JP3435528B2 - Pumping equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to groundwater obtained by individually pumping groundwater from a plurality of aquifers existing underground or taking water from a specified aquifer for groundwater treatment and groundwater investigation. The present invention relates to a pumping apparatus suitable for use when pouring water into another aquifer.

[0002]

2. Description of the Related Art Conventionally, in the ground where a plurality of aquifers exist, for example, groundwater contamination investigation, groundwater retention heat energy investigation, groundwater treatment accompanying ground excavation work, etc. A pumping system is used to pump groundwater from the aquifers. In such a pumping device, ground subsidence may occur due to the pumping of groundwater, and the cost of treating the pumped groundwater is also high.Therefore, not only the pumping function but also the groundwater taken from a specified aquifer Some have a water injection function to inject water into other aquifers.

As shown in FIG. 7, for example, when an upper aquifer 2 and a lower aquifer 3 are present above and below an impermeable layer 1 in the ground, the pumping device 4 operates as a lower aquifer. It is installed in a borehole 5 formed so as to reach the layer 3. The water pumping device 4 is installed in the drill hole 5, and the well pipe 8 having the screens 6 and 7 at the positions corresponding to the upper aquifer 2 and the lower aquifer 3 and the impermeable layer 1 are provided. A water impingement zone 9 that is disposed and blocks the upper aquifer 2 and the lower aquifer 3 inside and outside the well pipe 8, and a pumping pipe 11 having a pump 10 at the lower end.
And a pump 12 for sending groundwater from the upper aquifer 2 side toward the lower aquifer 3 side.

In the pumping apparatus 4 having such a structure, the ground water flowing from the upper aquifer 2 into the well pipe 8 is pumped by the pump 12
It is designed to be injected into the lower aquifer 3 side. Also,
When fine particles such as clay or silt contained in the groundwater are caught on the screen 6 to cause clogging, the pump 10 of the water pump 11 is activated, whereby the groundwater is pumped from the water pump 11 to the upper aquifer. The screen 6 is designed to be backwashed by backflowing into the layer 2.

A pumping apparatus 15 shown in FIG. 8 has a pumping pipe 16 having a pump 16a and a tip reaching the upper aquifer 2 in the well pipe 8, and a tip thereof being a lower aquifer 3. And a water injection pipe 17 that reaches the water supply pipe 17, and the pumping pipe 16 and the water injection pipe 17 are connected to the water storage tank 18 provided on the ground.
It is configured to be connected to. Such a pumping device 1
In 5, the pump 16a pumps the groundwater of the upper aquifer 2 into the water storage tank 18 via the pumping pipe 16, and then pours water from the water storage tank 18 into the lower aquifer 3 via the water injection pipe 17. There is.

[0006]

However, the conventional pumping apparatus as described above has the following problems. First, since the pumping device 4 shown in FIG. 7 requires two pumps 12 for pumping water and a pump 10 for backwashing, it goes without saying that the cost is high and the possibility of troubles is high. There is also the problem that maintenance is time-consuming. Further, in the water pumping device 15 shown in FIG. 8, the groundwater of the upper aquifer 2 is once pumped to the water storage tank 18. For this reason, when the groundwater contains, for example, iron ions, it may come into contact with air and iron oxide or iron hydroxide may be deposited, and this groundwater is sent from the water injection pipe 17 to the lower aquifer 3. There is a problem that the deposits cause the screen 7 to be clogged when it is removed. The present invention has been made in consideration of the above points, while suppressing clogging of the screen,
It is an object of the present invention to provide at low cost a pumping device that can perform pumping, or intake and injection of water, and backwashing with a single pump.

