Water splash prevention cover

Abstract

To provide a drainage guide member which can prevent adhering water from being frozen and guide and drain the water even in a state that an air temperature is low as in winter season.SOLUTION: A drainage guide member 2 includes: an inclined surface part 4 which receives water; and a vertical surface part 5 which is provided continuously from a lower end edge part of the inclined surface part 4 and vertically extends downward. The drainage guide member 2 prevents adhering water from being frozen and guides and drains the water.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a drainage guide member that guides the water sprayed by a sprinkler device to a desired area and drains it without freezing the water during a period when the temperature is low, for example.

Background Art

[0002] Conventionally, in railway vehicles, when snow that blows up during winter driving adheres to the lower part of the vehicle, the adhered snow forms lumps and falls into the track, causing the ballast to bounce up, and in this case, the ballast may come into contact with the equipment attached to the lower part of the vehicle, resulting in damage and failure of the equipment. To avoid this, the speed of the railway vehicle has to be reduced during driving, which poses a problem of hindering operation.

[0003] To address this, it is generally practiced to spray water into the track using a sprinkler device during snowfall to melt the snow on the track. The sprinkler device is provided with injection nozzles that spray water laterally, and by spraying water while rotating 360 degrees around a rotation axis extending vertically, the snow accumulated on the track is melted over a wide area.

[0004] By the way, since the above-described sprinkler device needs to be disposed on the side of the track so as not to interfere with the running of the vehicle, in an area where it is necessary to only sprinkle water within the track and prevent water from scattering outside the track, for example, it is necessary to dispose a water scattering prevention cover disclosed in Patent Document 1 on the side of the injection nozzle. The water scattering prevention cover includes an inclined surface portion extending obliquely downward on the injection nozzle side, and a cover plate that extends vertically upward from both side edges and the upper edge of the inclined surface portion and forms a substantially U shape in plan view. The water sprayed from the injection nozzle is received by the cover plate and dropped downward, and then drained from the lower edge of the inclined surface portion to the track side along the inclined surface portion, so that it is considered that the scattering of water outside the track is prevented.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 6-320080 [Summary of the Invention] [Problems to be Solved by the Invention]

[0006] However, when the water scattered prevention cover disclosed in Patent Document 1 receives the water jetted from the injection nozzle in a state where the air temperature is low, when the water drips from the lower end edge of the inclined surface portion, it is exposed to the cold air and freezes. As this freezing is repeated and it gradually grows downward in a rod shape, an icicle is formed, and there is a risk that the area below the sprinkler device will become a dangerous area. The same can be said for drainage guide members applied to other parts and devices such as roofing materials and drainage mechanisms in cold regions, for example.

[0007] The present invention has been made in view of such points, and an object thereof is to provide a drainage guide member capable of guiding and draining the adhering water without freezing it even in a state where the air temperature is low like in winter. [Means for Solving the Problems]

[0008] In order to achieve the above object, the present invention is characterized in that by devising the shape on the downstream side of the inclined surface portion in the drainage guide member, it is difficult to form an icicle.

[0009] Specifically, for a drainage guide member that guides and drains the adhering water without freezing it, the following solution means were taken.

[0010] That is, in the first invention, it is characterized by including an inclined surface portion that receives the water, and a vertical surface portion that is continuously provided at the lower end edge of the inclined surface portion and extends vertically downward.

[0011] In the second invention, in the first invention, at least one of the inclined surface portion and the vertical surface portion is made of a titanium material.

[0012] In the third invention, the water splash prevention cover includes the drainage guide member of the first or second invention, and a cover plate that is provided above the inclined surface portion and surrounds a water injection space in which an injection nozzle of a sprinkler device that sprays water while rotating around a vertically extending rotation axis is disposed.

[0013] In the fourth invention, in the third invention, the cover plate includes a first plate that extends vertically upward from the upper end edge portion of the inclined surface portion, and a pair of second plates that extend upward from each side edge portion of the inclined surface portion and are also continuous with each side edge portion of the first plate.

Advantages of the Invention

[0014] In the first invention, since the vertical surface portion continuous with the inclined surface portion has a larger angle with respect to the horizontal plane than the inclined surface portion, when the water received by the inclined surface portion is guided by the inclined surface portion and passes through the lower end edge portion of the inclined surface portion and reaches the vertical surface portion, the moving speed of the water changes, and thereby the water rushes and falls from the lower end edge portion of the vertical surface portion. Therefore, it is possible to prevent the heat of the water from being taken away by the inclined surface portion and frozen by becoming water droplets and remaining due to surface tension at the lower end edge portion of the inclined surface portion. Even in a state where the temperature is low like in winter, the attached water can be drained without being frozen.

