JPH0648120B2 - Well equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a well device used for snow removal or the like capable of exchanging heat with groundwater heat of a predetermined aquifer.

[Conventional technology and its problems]

Conventionally, Japanese Patent Publication No. 51-12337 has been used to utilize underground heat by preventing depletion of groundwater and ground subsidence caused by it.
A method of heating water for snow melting on a road surface by utilizing heat of ground water is disclosed in Japanese Patent Laid-Open Publication No. 2003-242242. This heating method is to recirculate the groundwater in the aquifer through a pumping well, heat exchanger, injection well, and aquifer route, so that when water such as ponds and rivers passes through the heat exchanger, It is heated and sent to the road surface as snow melting water.

However, with this method, there are two
Since it requires a well device for a book, it is a relatively large-scale device.

As one means for solving such a problem, JP-A-60
The snow-melting well of Japanese Patent No. 184109 is known. This snow melting well is equipped with a water absorption strainer that pumps up groundwater in a deep aquifer in the deep position of the well pipe, and a return water strainer that matches the shallow aquifer above this water absorption strainer.
A partition wall is provided in the well pipe between the water absorption strainer and the return water strainer, and groundwater pumped from a deep aquifer through the water absorption strainer is directly or indirectly used for snow removal work. It is possible to inject snow-melting water into a well pipe by a return pipe to make it return to a shallow aquifer, and pump up groundwater by one well pipe divided by a dividing wall to return water.

By the way, there are several aquifers in the stratum, and each groundwater temperature is warm or cold. This depends on various factors such as the season. For this reason, it is desirable to use warmer groundwater for snow removal, for example.

However, in the snowmelt well, since water is taken from the groundwater absorption strainer that was exposed to the deep aquifer and returned to the shallow aquifer from the return water strainer, the aquifer to be taken is limited, and as a result, the desired, That is, there is a problem that the warmest groundwater cannot be used. As one means for solving such a problem, Japanese Patent Laid-Open Publication No. 50-158734 discloses a method of recovering geothermal energy for effectively utilizing a geothermal heat of a predetermined depth by providing a partition of a plug and a packer in a well. However, since the partition of the plug and the packer is a fixed type, there is a problem that geothermal heat having different depths cannot be effectively used.

An object of the present invention is to provide a well device that can utilize groundwater in a predetermined aquifer.

[Means and Actions for Solving Problems]

The present invention is directed to a water collecting pipe having a water absorption hole, upper and lower parts of the water collecting pipe corresponding to upper and lower parts of a predetermined aquifer, a lower water stop body, and heat exchange provided between these upper and lower water stop bodies. And a drainage channel connected to the heat exchanger, and a drainage channel. The upper and lower water stop bodies are formed to be expanded so as to be in close contact with the water collection pipe, and a supply pipe for an expansion gas or liquid. The groundwater heat can be utilized by changing the positions of the upper and lower partitions.

〔Example〕

1 to 5 show a first embodiment of the present invention, in which 1 is a first aquifer utilizing groundwater heat, and 2 is a second aquifer deeper than the first aquifer 1. is there. Reference numeral 3 denotes a water collecting pipe that prevents collapse of the well and collects water. A large number of water absorbing holes 4 are formed on the peripheral surface of the water collecting pipe 3. A heat exchanger 5 is provided in the area A corresponding to the first aquifer 1 of the water collection pipe 3. This heat exchanger 5 has a large-diameter flow-through pipe 6 provided in the center of the water collection pipe 3,
A plurality of return flow-through pipes 7 arranged annularly outside the flow-through pipe 6, and the flow-through pipes 6 and the return flow-through pipes 7
Consists of upper and lower communication parts 8 and 9 that connect the upper and lower ends,
The once-through pipe 6 is connected with a water supply pipe 10 which is a water supply passage reaching the above-ground B, while the upper communication portion 8 is connected with a drainage passage 11 reaching the above-ground B. The drainage channel 11 is composed of a jet pipe 12 connected to the upper communication portion 8 and a drain pipe 14 provided with a submersible pump 13 provided above the jet pipe 12. 8a and 9a are communication passages.

Further, the water collecting pipe 3 is provided above the first aquifer 1 in the water collecting pipe 3.
A bag-shaped water stop body 15 that is an upper partition body that can be brought into close contact with is provided integrally with the water supply pipe 10. As shown in FIG. 2, the upper bag-shaped water blocking body 15 is a flat donut-shaped hollow elastic body fixed to the water pipe 10 and sandwiched between the lower fixing plates 16 and 17, and includes air, water, oil, A supply pipe 18 for a gas or liquid for expansion such as gas, alcohol, chemicals, etc. is connected, and by expansion, it closely adheres to the inner surface of the water collection pipe 3 and separates the upper part of the water collection pipe 3 from the corresponding area A. .

On the other hand, in the first aquifer 1 in the water collection pipe 3, a lower bag-shaped water stop body 19 which is a lower partition body is provided. The lower bag-shaped water blocking body 19 is attached to the lower end of a mounting pipe 20 which is vertically provided below the lower communication portion 9, and is connected to the fluid supply pipe 18.

In addition, 21 is a fixed plate of the return flow-through pipe 7, 22 is connected to the upper end of the drain pipe 14, and a sprinkler pipe 23 for sprinkling water on the road or roof is connected to the upper end of the water supply pipe 10 for sprinkling the road or roof. It is a settling tank that collects the collected water.

Next, the operation of the above configuration will be described.