[0007]

The invention according to claim 1 is
Multiple aquifers are provided on the ground where there is an impermeable layer between them, and pumping is performed individually from each aquifer, or groundwater taken from a specified aquifer is used in another aquifer. A pumping device for injecting water into the ground, an excavation hole that penetrates the impermeable layer and reaches the aquifer located below the impermeable layer is formed, and in the excavation hole, An impermeable band that partitions the top and bottom to block water at the position of the impermeable layer, and a well pipe equipped with a screen at a position facing each of the aquifers are arranged, and one unit is provided at the bottom of the well pipe. is chamber pump with a pump forming, in the pump chamber, the first tube body formed by attaching a closing valve which is opened and closed by remote control located in pumping or aquifer should intake, A second pipe body with an on-off valve attached to the aquifer to be injected and opened and closed by remote control. Connected, the upper end portion of the second tubular body are configured to be connected to a gate valve provided on the ground side, operation and the open-close valve of said single pump
It is characterized by having a pumping function, a water intake and water injection function, and a backwash function only by the operation of .

According to a second aspect of the present invention, in the pumping apparatus according to the first aspect, the pump chamber is provided with a switching valve that is remotely operated, and the switching valve includes the first pipe body and The second pipe body, the pump, and a communication pipe communicating with the pump chamber are connected to each other.

The invention according to claim 3 is the invention according to claim 1 or 2.
The pumping apparatus described is characterized in that each of the aquifers is equipped with a water pressure gauge.

[0010]

According to the first aspect of the invention, in the excavation hole formed in the ground, a well pipe having a screen is arranged at a position facing each aquifer, and a water shield zone is provided so that the well pipe is A first tube body that partitions an aquifer, forms a pump chamber with a single pump at the bottom of a well pipe, and has an opening / closing valve located in the aquifer to be pumped or withdrawn in the pump chamber And a second pipe body provided with an on-off valve located in the aquifer to be injected, and the upper end portion of the second pipe body was provided on the ground side.
It is configured to be connected to the gate valve, of the one pumps
Only the operation and the operation of the opening / closing valve have a pumping function, a water intake and water injection function, and a backwash function. In the pumping apparatus having such a configuration, the opening / closing valve of the first pipe body and the opening / closing valve of the second pipe body are opened / closed, and the pump in the pump chamber is operated to pump or take in the aquifer. It is possible to feed groundwater of a layer into the pump chamber via the first pipe and then feed it above the ground or into the aquifer to be watered via the second pipe. At this time, when injecting groundwater taken from a predetermined aquifer to other aquifers, the taken groundwater is injected through the pump room at the bottom of the well pipe, and is pumped to the ground to the air. There is no touch.

According to the second aspect of the present invention, the pump chamber is provided with a switching valve, and the switching valve is connected with the first pipe body, the second pipe body, the pump, and the communication pipe communicating with the pump chamber. It was configured to do. With this, by switching the switching valve, the flow of groundwater in the first pipe body and the second pipe body can be freely switched.

According to the third aspect of the invention, a water pressure gauge is provided in each aquifer. As a result, the water pressure inside the well can be grasped and the well can be properly managed.

[0013]

The present invention will be described below with reference to the first to third embodiments shown in the drawings. In the following explanation,
The same components as those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and the description thereof will be omitted.

[First Embodiment] FIG. 1 shows a first embodiment of the water pumping apparatus according to the present invention. Here, first
A pumping apparatus when an upper aquifer (aquifer) 2 and a lower aquifer (aquifer) 3 exist above and below the impermeable layer 1 in the ground will be described.

As shown in FIG. 1, the pumping device 20 is installed in a drill hole 5 formed so as to reach the lower aquifer 3, and corresponds to the upper aquifer 2 and the lower aquifer 3. Well pipe 8 having screens 6 and 7 at the positions, pumping / intake pipe 21, water injection pipe 22 arranged in the well pipe 8, and well pipe 8
And a pump chamber 23 arranged at the bottom of the.

Inside the well pipe 8, a packer (impermeable zone) 24 for isolating the upper aquifer 2 and the lower aquifer 3 is provided at a position corresponding to the impermeable layer 1. Further, on the outer peripheral side of the well pipe 8, the filter material 25 is filled in the positions corresponding to the upper aquifer 2 and the lower aquifer 3, respectively, and in the other positions corresponding to the impermeable layer 1, the upper and lower sides thereof are provided. A water-blocking material (water-blocking band) 26 that blocks the water is filled.

