JPH09299503A - Water sprinkling method for fixed fire-fighting facility and sprinkler nozzle for fire extinguishment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fire-fighting ability for a sprinkler nozzle for fire extinguishment, to reduce water flooding damage by reducing radiation quantity and to reduce cost by reducing the volume of a pump, etc. SOLUTION: A sprinkler nozzle 1 for fire extinguishment is connected to piping for fire extinguishment for supplying fire-fighting liquid or fire-fighting water with pressure and in the case of sprinkling the fire-fighting liquid or fire-fighting water at the time of fire, a nozzle part 4 forms a sprinkle pattern for sprinkling water while centralizing water to any specified part within a prescribed protect range. Then, the nozzle part 4 is rotationally driven with a water current in the case of sprinkling the fire-fighting liquid or firefighting water as a driving source. At such a time, the rotation of the nozzle part 4 is decelerated by friction resistance, the sprinkle pattern is scanned and water is sprinkled over all the areas inside the protect range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water spraying method and a water spray nozzle for a fixed fire extinguisher used in a fixed fire extinguishing equipment such as a sprinkler fire extinguishing equipment.

[0002]

2. Description of the Related Art Conventionally, as a fire extinguisher sprinkler nozzle used in this type of sprinkler fire extinguishing equipment, in order to uniformly sprinkle water over the entire protection area, water is dispersed by a deflector and sprinkled in a granular state. There is one as shown in FIG. FIG. 17 shows a fusible link type water spray nozzle for extinguishing a fire, in which a nozzle body 101 is provided with a water outlet 102, and a plug 103 and a deflector 10 provided at the water outlet 102 are provided.
4 and a pair of levers 105a, 105b between the contact point 1
06a, 106b, 106c, and the stopper 103
Are supported in a closed state. Lever 105a and lever 1
05b has a pair of links 108 fixed by a fuse 107 as a heat sensitive body, and maintains the closed state of the plug 103.

When the temperature rises due to fire, the fuse 10
When 7 melts, the pair of links 108 is disassembled as shown by the arrows, and the locking of the levers 105a and 105b is released,
The water pressure causes the levers 105a and 105b to pop, and the plug 103 falls off from the water outlet 102, so that pressurized water is discharged from the water outlet 102.
It spouts from and watering starts. At this time the water outlet 102
The water jetted from hits the detractor 104 and is evenly sprayed over the entire protection area.

[0004]

However, in such a conventional fire extinguisher sprinkler nozzle, since the continuous radiation of a predetermined flow rate of, for example, 80 liters / minute or more per nozzle, fire extinguishing ability is achieved. However, a relatively large amount of fire extinguishing liquid or water is required, and as a matter of course, it is emitted to objects other than the extinguishing target, so the secondary disaster caused by the emitted fire extinguishing liquid or water, so-called water damage, increases. There was a problem. Further, in terms of equipment, there is a problem that the water tank and the pump have a large capacity, the size of the pipe is large, and the cost of the entire equipment is high.

Further, in the conventional water spray nozzle, in order to spray water uniformly over the entire protection area, the water is dispersed by a deflector to be granulated and sprayed. Therefore, when the fire has a strong momentum, the dispersed water has a small particle size, so it evaporates before it reaches the deep part of the fire due to the flow of the fire, it takes time to suppress the fire, and it cannot be extinguished at all. Sometimes. As a result, the amount of water increases and the damage caused by water loss increases.

Further, from a certain point within the protection range,
Even if the flame of the fire at that point weakens for a moment due to the granular water, the water around the point evaporates once, and the water near the point begins to burn again. Therefore, it takes time to completely extinguish the fire. The present invention has been made in view of the above problems, and reduces the water loss by reducing the amount of radiation per one fire extinguisher sprinkling nozzle while ensuring the fire extinguishing ability. An object of the present invention is to provide a water spraying method for a fixed fire extinguishing facility and a water spray nozzle for extinguishing a fire, which can reduce the installation cost by reducing the capacity of a pump or the like.

[0007]

In order to achieve the above object, the present invention is configured as follows. First, the present invention is a sprinkling method of a fixed type fire extinguishing equipment for extinguishing by spraying a fire extinguisher liquid or water for extinguishing water from a nozzle portion of a fire extinguisher water spray nozzle connected to a fire extinguisher pipe at the time of a fire, and one fire extinguisher water spray nozzle Spray water for fire extinguishing from the nozzle part to a specific part within the specified protection range of the nozzle to spray the fire extinguisher liquid or water for extinguishing water intensively to form a specified spray pattern, and rotate the nozzle part with the water flow at the time of spraying as the drive source. Further, the rotation of the nozzle portion is decelerated by frictional resistance, the spray pattern is scanned within a predetermined protective range, and water is sprayed over the entire predetermined protective range.

