JP3653594B2 - Fire fighting head - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a fire extinguishing head for use in large exhibition halls, atriums, gymnasiums, and the like. More specifically, the present invention relates to a wide rectangular fire extinguishing area, for example, a fire extinguishing area having a width of 5 m and a length of 20 m. It relates to a fire extinguishing head that can be used.
[0002]
2. Description of the Related Art Conventionally, a fire extinguishing head in which a plurality of nozzles having different range distances are vertically arranged is used in order to spray water evenly over a wide rectangular fire extinguishing area. In order from the top, the nozzle of this fire-extinguishing head is provided with a long-throw nozzle, a middle-throw nozzle with a shorter range than the long-throw nozzle, and a near-throw nozzle with a shorter range than the middle-throw nozzle. It has been.
[0003]
[Problems to be solved by the invention]
The conventional fire extinguishing head has the following problems.
(1) The water discharge flow ejected from the near throw nozzle draws air, the water discharge flow ejected from the middle throw nozzle draws air, and the water discharge flow ejected from the middle throw nozzle also draws air, for long throwing It draws the water discharge jetted from the nozzle. Therefore, since the range of each nozzle is shorter than the design, water cannot be uniformly distributed over a wide rectangular watering area of 20 m class.
[0004]
(2) Since the water spray area is determined to be a long-distance point for long-throw nozzles and an intermediate point for middle-throw nozzles, the particle size varies depending on the location.
(3) Since the water spraying points of each nozzle are fixed, it is difficult to spray water uniformly with clean rectangular water discharge.
[0005]
In view of the above circumstances, an object of the present invention is to enable uniform watering in a large rectangular watering region.
[0006]
[Means for Solving the Problems]
The present invention relates to a fire-extinguishing head comprising an inner nozzle and an outer nozzle fitted to the inner nozzle, the nozzle having a water supply hole of the inner nozzle communicated with a discharge port of the outer nozzle. And a deflector having an upper notch and a lower notch formed at the periphery and fitted to the inner nozzle, and the deflector is provided between the inner nozzle and the outer nozzle. The above object is achieved by a fire extinguishing head characterized in that it is interposed between them.
[0007]
[Action]
The water discharge flow from the nozzle of the fire extinguishing head is sprinkled over the entire area of the nozzle by the upper water discharge area, the side water discharge area, and the lower water discharge area.
[0008]
In particular, by providing the lower water discharge area, water can be sprayed to the rear end side of the fire extinguishing head.
[0009]
Further, due to the interaction between the long throwing nozzle and the middle throwing nozzle, the particle diameter is substantially the same from the middle to the far distance.
[0010]
【Example】
Embodiments of the present invention will be described with reference to the accompanying drawings. The fire-extinguishing head 1 is provided with a middle throwing nozzle 100, a far throwing nozzle 200 on the upper side, and a near throwing nozzle 300 on the lower side. The middle throwing nozzles 100 are arranged in parallel on both sides of the long throwing nozzle 200.
[0011]
The central axis 100c of the middle throwing nozzle 100 and the central axis 200c of the long throwing nozzle 200 are located on the same horizontal line, and the central axis 200c of the long throwing nozzle is the central axis of the fire fighting head 1 The angle θ1 is inclined with respect to 1c. The angle θ1 is appropriately selected in consideration of the water spray area, and for example, the angle θ1 = 26 ° is selected.
[0012]
The center axis 300C of the near throwing nozzle 300 is inclined at an angle θ2 with respect to the central axis 1c of the fire-extinguishing head 1. The angle θ2 is appropriately selected in consideration of the water spray region, and for example, the angle θ2 = 30 ° is selected.
[0013]
The middle throwing nozzle 100 is a fan-shaped nozzle having a shorter range than the long throwing nozzle 200 and a longer range than the near throwing nozzle 300. When one nozzle 100 is used alone, the range L is about 8.5 to about 16 m, and the watering width W is about 2 to 3 m, thereby forming the watering basin S1 shown in FIG. 21A.
[0014]
A pair of the middle throwing nozzles 100 are provided on the same horizontal line F1 with the long throwing nozzle 200 interposed therebetween. The intersecting angle θ3 of the central axes 100c of the two nozzles 100 is selected as appropriate, for example, the intersecting angle θ3 = 14 °. The diameter of the nozzle 100 increases toward the outlet 101, and the outlet 101 is formed in a rectangular shape (see FIGS. 5 to 7).
