Fire nozzle and fire extinguishing equipment

Abstract

To provide a fire-extinguishing nozzle that can reduce initial cost and running cost of equipment by reducing a lift of a fire-extinguishing pump for supplying water to a fire-extinguishing nozzle and reducing output power.SOLUTION: A fire-extinguishing nozzle 9 includes: a proximal side part 15 connected and fixed to piping 5; a fire-extinguishing agent supply port 14 formed in a part of a first hollow part 19 connected to the piping 5, and supplied with a fire-extinguishing agent 7; and a fire-extinguishing agent discharge part 13 formed into a spiral shape continuously from the fire-extinguishing agent supply port 14 and discharging the fire-extinguishing agent 7 supplied to the fire-extinguishing agent supply port 14.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a fire extinguishing nozzle and fire extinguishing equipment.

Background Art

[0002] Conventionally, there is known a multi-type water discharge head (fire extinguishing nozzle) in which a plurality of annular rows of water spray holes are arranged side by side in a bowl-shaped deflector, and the water spray holes in a plurality of upper and lower rows are drilled alternately up and down (see Patent Document 1). By using the conventional multi-type water discharge head, uniform spraying can be performed even when water is sprayed over a wide area. Conventionally, in fire extinguishing equipment such as a large space in a commercial facility, fire extinguishing is performed by discharging water from a water fire extinguishing nozzle (water discharge head) from a high ceiling portion of a building at the time of a fire.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the fire extinguishing equipment using the fire extinguishing nozzle etc. described in Patent Document 1, water is sprayed at a water spray rate of 1,000 L / min in a required water spray area having a diameter of 10 m. It is assumed that the discharge pressure of the water discharge head at this time is as high as 0.25 MPa to 0.5 MPa.

[0005] However, in the conventional fire extinguishing equipment, the pressure of the fire extinguishing agent such as water supplied to the fire extinguishing nozzle must be increased. Therefore, there is a demand to reduce the initial cost and running cost of the equipment by reducing the head and output of the fire pump that supplies water to the fire extinguishing nozzle of the fire extinguishing equipment.

[0006] The object of the present invention is to provide a fire extinguishing facility that can reduce the initial cost and running cost of the facility by reducing the head and output of a fire pump that supplies water to a fire nozzle, and a fire nozzle used in this fire extinguishing facility. Further, the object is to provide a fire nozzle with a design that enhances the design quality by using a spiral water discharge head as compared with a conventional bowl-shaped water discharge head, and has a spiral shape that reminds people of ice cream, and has a design that does not feel out of place in commercial relocation.

Means for Solving the Problems

[0007] The first invention has a base end side part fixedly connected to a pipe, a fire extinguishing agent supply port formed at a part of a first cavity part connected to the pipe and to which a fire extinguishing agent is supplied, and a spiral shape continuously formed from the fire extinguishing agent supply port. and a fire extinguishing agent discharge part for discharging the fire extinguishing agent supplied to the fire extinguishing agent supply port. When the fire extinguishing agent at a predetermined pressure between 0.1 MPa and 0.2 MPa is supplied to the fire extinguishing agent supply port, from the fire extinguishing agent discharge part located 6 m above the plane, within a circle with a diameter of 11 m of the plane centered on the fire extinguishing agent discharge part, 1 m 2 is configured to discharge a predetermined amount of the fire extinguishing agent between 5 L / min and 7 L / min per It is configured to include a base end side portion connected to the pipe and a spiral tip end side portion protruding from the base end side portion. A first cavity portion connected to the pipe is provided in the base end side portion. A second cavity portion connected to the first cavity portion is provided in the tip end side portion. The fire extinguishing agent supply port is formed at a portion of the first cavity portion connected to the pipe. The fire extinguishing agent discharge portion is provided at the tip end side portion. The fire extinguishing agent flowing through the pipe, the first cavity portion, and the second cavity portion is configured to be discharged from the fire extinguishing agent discharge portion. The direction from the first cavity portion to the second cavity portion is a direction from top to bottom. The discharge direction of the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is a direction intersecting with the direction from top to bottom. A first fire extinguishing agent guide surface, a second fire extinguishing agent guide surface, and a third fire extinguishing agent guide surface are provided at the tip end side portion. The first fire extinguishing agent guide surface is disposed at a portion of the tip end side portion on the base end side portion side. The second fire extinguishing agent guide surface is disposed at the tip end side portion on the opposite side of the base end side portion with the first fire extinguishing agent guide surface in between. The third fire extinguishing agent guide surface is disposed at the tip end side portion on the opposite side of the first fire extinguishing agent guide surface with the second fire extinguishing agent guide surface in between. The first fire extinguishing agent guide surface is configured to discharge the fire extinguishing agent discharged from the fire extinguishing agent discharge portion in a first direction. The third fire extinguishing agent guide surface is configured to discharge the fire extinguishing agent discharged from the fire extinguishing agent discharge portion in a second direction. The shape of the cross-section of the tip end side portion where the first fire extinguishing agent guide surface is disposed, taken by a plane including the central axis of the spiral of the tip end side portion, is formed in a rectangular shape. A predetermined one of the four sides of the rectangular cross-section serves as the first fire extinguishing agent guide surface. The end of the predetermined one side on the side opposite to the central axis side of the spiral of the tip end side portion is located on the base end side portion side more than the end of the predetermined one side on the central axis side of the spiral of the tip end side portion. The intersection angle between the predetermined one side and the central axis of the spiral of the tip end side portion is a predetermined angle between 45° and less than 75°. The second fire extinguishing agent guide surface causes the fire extinguishing agent discharged from the fire extinguishing agent discharge portion to beconfigured to be discharged in a third direction between a first direction by the first fire extinguishing agent guide surface and a second direction by the third fire extinguishing agent guide surface It is a fire nozzle.

[0009] The third invention is A base end side portion fixedly connected to a pipe, a fire extinguishing agent supply port formed at a portion of a first cavity portion connected to the pipe and to which a fire extinguishing agent is supplied, and a fire extinguishing agent discharge portion formed continuously and spirally from the fire extinguishing agent supply port for discharging the fire extinguishing agent supplied to the fire extinguishing agent supply port. It is configured to include a base end side portion connected to a pipe and a spiral tip side portion protruding from the base end side portion. The base end side portion is provided with a first cavity portion connected to the pipe, and the tip side portion is provided with a second cavity portion connected to the first cavity portion. The fire extinguishing agent supply port is formed at a portion of the first cavity portion connected to the pipe, and the fire extinguishing agent discharge portion is provided at the tip side portion. The fire extinguishing agent that has flowed through the pipe, the first cavity portion, and the second cavity portion is configured to be discharged from the fire extinguishing agent discharge portion. The direction from the first cavity portion to the second cavity portion is a direction from top to bottom, and the discharge direction of the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is a direction intersecting the direction from top to bottom. The tip side portion is provided with a first fire extinguishing agent guide surface, a second fire extinguishing agent guide surface, and a third fire extinguishing agent guide surface. The first fire extinguishing agent guide surface is disposed at a portion of the tip side portion on the base end side portion side. The second fire extinguishing agent guide surface is disposed at the tip side portion on the opposite side of the base end side portion with the first fire extinguishing agent guide surface in between. The third fire extinguishing agent guide surface is disposed at the tip side portion on the opposite side of the first fire extinguishing agent guide surface with the second fire extinguishing agent guide surface in between. The first fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is discharged in a first direction. The third fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is discharged in a second direction. The second fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is discharged in a third direction between the first direction by the first fire extinguishing agent guide surface and the second direction by the third fire extinguishing agent guide surface. a fire nozzle configured such that the first direction is obliquely upward, the second direction is obliquely downward, and the third direction is between the obliquely upward direction and the obliquely downward direction.

