Water quality and quantity survey device at each level
The device addresses the challenge of measuring groundwater levels by using a packer and submersible pump to separate and measure the water level of the first groundwater, ensuring accurate results in multi-aquifer environments.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- NAKASHIMA IND
- Filing Date
- 2022-03-02
- Publication Date
- 2026-06-10
AI Technical Summary
Existing water sampling devices struggle to accurately measure the water level of groundwater at the desired location, particularly when multiple aquifers are present, leading to mixing of groundwater from different layers.
A single-layer water quality and quantity surveying device with a first packer to separate groundwater from different aquifers, a submersible pump to pump up only the first groundwater, and a first water level measuring device to measure the water level of the first groundwater.
The device effectively pumps up and measures the water level of the first groundwater, preventing mixing with other groundwater layers and ensuring accurate measurement.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a device for investigating water quality and quantity of each layer.
Background Art
[0002] The following Patent Document 1 describes a sampling device including an upper packer part having an expansion part, a submersible pump for sucking the well water, and a lower packer part having an expansion part. Such a sampling device is said to be able to accurately sample the well water between the upper packer part and the lower packer part.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, with the above-described sampling device, there is a problem that while sampling the well water at the desired location, the water level (water head) of the well water cannot be easily measured.
[0005] In view of the above actual situation, the present disclosure has been devised, and the main object is to provide a device for investigating water quality and quantity of each layer that can pump up the first groundwater and easily measure the water level of the first groundwater.
Means for Solving the Problems
[0006] This disclosure relates to a single-layer water quality and quantity surveying device for investigating the water quality or quantity of groundwater flowing into a well, wherein the well is located in ground where a plurality of aquifers are arranged vertically, the aquifers include a first aquifer and a second aquifer adjacent to the upper part of the first aquifer, the groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer, and the single-layer water quality and quantity surveying device includes a first packer to prevent the first groundwater and the second groundwater from mixing, a pump house located above the first packer and housing a submersible pump for pumping up only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. [Effects of the Invention]
[0007] Each layer water quality and quantity survey device in this disclosure, by adopting the above configuration, can pump up the first groundwater and easily measure the water level of the first groundwater. [Brief explanation of the drawing]
[0008] [Figure 1] This is a conceptual side view showing each layer water quality and quantity surveying device and well according to one embodiment of the present disclosure. [Figure 2] Figure 1 is a side view of each layer water quality and quantity survey device. [Figure 3] This is a conceptual side view showing the water quality and quantity surveying device and well in other embodiments. [Modes for carrying out the invention]
[0009] One form of implementation of this disclosure will be described below with reference to the drawings. Figure 1 is a conceptual side view of the water quality and quantity survey device (hereinafter sometimes referred to as "device") 1 of this embodiment. Figure 1 shows that the device 1 is located inside a well W installed in the ground G. The device 1 of this disclosure is for investigating the water quality or quantity of groundwater S flowing into the well W.
[0010] As shown in Figure 1, the ground G is formed by multiple aquifers T arranged vertically. In this embodiment, the ground G consists of alternating aquifers T and impermeable layers H. The aquifers T have properties that allow groundwater S to flow more easily than the impermeable layers H.
[0011] In this embodiment, the aquifer T includes a first aquifer T1 and a second aquifer T2 adjacent to the first aquifer T1 above. The aquifer T further includes, for example, a third aquifer T3 adjacent to the first aquifer T1 below. The impermeable layer H in this embodiment includes a first impermeable layer H1 between the first aquifer T1 and the second aquifer T2, a second impermeable layer H2 between the first aquifer T1 and the third aquifer T3, and a third impermeable layer H3 located below the third aquifer T3. The impermeable layer H is also located, for example, above the second aquifer T2.
