JPH0449647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in test tanks.

In various tests conducted using test tanks, the depth of the bottom of the tank may be set to a desired value in order to investigate the effect of water depth on water currents or waves. The test tank is made deep enough to avoid any effects from the bottom of the tank in ship propulsion performance tests, etc., which are normally conducted on the water surface. Therefore, the quickest way to change the water depth for these tests to investigate the effect of water depth is to increase or decrease the amount of water in the aquarium, but water is often wasted, and In particular, if too much water is drained to make the water shallow, there is a risk that a measuring device mounted on a towing truck or the like that runs on the upper side wall of the tank may become unusable.

In such cases, conventionally, the side view in Figure 1 and the side view in Figure 2 are
As shown in the enlarged perspective view of the figure, it consists of a horizontal member 0.5, a support member 0.7, a diagonal member 0.8, etc., with a height adjustment screw 011,
A plurality of underframes each equipped with a foot board 010 are arranged side by side on a water tank bottom 02 and connected by a connecting plate 06, and a temporary bottom plate 01 is fixed on the underframe so as not to float by a weight 09.

However, as the test tank is used not only for tests that examine the effect of water depth as described above, but also for tests that do not have an effect on water depth, it is better to conduct tests that require the water depth to be deep enough to avoid the effects of the bottom of the tank. Therefore, the above-mentioned method has the following disadvantages in changing the water depth only for a certain period of time.

(1) Carrying the underframe into and out of the test tank is extremely complicated and time consuming.

(2) Finishing the temporary bottom structure requires adjustment work such as laying a temporary bottom plate, adjusting vertical dimensions, and aligning on-site.

(3) There is a significant risk that the underframe will be deformed due to collisions, etc. during loading and unloading, and reproducibility during resetting is extremely low.

(4) When not in use, the underframe is transported out of the aquarium and requires a significantly large amount of space for storage.

(5) Test tanks with vast water surfaces always require temporary bottom connection work in the plane.

(6) Metal is recommended as the material, but since it is carried into the air when not in use and brought into the water when in use, it is frequently brought in and out of water, resulting in significant corrosion.

(7) A transporter crane that can cover a wide area is required for loading and unloading.

The present invention was proposed in view of the above circumstances, and aims to provide a variable depth test tank that has a long service life and is easy to handle. a parallel link mechanism that supports the temporary bottom plate by moving it up and down underwater in a substantially parallel state to the bottom of the tank; and a temporary bottom support member which is pivotally supported on the side wall of the aquarium or the bottom of the aquarium, and whose other end removably abuts the end of the temporary bottom plate directly or through a spacer to hold the temporary bottom plate in a predetermined amount of water. The purpose is to provide a test water tank in which the effective water depth of the test water area can be changed freely and easily without the need to pour water into the test water tank.

The present invention will be described below with reference to an embodiment of the apparatus shown in FIGS. 3 to 6.

In the figure, 2 is the bottom of the test tank, 3 is the water surface,
Reference numeral 4 denotes a pair of temporary bottom plates immersed in water and parallel to the aquarium bottom 2, with pins 5 disposed on the aquarium bottom 2.
and a pin 6 disposed on the lower surface of the temporary bottom plate 4, a link arm 7 is pivotally supported. Since the distances between these pins 5 or 6 are equal and the lengths of the link arms 7 are also equal, a parallel link mechanism is constructed.

Note that a cylindrical receiver 4a is formed on the end surface of the temporary bottom plate 4 to engage with a cylindrical member 9 of a temporary bottom support member 8, which will be described later.

The temporary bottom support member 8 has a width equal to the width of the temporary bottom plate 4, one end of which is pivotally supported by a pin 10 provided on the side wall 1 of the test tank, and the other end of which is supported by the cylindrical column of the temporary bottom plate 4. A cylindrical member 9 that engages with the receiver 4a is attached,
Can swing vertically.

Now, it is assumed that the pin 5 is installed on the bottom 2 of the aquarium with an anchor bolt or the like, and that the temporary bottom plate 4 is in the position shown in FIG. 3 with the link arm 7 folded down.

When the temporary bottom plate 4 is lifted with a winch or the like, the link arm 7 rotates about the pins 5 and 6, but since a parallel link mechanism is configured, the temporary bottom plate 4 moves in parallel.

