Smoke and toxic gas intake and removal type firefighting nozzle device

Abstract

This invention relates to a smoke and toxic gas intake and removal type firefighting nozzle device. This device receives water supplied from a fire hose and sprays it forward through an internal passage. It includes a spray head with multiple intake holes that open the internal passage to the outside, and a gas introduction guider built into the spray head that guides the inflow gas flowing into the spray head through the intake holes and mixes it with the water by the Venturi phenomenon caused by the water being sprayed.

Description

[Technical field]

[0001] The present invention relates to a firefighting nozzle device, which is one type of fire suppression device, and more specifically to a smoke and toxic gas intake and removal type firefighting nozzle that sprays water and also sucks in surrounding smoke and toxic gas so that the toxic gas is dissolved in the water or mixed with water and added to the flame, thereby helping to ensure the firefighter's field of vision, minimizing damage caused by toxic gas, and suppressing fires more efficiently than spraying water alone. [Background technology]

[0002] Among the various equipment used to suppress fires, a fire nozzle, also known as a gun, is a mechanism attached to the end of a fire hose that sprays water supplied through the fire hose onto flames. There are various types of fire nozzles, including a direct-fire nozzle with a relatively simple structure, and a pistol-type nozzle equipped with a handle, lever, reflector, etc., which is mainly used by firefighters. The pistol-type nozzle allows the water spray angle and flow rate to be adjusted.

[0003] Meanwhile, firefighters are faced with flames and toxic gases when they enter buildings to put out a fire. Although they can defuse flames and heat to some extent by spraying water, they have been unable to take appropriate measures against toxic gases, which are fatally toxic to the human body and also impair visibility, making it difficult to put out a fire.

[0004] The background art of the invention relating to such a fire suppression nozzle device is disclosed in Korean Patent Publication No. 10-1780221 (Fire Pipe Gun).

[0005] The disclosed fire gun is a fire gun consisting of an opening / closing member to the rear end of which is connected a fire hose, and a nozzle member connected to the tip of the opening / closing member, in which the nozzle member includes a nozzle whose rear end is fastened to the tip of the opening / closing member, a cover body supported so as to be movable back and forth relative to the nozzle, a movable spindle supported so as to open and close the tip of the nozzle and be movable back and forth relative to the nozzle, and a rear spring that adds elasticity in a direction pulling the movable spindle rearward relative to the nozzle, the nozzle includes a fixed nozzle fastened to the opening / closing member, and a movable nozzle supported so as to be movable back and forth relative to the fixed nozzle, the rear spring is provided between the fixed nozzle and the movable spindle, and the movable spindle opens and closes the tip of the movable nozzle, and is composed of a front spring that adds elasticity in a direction pushing the movable nozzle forward relative to the fixed nozzle.

[0006] However, the above-mentioned conventional fire extinguishing guns only have a mechanical structure that absorbs the recoil of the gun when water is sprayed, and do not propose any technology for removing toxic gases generated during a fire.

[0007] Nozzle devices designed to spray water and remove smoke and toxic gases are currently required to ensure the visibility of firefighters who are putting out fires, to save lives, to increase work efficiency, and to ensure the health of individual firefighters. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been created to solve the above problems, and has an object to provide a smoke and toxic gas suction and removal type firefighting nozzle device which, by injecting water and sucking in and removing surrounding smoke and toxic gases, ensures visibility and is of great help in quickly entering the scene, and can eliminate in advance the danger of firefighters being injured in various accidents caused by smoke and toxic gases blocking their visibility, allowing for quick entry and more swift extinguishing of the fire, and thus enabling the rescue of lives. [Means for solving the problem]

[0009] The smoke and toxic gas suction and removal type firefighting nozzle device of the present invention, which is a means for solving the problems to achieve the above object, receives water supplied from a fire hose and sprays it forward through an internal passage, and has multiple internal passages that are open to the outside. (Excluding 2 and below) The intake vents On the outer surface Preparation The fire extinguisher is connected to an end of a fire hose via a hose connection part and is disposed in front of a connection body that receives and passes water and can move forward and backward. The device is provided with an injection head and a gas introduction guider that is built into the injection head and guides the inflow gas flowing into the injection head through an intake hole and mixes it with the water by the Venturi effect caused by the injection of water.

