Hand-held nitrogen fire extinguisher pressure reduction nozzle

Abstract

The invention discloses a pressure reducing nozzle of a portable nitrogen fire extinguisher, and belongs to the technical field of fire extinguishers. A hand-held nitrogen fire extinguisher pressure reduction nozzle comprises a nozzle part in threaded connection with a spray pipe at the end of a storage tank, the end, away from the spray pipe, of the nozzle part is in threaded connection with a horn mouth, and the nozzle part comprises a connecting pipe in threaded connection with the spray pipe, a connecting hose fixedly connected with the connecting pipe and a fixing pipe connected with the end, away from the connecting pipe, of the connecting hose. A nozzle is arranged in the fixed pipe; according to the invention, the rotary inclined hole nozzle design is adopted, so that the nitrogen injection counter-acting force is obviously reduced, and an operator can more stably control the portable fire extinguisher; the rotary inclined holes are used for guiding airflow, full coverage of the fire extinguishing agent in the horn mouth is achieved, the evenly-distributed airflow further improves the spraying uniformity of the horn mouth terminal, the coverage range of the fire extinguishing agent is expanded, the dual purposes of efficiently reducing pressure and improving the utilization efficiency of the fire extinguishing agent are achieved, and finally the fire extinguishing efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishers, and in particular to a decompression nozzle for a portable nitrogen fire extinguisher. Background Art

[0002] In response to the early stage of a fire, portable fire extinguishers are key equipment for early fire extinguishing, which can quickly, efficiently and accurately extinguish the fire source. Nitrogen fire extinguishing agents have many outstanding advantages compared with carbon dioxide fire extinguishing agents. The production cost of nitrogen is relatively low. When produced and applied on a large scale, it can effectively control costs and improve economic benefits; the global warming potential (GWP) of nitrogen is 0, which will not promote global warming at all, and it has good environmental friendliness; its ozone depletion potential (ODP) is also 0, which will not damage the ozone layer, meeting the current development concept of green environmental protection.

[0003] If the spraying components of traditional portable fire extinguishers (such as carbon dioxide fire extinguishers) are applied to portable nitrogen fire extinguishers, there will be many deficiencies. The storage tank of a portable nitrogen fire extinguisher stores high-pressure compressed nitrogen. When directly spraying with traditional spraying components, the impact of high-pressure gas will be too large. On the one hand, it will affect the fire extinguishing effect, and on the other hand, the reaction force of spraying is too large and it is easy to cause accidental injuries to the operator; at the same time, the nitrogen fire extinguishing agent is often unevenly distributed in the nozzle bell mouth, and it is difficult to ensure uniformity when it sprays out from the end of the bell mouth, thus reducing the fire extinguishing efficiency of the fire extinguishing agent. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a decompression nozzle for a portable nitrogen fire extinguisher.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A decompression nozzle for a portable nitrogen fire extinguisher includes a nozzle head threadedly connected to the spray pipe at the end of the storage tank. One end of the nozzle head away from the spray pipe is threadedly connected with a bell mouth. The nozzle head includes a connecting pipe threadedly connected to the spray pipe, a connecting hose fixedly connected to the connecting pipe, and a fixed pipe connected to the end of the connecting hose away from the connecting pipe. A nozzle is arranged in the fixed pipe, and a plurality of rotating inclined holes are evenly arranged in a circle on the nozzle. All the plurality of rotating inclined holes are arranged as spiral flow guiding grooves.

[0007] Preferably, annular grooves are provided on both the connecting pipe and the fixed pipe, and sealing washers are arranged in the annular grooves. The sealing washer on the connecting pipe is in movable contact with the spray pipe, and the sealing washer on the fixed pipe is in movable contact with the bell mouth.

[0008] Preferably, a mounting groove is provided on the fixed tube, a driving motor is fixed in the mounting groove, an output shaft of the driving motor is connected to a driving shaft, a main bevel gear is provided on the driving shaft, a secondary bevel gear is meshingly connected to the outer side of the main bevel gear, the secondary bevel gear is fixed on the outer side of the nozzle, and a movable groove for rotating the secondary bevel gear is provided on the fixed tube.

[0009] Preferably, the fixed tube includes a main tube body and an end tube, the mounting groove is provided on the main tube body, the movable groove is provided on the end tube, a sealing gasket which is movably abutted against the end tube is fixed on the main tube body, matching screw holes are provided on the main tube body and the end tube, and bolts are movably connected in the screw holes.