[0010] In the third invention, the surface 6 m away from the fire extinguishing agent discharge part is the floor surface of a building in a commercial facility, the fire extinguishing agent discharge part is provided on the ceiling of the building, and the distance between the fire extinguishing agent discharge part and the floor surface is 6 m or more from the floor surface. The fire nozzle according to the first invention or the second invention described above.

[0011] The fourth invention is a fire extinguishing facility having a fire extinguishing agent supply unit that supplies a fire extinguishing agent, a pipe extending from the fire extinguishing agent supply unit, and a first invention that is provided in the pipe and discharges the fire extinguishing agent supplied from the fire extinguishing agent supply unit and flowing through the pipe of the third invention and a fire extinguishing nozzle according to any one of the above.

[0012] The fifth invention is that an automatic drain valve is provided in the middle of the pipe to put the fire extinguishing agent into either an open state in which the fire extinguishing agent flows into the pipe or a closed state in which the flow of the fire extinguishing agent in the pipe is blocked the fourth invention for the fire extinguishing facility described above.

Advantages of the Invention

[0014] According to the present invention, there is an effect that it is possible to provide a fire extinguishing facility capable of reducing the initial cost and running cost of the facility by lowering the head and output of a fire pump that supplies water to a fire extinguishing nozzle, and a fire extinguishing nozzle used in this fire extinguishing facility. In addition, there is an effect that it is possible to provide a fire extinguishing nozzle for a fire extinguishing facility that enhances the designability of the fire extinguishing nozzle and does not feel out of place even when exposed in a commercial space.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Fig. 15

Fig. 16

Fig. 17

Fig. 18

Embodiments for Carrying Out the Invention

[0016] The fire extinguishing equipment 1 according to an embodiment of the present invention is used, for example, in high ceiling areas such as commercial facilities. As shown in FIG. 1, it is configured to include a fire extinguishing agent supply unit 3, a pipe 5, and a fire extinguishing agent nozzle (water discharge type sprinkler head) 9. The fire extinguishing agent 7 is supplied from the fire extinguishing agent supply unit 3 in a liquid state or onto a fluid. Water is cited as the fire extinguishing agent 7.

[0017] The pipe 5 extends from the fire extinguishing agent supply unit 3, and the water 7 flows inside the pipe 5. The fire extinguishing nozzle 9 is provided on the pipe 5, and discharges the water 7 supplied from the fire extinguishing agent supply unit 3 and flowing through the pipe 5 toward the fire target.

[0018] In the fire extinguishing equipment 1, an automatic drain valve 11 is provided in the middle of the pipe 5 to put it into either an open state in which the water 7 flows into the pipe 5 or a closed state in which the flow of the water 7 in the pipe 5 is blocked. By providing the automatic drain valve 11, the secondary side of the automatic drain valve 11 is an atmosphere-open type fire extinguishing equipment 1.

[0019] The fire extinguishing nozzle 9 is configured to include a fire extinguishing agent discharge unit 13 and a fire extinguishing agent supply port 14, as shown in FIGS. 2 to 4. Water 7 with a pressure of 0.1 MPa or more is supplied to the fire extinguishing agent supply port 14. Further elaborating, as the pressure of the water 7 supplied to the fire extinguishing agent supply port 14, a predetermined pressure between 0.1 MPa and 0.2 MPa can be cited. Preferably, a predetermined pressure between 0.1 MPa and 0.15 MPa can be cited. More preferably, a predetermined pressure between 0.1 MPa and 0.12 MPa can be cited.

[0020] The fire extinguishing agent discharge part 13 is formed in a spiral shape and discharges the water 7 supplied to the fire extinguishing agent supply port 14. The fire extinguishing nozzle 9 discharges (reaches) the water 7 in an amount of 5 L / min or more (for example, 5 L / min to 7 L / min) per 1 m within a circle with a diameter of 11 m on the plane that is 6 m away from the fire extinguishing agent discharge part 13. For example, the plane that is 6 m away from the fire extinguishing agent discharge part 13 is the plane 10. The fire extinguishing agent discharge part 13 is located 6 m above the plane 10 and discharges the water 7 toward the plane 10. In plan view, the fire extinguishing agent discharge part 13 is located at the center of the circle with a diameter of 11 m. 2 It is configured to discharge (reach) the water 7 in an amount of 5 L / min or more (for example, 5 L / min to 7 L / min) per 1 m. For example, the plane that is 6 m away from the fire extinguishing agent discharge part 13 is the plane 10. The fire extinguishing agent discharge part 13 is located 6 m above the plane 10 and discharges the water 7 toward the plane 10. In plan view, the fire extinguishing agent discharge part 13 is located at the center of the circle with a diameter of 11 m.

[0021] The fire extinguishing nozzle 9 includes a base end side part 15 connected to the pipe 5 and a spiral tip side part 17 protruding from the base end side part 15. A male thread for the pipe is formed on a part of the outer periphery of the base end side part 15 for connecting and fixing to the pipe 5.

[0022] The base end side part 15 is provided with a first cavity 19 connected to the pipe 5, and the tip side part 17 is provided with a second cavity 21 connected to the first cavity 19. The fire extinguishing agent supply port 14 is formed at the part of the first cavity 19 connected to the pipe 5 (the end of the base end side part 15 on the side opposite to the tip side part 17; the upper end part). The fire extinguishing agent discharge part 13 is provided on the tip side part 17.

[0023] The water 7 flowing through the pipe 5, the first cavity 19, and the second cavity 21 is configured to be discharged from the fire extinguishing agent discharge part 13. The direction from the first cavity 19 to the second cavity 21 is the direction from top to bottom. The discharge direction of the water 7 discharged from the fire extinguishing agent discharge part 13 intersects with the direction from top to bottom. From a part of the fire extinguishing agent discharge part 13 of the fire extinguishing nozzle 9 shown in FIGS. 2 to 4, the water 7 is discharged in an obliquely upward direction.

[0024] More specifically, the tip side part 17 is provided with a first fire extinguishing agent guide surface 23, a second fire extinguishing agent guide surface 25, and a third fire extinguishing agent guide surface 27.

[0025] The first fire extinguishing agent guide surface 23 is disposed at the tip side portion 17 on the base end side portion 15 side (upper portion). The second fire extinguishing agent guide surface 25 is disposed at the tip side portion 17 on the side opposite to the base end side portion 15 with the first fire extinguishing agent guide surface 23 therebetween. The third fire extinguishing agent guide surface 27 is disposed at the tip side portion 17 on the side opposite to the first fire extinguishing agent guide surface 23 with the second fire extinguishing agent guide surface 25 therebetween. Thus, in the direction from top to bottom, the first fire extinguishing agent guide surface 23, the second fire extinguishing agent guide surface 25, and the third fire extinguishing agent guide surface 27 are arranged in this order.

