JP5852205B2 - Long throw water spray nozzle - Google Patents

Description

  The present invention relates to a water spray nozzle for fire extinguishing equipment installed on a wall surface of a tunnel through which a vehicle passes, and more particularly to a dustproof structure for a water spray nozzle.

  Conventionally, for example, as a fire extinguishing equipment for a tunnel, a water spray head including a long throw nozzle and a near throw nozzle is used (see, for example, Patent Documents 1 and 2).

  Dust is generated in the tunnel, but if this dust accumulates on the water outlet of the water spray nozzle, a water discharge failure occurs, and the water cannot be discharged into the water discharge section as designed. In order to prevent the accumulation of dust, a cap-shaped dustproof cover is attached to the water outlet of the water spray nozzle. This dustproof cover is pushed and removed by the pressure when water for fire extinguishing is pumped to the water spray nozzle at the time of water discharge check or actual fire.

JP 2004-105312 A JP 2004-121944 A

  As described above, the conventional dustproof cover is automatically removed from the water spray nozzle by the pressure of fire-extinguishing water, but is not configured to automatically return to the original state when the water discharge is stopped. Therefore, after the water discharge is stopped, the dust cover is attached to the water spray nozzle by an operator's hand to return to the original state. In general, a large number of water spray nozzles are installed in tunnels, and they are installed at high places where they cannot be reached. Therefore, it is time consuming and labor intensive to install the dust cover manually. There is also. In addition, although there is no legal obligation, this inspection work is performed relatively frequently. For example, it is performed twice a year, and the longer it takes to install the dust cover, the higher the maintenance cost. Become.

  In view of the above circumstances, an object of the present invention is to easily return the dust cover to the original state.

Long shot water spray nozzle of the present invention, the water discharge head fire extinguishing equipment which is arranged to tunnel walls, together with the near-throw water spray nozzle disposed in a vertical direction, long cast water spray nozzle disposed in a horizontal direction , A long-throw nozzle body having a rectangular nozzle water outlet formed at the inside of the tip, and a front end of the nozzle body , the lower end of which is pivotally supported on the lower side of the nozzle body. A displaceable sealing member that seals the nozzle water outlet from only its front surface and is larger than the front outer diameter of the front end of the nozzle body where the nozzle water outlet is formed. A rectangular plate-shaped sealing member, and an urging means that is provided on a shaft portion that pivotally supports the sealing member and presses the sealing member against the nozzle water discharge port, and the sealing member is usually When the nozzle outlet is closed by pressure welding, The nozzle without preventing water discharge failure due to the product and dust deposits, at the time of water discharge, fire extinguishing water displaced toward the lower side by the discharge pressure is opened so as to impinge on the upper end, it affects the maximum landing distance The water discharge port is opened, and when the water discharge is stopped, the nozzle water discharge port is automatically closed by returning to the original position by the urging force of the urging means.

  In the nozzle body of the present invention, a rectangular flange is formed on the outer side of the tip, and an attachment member is attached to the flange so as to surround the nozzle outlet, and the attachment member is the sealing member The urging means is provided so that it can be retrofitted to an existing water spray nozzle.

  The attachment member according to the present invention includes a first attachment member that sandwiches an upper portion of the flange portion, and a second attachment member that sandwiches a lower portion of the flange portion.

In the present invention, at the time of water discharge, the nozzle discharge port is opened so that the sealing member is displaced downward by the water discharge pressure so that the fire-extinguishing water collides with the upper end portion, so that the longest landing distance is affected. There is nothing. In addition, an urging unit that presses the sealing member against the nozzle water discharge port is provided, and when the water discharge is stopped, the sealing member returns to the original position and closes the nozzle water discharge port by the urging force of the urging unit. When the water discharge is stopped, the nozzle water outlet can be automatically closed. Therefore, unlike conventional models, it is no longer necessary to manually install the dust proof cover, which reduces the time required for inspection work, reduces costs, and avoids work at high places, improving safety. Can be achieved.

  In the nozzle body of the present invention, a rectangular flange is formed on the outer side of the tip, and an attachment member surrounding the nozzle outlet is attached to the flange, and the attachment member includes the sealing member and the sealing member. Since the urging means is provided, it can be retrofitted to an existing water spray nozzle. In addition, the attachment member of the present invention includes the first attachment member that sandwiches the upper part of the collar part and the second attachment member that sandwiches the lower part of the collar part, so that the existing water spray The attachment member can be easily fixed to the nozzle.

