JP5503482B2 - 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. But there is. 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.

  Therefore, there is a demand for a water spray nozzle that can automatically close the nozzle outlet when the water discharge is stopped without any human intervention. At this time, a structure that can also discharge the residual water generated by the water discharge is desired. It is.

  In view of the above circumstances, an object of the present invention is to easily return the dustproof cover to the original state and to discharge residual water generated inside.

The present invention includes a cylindrical outer cylinder and an inner cylinder that is attached to the outer cylinder and has an annular flange on the outer side of the tip, and an annular first nozzle release between the inner cylinder and the outer cylinder. In the water spray nozzle in which the water port is formed and the second nozzle water discharge port is formed inside the front end of the inner cylinder, the inner cylinder is urged toward the rear end side, and the first nozzle is released by the annular flange. A first urging means for closing the water port, a sealing member provided on the front surface of the second nozzle outlet, a holding member provided inside the inner cylinder and holding the sealing member, A second biasing means provided between an inner cylinder and a holding member of the sealing member, biasing the sealing member toward the holding member, and closing a second nozzle outlet; A communication hole that is provided in the inner cylinder and communicates with the first nozzle water outlet and the second nozzle water outlet. The first nozzle water discharge port and the second nozzle water discharge port are opened along with the forward movement of the inner cylinder and the sealing member due to water discharge pressure, and when the water discharge is stopped, the biasing force of the biasing means The first nozzle water outlet and the second nozzle water outlet are closed as the inner cylinder and the sealing member move backward .

Further, the sealing member of the second nozzle outlet is a deflector .

Further, according to the present invention, a first drainage groove for draining residual water generated in the water spray nozzle from the first nozzle outlet is formed on a contact surface between the outer cylinder and the annular flange. The second drainage groove for draining the residual water generated in the water spray nozzle from the second nozzle outlet is formed on the contact surface between the inner cylinder and the sealing member. .
Further, the present invention provides a nozzle water discharge port formed inside the tip, and is rotatably supported by a shaft portion having a biasing means for always closing the nozzle water discharge port. The near-water spray nozzle having a sealing member that opens the nozzle outlet is communicated with the head body screwed in the horizontal direction as a near-water spray nozzle through the head coupling cylinder in the vertical direction. And a water discharge head is formed .

  The water spray nozzle of the present invention comprises a cylindrical outer cylinder and an inner cylinder that is attached to the outer cylinder and has an annular flange on the outer side of the tip, and an annular first cylinder is provided between the inner cylinder and the outer cylinder. In the water spray nozzle in which the first nozzle water discharge port is formed and the second nozzle water discharge port is formed inside the front end of the inner cylinder, the inner cylinder is urged toward the rear end side, and the annular collar portion A first urging means for closing one nozzle outlet, a sealing member provided on the front surface of the second nozzle outlet, and a holder provided inside the inner cylinder for holding the sealing member A second urging member provided between the member, the inner cylinder and the holding member of the sealing member, for urging the sealing member toward the holding member and closing the second nozzle outlet. Means, and a communication hole provided in the inner cylinder, for communicating the first nozzle water outlet and the second nozzle water outlet, The first nozzle water outlet and the second nozzle water outlet are opened along with the forward movement of the inner cylinder and the sealing member due to water discharge pressure at the time of water discharge, and when the water discharge is stopped, the biasing means is attached. Since the first nozzle water outlet and the second nozzle water outlet are closed as the inner cylinder and the sealing member are moved backward by the force, the nozzle water outlet is automatically opened when water discharge is stopped. Can be 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. Furthermore, a first drainage groove for draining residual water generated in the water spray nozzle from a first nozzle outlet is formed on a contact surface between the outer cylinder and the annular flange, and the inner cylinder Since the second drainage groove for draining the residual water generated in the water spray nozzle from the second nozzle outlet is formed on the contact surface by the sealing member and the sealing member. Residual water can also be discharged, and it is possible to prevent the water from being discharged due to freezing.

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. It is a figure which shows 5th Embodiment of this invention, Fig.12 (a) is a longitudinal cross-sectional view of an outer cylinder, FIG.12 (b) is a front view of an outer cylinder. It is a figure which shows 5th Embodiment of this invention, Fig.13 (a) is a longitudinal cross-sectional view of a nozzle attachment member, FIG.13 (b) is a front view of a nozzle attachment member.