[0026] The water 7 discharged from the fire extinguishing agent discharge portion 13 is configured to be discharged obliquely upward by the first fire extinguishing agent guide surface 23. The water 7 discharged from the fire extinguishing agent discharge portion 13 is configured to be discharged obliquely downward by the third fire extinguishing agent guide surface 27. The water 7 discharged from the fire extinguishing agent discharge portion 13 is configured to be discharged in a direction between the obliquely upward direction by the first fire extinguishing agent guide surface 23 and the obliquely downward direction by the third fire extinguishing agent guide surface 27 by the second fire extinguishing agent guide surface 25.

[0027] More specifically, the water 7 that has flowed in the portion of the pipe 5 near the base end side portion 15 flows through the first cavity portion 19 and the second cavity portion 21 of the fire extinguishing nozzle 9 with substantially no change in its flow direction (for example, the direction from top to bottom). After that, the direction of the flow is changed (changed to a direction intersecting with the direction from the upper side to the lower side) and discharged from the fire extinguishing agent discharge portion 13.

[0028] The water (the water immediately after exiting the fire extinguishing agent discharge portion 13) 7 immediately after being discharged from the fire extinguishing agent discharge portion 13 has a predetermined speed in the intersecting direction (roughly horizontal direction). However, due to the gravitational acceleration and air resistance, the direction of the speed is gradually changed downward to reach the fire target existing on the plane 10.

[0029] As the surface 10 that is 6 m away from the fire extinguishing agent discharge part 13, the floor surface 10 of the building 8 of a commercial facility (for example, a large-scale commercial facility) is cited. The fire extinguishing agent discharge part 13 is provided at the ceiling 12 of the building 8. The distance between the fire extinguishing agent discharge part 13 and the floor surface 10 is 6 m or more (6 m or more and 20 m or less in the vertical direction; further, 6 m or more and 12 m or less) in the vertical direction.

[0030] The fire extinguishing nozzle 9 is installed on the ceiling 12 at substantially the same height as the ceiling 12 of the building 8 in the vertical direction. Therefore, the height from the floor surface 10 to the ceiling 12 and the height from the floor surface 10 to the fire extinguishing agent discharge part 13 are substantially the same as each other. Also, the height from the floor surface 10 to the fire extinguishing agent discharge part 13 and the height from the floor surface 10 to the fire extinguishing nozzle 9 are substantially the same as each other. The fire extinguishing nozzle 9 is fixed to the ceiling 12 and does not change its position or posture with respect to the ceiling, and the distance between the fire extinguishing agent discharge part 13 and the floor surface 10 is constant. Note that the fire extinguishing nozzle 9 (fire extinguishing agent discharge part 13) may be installed at a predetermined distance below the ceiling 12.

[0031] Further explaining the fire extinguishing nozzle 9, as described above, the water 7 that has flowed through the pipe 5, the first cavity part 19, and the second cavity part 21 in this order is configured to be discharged from the fire extinguishing agent discharge part 13 toward the fire target on the floor surface 10.

[0032] Also, the value of the inner diameter of the second cavity part 21 (the inner diameter of the base end side part 15) gradually decreases as it moves away from the base end side part 15, and the value of the outer diameter of the spiral tip side part 17 also gradually decreases as it moves away from the base end side part 15.

[0033] The fire extinguishing nozzle 9 is configured to include a cylindrical base end side part 15 and a spiral tip side part 17. The base end side part 15 is provided with a fire extinguishing agent supply port 14 to which the water 7 is supplied, and a first cavity part 19 that extends from the fire extinguishing agent supply port 14 in a predetermined direction.

[0034] At the tip side portion 17, a second cavity 21 connected to the first cavity 19 and a spiral fire extinguishing agent discharge portion 13 connected to the second cavity 21 for discharging the water 7 in the second cavity 21 are formed. Further, the tip side portion 17 protrudes from the base end side portion 15 at a location different from the fire extinguishing agent supply port 14 (for example, on the side opposite to the fire extinguishing agent supply port 14).

[0035] In the first cavity 19, the water 7 supplied from the fire extinguishing agent supply port 14 flows from the base end side, which is the side of the fire extinguishing agent supply port 14, toward the tip side, which is the side of the second cavity 21. In the second cavity 21, the water 7 supplied from the fire extinguishing agent supply port 14 and flowing through the first cavity 19 flows from the base end side, which is the side of the first cavity 19, toward the tip side, which is the side opposite to the first cavity 19. Note that the flow direction of the water 7 in the first cavity 19 and the flow direction of the water 7 in the second cavity 21 are substantially the same as each other.

[0036] A first fire extinguishing agent guide surface 23 is formed on the tip side portion 17 (fire extinguishing agent discharge portion 13). And the first fire extinguishing agent guide surface 23 is configured such that the water 7 discharged from the fire extinguishing agent discharge portion 13 is discharged in an oblique first direction.

[0037] The oblique first direction by the first fire extinguishing agent guide surface 23 is a direction that combines the direction from the tip side toward the base end side in the direction connecting the base end side and the tip side to each other, and the direction away from the tip side portion 17 in the direction orthogonal to the direction connecting the base end side and the tip side to each other.

[0038] Further, a second fire extinguishing agent guide surface 25 and a third fire extinguishing agent guide surface 27 are formed on the tip side portion 17.

[0039] The first fire extinguishing agent guide surface 23 is disposed at a portion of the distal end side portion 17 on the proximal end side portion 15 side (provided at the proximal end of the distal end side portion 17). The second fire extinguishing agent guide surface 25 is disposed on the distal end side portion 17 on the side opposite to the proximal end side portion 15 with the first fire extinguishing agent guide surface 23 therebetween (provided at the middle portion of the distal end side portion 17). The third fire extinguishing agent guide surface 27 is disposed on the distal end side portion 17 on the side opposite to the first fire extinguishing agent guide surface 23 with the second fire extinguishing agent guide surface 25 therebetween (provided at the distal end of the distal end side portion 17).

[0040] Further, the water 7 discharged from the fire extinguishing agent discharge portion 13 is configured to be discharged in an oblique second direction by the third fire extinguishing agent guide surface 27.

[0041] The oblique second direction by the third fire extinguishing agent guide surface 27 is a direction that combines a direction from the proximal end side toward the distal end side in a direction that links the proximal end side and the distal end side to each other and a direction away from the distal end side portion 17 in a direction orthogonal to the direction that links the proximal end side and the distal end side to each other.

[0042] Further, the water 7 discharged from the fire extinguishing agent discharge portion 13 is configured to be discharged in a third direction between the oblique first direction by the first fire extinguishing agent guide surface 23 and the oblique second direction by the third fire extinguishing agent guide surface 27 by the second fire extinguishing agent guide surface 25.

[0043] An example of the direction between the oblique first direction and the oblique second direction on the second fire extinguishing agent guide surface 25 is given. Assuming that the oblique first direction is the 1 o'clock direction and the oblique second direction is the 5 o'clock direction, the direction between the oblique first direction and the oblique second direction is the 2 o'clock direction, 3 o'clock direction, 4 o'clock direction, etc., which are the directions between the 1 o'clock direction and the 5 o'clock direction.