[0015]
The long throwing nozzle 200 has a longer range than the middle throwing nozzle 100 and the near throwing nozzle 300, and is therefore a jet nozzle having the longest range in each nozzle.
When the nozzle 200 is used alone, the range L is about 7 to about 22 m, and the watering width W is about 2 to about 5 m, forming the watering region S2 shown in FIG. 21B.
[0016]
This long throw nozzle 200 is provided with a plurality of water discharge holes 201 arranged at intervals on the same horizontal line F2. The water discharge hole 201 is disposed between the middle diameter hole 202 at the center, the large diameter holes 203 disposed on both sides of the medium diameter hole 202, and the middle diameter hole 202 and the large diameter hole 203. And a small-diameter hole 204. The central axis 200c of the medium diameter hole 202 intersects the central axis 1c of the fire extinguishing head (see FIGS. 8 to 10).
[0017]
The diameters of the holes 202 to 204 are different from each other for the following reason. (1) Since the water flow from the nozzle is more susceptible to air resistance as it goes to the outside, the outer nozzle must have a large flow rate so as not to be affected.
[0018]
(2) If the water flow in the middle is set to a large flow rate, the water will be sprinkled in the middle. In order to prevent this uneven watering, the middle nozzle must discharge a medium flow rate.
(3) The nozzle between the middle nozzle and the nozzles on both sides must be allowed to follow the water spray on the middle and both ends in order to spray evenly.
[0019]
In consideration of the above circumstances, the diameter of each of the holes 202 to 204 is formed so that, for example, the large diameter hole 203 to the small diameter hole 204 to the medium diameter hole 202 has a ratio of 7: 4: 5. Of course, this ratio can be changed as needed.
[0020]
The long throw nozzle 200 serves to compensate for a lack of a water spray area in the water discharge flow ejected from the middle throw nozzle 100.
[0021]
The near throwing nozzle 300 has a shorter range distance than the middle throwing nozzle 100 and the far throwing nozzle 200, and therefore has the shortest range in each nozzle. When the near throwing nozzle 300 is used alone, the range L is about 1 m from the rear to about 6 m in the front, and the watering width W is about 4 to 5 m, thereby forming the watering region S3 shown in FIG. 21C.
[0022]
The near throwing nozzle 300 includes an inner nozzle 301, an outer nozzle 310 fitted to the inner nozzle 301, and a deflector 320 interposed between the inner nozzle 301 and the outer nozzle 310. (See FIGS. 11 to 20).
[0023]
An orifice housing 302 is provided at the rear end of the inner nozzle 301, and a plurality of water supply holes 303 communicating with the discharge port 311 of the outer nozzle 310 are provided in the body 309 (FIG. 13). FIG. 14).
[0024]
A throttle portion 305 is provided at the tip of the inner nozzle 301. The angle θ5 of the aperture 305 is appropriately determined as necessary, and for example, the angle θ5 = 90 °. Reference numeral 308 denotes an engaging step portion such as a tool.
[0025]
The water outlets 306 of the inner nozzle 301 are formed in a radial shape, and the radiation angle θ6 is appropriately determined as necessary. For example, the radiation angle θ7 = 120 °. A spiral storage portion 307 is formed between the throttle portion 305 and the water supply hole 303.
[0026]
A guide ring 312 and a resistance ring 313 are formed concentrically on the upper end surface of the outer nozzle 310. An annular channel 315 is provided between the rings 312 and 313. The inner surface of the guide ring 312 is inclined outward. The inclination angle θ8 is appropriately determined as necessary. For example, the inclination angle θ8 = 45 ° (FIGS. 15 and 16).
[0027]
The front half of the guide ring 312 is provided with a notch 314, and water sprayed from the notch 314 constitutes a lower water discharge area E3. The water discharge angle E3 of this water discharge area is appropriately determined as necessary, and for example, the angle E3 = 125 °.
[0028]
The resistance ring 313 includes a plurality of fan-shaped protrusions 316 arranged at intervals in the circumferential direction. The protrusion corresponding to the lower water discharge area E3 is lacking, and the part corresponding to the side water discharge area E2 is provided with a plurality of side protrusions 317 with a gap L6. A central protrusion 318 is provided at the center of the portion corresponding to the water area E1.