It is a front view which shows 1st Embodiment of this invention. It is a longitudinal cross-sectional view at the time of water discharge stop of the water spray nozzle for near throwing. It is a longitudinal cross-sectional view in the water discharge of a near throwing water spray nozzle. It is a longitudinal cross-sectional view at the time of the water discharge stop of the long spray water spray nozzle. It is a figure in the water discharge of a long-spray water spray nozzle, and is a figure showing a water discharge pattern. It is a longitudinal cross-sectional view which shows 2nd Embodiment of this invention, and is a figure corresponding to FIG. It is a front view of the water spray nozzle for long throws which shows 3rd Embodiment of this invention, and is a figure corresponding to FIG. It is a longitudinal cross-sectional view in the water discharge of the long spray water spray nozzle. It is a front view which shows 4th Embodiment of this invention, and is a figure corresponding to FIG. It is a schematic longitudinal cross-sectional view of FIG. 9, and is a longitudinal cross-sectional view at the time of the water discharge stop of the long spray water spray nozzle. It is a longitudinal cross-sectional view in the water discharge of the long spray water spray nozzle.

  A first embodiment of the present invention will be described with reference to FIGS. On the wall surface (not shown) of the tunnel through which the vehicle passes, a water discharge head 1 of fire extinguishing equipment is disposed. The water discharge head 1 includes a near-water spray nozzle (hereinafter referred to as “close-throw nozzle”) 3 disposed in the vertical direction and a long-water spray nozzle (hereinafter referred to as “far-throw”) disposed in the horizontal direction. 5).

  The near throwing nozzle 3 is communicated with the head main body 9 via the head connecting cylinder 7. The near throwing nozzle 3 includes a cylindrical outer cylinder 11 and an inner cylinder 15 inserted into the outer cylinder 11 and having an annular flange 13 on the outer side of the tip 15a. An annular first nozzle water discharge port 16 is formed between the tube 11.

  A guide flange portion 17 is provided at the rear end portion of the inner cylinder 15, and the guide flange portion 17 is slidably in contact with the inner peripheral surface of the first step portion 11 a of the outer cylinder 11. The first step portion 11a is continuous with the second step portion 11b, and a biasing member 19 such as a coil spring is stretched between the second step portion 11b and the guide flange portion 17, Both 11b and 17 are urged | biased in the direction which leaves | separates. Therefore, since the annular flange 13 of the inner cylinder 15 is pressed against the outer cylinder 11, the first nozzle outlet 16 is closed. On the guide flange portion 17 side of the inner cylinder 15, a plurality of communication holes 18 communicating with the first nozzle outlet 16 are provided at predetermined intervals.

  A nozzle mounting member 21 having a second nozzle water discharge port 20 is screwed to the front end 15 a side of the inner cylinder 15, and the annular flange 13 is provided at the front end of the nozzle mounting member 21. A connecting rod 27 that connects the support ring 23 and the sealing member 25 is concentrically disposed in the inner cylinder 15. The support ring 23 is provided with a plurality of water passage openings in an annular shape inside. The support ring 23 holds the sealing member 25 on the front side of the second nozzle outlet.

  The sealing member 25 is formed in the shape of a deflector that disperses water for fire extinguishing, and includes a flat plate portion 25a and a bent portion 25b, and the bent portion 25b is provided with a plurality of cutout portions 25c. A bulging portion 29 is provided on the sealing rod 25 side of the connecting rod 27. The bulging portion 29 is formed, for example, in the shape of a cone, and the first nozzle outlet is used during fire monitoring. Although it is within 20, when water is discharged, it protrudes from the nozzle water outlet 20 and functions as a cone. In other words, the flow of water is changed in an oblique direction.

  An urging member 31 such as a coil spring is stretched between the nozzle mounting member 21 and the support ring 23, and the both 21 and 23 are urged away from each other. Therefore, since the sealing member 25 is pressed against the second nozzle outlet 20, the nozzle outlet 20 is closed.

  The long throw nozzle 5 is provided in a direction orthogonal to the near throw nozzle 3. The long throw nozzle 5 includes a nozzle main body 35 screwed to the head main body 9 and an attachment member 37 attached to the nozzle main body 35. A rectangular flange 39 is provided outside the tip of the nozzle body 35, and a rectangular nozzle water discharge port 40 is provided inside the flange 39.