The pumping / intake pipe 21 is connected at its lower end to the pump chamber 23, and at its upper end, a water intake valve (open / close valve) which is opened / closed by remote control at a position corresponding to the upper aquifer 2. 27 are provided. Furthermore, at the position corresponding to the lower aquifer 3, the pumping and intake pipe 21
A cleaning valve 28 that is opened and closed by remote control is provided.

The lower end of the water injection pipe 22 is connected to a pump 29 provided in the pump chamber 23, and the upper end thereof is connected to a gate valve 30 provided on the ground.
Further, the water injection pipe 22 is provided with a water injection valve (open / close valve) 31 which is opened and closed by remote control and a flow meter 32 at a position corresponding to the lower aquifer 3.

Further, in the well pipe 8, the upper aquifer 2,
At the position corresponding to each of the lower aquifer 3, the water pressure gauge 33,
33 are provided.

In the pumping apparatus 20 having such a structure, the intake valve 27 and the gate valve 30 are opened by remote control, and the cleaning valve 28 and the water injection valve 31 are operated.
With the pump closed, by operating the pump 29,
The groundwater of the upper aquifer 2 flows into the well pipe 8 through the filter material 25 and the screen 6, and the intake valve 27
Is taken into the pumping / intake pipe 21 through the pump chamber 23, through the water injection pipe 22 and the gate valve 30.
It is supposed to be sent from. In this way
Groundwater taken from the upper aquifer 2 can be pumped to the ground.

Further, the water intake valve 27 and the water injection valve 3
1 is opened and the pump 29 is operated in a state where the gate valve 30 and the cleaning valve 28 are closed, whereby the groundwater flowing into the well pipe 8 from the upper aquifer 2 is taken from the water intake valve 27 and pumped. -The water injection valve 3 via the water intake pipe 21, the pump chamber 23, the pump 29, and the water injection pipe 22.
By injecting water into the well pipe 8 from 1, it is possible to inject water into the lower aquifer 3. At this time, water that exceeds the water injection capacity of the lower aquifer 3 can be discharged to the ground by adjusting the opening of the gate valve 30.

Further, when backwashing, the washing valve 28 and the gate valve 30 are opened and the water intake valve 27 is used.
By operating the pump 29 with the water injection valve 31 closed, the groundwater in the lower aquifer 3 can be taken into the pumping / intake pipe 21, which allows the screen 7 to be backwashed. ing.

In this way, the pumping device 20 described above is used.
Is a well pipe 8 having screens 6 and 7 at positions corresponding to the upper aquifer 2 and the lower aquifer 3, a pumping / intake pipe 21 and a water injection pipe 22 arranged in the well pipe 8, The packer 2 includes a pump chamber 23 arranged at the bottom of the well pipe 8.
The upper aquifer 2 and the lower aquifer 3 by 4 and the impermeable material 26
The structure is divided into. With such a pumping device 20, the intake valve 27 provided in the pumping / intake pipe 21.
And by opening and closing the water injection valve 31 provided in the water injection pipe 22, pumping groundwater from the upper aquifer 2 or pouring groundwater taken from the upper aquifer 2 into the lower aquifer 3. You can At this time, since the groundwater is poured into the lower aquifer 3 without being pumped to the ground, oxidation of iron ions and the like contained in the groundwater is prevented and clogging of the screen 7 due to water quality change of the groundwater is suppressed. be able to. Further, the screen 7 can be backwashed by opening the washing valve 28 provided in the pumping / intake pipe 21. In this way, since only one pump 29 can have a pumping function, a water intake and water injection function, and a backwash function, the pumping device 20 can be made low in cost and excellent in maintainability.