[0010] Preferably, the bell mouth includes a threaded seat threadedly connected to the fixed pipe, a ball groove opened in the threaded seat, a ball head movably connected in the ball groove, and a bell body fixedly connected to the ball head, a fixed shaft is fixed in the ball groove, the ball head is rotatably connected to the fixed shaft, and a discharge port connected to the fixed pipe is opened on the bell body and the ball head, and the nozzle passes through the bell mouth at one end away from the fixed pipe and extends into the discharge port.

[0011] Preferably, a first connecting plate is fixedly provided on the driving shaft, an end of the first connecting plate away from the driving shaft is movably connected to a second connecting plate, and an end of the second connecting plate away from the first connecting plate is movably connected to the speaker body.

[0012] Preferably, one side of the bottom of the speaker body is rotatably connected to a cover plate via a pin shaft, and the pin shaft is provided with a torsion spring for driving the cover plate to reset and rotate.

[0013] Preferably, a handle is slidably connected in the fixed tube, a movable plate is fixedly provided at the end of the handle, a sliding groove for sliding the movable plate is provided in the fixed tube, and an elastic element is provided between the inner wall of the sliding groove and the movable plate.

[0014] Preferably, a pull rope is fixedly provided on a side of the movable plate away from the handle, and an end of the pull rope away from the movable plate passes through the fixed tube and is connected to the cover plate.

[0015] Preferably, the connecting hose is made of high-pressure resistant stainless steel corrugated material, and the storage tank is made of high-pressure resistant alloy steel.

[0016] Compared with the prior art, the present invention provides a portable nitrogen fire extinguisher pressure reducing nozzle, which has the following features:

[0017] Beneficial effects:

[0018] 1. The decompression nozzle of the portable nitrogen fire extinguisher significantly reduces the jet reaction force by designing the nozzle with rotating inclined holes, which shunts the high-pressure gas through multiple rotating inclined holes, enabling the operator to more stably control the portable fire extinguisher. By using the rotating inclined holes to guide the air flow, the fire extinguishing agent is fully covered inside the bell mouth, and the uniform air flow further improves the uniformity of the jet at the end of the bell mouth. During the process of optimizing the internal structure of the nozzle, both the impact of high-pressure gas is reduced and the coverage range of the fire extinguishing agent is expanded, achieving the dual goals of efficient decompression and improved utilization efficiency of the fire extinguishing agent, and ultimately greatly improving the fire extinguishing efficiency.

[0019] 2. The decompression nozzle of the portable nitrogen fire extinguisher sprays the high-speed flowing nitrogen spirally along the direction of the inclined hole wall to form rotational kinetic energy and sprays it in a diffused form, achieving multi-angle shunting of high-pressure gas. The dispersed high-pressure gas collides and mixes with each other inside the bell mouth after entering the bell mouth, enabling the fire extinguishing agent to be fully covered and uniformly mixed inside the bell mouth. The drive shaft drives the main bevel gear to rotate, meshing and driving the secondary bevel gear outside the nozzle. The secondary bevel gear drives the nozzle to rotate in the same direction as the rotating inclined holes. When the nitrogen discharged from the rotating inclined holes rotates in the same direction as the nozzle, the speed of the nitrogen discharged towards the bell mouth is increased, forming a greater resultant speed, thereby increasing the spraying range of nitrogen and improving the fire extinguishing efficiency.

[0020] 3. The decompression nozzle of the portable nitrogen fire extinguisher drives the first connecting plate to rotate when the drive shaft rotates, causing the first connecting plate to drive the second connecting plate to move, the second connecting plate to drive the bell body to move, and the bell body to drive the ball head to rotate around the fixed shaft, thereby causing the bell body to swing reciprocally, expanding the spraying range of nitrogen, eliminating the need for manual swinging by the staff to adjust the fire extinguishing area, reducing the work intensity of the staff, and ensuring the fire extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall structural schematic diagram of the present invention;

[0022] Figure 2 is the structural schematic diagram of the nozzle part of the present invention;

[0023] Figure 3 is the sectional structural schematic diagram of the spray pipe and the connecting pipe of the present invention;

[0024] Figure 4 is the sectional structural schematic diagram of the nozzle part of the present invention;

[0025] Figure 5 is of the present invention Figure 4 enlarged structural schematic diagram of part A;

[0026] Figure 6 is the partial sectional structural schematic diagram of the fixed pipe of the present invention;

[0027] Figure 7 Schematic structural diagram when the horn body of the present invention rotates;

[0028] Figure 8 Schematic cross-sectional structure diagram of the threaded seat of the present invention.