[0044] As described above, the diameter of the spiral distal end side portion 17 gradually decreases as it moves away from the proximal end side portion, and the first fire extinguishing agent guide surface 23, the second fire extinguishing agent guide surface 25, and the third fire extinguishing agent guide surface 27 are formed on the distal end side portion 17.

[0045] And the direction of the normal vector of the first fire extinguishing agent guide surface 23 (the normal vector facing away from the wall thickness portion of the tip-side portion 17) is such that in the direction connecting the base end side and the tip end side, it is directed from the tip end side toward the base end side. Also, in the direction orthogonal to the direction connecting the base end side and the tip end side, it is directed toward the center of the tip-side portion 17.

[0046] Also, the direction of the normal vector of the second fire extinguishing agent guide surface 25 (the normal vector facing away from the wall thickness portion of the tip-side portion 17) is such that in the direction connecting the base end side and the tip end side, it is directed from the tip end side toward the base end side. The value of the component of the normal vector of the second fire extinguishing agent guide surface 25 in the direction orthogonal to the direction connecting the base end side and the tip end side is substantially "0".

[0047] The direction of the normal vector of the third fire extinguishing agent guide surface 27 (the normal vector facing away from the wall thickness portion of the tip-side portion 17) is such that in the direction connecting the base end side and the tip end side, it is directed from the tip end side toward the base end side. Also, in the direction orthogonal to the direction connecting the base end side and the tip end side, it is directed away from the center of the tip-side portion 17.

[0048] More specifically, the base-end side portion 15 is formed in a cylindrical shape (for example, a circular cylindrical shape). The first cavity 19 is formed in a portion hollowed out inside the cylindrical base-end side portion 15 and is, for example, in a columnar shape. The central axis of the column of the first cavity 19 and the central axis of the cylinder of the base-end side portion 15 coincide with each other. The fire extinguishing agent supply port 14 is formed as an opening (one end of the first cavity 19) on one side in the extending direction of the central axis of the column constituting the first cavity 19.

[0049] The tip-side portion 17 protrudes from the base-end side portion 15 on the side opposite to the fire extinguishing agent supply port 14. The central axis of the spiral tip-side portion 17 and the central axis of the column of the first cavity 19 (the central axis of the base-end side portion 15) coincide with each other.

[0050] The diameter (inner diameter and outer diameter) of the helix of the tip-side portion 17 gradually decreases from the base end side, which is the base end side portion 15 side, toward the tip side. The second cavity portion 21 is formed in a frustum of a cone shape. The diameter of the bottom surface of the frustum of a cone-shaped second cavity portion 21 is equal to the diameter of the columnar first cavity portion 19, and the central axis of the frustum of a cone-shaped second cavity portion 21 and the central axis of the columnar first cavity portion 19 coincide with each other.

[0051] The spiral fire extinguishing agent discharge portion 13 is formed by the gaps between the helices of the tip-side portion 17. As shown in FIG. 4(a), the cross-sectional shape of the tip-side portion 17 (the cross-sectional shape by a plane including the central axis of the tip-side portion 17) is formed in a rectangular shape such as a parallelogram shape at the first fire extinguishing agent guide surface 23. The cross-sectional shape of the tip-side portion 17 is formed in a rectangular shape close to a trapezoid at the second fire extinguishing agent guide surface 25 and the third fire extinguishing agent guide surface 27.

[0052] One side (first side) 23A of the four sides of the cross-section of the tip-side portion 17 at the first fire extinguishing agent guide surface 23 is the first fire extinguishing agent guide surface 23. The first side (fire extinguishing agent guide surface constituting side) 23A that is the first fire extinguishing agent guide surface 23 is a side facing the base end side portion 15 side (base end side). Note that the fire extinguishing agent guide surface constituting side 23A is the wall surface constituting the fire extinguishing agent discharge portion 13.

[0053] The second side 23B of the four sides of the cross-section of the tip-side portion 17 at the first fire extinguishing agent guide surface 23 is the wall surface of the second cavity portion 21 (the inner surface of the tip-side portion 17), and the third side 23C of the four sides is the outer surface of the tip-side portion 17. The fourth side 23D of the four sides is a side facing the side opposite to the base end side portion 15 and is located on the side opposite to the first fire extinguishing agent guide surface 23. Note that the fourth side 23D is also the wall surface constituting the fire extinguishing agent discharge portion 13.

[0054] Furthermore, as shown in Fig. 4(a), the intersection angle θ1 between the fire extinguishing agent guide surface forming side 23A and the central axis of the tip side portion 17 is preferably a predetermined angle between 45° and less than 75°, more preferably a predetermined angle between 60° and less than 75°, and particularly preferably a predetermined angle between 65° and 70°.

[0055] One side (the first side) 25A of the four sides of the cross-section of the tip side portion 17 at the second fire extinguishing agent guide surface 25 forms the second fire extinguishing agent guide surface 25. The first side (the fire extinguishing agent guide surface forming side) 25A faces the base end side portion 15 side (the base end side). Note that the fire extinguishing agent guide surface forming side 25A forms the wall surface constituting the fire extinguishing agent discharge portion 13. Also, the fire extinguishing agent guide surface forming side 25A intersects the central axis of the second cavity portion 21 at an angle that is perpendicular or nearly perpendicular. That is, as shown in Fig. 5(a), the intersection angle θ2 between the fire extinguishing agent guide surface forming side 25A and the central axis of the tip side portion 17 is preferably a predetermined angle between 75° and less than 110°, more preferably a predetermined angle between 75° and 95°, and particularly preferably a predetermined angle between 80° and 90°.

[0056] The second side 25B of the four sides of the cross-section of the tip side portion 17 at the second fire extinguishing agent guide surface 25 forms the wall surface of the second cavity portion 21 (the inner surface of the tip side portion), and the third side 25C of the four sides forms the outer surface of the tip side portion 17. The fourth side 25D of the four sides is a side facing the side opposite to the base end side portion 15 and is located on the side opposite to the second fire extinguishing agent guide surface 25. Note that the fourth side 25D also forms the wall surface constituting the fire extinguishing agent discharge portion 13.

[0057] One side (the first side) 27A of the four sides of the cross-section of the tip side portion 17 at the third fire extinguishing agent guide surface 27 forms the third fire extinguishing agent guide surface 27. The first side (the fire extinguishing agent guide surface forming side) 27A is a side facing the base end side portion 15 side (the base end side). Note that the fire extinguishing agent guide surface forming side 27A forms the wall surface constituting the fire extinguishing agent discharge portion 13.

[0058] Of the four sides of the cross-section of the tip-side portion 17 at the third fire extinguishing agent guide surface 27, the second side 27B is the wall surface (the inner surface of the tip-side portion) of the second cavity 21, and the third side 27C of the four sides is the outer surface of the tip-side portion 17. The fourth side 27D of the four sides is a side facing the side opposite to the base-end side portion 15 and is located on the side opposite to the third fire extinguishing agent guide surface 27.

[0059] Furthermore, as shown in Fig. 4(a), the intersection angle θ3 between the fire extinguishing agent guide surface constituent side 27A and the central axis of the tip-side portion 17 is preferably a predetermined angle between 20° and 70°, more preferably a predetermined angle between 45° and 70°, and particularly preferably a predetermined angle between 55° and 65°.