Further, since the pumping apparatus 20 is configured to include the water pressure gauge 33 in each of the upper aquifer 2 and the lower aquifer 3, it is possible to properly manage the well. Further, since the water injection pipe 23 is provided with the flow meter 32, the amount of water injected into the lower aquifer 3 can be grasped by this, and the well can be appropriately managed from this point as well.

[Second Embodiment] Next, a second embodiment of the pumping apparatus according to the present invention will be described. Here, a pumping device having a switching valve in the pump chamber will be described. Here, the same components as those of the water pumping apparatus 20 of the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

As shown in FIG. 2, the pumping device 35 is provided with an opening / closing valve 36 in the well pipe 8 at a position corresponding to the upper aquifer 2 as in the pumping device 20 of the first embodiment. A first pumping pipe (first pipe body) 37, a second pumping pipe (second pipe body) 39 having an opening / closing valve 38 at a position corresponding to the lower aquifer 3, and a pump chamber 40 are provided. It has been configured.

In the pump chamber 40, a switching valve 41, which can be switched by remote control from the surface of the earth, and a pump 42 are incorporated. As shown in FIG. 3, the switching valve 41 is connected to the first pumping pipe 37, the second pumping pipe 39, a communication pipe 43 communicating with the pump chamber 40, a pump 42, and a flow meter 44. Is connected to the connection pipe 45.

As shown in FIG. 2, the first pumping pipe 37,
The second pumping pipe 39 extends to the surface of the earth, and is connected to the discharge pipe 48 via gate valves 46 and 47.

In the pumping device 35 having such a structure, for example, when groundwater in the upper aquifer 2 is pumped to the ground, the opening / closing valve 38 and the gate valve 46 are closed and the opening / closing valve 36 of the first pumping pipe 37 is closed. Then, the gate valve 47 is opened. The switching valve 41 of the pump chamber 40 is switched so that the first pumping pipe 37 and the communication pipe 43 communicate with each other and the connection pipe 45 and the second pumping pipe 39 communicate with each other. By operating the pump 42 in this state, the groundwater in the upper aquifer 2 flows into the first pumping pipe 37 from the opening / closing valve 36 and into the pump chamber 40 via the communication pipe 43. Then, the ground water in the pump chamber 40 is pumped by the pump 42 from the discharge pipe 48 through the connection pipe 45, the second pumping pipe 39 and the gate valve 47.

Further, as shown in FIG. 4, for example, when groundwater of the upper aquifer 2 is taken and poured into the lower aquifer 3, the gate valves 46 and 47 are closed and the first pumping pipe 37 is closed. The open / close valve 36 and the open / close valve 38 of the second pumping pipe 39 are opened. Further, the switching valve 41 (see FIG. 3) of the pump chamber 40 is switched so that the first pumping pipe 37 and the communication pipe 43 communicate with each other and the connection pipe 45 and the second pumping pipe 39 communicate with each other. By operating the pump 42 in this state, the groundwater in the upper aquifer 2 is opened and closed by the opening / closing valve 36.
Flow into the first pumping pipe 37 and then into the pump chamber 40 through the communication pipe 43. Then, the ground water in the pump room 40 is pumped by the pump 42 into the connecting pipe 45 and the second pumping pipe 3.
Water is injected into the lower aquifer 3 from the opening / closing valve 38 via 9.

Further, as shown in FIG. 5, when injecting groundwater, for example, from the lower aquifer 3 into the upper aquifer 2, the gate valves 46 and 47 are closed and the first pumping pipe 3 is closed.
7 open / close valve 36 and second pumping pipe 39 open / close valve 3
Keep 8 and open. In addition, the switching valve 4 in the pump chamber 40
1 (see FIG. 3) is switched so that the first pumping pipe 37 and the connecting pipe 45 communicate with each other and the communication pipe 43 and the second pumping pipe 39 communicate with each other. By operating the pump 42 in this state, the groundwater in the lower aquifer 3 flows into the second pumping pipe 39 from the opening / closing valve 38 and into the pump chamber 40 via the communication pipe 43. Then, the ground water in the pump chamber 40 is pumped by the pump 42 into the communication pipe 43 and the first pumping pipe 37.
Water is injected into the upper aquifer 2 from the opening / closing valve 36 via the.