  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, as a near throwing nozzle body 10, a cylindrical outer cylinder 11, an inner cylinder 15 inserted into the outer cylinder 11, and having an annular flange 13 on the outer side of the tip 15 a, An annular first nozzle outlet 16 is formed between the inner cylinder 15 and the outer cylinder 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. Thus, the annular collar 13 acts as a sealing member.

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 (for long throw) 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 second nozzle outlet 40 of the long throw nozzle is, for example, discharged in the water discharge pattern P shown in FIG. 5. In the long throw nozzle 5, the sealing member 41 is used. Is pivotally supported on the upper side of the nozzle outlet 40, so that a part (upper side) of the fire-extinguishing water collides with the lower end 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 outlets 16 and 20, so that the nozzle water outlet 16.20 is 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.

  As described above, the water spray nozzle 3 of the present invention includes the cylindrical outer cylinder 11 and the inner cylinder 15 attached to the outer cylinder 11 and having the annular flange 13 on the outer side of the tip. In the water spray nozzle 3 in which an annular first nozzle water discharge port 16 is formed between the outer cylinder 11 and the outer tube 11, and a second nozzle water discharge port 20 is formed inside the tip of the inner tube 15, at the time of water discharge The first nozzle water discharge port 16 is opened as the inner cylinder 15 moves forward, and the first nozzle water discharge port 16 is closed as the inner cylinder 15 moves backward when the water discharge is stopped. A sealing member 25 is provided on the front surface of the water outlet opening / closing mechanism and the second nozzle water outlet 20, and the second nozzle water outlet 20 is opened along with the forward movement of the sealing member 25 at the time of water discharge. When the sealing member 25 moves backward during the stop, the second nozzle water discharge A second nozzle outlets closing mechanism for closing the 20, is provided with the, at the time of water discharge stop, it is possible to automatically close the nozzle outlets 16 and 20. 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.

  The water spray nozzle 3 of the present invention includes a cylindrical outer cylinder 11 and an inner cylinder 15 that is attached to the outer cylinder 11 and has an annular flange 13 on the outer end of the tip. The inner cylinder 15 and the outer cylinder 11 In the water spray nozzle 3 in which the annular first nozzle water discharge port 16 is formed between the inner tube 15 and the second nozzle water discharge port 20 is formed inside the front end of the inner tube 15, the inner tube 15 is connected to the rear end side. And a biasing member 19 as a first biasing means for closing the first nozzle water discharge port 16 with the annular flange 13 and a front surface of the second nozzle water discharge port 20. Between the sealing member 25, a support ring 23 provided inside the inner cylinder 15 and holding the sealing member 25, and between the inner cylinder 15 and the holding member 23 of the sealing member 25 A second nozzle provided to urge the sealing member 25 toward the holding member 23; An urging member 31 as a second urging means for closing the water port 20 and a communication hole provided in the inner cylinder 15 for communicating the first nozzle water outlet 16 and the second nozzle water outlet 20. 18, the first nozzle water discharge port 16 and the second nozzle water discharge port 20 are opened along with the forward movement of the inner cylinder 15 and the sealing member 25 due to the water discharge pressure, and the water discharge is stopped. Sometimes, the first nozzle water discharge port 16 and the second nozzle water discharge port 20 are closed as the inner cylinder 15 and the sealing member 25 move backward due to the urging force of the urging means 19, 31. Therefore, when the water discharge is stopped, the nozzle water discharge ports 16 and 20 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.

  Moreover, since the sealing member 25 of the second nozzle water discharge port 20 is a deflector, the water discharge direction and the water discharge range can be regulated. Therefore, a desired water discharge pattern can be obtained.

  The water spray nozzle 5 of the present invention includes a nozzle body 35 in which a nozzle water outlet 40 is formed on the inner side of the tip, and a displaceable sealing member 41 provided on the front surface of the nozzle water outlet 40. The nozzle 5 is provided with a biasing member 43 as a biasing means for pressing the sealing member 41 against the nozzle water discharge port 40, and when the water is discharged, the sealing member 41 is displaced by the water discharge pressure, and the nozzle discharge. When the water outlet 40 is opened and the water discharge is stopped, the sealing member 41 is returned to the original position by the urging force of the urging means 43 and the nozzle water outlet 40 is closed. 40 can be 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.