[0012] In this embodiment, the well W extends from the ground surface to the third impermeable layer H3. The inner surface of the well W is formed, for example, by a casing pipe K and a strainer pipe M for reinforcing the well W. The casing pipe K is composed of a well-known structure that has the function of preventing the inflow of soil and groundwater S into the well W, and is placed in each impermeable layer H. The strainer pipe M is composed of a well-known structure that has the function of allowing groundwater S to flow into the well W while preventing the inflow of soil, and is placed in each aquifer T. The casing pipe K and the strainer pipe M are formed of, for example, synthetic resin or metal. The well W is not particularly limited, but has a depth of 30 to 300 m and an inner diameter of 150 to 400 mm.
[0013] The first aquifer T1 allows the first groundwater S1 to flow into the well W. The second aquifer T2 allows the second groundwater S2 to flow into the well W. The third aquifer T3 allows the third groundwater S3 to flow into the well W. The first groundwater S1 through the third groundwater S3 may have different water qualities, or they may have the same water quality.
[0014] Figure 2 shows only the apparatus 1, with the well W and ground G removed from Figure 1. Figure 2 shows the first and second expanders, which will be described later, in a contracted state. As shown in Figures 1 and 2, the apparatus 1 includes, for example, a first packer 2, a pump unit 3, and a first water level measuring device 4. In this embodiment, the first packer 2 has the function of preventing the mixing of the first groundwater S1 and the second groundwater S2. In this embodiment, the pump unit 3 can pump up only the first groundwater S1. In this embodiment, the first water level measuring device 4 has the function of measuring the water level of the first groundwater S1.
[0015] The first packer device 2 includes a first conduit section 2A that guides groundwater S to the pump unit 3, and a first expansion section 2B that is held on the outer surface of the first conduit section 2A and can expand until it is in close contact with the inner surface of the well W. An expansion fluid, such as compressed air or compressed nitrogen gas, is supplied to the first expansion section 2B. As a result, the first expansion section 2B expands. The expansion fluid is supplied from a supply pipe of a well-known structure (not shown). When the expansion fluid is exhausted from the first expansion section 2B, the first expansion section 2B contracts. The first expansion section 2B is formed of, for example, flexible or elastic hard rubber. Thus, in this embodiment, the first packer device 2 and the second packer device 6, which will be described later, are formed of a well-known structure.
[0016] The first expansion section 2B prevents the movement of groundwater S between the outer surface of the first conduit section 2A and the inner surface of the well W. In this embodiment, the first expansion section 2B is positioned to be in close contact with the inner surface of the first impermeable layer H1, thereby preventing the mixing of the first groundwater S1 with the second groundwater S2 flowing in from the second aquifer T2 above the first impermeable layer H1. For example, the degree of contact between the first expansion section 2B and the inner surface of the well W can be determined by the first water level measuring device 4.
[0017] Further, the first packer tool 2 includes a first centralizer 2C having a well-known structure that is held on the outer peripheral surface of the first conduit portion 2A and has a function of arranging the first conduit portion 2A at the center of the well W. In this embodiment, the first centralizer 2C is attached above the first expansion portion 2B.
[0018] The pump unit 3 includes, for example, a submersible pump 3A and a pump house 3B that houses the submersible pump 3A. In this embodiment, the pump unit 3 is arranged above the first packer tool 2.
[0019] The submersible pump 3A is, for example, of a well-known structure. Although not particularly limited, the submersible pump 3A is preferably one with a flow rate of 20 to 2500 L / min. The pump house 3B has a structure that prevents the submersible pump 3A from sucking up the groundwater S (in this embodiment, the second groundwater S2) that contacts the outer surface of the pump house 3B.
[0020] The pump house 3B is connected to the first conduit portion 2A via, for example, a first connecting pipe 11. The first connecting pipe 11 can guide the groundwater (in this embodiment, the first groundwater S1) inside the first conduit portion 2A to the submersible pump 3A housed in the pump house 3B. An upper conduit portion 13 extending to the ground surface is attached to the discharge port of the submersible pump 3A. Thus, in the apparatus 1 of this embodiment, at the ground surface, the first groundwater S1 can be pumped up and its water quality can be investigated.