Further, the present invention is a fire extinguisher sprinkling nozzle of a fixed type fire extinguishing equipment, which is connected to a fire extinguishing pipe to which fire extinguishing liquid or water for extinguishing water is pumped and sprinkles the fire extinguishing liquid or water for extinguishing water within a predetermined protection range. A swirling nozzle part that forms a spray pattern that concentrates water on a specific part of the nozzle, and the nozzle part is driven to rotate by using the water flow when spraying the fire extinguisher liquid or water for extinguishing water from the nozzle part as a drive source, and the spray pattern is specified. And a friction deceleration unit that decelerates the rotation of the nozzle unit by the driving unit by frictional resistance.

The drive unit is composed of a jet water flow rotating mechanism for ejecting a water flow from the nozzle unit and rotating it by a reaction force thereof, or a water wheel mechanism rotated by a water flow of the fire extinguishing liquid or the water for extinguishing water supplied to the nozzle unit. Also, the friction reducer is
The nozzle is composed of a pressing spring mechanism that applies a thrust force to the nozzle to generate frictional resistance, or a rotary damper gear-connected to the nozzle.

Further, the nozzle portion is provided with a heat-sensitive operation mechanism for supporting the water spout opening to the inside in a closed state in a steady monitoring state, and releasing the water spout after reaching a predetermined temperature due to a fire and separating. According to the fire extinguisher sprinkling nozzle of the present invention having such a configuration, a spraying pattern is formed so as to intensively spray a certain portion within the protection range, and scanning is performed within the protection range. On the other hand, since a larger amount of fire extinguishing liquid is instantaneously emitted from the conventional water spray nozzle, for example, a water spray nozzle that emits radiation over the entire protective range of 80 liters / minute and 40
Compared with the case of about 1 rpm in the ring scanning of liter / minute, a higher fire extinguishing ability can be obtained despite the small amount of water in the entire protection range.

Further, according to the present invention, since the sprinkling amount is instantaneously increased, the striking force and the particle size of the water hitting the extinguishing object are also increased, so that the extinguishing ability is increased. That is, in the present invention, the water is not dispersed particles but is sprayed on the fire extinguishing object as a mass of water with a strong striking force that is concentratedly sprayed on a specific part, so that the fire does not lose to the fire air flow. The fire-extinguishing ability is enhanced by reaching the deep part of the area, and the time to suppress the fire is short, and therefore the amount of water until the fire is extinguished is small. Moreover, since the fire is extinguished with water in a lump state, the once extinguished part will not be burned again, and the once extinguished place can be continuously extinguished.

Since the fire can be extinguished with a small amount of radiation, so-called water damage can be reduced. Further, the radiant water tank becomes smaller, the pump has a smaller capacity, the backup equipment such as the private power generation equipment also has a smaller capacity, and the pipe size also becomes smaller, resulting in lower cost. Even if the protection range is larger than that of the conventional water spray nozzle, by adjusting the scanning time, a large amount of water can be emitted instantaneously in the event of a fire, and fire extinguishing performance equivalent to or better than that of a fire can be achieved. Therefore, the number of nozzles to be installed can be reduced as compared with the conventional water spray nozzle.

[0013]

1 is an explanatory view showing a first embodiment of a fire extinguisher sprinkler nozzle of the present invention, and FIG. 2 is a sectional view of the present fire extinguisher sprinkler nozzle. In FIGS. 1 and 2, reference numeral 3 denotes an upper cover of the fire extinguisher water spray nozzle 1, a connection screw portion 3a is formed on the upper cover 3, and the connection screw portion 3a is a fire extinguishing liquid or water (hereinafter, simply referred to as fire extinguishing water). ) Is pumped and connected to a fire extinguishing pipe (not shown). Further, the upper cover 3 is formed with an inflow passage 20 into which the fire extinguishing water pressure-fed from the fire extinguishing pipe flows. A cylindrical portion 3b having a small diameter and protruding downward is integrally formed on the lower surface of the upper cover 3.
A sprinkling port 21 communicating with the inflow passage 20 is formed in the. A peripheral groove 3c is formed on the outer periphery of the lower surface of the upper cover 3,
The nozzle body 2 formed of a cylindrical portion is screwed and fixed to the circumferential groove 3c.

A bearing flange 7 is formed at the lower end of the nozzle body 2 so as to project inward, and an opening 7a is formed by the bearing flange 7. In the nozzle body 2, a nozzle portion 4 for spraying fire-extinguishing water in a concentrated manner in a slit-shaped spray pattern is rotatably housed in a specific portion within a predetermined protection range. A flange portion 4c and a protrusion portion 4d are formed on the upper side of the nozzle portion 4, and a ring groove 4e is formed by the flange portion 4c and the protrusion portion 4d. A plurality of balls 6 are housed in the ring groove 4e. These balls 6 allow the nozzle portion 4 to rotate smoothly.