  Further, the nozzle body 35 is formed with a rectangular flange 39 on the outer end of the tip, and an attachment member 37 surrounding the nozzle water discharge port 40 is attached to the flange 39, and the attachment member 37 Since the sealing member 41 and the urging means 43 are provided, it can be retrofitted to an existing water spray nozzle.

  In addition, the attachment member 37 includes a first attachment member 37b that sandwiches the upper portion of the flange portion 39 and a second attachment member 37a that sandwiches the lower portion of the flange portion 39. The attachment member 37 can be easily fixed to the water spray nozzle.

  In addition, a communication hole 42 is provided in the body portion of the nozzle body 5, and the sealing member 41 includes a sealing portion 41 a that closes the nozzle water outlet 40, and the nozzle body 5 that is continuous with the sealing portion 41 a. The arm portion 41b is pivotally fixed to the arm portion 41b, and the stopper portion 44 is provided on the inner surface of the arm portion 41b and seals the communication hole 42. In this case, a part of fire-extinguishing water flowing in the nozzle body 5 is discharged from the communication hole 42 and pushes up the plug portion 44. Therefore, the sealing portion 41a is pressed to the outside of the water discharge pattern and maintains its open state while the water is discharged, so this mechanism can also be called an opening degree holding mechanism. In the open state, since the sealing member 41 does not limit the water discharge pattern, a water discharge pattern as designed can be obtained.

  Further, a cylinder portion 45 that accommodates the piston 47 is provided on the opposite side of the head body 9 from the nozzle outlet 40, and the piston rod 49 of the piston 47 and the connecting portion 55 of the sealing member 41 are connected by the connecting member 53. Therefore, at the start of water discharge, part of the fire-extinguishing water flowing in the head main body 9 presses the piston 47, and the sealing member 41 is pulled by the connecting member 53. Therefore, since the sealing member 41 is pressed to the outside of the water discharge pattern and maintains its open state while water is discharged, this mechanism can also be called an opening degree holding mechanism. In the open state, since the sealing member 41 does not limit the water discharge pattern, a water discharge pattern as designed can be obtained.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS. 12 to 13. The same reference numerals as those in FIGS. 1 to 11 have the same names and functions. This embodiment can be applied to all the embodiments described above, but the difference between this embodiment and the first embodiment is that the contact surface (pressure contact surface) formed by the outer cylinder 11 and the annular flange 13 is as follows. A first drain groove 14 for draining residual water generated in the water spray nozzle 3 from the first nozzle outlet 16 is formed, and a contact surface (pressure contact surface) formed by the inner cylinder 15 and the sealing member 25. In addition, a second drainage groove 24 for draining the residual water generated in the water spray nozzle 3 from the second nozzle outlet 20 is formed, whereby the same dustproof as in all the above embodiments is formed. Although having a function, residual water inside the water spray head 3 that can be generated after water discharge can be drained from the nozzle water outlets 16 and 20 to the outside of the head 3 via the drain grooves 14 and 24.

  In FIG. 12, it is a figure explaining the example which formed the 1st drainage groove 14 in the contact surface side by the side of the outer cylinder 11 as a contact surface by the outer cylinder 11 and the annular collar part 13, and a contact surface Although the four first drain grooves 14 are formed at equal intervals radially on the front end surface 11c of the outer cylinder 11 as the center, the number is not limited to this.

  In FIG. 13, it is a figure explaining the example which formed the 2nd drainage groove 24 in the contact surface side by the side of the inner cylinder 15 as a contact surface by the inner cylinder 15 and the sealing member 25. In the inner cylinder 15 (nozzle mounting member 21) as the above, four second drain grooves 24 are formed at equal intervals radially from the second nozzle outlet 20 at the front end surface 21a. It is not limited to this.

