JPS6219732A - Deep well pumping-up device - Google Patents

Abstract

PURPOSE:To pump up in constant quantity and continuously without disturbing the underground water in a deep well and to enable a sampling anytime by providing the pumping pipe to pump up a fluid, gaseous body feeding pipe and suction device. CONSTITUTION:A vacuum device 20 is actuated by inserting a pumping pipe 1 into a deep well casing 3, by opening one part of each switching valve 7, 8 and by closing the other part and by feeding a compressed air into a gaseous body feeding pipe 4 from a gaseous body feeding source 5. Accordingly the residence water inside the well is ascended in the pumping pipe 1 and stored in a vacuum tank 9 via a branch pipe 6 and switching valve 7. In this case the compressed air inside the gas body feeding pipe 4 is blown out of a blow-out port 4a, so the inside of the well is not disturbed. In case of the tank 9 being filled up the switching valve 8 is opened and switching valve 7 is closed and the underground water is led to the vacuum tank 10 of the other part. With the pumping up of the residence water inside the casing 3 by repeating the opening and closing work of each switching valve 7, 8 alternately like the above the residence water inside the well is automatically replaced with the underground penetrant, so the sampling can be performed at the stage thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a deep well pumping device for pumping up groundwater in a small-diameter deep well, mainly when conducting groundwater quality surveys.

"Conventional Technology" In recent years, in order to preserve the quality of groundwater, it has become common to periodically sample groundwater from deep wells and conduct water quality surveys. At this time, it is necessary to pump up the groundwater in the deep well, and conventionally, when pumping up the groundwater in the deep well, a deep well pump, an air lift pump, a container, etc. have been used.

``Immediate issue that the invention seeks to solve'' By the way, in the case of observation wells, etc., the diameter of the well casing is small (for example, about 5θ), so the conventional deep well pump described above cannot In addition, in the conventional air lift pump mentioned above, the compressed air supplied into the air lift pump violently agitates the groundwater in the deep well, resulting in the contamination of the pumped groundwater with impurities. However, there is a problem that accurate groundwater composition cannot be obtained. Furthermore, when a container is lowered into a deep well to collect groundwater, the accumulated water in the well is simply pumped up, and there is a problem in that it is impossible to ascertain the exact state of the groundwater at the time of measurement. .

As described above, in any of the above cases, essential groundwater investigation is difficult, and especially the higher the height and the smaller the diameter, the more difficult the pumping and sampling work.

The present invention has been made in view of the above circumstances, and its purpose is to be able to pump up groundwater or sediment in a deep well quantitatively and continuously without stirring it within the deep well. An object of the present invention is to provide a deep well pumping device that can sample groundwater at any time.

``Means for Solving the Problems'' In order to achieve the above object, the present invention provides a pumping pipe for pumping up fluid in a well, and a gas pump installed in the pumping pipe from a blowhole to the inside of the pumping pipe. The well is equipped with a gas supply pipe for spouting out water, and a suction device connected to the pumping pipe and sucking up the fluid in the well.

"Function" In the deep well pumping device of the present invention, compressed gas is supplied from the blowhole to the inside of the pumping pipe via the gas supply pipe, and a suction device not connected to the pumping pipe is operated, A combination of compressed gas and the suction power of a suction device sucks up groundwater, sediment, etc. from deep wells.

"Embodiment" Hereinafter, a first embodiment of the present invention will be described based on FIG.

1 in the figure is a lift pipe inserted into a deep well casing 3 having a deep well strainer 2 at the bottom;
A suction port 1a is formed at the lower end of the pump pipe 1.
The upper end of is closed.

The lifting pipe 1 may include a hose (flexible pipe), a steel pipe, etc.
The material is selected depending on the work situation. Further, a gas supply pipe 4 is inserted into the lift pipe 1 by penetrating the upper end of the lift pipe 1, and a blowhole 4a for air lift is formed at the lower end of the gas supply pipe 4. ing.

The gas supply pipe 41C is connected to a gas supply source 5 that supplies compressed gas such as air to the gas supply pipe 4.

Furthermore, a branch pipe 6 is connected to the upper end of the lift pipe 1, and the branch pipe 6 has switching valves 7 and 8, respectively.
Two vacuum tanks with water storage and water sampling functions through
, 10 are connected. These vacuum tanks 9, 10
are each provided with an intake valve 11, 12 at the top, sampling cocks 13, 14 at appropriate positions on the outer periphery, a drain valve 15, 16 at the bottom end, and a pair of exhaust valves. A vacuum device 20 such as a vacuum pump is connected via a vacuum draw pipe 19 having a diameter of 17 and 18.