Reference numeral 18 denotes a mounting shaft fixed to the central portion of the nozzle portion 4. One end of the mounting shaft 18 is screwed and fixed to a fixing portion 4b formed in the central portion inside the bottom portion of the nozzle portion 4,
A valve 1 having a valve body 19a and a packing 19b at the other end
9 are provided. At the time of normal monitoring, the valve 19 closes the water spray port 21 of the upper cover 3, and when the nozzle portion 4 descends due to the occurrence of a fire, the valve 19 opens the water spray port 21. A pair of jet nozzle holes 8 are formed in the peripheral wall of the nozzle portion 4 so as to face each other and be inclined in the lateral direction. The jet nozzle hole 8 has a function as a driving unit that rotationally drives the nozzle unit 4. That is, fire extinguishing water is jetted from the jet nozzle hole 8 in the direction opposite to the rotation direction of the nozzle portion 4, and the nozzle portion 4 is rotated by using the reaction force of the jetted water jet.

Four slit holes 4a are formed in the bottom of the nozzle portion 4 at intervals of about 90 degrees in the circumferential direction. From each slit hole 4a, as shown in FIG. It is discharged. Although four slit holes 4a are formed here, one or a predetermined plurality of slit holes 4a may be formed, and spot holes may be formed instead of the slit holes 4a, or a combination thereof may be used. .

A spring sheet 11 is provided on the upper surface of the flange portion 4c of the nozzle portion 4, and the spring sheet 11 and the upper cover 3 are provided.
A pressing spring 10 as a friction reduction part is interposed between the spring storage groove 3d formed on the lower surface of the pressure spring 10 and the spring storage groove 3d. Pressure spring 1
0 applies thrust force to the nozzle portion 4 to generate frictional resistance during rotation, and the frictional resistance decelerates the rotation of the nozzle portion 4.

This is because the jetting of the fire extinguishing water by the jet nozzle portion 8 for rotating the nozzle portion 4 causes the nozzle portion 4 to rotate at a considerably high speed and is emitted from the slit hole 4a of the nozzle portion 4. The fire-extinguishing water in a lump form is dispersed into particles, and it becomes impossible to form a spray pattern that concentrates water on a specific part within the protection area. Since the amount of water is reduced and the striking power of fire extinguishing water is also reduced,
Fire extinguishing ability is reduced. In order to prevent this and form a spray pattern that sprays water intensively, a pressure spring 10 as a friction reduction part is provided.

Reference numeral 14 is a link connected by a solder portion 15. An arm 13 is attached to each end of the link 14, and the arm 13 is engaged with the inner upper end of the bearing collar portion 7 of the nozzle body 2. . The arm 13 holds the support plate 16, the support plate 16 presses and supports the nozzle portion 4 via the support pin 17, and the water spray port 21 of the upper cover 3 is closed by the valve 19.

That is, the solder portion 15, the link 14, the arm 13, the support plate 16, and the support pin 17 constitute a thermosensitive decomposition portion 12 as a whole, and the thermosensitive decomposition portion 12 is incorporated in the opening 7a of the nozzle body 2. During normal monitoring, the nozzle part 4 is pressed and supported, and the valve 19 is used to sprinkle the spout 2
When 1 is closed and pyrolysis occurs due to the occurrence of fire, the nozzle portion 4 descends and the valve 19 opens the sprinkler port 21.

Next, the operation will be described. During normal monitoring, as shown in FIG. 2, the opening 7a of the nozzle body 2 is
The nozzle plate 4 is pressed and supported by the support plate 16 of the heat-decomposable part 12 incorporated into the nozzle via the support pin 17, and the water spray port 21 of the upper cover 3 is attached to the mounting shaft 18 of the nozzle part 4.
It is closed by a valve 19 provided in the. Therefore, the fire extinguishing water supplied to the inflow passage 20 is not sprinkled from the nozzle portion 4.

When a fire occurs, the solder portion 15 is melted by the heat of the fire, and the thermosensitive decomposition portion 17 is decomposed and falls.
Therefore, as shown in FIG. 3, the nozzle portion 4 descends due to its own weight, the urging force of the pressing spring 10 and the pressure of the fire extinguishing water in the inflow passage 20, and the bearing collar portion 7 formed at the lower end portion of the nozzle body 2 is moved. The valve 19 is engaged through the ball 6 and the valve 19
The water spout 21 of is opened.

The fire extinguishing water passes through the inflow passage 20 and the sprinkling port 21 as shown by arrows A and B, enters the nozzle portion 4 through the nozzle body 2, and as shown by arrow C, the jet hole 4a.
Sprinkle water in a specific spray pattern on a specific area within a more specific protection area. Further, as indicated by an arrow D, a water jet is jetted from the jet nozzle hole 8 and the nozzle portion 4 is rotated by utilizing the reaction force of the water jet. in this case,
Since the pressing spring 10 applies a thrust force to the nozzle portion 4 to generate frictional resistance, the rotation of the nozzle portion 4 is decelerated by the frictional resistance of the pressing spring 10.