[0060] Also, as shown in Fig. 3(b), between the first fire extinguishing agent guide surface 23 and the second fire extinguishing agent guide surface 25, a surface 24 for smoothly connecting the first fire extinguishing agent guide surface 23 and the second fire extinguishing agent guide surface 25 is formed. Also, between the second fire extinguishing agent guide surface 25 and the third fire extinguishing agent guide surface 27, a surface 26 for smoothly connecting the second fire extinguishing agent guide surface 25 and the third fire extinguishing agent guide surface 27 is formed. The surface 24 and the surface 26 are formed in a triangular shape, but may also be formed in a rectangular shape such as a trapezoid. Furthermore, from the fire extinguishing agent guide surface 23 to the fire extinguishing agent guide surface 25 (the surface 24) may be smoothly continuously formed, and from the fire extinguishing agent guide surface 25 to the fire extinguishing agent guide surface 27 (the surface 26) may also be smoothly continuously formed.

[0061] The spiral tip-side portion 17 (the fire extinguishing agent discharge portion 13) is formed in a triple spiral shape. The first fire extinguishing agent guide surface 23 is formed at the first turn portion on the base-end side portion 15 side. The second fire extinguishing agent guide surface 25 is formed at the second turn portion on the side opposite to the base-end side portion 15 side with the first fire extinguishing agent guide surface 23 in between. The third fire extinguishing agent guide surface 27 is formed at the third turn portion on the side opposite to the second fire extinguishing agent guide surface 25 with the second fire extinguishing agent guide surface 25 in between.

[0062] Next, the discharge mode (spray mode) of the water 7 in the fire extinguishing nozzle 9 will be described with reference to FIGS. 5 and 6.

[0063] FIG. 5(a) shows the relationship between the discharge amount (spray amount) of the water 7 in the fire extinguishing nozzle 9 and the discharge pressure (pressure) of the water 7 in the fire extinguishing nozzle 9. The horizontal axis of FIG. 5(a) indicates the discharge amount of the water 7 in the fire extinguishing nozzle 9, and the vertical axis of FIG. 5(a) indicates the discharge pressure of the water 7 in the fire extinguishing nozzle 9. The relationship between the discharge amount of the water 7 in the fire extinguishing nozzle 9 and the discharge pressure of the water 7 in the fire extinguishing nozzle 9 is shown by the diagram L1. It can be seen from FIG. 5(a) that a spray amount of 570 L / min can be obtained at a pressure of 0.1 MPa.

[0064] FIG. 5(b) shows the relationship between the spray angle of the water 7 in the fire extinguishing nozzle 9 and the discharge pressure (pressure) of the water 7 in the fire extinguishing nozzle 9. The horizontal axis of FIG. 5(b) indicates the spray angle of the water 7 in the fire extinguishing nozzle 9, and the vertical axis of FIG. 5(b) indicates the discharge pressure of the water 7 in the fire extinguishing nozzle 9. When the water 7 is discharged from the fire extinguishing nozzle 9 with the base end side portion 15 of the fire extinguishing nozzle 9 on the upper side and the tip end side portion 17 on the lower side, since the spray angle is larger than 180°, a part of the water 7 is discharged obliquely upward.

[0065] The relationship between the spray angle of the water 7 in the fire extinguishing nozzle 9 and the discharge pressure of the water 7 in the fire extinguishing nozzle 9 is shown by the diagram L2. It can be seen from FIG. 5(b) that the spray angle becomes 220° at a pressure of 0.1 MPa.

[0066] FIG. 6 shows the discharge direction of the water 7 from the fire extinguishing nozzle 9. The horizontal axis of FIG. 6 indicates the horizontal distance from the fire extinguishing nozzle 9, and the vertical axis of FIG. 6 indicates the vertical (downward) distance from the fire extinguishing nozzle 9. The fire extinguishing nozzle 9 is installed at the point P1 in FIG. 6.

[0067] The discharge area of the water 7 in the fire extinguishing nozzle 9 installed at the point P1 is shown by the diagram L3, and the water 7 is discharged below the diagram L3. Note that the fire extinguishing nozzle 9 is shown in the upper left corner of FIG. 6.

[0068] Referring to FIG. 6, the diagram L3 passes through a point with a horizontal radius of 5.5 m at a position 1 m below the fire extinguishing nozzle 9. Also, at a position 2 m to 3 m horizontally away from the fire extinguishing nozzle 9, there is a water flow 0.6 m above the fire extinguishing nozzle 9.

[0069] Here, the fire extinguishing equipment 1 will be further described with reference to FIG. 1.

[0070] The fire extinguishing agent supply unit 3 is configured to include an underground fire extinguishing water tank 29, a fire pump (including a motor) 31, a pump control panel 35, and a pressure tank 37.

[0071] Water 7 is appropriately supplied to the fire extinguishing water tank (water storage tank) 29 from a water supply source by a makeup water supply unit 39, and the supplied water 7 is stored. The height position of the fire extinguishing water tank 29 from the ground or floor surface is not particularly specified.

[0072] The fire pump 31 is driven by a motor, and when the fire pump 31 operates, water 7 is supplied to the fire extinguishing nozzle 9 through the pipe 5. Also, compressed air is injected into the pressure tank 37. Further, a pressure switch 41 for detecting a decrease in the air pressure in the pressure tank 37 due to a decrease in the pressure in the pipe 5 after draining is provided at the pressure tank 37. The pressure switch 41 detects the pressure drop and automatically starts the fire pump 31.

[0073] In addition, the fire extinguishing equipment 1 is provided with an auxiliary elevated water tank 45, a fire detector 57, a deluge sprinkler equipment control station (deluge sprinkler equipment control panel) 61, a field operation panel 63, and an alarm receiving panel 59. The automatic drain valve 11 is provided with a pressure switch capable of detecting the water pressure on the secondary side, and is configured to detect the flowing water of water 7 in the pipe 5 on the secondary side of the automatic drain valve 11.

[0074] When the automatic drain valve 11 is in the closed state and the water 7 under pressure from the fire extinguishing agent supply unit 3 to the automatic drain valve 11 is filled, an open signal is output from the drain - type sprinkler equipment control panel 61 or the on - site operation panel 63 to the solenoid valve inside the automatic drain valve 11. As a result, the automatic drain valve 11 becomes open, and the water 7 is discharged from the fire - fighting nozzle 9.

[0075] When the automatic drain valve 11 is in the open state, a closing signal is output from the drain - type sprinkler equipment control panel 61 or the on - site operation panel 63 to the solenoid valve inside the automatic drain valve 11, whereby the automatic drain valve 11 becomes closed.

[0076] With the fire pump 31 stopped, water 7 is discharged from the fire - fighting nozzle 9, and the pressure switch 41 detects that the pressure of the water 7 in the pipe 5 (pressure tank 37) has decreased. Due to this detection, the fire pump 31 operates.

[0077] By the way, the fire - fighting nozzle 9a shown in FIG. 7 may be adopted. The fire - fighting nozzle 9a shown in FIG. 7 is different from the fire - fighting nozzle 9 shown in FIG. 4 in that the first fire - extinguishing agent guide surface 23 is not provided as the fire - extinguishing agent guide surface.

