JPS5822835A - Louver for attachment to air inlet port of building for atomic power equipment - Google Patents

Abstract

PURPOSE:To prevent splashes of rain drops running against louver blades from entering the title building by a method wherein the lower edge of each other ouver blades which are arranged in large numbers in spaced apart relationship in the vertical direction is bent upward so that a water receiving groove is provided at that lower edge. CONSTITUTION:The louver 3 is attached to the air inlet port 2 which is provided in a turbine house 1 of an atomic power plant for the purpose of facilitating the installation of a ventilating and air conditioning system. The louver 3 is constructed such that a number of louver blades 8 turned sidewyas are attached to the inner wall of a rectangular frame member comprising an upper crosspiece 5, a lower crosspiece 6 and right and left crosspieces, in spaced apart relationships with one another in the vertical direction. Further, each of the louver blades 8 is curved at a gradually increasing angle of inclination as it extends downward with its outer side edge positioned downward and the outer side edge, that is, the lower edge of the blade is bent upright so that the water receving groove 15 opening upward is provided at the lower end of the blade.

Description

[Detailed Description of the Invention] This invention relates to an O looper device installed at the air conditioning inlet of a building O of the Hiro Nuclear Power Plant to prevent rainwater O from entering.

In -4, ventilation and air conditioning equipment was installed at the nuclear power plant's nuclear power station and turbine. 2! A stone was placed in front of the Confucian painting at the entrance to the tower, and a looper device was installed at the entrance to the air chamber to prevent rainwater from entering. And this looper 5ttt! Generally, the air conditioner OIX★ had a double-shaped loop Δ vane as shown in the picture, but the amount of intrusion of rainwater O was as high as 0 in the past, and this round air conditioner OIX★ was very hot. In particular, nuclear power plants are generally located on the coast0
The rainwater contains salt, causing even more corrosion.

After investigating nine routes for this rainwater to enter, we found that
In the path of , raindrops B are m2 and small diameter droplets C...6 are generated on the loop Δ vane m...6, and these intrude along with the air flow. 9. The rainwater that fell on the lower edge of the 20th route was infiltrated by the air flow as it fell. In order to prevent rainwater from entering like ζO, it is possible to increase the angle of the Ru Δ blade Mu 0 with respect to the horizontal direction), increase the width of the Ru Δ blade A・-0), but If you do this, Rou A
(I equipment O pressure loss is large), it is a must! In order to obtain a sufficient air flow rate, the area between the openings must be increased, but in nuclear power facilities, the area of the openings can be increased due to the need to shield radiation oil and prevent the dispersion of radioactive materials. It has to be made smaller. Therefore, it is desired to develop a looper device that allows a small amount of rainwater to enter and has a small pressure loss.

The present invention can be made based on the above circumstances.
1 Fishing, Sui and Zero have less rainwater intrusion, and there is a lot of air *
;The pressure loss of 1hoya is small, so you can get 4 meters of pressure.

The present invention will be explained below with reference to an embodiment shown in FIG. 1 in the figure is the turbine building of the nuclear power plant, and the ventilation/air conditioning system O air intake: ttIA Kishii 1
It is. And ζO air intake lojd turbine matiho 1
It is open on the side. A looper device 1 is attached to the FO air intake port 2. The frame of the bureau is formed by the upper crosspiece 1-1, the lower crosspiece 6... and the left and right vertical crosspieces 1-, and a large number of louver wings ag- are placed on the O-frame. It is number 4 with 1# added in the horizontal direction. and,
These looper plates 8- are a must! ! A plurality of plates are arranged according to the conditions, and cover the air intake port 2. In addition, a filter # is provided in this air intake port 2, and is configured to remove dust that cannot be removed by the dust placed on the looper. - The upper crosspiece 5 and the lower 1!Jg are formed with one bolt fitting groove 10, 10, 11P Ruto 11...
The head is slidably and non-rotatably mounted. These installations are based on the turbine structure! Installed in the center from the 1st side and penetrated through the 9th mounting @xx and zz to the nut 13...
The O-looper plate f is fixed by tightening it.