That is, as shown in FIG. 1, the nozzle portion 4 is rotated by utilizing the reaction force of the water jet 9 ejected from the jet nozzle hole 8 formed on the side wall of the nozzle portion 4, but the water jet 9 alone is used. Since the nozzle portion 4 rotates at a fairly high speed, the nozzle portion 4 is decelerated by frictional resistance due to the thrust force of the pressing spring 10 against the nozzle portion 4, and the nozzle portion 4 is rotated at a relatively low speed. Water is discharged from each of the four slit holes 4a in a water discharge pattern 5 as shown in FIG.

With these four water discharge patterns 5, a band-shaped spray pattern 22 as shown in FIG. 4 is obtained. The strip-shaped spray pattern 22 forms a cross-shaped spray pattern within the protection area 23, and when the nozzle portion 4 rotates in the direction indicated by arrow E, the central portion 22a serves as the center of the arrow F.
It rotates in the direction shown by and scans a predetermined protection area 23.
By scanning the spray pattern 22, water is sprayed over the entire protection area 23 to extinguish the fire.

5A and 5B show a predetermined protection range 23.
It is a graph which showed the time change of the amount of water spray seen from one certain place in FIG. 5, FIG. 5 (A) is the amount of water spray of the conventional water spray nozzle for fire extinguishing, and FIG. 5 (B) is of this embodiment. It shows the change over time in the amount of water sprayed by a water spray nozzle for fire extinguishing. As shown in FIG. 5 (A), a fixed amount of water is conventionally emitted, but in the present invention, as shown in FIG. 5 (B), it is intensively emitted to a specific part within the protection range 23. Since scanning is performed, a large amount of water is intermittently emitted when viewed from a certain position within the protection area 23.

As described above, when the fire extinguisher sprinkler nozzle of the present invention is used, a large amount of the fire extinguishing liquid is instantaneously emitted from a conventional sprinkler nozzle against a fire when seen from a certain part of the protection area 23, and therefore, it is constant. Higher fire extinguishing ability can be obtained by sprinkling a large amount of water with a momentary concentration rather than continuously sprinkling water. Therefore, as compared with the conventional spraying nozzle for radiating the whole area of 80 liters / minute 23 of radiation, for example, when the scanning is performed at 40 liters / minute at about 1 rpm, the protection area 2
Higher fire extinguishing capacity is obtained in spite of the overall low water volume of 3.

Since the fire can be extinguished with a small amount of radiation, so-called water damage can be reduced. From this, the water tank for fire extinguishing water can be made small. In addition, when the fire extinguishing capacity is equivalent to the conventional one, the water pressure in the piping can be suppressed as compared with the conventional one, so the pump has a small capacity, and the backup equipment such as private power generation equipment also has a small capacity, and the piping size is also small. Therefore, the cost is reduced.

Further, when viewed from a certain point within the protection range 23, compared with the conventional case where water is sprayed over the entire protection range 23, the present invention instantaneously increases the amount of water sprayed, and at the same time, extinguishes the fire extinguishing material. Since the hitting force of the water and the particle size are also increased, the fire extinguishing ability is increased. That is, in the present invention, the water is not dispersed particles but is sprayed on the fire extinguishing object as a mass of water with a strong striking force that is concentratedly sprayed on a specific part, so that the fire does not lose to the fire air flow. The fire-extinguishing ability is enhanced by reaching the deep part of the area, and the time to suppress the fire is short, and therefore the amount of water until the fire is extinguished is small. Moreover, since the fire is extinguished with water in a lump state, the once extinguished part will not be burned again, and the once extinguished place can be continuously extinguished.

FIG. 6 shows the sprinkling of the present invention in comparison with the prior art. FIG. 6 (C) shows a conventional spraying pattern. In the conventional water spray nozzle, in order to spray water uniformly over the entire protection area, water is dispersed by the deflector and is sprayed in the form of granules. A spot-shaped spray pattern 26 of granular water having various sizes having relatively small particle diameters can be obtained.

Therefore, when the momentum of the fire is strong, the dispersed water has a small particle size, so it evaporates before it reaches the deep part of the flame 24 due to the loss of the air flow of the fire, and it takes time to suppress the fire. There are also cases where you cannot extinguish a fire at all. As a result, the amount of water increases and the damage caused by water loss increases. Furthermore,
Seen from a certain point in the protection area 23, even if the fire 24 of the fire at that point is momentarily weakened by the granular water,
The water once splashed by the flame 24 near that point evaporates, and the flame near it starts to burn again. Therefore, it takes time to completely extinguish the fire.

FIGS. 6 (A) and 6 (B) show the water sprinkling according to the present invention, in which a spraying pattern 22 for discharging a large amount of water in a concentrated manner is formed in a certain portion within the protection area 23. For this reason, the sprinkling amount increases instantaneously, and at the same time, the striking force and the particle size of the water hitting the fire extinguishing object also increase, so the fire extinguishing ability increases. That is,
In the spraying pattern 22 of the present invention, the fire extinguishing water is as shown in FIG.
It is not dispersed like the particle like (C), but is sprayed on the fire-extinguishing object as a lump of water with a strong hitting force that is concentratedly sprayed on a specific portion. For this reason, the flame 2
The fire extinguishing ability is enhanced by reaching the deep part of 4, and the time until fire suppression is short, and therefore the amount of water until extinguishing the fire is small.

