JP2005137742A - Water discharge nozzle for fire extinguishing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water discharge nozzle for fire extinguishing, which allows wide variety selection of water discharging patterns from spraying discharge to straight discharge of water, by regulating pattern-changeable discharge nozzle, allows to perform foam water discharge through a foam jetting nozzle by using discharging pattern switching means, and by which water discharging pattern can be changed freely, according to the situation of a fire site. <P>SOLUTION: The discharge nozzle for fire extinguishing is provided with a foam jet nozzle 3 and a changeable water discharge nozzle 4 in parallel. The changeable water discharge nozzle 4 allows to change a water discharging pattern between spraying discharge to straight discharge of water smoothly. The pattern can be switched to any one of patterns by the use of a changing means 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fire-fighting water discharge nozzle, and more particularly to a fire-fighting water discharge nozzle that can discharge water by switching a water discharge pattern in accordance with the situation of the fire at a fire site.

  In general, fire extinguishing activities at a fire site are mainly used for water fire extinguishing by discharging water to the fire, but it is necessary to change the pattern of water discharge depending on the situation of the fire site and the process of extinguishing the fire.

  There are basically three types of water discharge patterns: rod-type water discharge, spray water discharge, and bubble water discharge. Bar-like water discharge is a large amount of water that is released in a rod shape, and is suitable for extinguishing a large amount of water from a distance against a burning flame, but on the other hand, because it emits a large amount of water, Has the disadvantage of being large.

  In contrast, spray water discharge radiates a small amount of water in the form of a mist, and when the fire is weakened at the end of fire fighting, the firefighter can approach the fire source while blocking the radiant heat with the mist. It is suitable for cooling and extinguishing the fire source with a widespread fog.

  Foam water discharge is a water discharge pattern that is mainly used for oil fires. It mixes water with chemicals and foams them to release the foam, and extinguishes suffocation by covering the fire source of the oil fire with foam. Suitable for

  These water discharge patterns are properly used according to the fire situation and the degree of fire suppression. That is, in a general fire, a building that burns violently is extinguished with a large bar-shaped water discharge from a distance, but if the fire is not so large, a firefighter enters the building and discharges water appropriately to the fire source. Water is discharged in a pattern and the fire is extinguished.

  In such a case, it is necessary for the firefighters who have entered the building to determine the water discharge pattern at the spot, and to switch the water discharge pattern on the spot to discharge the water. There is a need for a nozzle.

  As a water discharge nozzle that can cope with such a plurality of water discharge patterns, for example, one disclosed in Japanese Patent Application Laid-Open No. 2001-276669 is known. This one emits by switching between rod-like water discharge and spray water discharge. Japanese Patent Application Laid-Open No. 2000-140144 also shows that the water discharge pattern can be switched between rod-like water discharge and bubble water discharge.

However, although these can cope with two types of water discharge patterns, they do not correspond to all of the above-mentioned three types of water discharge patterns, and there are restrictions on fire extinguishing activities at the fire site.
JP 2001-276669 A JP 2000-140144 A

  The present invention has been made in view of such circumstances, and can discharge water in all three types of water discharge patterns of rod-shaped water discharge, spray water discharge, and foam water discharge, and any pattern according to the situation at the fire site. It aims at providing the water discharge nozzle for fire extinguishing which can discharge in water.

  Thus, in the present invention, the variable water discharge nozzle capable of continuously converting the water discharge pattern from the rod-shaped water discharge to the spray water discharge and the foam radiation nozzle are arranged in parallel, and both of them can be switched by the switching means. It is characterized by.

  According to the present invention, by adjusting the variable water discharge nozzle, it is possible to select the water discharge pattern during the period from the rod-like water discharge to the spray water discharge, and it is also possible to perform the bubble water discharge from the bubble radiation nozzle by switching with the switching means. The water discharge pattern can be changed freely according to the situation at the fire site.

  Embodiments of the present invention will be described below with reference to the drawings. The drawing shows a water discharge nozzle 1 for fire extinguishing according to the present invention, 2 is a handle, a foam radiation nozzle 3 and a variable water discharge nozzle 4 are juxtaposed at the tip of the handle 2, and the handle. 2 is provided with a hose connection 5.

  In the handle 2, a water passage 7 is formed from the connecting portion 5 to the tube tip portion 6, and an opening / closing valve 8 is formed in the middle of the water passage 7 to operate a trigger 9 provided on the handle 2. By doing so, the on-off valve 8 is opened and closed.

  Further, a switching valve 10 as a switching means is provided at the tip of the handle 2, and the foam radiation nozzle 3 and the variable water discharge nozzle 4 are connected to the switching valve 10. A valve body 11 is rotatably provided in the switching valve 10, and the valve body 11 is rotated by a switching lever 12, whereby the water passage 7 is set to one of the bubble radiation nozzle 3 and the variable water discharge nozzle 4. To connect selectively.

  The bubble emitting nozzle 3 is provided with a tube tip member 15 having a water outlet 14 at the tip of a water passage 13 connected to the water passage 7 via a switching valve 10, and the foam tube 16 is provided outside the tube tip member 15. And a plurality of air intake holes 17 are formed at positions corresponding to the water discharge ports 14 in the foamed cylinder 16.

