JP2006110168A - Fire extinguishing nozzle for extinguisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire extinguishing nozzle for an extinguisher capable of surely switching fire extinguishing agents of different radiation distances in a prescribed order so as to radiate the fire extinguishing agent of a long radiation distance first. <P>SOLUTION: This fire extinguishing nozzle for the extinguisher comprises a first water discharge part 2 for discharging the fire extinguishing agent of the long radiation distance, a second water discharge part 3 for discharging the fire extinguishing agent of a shorter radiation distance than the first water discharge part, a flow path switching means 4 connected to the first water discharge part, the second water discharge part and the distal end of a hose for fire extinguishment to which the fire extinguishing agent is supplied from a proximal end for switching a flow path of introducing the fire extinguishing agent between the first water discharge part and the second water discharge part from the distal end of the hose for the fire extinguishment, and an operation part 5 for operating the flow path changeover of the flow path switching means 4. The flow path is switched by the flow path switching means in the order of a closed state, the first water discharge part and the second water discharge part by the operation of the operation part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fire extinguishing apparatus, and more particularly to a portable fire extinguishing nozzle for a package type fire extinguishing apparatus.

  Conventionally, as a fire extinguisher, for example, a fire extinguishing agent filling container and a pressurizing gas cylinder for introducing a pressurizing gas into the extinguishing agent filling container are housed in a storage box, and a fire extinguishing for radiating a fire extinguishing agent to the tip A fire extinguishing hose having a nozzle connected and a rear end connected to a fire extinguishing chemical filling container is housed in a storage box in a state of being wound around the extinguishing chemical filling container and the gas cylinder for pressurization (for example, Patent Document 1). reference).

Japanese Patent Laid-Open No. 11-290475

  In a fire site, a fire extinguisher generally takes out a fire hose from the storage box of such a fire extinguisher, has a fire extinguishing nozzle at the tip, radiates a fire extinguishing agent from the fire extinguishing nozzle, and gradually approaches the fire source. The fire is extinguished.

  As a fire extinguishing agent, there is one in which a foam extinguishing agent is used and a foam for extinguishing fire (extinguishing liquid) is generated from the foam extinguishing agent and jetted. The fire extinguishing foam has a short radiation distance due to the foam-like fire extinguishing agent, and the radiation distance is related to the foaming ratio of the generated fire extinguishing foam, and the higher the foaming capacity is, the lower the radiation distance is. In general, the fire extinguishing work is performed by radiating a fire extinguishing agent or the like from a position far from the fire source and gradually approaching the fire source according to the fire extinguishing situation. Therefore, it is desirable to first create a fire extinguishing foam with a long radiation distance and extinguish the fire, and then switch to a fire extinguishing foam with a short radiation distance but high fire extinguishing ability. Was not considered. For this reason, for example, if a fire extinguishing foam with a short radiation distance is first jetted from the fire extinguishing nozzle, the operator may approach the fire to try to extinguish the fire, and there is a possibility that safe fire extinguishing activities cannot be performed. was there. Such a problem is not limited to the fire extinguishing nozzle for the foam fire extinguisher, and the same applies to the fire extinguishing nozzle for the fire extinguishing apparatus using other fire extinguishing agents.

  The present invention has been made to solve the above-described problems, so that fire extinguishing agents having different radiation distances can be switched in a predetermined order so that a fire extinguishing agent having a long radiation distance is first emitted. An object is to provide a fire extinguishing nozzle for a fire extinguishing apparatus.

  The present invention includes a first water discharge unit that discharges a fire extinguishing agent having a long radiation distance, a second water discharge unit that discharges a fire extinguishing agent having a shorter radiation distance than the first water discharge unit, and the first water discharge unit. And the second water discharge part and the extinguishing hose to which the extinguishing chemical is supplied from the base end, and the extinguishing between the first water discharging part and the second water discharging part from the extremity of the extinguishing hose. A flow path switching means for switching the flow path for introducing the medicine, and an operation section for operating the flow path switching of the flow path switching means, and the flow path switching by the flow path switching means by the operation of the operation section. The fire-extinguishing nozzle for a fire-extinguishing apparatus is configured to be switched from the closed state in the order of the first water discharge unit and the second water discharge unit.

  In the present invention, when the fire extinguishing agent is a fire extinguishing foam, first, by operating the operation section, a fire extinguishing foam with a low radiation ratio but a long radiation distance is radiated from the first water discharge section, so the fire power is suppressed from a distance. Then, by the operation of the operation part again, the radiation distance from the second water discharge part is shorter than that of the first water discharge part, but the fire extinguishing foam having a higher foaming ratio is radiated. And fire extinguishing work can be performed smoothly. In the unlikely event that the operator panics, fire extinguishing foam with a long radiation distance is emitted first, so it can be sprayed from a distance and safe fire extinguishing activities can be performed. In addition, when the fire extinguishing agent is fire extinguishing water (or a strengthening liquid, etc.), first, by operating the operation unit, fire extinguishing water having a narrow spray range but a long radiation distance is emitted from the first water discharge unit. Next, by operating the operation section again, the radiation distance from the second water discharge section is smaller than that of the first water discharge section, but wide-angle water discharge with a wider spraying range is performed, and the fire can be extinguished at once. As with fire extinguishing foam, fire extinguishing work can be performed smoothly and safe fire extinguishing activities can be performed.