As described above, the pumping device 35 includes the first pumping pipe 37 having the opening / closing valve 36 and the second pumping pipe having the opening / closing valve 38 in the well pipe 8 installed in the drill hole 5. 39 and a pump chamber 40 provided with a pump 42 are provided, and the pump chamber 40 is provided with a switching valve 41. Thereby, since only one pump 42 can have the pumping function, the water intake function, and the water injection function, the pumping device 35 can achieve the same effect as the pumping device 20 of the first embodiment. . Furthermore, the flow direction of groundwater in the first pumping pipe 37 and the second pumping pipe 39 can be changed by switching the switching valve 41, whereby groundwater is taken from any aquifer, It will be possible to pump this or pour it into other aquifers.

[Third Embodiment] Next, a third embodiment of the pumping apparatus according to the present invention will be described. Here, for example, a pumping device in the case where four aquifers exist in the ground will be described. Here, the same components as those of the water pumping apparatus 20 of the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

As shown in FIG. 6, there is an aquifer 5 in the ground.
0, 51, 52 and 53 are present with the impermeable layer 1 in between.

The pumping device 55 corresponds to the aquifers 50 and 51 in the well pipe 8 provided so as to reach the lowermost aquifer 53, similarly to the pumping device 20 of the first embodiment. Corresponding to pumping / intake pipe 60 having water intake valves (open / close valves) 56 and 57 at positions and cleaning valves 58 and 59 at positions corresponding to aquifers 52 and 53, and aquifers 52 and 53 Water injection valve (open / close valve)
It has a schematic configuration including a water injection pipe 63 including 61 and 62, and a pump chamber 24 including a pump 29 connected to the water injection pipe 63.

In the well pipe 8, the aquifers 50 and 5 are formed.
Screens 64, 6 at positions corresponding to 1, 52, 53
5, 66, 67 are provided. Also, inside the well pipe 8, packers (impermeable zones) are provided at positions corresponding to the respective impermeable layers 1.
68 is provided. Further, the outer periphery of the well pipe 8 is filled with the filter material 25 at the positions corresponding to the aquifers 50, 51, 52 and 53, respectively, and at the positions corresponding to the other impermeable layers 1 above and below it. Water-blocking material 26 that blocks water
Is filled.

The pumping device 55 described above has the same basic structure as the pumping device 20 of the first embodiment,
With one pump 29, a predetermined aquifer 50, 51, 52,
It is possible to pump water from 53, inject groundwater taken from the aquifer 50 or 51 into the aquifer 52 or 53, and backwash the screens 66 and 67, whereby the same as in the first embodiment. It is designed to be effective. At this time, by selectively opening the water intake valves 56, 57, the cleaning valves 58, 59, and the water injection valves 61, 62, among the aquifers 50, 51, 52, 53,
It is possible to perform pumping, water intake, water injection, and backwash in any layer.

In the third embodiment, the pump chamber 24 may be provided with the switching valve 41 shown in the second embodiment.

[0039]

As described above, according to the pumping apparatus of the first aspect of the present invention, the well pipe provided with the screen at the position facing each aquifer in the excavation hole formed in the ground, and the upper and lower And a water barrier partitioning the aquifer, and a pump chamber with a pump at the bottom of the well pipe, and an opening / closing valve located in the aquifer to be pumped or withdrawn in the pump chamber. The first pipe body and the second pipe body having an opening / closing valve located in the aquifer to be injected are connected , and the upper end portion of the second pipe body is
A configuration connected to the gate valve provided on the ground, the
Pump only, pumping function, water intake and injection function, backwash machine
I tried to combine it with Noh. As a result, this pumping device can be made to have a pumping function, a water intake and water injection function, and a backwash function with only one pump, and this can be made low in cost and excellent in maintainability. it can. At this time, when injecting groundwater taken from a predetermined aquifer to other aquifers, since the taken groundwater is to be injected through the pump chamber at the bottom of the well pipe, Without touching the air, it is possible to prevent oxidation of iron ions contained in groundwater, etc., and suppress clogging of the screen.