[0010] In addition, the smoke and toxic gas suction and removal type firefighting nozzle device of the present invention, which is a means for solving the problems to achieve the above object, comprises a connection body that is connected to the end of a fire hose via a hose connection part and receives and passes water, a hollow slider tube that is fixed to the front of the connection body and provides a male screw part, and a slider tube that is screwed into the male screw part of the slider tube and moves forward and backward through a rotational motion, and a number of (Excluding 2 and below) The intake vents On the outer surface the connecting body having one end fixed therein, a shaft which passes through a slider tube and extends into the injection head; a deflector which is fixed to the extended end of the shaft and is located inside the injection head to collide with the injected water and adjust the spread angle of the injected water as the injection head moves forward and backward; and a gas guide means which is provided inside the injection head and which guides the flow of gas when external gas flows into the injection head through the intake hole due to negative pressure caused by the Venturi effect produced by the injection of water through the injection head, thereby allowing the water to be mixed with the gas.

[0011] The air intake holes are spaced equally apart along the circumference of the injection head, and the gas guiding means is a hollow member that allows water to pass through and has a fixed part that is fixed inside the injection head and a gas guiding part that is integrated with the fixed part to cover the air intake hole and guides the gas flowing in through the air intake hole to its outer circumferential surface and into the water flow field.

[0012] The air intake holes are equiangularly arranged along the circumferential direction of the injection head, and the gas guiding means is a hollow member that allows water to pass through, is fixed to the sliding tube, covers the air intake holes, and has a gas introduction guider that guides the gas flowing in through the air intake holes to its outer circumferential surface and sends it to the water flow field.

[0013] In addition, a surfactant supplying means is further provided for injecting a surfactant into the inside of the connecting body so that the water is mixed with the surfactant and gas and sprayed in a foamed state, so that the device can also be used as a chemical pick-up type bubble gun.

[0014] The connecting body further includes a handle that is gripped by a user, and the supply line includes an inner hose having one end exposed to the inside of the connecting body and the other end open to the outside of the handle via a hose connecting part, and a supply hose that is detachably connected to the hose connecting part and introduces a surfactant to the inner hose, so that the supply line can also be used as a chemical pick-up type bubble gun.

[0015] The smoke and toxic gas intake and removal type firefighting nozzle device of the present invention, which is a means for solving the problems to achieve the above object, comprises a hollow pipe type connecting body extending in the longitudinal direction and having a striking part to be struck by a hammer and a hose connecting part to be connected to a fire hose, and a plurality of wires fixed to the tip of the connecting body. (Excluding 2 and below) The intake vents On the outer surface The punch casing has a formed hole, an injection head fixed to the punch casing and having an injection port for spraying water that has passed through the internal space of the punch casing and equipped with a pierce tip that pierces an object in front when the striking part is struck, and a gas introduction guider housed inside the punch casing and uses the Venturi effect generated when water is injected to guide the flow of gas flowing in through the intake hole so that the gas is mixed with the water.

[0016] The gas introduction guider is fixed to the end of the connecting body and takes the form of a hollow pipe that covers the intake hole while being spaced apart at a fixed interval from the inner peripheral surface of the perforated casing. Effect of the Invention

[0017] The smoke and toxic gas suction and removal type firefighting nozzle device of the present invention constructed as described above creates negative pressure when injecting water, and sucks in and removes surrounding smoke and toxic gases using the negative pressure, thereby helping firefighters to maintain their field of vision and minimizing damage caused by toxic gases.

