Water spray head

Abstract

To provide a water spray head capable of reducing the used amount of water during a fire and reducing cost by miniaturizing a pump or a water tank.SOLUTION: A water spray head 1 comprises: a head body 3 that receives water supplied through a water supply pipe; and a plurality of nozzles 9, 11a, and 11b attached to the head body 3 and different in water discharge direction. The nozzles 9, 11a, and 11b communicate with the head body 3 through communication ports 13a-13c formed in the head body 3 and has an opening / closing mechanism capable of opening some communication ports 13a-13c while closing the other communication ports 13a-13c. By sequentially switching the communication ports 13a-13c opened by the opening / closing mechanism, the water discharge directions are sequentially switched.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water spray head of a water spray equipment to be installed in a tunnel. [Background technology]

[0002] For example, in tunnels for expressways, etc., water spraying equipment is installed to spray water into the tunnel in the event of a fire. This water spraying equipment is designed to prevent damage to the tunnel's inner walls from the heat of a fire that breaks out inside the tunnel. By spraying water into the tunnel in the event of a fire, the tunnel's inner walls and the tunnel space are cooled, protecting the tunnel's structure. Examples of such water spray equipment are disclosed in, for example, Patent Documents 1 to 3.

[0003] The water spraying equipment described above generally uses compartmentalized water spraying. Compartmentalized water spraying involves spraying water in individual water spray compartments that are divided into sections along the axial direction of the tunnel. In the event of a fire inside the tunnel, water is not sprayed over the entire tunnel, but only in the water spray compartment corresponding to the location of the fire. Each water spray section is provided with one automatic valve, and the secondary side of the automatic valve is connected to multiple water spray heads installed at predetermined intervals in the axial direction of the tunnel (see, for example, Figure 1 of Patent Document 1). When a fire occurs, the automatic valve in the water spray section corresponding to the fire location is opened, and water is sprayed simultaneously from all the water spray heads connected to the automatic valve. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-355324 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-177520 [Patent Document 3] Japanese Patent Application Laid-Open No. 2016-59648 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, conventional water spray equipment sprays water simultaneously from all water spray heads installed in the area corresponding to the fire location, which results in a large amount of water usage and the need for large pumps and large water tanks, which increases costs.

[0006] The present invention has been made to solve the above-mentioned problems, and aims to provide a water spray head that reduces the amount of water used in the event of a fire and reduces costs by making the pump and water tank smaller. [Means for solving the problem]

[0007] (1) The water spray head according to the present invention comprises a head body that receives water from a water supply pipe, and a plurality of nozzles that are attached to the head body and spray water in different directions, the plurality of nozzles communicate with the head body via communication ports formed in the head body; It is characterized by having an opening / closing mechanism that can open some of the communication ports while closing the others, and the water discharge direction is switched sequentially by sequentially switching the communication ports that the opening / closing mechanism opens.

[0008] (2) The water spray head according to the present invention comprises a head body that receives water from a water supply pipe, and a plurality of nozzles that are attached to the head body and have different water spray directions, The head body has an outer cylinder and an inner cylinder that is rotatable at a predetermined speed along the inner surface of the outer cylinder, the plurality of nozzles are provided to communicate with the inside of the outer cylinder through communication ports formed in the outer cylinder, The inner cylinder has an opening that can open some of the communication ports while blocking the other communication ports, and as the inner cylinder rotates, the communication ports that are opened are switched in sequence, thereby switching the water discharge direction in sequence.

[0009] (3) In addition, in the device described in (1) or (2) above, the plurality of nozzles are characterized in that the water discharge pattern varies depending on the water discharge angle.

[0010] (4) In addition, in the above (3), the plurality of nozzles are It consists of a center nozzle and a pair of side nozzles arranged to sandwich the center nozzle, The water discharge pattern of the center nozzle is characterized by a wider water discharge width and a shorter water discharge distance than the water discharge pattern of the side nozzles.