Embodiment 1 FIG.
FIG. 1 is a schematic sectional view showing the structure of a fire extinguishing nozzle for a fire extinguishing apparatus according to an embodiment of the present invention. In FIG. 1, a fire-extinguishing nozzle 1 includes a low-foaming water discharging portion 2 as a first water discharging portion, a middle-foaming water discharging portion 3 as a second water discharging portion, and a three-way valve 4 and 3 as a flow path switching means. A lever 5 is provided as an operation unit for operating the valve 4. The fire extinguishing hose 6 is supplied with a foam fire extinguishing agent from the proximal end (not shown), and the distal end is connected to the three-way valve 4. The three-way valve 4 is connected to the tip of the fire hose 6, the low foaming water discharge part 2 and the medium foaming water discharge part 3, and the low foaming water discharge part 2 and the medium foaming water discharge part 3 from the tip of the fire hose 6. The flow path through which the foam extinguishing agent is introduced is switched between and the flow path is switched by the operation of the lever 5.

  A fire extinguishing foam with a low expansion ratio has a feature that it can extinguish a distant fire because a sufficient radiation distance can be obtained. In addition, a fire-extinguishing foam with a high expansion ratio has a feature that it can wrap up fire with almost no rebound even if it collides with a radiation location, although its radiation distance is short. Therefore, as a fire extinguishing nozzle for a foam fire extinguisher, a plurality of water discharge parts with different foaming ratios are provided, and at the time of a fire, first, fire extinguishing foam with a low foaming ratio is used to suppress the force of fire from a distance, and then the foam is approached and foamed. If the fire is extinguished at once with a high-magnification fire extinguishing foam, fire extinguishing activities can be performed efficiently.

  The low foaming water discharge part 2 is a water discharge part with a low expansion ratio (about 10 times) and a long radiation distance (about 10 m). The air sucked from the pores 22 is discharged as low-foam fire extinguishing bubbles. The middle foaming water discharge part 3 is a water discharge part with a medium foaming ratio (about 70 times) and a short radiation distance (about 5 m), and the foam-extinguishing agent (liquid) from the middle foaming nozzle part 31 is a hollow cone (hollow cone). It is sprayed into a shape, hits the foamed net portion 32, and is discharged as a foaming medium foam by the air sucked from the vent 33. There is also a high foaming water discharge section with a higher expansion ratio, but this is a short radiation distance and dangerous for manual operation, and is generally a large installation type of equipment.

  When the lever 5 is operated so as to rotate about the rotation shaft 45, the first position A (closed (normal)), the second position B (low expansion radiation), and the third position C (medium expansion radiation) are sequentially operated. ), And as shown in a particularly enlarged manner in FIG. 2, locking portion receiving portions 51 and 52 formed on the lever 5 are provided on the locking portion 41 formed on the three-way valve 4 side. Abutting (the locking portion receiving portion 52 at the position A and the locking portion receiving portion 51 at the position C respectively abuts the locking portion 41), and then the first position A through the second position B. The rotation operation (both directions) is possible only within the range of the angle to the position C of 3. The locking portion 41 and the locking portion receiving portions 51 and 52 constitute locking means.

  FIG. 3 shows the state of the flow path into which the foam fire-extinguishing agent is introduced from the fire-extinguishing hose 6 in the three-way valve 4 at each of these positions. When the lever 5 is rotated, the flow path switching unit 42 inside the three-way valve 4 rotates around the rotation shaft 45 to perform flow path switching. The three-way valve 4 is connected to the tip of the fire hose 6 and the low foaming water discharge part 2 from the left and right in the drawing, and from the bottom to the middle foaming water discharge part 3. Nothing is connected, and a later-described flow path hole 42a is sealed. The flow path switching section 42 has a cross section on a plane perpendicular to the rotary shaft 45 for forming a flow path between the tip of the fire hose 6, the low foaming water discharge section 2, and the medium foam water discharge section 3 ( A channel hole 42a having a T-shaped horizontal cross section is formed, and the lever 5 is fixed to, for example, the channel switching unit 42 and operated so as to rotate it. FIG. 3 (a) shows the state of the first position A. This state shows a closed state in which the foam fire-extinguishing agent is not introduced into any of the water discharge sections 2 and 3, and the lever 5 is normally in this position. (b) shows the state of the second position B. In this state, the foam extinguishing agent is introduced from the fire hose 6 to the low foaming water discharge part 2 and the fire extinguishing foam is emitted from the low foaming water discharge part 2. . (c) shows the state of the third position C. In this state, the foam extinguishing agent is introduced from the fire hose 6 to the middle foaming water discharge part 3, and the fire extinguishing foam is radiated from the middle foaming water discharge part 3. .