[0018] In addition, because an inert gas such as unaffected nitrogen, which is 78% of smoke and toxic gases, is mixed with water and sprayed, it can suppress fires more effectively than spraying water alone. [Brief description of the drawings]

[0019] [Figure 1] 1 is a perspective view of a smoke and toxic gas inhalation and removal type firefighting nozzle device according to a first embodiment of the present invention. FIG. [Diagram 2] 1 is a perspective view of a smoke and toxic gas inhalation and removal type firefighting nozzle device according to a first embodiment of the present invention. FIG. [Diagram 3] FIG. 2 is a diagram for explaining the internal configuration of the nozzle device shown in FIG. [Figure 4] FIG. 2 is a diagram for explaining the internal configuration of the nozzle device shown in FIG. [Diagram 5] FIG. 2 is a diagram for explaining the internal configuration of the nozzle device shown in FIG. [Figure 6a] FIG. 2 is a diagram for explaining the internal configuration of the nozzle device shown in FIG. [Figure 6b] FIG. 2 is a diagram for explaining the internal configuration of the nozzle device shown in FIG. [Figure 7] FIG. 4 is a diagram showing a modified example of the nozzle device according to the first embodiment of the present invention. [Figure 8] FIG. 8 is a perspective view showing a separate enlarged view of part A in FIG. 7. [Figure 9] FIG. 2 is a diagram for explaining a straight-radiating pipe gun (dedicated for fire extinguishing) of the nozzle device according to the first embodiment of the present invention. [Figure 10] FIG. 2 is a diagram for explaining a straight-radiating pipe gun (dedicated for fire extinguishing) of the nozzle device according to the first embodiment of the present invention. [Figure 11] FIG. 2 is a diagram for explaining a straight-radiating pipe gun (dedicated for fire extinguishing) of the nozzle device according to the first embodiment of the present invention. [Figure 12] FIG. 2 is a diagram for explaining a straight-radiating pipe gun (dedicated for fire extinguishing) of the nozzle device according to the first embodiment of the present invention. [Figure 13] FIG. 11 is a perspective view of a pierce nozzle device according to a second embodiment of the present invention. [Figure 14a] FIG. 14 is a diagram separately showing the injection head portion of the pierce nozzle device shown in FIG. 13. [Figure 14b] FIG. 14 is a diagram separately showing the injection head portion of the pierce nozzle device shown in FIG. 13. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

[0021] The firefighting nozzle device of the present invention sprays water toward a flame and also sucks in surrounding smoke and toxic gases, dissolving the smoke and toxic gases in the water or adding them to the flame in a mixed state with water, thereby helping to ensure the firefighter's field of vision, minimizing damage caused by smoke and toxic gases, and suppressing fires more efficiently than spraying water alone. It simultaneously performs two tasks: suppressing a flame using water and removing smoke and toxic gases.

[0022] This invention is based on the fact that while water is being sprayed through the spray head, the pressure inside the spray head is reduced due to the Venturi effect, that most of the smoke and toxic gases are water-soluble and are dissolved in water and removed, and that smoke and toxic gases contain only a small amount of oxygen but are made up of inert gases such as about 78% or more of unaffected nitrogen, which does not dissolve in water but suffocates flames.

[0023] In the present invention, a gas intake hole is formed in the injection head in order to utilize the Venturi phenomenon. By forming the intake hole, surrounding smoke and toxic gases can be sucked in, and the gas can be dissolved and removed by the intake, and nitrogen gas can be added to the flame. This will be explained in detail later.

[0024] The nozzle device of the present invention receives water supplied from a fire hose and sprays it forward through an internal passage. It has the following basic components: an injection head equipped with multiple air intake holes that open the internal passage to the outside, and a gas introduction guider built into the injection head that guides the flow of gas flowing into the injection head through the air intake holes and mixes it with the water by the Venturi phenomenon caused by the injection of water.

[0025] Figures 1 and 2 are perspective views of a smoke and toxic gas inhalation and removal type firefighting nozzle device 10 according to a first embodiment of the present invention, and Figures 3 to 6a and 6b are diagrams for explaining the internal configuration of the nozzle device shown in Figure 1.

[0026] As shown in the figure, the smoke and toxic gas inhalation and removal type firefighting nozzle device 10 according to this embodiment includes a connecting body 11, a slider tube 19, an injection head 40, a shaft 24, a deflector (25), a direct guide vane 23, and a gas guide means.

[0027] The connecting body 11 is connected to a fire hose and has a hose connecting part 17 at its rear end. An end of the fire hose is detachably connected to the hose connecting part 17. Water supplied through the fire hose passes through the connecting body 11, slider tube 19, gas guide means, and injection head 40 in that order, and is injected forward.