  The attachment member 37 includes a first attachment 37b that holds the upper portion of the flange portion 39 and a second attachment 37a that holds the lower portion of the flange portion 39. The attachment members 37a and 37b are attached to the flange 39 so as to surround the nozzle outlet 40, and then tightened with a bolt or the like to be integrated. The attachment member 37 includes a sealing member 41 that is pivotally supported and a biasing member 43 such as a coil spring that biases the sealing member 41 toward the nozzle outlet 40. .

Next, the operation of this embodiment will be described.
"Normal time (when monitoring fire)"
As shown in FIG. 2, the first nozzle water discharge port 16 of the near throwing nozzle 3 of the water discharge head 1 is closed by the pressure contact of the annular flange 13, and the second nozzle water discharge port 20 is connected to the sealing member 25. The nozzle water discharge port 40 of the long throw nozzle 5 is closed by the pressure contact of the sealing member 41 as shown in FIG. Therefore, there is no possibility that dust accumulates in the nozzle outlets 16, 20, and 40.

"During inspection work or actual fire"
When a pump (not shown) is activated and fire extinguishing water is pumped to the water discharge head 1, the fire extinguishing water flows into the near throwing nozzle 3 and the far throwing nozzle 5.

  The fire-extinguishing water W that has flowed into the near throwing nozzle 3 goes straight in the inner cylinder 15 toward the second nozzle outlet 20, and a part thereof passes through the communication hole 18 and the first nozzle outlet 16. Therefore, the fire-extinguishing water W presses the nozzle mounting member 21, the bulging portion 29 and the sealing member 25, and presses the annular flange 13. Therefore, the annular flange 13 and the sealing member 25 that have been urged by the urging members 19 and 31 move under water pressure, so that the nozzle water discharge ports 16 and 20 are opened, and fire-extinguishing water W is discharged. The

  The fire-extinguishing water W discharged from the first nozzle outlet 16 of the near throw nozzle 3 collides with the annular flange 13 and is discharged while changing the flow direction, and from the second nozzle outlet 20. The fire extinguishing water W is discharged while being guided by the sealing member 25 after colliding with the bulging portion 29 that acts as a cone and changes the direction of the water flow to an oblique direction. At this time, since the sealing member 25 is formed in a shape that can function as a deflector, a desired water discharge pattern can be obtained.

  Further, the fire-extinguishing water W that has flowed into the long-throw nozzle 5 goes straight through the nozzle body 35 toward the nozzle water outlet 40, so that the fire-extinguishing water W presses the sealing member 41. Therefore, the sealing member 41 that has been urged by the urging member 43 is rotated by receiving water pressure, so that the nozzle outlet 40 is opened and the fire-extinguishing water W is discharged. The fire-extinguishing water W discharged from the nozzle water outlet 40 of the long throw nozzle is, for example, discharged in a water discharge pattern P shown in FIG. 5. In this long throw nozzle 5, the sealing member 41 is discharged from the nozzle. Since it is pivotally supported on the upper side of the water port 40, a part (upper side) of the fire-extinguishing water collides with the lower end portion of the opened sealing member 41, and its discharge direction is restricted. Therefore, the shortest landing distance (length from the long throw nozzle 5 to the nearest point) Pa of the water discharge pattern P is the same as that when the sealing member 41 is not attached, but the longest landing distance (long throw nozzle). The length Pb from the point farthest from 5) Pb is shorter than when the sealing member 41 is not attached.

"After inspection work or during recovery work"
When the pump is stopped and the water supply to the water discharge head 1 is stopped, the water discharge is completed and the inner cylinder 15 and the sealing member 25 are slid by the spring force of the urging members 19 and 31 to return to the original state. (See FIG. 2). Therefore, the annular flange 13 and the sealing member 25 are pressed against the nozzle water discharge ports 16 and 20, so that the nozzle water discharge ports 16 and 20 are reliably closed. In the long throw nozzle 5, when the water discharge is completed, the sealing member 41 is rotated by the spring force of the urging member 43 to return to the original state (see FIG. 4). Therefore, since the sealing member 41 is pressed against the nozzle water outlet 40, the nozzle water outlet 40 is reliably closed.

  A second embodiment of the present invention will be described with reference to FIG. 6. The same reference numerals as those in FIGS. 1 to 5 have the same names and functions. The difference between this embodiment and the first embodiment is that instead of pivotally supporting the sealing member 41 on the upper side of the nozzle water outlet 40, it is pivotally supported on the lower side and rotated from the upper side to the lower side. It is that.