  In the fire-extinguishing apparatus fire-extinguishing nozzle 1 configured as described above, the lever 5 is normally located at the position A, and when the operator operates the lever 5 during the fire-extinguishing operation, the foam-extinguishing water discharge unit 2 is always fire extinguisher first. Since the lever 5 passes through the position B where the medicine is introduced, first, since the foam for fire extinguishing is emitted from the low foaming water discharge part 2 with a low foaming ratio but a long radiation distance, the fire force can be suppressed from a distance, Next, by operating the lever 5 again, it becomes the position C where the foam fire-extinguishing agent is introduced into the middle foaming water discharge part 3, and the foaming distance is shorter from the middle foaming water discharge part 3 than the low foaming water discharge part 2. Since fire extinguishing bubbles with higher magnification and higher fire extinguishing ability are radiated, the fire can be extinguished at once and the fire extinguishing work can be performed smoothly. Also, even if the operator panics, the first fire is fire extinguishing foam with a long radiation distance, so it can be fired from a distance and safe fire fighting can be performed. The rotary lever 5 is normally positioned parallel to the longitudinal direction of the fire-extinguishing nozzle 1. Therefore, when the fire-extinguishing nozzle 1 is held by hand and approaches the fire, the lever 5 is accidentally moved. Operate and no longer misfire the fire-fighting foam.

  In addition, although the case where the fire extinguishing agent is a foam fire extinguisher in which the fire extinguishing agent is a foam for fire extinguishing has been described as one embodiment of the present invention, the present invention is not limited thereto, and may be a fire extinguishing apparatus using fire extinguishing water (or a strengthening liquid or the like). . At this time, a rod-like water discharge part is used as the first water discharge part, an umbrella-like water discharge part is used as the second water discharge part, and then the radiation distance is shorter than the first water discharge part from the rod-like water discharge part having a long radiation distance. Can be extinguished at a stretch by switching to an umbrella-like water discharge section that can spread evenly over a wide angle, and as with fire extinguishing foams, fire extinguishing work can be performed smoothly and safely. .

  In addition, there is a package-type fire extinguishing device as a fire extinguishing device, but this is not shown in detail, but a fire extinguishing agent filling container, a fire hose, a fire extinguishing nozzle, etc. are accommodated in a housing (storage box), and the extinguishing agent Therefore, it is preferable that fire extinguishing activities can be performed efficiently and reliably. Therefore, it is particularly useful to use the fire extinguishing nozzle disclosed in the present invention in a package type.

  The structure of the flow path switching portion 42, the lever 5, and the locking means 41, 51, 52 of the three-way valve 4 is not limited to the one described above, and a desired structure is possible as long as the same operation is possible. It can be.

It is a schematic sectional drawing which shows the structure of the fire extinguishing nozzle for fire extinguishing apparatuses by one Embodiment of this invention. It is the elements on larger scale of the fire extinguishing nozzle of FIG. It is a figure for demonstrating the state in each operation position of the lever of the fire extinguishing nozzle of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Fire extinguishing nozzle, 2 Low foaming water discharge part, 3 Medium foaming water discharge part, 4 3-way valve, 5 Lever, 6 Fire extinguishing hose, 21 Low foaming nozzle part, 22 Air vent, 31 Medium foaming nozzle part, 32 Foam net part, 33 Vent, 41 Locking part, 42 Channel switching part, 42a Channel hole, 45 Rotating shaft, 51, 52 Locking part receiving part.

Claims (3)

  A first water discharge unit that discharges a fire extinguishing agent having a long radiation distance; a second water discharge unit that discharges a fire extinguishing agent having a shorter radiation distance than the first water discharge unit; the first water discharge unit and the second water discharge unit; Connected to the water discharge part and the extremity of a fire hose to which fire extinguishing chemical is supplied from the base end, and the fire extinguishing chemical is introduced between the first water discharge part and the second water discharge part from the front end of the fire extinguishing hose. A flow path switching means for switching the flow path, and an operation section for operating the flow path switching of the flow path switching means, and the flow path switching by the flow path switching means by the operation of the operation section is from a closed state. The fire-extinguishing nozzle for a fire-extinguishing device is configured to be switched in the order of the first water discharge unit and the second water discharge unit.   The flow path switching means comprises a three-way valve having a flow path switching section that rotates according to the operation of the operation section about a rotation axis, and the operation section rotates from a lever that rotates the flow path switching section of the three-way valve. The operation unit is further configured to form a flow path from the first position where the flow path switching unit is closed to the first water discharge unit from the first position where the flow path switching unit is closed. Locking means that allows the flow path switching portion to operate only within a range from the tip of the fire hose to the third position that forms the flow path to the second water discharge portion via the position of 2. The fire-extinguishing nozzle for a fire-extinguishing apparatus according to claim 1, comprising:   The fire extinguishing nozzle for a fire extinguishing apparatus according to claim 2, wherein the lever is parallel to a longitudinal direction of the fire extinguishing nozzle when the operation unit is in a closed state.

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