According to the pumping apparatus of the second aspect, the pump chamber is provided with the switching valve, and the switching valve has the first pipe body, the second pipe body, the pump, and the communication pipe communicating with the pump chamber. It is configured to connect with. Thus, by switching the switching valve, the flow of groundwater in the first pipe and the second pipe can be freely switched. Groundwater is taken from any aquifer and pumped. Alternatively, it becomes possible to inject water into other aquifers.

According to the pumping apparatus of the third aspect, each aquifer has a water pressure gauge. As a result, the water pressure inside the well can be grasped and the well can be properly managed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of a water pumping device according to the present invention.

FIG. 2 is a vertical cross-sectional view showing another example of the water pumping device according to the present invention.

FIG. 3 is a vertical cross-sectional view showing a switching valve provided in the water pumping device.

FIG. 4 is a vertical cross-sectional view showing a state in which groundwater taken from an upper aquifer is poured into the lower aquifer by the pumping apparatus.

FIG. 5 is a vertical cross-sectional view showing a state in which groundwater taken from the lower aquifer is poured into the upper aquifer by the pumping device.

FIG. 6 is a vertical sectional view showing still another example of the water pumping apparatus according to the present invention.

FIG. 7 is a vertical sectional view showing an example of a conventional water pumping device.

FIG. 8 is a vertical sectional view showing another example of a conventional water pumping device.

[Explanation of symbols]

1 impermeable layer 2 Upper aquifer (aquifer) 3 Lower aquifer (aquifer) 5 drilling holes 6,7,64,65,66,67 screen 8 well tubes 20,35,55 Pumping equipment 21,60 Pumping and intake pipes 22,63 Water injection pipe 23,40 pump room 24,68 packer (water barrier) 26 Impermeable material (impermeable zone) 27,56,57 Water intake valve (open / close valve) 29,42 pumps 31, 61, 62 Water injection valve (open / close valve) 33 Water pressure gauge 36,38 open / close valve 37 First pumping pipe (first pipe body) 39 Second pumping pipe (second pipe) 41 Switching valve 50,51,52,53 aquifer

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 1/06 E03B 3/08

Claims (3)

(57) [Claims] 1. A plurality of aquifers are provided on the ground existing with an impermeable layer sandwiched between them to pump water individually from each aquifer or to extract groundwater from a specified aquifer. A pumping device for injecting water into another aquifer, wherein an excavation hole is formed in the ground to penetrate the impermeable layer and reach the aquifer below the excavation layer. In the hole, an impermeable zone that partitions the upper and lower sides of the impermeable layer to block water, and a well pipe provided with a screen at a position facing each of the aquifers are arranged. A pump chamber provided with a single pump is formed at the bottom, and the pump chamber is provided with an opening / closing valve that is located in an aquifer to be pumped or withdrawn and is opened / closed by remote control. And the open / close valve that is located in the aquifer to be filled and can be opened / closed by remote control. Is connected to the second pipe body, the upper end portion of the second pipe body is connected to a gate valve provided on the ground side, the operation of the one pump and the opening and closing valve A pumping device characterized by having a pumping function, a water intake and water injection function, and a backwash function only by operation . 2. The pumping apparatus according to claim 1, wherein the pump chamber is provided with a switching valve that is remotely operated,
The pumping device is characterized in that the switching pipe is connected to the first pipe body, the second pipe body, the pump, and a communication pipe communicating with the pump chamber. 3. The pumping apparatus according to claim 1, wherein each of the aquifers is equipped with a water pressure gauge.