[0021] In this embodiment, the first water level measuring tool 4 includes a lower water pipe portion 4b that penetrates the first conduit portion 2A and extends to the ground surface, and a lower water level measuring hole 4a arranged at the lower end of the lower water pipe portion 4b. The lower water level measuring hole 4a is arranged, for example, on the lower surface of the first conduit portion 2A. As a result, the inside of the lower water pipe portion 4b is filled with the first groundwater S1.
[0022] The first water level measuring device 4 includes, for example, a pressure type water level sensor (not shown) with a well-known structure. In the pressure type water level sensor, the water head of the groundwater S (first groundwater S1) from the ground surface side can be detected as water pressure and measured as the groundwater level. The pressure type water level sensor is arranged, for example, in the lower water pipe portion 4b. Also, the first groundwater S1 inside the lower water pipe portion 4b is blocked from the first groundwater S1 passing through the first conduit portion 2A that is led to the submersible pump 3A. Therefore, in the first water level measuring device 4 of the present embodiment, since the influence of the suction pressure of the submersible pump 3A on the first groundwater S1 inside the lower water pipe portion 4b is small, the water level can be measured accurately.
[0023] Also, the device 1 of the present embodiment includes a second water level measuring device 5, a second packer device 6, and a third water level measuring device 7. The second water level measuring device 5 has a function of measuring the water level of the second groundwater S2. The second packer device 6 has a function of suppressing the mixing of the first groundwater S1 and the third groundwater S3. The third water level measuring device 7 has a function of measuring the water level of the third groundwater S3. In the present embodiment, the second water level measuring device 5 and the third water level measuring device 7 can measure the water levels of the respective groundwaters S2 and S3 using a pressure type water level sensor with a well-known structure in the same manner as the first water level measuring device 4.
[0024] In this embodiment, the second packer 6 includes a second conduit section 6A, a second expansion section 6B, and a second centrizer 6C. The second conduit section 6A can hold groundwater S (first groundwater S1 in this embodiment). The second expansion section 6B is held by the outer surface of the second conduit section 6A and can expand until it is in close contact with the inner surface of the well W. The second expansion section 6B closes off the movement of groundwater S between the outer surface of the second conduit section 6A and the inner surface of the well W. In this embodiment, the second expansion section 6B is positioned in close contact with the inner surface of the second impermeable layer H2, thereby preventing the mixing of the first groundwater S1 and the third groundwater S3. Similar to the first expansion section 2B, the expansion fluid is supplied to the second expansion section 6B from a supply pipe of a well-known structure (not shown). In this embodiment, the second centrizer 6C is positioned below the second expansion section 6B. For example, the degree of adhesion between the second expansion section 6B and the inner surface of the well W can be determined by the third water level measuring device 7.
[0025] The second conduit section 6A is connected to the first conduit section 2A, for example, via a second connecting pipe 12. In this embodiment, the second connecting pipe 12 is a strainer pipe capable of taking in the first groundwater S1. A well-known structure is used as the strainer pipe. The first groundwater S1 is pumped to the surface by a submersible pump 3A, passing through the second connecting pipe 12, the first conduit section 2A, the first connecting pipe 11, and the pump house 3B.
[0026] The second water level measuring device 5 includes, for example, a second water level measuring hole 5a located above the first packer device 2, and a second water pipe section 5b extending upward from the second water level measuring hole 5a. The second water level measuring hole 5a is located above the pump unit 3, for example. The second water pipe section 5b extends to the ground surface, for example. The inside of the second water pipe section 5b is filled with second groundwater S2. This allows the water level of the second groundwater S2 to be measured by the pressure-type water level sensor.
[0027] The third water level measuring device 7 includes, for example, a third water pipe section 7b that penetrates the second conduit section 6A and extends to the ground surface, and a third water level measuring hole 7a located at the lower end of the third water pipe section 7b. The third water pipe section 7b is also positioned to penetrate the first conduit section 2A. The inside of the third water pipe section 7b is filled with third groundwater S3. The third water pipe section 7b prevents the third groundwater S3 filling its interior from mixing with the first groundwater S1 and the second groundwater S2. This allows the water level of the third groundwater S3 to be measured by the pressure-type water level sensor. Each water pipe section 4b, 5b, and 7b is formed, for example, from a pipe of a well-known structure having flexibility.