[0015] In the second invention, for example, since the heat capacity is smaller than when a drainage guide member is made of a stainless steel material or the like, it becomes difficult for the heat of the water adhering to the inclined surface portion or the vertical surface portion to be taken away by the inclined surface portion or the vertical surface portion, and it becomes difficult to freeze. Also, since the corrosion resistance is good, it is unlikely that the surface of the inclined surface portion or the vertical surface portion will rust and become uneven. Therefore, even when the drainage guide member is used for a long period of time, the adhering water can be smoothly guided and discharged, and it can be made difficult for the water to have its heat taken away and freeze in the middle of the inclined surface portion or the vertical surface portion. Furthermore, since the titanium material has a small heat capacity, it is likely to have its temperature increased by sunlight. Therefore, it becomes difficult for the temperature of the water flowing along the inclined surface portion or the vertical surface portion to decrease, and it can be made difficult to freeze the water on the inclined surface portion or the vertical surface portion. In addition, since it is not necessary to coat the surface of the inclined surface portion or the vertical surface portion with an antifreezing agent, maintenance work such as periodically reapplying the antifreezing agent becomes unnecessary, not only does the cost not increase, but a drainage guide member that is easy to handle can be obtained.

[0016] In the third invention, for example, when a water splash prevention cover is disposed on the side of the track, the cover plate prevents the water sprayed from the injection nozzle of the sprinkler device from jumping out of the track. Then, the water adhering to the cover plate is guided toward the track side along the inclined surface portion extending obliquely downward on the track side. In this way, it is possible to reliably prevent the water sprayed from the injection nozzle from flowing out of the track.

[0017] In the fourth invention, since the side of the injection nozzle is surrounded by a first plate and two second plates by about 180 degrees, for example, when a water splash prevention cover is disposed on the side of the track, it is possible to reliably prevent the water sprayed from the injection nozzle of the sprinkler device from jumping out of the track.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiments is merely illustrative in nature.

[0020] FIG. 1 shows a sprinkler device 10 provided with a splash water prevention cover 1 according to an embodiment of the present invention. The sprinkler device 10 is disposed on the side of a track in a railway vehicle such as a bullet train, and sprays water during snowfall to melt the snow accumulated on the track, and is provided with an injection nozzle 11 that sprays water while rotating around a vertically extending rotation axis C1.

[0021] One end of a pipe 12 extending in a substantially L shape is connected to the injection nozzle 11, and a pump (not shown) for supplying water to the injection nozzle 11 is connected to the other end of the pipe 12.

[0022] The splash water prevention cover 1 is supported by a support frame 13 extending vertically, and surrounds the area on the side opposite to the track in the injection nozzle 11 and the lower part of the injection nozzle 11, respectively.

[0023] The splash water prevention cover 1 is formed of a titanium material, and as shown in FIGS. 2 and 3, includes a drainage guide member 2 disposed below the injection nozzle 11 and a cover plate 3 surrounding the water injection space S1 in which the injection nozzle 11 is disposed.

[0024] The drainage guide member 2 includes an inclined surface portion 4 that extends obliquely downward toward the track side and guides the received water to the track side, and a vertical surface portion 5 that is continuously provided at the lower end edge of the inclined surface portion 4 and extends vertically downward. The vertical surface portion 5 has a shape that extends in a strip shape in the horizontal direction.

[0025] The inclined surface portion 4 includes a first inclined portion 6 having a rectangular plate shape, and a pair of second inclined portions 7 that extend upward while being spaced apart from each other from the respective side edges of the first inclined portion 6. Each second inclined portion 7 has a triangular shape in plan view. That is, the inclined surface portion 4 has a wide cross-sectional substantially U-shaped formed by three flat surfaces.

[0026] On the other hand, the cover plate 3 has a substantially U-shaped in plan view and forms a shape that surrounds an area on the opposite side of the track in the water injection space S1 by about 180°.

[0027] The cover plate 3 includes a first plate 8 that extends vertically upward from the upper end edge of the inclined surface portion 4, and a pair of second plates 9 that extend upward from the respective side edges of the inclined surface portion 4 and are also continuous with the respective side edges of the first plate 8. A through hole 8a for inserting the pipe 12 is formed at the lower center of the first plate 8.

[0028] The water splash prevention cover 1 receives the water sprayed from the injection nozzle 11 with the cover plate 3 and drops it downward, and guides the water received by the drainage guide member 2 to the lower end edge of the vertical surface portion 5 and drops it from the drainage guide member 2 to drain the water.

[0029] Here, in order to confirm the freezing prevention ability of the drainage guide member 2 according to the embodiment of the present invention, as shown in FIG. 4, a specimen T1 imitating the drainage guide member 2 was created and a freezing prevention experiment A was carried out.