  Then, by releasing the water added with the foaming agent from the tube tip member 15, the air is sucked from the intake hole 17, and the discharged water collides with the inner surface of the foam tube 16 and is mixed with the sucked air to foam. As a result, bubbles are discharged from the tip of the foam cylinder 16.

  The variable water discharge nozzle 4 has a nozzle body 19 attached to the tip of a water passage 18 connected to the water passage 7 via a switching valve 10, and a spiral rugged strip formed on the outer surface of the tip of the nozzle body 19. A control member 20 is projected, and a plurality of water passage holes 21 are formed around the control member 20.

  A control cylinder 22 is screwed into the nozzle body 19, and a cylinder tip member 24 having a water discharge port 23 is attached to the tip of the control cylinder 22, and the control member 20 is loosely fitted inside the cylinder tip member 24. A void 25 is formed.

  Then, by rotating the control cylinder 22 with respect to the nozzle body 19, the control cylinder 22 advances and retreats with respect to the nozzle body 19 by the action of the screw, and the control member 20 enters and leaves the space 25, and the water discharge port. The water discharge pattern from 23 can be changed from rod-like water discharge to spray water discharge.

  Thus, when the switching lever 12 is rotated backward as shown in FIG. 1, the switching valve 10 connects the water passage 7 to the water passage 18 of the variable water discharge nozzle 4. When the trigger 9 is pulled in this state, the on-off valve 8 is opened, and the water sent from the hose (not shown) connected to the connecting portion 5 passes through the water passage 7 and passes through the switching valve 10 and the variable water discharge nozzle 4. Through the water passage 18 and into the variable discharge nozzle 4.

  Water that has flowed into the nozzle body 19 in the variable water discharge nozzle 4 flows into the control cylinder 22 through the water passage hole 21. Here, as shown in FIG. 1 and FIG. 2 (a), in a state where the control cylinder 22 is moving forward with respect to the nozzle body 19, the control member 20 is detached from the void 25 and is placed in the control cylinder 22. The inflowing water is smoothly discharged straight from the water outlet 23 without being affected by the control member 20, and a rod-like water discharge is obtained.

  From this state, when the control cylinder 22 is rotated with respect to the nozzle body 19 and is retracted by the action of a screw, the control member 20 is placed in the space 25 of the cylinder tip member 24 as shown in FIG. enter in.

  Therefore, when the water in the control cylinder 22 passes through the void 25, the control member 20 receives a large resistance, and further, a rotational force is applied by the spiral ridges and grooves formed on the surface of the control member 20. . Therefore, the water discharged from the water discharge port 23 is mist-like and scattered over a wide area to obtain spray water discharge.

  Further, according to the variable water discharge nozzle 4 shown in FIG. 1, the resistance and the rotational force received by the water also vary depending on the degree of entry of the control member 20 into the void 25, so It is possible to change the range and reach of the water discharged from the outlet 23 by adjusting the degree of the water, and arbitrarily set an intermediate water discharge pattern from a rod-like water discharge to a wide range of spray water discharge You can choose.

  Next, when the switching lever 12 is rotated forward, the valve body 11 is rotated and the switching valve 10 cuts off the connection between the water flow path 7 and the water flow path 18 of the variable water discharge nozzle 4 and the water flow path 7. It connects to the water flow path 13 of the foam radiation nozzle 3.

  In this state, the foaming agent is added to the water by an appropriate means, and when the trigger 9 is pulled and the on-off valve 8 is opened, the water containing the foaming agent flows from the water passage 7 into the water passage 13 through the switching valve 10, It is discharged from the water outlet 14 of the tube tip member 15 into the foamed tube 16.

  Further, water containing the foaming agent is discharged from the water discharge port 14 into the foaming cylinder 16, whereby air is sucked from the intake hole 17, and the discharged water and air are mixed in the foaming cylinder 16, and the foaming medicine is obtained. Bubbles are generated by the above action, and the bubbles are discharged from the tip of the foam cylinder 16 to obtain foam water discharge.

  Therefore, according to the present invention, by rotating the control cylinder 22 in the variable water discharge nozzle 4, it is possible to select the water discharge pattern from the rod-shaped water discharge to the spray water discharge. The three types of water discharge patterns can be switched as necessary to discharge water in an arbitrary pattern.

Center longitudinal cross-sectional view of the water discharge nozzle for fire extinguishing of the present invention It is the center longitudinal cross-sectional view of the variable water discharge nozzle in this invention, Comprising: (a) shows the state of rod-shaped water discharge, (b) shows the state of spray water discharge. Front view of the water discharge nozzle for fire extinguishing of the present invention The top view of the water discharge nozzle for fire extinguishing of this invention Back view of the water discharge nozzle for fire extinguishing of the present invention Bottom view of fire-fighting water discharge nozzle of the present invention Left side view of the water discharge nozzle for fire extinguishing of the present invention Right side view of the water discharge nozzle for fire fighting of the present invention

Explanation of symbols

1 Water discharge nozzle for fire extinguishing 3 Foam radiation nozzle 4 Variable water discharge nozzle 10 Switching valve

Claims (1)

The variable water discharge nozzle (4) capable of continuously converting the water discharge pattern between the rod-shaped water discharge and the spray water discharge and the foam radiation nozzle (3) are arranged in parallel, and both of them can be switched by the switching means (10). Water discharge nozzle for fire extinguishing, characterized by

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