[0028] A lever 15 and a handle 13 are provided on the upper and lower parts of the connecting body 11. The lever 15 serves to open or close a ball valve (not shown) built into the connecting body 11. Water can be sprayed or stopped via the lever 15. The handle 13 is a part that a user holds with his or her hand. In addition, a thread portion 11a is provided at the tip of the connecting body 11. The thread portion 11a is the part to which a slider tube 19 is connected.

[0029] The slider tube 19 is a cylindrical member that is coupled to the screw thread portion 11a, and has a male screw portion 19a at its end. The male screw portion 19a screws into a slider tube connector 44, which will be described later. The slider tube connector 44 can rotate in both directions while supported by the slider tube 19. By rotating in both directions, the ejection head 40 moves forward or backward.

[0030] Further, a direct guide vane 23 and a shaft 24 are provided inside the connecting body 11 and the slider tube 19. The direct guide vane 23 is a guide wall that straightens the streamline of the water heading toward the jet head 40. The shaft 24 is a round bar-like member that is fixed to the central axis of the slider tube 19 and extends forward, and has a deflector 25 at its extended end. It serves to fix the deflector 25. The deflector 25 is a disk-like member that is fixed to the extended end of the shaft and collides with the water that passes through the jet head and is jetted out.

[0031] The configurations of the connecting body 11, slider tube 19, shaft 24, deflector 25, and direct guide vanes 23 are the same as those of a general firefighting nozzle, so further explanation will be omitted.

[0032] Meanwhile, the ejection head 40 can be rotated left and right by the user while being screwed into the male thread portion 19a of the slider tube 19. The user can rotate the ejection head 40 clockwise or counterclockwise. Of course, by rotating the ejection head 40, the ejection head 40 moves forward or backward.

[0033] Since the deflector 25 remains fixed to the shaft 24, moving the ejection head 40 forward or backward changes the minimum distance between the inner peripheral surface 41e of the head and the outer peripheral edge of the deflector 25, and accordingly changes the spread angle of the ejected water.

[0034] The jet head 40 receives water supplied from the upstream side and jets it forward, and has a number of intake holes 41c that are open in the lateral direction. The intake holes 41c are through holes spaced at regular intervals along the circumferential direction of the jet head 40, and open the internal space of the jet head 40 to the outside. Water passing through the jet head 40 does not escape to the outside through the intake holes 41c. This is because the intake holes 41c are covered to some extent by the gas guide portion 21b described later, and further, negative pressure is formed at the jet port 41a of the jet head 40 due to the Venturi effect. When negative pressure is formed, external gas is naturally sucked into the inside of the jet port 41a through the intake holes 41c.

[0035] A coupling part 43 and a slider tube connecting part 44 are fixed in that order to the rear end of the injection head 40. The coupling part 43 is a ring-shaped member with a female thread formed on the inner circumferential surface, and is screwed into the fixing part 21a of the gas introduction guider 21. By coupling the fixing part 21a to the coupling part 43, the gas introduction guider 21 is maintained in a fixed state inside the injection head 40, as shown in Figures 6a and 6b.

[0036] The slider tube connecting part 44 is a ring-shaped member that provides a female screw opening 44a, and is fixed to the rear of the coupling part 43. The male screw part 19a screws into the female screw opening 44a. As described above, by connecting the slider tube connecting part 44 and the male screw part 19a, the spray head 40 can be rotated left and right to adjust the spreading angle of the water flow.

[0037] In this embodiment, the gas introduction guider 21 is used as the gas guider. The gas introduction guider 21 is a cylindrical member with a constant diameter that is fixed inside the injection head 40, and has a fixing part 21a and a gas guide part 21b. The fixing part 21a is a part that has a male screw thread formed on the outer circumferential surface, and is screwed into the coupling part 43.

[0038] The gas guide portion 21b is a portion that covers the intake hole 41c. The gas guide portion 21b is not in close contact with the inner peripheral surface 41e of the injection head 40, but is spaced at a certain interval to form a gas flow passage 41d. The gas flow passage 41d is a passage through which the toxic gas sucked in through the intake hole 41c passes. After passing through the gas flow passage 41d, the toxic gas meets and mixes with the water that has passed through the gas introduction guider 21.