On the other hand, when the temporary bottom support member 8 is swung around the pin 10 to lift up the end, and the cylindrical member 9 is engaged by fitting it into the cylindrical support 4a formed at the end of the temporary bottom plate 4, as shown in FIG. As shown, the temporary bottom plate 4 is fixed floating above the aquarium bottom 2.

If it is necessary to smooth the joint between the temporary bottom plate 4 and the temporary bottom support member 8 and close the gap, a hinge 11 is attached to the temporary bottom plate 4 as shown in FIG.
Attach the rubber sheet 1 fixed to this hinge.
2 may be fixed to the surface of the temporary bottom support member 8.

Therefore, by appropriately setting the lengths of the link arms 7, the lengths and mounting positions of the temporary bottom support members 8, the temporary bottom plate 4 can be placed at any desired height. , has the following effects.

(1) The trouble of carrying the temporary bottom plate frame into and out of the aquarium is completely eliminated.

(2) In principle, no on-site adjustment work will be required when erecting the temporary bottom plate underframe.

(3) Problems such as collisions, deformation, and poor reproducibility of temporary bottom plates during loading and unloading will be completely eliminated.

(4) When the temporary bottom plate is not used, there is no need for a spacer to store the frame etc. outside the aquarium.

(5) Even in an aquarium with a vast water surface, a temporary bottom can be constructed by simple operations.

(6) The height of the temporary bottom plate 4 etc. can be made very low by folding the parallel link mechanism, so it can be kept underwater at all times, so it is less likely to corrode than conventional ones even if they are made of the same material. The possibility of progress is
significantly lower.

(7) The temporary bottom can be set by simply indexing or fishing the temporary bottom plate 4 and support member 8 from a certain direction where the winch is placed, and since a simple winch is sufficient, a vast planar area can be covered. Transporter cranes etc. will no longer be necessary. In addition, when creating waves in the aquarium constructed in this way, a wave-making plate is installed at the right end of Fig. 4. At this time, the right-hand end of the temporary bottom plate 4 is positioned in front of the wave-making plate. However, the wave-making plate and temporary bottom plate 4
Since the temporary bottom support member 8 is disposed watertightly between the temporary bottom support member 8 and
You will be guided smoothly.

As mentioned above, the height of the temporary bottom plate 4 is determined by the length of the link arm 7 and the temporary bottom support member 8, or the height at which they are installed. It would be a good idea to change one thing. The simplest method is to change the length of the temporary bottom support member 8, and this is done by interposing a spacer between it and the temporary bottom plate 4.

Although illustration of the spacer is omitted, a cylindrical member that fits into the cylindrical receiver 4a of the temporary bottom plate 4 and a cylindrical receiver that engages with the cylindrical member 9 of the temporary bottom support member 8 may be provided at both ends of the spacer, respectively. This is the translation. The height of the temporary bottom plate 4 can be changed freely by preparing spacers of different lengths and selecting one as required. Further, if the spacer is made of a soft material, damage to the temporary bottom plate 4 or the temporary bottom support member 8 can be prevented.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view showing a known test tank;
The figure is an enlarged perspective view showing the underframe of Figure 1, Figures 3 and 4 are diagrams of a test tank showing an embodiment of the present invention, Figure 3 is a diagram with the temporary bottom plate folded, and Figure 4 is FIG. 5 is a diagram showing the state of use, FIG. 5 is a diagram showing the connection state of the temporary bottom plate and the temporary bottom support member, and FIG. 6 is a diagram showing FIG. 5 covered with a rubber sheet. 1...Side wall, 2...Aquarium bottom, 3...Water surface, 4...
...Temporary bottom plate, 4a...Cylindrical holder, 5, 6...Pin, 7
... Link arm, 8 ... Temporary bottom support member, 9 ... Cylindrical material, 10 ... Pin, 11 ... Hinge, 12 ... Rubber sheet.

Claims (1)

[Claims] 1 Consisting of a temporary bottom plate immersed in water and a plurality of link arms, one end of which is pivoted to the bottom of the aquarium and the other end of which is pivoted to the lower surface of the temporary bottom plate, the temporary bottom plate is held approximately parallel to the bottom of the aquarium. A parallel link mechanism is used to move the temporary bottom plate up and down in the water. A test water tank characterized by comprising a temporary bottom support member for holding the test water tank.