Rainfall device

Abstract

To provide a simple rainfall device capable of accommodating rainfall with low rainfall intensity.SOLUTION: A rainfall device 1 is the rainfall device 1 for spraying rainfall water W onto a test piece 2, which is equipped with a water storage tank 10 for supplying the rainfall water W and a nozzle 20 for spraying the rainfall water W in an arc-shaped path toward the test piece 2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rain making device. [Background technology]

[0002] 2. Description of the Related Art Rainfall devices used for rainfall tests on test specimens such as vehicles have been known.

[0003] Patent Document 1 discloses a rainfall system in which four nozzles of different diameters are installed in the ceiling of an experimental building housing test specimens, and a rainfall unit equipped with a main pipe and branch pipes to supply water to each nozzle, and the nozzle discharge flow rate (rainfall amount) can be adjusted according to the experimental conditions. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-247322 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the rainfall system described in Patent Document 1, many main pipes and branch pipes must be installed in the ceiling of the experimental building, and the device configuration tends to be complicated. Furthermore, as shown in Figure 5(a), when the discharge pressure of the nozzle 100 is sufficiently large, the rainfall range is set to cover the entire test specimen 101, but as shown in Figures 5(b) and 5(c), the rainfall range shrinks or rainfall becomes impossible as the discharge pressure of the nozzle 100 decreases, so there is a risk that an appropriate rainfall range cannot be secured for the test specimen 101, especially in a rainfall experiment that reproduces rainfall with low rainfall intensity.

[0006] Therefore, a technical problem arises that must be solved in order to provide a simple rainfall device that can also handle rainfall of low intensity, and the object of the present invention is to solve this problem. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the rainfall apparatus of the present invention is a rainfall apparatus that sprays rainfall water onto a test specimen, and is equipped with a water supply source that supplies the rainfall water, and a nozzle that sprays the rainfall water toward the test specimen in an arc-shaped trajectory.

[0008] In addition, the rainfall test according to the present invention preferably further comprises a perforated plate provided on the track of the rainfall water to reduce the amount of rainfall of the rainfall water.

[0009] In addition, the rainfall test according to the present invention preferably further comprises a swing mechanism capable of swinging up and down the discharge direction in which the nozzle discharges the rainfall water. Effect of the Invention

[0010] The present invention makes it possible to adjust the amount of rainfall per unit area of ​​rainwater sprayed in an arc from the nozzle depending on the inclination of the nozzle, and therefore can accommodate rainfall experiments of various rainfall intensities with a simple configuration. [Brief description of the drawings]

[0011] [Figure 1] 1 is a schematic diagram showing a rain making device according to an embodiment of the present invention; [Diagram 2] FIG. 11 is a schematic diagram showing how the rainfall range changes depending on the nozzle discharge angle. [Diagram 3] Schematic diagram showing how a perforated plate reduces rainfall. [Figure 4] 5A and 5B are schematic diagrams showing how a swing mechanism changes the discharge angle of a nozzle. [Diagram 5] 1 is a schematic diagram showing how the rainfall range changes depending on the nozzle discharge pressure in a conventional rainfall system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An embodiment of the rainfall device according to the present invention will be described with reference to the drawings. In the following, when the number, value, amount, range, etc. of components are mentioned, the number is not limited to the specific number, and may be more or less than the specific number, unless otherwise specified or when it is clearly limited to a specific number in principle.

[0013] In addition, when referring to the shape or positional relationship of components, etc., this includes things that are substantially similar or approximate to those shapes, etc., unless otherwise specified or considered to be clearly different in principle.

[0014] In addition, the drawings may exaggerate characteristic parts to make the features easier to understand, and the dimensional ratios of the components may not be the same as in reality.

[0015] First, a rain making apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings.

[0016] The rainfall device 1 is installed in an experimental building 3 that houses a test specimen 2, and sprays rainwater W onto the test specimen 2. The rainfall device 1 includes a water storage tank 10 as a water supply source, a nozzle 20, and a water supply hose 30 that connects the water storage tank 10 and the nozzle 20.

[0017] The water storage tank 10 is provided near the experimental building 3 and stores the rainwater W. The water storage tank 10 is provided with a temperature sensor, a cooler, or a heater (not shown), and is configured to be able to control the temperature of the rainwater W according to the experimental conditions of the rainfall experiment.

[0018] The nozzles 20 are provided on the bottom or side of the experimental building 3, and are provided so that the direction of the rainwater W discharged from the nozzles 20 is inclined with respect to the vertical direction. That is, the nozzles 20 spray the rainwater W in an arc-shaped trajectory toward the test specimen 2. Note that, depending on the size and shape of the test specimen 2, the nozzles 20 may be added so that the rainfall range is set to cover the test specimen 2.