[0039] On the other hand, the negative pressure inside the injection head 40 is formed by the Venturi effect. That is, the flow cross-sectional area of ​​the water passing around the deflector 25 is smaller than the flow cross-sectional area of ​​the water passing through the gas introduction guider 21. As is known, when the flow cross-sectional area of ​​the fluid is small for the same flow rate, the flow velocity increases, and the increased flow velocity reduces the pressure.

[0040] In this embodiment, the flow cross-sectional area around the deflector 25 is significantly smaller than the flow cross-sectional area of ​​the gas introduction guider, so the pressure inside the injection head 40 is inevitably low. Therefore, the toxic gas outside the injection head 40 passes through the intake hole 41c and the gas flow passage 41d, and is mixed with the water (injected from the gas guide 21b) inside the injection head 40.

[0041] Among various smoke and toxic gases that flow into the injection head 40, the liquid particulate toxic gases are removed by being dissolved and diluted in water, while the solid particulate soot, grime, ultrafine dust, etc. are physically adsorbed and injected together, and the remaining nitrogen (N2) gas is mixed with water and injected into the flame to cool and smother the flame. About 78% of the inert gas, such as unaffected nitrogen, is added to the flame by gaining the kinetic energy of the water. This allows for quicker extinguishing of the fire than by injecting only water. It is significant that the fire can be quickly extinguished without the need for additional equipment.

[0042] FIG. 7 is a diagram showing a modified example of the nozzle device 10 according to the first embodiment of the present invention, and FIG. 8 is a perspective view showing a separate enlarged view of part A in FIG.

[0043] Referring to the drawings, it can be seen that a surfactant supplying means may be added to the fire nozzle device 10. The surfactant supplying means is a device for injecting a surfactant into the connecting body 11. By injecting the surfactant into the connecting body 11, water can be mixed with the surfactant and toxic gas to form bubbles, which can be sprayed toward the flames.

[0044] It is a well-known fact that foam extinguishing agents are effectively used to extinguish fires in hazardous materials storage facilities, outdoor oil tanks, liquefied gas storage facilities, aircraft hangars, chemical plants, etc., by mixing air with a foam solution and spraying it on the fire.

[0045] The surfactant supply means comprises a surfactant tank 51 and a supply line. The surfactant tank 51 is a container in which a surfactant is stored. The surfactant tank 51 may be mounted on a fire engine, or the agent may be carried in a dedicated container.

[0046] The supply line guides the surfactant into the connecting body 11, and is sucked into the side with a faster flow rate according to the ejector principle, and transports the surfactant in the surfactant tank 51 into the connecting body 11 via the supply hose 55 and the internal hose 56.

[0047] The internal hose 56 is a tube built into the handle 13, with one end exposed inside the connecting body 11 and the other end opening to the outside of the lower end of the handle via the hose connecting part 13b. The hose connecting part 13b is an accessory having a male thread formed on its outer circumferential surface, and can be connected to the fixing nut 55a or cap 57 of the supply hose 55 as shown in FIG.

[0048] When the fixing nut 55a is connected to the hose connecting portion 13b, the supply hose 55 and the internal hose 56 are connected in communication. When the fixing nut 55a is removed from the hose connecting portion 13b and a cap 57 is fixed in that position, the internal hose 56 is sealed. When the internal hose is not in use, the cap 57 must be fixed to prevent foreign matter from entering the internal hose 56.

[0049] 9 to 12 are diagrams for explaining modified examples of the nozzle device according to the first embodiment of the present invention. The nozzle device of the type shown in the drawings is a rectangular pipe gun, which is a small nozzle that is mainly provided inside a fire hydrant of a building.

[0050] Hereinafter, the same reference numerals as those used above refer to the same components having the same functions.

[0051] As shown in the figure, the nozzle device 10 according to the modified example comprises a connecting body 11, a slider tube 19, a gas introduction guider 21, and an injection head 40. The nozzle device 10 of the type shown in Fig. 9 has a simpler structure, and the handle and lever described above are omitted.

[0052] The connecting body 11 is connected to a fire hose via a hose connecting portion 17 to receive and pass water. In addition, the slider tube 19 is fixed to the connecting body 11 and rotatably supports the injection head 40 via a male thread portion 19a.