[0029] In the figure: 1, storage tank; 101, spray pipe; 2, spray head; 201, connecting pipe; 202, connecting hose; 203, fixed pipe; 2031, main pipe body; 2032, end pipe; 3, bell mouth; 301, threaded seat; 302, ball groove; 3021, fixed shaft; 303, ball head; 304, horn body; 4, nozzle; 401, rotating inclined hole; 5, annular groove; 501, sealing washer; 6, installation groove; 601, drive motor; 602, drive shaft; 6021, first connecting plate; 6022, second connecting plate; 603, main bevel gear; 604, sub-bevel gear; 7, movable groove; 8, sealing gasket; 9, bolt; 10, cover plate; 11, grip; 111, moving plate; 12, sliding groove; 121, elastic element; 13, pull rope. Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements; for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Example: Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a pressure reducing nozzle for a portable nitrogen fire extinguisher, which includes a nozzle head 2 threadedly connected to the nozzle pipe 101 at the end of a storage tank 1. A flaring mouth 3 is threadedly connected to the end of the nozzle head 2 away from the nozzle pipe 101. The nozzle head 2 includes a connecting pipe 201 threadedly connected to the nozzle pipe 101, a connecting hose 202 fixedly connected to the connecting pipe 201, and a fixed pipe 203 connected to one end of the connecting hose 202 away from the connecting pipe 201. A nozzle 4 is arranged in the fixed pipe 203. A plurality of rotating inclined holes 401 are evenly arranged in a circumferential direction on the nozzle 4, and the plurality of rotating inclined holes 401 are all arranged as spiral diversion grooves.

[0034] Specifically, both ends of the nozzle head 2 are respectively threadedly connected to the nozzle pipe 101 and the flaring mouth 3, which is convenient for quick disassembly and replacement of the nozzle head 2. The nozzle 4 provided with the rotating inclined holes 401 is arranged at the spraying end of the nozzle head 2, and its unique internal spiral diversion groove structure plays a key role. The spiral diversion groove can guide the high-pressure nitrogen to generate a rotating motion, disperse the energy of the nitrogen in the circumferential direction, reduce the axial impact force, and achieve preliminary pressure reduction. The plurality of rotating inclined holes 401 can increase the spraying coverage range of the nitrogen, reduce the spraying reaction force, and achieve efficient fire extinguishing. Moreover, after the dispersed nitrogen ejected from the rotating inclined holes 401 enters the flaring mouth 3, it collides and mixes with each other inside the flaring mouth 3, so that the nitrogen is fully covered and evenly mixed inside the flaring mouth 3, ensuring that the nitrogen can more effectively cover the fire source during fire extinguishing and improving the fire extinguishing efficiency.

[0035] Refer to Figure 2 , Figure 3 and Figure 5 , as a preferred technical solution of the present invention, annular grooves 5 are provided on both the connecting pipe 201 and the fixed pipe 203, and sealing washers 501 are arranged in the annular grooves 5. The sealing washer 501 on the connecting pipe 201 is movably abutted against the nozzle pipe 101, and the sealing washer 501 on the fixed pipe 203 is movably abutted against the flaring mouth 3; specifically, by providing the sealing washer 501 on the connection surfaces of the nozzle head 2 with the flaring mouth 3 and the nozzle pipe 101, the overall sealing performance of the nozzle head 2 is improved, ensuring tight connection and no leakage risk.

[0036] Refer to Figure 2 , Figure 4 , Figure 5 and Figure 6, as a preferred technical solution of the present invention, an installation groove 6 is formed on the fixed pipe 203. A driving motor 601 is fixedly arranged in the installation groove 6. An output shaft of the driving motor 601 is connected with a driving shaft 602. A main bevel gear 603 is arranged on the driving shaft 602. A secondary bevel gear 604 is meshed and connected to the outside of the main bevel gear 603. The secondary bevel gear 604 is fixedly arranged on the outside of the nozzle 4. An activity groove 7 for the rotation of the secondary bevel gear 604 is formed on the fixed pipe 203. Specifically, by controlling the operation of the driving motor 601, the output shaft of the driving motor 601 drives the main bevel gear 603 to mesh with the secondary bevel gear 604. The secondary bevel gear 604 drives the nozzle 4 to rotate in the same direction as the spiral diversion groove of the rotary inclined hole 401. When the nitrogen gas discharged from the rotary inclined hole 401 rotates in the same direction as the nozzle 4, the speed of the nitrogen gas discharged towards the bell mouth 3 is increased, forming a greater synthesis speed, thereby improving the spraying range of the nitrogen gas and the fire extinguishing efficiency. It should be noted that the fast-flowing nitrogen gas is guided by the rotary inclined hole 401 to reduce the impact of the high-pressure gas.