[0029]
The central projection piece 318 is formed larger than the side projection piece 317, and the interval L7 between the central projection piece 318 and the side projection piece 317 is formed wider than the interval L6. The water discharge area angles E2 and E1 of the side water discharge area E2 and the upper water discharge area E1 are appropriately selected as necessary. For example, the water discharge area angle E2 = 45 ° and the water discharge area angle E1 = 90 °. Reference numeral 319 denotes a passage into which the inner nozzle 301 is inserted.
[0030]
A fitting port 321 of the inner nozzle 301 is formed at the center of the deflector 320, and notches 322 and 323 are formed at the peripheral edge thereof. The notch 322 is a lower notch and constitutes a U-shaped groove having a width L10 substantially the same as the width L11 of the dispersion piece 325. A plurality of the notches 322 are formed at equal intervals over the entire range corresponding to the lower water discharge area E3. The shape and number of the notches 322 are appropriately selected as necessary (see FIG. 17).
[0031]
The notch 323 is an upper notch and is formed in a portion corresponding to the upper water discharge area E1. The notch angle L13 of the upper notch 323 is determined as necessary. For example, the notch angle L13 = 60 °.
[0032]
A portion 326 corresponding to the side water discharge area E2 of the peripheral portion of the deflector 320 is not provided with a notch.
[0033]
The inner nozzle 301 is provided with a spiral 330 and an orifice 340. The spiral 330 is provided with a groove 331 formed in a spiral shape on the side wall thereof, and the water for fire extinguishing is stirred to form a swirling flow. In addition, 332 is a water flow hole (refer FIG. 18).
[0034]
The orifice 340 is formed in the ring 341, and the inner surface 343 on the outlet 342 side is formed in a truncated cone shape having a cone angle α. The cone angle α is appropriately selected as necessary. For example, the cone angle α = 90 °. The orifice 340 reduces the pressure of the water discharge flow and increases the water discharge particle size. Reference numeral 345 denotes an inlet (see FIGS. 19 and 20).
[0035]
Next, the operation of this embodiment will be described. As shown in FIG. 1, the fire-extinguishing head 1 is attached to a side wall 500 of a large space such as an international exhibition hall. At this time, the central axis 1c of the fire-extinguishing head 1 is horizontal, and the middle throwing nozzle 100 and the long throwing nozzle 200 are upward, for example, the inclination angle θ1 = 26 ° upward with respect to the central axis 1c. Further, the near throwing nozzle 300 is directed downward, for example, inclined angle θ2 = 30 ° downward with respect to the central axis 1c.
[0036]
When a main valve of a fire extinguishing equipment (not shown) is opened and fire extinguishing water 600 having a predetermined pressure, for example, 3.5 kgf / cm ² is pumped to the fire extinguishing head 1, the fire extinguishing water 600 is supplied to each nozzle 100 as shown in FIG. , 200, 300.
[0037]
The water discharge flow 610 from the middle throwing nozzle 100 falls in a parabolic shape while spreading in a fan shape, but collides with the rod-shaped water discharge flow 620 from the long throwing nozzle 200 in the middle. Therefore, the energy of the rod-like water discharge flow 620 is lost to the water discharge flow 610, and the water discharge flow 610 extends the range L while riding on the water discharge flow 620, and the water spray region S 5 of the middle throwing nozzle 100. Since the sprinkling flow 620 is also sprinkled on the center line SC, the sprinkling region S5 of the middle throwing nozzle 610 has the shape shown in FIG.
[0038]
The rod-like water discharge flow 620 deprived of energy by the water discharge flow 610 has a shorter range L than the case where it is used alone, and becomes a water spray region S6 shown in FIG. 23, but the range L is 20 m or more. It reaches.
[0039]
As described above, the range L of the rod-like water discharge flow 620 is shortened by the collision of the water discharge flow 610 and the water discharge flow 620, but on the other hand, the water discharge flows 610 and 620 of each other serve as a deflector. Therefore, it is possible to spray water uniformly and widely.
[0040]
The long throw nozzle 200 has a large-diameter hole 203, a small-diameter hole 204, and a medium-diameter hole 202 having different diameters arranged at intervals in the horizontal direction, so that it can be sprayed with a certain spread and discharged from each hole. The discharged water does not converge in the middle.