[0011] (5) In addition, in the device described in any one of (1) to (4) above, a part of the nozzle is replaceable with a closing member that closes the communication port. [Effects of the Invention]

[0012] In this invention, multiple nozzles with different water discharge directions are provided on the head body, and instead of discharging water from all of these nozzles at once, water can be discharged by switching between the nozzles in sequence. This reduces the amount of water used per unit time in the event of a fire, making it economical. Furthermore, reducing the amount of water used allows the pump and water tank to be made smaller, thereby reducing equipment costs. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is an explanatory diagram of a water spray head according to an embodiment. [Figure 2] FIG. 2 is a diagram illustrating the water spray range of each nozzle of the water spray head of FIG. [Figure 3] FIG. 2 is a view showing the inner cylinder of the water spray head of FIG. 1 alone. [Figure 4] 2 is an explanatory diagram of a rotation mechanism that rotates the inner cylinder of the water spray head of FIG. 1. FIG. [Figure 5] 2 is a diagram for explaining the operation of the water spray head of FIG. 1 (part 1). FIG. [Figure 6]FIG. 2 is a diagram illustrating the operation of the water spray head of FIG. 1 (part 2). [Figure 7] 10A and 10B are explanatory diagrams of another aspect of the water spray head according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] FIG. 1 shows a water spray head 1 according to an embodiment of the present invention. Fig. 1(a) is a top view of the water spray head 1, Fig. 1(b) is a front view, and Fig. 1(c) is a cross-sectional view taken along the line AA in Fig. 1(b). The water spray head 1 of this embodiment includes a head body 3 that receives water from a water supply pipe, and a plurality of nozzles attached to the head body 3, as shown in FIG.

[0015] As shown in Figure 1(c), the head body 3 has a double-cylinder structure consisting of an outer cylinder 5 and an inner cylinder 7. Both the outer cylinder 5 and the inner cylinder 7 are cylindrical bodies with a top plate, and the inner cylinder 7 is rotatably provided along the inner surface of the outer cylinder 5. A water supply pipe (not shown) is connected to the underside of the head body 3, and water is supplied from the water supply pipe to the inside of the inner cylinder 7.

[0016] The multiple nozzles attached to the head body 3 consist of a center nozzle 9 and a pair of side nozzles 11a and 11b arranged on either side of the center nozzle 9. As shown in Figure 1(b), the center nozzle 9 and the side nozzles 11a and 11b each consist of two nozzles arranged above and below each other with different ranges.

[0017] Of the two upper and lower nozzles, the lower nozzle sprays water toward an area close to the water spray head 1, and the upper nozzle sprays water toward an area far from the water spray head 1. As described above, the center nozzle 9 and the side nozzles 11a and 11b each consist of two nozzles, one for close casting and one for far casting, and by spraying water in the same direction from these two nozzles, water can be sprayed evenly from the area close to the water spray head 1 to an area far away. Hereinafter, when the center nozzle 9, the side nozzle 11a, or the side nozzle 11b is mentioned, it will refer to the two nozzles for short-distance casting and long-distance casting, respectively.

[0018] The center nozzle 9 and the side nozzles 11a, 11b are each in communication with the inside of the outer cylinder 5 via communication ports 13a to 13c formed in the outer cylinder 5. Here, the communication port corresponding to the side nozzle 11a is designated by the reference symbol 13a, the communication port corresponding to the center nozzle 9 by the reference symbol 13b, and the communication port corresponding to the side nozzle 11b by the reference symbol 13c. As mentioned above, the center nozzle 9 and the side nozzles 11a, 11b each consist of two nozzles, one for short casts and one for long casts, and therefore the outer cylinder 5 is formed with two communication ports 13a to 13c on each of the top and bottom.

[0019] The water spray direction and pattern of the center nozzle 9 and side nozzles 11a and 11b are shown in Figure 2. Figure 2 is a plan view of the water spray head 1 installed in a tunnel, with the water spray range of each nozzle indicated by diagonal lines. As shown in FIG. 2, the water spray head 1 is provided on one of the opposing tunnel side walls 15, and sprays water toward the other tunnel side wall 15 and the road surface.

[0020] In the installed state shown in FIG. 2, the center nozzle 9 discharges water toward the front of the tunnel side wall 15, which is the installation surface, facing the tunnel side wall 15. In contrast, the side nozzles 11a and 11b spray water in directions offset by 45° on both sides of the horizontal direction from the front of the opposing tunnel side wall 15. In other words, the water spray head 1 of this embodiment is capable of spraying water in three directions. By providing multiple nozzles with different water spray directions, the water spray range per water spray head can be made wider than with a water spray head that only sprays water in one direction, and therefore the number of water spray heads 1 that need to be installed in one water spray section can be reduced.