[0037] Refer to Figure 4 , Figure 5 and Figure 6 , as a preferred technical solution of the present invention, the fixed pipe 203 includes a main pipe body 2031 and an end pipe 2032. The installation groove 6 is formed on the main pipe body 2031. The activity groove 7 is formed on the end pipe 2032. A sealing gasket 8 that is fixedly arranged on the main pipe body 2031 and abuts against the end pipe 2032 movably is provided. Matching screw holes are formed on the main pipe body 2031 and the end pipe 2032. A bolt 9 is movably connected in the screw holes. Specifically, by splitting the fixed pipe 203 into the main pipe body 2031 and the end pipe 2032, it is convenient for the installation of the driving motor 601 and the secondary bevel gear 604. The sealing gasket 8 effectively improves the overall sealing performance of the fixed pipe 203.

[0038] Refer to Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , as a preferred technical solution of the present invention, the bell mouth 3 includes a threaded seat 301 threadedly connected to the fixed pipe 203, a ball groove 302 formed in the threaded seat 301, a ball head 303 movably connected in the ball groove 302, and a bell body 304 fixedly connected to the ball head 303. A fixed shaft 3021 is fixedly arranged in the ball groove 302. The ball head 303 is rotatably connected to the fixed shaft 3021. Discharge ports communicating with the fixed pipe 203 are formed on the bell body 304 and the ball head 303. One end of the nozzle 4 far away from the fixed pipe 203 passes through the bell mouth 3 and extends into the discharge port.

[0039] Further, a first connecting plate 6021 is fixedly provided on the drive shaft 602. One end of the first connecting plate 6021 away from the drive shaft 602 is movably connected to a second connecting plate 6022. One end of the second connecting plate 6022 away from the first connecting plate 6021 is movably connected to the horn body 304.

[0040] Specifically, when the drive shaft 602 rotates, it drives the first connecting plate 6021 to rotate, causing the first connecting plate 6021 to drive the second connecting plate 6022 to move. The second connecting plate 6022 drives the horn body 304 to move, and the horn body 304 drives the ball head 303 to rotate around the fixed shaft 3021, thereby causing the horn body 304 to swing reciprocally, expanding the nitrogen spraying range. There is no need for staff to manually swing to adjust the fire extinguishing area, reducing the work intensity of the staff and ensuring the fire extinguishing effect.

[0041] Refer to Figure 1 、 Figure 2 and Figure 4 As a preferred technical solution of the present invention, one side of the bottom of the horn body 304 is rotatably connected to a cover plate 10 through a pin shaft, and a torsion spring for driving the cover plate 10 to rotate back to its original position is arranged on the pin shaft. Specifically, by arranging the cover plate 10 at the bottom of the horn body 304, it is convenient to block the horn body 304 with the cover plate 10 when the fire extinguisher is not in use, preventing impurities or dust from entering the horn body 304 and affecting the rapid mixing and flow of nitrogen in the horn body 304 subsequently.

[0042] Refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As a preferred technical solution of the present invention, a grip 11 is slidably connected in the fixed pipe 203. A moving plate 111 is fixedly provided at the end of the grip 11. A sliding groove 12 for the moving plate 111 to slide is opened in the fixed pipe 203, and an elastic element 121 is arranged between the inner wall of the sliding groove 12 and the moving plate 111.

[0043] Further, a pull rope 13 is fixedly provided on the side of the moving plate 111 away from the grip 11. One end of the pull rope 13 away from the moving plate 111 passes through the fixed pipe 203 and is connected to the cover plate 10.

[0044] Specifically, when using the fire extinguisher, the staff holds the pliers handle at the top of the fire extinguisher with one hand to control the opening and closing of the valve and the discharge of high-pressure nitrogen, and holds the grip 11 with the other hand to move the grip 11 away from the fixed pipe 203, thereby controlling the overall fire extinguishing direction of the horn mouth 3. When the grip 11 moves away from the fixed pipe 203, the moving plate 111 exerts a pulling force on the pull rope 13, and the pull rope 13 pulls the cover plate 10, causing the cover plate 10 to flip around the pin shaft, preventing the cover plate 10 from obstructing the high-pressure nitrogen ejected from the horn mouth 3 during fire extinguishing.

[0045] Refer to Figure 1, as a preferred technical solution of the present invention, the connecting hose 202 is made of high-pressure-resistant stainless steel corrugated material, and the storage tank 1 is made of high-pressure-resistant alloy steel material; specifically, the storage tank 1 is made of high-pressure-resistant alloy steel material, and the connecting hose 202 is made of high-pressure-resistant stainless steel corrugated material, which can effectively suppress the impact of high-pressure gas.