[0053] The gas introduction guider 21 is simply a hollow pipe, and is fixed to the male threaded portion 19a of the slider tube 19. The gas introduction guider 21 allows water to pass through the inside, and provides a gas flow passage 41d to the outside. That is, the gas flowing in through the intake hole is guided to its outer circumferential surface and sent to the deflector 25 side. The toxic gas that flows into the intake hole 41c passes through the gas flow passage 41d, and is then mixed with water and ejected forward. The principle by which the toxic gas from the outside flows into the inside of the injection head 40 is due to the above-mentioned Venturi effect. Figures 9 to 12 show a direct-radiation pipe gun, which is mainly installed inside a fire hydrant of a building.

[0054] FIG. 13 is a perspective view of a nozzle device according to a second embodiment of the present invention, and FIGS. 14a and 14b are views of a fire piercing nozzle separately showing the injection head portion of the nozzle device shown in FIG.

[0055] The nozzle device 10 according to the second embodiment is, for example, a piercing nozzle having a piercing function. As is known, a piercing nozzle has a function of piercing a fire door or a wall and spraying fire extinguishing water into an enclosed space when a fire breaks out inside the space.

[0056] The nozzle device 10 according to the second embodiment includes a connecting body 11, an ejection head 40, and a gas introduction guider 21.

[0057] The connecting body 11 is a straight hollow pipe extending in the longitudinal direction, and has a striking portion 61 and a hose connecting portion 17 .

[0058] The striking part 61 is the part that is struck with a hammer. After the tip of the nozzle device 10, i.e., the injection head 40, is positioned against a wall, the striking part 61 is struck, and the nozzle device 10 penetrates the wall just like a nail. The hose connecting part 17 is the part to which a fire hose is connected. After the injection head 40 penetrates the fire space, if a fire hose is connected to the hose connecting part 17 and water is supplied, the water is scattered into the fire space.

[0059] On the other hand, the injection head 40 is composed of a piercing casing 41 and a piercing tip 63. The piercing casing 41 is a cylindrical member having an inner diameter larger than the inner diameter of the connecting body 11, and has a number of intake holes 41c around it. The intake holes 41c are passages through which toxic gases from the surrounding area flow in.

[0060] The piercing tip 63 is a member fixed to the punching casing 41, and has a pointed tip. The piercing tip 63 is provided with a number of nozzles 63a. The nozzles 63a are holes through which water that has passed through the connecting body 11 and the gas introduction guider 21 is sprayed. Naturally, the total flow cross-sectional area of ​​the nozzles 63a is relatively small compared to the flow cross-sectional area of ​​the gas introduction guider 21. The water that has passed through the gas introduction guider 21 is accelerated as it passes through the nozzles 63a. The pressure around the nozzles 63a drops, causing the Venturi phenomenon.

[0061] The gas introduction guider 21 is a hollow pipe of a certain diameter fixed to the end of the connecting body 11. The inner diameter of the gas introduction guider 21 is the same as the inner diameter of the connecting body 11. The gas introduction guider 21 covers the intake hole 41c while being spaced apart at a certain interval from the inner peripheral surface of the punching casing 41. In addition, the outer peripheral surface of the gas introduction guider 21 provides a gas flow passage 41d between the inner peripheral surface of the punching casing.

[0062] In the end, the toxic gas around the injection head 40 passes through the intake hole 41c and the gas flow passage 41d due to the Venturi effect that occurs around the injection port 63a when water is injected, and is then mixed with the water inside the pierce tip 63 and released.

[0063] As a result, the toxic gas suction and removal type firefighting nozzle device 10 according to the first and second embodiments configured as described above injects water and inhales surrounding smoke and toxic gases, and liquid particulate toxic gases that flow in are dissolved and diluted in water and removed, solid particulate soot, grime, ultrafine dust, etc. are physically adsorbed, and the remaining nitrogen (N2) gas is mixed with water and injected into the flame to cool and smother the flame. For example, about 78% of inert gas such as nitrogen gas (unaffected nitrogen) is added to the flame by obtaining the kinetic energy of water.

[0064] This not only ensures firefighters' visibility, but also minimizes damage from toxic gases and can extinguish fires more efficiently than spraying water alone.