[0030] The anti-freezing experiment A is mainly an experiment for confirming the effect of the vertical surface portion 5 provided on the drainage guide member 2. Specimens T1 with a longitudinal dimension of 100 mm, a width dimension of 50 mm, and a plate thickness of 2 mm were prepared from both titanium and stainless steel materials. Each specimen T1 was exposed to a low-temperature atmosphere, and water was periodically sprayed onto each specimen T1 to examine the number of icicles formed at the lower edge of the specimen T1. As test conditions, water was sprayed every 15 minutes, and the state of each specimen T1 after 120 minutes was confirmed. Data was obtained by changing the cooling temperature and the installation angle of the specimen T1 respectively. In order to simulate the passing of a railway beside the splash water prevention cover 1, data was obtained for both cases where vibration was periodically applied to the specimen T1 using a vibration motor and where no vibration was applied. Also, after confirming the state of each specimen T1 after 120 minutes, the time until all the adhering ice melted was measured for each specimen T1.

[0031] Figure 5 shows the results of the anti-freezing experiment A. It was found that although the melting temperature of the ice differed when the cooling temperature changed, there was no significant difference in the number of icicles formed. It was also confirmed that the presence or absence of vibration did not have a significant impact on the formation of icicles. Furthermore, it was found that it was more difficult for icicles to form on the specimen T1 made of titanium material than on the specimen T1 made of stainless steel material.

[0032] And when comparing Experiment 3 with other experiments, it was found that it was more difficult for icicles to form by arranging the specimen T1 vertically compared to the state where the specimen T1 was tilted at 45 degrees. This is presumably because the angle of the vertical surface with respect to the horizontal plane is larger than that of the inclined surface, so the moving speed of the adhering water becomes faster and it tends to fall from the lower edge of the vertical part.

[0033] Therefore, as in the embodiment of the present invention, when a vertical surface portion 5 that extends vertically continuously is provided at the lower end edge of the inclined surface portion 4 in the drainage guide member 2, the water received by the inclined surface portion 4 is guided by the inclined surface portion 4, passes through the lower end edge of the inclined surface portion 4, and reaches the vertical surface portion 5, the moving speed of the water changes, and thereby the water rushes and falls from the lower end edge of the vertical surface portion 5. Therefore, it is possible to prevent the water from becoming water droplets and staying due to surface tension at the lower end edge of the inclined surface portion 4, and the heat of the water being taken away by the inclined surface portion 4 and freezing. Even in a state where the temperature is low like in winter, it is possible to drain the adhering water without freezing it.

[0034] Next, in order to confirm the anti-freezing ability due to the difference in the material of the water splash prevention cover 1, a freezing prevention experiment B was carried out by preparing water splash prevention covers 1 with different materials and surface treatments.

[0035] The freezing prevention experiment B is an experiment for confirming the effect due to the difference in the material of the water splash prevention cover 1. Each test specimen T2 made of stainless steel, a highly corrosion-resistant plated steel sheet, and a titanium material was prepared. The one formed of the highly corrosion-resistant plated steel sheet was subjected to a fluororesin coating for skiing on its surface. Then, each test specimen T2 was exposed to a low-temperature atmosphere, and water was periodically sprayed on each test specimen T2 to examine the number of icicles formed at the lower end edge of each test specimen T2. In addition, as test conditions, each test specimen T2 was exposed to a low-temperature atmosphere of -5°C, and 500 cc of water was sprayed 7 times every 60 minutes using a sprayer on each test specimen T2 to check the state of each test specimen T2. In order to simulate the passing of a railway beside the water splash prevention cover 1, vibration was applied to the test specimen T2 using a vibration motor for 3 minutes 30 minutes after spraying water to obtain data. Further, after each test specimen T2 was cooled for 24 hours, the time until all the ice adhering to each test specimen T2 melted was measured for each test specimen T2.

[0036] FIG. 6 shows the results of the anti-freezing experiment B. When the water splash prevention cover 1 is formed of a titanium material, it is difficult to form icicles. Also, even if ice adheres to the specimen T2, it was found that the ice adhering to the surface melts quickly if it is formed of a titanium material. This is presumably due to the low thermal conductivity and small heat capacity of the titanium material, and furthermore, its property of being difficult to rust.