Further, as shown in FIG.
Since the entire area within the protection area 23 is scanned to extinguish the fire with massive water, the extinguished part 25 that has been extinguished once does not burn up again, and the extinguished location can be continuously extinguished. Further, since the nozzle portion 4 is formed so as to discharge a large amount of water to a certain portion within the protection range 23, the protection range 2
Even if 3 is larger than the conventional water spray nozzle,
By adjusting the scanning time, a large amount of water can be emitted instantaneously in the event of a fire, and fire extinguishing performance equivalent to or better than the conventional one can be obtained. The number of installations can be reduced.

For example, the installation pitch can be set to 2.6 m as compared with the case where the eight spray nozzles 1 are installed in a predetermined protection range with the installation pitch of 2.3 m, and the number of the spray nozzles 1 to be set is set. Can be reduced to four. FIG. 7 shows a form of the spray pattern 22 sprayed with water from the nozzle portion 4. As shown in FIG.
Slit holes 4a that form four radius parts at intervals of 0 degree
By forming, a cross-shaped spray pattern obtained by crossing the strip-shaped spray patterns 22 in the protection area 23 as shown in FIG. 7 (A) is obtained. This scatter pattern is shown in Figure 1.
9 is a spraying pattern obtained in the embodiment shown in FIG.

Further, if the slit holes 4a which are two radius portions are formed in the nozzle portion 4 with an interval of 180 degrees, as shown in FIG. A pattern 22 is obtained. A predetermined protection area 23 is scanned by rotating in the direction of arrow F around the central portion 22a of the spray pattern 22. Further, when one slit hole 4a which is a radial portion is formed in the nozzle portion 4, a band-shaped spray pattern 22 is obtained in the radial direction in the protection area 23 as shown in FIG. 7C. A predetermined protection area 23 is scanned by rotating in the direction of arrow F around the inner end 22b of the spray pattern 22. In addition, the nozzle portion 4
When two rows of round holes 27a and 27b are formed in the radial direction and the positions of the two rows of round holes 27a and 27b are displaced from each other, as shown in FIG. A spot-shaped two-row spray pattern equivalent to the strip-shaped spray pattern 22 in the direction is obtained. A predetermined protective range 23 is scanned by rotating in the direction of arrow F around the inner end of this spot-shaped spray pattern.

Further, when three slit holes 4a are formed in the nozzle portion 4 at intervals of a predetermined angle in the radial direction,
As shown in FIG. 7 (E), in the protection area 23, a spray pattern 22 is obtained in which three bands extend in the radial direction. A predetermined protection area 23 is scanned by rotating in the direction of arrow F around the inner end of the spray pattern 22.
The spray pattern 22 is not limited to the one shown in FIG. 7A, but the same effect can be obtained by using the patterns shown in FIGS. 7B to 7E.

FIG. 8 is a sectional view showing a second embodiment of the fire extinguisher water spray nozzle of the present invention. In this embodiment, the water turbine 30
The nozzle portion 4 is rotated by the above, and the rotation of the nozzle portion 4 is decelerated by the pressing of the spring. In FIG. 8, 2
Reference numeral 8 denotes a rotating shaft that penetrates the inflow passage 20 and the sprinkling port 21 of the upper cover 3 and projects into the nozzle portion 4. One end of the rotating shaft 28 is a fixed portion formed at the center inside the bottom portion of the nozzle portion 4. Four
The water turbine 30 is attached to the other end of the rotating shaft 28 as a drive unit for rotating the rotating shaft 28 by the water flow of the fire extinguishing water. The rotating shaft 28 has a packing 19b and a valve at a substantially central portion thereof. A valve 19 composed of a body 19a is provided. In this embodiment, the jet nozzle hole 8 as shown in FIG. 2 is not formed in the nozzle portion 4. The other structure of this embodiment is similar to that of FIG.

Next, the operation will be described. At the time of normal monitoring, as shown in FIG. 8, the heat-sensitive decomposition section 12 presses and supports the nozzle section 4 by the support plate 16 via the support pin 17, and the sprinkler port 21 of the upper cover 2 has the water spray port 21.
Closed by 9. When a fire occurs, solder part 1
5 is melted, the thermal decomposition part 12 is thermally decomposed and dropped, and the nozzle part 4 pressed and supported by the thermal decomposition part 12 descends and engages with the bearing collar part 7 of the nozzle body 2 via the ball 6. To meet. Therefore, the sprinkling port 21 of the upper cover 3 is opened by the ball portion 19.

This operating state is shown in FIG. 9, and the water wheel 30 is rotated by the water flow of the fire extinguishing water flowing into the inflow passage 20 of the upper cover 3 as shown by the arrow A, and the rotation of the rotary shaft 28 causes the nozzle to rotate. The part 4 is driven to rotate. In this case, the pressing spring 10 as a friction deceleration portion applies a thrust force to the nozzle portion 4 to generate a friction resistance, and the friction resistance decelerates the rotation of the nozzle portion 4.