  In this embodiment, the fire-extinguishing water W discharged from the second nozzle water outlet 40 of the long throw nozzle 5 is discharged, for example, with a water discharge pattern P1 shown in FIG. In this water discharge pattern P1, since the sealing member 41 is pivotally supported on the lower side of the nozzle water outlet 40, a part (lower side) of fire-extinguishing water collides with the upper end portion of the opened sealing member 41. However, the discharge direction is regulated. Therefore, the shortest landing distance Pa of the water discharge pattern P1 is shorter than that of the first embodiment, and the longest landing distance Pb is longer than that of the first embodiment, and the sealing member 41 is not provided. Is the same as

A third embodiment of the present invention will be described with reference to FIGS. 7 to 8. The same reference numerals as those in FIGS. 1 to 6 have the same names and functions. The main differences between this embodiment and the first embodiment are as follows.
(1) The sealing member 41 of the long throw nozzle 5 is a substantially L-shaped member composed of a sealing portion 41a and an arm portion 41b, and the nozzle outlet 40 is closed by the sealing portion 41a. The rear end portion of the arm portion 41b is pivotally fixed to the rear end portion of the nozzle body 35 so as to be rotatable.

(2) The plug portion 44 is projected from the inner surface of the arm portion 41b, and the outer peripheral surface of the nozzle body 35 and the inner surface of the arm portion 41b are separated from each other.
(3) A communication hole 42 that is closed by the plug portion 44 is provided in the body portion of the nozzle body 35. The central axis of the communication hole 42 is inclined obliquely upward with respect to the axis of the nozzle body 35, and the inclination angle is appropriately selected as necessary.

(4) The biasing member 43 such as a spring biases the sealing member 41 in the closing direction of the nozzle water outlet 40 and the communication hole 42.

  In this embodiment, when fire-extinguishing water W is supplied to the nozzle body 35, the sealing portion 41 a is pressed, and a part of the sealing body 41 passes through the communication hole 42 and collides with the plug portion 44. Therefore, the sealing portion 41a of the sealing member 41 is separated from the nozzle water discharge port 40, water discharge is started, and the arm portion 41b is pushed up by the fire-extinguishing water passing through the communication hole 42, so that the tip of the sealing portion 41a The part is maintained at a position above the nozzle outlet 40. The position of the sealing portion 41a is maintained throughout the water discharge, and the open state of the nozzle water discharge port 40 is maintained. Therefore, this mechanism can also be called an opening degree holding mechanism. In the open state, since the holding opening is set so that the sealing member 41 does not limit the water discharge pattern, a water discharge pattern as designed can be obtained.

  When the supply of the fire-extinguishing water W to the nozzle body 35 is stopped, the urging force of the urging member 43 causes the sealing portion 41a to press-close the nozzle water discharge port 40, and the plug portion 44 press-closes the communication hole 42. In the present embodiment, the arm portion 41b of the sealing member 41 is disposed on the upper side of the nozzle body 35, but it is needless to say that the communication hole may be provided on the lower side.

  A fourth embodiment of the present invention will be described with reference to FIGS. 9 to 11. The same reference numerals as those in FIGS. 1 to 8 have the same names and functions. The difference between this embodiment and the first embodiment is that the sealing member 41 is opened by a piston instead of being opened by the water pressure of the fire extinguishing water W.

  That is, a cylinder portion 45 is provided on the opposite side of the long throw nozzle 5 in the water discharge head 1, a piston 47 is fitted into the cylinder portion 45, and a piston rod 49 that penetrates the cylinder portion 45 through the piston 47 is provided. Are connected. An urging member 50 such as a coil spring that urges the piston 47 toward the long throw nozzle 5 is provided on the outer periphery of the piston rod 49 in the cylinder portion 45.

  A support rod 51 is erected on the rear end portion of the piston rod 49, that is, a portion exposed from the cylinder portion 45, and one end of a connecting member 53 such as a wire or a rope is attached to the distal end portion of the support rod 51. The other end is connected to the connecting portion 55 of the sealing member 41. The length of the connecting member 53 is adjusted to a length at which the sealing member 41 can be pulled to a position where the sealing member 41 does not contact the water discharge pattern at the time of water discharge, for example, obliquely above the nozzle water outlet 40. The movement of the connecting member 53 is restricted by being inserted through a guide protrusion 57 provided on the top of the head body 9.

The operation of the long throw nozzle 5 of this embodiment will be described.
"Normal time (when monitoring fire)"
As shown in FIGS. 9 and 10, the nozzle water outlet 40 of the long throw nozzle 5 is sealed by the pressure contact of the sealing member 41. Therefore, there is no possibility that dust will accumulate in the nozzle outlet 40.