[0078] That is, in the fire - fighting nozzle 9a shown in FIG. 7, the guide surface on the proximal - end side part 15 side is the same as the second guide surface 25 shown in FIG. 4, and the guide surface on the side opposite to the proximal - end side part 15 side is the same as the third guide surface 27 shown in FIG. 4.

[0079] Furthermore, in the fire extinguishing nozzle 9a shown in FIG. 7 as well, a fourth fire extinguishing agent guide surface 28 may be provided between the fire extinguishing agent guide surface 25 on the base end side part 15 side and the fire extinguishing agent guide surface 27 on the side opposite to the base end side part 15 side. At this time, the normal vector of the fourth fire extinguishing agent guide surface 28 is a normal vector in the direction between the normal vector of the fire extinguishing agent guide surface 25 and the normal vector of the fire extinguishing agent guide surface 27 in the direction connecting the base end side and the tip side to each other, and is a normal vector in the direction between the normal vector of the fire extinguishing agent guide surface 25 and the normal vector of the fire extinguishing agent guide surface 27 in the direction orthogonal to the direction connecting the base end side and the tip side to each other.

[0080] Next, the discharge mode (spray mode) of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7 will be described with reference to FIGS. 8 and 9.

[0081] FIG. 8(a) shows the relationship between the discharge amount (spray amount) of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7 and the discharge pressure (pressure) of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7. The horizontal axis of FIG. 8(a) indicates the discharge amount of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7, and the vertical axis of FIG. 8(a) indicates the discharge pressure of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7. The line diagram L4 shows the relationship between the discharge amount of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7 and the discharge pressure of the water 7 in the fire extinguishing nozzle 9a. It can be seen from FIG. 8(a) that a spray amount of 220 L / min can be obtained at a pressure of 0.1 MPa.

[0082] FIG. 8(b) shows the relationship between the spray angle of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7 and the discharge pressure (pressure) of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7. The horizontal axis of FIG. 8(b) indicates the spray angle of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7, and the vertical axis of FIG. 8(b) indicates the discharge pressure of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7. When the water 7 is discharged from the fire extinguishing nozzle 9a shown in FIG. 7 with the base end side part 15 of the fire extinguishing nozzle 9a shown in FIG. 7 on the upper side and the tip side part 17 on the lower side, the spray angle is about 170°.

[0083] The line diagram L5 shows the relationship between the spray angle of the water 7 in the fire extinguishing nozzle 9a shown in FIG. 7 and the discharge pressure of the water 7 in the fire extinguishing nozzle 9a. It can be seen from FIG. 8(b) that the spray angle is 170° when the pressure is 0.1 MPa.

[0084] FIG. 9 shows the discharge direction of the water 7 from the fire extinguishing nozzle 9a shown in FIG. 7. The horizontal axis of FIG. 9 indicates the horizontal distance from the fire extinguishing nozzle 9a shown in FIG. 7, and the vertical axis of FIG. 9 indicates the vertical (downward) distance from the fire extinguishing nozzle 9a shown in FIG. 7. The fire extinguishing nozzle 9a is installed at the point P2 in FIG. 6.

[0085] The line diagram (broken line) L6 shows the discharge area of the water 7 in the fire extinguishing nozzle 9a installed at the point P2, and the water 7 is discharged below the line diagram L6. Note that the fire extinguishing nozzle 9a is shown in the upper left corner of FIG. 9.

[0086] Here, with reference to FIGS. 11 and 12, the nozzle 9 (including the nozzle 9a) and the fire extinguishing target area 53 by the nozzle 9 will be described.

[0087] FIG. 11 is a plan view, and the fire extinguishing target area 53 is formed in a rectangular shape in plan view. A plurality of fire extinguishing nozzles 9 (9a) are arranged at regular intervals within the fire extinguishing target area 53. The range 55 in which each of the plurality of fire extinguishing nozzles 9 (9a) discharges water 7 is shown by a plurality of circles. The plurality of circles 55 partially overlap with each other as appropriate. And, by discharging the fire extinguishing agent from the plurality of fire extinguishing nozzles 9 (9a), no area where the water 7 is not discharged is formed within the fire extinguishing target area 53.

[0088] FIG. 12 is a side view. Even if the ceiling height is different, by providing a range that discharges so as to overlap with each other at the boundary on the floor surface of the high ceiling part protected by the deluge sprinkler equipment and on the floor surface of the part other than the high ceiling protected by the closed sprinkler equipment, no area where the water 7 is not discharged is formed.

[0089] Here, the floor surface of the high ceiling part protected by the deluge sprinkler equipment using the fire extinguishing nozzle 9 (9a) refers to the part where the vertical distance between the floor surface 10 and the ceiling 12 exceeds 10 m, and the part where a large amount of combustibles exist and it is recognized that extinguishing is difficult, that is, the part where the vertical distance between the floor surface 10 and the ceiling 12 exceeds 6 m. The floor surface of the part other than the high ceiling protected by the closed sprinkler equipment using the fire extinguishing nozzle 9 (9b) refers to the part where the vertical distance between the floor surface 10 and the ceiling 12 is 10 m or less, and the part where a large amount of combustibles exist and it is recognized that extinguishing is difficult, that is, the part where the vertical distance between the floor surface 10 and the ceiling 12 is 6 m or less.

[0090] Next, the operation of the fire extinguishing equipment 1 will be described. First, the automatic start operation in the automatic start mode will be described with reference to FIGS. 13 to 15.

[0091] A fire occurs in step S1. The area fire detector senses the fire in step S2. An area fire indication is given in step S3. An alarm sounds in step S4. The AND fire detector senses the fire in step S2a. An AND fire indication is given in step S3a. An alarm sounds in step S4a. The AND condition is satisfied in step S5. The delay timer is activated in step S6. It is determined in step S7 whether an emergency stop has been performed.

[0092] The alarm stop switch is turned ON in step S8. The switch caution lamp blinks in step S9. The alarm is stopped in step S10. Area automatic selection is performed in step S11. The transfer of the fire area is made in step S12. The area selection switch lamp is lit in step S13. The start lamp blinks in step S14.

[0093] The emergency stop (manual stop) switch is turned ON in step S15. The delay timer is stopped in step S16. Area automatic selection, automatic unlocking of the operation door, and blinking of the area selection switch are performed in step S17. The start lamp blinks in step S18. The emergency stop (manual stop) switch is turned ON in step S19.

[0094] In step S20, the delay timer is typed up. In step S21, the automatic drain valve is opened. In step S22, the pressure in the primary side pipe decreases. In step S23, the pressure tank is depressurized (the pressure switch operates). In step S24, the fire pump is started. In step S25, the water discharge is started.

[0095] In step S26, the automatic drain valve water discharge signal (pressure SW signal) turns ON. In step S27, the water discharge is continued and the fire is extinguished. In step S28, the start lamp lights up. In step S29, the auxiliary pressurizing pump is operated. In step S30, the pump operation is reported. In step S31, the auxiliary pressurizing pump is stopped. In step S32, the water discharge lamp lights up. In step S33, the water discharge area is reported. In step S34, the start lamp lights up. In step S35, the discharging lamp lights up.