Further, as shown by arrows B and C, the fire extinguishing water enters the nozzle portion 4 from the inflow passage 20 through the sprinkler port 21 and the nozzle body 2 and is discharged from the slit hole 4a. Also in this embodiment, the water spray pattern 5 as shown in FIG. 4 is used to form the spray pattern 22 for intensively spraying water on a specific portion within the protection range, and by scanning this spray pattern 22, the entire area within the protection range is covered. Watered.

FIG. 10 is an explanatory diagram of a modification of the first embodiment shown in FIG. This embodiment is characterized in that a bearing is used instead of the ball 6 of FIG. 1 and a jet nozzle groove is used instead of the jet nozzle hole 8. 11, in this embodiment, a bearing 32 is used instead of the ball 6 of FIG. The outer case 32a of the bearing 32 is fixed to the inner upper surface of the bearing collar portion 7 of the nozzle body 2 and the inner inner circumference of the cylindrical portion, and the inner case 32b of the bearing 32 is fixed to the outer circumference of the upper peripheral wall 4b of the nozzle portion 4, A bearing ball 32c is interposed between the outer case 32a and the inner case 32b. By using this bearing 32, the nozzle portion 4
I try to make the rotation of the car even smoother.

A plurality of jet nozzle grooves 4g inclined vertically are formed on the peripheral wall 4f of the nozzle portion 4. The jet nozzle groove 4g has a function as a driving unit that ejects the water jet 9 and rotationally drives the nozzle unit 4 by its reaction force. Other configurations are similar to those in FIGS. 1 and 2. In the event of a fire, as shown in FIG. 10, a water jet 9 jets downward from the jet nozzle groove 4g, and the reaction force of the water jet 9 causes the nozzle portion 4 to move.
Rotates in the direction indicated by arrow E through the bearing 32.

In this case, the pressing spring 1 as the friction reduction unit
0 applies a thrust force to the nozzle portion 4 to generate frictional resistance, and the frictional resistance decelerates the rotation of the nozzle portion 4. In this way, water is discharged from the slit holes 4a of the nozzle portion 4 which rotates at a relatively low speed in four water discharge patterns 5 as shown in FIG. 10, and a cross-shaped water spray is made in the protection area 23 as shown in FIG. 7 (A). A pattern 22 is obtained. In this embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 11 is a sectional view showing a third embodiment of a fire extinguisher sprinkling nozzle. In this embodiment, the embodiment of FIG. 1 is an open type, and the drive unit and the friction reduction unit are the same as in the first embodiment. In FIG. 11, the water spray port 21 of the upper cover 3 is always open, and the fire extinguishing water is not supplied to the inflow passage 20 from the fire extinguishing pipe connected to the connection screw portion 39 during normal monitoring. The nozzle portion 4 is engaged with a bearing collar portion 7 formed at the lower end of the nozzle body 2 via balls 6. Between the spring seat 11 provided on the upper end of the nozzle portion 4 and the spring accommodating groove 3d formed on the lower surface of the upper cover 3, a pressing spring 10 as a friction reduction portion is interposed so as to apply a thrust force to the nozzle portion 4. ing.

In this embodiment, the heat-sensitive decomposition section 12, the mounting shaft 18, and the valve 19 as shown in FIG. 2 are not provided. Other configurations are similar to those in FIG.
This fire extinguisher sprinkling nozzle 1 is provided with an electric valve in the middle of the fire extinguishing pipe, and the electric valve is opened in response to a fire sensor notification.
It is installed in an open fire extinguishing facility that supplies fire extinguishing water from a fire extinguisher pipe.

Next, the operation of FIG. 11 will be described. During normal monitoring, the motor-operated valve is closed, and fire extinguishing water is not supplied to the nozzle portion 4. Therefore, water is not discharged from the nozzle unit 4. The fire detector (not shown) is under monitoring. When a fire breaks out, the fire detector detects it,
The fire detection signal is output to the disaster prevention control panel (not shown). Upon receiving the fire detection signal, the disaster prevention control panel outputs an opening control signal to the electric valve to open the electric valve.

Therefore, the water for extinguishing fire enters the nozzle portion 4 through the inflow passage 20, the sprinkling port 21, and the nozzle body 2, and is jetted from the jet nozzle hole 8. The nozzle portion 4 is rotated by utilizing the reaction force of the water jet from the nozzle hole 8. In this case, frictional resistance is generated by the thrust force of the pressing spring 10 with respect to the nozzle portion 4, and the rotation of the nozzle portion 4 is decelerated.