[0037] Therefore, when the water splash prevention cover 1 is formed of a titanium material as in the embodiment of the present invention, the heat capacity becomes smaller compared to the case where the drainage guide member 2 is manufactured from a stainless steel material or the like, for example. Thus, the heat of the water adhering to the inclined surface portion 4 or the vertical surface portion 5 is difficult to be taken away by the inclined surface portion 4 or the vertical surface portion 5, and it becomes difficult to freeze. Also, since the corrosion resistance is good, it is unlikely that the surface of the inclined surface portion 4 or the vertical surface portion 5 rusts and becomes an uneven surface. Therefore, even when the drainage guide member 2 is used for a long period of time, the adhering water can be smoothly guided and discharged, and it is possible to prevent the water from being deprived of heat and frozen in the middle of the inclined surface portion 4 or the vertical surface portion 5. Furthermore, since the titanium material has a small heat capacity, the temperature is likely to rise due to sunlight. Therefore, it becomes difficult for the temperature of the water flowing along the inclined surface portion 4 or the vertical surface portion 5 to decrease, and it becomes difficult to freeze the water on the inclined surface portion 4 or the vertical surface portion 5. In addition, since it is not necessary to coat the surface of the inclined surface portion 4 or the vertical surface portion 5 with an anti-freezing agent, maintenance work such as periodically reapplying the anti-freezing agent becomes unnecessary, not only does the cost not increase, but a drainage guide member 2 that is easy to handle can be obtained.

[0038] From the above, the drainage guide member 2 of the embodiment of the present invention can drain the adhering water without freezing even in a state where the temperature is low, such as in winter.

[0039] In addition, for example, since the water splash prevention cover 1 of the embodiment of the present invention is disposed on the side of the track, the cover plate 3 prevents the water sprayed from the injection nozzle 11 of the sprinkler device 10 from splashing outside the track. Then, the water adhering to the cover plate 3 is guided toward the track side along the inclined surface portion 4 extending obliquely downward on the track side. In this way, it is possible to reliably prevent the water sprayed from the injection nozzle 11 from flowing out of the track.

[0040] Furthermore, since the side of the injection nozzle 11 is surrounded by the first plate 8 and the two second plates 9 by about 180 degrees, it is possible to reliably prevent the water sprayed from the injection nozzle 11 of the sprinkler device 10 from splashing outside the track.

[0041] In the embodiment of the present invention, the water splash prevention cover 1 is formed of a general titanium material. However, for example, a heat storage ceramic material (refer to the thesis of the University of Tokyo: External stimulation-controllable heat-storage ceramics) that can release the absorbed heat by applying a weak pressure may be used to form the water splash prevention cover 1. Then, it is considered that the freezing prevention effect can be enhanced by releasing the heat stored during the day at the time of watering.

[0042] In the embodiment of the present invention, the water splash prevention cover 1 is formed of a titanium material. However, for example, in addition to the above-mentioned ceramic material, other metal materials such as stainless steel materials, resin materials, wood materials, etc. may be used.

[0043] In the embodiment of the present invention, the entire water splash prevention cover 1 is formed of a titanium material. However, the present invention is not limited to this, and only the inclined surface portion 4 may be formed of a titanium material, or only the drain guide member 2 may be formed of a titanium material.

[0044] In the embodiment of the present invention, the inclined surface portion 4 has a wide cross-sectional substantially U-shaped formed by three flat surfaces. However, the present invention is not limited to this, and for example, a curved shape such as a semicircular cross-section may be used.

[0045] In addition, in the embodiment of the present invention, the cover plate 3 has a substantially U-shaped configuration in plan view, but is not limited thereto. For example, it may have a curved configuration such as a semi-circular shape in plan view.

[0046] Note that the drainage guide member 2 according to the embodiment of the present invention is not only used for draining the water sprayed in the sprinkler device 10 for melting snow on the line, but is also applicable to other devices and the like. For example, it is applicable to a structure for draining the water adhering to roofing materials (houses, parking lots, bus stops, etc.) in cold regions, covers for road signs, drain gutters for bridges, utility poles, fences, and water drainage for bridges.

Industrial Applicability

[0047] The present invention is suitable for, for example, a drainage guide member that guides and drains the water sprayed by a sprinkler device to a desired area without freezing during a period when the temperature is low.

Explanation of Reference Numerals

[0048] 1 Splash water prevention cover 2 Drainage guide member 3 Cover plate 4 Inclined surface portion 5 Vertical surface portion 8 First plate 9 Second plate 10 Sprinkler device 11 Injection nozzle S1 Water injection space

Claims

1. A water splash prevention cover provided with a drainage guide member for guiding and draining adhering water without freezing it, wherein the drainage guide member, has an inclined surface portion for receiving the water, and a vertical surface portion provided continuously at the lower edge of the inclined surface portion and extending vertically downward, and is characterized by comprising a cover plate that surrounds a water injection space provided above the inclined surface portion and in which an injection nozzle of a sprinkler device that sprays water while rotating around a rotation axis extending vertically is disposed.

2. The water splash prevention cover according to claim 1, wherein at least one of the inclined surface portion and the vertical surface portion is made of a titanium material.

3. In the water splash prevention cover according to claim 1 or 2, the cover plate comprises a first plate extending vertically upward from the upper edge of the inclined surface portion, and a pair of second plates extending upward from each side edge of the inclined surface portion and continuous with each side edge of the first plate.

Images