"During inspection work or actual fire"
When a pump (not shown) is activated and the fire-extinguishing water W is pumped to the water discharge head 1, the fire-extinguishing water W flows into the long throw nozzle 5. Then, the piston 47 in the head body 9 is pressed by the fire-extinguishing water W and slides, so that the piston rod 49 slides in the opposite direction to the long throw nozzle 5. Therefore, since the sealing member 41 is pressed by the water discharge pressure and simultaneously pulled by the connecting member 53, it rotates in the direction of the arrow A41, so that the nozzle water discharge port 40 is opened and water discharge is started (see FIG. 11). ).

  At this time, the sealing member 41 rotates, for example, 130 degrees or more and is located obliquely above the nozzle outlet 40, but the sealing member 41 maintains its open state while water is discharged. Therefore, this mechanism can also be called an opening degree holding mechanism. In the open state, the sealing member 41 does not limit the water discharge pattern. Therefore, since the water is discharged in the same state as the state where the sealing member 41 is not provided, a designed water discharge pattern can be obtained.

"After inspection work or during recovery work"
When the pump is stopped and the water supply to the water discharge head 1 is stopped, the water discharge ends and the piston 47 slides in the cylinder portion 45 by the urging force of the urging member 50 to return to the original state (FIG. 10). reference). Therefore, since the sealing member 41 is pressed against the nozzle water outlet 40, the nozzle water outlet 40 is reliably closed.

Embodiment of this invention is not limited above, For example, you may make it support the sealing member in 4th Embodiment on the lower side instead of supporting it on the upper side of a water discharge head. In this case, the guide protrusion is provided on the lower side of the water discharge head, and the connecting member is also stretched through the lower side.
The long throw nozzle in the first, second, and fourth embodiments is a separate configuration in which the biasing member and the sealing member are attached via an attachment member, and the third embodiment The long throw nozzle in the embodiment is configured such that the urging member and the sealing member are integrally provided without using the attachment member, but the long throw nozzle in any of the embodiments is configured integrally or separately. can do.

DESCRIPTION OF SYMBOLS 1 Water discharge head 3 Near throw water spray nozzle 5 Long throw water spray nozzle 9 Nozzle main body 11 Outer tube 13 Annular collar 15 Inner tube 16 First nozzle water discharge port 18 Communication hole 19 Energizing member 20 Second nozzle water discharge port 25 Sealing member 31 Energizing member 35 Nozzle body 37 Attachment member 40 Nozzle outlet 41 Sealing member 43 Energizing member 45 Cylinder portion 47 Piston 50 Energizing member

Claims (3)

In the water spray head of the fire extinguishing equipment disposed on the tunnel wall surface, with the near water spray nozzle disposed in the vertical direction, the long water spray nozzle disposed in the horizontal direction,
A long throw nozzle body in which a rectangular nozzle water outlet is formed inside the tip;
A sealing member that is provided on the front surface of the nozzle body and is displaceable by being pivotally supported at a lower end thereof so as to be rotatable on the lower side of the nozzle body , and press-contacting the nozzle outlet from only the front surface thereof A rectangular plate-shaped sealing member that is sealed and larger than the front outer diameter of the front end of the nozzle body where the nozzle outlet is formed,
An urging means that is provided on a shaft portion that pivotally supports the sealing member, and that presses the sealing member against the nozzle outlet;
With
The sealing member normally closes the nozzle outlet by pressure contact to prevent dust accumulation and water discharge failure due to the dust accumulation,
At the time of water discharge, a part of water for fire extinguishing that is displaced downward and discharged by water discharge pressure is opened so as to collide with the upper end, and the nozzle water discharge port is opened without affecting the longest landing distance ,
During water discharge stop, long cast water spray nozzle, wherein said nozzle outlets back to the original position by the urging force of the urging means has to be automatically closed. The nozzle body is formed with a rectangular flange on the outer end of the tip, and an attachment member is attached to the flange so as to surround the nozzle outlet, and the attachment member includes the sealing member and the attachment. 2. The long throw water spray nozzle according to claim 1, further comprising an urging means, which can be retrofitted to an existing water spray nozzle . 3. The remote attachment according to claim 2, wherein the attachment member includes a first attachment member that sandwiches an upper portion of the flange portion, and a second attachment member that sandwiches a lower portion of the flange portion. Water spray nozzle .

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