On the other hand, water is discharged from the slit hole 4a of the nozzle portion 4 in a water discharge pattern 5 as shown in FIG.
The scanning is performed in the scatter pattern 22 as shown in (A). When fire extinguishing is completed by such scanning, the fire detector outputs a restoration signal to the disaster prevention control panel, and the disaster prevention control panel outputs a close control signal to the electrically operated valve to close the electrically operated valve.
The water flow disappears when the motor-operated valve is closed, and the nozzle portion 4 stops rotating. The observer may stop the watering by operating the manual valve regardless of the restoration signal from the fire detector.

Further, instead of the motor-operated valve, a simultaneous opening valve may be connected to the fire extinguishing pipe, and the simultaneous opening valve may be opened by the operation of the thermal head to discharge the nozzle portion 4. In this embodiment, the same effect as that of the first embodiment can be obtained. FIG. 12 is a sectional view showing a fourth embodiment of the fire extinguisher sprinkling nozzle of the present invention. In this embodiment, instead of the jet nozzle hole 8 as the driving unit in FIG. 11, the nozzle unit 4 is rotated by the water wheel 30 shown in FIG. 8 and the rotation of the nozzle unit 4 is decelerated by pressing the pressing spring 10. . In this embodiment, the same effect as that of the first embodiment can be obtained.

FIG. 13 shows a fifth extinguishing nozzle of the present invention.
It is sectional drawing which shows embodiment. This embodiment is characterized in that the nozzle portion 4 is rotated by the water jet and the rotation of the nozzle portion 4 is decelerated by the rotary damper. In FIG. 13, a rotary damper 34 is fixed to the lower surface of the upper cover 3, and a damper shaft 35 projects downward from the rotary damper 34. A driven gear 36 is fixed to the damper shaft 35, and the driven gear 36 rotates integrally with the damper shaft 35. An internal gear 37 meshes with the driven gear 36, and the internal gear 37 is fixed to the inner wall of the nozzle portion 4.

FIG. 14 is a sectional view taken along the line AA in FIG. 13. An internal gear 37 fixed to the inner wall of the nozzle portion 4 meshes with a driven gear 36, and the driven gear 36 is a rotary shaft via a damper shaft 35. It is connected to the damper 34. When the nozzle unit 4 is rotated by the reaction force of the water jet, the rotational force is transmitted from the internal gear 37 to the driven gear 36, and the rotation of the driven gear 36 is decelerated by the rotary damper 34.

The rotary damper 34, the driven gear 36, and the internal gear 37 constitute a friction reduction unit for reducing the speed of the nozzle unit 4. Other configurations are the same as those in FIG. When a fire occurs, the heat-decomposing unit 12 is disassembled and falls, and the valve 19 opens the water spout 21 of the upper cover 3 as shown in FIG. The nozzle portion 4 descends by water pressure and engages with the bearing collar portion 7 of the nozzle body 2 via balls 6.

From the inflow passage 20 to the water spout 21, the nozzle body 2
The fire extinguishing water indicated by the arrows A and B which has passed through the nozzle portion 4 is discharged from the slit hole 4a in the water discharge pattern 5 as shown in FIG. Watering is concentrated. Further, as shown by an arrow D, the water is jetted from the jet nozzle hole 8 as a water jet,
The nozzle portion 4 is rotated by utilizing the reaction force of this water jet. In this case, the rotation of the nozzle portion 4 is transmitted from the internal gear 37 to the driven gear 36, and the driven gear 3
The rotary valve 34 in which 7 is fixed to the damper shaft 35 is decelerated. Therefore, the spray pattern from the nozzle unit 4 scans within the protection range and is sprayed over the entire area.

In this embodiment, the same effect as in the first embodiment can be obtained. 13 to 15 show a closed type water spray nozzle for extinguishing a fire having a heat sensitive portion, it may be an open type which is always in a state as shown in FIG. 15 without a heat sensitive portion. FIG. 16 is a sectional view showing a sixth embodiment of the fire extinguisher sprinkling nozzle of the present invention. In this embodiment, the pressing spring 1 shown in FIG.
In place of 0, a friction reduction unit including a rotary damper 34, a driven gear 36 and an internal gear 37 is provided,
The rotation of the nozzle unit 4 is decelerated. Other configurations are similar to those in FIG. Also in this embodiment, the thermal decomposition part 12 may be omitted, and the open type in which the nozzle part 4 is constantly engaged with the bearing collar part 7 of the nozzle body 2 may be used. Also in these embodiments, the same effect as the first embodiment can be obtained.

In the embodiments shown in FIGS. 1 and 13, the nozzle portion 4 is rotated by jetting fire extinguishing water from the jet nozzle hole 8 provided around the nozzle portion 4, but the slit hole 4a is formed. The nozzle portion 4 may be rotated obliquely, and the nozzle portion 4 may be rotated by the reaction force of the water spray pattern 5 that sprays water obliquely from the slit hole 4.

[0056]

As described above, according to the present invention, a spraying pattern is formed so as to intensively spray a certain portion within the protection range, and scanning is performed within the protection range. On the other hand, since a large amount of fire extinguishing liquid is emitted instantaneously, a higher fire extinguishing ability can be obtained and damage caused by water loss can be reduced.