[0021] Here, the direction directly in front of the opposing tunnel side wall 15 is used as the reference, and the horizontal angle of deviation from this reference is defined as the water discharge angle. In the case of the water spray head 1 in Figure 2, the water discharge angle of the center nozzle 9 is 0°, the water discharge angle of the side nozzle 11a is +45°, and the water discharge angle of the side nozzle 11b is -45°. As mentioned above, the water discharge angle is a positive (+) value when it is deviated to the left when viewed from the installation surface, and a negative (-) value when it is deviated to the right.

[0022] As the water discharge angle described above increases in the positive or negative direction, the distance from the nozzle tip to the opposing tunnel side wall 15 in that water discharge direction increases, and so the required water discharge distance also increases. Generally, the narrower the water discharge width of a nozzle, the longer the water discharge distance, and the wider the water discharge width, the shorter the water discharge distance. Therefore, it is preferable to use a nozzle with a water discharge pattern (water discharge width, water discharge distance) that is appropriate for the nozzle's water discharge angle.

[0023] In this embodiment, the center nozzle 9, which has a water discharge angle of 0°, is a nozzle with a wide water discharge width and a short water discharge distance, and the side nozzles 11a and 11b, which have a water discharge angle of +45° or -45°, are nozzles with a narrow water discharge width and a long water discharge distance. Therefore, the water discharge pattern of the center nozzle 9 has a wider water discharge width and a shorter water discharge distance than the water discharge patterns of the side nozzles 11a and 11b.

[0024] As described above, by changing the water discharge pattern according to the water discharge angle of each nozzle, it is possible to reduce unnecessary water discharge and to widen the water discharge range per water spray head 1, which is preferable.

[0025] Next, the shape of the inner cylinder 7 will be described with reference to FIG. Fig. 3(a) is a top view of the inner cylinder 7 alone, Fig. 3(b) is a front view, and Fig. 3(c) is a cross-sectional view taken along the line BB in Fig. 3(b). As shown in Figure 3, two rectangular openings 17 that are long in the axial direction of the inner tube 7 are formed in the peripheral wall of the inner tube 7, and one opening 17 is located on the circumferential opposite side of the other opening 17.

[0026] As described above, the inner cylinder 7 is rotatably provided along the inner surface of the outer cylinder 5. When the inner cylinder 7 rotates, at a certain point, one of the two openings 17 faces one of the communication ports 13a to 13c. At this time, the nozzle provided in the communication port facing the opening 17 is in communication with the inside of the inner cylinder 7. On the other hand, the other communication ports not facing the opening 17 are blocked by the peripheral wall of the inner cylinder 7. For example, in FIG. 1(c), the opening 17 is located opposite the communication port 13b, so only the center nozzle 9 is in communication with the inside of the inner cylinder .

[0027] The width of opening 17 (short side of the rectangle) is set to be the same as or slightly larger than the diameter of communication ports 13a to 13c so that when opening 17 faces one of communication ports 13a to 13c, the other communication port is blocked. In addition, the vertical length of the opening 17 (the long side of the rectangle) is set to a length that spans the two communication ports arranged vertically (the communication port where the long-distance casting nozzle is provided and the communication port where the short-distance casting nozzle is provided).

[0028] In the present invention, the method for rotating the inner cylinder 7 is not particularly limited, but for example, a rotation mechanism 19 as shown in FIG. 4 can be used. FIG. 4 is a diagram showing the internal structure of the head main body 3 in which the rotation mechanism 19 is provided. 4, the rotation mechanism 19 includes an actuator 21 provided on the top of the outer tube 5, a rotation drive unit 23 provided inside the actuator 21, and a shaft 25 connecting the rotation drive unit 23 to the inner tube 7. The shaft 25 passes through the top plate of the outer tube 5, with its upper end connected to the rotation drive unit 23 and its lower end connected to the top plate of the inner tube 7.

[0029] When the actuator 21 rotates the rotary drive unit 23, the inner cylinder 7 connected to the rotary drive unit 23 rotates inside the outer cylinder 5. By using such a rotation mechanism 19, the inner cylinder 7 can be rotated at a predetermined speed by electric control. In this embodiment, the rotation mechanism 19 rotates the inner cylinder 7 clockwise when viewed from above.