  With such a configuration, the first nozzle water discharge port 16 of the near throwing nozzle 3 of the water discharge head 1 is pressed against the annular flange 13 in a normal time (when monitoring a fire) as shown in FIG. Therefore, almost all of the second nozzle outlet 20 is closed by the pressure contact of the sealing member 25 except for the drain grooves 14 and 24. Therefore, there is no possibility that dust will accumulate in the nozzle outlets 16 and 20. Further, after the end of water discharge at the time of inspection work or actual fire, the residual water that may be generated inside the nozzle 3 passes from the nozzle water outlets 16 and 20 to the outside of the head 3 via the drain grooves 14 and 24. Since the water can be drained, for example, it is not possible to discharge the water due to freezing of the remaining water.

  In addition, in FIG. 12, although the example which formed the 1st drain groove 14 in the contact surface side by the side of the outer cylinder 11 was demonstrated as a contact surface by the outer cylinder 11 and the annular collar part 13, a contact surface The 1st drainage groove can also be formed in the front end surface of the annular collar 13 as. Moreover, it is good also as what has a level | step difference structure as the drainage groove 14 communicating between the two members 11 and 13. For example, the outer cylinder 11 has a drainage groove 14 formed on the inner peripheral side of the distal end surface 11c, while the annular flange 13 has a drainage groove 14 formed on the outer peripheral side of the distal end surface, and the drainage grooves 14 communicate with each other. To do. Thereby, while improving a dustproof function, residual water can be drained reliably.

  Similarly, in FIG. 13, the example in which the second drainage groove 24 is formed on the contact surface side on the inner tube 15 side as the contact surface between the inner tube 15 and the sealing member 25 has been described. A second drainage groove may be formed on the front end surface of the sealing member 25 as a surface. Moreover, it is good also as what has a level | step difference structure as the drainage groove 24 communicating between the two members 15 and 25. For example, the inner cylinder 15 has a drainage groove 24 formed on the inner peripheral side of the distal end surface 21a, while the sealing member 25 has a structure in which the drainage groove 24 is formed on the outer peripheral side of the distal end surface and the drainage grooves 24 communicate with each other. To do. Thereby, while improving a dustproof function, residual water can be drained reliably.

  Further, a strip-shaped (warm-up) elastic sheet member is disposed in the drainage grooves 14 and 24 and the vicinity thereof so that dust can be prevented from flowing into the nozzle 3 but the remaining water can be discharged. A member may be arranged.

  As described above, the water spray nozzle 3 of the present invention includes the nozzle body 10 in which the nozzle water discharge ports 16 and 20 are formed, the sealing members 15 and 25 provided on the front surface of the nozzle body 10, and the sealing member. Urging members 19 and 31 as urging means for urging the stop members 15 and 25 toward the nozzle body 10 and closing the nozzle water discharge ports 16 and 20 with the sealing members 15 and 25, Sometimes, the nozzle water discharge ports 16 and 20 are opened along with the forward movement of the sealing members 15 and 25 due to water discharge pressure, and when the water discharge is stopped, the sealing members 15 and 15 due to the biasing force of the biasing means 19 and 31 are opened. 25 is a water spray nozzle 3 in which the nozzle water outlets 16 and 20 are closed in accordance with the backward movement of the nozzle 25, and the nozzle main body 10 and the sealing members 15 and 25 are brought into contact with the contact surfaces of the nozzle main body 10 The generated residual water Since it is obtained by forming a drainage groove 14 and 24 for draining from the nozzle outlets 16 and 20, when the water discharge stop, it is possible to automatically close the nozzle outlets 16 and 20. 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. Furthermore, it is possible to prevent the residual water generated inside from being discharged and being unable to discharge by freezing.