Further, when the extinguishing ability is equivalent to that of the conventional one, the water pressure in the pipe can be suppressed, the capacity of the water tank, the pump, etc. becomes small, the pipe size becomes small, and there is a part within the protection range. Since the nozzle part was formed to spray water intensively on the nozzle, the same fire extinguishing ability as the conventional one can be maintained even if the protection range is wider than before, so the number of nozzles installed can be reduced, resulting in cost reduction. can do.

[Brief description of drawings]

FIG. 1 is an explanatory view of a first embodiment of a fire extinguisher sprinkling nozzle of the present invention.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a sectional view of the operating state of FIG.

FIG. 4 is an explanatory view of the installation state of the fire extinguisher sprinkler nozzle of FIG. 1 and the sprinkling operation during a fire.

FIG. 5 is a time chart showing the amount of water sprinkling according to the present invention seen from one position in the protection range, in comparison with the conventional case.

FIG. 6 is an explanatory view showing how a fire is extinguished by the spraying pattern of the present invention in comparison with a conventional one.

FIG. 7 is an explanatory view showing types of spray patterns according to the present invention.

FIG. 8 is a sectional view of a second embodiment of a fire extinguisher sprinkling nozzle according to the present invention.

9 is a sectional view of the operating state of FIG.

FIG. 10 is an explanatory diagram of a modified example of the first embodiment of FIG.

FIG. 11 is a sectional view of a fire extinguisher sprinkling nozzle according to a third embodiment of the present invention.

FIG. 12 is a sectional view of a fire extinguisher sprinkling nozzle according to a fourth embodiment of the present invention.

FIG. 13 is a sectional view of a fire extinguisher sprinkling nozzle according to a fifth embodiment of the present invention.

14 is a sectional view taken along line AA of FIG.

FIG. 15 is a sectional view of the operating state of FIG.

FIG. 16 is a sectional view of a fire extinguisher sprinkling nozzle according to a sixth embodiment of the present invention.

FIG. 17 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 1: Water spray nozzle for fire extinguishing 2: Nozzle body 4: Nozzle part 8: Jet nozzle hole 10: Pressing spring 22: Spraying pattern 30: Water wheel 34: Rotary damper

Claims (7)

[Claims] 1. A water spray method for a fixed-type fire extinguishing system, which comprises extinguishing a fire by spraying a fire extinguisher liquid or water for extinguishing water from a nozzle portion of a fire extinguisher water spray nozzle connected to a fire extinguisher pipe during a fire. From the nozzle part of the fire extinguisher spraying nozzle, the fire extinguishing liquid or the fire extinguisher water is concentratedly sprayed on a specific part within a predetermined protection range to form a predetermined spraying pattern, and the water flow at the time of spraying the nozzle part is a driving source. The fixed fire extinguisher is characterized in that the nozzle part is rotated by a frictional resistance to reduce the rotation, and the spray pattern is scanned within the predetermined protection range to spray water over the entire predetermined protection range. How to water equipment. 2. A fire extinguisher nozzle for a fixed type fire extinguishing equipment, which is connected to a fire extinguishing pipe to which the fire extinguishing liquid or water for extinguishing water is pumped, sprinkles the fire extinguisher liquid or water for extinguishing water in a prescribed range of protection. A swirlable nozzle part that forms a spray pattern that concentrates water on a part, and the nozzle part is driven to rotate by using a water flow for spraying the fire-extinguishing liquid or water for extinguishing water from the nozzle part, and the spray pattern. A drive unit for scanning the inside of the predetermined protection range to spray water over the entire predetermined protection range, and a friction reduction unit for reducing the rotation of the nozzle unit by the drive unit by frictional resistance. Characteristic water spray nozzle for fire extinguishing. 3. The fire extinguisher water spray nozzle according to claim 2, wherein the drive unit is a jet water flow rotation mechanism that ejects a water flow from the nozzle unit and rotates the water flow by a reaction force thereof. Sprinkler nozzle. 4. The fire extinguisher sprinkling nozzle according to claim 2, wherein the drive unit is a water wheel mechanism that is rotated by the water flow of the fire extinguishing liquid or the fire extinguishing water supplied to the nozzle unit. Fire extinguisher nozzle. 5. The fire extinguisher water spray nozzle according to any one of claims 2 to 4, wherein the friction deceleration portion is a pressing spring mechanism that applies a thrust force to the nozzle portion to generate frictional resistance. A water spray nozzle for extinguishing fires. 6. The fire extinguisher water spray nozzle according to any one of claims 2 to 4, wherein the friction reduction unit is a rotary damper gear-connected to the nozzle unit. . 7. The water spray nozzle for extinguishing a fire according to any one of claims 2 to 6, wherein the nozzle portion supports a water discharge port that opens inside in a closed state in a steady monitoring state, and keeps a predetermined temperature due to a fire. A water spray nozzle for extinguishing a fire, comprising a heat-sensitive actuating mechanism which reaches and leaves to open the water discharge port.