[0028] Figure 3 is a side view of the water quality and quantity survey device 1 in other embodiments. Components identical to those in this embodiment are denoted by the same reference numerals and their descriptions may be omitted. As shown in Figure 3, the first water level measuring device 4 of the device 1 is formed to include an upper water level measuring hole 4c located above the lower water level measuring hole 4a. This first water level measuring device 4 includes an upper water pipe section 4d extending from inside the pump house 3B to the ground surface, and an upper water level measuring hole 4c located at the lower end of the upper water pipe section 4d. In this embodiment, since the upper water level measuring hole 4c is located inside the pump house 3B, the upper water pipe section 4d is filled with first groundwater S1. Such a first water level measuring device 4 is useful for measuring the water level of the first groundwater S1 when it is difficult to pass the lower water pipe section 4b between the pump house 3B and the well W. The upper water level measuring hole 4c is located, for example, below the suction port of the submersible pump 3A. The first water level measuring device 4 may also include a lower water level measuring hole 4a and an upper water level measuring hole 4c.
[0029] Although particularly preferred embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the illustrated embodiments and can be modified and implemented in various ways. Since the apparatus 1 of the present disclosure is held so as to be movable up and down within the well, it is possible to similarly investigate the water quality and water level of the groundwater (not shown) in the aquifer even when the aquifer is located below the third aquifer T3. Furthermore, such an apparatus 1 is useful for reproducing (rehearsal testing) the water quality of the groundwater in the remaining aquifer T when a portion of the aquifer T of the well W is closed.
[0030] [Note] This disclosure includes the following aspects.
[0031] [Disclosure 1] A device for investigating the water quality or quantity of groundwater flowing into a well, The aforementioned well is located in a ground where multiple aquifers are arranged vertically. The aquifer includes a first aquifer and a second aquifer adjacent to the upper part of the first aquifer. The aforementioned groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer. The system includes a first packing device that prevents the first groundwater and the second groundwater from mixing, a pump house positioned above the first packing device and housing a submersible pump for pumping only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. Water quality and quantity survey equipment for each layer. [Disclosure 2] The first packer device includes a first conduit section that guides the first groundwater into the pump house, The first water level measuring device includes a lower water pipe section that penetrates the first conduit section and extends to the ground surface, and a lower water level measuring hole located at the lower end of the lower water pipe section, as described in Disclosure 1, for each layer water quality and water quantity survey device. [Disclosure 3] The first water level measuring device includes an upper water pipe section extending from inside the pump house to the ground surface, and an upper water level measuring hole located at the lower end of the upper water pipe section, as described in Disclosure 1 or 2 of this invention, for each layer water quality and quantity survey device. [Disclosure 4] The invention further includes a second water level measuring device for measuring the water level of the second groundwater, The water quality and quantity survey device for each layer according to any one of disclosures 1 to 3, wherein the second water level measuring device includes a second water level measuring hole located above the first packer device and a second water pipe section extending from the second water level measuring hole to the ground surface. [Disclosure 5] The aquifer includes a third aquifer adjacent to the first aquifer below it. The aforementioned groundwater includes the third groundwater flowing in from the third aquifer. A water quality and quantity survey device for each layer according to any one of disclosures 1 to 4, further comprising a second packer for preventing the mixing of the first groundwater and the third groundwater, and a third water level measuring device for measuring the water level of the third groundwater. [Disclosure 6] The second packer includes a second conduit section capable of holding the first groundwater, The third water level measuring device includes a third water pipe section that penetrates the second conduit section and extends to the ground surface, and a third water level measuring hole located at the lower end of the third water pipe section, as described in Disclosure 5. [Disclosure 7] The first packer device includes a first conduit section that guides the first groundwater into the pump house, The third water pipe section penetrates the first conduit section, and is a water quality and quantity survey device for each layer as described in Disclosure 6. [Explanation of symbols]
[0032] 1 Water quality and quantity survey device for each layer 2. First packing tool 2A 1st conduit section 3B Pump House 3A Submersible Pump 4 1st water level measuring device 4a Upper water level measurement hole 4c Lower water level measurement hole S Groundwater S1 1st groundwater W Well
Claims
1. A device for investigating the water quality or quantity of groundwater flowing into a well, The aforementioned well is located in a ground where multiple aquifers are arranged vertically. The aquifer includes a first aquifer and a second aquifer adjacent to the upper part of the first aquifer. The aforementioned groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer. The system includes a first packer device that prevents the first groundwater and the second groundwater from mixing, a pump house positioned above the first packer device and housing a submersible pump for pumping only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. The first packer device includes a first conduit section that guides the first groundwater into the pump house, The first water level measuring device includes a lower water pipe section that penetrates the first conduit section and extends to the ground surface, and a lower water level measuring hole located at the lower end of the lower water pipe section. Water quality and quantity survey equipment for each layer.