Using the deep well pumping device configured as described above, high head (depth H from ground surface GL to groundwater level WL is 10I
When carrying out water pumping or mud pumping (if the number exceeds 11),
First, insert the pumping pipe 1 into the deep well taping 3, and open one of the switching valves 7 and 8 and keep the other closed (for example, open the switching valve 7 and close the switching valve 8. In this state, air is fed into the gas supply pipe 4 from the gas supply source 5, and the vacuum device 20 is operated. As a result, the compressed air in the gas supply pipe 4 is ejected from the blowhole 4a into the lift pipe 1, mixes with the water accumulated in the lift pipe 1, and pushes it up, creating a so-called air lift effect. The effect of creating a negative pressure inside the pipe 1 works (because both effects work together, the heated water in the well rises through the pumping pipe 1 yen, passes through the branch pipe 6 and the switching valve 7, and flows into the vacuum tank. 9. In this case, the compressed air in the gas supply pipe 4 is transferred from the blowhole 4a to the pumping pipe l.
Since the water is ejected into the well, there is no need to violently agitate the inside of the well. Further, the gas A separated from the groundwater contained in the vacuum tank 9 passes through the exhaust valve 17 and the vacuum extraction pipe 19, and is discharged from the vacuum equipment 9120.

Furthermore, when the vacuum tank 9 is full, the switching valve 8
(and close the switching valve 7, and then open the other vacuum tank 10.
Direct groundwater to. In this way, by alternately repeating the opening and closing operations of the respective switching valves 7 and 8, the deep well casing 3
When the stagnant water in the well is pumped up, the stagnant water in the well automatically replaces the underground seepage water, so if you sample when it is replaced with the underground seepage water, you can investigate the condition of the groundwater at the time of sampling. can. Note that when the pumping head is low (H <approximately 7011 hours), water can be pumped simply by operating the vacuum device 20 without supplying compressed air from the gas supply source 5. By changing the insertion depth of the lift pipe 1,
Since the positional relationship between the position of the blowhole 4a of the gas supply pipe 4 and the underground water level WL changes, the lift height and amount of pumped water can be easily adjusted. Furthermore, with only the vacuum device 20 in operation, the water level can be measured by inserting the water pump 1 into the deep well casing 3 and detecting water landing in the water pipe 1 based on changes in the vacuum gauge. .

Next, a second embodiment of the present invention will be described based on the second F14. In this embodiment, the first
A sampling tank 21, 22 and a vacuum tank 23, 24 are provided in place of the vacuum tanks 9, 100 of the embodiment, and the same components are given the same reference numerals and their explanation will be omitted.

Each of the above-mentioned sampling tanks 21 and 22 includes:
Intake valves 25 and 26 are provided at the top, sampler cocks 27 and 28 are provided at appropriate positions on the outer periphery, and drain valves 29 and 30 are provided at the lower end, and these sampling tanks 21 and 22 are , on the upstream side of the bypass valves 31 and 32 provided in the branch pipe 6, the water sampling valve 33
, 34 to the branch pipes 6 via sampling pipes 35, 34, and downstream of each bypass valve 31, 32, an exhaust pipe 39.39 having an exhaust valve 37.38.
They are each connected to the branch pipe 6 via 40. Further, each of the vacuum tanks 23, 24 is provided with an intake valve 41, 42 at the upper end, a drain valve 43, 44 at the lower end, and a pair of exhaust valves 17, 18. A vacuum device 20 such as a vacuum pump is connected via a pipe 19.

In order to pump water or pump mud at a high head (l>about 10 ta) using the deep well pumping device configured as described above, the inside of the deep well casing 3 is After inserting the lift pipe 1 into the tank and switching the switching valves 7 and 8, compressed air is fed into the gas supply pipe 4 and the vacuum device 2o is activated. As a result, the air lift action and the vacuum force work together to pump up the groundwater in the well through the pumping pipe l. Then, the switching valves 7 and 8 are alternately opened and closed to accommodate groundwater in the well in each vacuum tank 23, 24.

In this way, the stagnant water in the well is pumped up, and when the stagnant water is automatically replaced with underground water, the water sampling valve 3
3. Open the exhaust valve 37, water sampling valve 34, and exhaust valve 38, and close the bypass valve 31 or 32 to introduce groundwater into the sampling tank 21, 22. Therefore, water can be sampled at any time. can.