In front of this LuΔboard difference IDIA@FC, a lattice-shaped bird screen 14 is attached to prevent birds from entering. And the above-mentioned upper rail 5. A large number of looper blades are attached in the horizontal direction to a frame body consisting of a lower crosspiece 6 and vertical crosspieces 1, 1. These looper blades 8.--external@green are located at a lower angle and are inclined by 1. The outer edges of these looper blades a-O and the lower edges are curved in a convex manner upwards, and the lower edge of the looper blades 8... has an inclination that increases as it goes downward. It is configured so that The lower lIK of these two wings 111- is formed with a water receiving groove II... in which the upper II is open.
9. These rood blades a-O are folded into the vertical wall of the upper edge Fi, and this upper edge KVi is folded into the horizontal wall! l! The Mizukiri Ojo IC, which was released, has been renovated. And the vertical bar 1
．． A drainage ditch 11 is formed that is continuous with the IK vertical gangway. Both end portions of the water receiving groove 15- of the two-wing machine I- protrude to the sides of the two-wing machine A), and this protruding portion line is inserted into the drainage groove 11 of the vertical bar r above. . t'E, a flow guide piece 18- is punched in the center downward from the original picture at both end portions of these water receiving grooves 15. Further, the upper part of the lower crosspiece 60 is formed to be smooth and is inclined so that the outer side faces downward. Also, this lower crosspiece 60PiI
A blocking part 19 is provided in the center extending from the edge upwards,
ζO closing Ill J # K closes the threshold between the lower crosspiece I and the lowest 1Δ blade 8. Then, from the outer weave of the upper crosspiece 10, there is a water receiver 1 [20 is rubbed by Sa], and there is a water receiver in the lower hoe part of the water receiver plate 200, similar to the J&-zt feathers. A groove 1J is formed.

Next, the operation of the above embodiment will be explained. When it rains and there is a wind O, the raindrops fall diagonally as shown in Figure 6, and a thunderstorm and small-diameter droplets C are generated at the lower edges of the looper blades 8. Since the lower edge of the looper blade 8- is curved so as to be convex upward, the slope of this lower edge increases as it goes downward. Shiku gaute ζ
The raindrops B falling on the lower edge of O are from the normal line of the roaring part, p from the upper part of O! ! & it becomes like that. Therefore, the droplets C-0 are scattered to the outer wall of the company, and the amount of these droplets C-0 entering is greatly reduced. Further, the rain falling on the upper surface Fc of these looper blades 8... flows down the upper surface of ζO, is collected in the water receiver @ 115, and is also drained from the vertical bar 7° 10 drain groove 17. Yo-
9, water droplets do not drip from the lower edges of these looper blades 8-, and water droplets from the looper blades IIO do not enter the air intake port 2 due to air flow. In addition, actually the water receiving groove 11i is located outside of the water receiving groove 11i.
t) Since it may drip from the bottom surface, ζO water receiving groove 15
C) It is better to widen and lower the depth 11H, but if this is done, rainwater may overflow from the ζO water receiver @XS when there is a lot of rainfall, so this depth of H company Sm@Ill is preferable. In addition, when the speed of the air flowing between the expanding looper blades 8 and 8 is high, water droplets attached to the upper surface of the expanding looper blades 1- may be moved upward by the air flow. However, since water cutouts @Ig- are formed on the upper lines of these louver blades l11-, this water droplet E stops at these water cutout ridges 1#- and does not enter the air intake port 2. In addition, in the past, water droplets accumulated on the upper surface of the lower crosspiece O were pushed by the air flow and scattered from the protrusion on the upper surface of the ζO lower crosspiece and entered.
Since the space between the looper blade 8 and the lowermost looper blade 8 is closed, there is no water intrusion as described above. In addition, the rainwater flowing through the upper middle crosspiece 5 of the tarrylk 1 is connected to the water receiving plate 200 and the water receiving groove 1rr.
Since K is collected, there is no possibility of water droplets dripping from the upper crosspiece 1, and such water droplets will not enter due to air flow. 9. Both ends of the water receiving groove IJ- protrude outward and expand into the drain grooves 11 in length and width, ensuring that rainwater is guided into the drain grooves 17. Otahirera water receiving groove 1
1-10 Since the flow guide pieces 11- are assembled at both ends Omaroma, rainwater flows down through the flow guide pieces 11-, goes around the bottom of the water receiving groove 15-, and drips. There is no such thing.