2. A device for investigating the water quality or quantity of groundwater flowing into a well, wherein the device investigates the water quality or quantity of groundwater in each layer, The aforementioned well is located in a ground where multiple aquifers are arranged vertically. The aquifer includes a first aquifer and a second aquifer adjacent to the upper part of the first aquifer. The aforementioned groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer. The system includes a first packer device that prevents the first groundwater and the second groundwater from mixing, a pump house positioned above the first packer device and housing a submersible pump for pumping only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. The first water level measuring device includes an upper water pipe section extending from inside the pump house to the ground surface, and an upper water level measuring hole located at the lower end of the upper water pipe section. Water quality and quantity survey equipment for each layer.
3. A device for investigating the water quality or quantity of groundwater flowing into a well, wherein the device investigates the water quality or quantity of groundwater in each layer, The aforementioned well is located in a ground where multiple aquifers are arranged vertically. The aquifer includes a first aquifer and a second aquifer adjacent to the upper part of the first aquifer. The aforementioned groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer. The system includes a first packer device that prevents the first groundwater and the second groundwater from mixing, a pump house positioned above the first packer device and housing a submersible pump for pumping only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. The invention further includes a second water level measuring device for measuring the water level of the second groundwater, The second water level measuring device includes a second water level measuring hole located above the first packer device, and a second water pipe section extending from the second water level measuring hole to the ground surface. Water quality and quantity survey equipment for each layer.
4. A device for investigating the water quality or quantity of groundwater flowing into a well, wherein the device investigates the water quality or quantity of groundwater in each layer, The aforementioned well is located in a ground where multiple aquifers are arranged vertically. The aquifer includes a first aquifer and a second aquifer adjacent to the upper part of the first aquifer. The aforementioned groundwater includes first groundwater flowing in from the first aquifer and second groundwater flowing in from the second aquifer. The system includes a first packer device that prevents the first groundwater and the second groundwater from mixing, a pump house positioned above the first packer device and housing a submersible pump for pumping only the first groundwater, and a first water level measuring device for measuring the water level of the first groundwater. The aquifer includes a third aquifer adjacent to the first aquifer below it. The aforementioned groundwater includes the third groundwater flowing in from the third aquifer. The device further includes a second packing device for preventing the mixing of the first groundwater and the third groundwater, and a third water level measuring device for measuring the water level of the third groundwater. The second packer includes a second conduit section capable of holding the first groundwater, The third water level measuring device includes a third water pipe section that penetrates the second conduit section and extends to the ground surface, and a third water level measuring hole located at the lower end of the third water pipe section. Water quality and quantity survey equipment for each layer.
5. The first packer includes a first conduit section for guiding the first groundwater into the pump house, The third water pipe section penetrates the first conduit section, as described in claim 4, for each layer water quality and quantity survey device.