  The water spray nozzle 3 of the present invention includes a cylindrical outer cylinder 11 and an inner cylinder 15 that is attached to the outer cylinder 11 and has an annular flange 13 on the outer end of the tip. The inner cylinder 15 and the outer cylinder 11 In the water spray nozzle 3 in which the annular first nozzle water discharge port 16 is formed between the inner tube 15 and the second nozzle water discharge port 20 is formed inside the front end of the inner tube 15, the inner tube 15 is connected to the rear end side. And a biasing member 19 as a first biasing means for closing the first nozzle water discharge port 16 with the annular flange 13 and a front surface of the second nozzle water discharge port 20. Between the sealing member 25, a support ring 23 provided inside the inner cylinder 15 and holding the sealing member 25, and between the inner cylinder 15 and the holding member 23 of the sealing member 25 A second nozzle provided to urge the sealing member 25 toward the holding member 23; An urging member 31 as a second urging means for closing the water port 20 and a communication hole provided in the inner cylinder 15 for communicating the first nozzle water outlet 16 and the second nozzle water outlet 20. 18, and at the time of water discharge, the first nozzle water discharge port 16 and the second nozzle water discharge port 20 are opened along with the forward movement of the inner cylinder 15 and the sealing member 25 due to water discharge pressure, and the water discharge is stopped. Sometimes, the first nozzle outlet 16 and the second nozzle outlet 20 are closed as the inner cylinder 14 and the sealing member 25 are moved backward by the biasing force of the biasing means 19, 31. Further, a first drainage groove for draining residual water generated in the water spray nozzle 3 from the first nozzle outlet 16 on the contact surface between the outer cylinder 11 and the annular flange 13. 14 and the inner cylinder 15 and the sealing member 2 Since the second drainage groove 24 for draining residual water generated in the water spray nozzle 3 from the second nozzle outlet 20 is formed on the contact surface by Thus, the nozzle outlet 16 and 20 can be 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. Furthermore, it is possible to prevent the residual water generated inside from being discharged and being unable to discharge by freezing.

  In addition, since the drainage grooves 14 and 24 communicate with each other between the two members 11 and 15 (15 and 25) and have a step structure, the dustproof function can be enhanced and the remaining water can be reliably drained. .

DESCRIPTION OF SYMBOLS 1 Water discharge head 3 Water spray nozzle for near throw 5 Water spray nozzle for long throw 9 Head body 10 Nozzle body (for near throw)
11 Outer cylinder 11c Tip surface (outer cylinder)
13 annular flange 14 first drain groove 15 inner cylinder 16 first nozzle water discharge port 18 communication hole 19 biasing member 20 second nozzle water discharge port 21 nozzle mounting member 21a tip surface (nozzle mounting member)
24 Second drainage groove 25 Sealing member 31 Energizing member 35 Nozzle body (for long throw)
37 Attachment member 40 Nozzle outlet 41 Sealing member 43 Energizing member 45 Cylinder portion 47 Piston 50 Energizing member

Claims (4)

A cylindrical outer cylinder and an inner cylinder that is attached to the outer cylinder and has an annular flange on the outer side of the distal end, and an annular first nozzle outlet is formed between the inner cylinder and the outer cylinder. In the water spray nozzle in which the second nozzle water outlet is formed inside the tip of the inner cylinder,
A first urging means for urging the inner cylinder toward the rear end, and closing the first nozzle outlet at the annular flange;
A sealing member provided on the front surface of the second nozzle outlet,
A holding member provided inside the inner cylinder and holding the sealing member;
A second biasing means provided between the inner cylinder and the holding member of the sealing member, biasing the sealing member toward the holding member, and closing the second nozzle outlet;
A communication hole provided in the inner cylinder and communicating the first nozzle water outlet and the second nozzle water outlet;
At the time of water discharge, the first nozzle water discharge port and the second nozzle water discharge port are opened along with the forward movement of the inner cylinder and the sealing member due to water discharge pressure,
When the water discharge is stopped, the first nozzle water discharge port and the second nozzle water discharge port are closed as the inner cylinder and the sealing member are moved backward by the biasing force of the biasing means. Spray nozzle.   The water spray nozzle according to claim 1, wherein the sealing member of the second nozzle outlet is a deflector.   A first drainage groove for draining residual water generated in the water spray nozzle from the first nozzle outlet is formed on a contact surface between the outer cylinder and the annular flange, and the inner cylinder and the seal are sealed. The second drainage groove for draining the residual water generated in the water spray nozzle from the second nozzle outlet is formed on the contact surface with the stop member, or 2. The water spray nozzle according to 2. A nozzle water outlet is formed inside the tip, and is rotatably supported by a shaft portion having a biasing means that always closes the nozzle water outlet, so that the nozzle water outlet is opened by water discharge pressure. A water discharge head provided in the vertical direction to the head body as a near water spray nozzle through a head connecting cylinder so that a far water spray nozzle having a sealing member communicates with the head body screwed in the horizontal direction The water spray nozzle according to claim 1, wherein the water spray nozzle is formed.

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