Furthermore, a third embodiment of the present invention will be described based on FIG. In this embodiment, the vacuum tanks 23, 24 and vacuum equipment fi! of the second embodiment shown in FIG. 20, a vacuum device 50 that can continuously suck gas and liquid and separate gas and liquid is provided, and the other configuration is the same as in the second example.
Since it is similar to the embodiment, the same reference numerals are given and the explanation is omitted.

In order to perform high-head water and mud pumping using this deep well pumping device, the pumping pipe 1 is inserted into the deep well casing 3 and the gas supply pipe 4 is inserted in the same way as in the above embodiments. It is sufficient to send in compressed air and operate the vacuum device 50. As a result, the air lift effect and the suction force effect by the vacuum device 50 combine to cause the groundwater in the well to flow into the pumping pipe 1.
The vacuum device 5 is pumped up through the branch pipe 6.
Gas A and liquid B are separated within the tank and each is discharged. In this way, when the accumulated water in the well is continuously pumped up and replaced with underground water, the water sampling valve 33
, open the exhaust valve 37 and close the bypass valve 31, or open the water sampling valve 34 and exhaust valve 38 and close the bypass valve 32,
By introducing groundwater into the sampling tanks 21, 22, water can be sampled at any time.

In each of the above-mentioned embodiments, the water pump l and the gas supply pipe 4 are made into a double pipe structure to form a deep well cage.

Although the explanation has been made with a configuration that is easy to insert into the blowfish 3, if there is enough space in the well casing diameter, the pumping pipe and the gas supply pipe can be separated into a configuration in which the blower port of the gas supply pipe can be used for pumping. Pressure gas inside the pumping pipe may be blown out by a button connected to the lower part of the pipe.

Further, in each of the above embodiments, various vacuum devices [20, 50 and a vacuum tank 9, 10° 23.
24 or sampling tank (water sampling device) 21.2
Although the explanation has been made using a configuration in which 2 and 2 are combined, it goes without saying that the configuration is not limited to this. Furthermore, the present invention can be applied not only to water pumping, mud pumping, and sampling in deep wells, but also to deep sampling in rivers, lakes, and harbors.

“Effects of the Invention” “As explained above, the present invention provides a pumping pipe for pumping up fluid in a well, and a gas blowing pipe for spouting gas into the pumping pipe from a blowhole installed at the bottom of the pumping pipe. Since it is equipped with a supply pipe and a g & σ1 device connected to the lifting pipe and sucking up the fluid i in the well, compressed gas is supplied from the fumarole to the inside of the pumping pipe via the gas supply pipe. At the same time, a suction device connected to the pumping pipe is activated, and by combining the air lift effect of the compressed gas and the suction force of the suction device, groundwater, sediment, etc. are continuously removed from the deep well without stirring the inside of the well. Therefore, the accumulated water in the well is automatically replaced with underground percolation water, and groundwater can be sampled at the time of pumping, so by sampling using a water sampling device according to the membership fee. It is possible to collect samples at any time during pumping work, and the original condition of groundwater can be ascertained.In addition, it has excellent effects such as easily increasing the pumping head and pumping water (mo)mm by simply changing the depth of the pumping pipe. .

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram 1a showing the first embodiment of the present invention, and FIG.
The figure is a schematic diagram showing a second embodiment of the present invention, and FIG. 3 is a schematic diagram showing a third embodiment of the invention. 1... Lifting pipe, 3... Deep well casing, 4''''°'' gas supply pipe, 4a-... Fumarole port, 9, 10... Vacuum Tank, 20...
Vacuum equipment, 21.22...Sampling tank, 23,24...Vacuum tank, 50...
・Vacuum equipment. Applicant: Ministry of Construction, Chubu Regional Construction Bureau, Maezawa Kogyo Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A lift pipe that is inserted into a well to pump up fluids such as liquid or slurry in the well, and a gas supply that blows gas into the lift pipe from a blowhole installed at the bottom of the lift pipe. A deep well pumping device comprising: a pipe; and a suction device connected to the pumping pipe and sucking up fluid in the well. (2) A patent characterized in that the suction device is comprised of a vacuum device for creating a negative pressure in the pumping pipe, and a water sampling device for collecting the fluid pumped up by the pumping pipe. A deep well pumping device according to claim 1.