[0041]
Since the large-diameter holes 203 having the largest diameter are arranged on both sides, the water discharge flow from the large-diameter hole 203 having the longest range L interferes with the short-range discharge water discharged from the other holes 202 and 204. However, the range L of these water discharge streams is longer than when they are released alone. Thereby, it is more reliably performed to spread with a certain spread.
[0042]
Since the medium diameter hole 202 is provided in the center, the large diameter holes 203 are provided on both sides thereof, and the small diameter hole 204 is provided between the two holes 202, 203, the water discharge from the medium diameter hole 202 is directed to the other holes 203, It is less likely to receive interference from the water discharge flow from 204. Further, if the water spray region is formed only by the water discharge flow from the large diameter hole 203 and the medium diameter hole 202, the water spray distribution becomes coarse and dense, but this inconvenience can be solved by the water discharge flow of the small diameter hole 204.
[0043]
The water discharge flow 630 discharged from each water discharge area E1, E2, E3 of the near throwing nozzle 300 falls while drawing a parabola, and is sprayed on the water discharge area S7 in the vicinity of the fire-extinguishing head 1. The near throwing nozzle 300 is provided with an orifice 340, and the fire extinguishing water 600 supplied to the fire extinguishing head 1 and supplied to the near throwing nozzle 300 is supplied to the near throwing nozzle 300 by a predetermined pressure, for example, Since the pressure is reduced to 2.5 kg / cm ² , the flow rate becomes slow.
[0044]
Therefore, the water discharge flow 630 from the near throwing nozzle 300 does not affect the discharge water 610 and 620 discharged from the long throwing nozzle 200 and the middle throwing nozzle 100, and the water spray particle size becomes large and the fire is extinguished. Can be effective.
[0045]
The fire-extinguishing water 600 that has passed through the orifice 340 is swirled by the spiral 330 while being squeezed by the constricting portion 305 and then discharged as a water discharge flow 630 from the inner nozzle 301.
[0046]
Part of the fire-extinguishing water 600 that has passed through the orifice 340 passes through the water supply hole 303 and the passage 350, and is subject to the restrictions of the deflector 320, the projecting pieces 316, 317, and 318, and the guide ring 312. The water discharge flow 630 is discharged from the outer nozzle 310 and is sprayed from the outer nozzle 310 over the entire upper discharge area E1, the lateral discharge area E2, and the lower discharge area E3.
This upper watering area E1 is mainly responsible for the watering of the central part 300C of the water discharge area S7, and the side watering area E2 mainly receives the watering of the side 300B of the water discharging area S7, and further the lower watering area E3 is mainly responsible for watering on the rear end 300A side of the water discharge area S7.
[0047]
In this way, the water discharge flow 610, 620, 630 from each nozzle 100, 200, 300 forms a large rectangular sprinkling region S as a whole, its length L exceeds 20 m, and its width W is also 5 m. Exceed. Therefore, this fire-extinguishing head 1 can efficiently extinguish a building having a large space such as an atrium.
Since it comprised as mentioned above, there exist the following remarkable effects.
(1) Since the middle throw nozzles are arranged in parallel on both sides of the long throw nozzle, the water discharge flow from the middle throw nozzle collides with the water discharge flow from the long throw nozzle in the course of its travel, Take away. For this reason, the water discharge flow from the middle throw nozzle increases the range while riding on the water discharge flow from the long throw nozzle, and the water discharge flows as a deflector due to the collision. can do.
[0049]
(2) Since the middle throw nozzles are provided in parallel on both sides of the long throw nozzle and the near throw nozzle is provided below the long throw nozzle, the water discharge from the middle throw nozzle It collides with the water discharge flow of the long throw nozzle and extends the range while riding the water discharge flow. Further, the water discharge from the near throwing nozzle is sprinkled in the area near the nozzle. For this reason, since a uniform water spray distribution can be performed in a large rectangular fire extinguishing place as a whole, it is possible to efficiently extinguish a large space.
[0050]
(3) Since the mid-throw nozzle is a pair of fan-shaped nozzles, the spray area can be widened.