[0030] As the inner cylinder 7 rotates, the position of the opening 17 moves circumferentially, and the communication port that communicates with the inside of the inner cylinder 7 is switched sequentially. This causes the nozzles through which water is supplied from the head body 3 to be switched sequentially, and the direction of water discharge from the water spray head 1 can be switched sequentially.

[0031] Next, the operation of the water spray head 1 of this embodiment configured as described above will be described with reference to FIGS. When a fire breaks out inside the tunnel, water is supplied to the inside of the inner cylinder 7 from a water supply pipe (not shown) connected to the bottom of the head body 3. Also, the actuator 21 (see Figure 4) installed on the top of the head body 3 is activated, and the inner cylinder 7 begins to rotate.

[0032] As the inner cylinder 7 rotates, the two openings 17 move circumferentially, and at a certain point, one of the two openings 17 faces the communication port 13a of the outer cylinder 5, as shown in Figure 5(a). At this time, the side nozzle 11a provided in the communication port 13a communicates with the inside of the inner cylinder 7, and water inside the inner cylinder 7 flows into the side nozzle 11a. On the other hand, the other communication ports 13b and 13c are blocked by the peripheral wall of the inner cylinder 7, so water does not flow into the center nozzle 9 and the side nozzle 11b. Therefore, when the water spray head 1 is in the state shown in FIG. 5(a), water is emitted only from the side nozzles 11a as shown in FIG. 6(a), and water is sprayed in the shaded area in the figure.

[0033] 5(a), the opening 17 moves to a position facing the communication port 13b of the outer cylinder 5, as shown in FIG. 5(b). At this time, the center nozzle 9 provided in the communication port 13b communicates with the inside of the inner cylinder, and water in the inner cylinder 7 flows into the center nozzle 9. On the other hand, the other communication ports 13a and 13c are blocked by the peripheral wall of the inner cylinder 7, so water does not flow into the side nozzles 11a and 11b. Therefore, when the water spray head 1 is in the state shown in FIG. 5(b), water is emitted only from the center nozzle 9 as shown in FIG. 6(b), and water is sprayed in the shaded area in the figure.

[0034] When the inner cylinder 7 rotates further from the state shown in Figure 5(b), the opening 17 moves to a position facing the communication port 13c of the outer cylinder 5, as shown in Figure 5(c). At this time, the side nozzle 11b provided in the communication port 13c communicates with the inside of the inner cylinder 7, and water inside the inner cylinder 7 flows into the side nozzle 11b. On the other hand, the other communication ports 13a and 13b are blocked by the peripheral wall of the inner cylinder 7, so water does not flow into the center nozzle 9 and the side nozzle 11a. Therefore, when the water spray head 1 is in the state shown in FIG. 5(c), water is emitted only from the side nozzle 11b as shown in FIG. 6(c), and water is sprayed in the shaded area in the figure.

[0035] When the inner cylinder 7 rotates further from the state shown in Figure 5(c), the opening 17 on the circumferential opposite side of the opening 17 that opened the communication ports 13a to 13c moves to a position facing the communication port 13a of the outer cylinder 5, returning to the same state as in Figure 5(a). The subsequent movement is the same as above, and the water discharge shown in Figures 6(a) to 6(c) is repeated.

[0036] In this way, one opening 17 is provided on the circumferentially opposite side of the other opening 17, so that water is discharged once each from the center nozzle 9 and the side nozzles 11a and 11b every time the inner cylinder 7 makes a half rotation. The number of openings 17 formed in the inner cylinder 7 is not limited to two, and may be one, three or more. However, when the number of openings 17 is one, water does not discharge until the opening 17 moves from the position in Figure 5(c) to the position in Figure 5(a), so in consideration of water discharge efficiency, it is preferable that the number of openings 17 is two or more.

[0037] As described above, the communication ports to be opened can be switched sequentially by rotating the inner cylinder 7 having the openings 17 inside the outer cylinder 5, and this allows the water discharge direction to be switched sequentially. By switching the nozzles that discharge water sequentially in this way, the amount of water discharged per unit time can be reduced compared to when water is discharged from all the nozzles at the same time, which is more economical. Therefore, by using the water spray head 1 of this embodiment instead of a water spray head that sprays water in one direction as in the conventional example, the number of water spray heads installed in one water spray section can be reduced compared to the conventional example, and the amount of water sprayed can also be reduced. Furthermore, by reducing the amount of water discharged, the pump and water tank for supplying water to the water spray head 1 can be made smaller, which also reduces equipment costs.