[0019] The direction of the rainwater W discharged from the nozzle 20 can be adjusted as desired, and as shown in Fig. 2(a), when the discharge direction D of the rainwater W is made closer to the vertical, the rainfall range becomes narrower, and as shown in Fig. 2(b), when the discharge direction D of the rainwater W is made closer to the horizontal, the rainfall range becomes wider. Note that the amount of rainfall within the rainfall range is approximately constant regardless of the angle of the discharge direction D of the rainwater W, so when the rainfall range is narrow as shown in Fig. 2(a), the amount of rainfall per unit area is large and the rainfall intensity is relatively high, and when the rainfall range is wide as shown in Fig. 2(b), the amount of rainfall per unit area is small and the rainfall intensity is relatively low.

[0020] The nozzle 20 is configured to be able to adjust the discharge pressure of the rainwater W. As the discharge pressure of the rainwater W decreases, the amount of rainfall within the rainfall range also decreases, so it is possible to adjust the amount of rainfall (rainfall intensity) of the rainwater W according to the experimental conditions of the rainfall experiment. The amount of rainfall according to the discharge pressure of the nozzle 20 is obtained in advance by experiments or the like. The configuration for controlling the discharge pressure of the nozzle 20 is known, and detailed description thereof will be omitted.

[0021] The water supply hose 30 is provided with a pump 31 that delivers rainwater W in the water storage tank 10 to the nozzle 20.

[0022] In this way, the rainfall device 1 of this embodiment is a rainfall device 1 that sprays rainfall water W onto the test specimen 2, and is configured to include a water storage tank 10 that supplies the rainfall water W, and a nozzle 20 that sprays the rainfall water W toward the test specimen 2 in an arc-shaped trajectory.

[0023] According to this configuration, the rainfall intensity of the rainwater W sprayed in an arc from the nozzle 20 can be adjusted according to the inclination of the nozzle 20, so that rainfall experiments with a variety of rainfall intensities can be performed with a simple configuration.

[0024] Next, a modification of the above-described embodiment will be described.

[0025] 3 is a schematic diagram showing a state in which the nozzle 20 sprays rainwater W onto the windshield of a vehicle as a specimen 2. In this modification, a porous plate 40 is provided on the trajectory of the rainwater W sprayed by the nozzle 20.

[0026] The perforated plate 40 has a lattice-like arrangement of numerous rectangular water passage holes 41 that allow the passage of rainwater W. The perforated plate 40 can reduce the amount of rainfall as the opening ratio becomes smaller. The shape and size of the water passage holes 41 can be changed as desired.

[0027] In this way, even if the rainfall intensity in the rainfall experiment is too low to be within the specified water pressure range of the nozzle 20 and the nozzle 20 alone cannot reproduce the rainfall, it is possible to conduct a rainfall experiment with a low rainfall intensity by reducing the rainfall intensity of the rainwater W according to the aperture ratio of the porous plate 40. The shape and arrangement of the water holes 41 and the aperture ratio of the porous plate 40 can be changed as desired according to the desired rainfall intensity.

[0028] 4 is a schematic diagram showing how the nozzle 20 is swung up and down. In this modification, a swing mechanism 50 is provided that swings the discharge direction D in which the nozzle 20 discharges the rainwater W up and down.

[0029] The swing mechanism 50 has a movable base 51 that can move back and forth using a link mechanism or the like, and in the initial position of the movable base 51, the nozzle 20 is placed facing diagonally upward, and the ejection direction D of the nozzle 20 is changed up and down by driving the movable base 51.

[0030] As the discharge direction D of the nozzle 20 approaches the vertical direction, the amount of rainfall sprayed on the test specimen 2 decreases, and as the discharge direction D of the nozzle 20 approaches the horizontal direction, the amount of rainfall sprayed on the test specimen 2 increases. In other words, the amount of rainfall water W sprayed on the test specimen 2 increases or decreases depending on the discharge direction D of the nozzle 20.

[0031] In this way, even if the rainfall intensity in a rainfall experiment is too low, falling below the specified water pressure range of the nozzle 20, and the nozzle 20 alone is unable to reproduce the rainfall, the swing mechanism 50 can adjust the rainfall intensity, making it possible to conduct a rainfall experiment with a low rainfall intensity.

[0032] In addition, the present invention can be modified in various ways other than those described above without departing from the spirit of the present invention, and the present invention naturally includes such modified versions. In addition, the embodiments and modifications may be combined as appropriate. [Explanation of symbols]

[0033] 1:Rainfall device 2: Specimen 3: Experimental building 10: Water tank 20: Nozzle 30: Water supply hose 31: Pump 40: Perforated plate 41: Water vent 50: Swing mechanism 51: Movable stand

Claims

1. A rainfall device for spraying rainwater onto a test specimen, A water supply source that supplies the rainwater; A nozzle that sprays the rainwater toward the test specimen in an arc-shaped trajectory; A rainfall device comprising:

2. 2. The rainmaking device according to claim 1, further comprising a perforated plate provided on a track of the rainfall water to reduce the amount of rainfall of the rainfall water.

3. 3. The rainmaking device according to claim 1, further comprising a swing mechanism for allowing the nozzle to swing up and down in a direction in which the nozzle discharges the rainwater.

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