[0051]
(4) Since the long-throw nozzle is a jet nozzle, the water discharge flow is rod-shaped and is less susceptible to the wake from the wind of the water discharge flow of the near-throw nozzle. Therefore, the range of the long throw nozzle is less affected by the near throw nozzle.
[0052]
(5) Since the near-throw nozzle is provided with an orifice, the water pressure of fire-extinguishing water can be reduced to increase the water spray particle size. Therefore, watering with good fire extinguishing efficiency can be performed.
[0053]
【The invention's effect】
By configuring the present invention as described above (for example, the near throwing nozzle in the above embodiment), the fire-extinguishing head has the following remarkable effects.
The water discharge flow from the nozzle of the fire extinguishing head is sprayed over the entire area near the nozzle by the upper water discharge area, the side water discharge area, and the lower water discharge area. In particular, by providing a lower water discharge area, water can be sprayed to the rear end side of the fire extinguishing head.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention, and shows a mounted state.
FIG. 2 is a front view showing a fire-extinguishing head before mounting.
FIG. 3 is a side view of FIG. 2;
4 is a partial cross-sectional plan view of FIG. 2;
FIG. 5 is a front view of a middle throwing nozzle.
6 is a cross-sectional view taken along line VI-VI in FIG.
7 is a cross-sectional view taken along line VII-VII in FIG.
FIG. 8 is a side view of a long throw nozzle.
FIG. 9 is a plan view of a long throw nozzle.
FIG. 10 is a front view of a long throw nozzle.
FIG. 11 is a front view of a near throwing nozzle.
12 is a cross-sectional view taken along line XII-XII in FIG.
FIG. 13 is a front view of an inner nozzle of a near throwing nozzle.
14 is a cross-sectional view taken along line IVX-IVX in FIG.
FIG. 15 is a front view of an outer nozzle of a near throwing nozzle.
16 is a cross-sectional view taken along line XVI-XVI in FIG.
FIG. 17 is a plan view of a deflector of a proximity nozzle.
FIG. 18 is a plan view of a spiral of a near throwing nozzle.
FIG. 19 is a plan view of an orifice of a near throwing nozzle.
20 is a cross-sectional view taken along line XX-XX in FIG.
FIG. 21 is a diagram showing a watering area when each nozzle is used alone, where A is that of a middle throwing nozzle, B is that of a long throwing nozzle, and C is that of a near throwing nozzle.
FIG. 22 is a view showing a state of a water discharge flow of each nozzle.
FIG. 23 is a diagram showing a rectangular watering region formed by a water discharge flow of each nozzle.
[Explanation of symbols]
1 Fire-extinguishing head 100 Middle-throw nozzle 200 Long-throw nozzle 300 Near-throw nozzle

Claims (4)

In a fire extinguishing head having an inner nozzle and an outer nozzle fitted to the inner nozzle, the nozzle having a water supply hole of the inner nozzle communicated with a discharge port of the outer nozzle,
A fitting port of the inner nozzle is formed in the center, and a deflector in which an upper notch and a lower notch are formed on the peripheral edge is provided by fitting the inner nozzle,
A fire-extinguishing head, wherein the deflector is interposed between the inner nozzle and the outer nozzle. A water supply hole of the inner nozzle, comprising an inner nozzle, an outer nozzle fitted to the inner nozzle, a deflector formed with a fitting port of the inner nozzle and interposed between the inner nozzle and the outer nozzle A fire extinguishing head having a nozzle communicating with the discharge port of the outer nozzle, the outer nozzle being concentrically inside the guide ring, and a guide ring in which a lower water discharge area is cut off at a tip surface thereof A resistance ring provided, wherein the resistance ring has a lower water discharge area cut out, a plurality of gaps are formed in the upper water discharge area, and a plurality of gaps narrower than the gap are formed in the side water discharge area. Fire extinguishing head characterized by The outer nozzle includes a guide ring in which a lower water discharge area is cut off at a tip end surface thereof, and a resistance ring that is provided concentrically on the inner side of the guide ring and includes a plurality of protruding pieces. The fire-extinguishing head according to claim 1. The outer nozzle includes a guide ring in which a lower water discharge area is cut out at a front end surface thereof, and a lower notch is formed in a lower peripheral edge of the deflector corresponding to the lower water discharge area. The fire-extinguishing head according to claim 1.

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