JPH0449893Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention is a liquid level adjustment device that is combined with a liquid storage tank that is constantly supplied with liquid and that adjusts the liquid level of this liquid storage tank. In particular, the present invention relates to a liquid level adjusting device suitable for a hydroponic culture tank as a liquid storage tank.

[Technical background of the invention and its problems] For example, a hydroponic cultivation tank is known as a liquid storage tank that is constantly supplied with liquid. The culture solution required for this purpose is constantly supplied from the culture solution tank by a pump, and then returned to the culture solution tank from the hydroponic culture tank. In other words, the culture solution is circulated between the hydroponic cultivation tank and the culture solution tank, thereby constantly supplying new culture solution to the plants and efficiently promoting the growth of the plants. I'm starting to be able to do it.

By the way, in the above-mentioned hydroponic cultivation tank, it is necessary to adjust the level of the culture solution stored inside the tank according to the growth state of the plants, that is, their roots. A liquid level adjustment device is being considered. As one of these liquid level adjusting devices, a liquid level adjusting device disclosed in Japanese Utility Model Application Publication No. 113352/1988 is known. This liquid level adjustment device is constructed by arranging an expandable overflow pipe within the hydroponic cultivation tank. Therefore, by adjusting the height of the overflow port of the overflow pipe, the height of the overflow port of the overflow pipe can be adjusted. The liquid level within can be determined.

However, since the above-mentioned known liquid level adjusting device is placed inside a hydroponic culture tank,
It is not possible to easily adjust the liquid level. That is, the top surface of the hydroponic cultivation tank is always covered with a support plate to support the plants being cultivated, and the presence of this support plate allows the height of the overflow port in the overflow pipe to be adjusted. can't be done easily.

In addition, if an overflow pipe is placed in the hydroponic cultivation tank as described above, it is important to check whether the culture solution is being properly discharged from the overflow port of the overflow pipe, that is, whether the culture solution is being circulated properly. Not only is it not easy to see whether or not something has been done,
Furthermore, there is a risk that the overflow opening of the overflow pipe may be blocked by plant roots.

[Purpose of the invention] This invention was made based on the above-mentioned circumstances, and its purpose is to easily adjust the liquid level in the liquid storage tank and to improve the state of liquid supply to the liquid storage tank. To provide a liquid level adjusting device that can be easily and visually checked.

[Summary of the invention] The liquid level adjusting device of this invention includes a case that is placed near a liquid storage tank and can store liquid, and a first case that is placed inside the case and that is horizontally adjacent to the inside of the case. a partition plate that liquid-tightly partitions the chamber and the second chamber; a plurality of adjustment holes formed on the partition plate and spaced apart in the vertical direction and communicating the first chamber and the second chamber; A removable stopper that fluid-tightly closes these adjustment holes is connected between the first chamber and the bottom of the liquid storage tank, and the liquid in the liquid storage tank is connected to the first chamber and the bottom of the liquid storage tank.
It is configured to include a connecting pipe for guiding the liquid into the chamber, and a discharge hole formed in the outer wall of the case that partitions the second chamber and for discharging the liquid in the second chamber to the outside.

[Operation of the device] According to the liquid level adjusting device described above, since the liquid storage tank and the first chamber of the case are connected by the connecting pipe, the liquid in the liquid storage tank is also introduced to the first chamber. he,
Therefore, the liquid level in the liquid storage tank and in the first chamber are the same. As a result, the liquid level in the first chamber, that is, the liquid storage tank, can be adjusted by selectively removing one of the plugs of the adjustment holes formed in the partition plate inside the case.

In addition, since the above plugs can be fitted into any of a plurality of adjustment holes, it is also possible to fit these plugs into each adjustment hole and plug the adjustment hole corresponding to the position of the liquid level to be adjusted. By selectively removing the
The liquid level can be easily set. By selecting the adjustment hole from which the stopper is to be removed, the setting of the liquid level can be easily changed. Furthermore, since these plugs are common and can fit into any adjustment hole, there is no need to prepare different types of plugs depending on the liquid level, and it is not necessary to change the set value of the liquid level. This can be done by simply changing the position of the fitting plug, so
You will never lose this stopper.

[Embodiment of the invention] An embodiment of the invention will be described below based on the drawings.

A in the figure schematically shows a part of the hydroponic cultivation tank as a liquid storage tank. This hydroponic cultivation tank A is constantly supplied with a culture solution from a culture solution tank B via a pump, a supply pipe, and the like. Pumps and feed pipes are not shown in the drawings.

A liquid level adjustment device is arranged near the hydroponic cultivation tank A. This liquid level adjustment device is
It has a box-shaped case 1 with an open top.
The upper opening of the case 1 can preferably be closed by a lid 2. A partition plate 3 is arranged inside the case 1. This partition plate 3 is
The inside of the case 1 is liquid-tightly partitioned into a first chamber 4 and a second chamber 5. These first and second chambers 4 and 5 are arranged side by side in the horizontal direction, as shown in the drawing.

A plurality of adjustment holes 6 are formed in the partition plate 3. In this embodiment, these adjustment holes 6...
are arranged on the diagonal of the partition plate 3 at predetermined intervals. Here, the case 1 is arranged so that the adjustment hole 6 located at the lowest position and the bottom surface of the hydroponic cultivation tank A are approximately at the same height level.

A plug 7 is removably fitted into each adjustment hole 6, and the plug 7 can close the adjustment hole 6 in a liquid-tight manner. Here, each stopper 7
is made of an elastic sealing material.