[0096] In step S36, the primary side control valve is closed. In step S37, the emergency stop (manual stop) switch is turned ON. In step S38, the automatic drain valve is closed. In step S39, the recovery switch is turned ON. In step S40, the various indicator lights are restored. In step S41, the sensor is restored and the report is restored. In step S42, the alarm stop switch is turned OFF. In step S43, the switch caution lamp is turned off.

[0097] In step S44, the pump stop switch is turned ON. In step S45, the recovery work is performed. In step S46, the emergency stop (manual stop) switch is turned ON. In step S47, the various indicator lights are restored and the operation door is automatically locked. In step S48, the fire pump is stopped.

[0098] The manual start operation by manual operation when the flame sensor operates or when a fire is confirmed by a person's discovery of a fire will be described with reference to FIGS. 16 to 18. The manual start can be operated in either the automatic start mode or the manual start mode.

[0099] In step S51, a detector senses the occurrence of a fire. In step S52, a zone detector senses the fire. In step S53, a zone fire indication is given. In step S54, an alarm sounds. In step S55, an alarm stop switch is turned ON. In step S56, a switch indicator light blinks. In step S57, the alarm is stopped.

[0100] In step S58, the AND condition is satisfied. In step S59, the fire zone is reported. In step S60, an AND fire detector senses the fire. In step S61, an AND fire indication is given. In step S62, an alarm sounds.

[0101] In step S63, a person discovers the occurrence of a fire. In step S64, a release instruction is given using a communication device. In step S65, a zone selection switch is turned ON. In step S66, a zone selection switch light is lit. In step S67, a release switch is turned ON. In step S68, a release light is lit. In step S69, the zone selection switch light blinks.

[0102] In step S70, the operation door is automatically released. In step S71, a person confirms the fire. In step S72, a zone selection switch is turned ON. In step S73, the zone selection switch light blinks. In step S74, the operation door is unlocked. In step S75, the zone selection switch light is lit.

[0103] In step S76, a manual start switch is turned ON. In step S77, a manual start switch is turned ON. In step S78, an automatic drain valve is opened. In step S79, the pressure in the temporary side pipe decreases. In step S80, the operating pressure tank is depressurized (the pressure switch operates). In step S81, the fire pump starts. In step 82, water discharge begins.

[0104] In step S83, the automatic drain valve drain signal (pressure SW signal) turns ON. In step S84, draining is continued to extinguish the fire. In step S85, the start lamp is lit. In step S86, the auxiliary pressure pump is operated. In step S87, the operation of the pump is reported. In step S88, the auxiliary pressure pump is stopped. In step S89, the drain lamp is lit. In step S90, the drain area is reported. In step S91, the start lamp is lit. In step S92, the draining lamp is lit.

[0105] In step S93, the primary side control valve is closed. In step S94, the emergency stop (manual stop) switch is turned ON. In step S95, the automatic drain valve is closed. In step S96, the recovery switch is turned ON. In step S97, various indicator lamps are restored. In step S98, the sensors are restored and the reporting is restored. In step S99, the alarm stop switch is turned OFF.

[0106] In step S100, the switch caution lamp is turned off. In step S101, the emergency stop (manual stop) switch is turned ON. In step S102, various indicator lamps are restored and the electric lock is locked. In step S103, the pump stop switch is turned ON. In step S104, recovery work is performed. In step S105, the fire pump is stopped.

[0107] In the fire extinguishing equipment 1, water 7 with a pressure of about 0.1 MPa is supplied to the fire extinguishing nozzles 9 (9a) to so that water 7 in an amount of 5 L / min or more per square meter is discharged within a circle with a diameter of 11 m on the surface 6 m away from the fire extinguishing agent discharge part 13. 2 It is configured in this way.

[0108] Thereby, while satisfying the conditions of the Fire Service Act, by reducing the head and output of the fire pump 31 that supplies water to the fire extinguishing nozzles 9 (9a), the initial cost and running cost of the equipment can be reduced.

[0109] More specifically, by using the fire extinguishing nozzle 9(9a) provided with the spiral fire extinguishing agent discharge part 13 in the fire extinguishing equipment 1, the value of the flow resistance of the water 7 in the fire extinguishing nozzle 9(9a) can be reduced. And one of the capabilities of the fire pump 31 with a high proportion of the total construction cost, the head (the total head of the pump = the water head converted from the design pressure of the fire extinguishing nozzle + the frictional loss water head of the piping + the head difference (the height difference from the water source water tank to the fire extinguishing nozzle)) can be simply reduced by 25 m (35 m - 10 m) in terms of the pressure-converted water head. As a result, the output of the motor of the fire pump 31 can also be reduced, the power consumption for operating the fire extinguishing equipment 1 can be reduced, and further, a fire pump 31 with a capacity reduced by two ranks can be used, and cost reduction can be achieved.

[0110] Also, in the fire extinguishing equipment 1, the water 7 discharged from the fire extinguishing agent discharge part 13 is configured to be discharged obliquely upward by the first fire extinguishing agent guide surface 23. The water 7 discharged from the fire extinguishing agent discharge part 13 is configured to be discharged obliquely downward by the third fire extinguishing agent guide surface 27. Further, the water discharged from the fire extinguishing agent discharge part 13 is configured to be discharged in a direction between the obliquely upward direction by the first fire extinguishing agent guide surface 23 and the obliquely downward direction by the third fire extinguishing agent guide surface 27 by the second fire extinguishing agent guide surface 25. Thereby, the water 7 discharged from the fire extinguishing agent discharge part 13 can be uniformly sprayed onto the fire target in a wide horizontal range.

[0111] Also, the fire extinguishing nozzle 9(9a) is configured to include a spiral tip-side part (discharge part component part) 17. The spiral tip-side part 17 has a gradually decreasing spiral diameter from the base end toward the tip end. Thereby, the fire extinguishing nozzle 9(9a) has a design property (so that an aesthetic appearance is generated through vision) and can be suitably used for the buildings of commercial facilities with a large number of people coming and going.

[0112] Furthermore, by appropriately coloring the spiral tip-side part 17, it looks like spiral soft cream placed in a cone cup, and the design property is further enhanced.

[0113] In addition, since the fire extinguishing equipment 1 is of an open type, the fire extinguishing nozzle 9(9a) itself is always adapted to allow the fire extinguishing agent 7 to pass therethrough. As a result, there is almost no variation in the pipeline resistance of the fire extinguishing nozzle 9(9a) when the fire extinguishing agent 7 flows through the fire extinguishing nozzle 9(9a), and the fire extinguishing agent 7 can be discharged in a stable state.

[0114] In the fire extinguishing equipment 1, by a predetermined operation of the deluge sprinkler equipment control panel 61, it is possible to select an automatic start mode in which water 7 is automatically discharged and a manual start mode in which water 7 is discharged by a human operation. In the case of the automatic mode, water 7 is discharged by the operation of the fire detectors 57 (both area type and AND type) that detect the occurrence of a fire. In either the automatic start mode or the manual start mode, after confirming the occurrence of a fire, water 7 can be discharged by a predetermined operation on the deluge sprinkler equipment control panel or the on-site operation panel.