First, while arranging the upper and lower bag-shaped water stop bodies 15 and 19 above and below the first aquifer 1 corresponding area A of the water collection pipe 3, respectively,
The heat exchanger 5 is arranged in the middle between the upper and lower bag-shaped water blocking bodies 15 and 19. Then, the fluid is sent to the upper and lower bag-shaped water blocking bodies 15 and 19 through the supply tube 18 for the expanding gas or liquid, and the fluid is expanded and brought into close contact with the inner surface of the water collecting tube 3 to stop the water. After that, the water C on the ground is fed into the heat exchanger 5 through the water pipe 10. At this time, the groundwater D of the first aquifer 1 flows into the water collection pipe 3 through the water absorption holes 4, and the heat of the groundwater D is passed through the flow-through pipe 6, the return flow-through pipe 7, and the upper and lower communication parts 8, 9. Therefore, the water C, which has been heat-exchanged and is sent in, is heated. Then, the heated water C is ejected from the ejection pipe 12,
The water C that has accumulated on the upper bag-shaped water stop body 15 and has been heated by the submersible pump 13 is sent to the sprinkling pipe 23.

At this time, the groundwater E of the second aquifer 2, which has a low groundwater temperature, flows into the water collection pipe 3 through the water suction holes 4, but the lower bag-shaped water stop body 19 prevents the groundwater E from flowing, and the groundwater of the first aquifer 1 is grounded. Not mixed with D. Further, a part of the groundwater D of the first aquifer 1 passes through the communication passage 24 formed in the upper bag-shaped water stop body 15, collects on the upper bag-shaped water stop body 15, and is ejected from the ejection pipe 12 as water C.
At the same time, water is pumped through the drain pipe 14.

Further, when the groundwater E of the second aquifer 2 is used, the upper bag-shaped water stop body 15 is moved to the upper part of the second aquifer 2, etc.
Alternatively, a device with a different depth is newly inserted.

As described above, in addition to the partition bodies corresponding to the upper and lower portions of the first aquifer 1 to be heat-exchanged in the water collection pipe 3 having the water absorption holes 4,
In addition to providing the lower bag-shaped water blocking bodies 15 and 19, above these,
The heat exchanger 5 is provided in the middle of the lower bag-shaped water blocking bodies 15 and 19,
Moreover, by connecting the water pipe 10 and the drainage channel 11 to the heat exchanger 5, the groundwater D only in the first aquifer 1 can be collected, that is, the groundwater E in the second aquifer 2 is lower bag. The water stop bodies 19 prevent the inflow to the heat exchanger 5 side, so that the groundwater heat of only the desired first aquifer 1 can be used.

Further, by partitioning the water collecting pipe 3 by the inflatable bag-shaped water blocking bodies 15 and 19, it is possible to set the close contact with the water collecting pipe 3 at the time of insertion or withdrawal.

Moreover, since the heat exchanger 5 has the flow-through pipe 6 located at the central portion of the water collecting pipe 3 and the return flow-through pipe 7 arranged annularly outside the flow-through pipe 6, the heat transfer area can be increased. Heat can be exchanged efficiently.

Further, since the heat exchanger 5 is provided in the water collecting pipe 3, heat can be exchanged in the water collecting pipe 3 and the fear of freezing can be eliminated.

Although the present invention has shown that the inflow of groundwater in the aquifer deeper than the predetermined aquifer is suppressed, for example, the communication passage is eliminated as shown in FIG. 6, and the jet pipe 12a and the drain pipe 1 are provided.
4a is directly connected to prevent mixing of groundwater in an aquifer shallower than a predetermined aquifer, or a lower bag-shaped water stop body is provided separately from the water collection pipe, and the water absorption hole is permeable to water and has soil. There are various modifications such as coating a synthetic fiber cloth that does not pass through particles.

〔The invention's effect〕

The present invention is directed to a water collecting pipe having a water absorption hole, upper and lower parts of the water collecting pipe corresponding to upper and lower parts of a predetermined aquifer, a lower water stop body, and heat exchange provided between these upper and lower water stop bodies. And a drainage channel connected to the heat exchanger, and a drainage channel. The upper and lower water stop bodies are formed to be expanded so as to be in close contact with the water collection pipe, and a supply pipe for an expansion gas or liquid. Is a well device connected to the above, the upper and lower water stop bodies can be freely fixed to the water collection pipe corresponding to a predetermined aquifer, and as a result, heat exchange with groundwater of only the predetermined aquifer is possible. can do.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention. FIG. 1 is an explanatory sectional view of the whole, FIG. 2 is a longitudinal sectional view of an essential part, and FIG. 3 is I of FIG. -Cross-sectional view taken along the line I, and Fig. 4 is II- in Fig. 1-
II line sectional view, FIG. 5 is a III-III line sectional view of FIG. 1, 6
The figure is an overall explanatory sectional view showing a second embodiment of the present invention. 1 ... First aquifer, 3 ... Water collecting pipe, 4 ... Water absorption hole, 5 ...
… Heat exchanger, 10 …… Water pipe (water channel), 11 …… Drain channel, 15 …… Upper bag-shaped water stop (upper partition), 19 ……
Lower bag-shaped water stop (lower partition)

Claims (1)

[Claims] 1. A water collecting pipe having a water absorption hole, upper and lower parts of the water collecting pipe corresponding to upper and lower parts of a predetermined aquifer, a lower water stop body, and heat provided between the upper and lower water stop bodies. An exchange,
It has a water supply channel connected to this heat exchanger and a drainage channel,
The well device according to claim 1, wherein the upper and lower water stop bodies are formed to expand so as to be in close contact with the water collection pipe, and a supply pipe for an expansion gas or a liquid is connected to the water collection pipe.