One end of a connecting pipe 8 is connected to the lower part of the first chamber 4 in the case 1 near the bottom of the first chamber 4, and the other end of the connecting pipe 8 is connected to the hydroponic cultivation tank A. It is connected to the bottom of the tank A and is opened to this hydroponic cultivation tank A. Therefore, the culture solution in the hydroponic cultivation tank A is guided into the first chamber 4 of the case 1 through the connecting pipe 8, thereby causing a connection between the inside of this first chamber 4 and the inside of the hydroponic cultivation tank A. The liquid level will be the same.

On the other hand, a discharge hole 9 is formed in the bottom wall of the second chamber 5 of the case 1 . One end of a discharge pipe 10 is connected to this discharge hole 9, and the other end of this discharge pipe 10 is connected to the culture solution tank B described above. Further, a through hole is formed in the bottom wall of the first chamber 4 as required, and this through hole is always closed in a fluid-tight manner by a plug 11.

According to the liquid level adjusting device described above, among the plugs 7 that close the adjustment holes 6 of the partition plate 3, the plugs 7 at a desired height level are removed as shown in the drawing, and the adjustment holes 6 are removed. By releasing this, the culture solution in the first chamber 4 can escape to the second chamber 5 from the opened adjustment hole 6. Therefore, even if the culture solution is constantly supplied to the hydroponic cultivation tank A, the liquid level in the first chamber 4 that is in communication with the hydroponic cultivation tank A, that is, the liquid level in the hydroponic cultivation tank A The liquid level will not rise above the above-mentioned release adjustment hole 6, and will be maintained at the level of this release adjustment hole 6. The culture solution that has flowed into the second chamber 5 is returned to the culture solution tank B through the discharge hole 9 and the discharge pipe 10.

Therefore, the liquid level in the hydroponic cultivation tank A can be easily adjusted by simply selecting the adjustment hole 6 to be opened depending on the growth state of the plants in the hydroponic cultivation tank A.

In addition, the liquid level adjusting device of this invention has a structure in which adjustment holes 6 are formed in the partition plate 3 and these adjustment holes 6 are closed with plugs 7, so the structure is very simple. Moreover, since each adjustment hole 6 can be opened and closed very easily, the liquid level of the hydroponic cultivation tank A can be easily adjusted.

Furthermore, since the liquid level adjustment device of this invention is placed outside the hydroponic cultivation tank A, even if the hydroponic cultivation tank A is covered with the support plate described above, the liquid level adjustment device in the case 1 is Supply of the culture solution to the hydroponic cultivation tank A can be confirmed by simply checking the culture solution flowing out from the first chamber 4 to the second chamber 5.

In this embodiment, the other end of the connecting pipe 8 is connected to the bottom of the hydroponic cultivation tank A, and the adjustment hole 6 located at the lowest position and the bottom of the hydroponic cultivation tank A are at the same height. Since it is arranged at a level, all the culture solution in the hydroponic cultivation tank A can be discharged by opening the adjustment hole 6 located at the lowest position. Therefore, it is not necessary to separately provide a drain port or other discharge means in the hydroponic cultivation tank A.

This invention is not limited to the one embodiment described above. For example, in the above embodiment, the adjustment holes are formed at predetermined intervals on the diagonal of the partition plate, but these adjustment holes are formed at predetermined intervals in the vertical direction of the partition plate. You may also do so. Alternatively, they may be distributed and arranged on the partition plate. Furthermore, if each stopper 7 is colored and coded, and the color coding is associated with the liquid level in the hydroponic cultivation tank, the liquid level can be adjusted even more easily.

[Effects of the invention] According to the liquid level adjusting device of this invention, a partition plate is disposed in the case to partition the first chamber and the second chamber, and a plurality of adjustment holes are provided in the vertical direction in the partition plate. The structure is very simple because the adjustment holes are removably closed with plugs, and the liquid level can be easily adjusted by simply attaching and removing the desired plugs. It becomes possible to do so. Furthermore, whether or not liquid is constantly being supplied to the liquid storage tank can be easily confirmed by checking whether or not liquid is flowing out from the first chamber to the second chamber.

Further, by selectively removing the stopper of the adjustment hole corresponding to the position of the liquid level to be adjusted, the liquid level can be easily set. and,
By selecting the adjustment hole from which the stopper is to be removed, the setting of the liquid level can be easily changed. Furthermore, since these plugs are common and can fit into any adjustment hole, there is no need to prepare different types of plugs depending on the liquid level, and it is not necessary to change the set value of the liquid level. This is done by simply changing the position of the fitting plug, so there is no chance of losing the plug.

[Brief explanation of the drawing]

The drawing is a partially cutaway perspective view of a liquid level adjusting device according to an embodiment of the invention. 1... Case, 3... Partition plate, 4... First
Chamber, 5... Second chamber, 6... Adjustment hole, 7... Plug, 8
... Connection pipe, 9 ... Discharge hole, A ... Hydroponic cultivation tank (liquid storage tank).

Claims (1)

[Scope of Claim for Utility Model Registration] A liquid level adjustment device for adjusting the liquid level of a liquid storage tank that is constantly supplied with liquid, which is disposed near the liquid storage tank and is capable of storing liquid. a partition plate disposed within the case and liquid-tightly partitioning the inside of the case into horizontally adjacent first and second chambers; A plurality of adjustment holes are formed to communicate the first chamber and the second chamber, and at least the adjustment holes other than the adjustment holes at positions corresponding to the liquid level to be adjusted are made liquid-tight and selectively removed. A case that partitions the second chamber into a connecting pipe that connects the first chamber and the bottom of the liquid storage tank and leads the liquid in the liquid storage tank to the first chamber. 1. A liquid level adjusting device comprising: a discharge hole formed in an outer wall of the second chamber for releasing liquid from the second chamber to the outside.