the groundwater discharge hole 303 is watertightly connected to the discharge port 113 A press means 40 is provided for pressurizing, wherein the press means 40 is composed of a screw tab 41 and a press bolt 42 that is locked or released to the screw tab 41.

The pressurizing means 40 is, in order to install the inlet / outlet case 30 in which the flowmeter 20 is integrally installed inside the manhole box 11, first, the groundwater inlet pipe to the pumping pipe 100. Let 302 be connected. Next, the groundwater discharge hole 303, which has a tapered end portion, is inserted into the discharge hole 113 protruding from the manhole box 11 to the outside thereof and is fitted with each other. In this case, since the inlet / outlet case 30 is simply connected to the outlet port 113, the outlet port 30 is pressurized in the other direction in which the outlet port 113 is provided to maintain the watertightness accordingly. It is to install the pressing means (40).

Thus, the pressing means 40 is formed with a side wall extension portion 40a in which the inner sidewall of the manhole box 11 in the other direction in which the discharge hole 113 is provided extends a predetermined protruding outward of the manhole box 11, The thread tab 41 of a predetermined depth is formed therein. In addition, the side wall extending portion 40a is provided with a pressurizing bolt 42 formed with a flat pressing surface on one side of the head, which is locked or loosened to the screw tab 41. Therefore, when installing the water inlet / outlet case 30 of the present invention, the groundwater discharge hole 303 having the rubber packing 303a circumferring the distal end of the groundwater discharge hole 303 is engaged with the discharge port 113. In this state, the pressurizing bolt 42 is loosened by a spanner or the like to press the entry / exit case 30 so that the entry / exit case 30 can be tightly connected to the discharge port 113. In addition, when disassembling the entry and exit case 30, it is possible to easily detach the entry and exit case 30 in the reverse order, the manhole box 11 of the narrow space as before in the repair of various pipes It is possible to construct a top sealing device that is easy to remove the flowmeter that can be easily repaired by lifting and repairing the inflow and outflow case 30 and the flowmeter 20 coupled to the upper part without the need for troublesome work inside. Will be.

The above-mentioned groundwater upper sealing device that is easily detached from the flowmeter described above and illustrated in the drawings is only one embodiment for carrying out the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments which have been improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.

1 is an exploded perspective view showing a groundwater upper sealing device easy to remove the flowmeter according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a state in which the groundwater upper easy closing device is installed in the groundwater wells easy to remove the flowmeter according to an embodiment of the present invention.

Figure 3 is a cross-sectional view showing a part of the configuration of the upper groundwater sealing device easy to remove the flowmeter in accordance with an embodiment of the present invention.

Figure 4 is a perspective view showing a state in which the flow meter and the entry and exit case of the groundwater upper sealing device easily removable in accordance with an embodiment of the present invention.

<Short description of the major reference symbols>

10 manhole

     11 Manhole Box

          111 Lower Flange

                111a fastener

          112 casing connector

          113 outlet

          114 Outlet

     11 'guide member

     12 manhole cover

          121 Upper Flange

                121a fastener

          122 Insulation

          123 flowmeter

     12 'relief valve

20 flow meter

     21 Water Meter

          21a check valve

     22 inlet connector

     23 outlet connector

          221,231 Fixed Bracket

                    221a, 231a fastener

     22 'pressure reducing valve

     23 'hose end connection

30 Entry / Exit Case

     31 Acquisition Space Division

     32 Watershed Space Department

          301 bulkhead

          302 Groundwater Inflow Pipe

          303 Groundwater discharge

          304 Inlet End Connection

          305 Outlet connector

                304a, 305a Support Bracket

                304a ', 305a' long groove

30 'handgrip

40 Pressing means

     41 Thread Tap

     42 Pressing Bolt

B bolt WP submersible pump

P packing member C wire

S buffer member

Claims (5)

There is a casing connecting pipe of the hollow-cylindrical cylinder type connected to the upper end of the casing for the wells to charge the water pump through the ground water pumping pipe, discharge outlet for discharge of groundwater on one side and the wire outlet for the water pump wire is drawn out, respectively In the groundwater upper sealing device provided with a manhole box is provided with a manhole box buried in the ground, and a manhole cover that is flanged from the upper portion of the manhole box to seal the upper part of the manhole box, A water meter having a check valve attached to one side thereof, and a fixed bracket having a plurality of fastening holes is formed at a lower end thereof, and a flow meter having an inlet connection pipe and an outlet connection pipe connected to each of both ends of the water meter; The partition is installed inside, and the inner space is divided into the inlet space and the outlet space, the bottom of the inlet space is provided with a ground water inlet pipe protruding and opening to the ground water pumping pipe is connected to the groundwater pumping pipe, one side of the outlet space The groundwater discharge hole is provided in communication with the discharge port of the manhole box, and the inlet and outlet connector for communicating with each of the inlet connector and the outlet connector at the upper end of each of the inlet space and the outlet space It is provided, each of the upper and lower flowmeters characterized in that the flow meter is characterized in that it comprises a plurality of long grooves corresponding to the fastening hole of the fixing bracket is provided with a support bracket which is coupled to the fixing bracket to be tightly coupled with each other. Easy groundwater top seal. The method of claim 1, The discharge port and the groundwater discharge hole are formed to taper each end portion connected to each other so that the groundwater discharge hole is connected to each other in the form of being inserted into the discharge hole, and the inner wall portion of the other side provided with the discharge hole of the manhole box Pressing means for pressurizing the side wall of the entrance and exit case so that the groundwater discharge hole is tightly connected to the discharge port, the pressing means is a screw tab formed to a predetermined depth at the end of the inner side wall of the manhole box provided with the discharge port and The groundwater upper easy closing device for flow meter detachment, characterized in that consisting of a pressurized bolt for pressurizing the entry and exit case while being locked or loosened to the screw tab. The method according to claim 1 or 2, One end of the manhole cover is provided with an air distribution hole, the air flow hole is easy to remove the upper and lower ground water flow rate device, characterized in that the relief valve is installed to block the inflow of surface water into the groundwater layer. The method according to claim 1 or 2, One end of the water outlet connection pipe is a groundwater upper easy closing device for flow meter, characterized in that the pressure gauge and the hose connector is provided with an opening and closing valve. The method according to claim 1 or 2, The manhole box is provided with a pair of guide members having a cross-section having a “c” shape to face each other on both side walls of the manhole box so that both ends of the entry and exit case in the longitudinal direction are guided. Easily attached to the upper and lower ground water flow rate device, characterized in that the handle ring is connected to the hinge at both ends of the entry and exit case.

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