[0115] In the fire extinguishing equipment 1, as shown in FIG. 10, fire detectors 57 that detect the occurrence of a fire are arranged. FIG. 10 is a plan view similar to FIG. 11, and in FIG. 10, as an example, the deluge area is divided into four areas numbered NO.1 to NO.4.

[0116] In a configuration where water 7 is automatically discharged at the time of a fire, as is already understood, when both the area type and AND type fire detectors 57 detect the occurrence of a fire, the deluge area where the fire has occurred is selected, and water 7 is discharged from the fire extinguishing nozzles 9(9a) arranged in the selected deluge area.

Explanation of Reference Numerals

[0117] 1 Fire extinguishing equipment 3 Fire extinguishing agent supply section 5 Pipe 7 Fire extinguishing agent (water) 8 Building 9, 9a Fire extinguishing nozzle 10 Surface (floor surface) 11 Automatic drain valve 12 Ceiling 13 Fire extinguishing agent discharge section 14 Fire extinguishing agent supply port 15 Base end side portion 17 tip-side part 19 first cavity 21 second cavity 23 first fire extinguishing agent guide surface 25 second fire extinguishing agent guide surface 27 third fire extinguishing agent guide surface

Claims

1. a base-end side part fixedly connected to a pipe; a fire extinguishing agent supply port formed at a part of a first cavity connected to the pipe and through which a fire extinguishing agent is supplied; a fire extinguishing agent discharge part formed continuously in a spiral shape from the fire extinguishing agent supply port and discharging the fire extinguishing agent supplied to the fire extinguishing agent supply port; having, when the fire extinguishing agent at a predetermined pressure between 0.1 MPa and 0.2 MPa is supplied to the fire extinguishing agent supply port, the fire extinguishing agent is discharged from the fire extinguishing agent discharge part located 6 m above the plane, and within a circle with a diameter of 11 m of the plane centered on the fire extinguishing agent discharge part, 1 m ２ is configured to discharge a predetermined amount of the fire extinguishing agent between 5 L / min and 7 L / min per m the base-end side part connected to the pipe; a spiral tip-side part protruding from the base-end side part; characterized by comprising: a first cavity connected to the pipe is provided in the base-end side part; a second cavity connected to the first cavity is provided in the tip-side part; the fire extinguishing agent supply port is formed at a part of the first cavity connected to the pipe; the fire extinguishing agent discharge part is provided in the tip-side part; configured such that the fire extinguishing agent flowing through the pipe, the first cavity, and the second cavity is discharged from the fire extinguishing agent discharge part; the direction from the first cavity to the second cavity is downward from above; the discharge direction of the fire extinguishing agent discharged from the fire extinguishing agent discharge part intersects the direction from above downward; a first fire extinguishing agent guide surface, a second fire extinguishing agent guide surface, and a third fire extinguishing agent guide surface are provided on the tip-side part; the first fire extinguishing agent guide surface is disposed at a part of the tip-side part on the base-end side part side; the second fire extinguishing agent guide surface is disposed on the tip-side part on the opposite side of the base-end side part with the first fire extinguishing agent guide surface therebetween; the third fire extinguishing agent guide surface is disposed on the tip-side part on the opposite side of the first fire extinguishing agent guide surface with the second fire extinguishing agent guide surface therebetween; configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge part is discharged in a first direction by the first fire extinguishing agent guide surface; configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge part is discharged in a second direction by the third fire extinguishing agent guide surface; the shape of a cross-section by a plane including the central axis of the spiral of the tip-side part where the first fire extinguishing agent guide surface is disposed is formed in a rectangular shape, and a predetermined one of the four sides of the rectangular cross-section is the first fire extinguishing agent guide surface; The end of the predetermined one side, which is on the side opposite to the central axis side of the helix of the tip side portion, is located on the base end side portion side with respect to the end of the predetermined one side on the central axis side of the helix of the tip side portion. The intersection angle between the predetermined one side and the central axis of the helix of the tip side portion is a predetermined angle between 45° and less than 75°. A fire extinguishing nozzle configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is discharged in a third direction between the first direction by the first fire extinguishing agent guide surface and the second direction by the third fire extinguishing agent guide surface by the second fire extinguishing agent guide surface.

2. A base end side portion fixedly connected to a pipe; A fire extinguishing agent supply port formed at a portion of a first cavity connected to the pipe and to which a fire extinguishing agent is supplied; A fire extinguishing agent discharge portion formed continuously in a spiral shape from the fire extinguishing agent supply port and discharging the fire extinguishing agent supplied to the fire extinguishing agent supply port; having A base end side portion connected to a pipe; A spiral tip side portion protruding from the base end side portion; and configured to include A first cavity connected to the pipe is provided in the base end side portion. A second cavity connected to the first cavity is provided in the tip side portion. The fire extinguishing agent supply port is formed at a portion of the first cavity connected to the pipe. The fire extinguishing agent discharge portion is provided at the tip side portion. The fire extinguishing agent that has flowed through the pipe, the first cavity, and the second cavity is configured to be discharged from the fire extinguishing agent discharge portion. The direction from the first cavity to the second cavity is a direction from top to bottom. The discharge direction of the fire extinguishing agent discharged from the fire extinguishing agent discharge portion is a direction intersecting with the direction from top to bottom. A first fire extinguishing agent guide surface, a second fire extinguishing agent guide surface, and a third fire extinguishing agent guide surface are provided on the tip side portion. The first fire extinguishing agent guide surface is disposed at a portion of the tip side portion on the base end side portion side. The second fire extinguishing agent guide surface is disposed on the tip side portion on the side opposite to the base end side portion with the first fire extinguishing agent guide surface in between. The third fire extinguishing agent guide surface is disposed on the tip side portion on the side opposite to the first fire extinguishing agent guide surface with the second fire extinguishing agent guide surface in between. The first fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge part is discharged in a first direction. The third fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge part is discharged in a second direction. The second fire extinguishing agent guide surface is configured such that the fire extinguishing agent discharged from the fire extinguishing agent discharge part is discharged in a third direction between the first direction by the first fire extinguishing agent guide surface and the second direction by the third fire extinguishing agent guide surface. A fire nozzle configured such that the first direction is an obliquely upward direction, the second direction is an obliquely downward direction, and the third direction is a direction between the obliquely upward direction and the obliquely downward direction.

3. The surface 6 m away from the fire extinguishing agent discharge part is the floor surface of the building of the commercial facility. The fire extinguishing agent discharge part is provided on the ceiling of the building. The fire nozzle according to claim 1 or claim 2, wherein the distance between the fire extinguishing agent discharge part and the floor surface is 6 m or more from the floor surface.

4. A fire extinguishing agent supply part for supplying a fire extinguishing agent; The pipe extending from the fire extinguishing agent supply part; The fire nozzle according to any one of claims 1 to 3, which is provided in the pipe and discharges the fire extinguishing agent supplied from the fire extinguishing agent supply part and flowing through the pipe; A fire extinguishing facility having the same.

5. The fire extinguishing facility according to claim 4, wherein an automatic drain valve is provided in the middle of the pipe to make the fire extinguishing agent flow into the pipe in an open state or block the flow of the fire extinguishing agent in the pipe in a closed state.

Images