[0046] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A portable nitrogen fire extinguisher pressure reducing nozzle, comprising a nozzle head (2) threadedly connected to a nozzle pipe (101) at the end of a storage tank (1), characterized in that, One end of the spray head (2) away from the spray pipe (101) is threadedly connected with a flared mouth (3). The spray head (2) includes a connecting pipe (201) threadedly connected with the spray pipe (101), a connecting hose (202) fixedly connected with the connecting pipe (201), and a fixed pipe (203) connected to one end of the connecting hose (202) away from the connecting pipe (201). A nozzle (4) is arranged in the fixed pipe (203), and a plurality of rotating inclined holes (401) are evenly arranged in a circumferential manner on the nozzle (4). The plurality of rotating inclined holes (401) are all arranged as spiral diversion grooves.

2. The decompression nozzle of a portable nitrogen fire extinguisher according to claim 1, characterized in that, Annular grooves (5) are formed on both the connecting pipe (201) and the fixed pipe (203). Sealing washers (501) are arranged in the annular grooves (5). The sealing washer (501) on the connecting pipe (201) is in movable contact with the spray pipe (101), and the sealing washer (501) on the fixed pipe (203) is in movable contact with the flared mouth (3).

3. The decompression nozzle of a portable nitrogen fire extinguisher according to claim 2, characterized in that, An installation groove (6) is formed on the fixed pipe (203). A driving motor (601) is fixedly arranged in the installation groove (6). An output shaft of the driving motor (601) is connected with a driving shaft (602). A main bevel gear (603) is arranged on the driving shaft (602). A secondary bevel gear (604) is meshed and connected to the outside of the main bevel gear (603). The secondary bevel gear (604) is fixedly arranged on the outside of the nozzle (4). An activity groove (7) for the rotation of the secondary bevel gear (604) is formed on the fixed pipe (203).

4. The pressure reducing nozzle of a portable nitrogen fire extinguisher according to claim 3, characterized in that, The fixed pipe (203) includes a main pipe body (2031) and an end pipe (2032). The installation groove (6) is formed on the main pipe body (2031), and the activity groove (7) is formed on the end pipe (2032). A sealing gasket (8) that is in movable contact with the end pipe (2032) is fixedly arranged on the main pipe body (2031). Matching screw holes are formed on both the main pipe body (2031) and the end pipe (2032), and a bolt (9) is movably connected in the screw holes.

5. The pressure-reducing nozzle of a portable nitrogen fire extinguisher according to claim 4, characterized in that, The flared mouth (3) includes a threaded seat (301) threadedly connected with the fixed pipe (203), a ball groove (302) formed in the threaded seat (301), a ball head (303) movably connected in the ball groove (302), and a flared body (304) fixedly connected with the ball head (303). A fixed shaft (3021) is fixedly arranged in the ball groove (302). The ball head (303) is rotatably connected with the fixed shaft (3021). Discharge ports that are communicated with the fixed pipe (203) are formed on both the flared body (304) and the ball head (303). One end of the nozzle (4) away from the fixed pipe (203) passes through the flared mouth (3) and extends into the discharge port.

6. The decompression nozzle of a portable nitrogen fire extinguisher according to claim 5, characterized in that, A first connecting plate (6021) is fixedly arranged on the driving shaft (602). One end of the first connecting plate (6021) away from the driving shaft (602) is movably connected with a second connecting plate (6022). One end of the second connecting plate (6022) away from the first connecting plate (6021) is movably connected with the flared body (304).

7. The decompression nozzle of a portable nitrogen fire extinguisher according to claim 6, characterized in that, One side of the bottom of the speaker body (304) is rotatably connected to a cover plate (10) via a pin shaft, and a torsion spring is provided on the pin shaft for driving the cover plate (10) to return and rotate.

8. A decompression nozzle for a portable nitrogen fire extinguisher according to claim 7, characterized in that, A handle (11) is slidably connected inside the fixed tube (203), a movable plate (111) is fixedly provided at the end of the handle (11), a sliding groove (12) for the movable plate (111) to slide is provided inside the fixed tube (203), and an elastic element (121) is provided between the inner wall of the sliding groove (12) and the movable plate (111).

9. The pressure reducing nozzle of a portable nitrogen fire extinguisher according to claim 8, characterized in that, A pull rope (13) is fixedly provided on the side of the movable plate (111) away from the handle (11), and one end of the pull rope (13) away from the movable plate (111) passes through the fixed tube (203) and is connected to the cover plate (10).

10. The decompression nozzle of a portable nitrogen fire extinguisher according to claim 1, characterized in that, The connecting hose (202) is made of high-pressure resistant stainless steel corrugated material, and the storage tank (1) is made of high-pressure resistant alloy steel.

Images