[0065] Although the present invention has been described in detail above through specific examples, the present invention is not limited to the above examples, and various modifications can be made by those having ordinary skill in the art within the scope of the technical concept of the present invention.

Claims

1. a spray head that receives water supplied from a fire hose and sprays it forward through an internal passage, has a number of intake holes (excluding two or less) on its outer surface that open the internal passage to the outside, is connected to the end of the fire hose via a hose connection part, and is arranged in front of a connecting body that receives and passes water and can move forward and backward; A gas introduction guider is provided in the injection head and guides the inflow gas flowing into the injection head through the intake hole to mix with the water by the Venturi effect caused by the injection of water. Firefighting nozzle device for inhaling and removing smoke and toxic gases.

2. A connection body that is connected to an end of the fire hose via a hose connection portion and receives and passes water; a hollow slider tube fixed to the front of the connecting body and providing a male thread; an injection head that is screwed into the male thread of the slider tube and moves back and forth through a rotational motion, and has a number of intake holes (excluding two or less) on its outer surface; a shaft having one end fixed to the inside of the connecting body and extending through the slider tube into the inside of the ejection head; a deflector that is fixed to the extension end of the shaft and collides with the water being ejected while being located inside the ejection head, and that adjusts the spread angle of the ejected water according to the forward and backward movement of the ejection head; a gas guide means provided inside the injection head for guiding the flow of gas so that the water is mixed with the gas when the gas flows into the injection head through the intake hole by a negative pressure caused by the Venturi effect generated by injecting the water through the injection head; Firefighting nozzle device for inhaling and removing smoke and toxic gases.

3. The air intake holes are equally spaced along the circumference of the injection head, The gas directing means comprises: A hollow member that allows water to pass through has a fixed part that is fixed inside the injection head, and a gas guide part that is integrated with the fixed part to cover the intake hole and guides the gas that flows in through the intake hole to its outer circumferential surface and into the water flow field.

3. A smoke and toxic gas inhalation and removal type fire fighting nozzle device according to claim 2.

4. The air intake holes are equiangularly arranged along the circumferential direction of the injection head, The gas directing means comprises: A hollow member that allows water to pass through, the hollow member having a gas introduction guide fixed to the sliding tube, covering an intake hole, and guiding the gas flowing in through the intake hole to the outer circumferential surface of the gas introduction guide to the water flow field.

3. A smoke and toxic gas inhalation and removal type fire fighting nozzle device according to claim 2.

5. A surfactant supplying means is further provided for injecting a surfactant into the connecting body so that the water is mixed with the surfactant and gas and sprayed in a foamed state, and the device can also be used as a chemical pick-up type bubble gun.

3. A smoke and toxic gas inhalation and removal type fire fighting nozzle device according to claim 2.

6. The connecting body further includes a handle for a user to grasp. The supply line is an internal hose having one end exposed to the inside of the connecting body and the other end open to the outside of the handle via a hose connecting portion; A supply hose is detachably connected to the hose connection part to guide the surfactant to the inner hose, and can be used as a chemical pick-up type bubble gun.

6. A smoke and toxic gas inhalation and removal type fire fighting nozzle device according to claim 5.

7. A hollow pipe-type connecting body extending in a longitudinal direction and including a striking portion to be struck by a hammer and a hose connecting portion to be connected to a fire hose; a punching casing fixed to the tip of the connecting body and having a number of (excluding two or less) intake holes formed on its outer surface; a jet head fixed to the punching casing and having an injection port for injecting water that has passed through the internal space of the punching casing, and equipped with a piercing tip that pierces an object in front of it when the striking part is struck; A gas introduction guider is included, which is housed inside the punching casing and guides the flow of gas flowing in through the intake hole by the Venturi effect generated when the water is injected, so that the gas is mixed with the water. Firefighting nozzle device for inhaling and removing smoke and toxic gases.

8. The gas introduction guider is It is fixed to the end of the connecting body and has the shape of a hollow pipe that covers the intake hole at a constant distance from the inner peripheral surface of the perforated casing.

8. A smoke and toxic gas inhalation and removal type fire fighting nozzle device according to claim 7.

Images