[0038] As described above, the water spray head 1 of this embodiment is equipped with a center nozzle 9 and a pair of side nozzles 11a, 11b arranged on either side of the center nozzle 9, but some of these nozzles may be replaceable with closing members that close any of the communication ports 13a to 13c.

[0039] For example, if the water spray heads 1 of this embodiment are arranged at a predetermined interval in the tunnel axial direction, the water spray head 1 arranged near the tunnel exit may not need to spray water from the side nozzles 11a, 11b on the exit side. If the side nozzle 11a is located at the tunnel exit and water discharge from the side nozzle 11a is not required, it is advisable to replace the side nozzle 11a with a closing member. By providing a closing member instead of the side nozzle 11a, the communication opening 13a is always closed by the closing member, so even if the opening 17 is in the position shown in Figure 5(a), the water discharge shown in Figure 6(a) will not occur. In this case, the water discharges shown in Figure 6(b) and Figure 6(c) are repeated alternately, which is preferable as it prevents unnecessary water discharge.

[0040] Although this embodiment shows an example of spraying water in three directions, the present invention can be applied to a nozzle that sprays water in two or four or more directions as long as it combines multiple nozzles with different water spray directions.

[0041] In addition, in this embodiment, the center nozzle 9 and the side nozzles 11a, 11b are each composed of two nozzles, one for short throw and one for long throw, but this does not limit the present invention. For example, the center nozzle 9 and the side nozzles 11a, 11b may be composed of three nozzles with different ranges (from the bottom, for short throw, long throw, and super long throw), as in the water spray head 27 shown in Figure 7, and the present invention can also be applied in this case.

[0042] Furthermore, the inner tube 7 in this embodiment corresponds to the opening and closing mechanism of the present invention, but the opening and closing mechanism of the present invention need only be capable of opening some communication ports while closing other communication ports and of switching the communication ports to be opened, and the form is not limited thereto. For example, in the water spray head 1 of this embodiment, instead of providing an inner tube 7, an electric valve may be provided in each of the communication ports 13a to 13c, and the communication ports to be opened may be switched sequentially by opening and closing each electric valve. [Explanation of symbols]

[0043] 1 water spray head 3 Head body 5 outer cylinder 7 Inner cylinder 9 Center nozzle 11a, 11b Side nozzle 13a~13c communication port 15 Tunnel side wall 17 Opening 19 Rotation mechanism 21 Actuator 23 Rotation drive unit 25 shaft 27 Water spray head (other aspects)

Claims

1. A water spray head comprising a head body that receives water from a water supply pipe and a plurality of nozzles that are attached to the head body and have different water spray directions, the plurality of nozzles communicate with the head body via communication ports formed in the head body; This water spray head is characterized by having an opening / closing mechanism that can open some of the communication ports while closing the other communication ports, and the water discharge direction is sequentially switched by sequentially switching the communication ports that the opening / closing mechanism opens.

2. A water spray head comprising a head body that receives water from a water supply pipe and a plurality of nozzles that are attached to the head body and have different water spray directions, The head body has an outer cylinder and an inner cylinder that is rotatable at a predetermined speed along the inner surface of the outer cylinder, the plurality of nozzles are provided to communicate with the inside of the outer cylinder through communication ports formed in the outer cylinder, The water spray head is characterized in that the inner cylinder has an opening that can open the other communication ports while blocking some of the communication ports, and the communication ports that are opened are sequentially switched as the inner cylinder rotates, thereby sequentially switching the water discharge direction.

3. 3. The water spray head according to claim 1, wherein the plurality of nozzles have different water discharge patterns depending on the water discharge angle.

4. The plurality of nozzles It consists of a center nozzle and a pair of side nozzles arranged to sandwich the center nozzle, 4. The water spray head according to claim 3, wherein the water discharge pattern of the center nozzle has a wider water discharge width and a shorter water discharge distance than the water discharge patterns of the side nozzles.

5. 5. The water spray head according to claim 1, wherein a part of the nozzle is replaceable with a closing member that closes the communication port.

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