Next, in order to confirm the O effect of the present invention, the results of the Ohinari Kui experiment will be shown. Figure 7 shows the infiltration rate of rainwater for the looper device shown in Figure 1, which has a conventional O-roux Δ blade. The penetration rate is high, 7 to 8 at j9.30'.
Figure 8 shows the relationship between the angle of the looper blades and the aperture ratio of a nine-roupe Δ device having a two-roux machine according to an embodiment of the present invention. . Furthermore, this shows that a relatively large effective aperture ratio can be obtained when the angle of the looper blade is in the leakage range. Further, FIG. 9 shows the results of a comparison of the rainwater infiltration rate between a conventional looper device having looper blades shaped as shown in FIG. 1 and a looper device according to the present invention. In addition, the looper device used in the ζ0@ experiment has a depth of 100 m + a loop Δ blade IIO angle - fi 3.00, and the one of the present invention has a curvature of half # of the lower edge of the looper blade and the curvature of its own part! k is so. The middle curve IsK in Fig. 9 is the conventional one, and the one made by IA Ming, the width of the water receiving groove is 15 gm, 11 x 15-.
Also, curve M has a water receiver wO width of 1! S cod, deep-fi5■. As is clear from these results, the intrusion rate of rainwater is significantly reduced in the case of the present invention compared to the conventional one), and even in the case of the case of the present invention, the rainwater intrusion rate is lower when the depth of the water receiving groove is smaller. shows a low %Aξ. It should be noted that the present invention is not limited to the above-mentioned 〇-Examples.

For example, the structures of the frame, the drain groove, and the water receiving groove at both ends are not necessarily limited to those of the above embodiments.

The present invention is applicable not only to the louver device for the air intake of a nuclear power plant such as a nuclear reactor, but also to the louver device for the air intake of a nuclear power plant such as a nuclear reactor.

As described above, in the present invention, the lower edge of the looper blade is curved upwardly so as to be convex, and the lower edge is provided with a water receiving groove. As a result, the raindrops that fall on the lower edges of the looper blades are scattered outward, and are collected in the rainwater receiving grooves that flow down the dirt floor of these looper blades and drip down. Therefore, the intrusion of splashes and water droplets is extremely reduced. Therefore, this product can reduce the amount of rainwater that enters without having to increase the width of the sealer blades by increasing the angle of the looper blades, and the area of the air intake port can be reduced because the pressure loss is small. is large.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional looper blade. Figures 2 to 6 show one embodiment of the present invention, with Figure 2 being a longitudinal sectional view, Figure 3 being a view taken along arrow I-1 in Figure 2, and Figure 4 being a partially enlarged view. 5 is an exploded perspective view, and FIG. 6 is a sectional view of the looper blade for explaining the operation. 7th
The figure is a diagram showing the relationship between the rainwater infiltration rate and the blade angle of a conventional looper device, Figure 8 is a diagram showing the relationship between the blade angle and effective aperture ratio of one embodiment, and Figure 9 is a diagram showing the relationship between the blade angle and the effective aperture ratio of one embodiment. It is a diagram showing the relationship between the wind speed passing through the outer looper and the rainwater intrusion rate. 1- Turbine building (nuclear equipment building), l... Louver device, 8... Looper blade, 15... Water receiving groove, 11
...Drainage ditch. Applicant's representative Patent attorney Suzu Ebuhiko Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 6 Figure 7 Figure 9 Continued from page 1 ■Applicant Shin Nippon Air Conditioning Co., Ltd. Nihonbashi, Chuo-ku, Tokyo Mitsui 2nd Annex, 4-2, Motokicho ■Applicant: Japan Aluminum Construction Materials Co., Ltd. 1-9-3 Uchikanda, Chiyoda-ku, Tokyo

Claims (1)

[Claims] qI that the lower edge lII is curved so as to convex upward, has a water catchment on the lower edge, and is equipped with a plurality of looper blades.
#Shin and Sui Nuclear building air intake looper device.