Nozzle structure of handheld fire extinguisher

Abstract

The utility model discloses a hand-held fire extinguisher's nozzle structure, including the shower nozzle main part, one side of shower nozzle main part is fixedly connected with the spray pipe, the inside of spray pipe is provided with adjusting subassembly and auxiliary subassembly, the adjusting subassembly includes the mounting shell, one side of mounting shell top is rotatingly connected with the rotating shaft, and the rotating shaft is rotatingly connected with the rotating shaft. The bottom end of the rotating shaft is fixedly connected with a first gear; a stud is rotationally connected to the interior of the mounting shell, a second gear and a threaded sleeve are arranged outside the stud, a moving block is fixedly connected to the bottom of the threaded sleeve, and an isolation telescopic cover is fixedly connected to the outer side of the moving block. A moving ring is slidably connected to the interior of the spray pipe, an extrusion ring is fixedly connected to one side of the moving ring, and a plurality of guide plates are further fixedly connected to the interior of the spray pipe; the isolation telescopic cover and the mounting shell can prevent air pressure in the spraying pipe from leaking from the sliding groove, the air pressure utilization rate of the fire extinguisher tank is increased, and rescue workers are indirectly protected.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology, specifically to a nozzle structure for a handheld fire extinguisher. Background Technology

[0002] Fire extinguishers are the most common fire-fighting equipment in fire protection facilities and are generally stored in easily visible locations in public places. Because fire extinguishers contain different extinguishing media, they can be used to extinguish different types of fires. Furthermore, different fire extinguishers contain different media and use different nozzle structures. However, most existing fire extinguisher nozzles use constant pressure, spraying according to the internal pressure of the extinguishing tank. This makes it impossible to control the spray distance of the extinguishing media through the nozzle. If the fire is large and rescuers are too close to the fire source, burns or other safety accidents can easily occur, reducing the safety of using fire extinguishers.

[0003] Publication number CN221713426U discloses a straight nozzle for a fire extinguisher, including a nozzle pipe. The diameter of the left end face of the nozzle pipe is smaller than the diameter of the right end face. A movable tube is movably connected to the side wall of the nozzle pipe. Several rubber blocks are fixedly connected to the end face of the nozzle pipe, and the end faces of the rubber blocks are inclined. An adjustment component is provided on the side wall of the nozzle pipe. The adjustment component includes a screw sleeve, which is threadedly connected to the side wall of the nozzle pipe. An annular plate is fixedly connected to the left end face of the screw sleeve. An annular groove is formed on the right end face of the movable tube. The inner wall of the movable tube is inclined near the left end, and the inclined part of the inner wall of the movable tube corresponds to the inclined surface of the rubber block. This invention can solve the problem of inconvenience in adjusting the nozzle range in existing methods and effectively improve the flexibility of nozzle use. However, this patent still has the following problems in actual use:

[0004] When adjusting the above-mentioned device, a non-sealed chute is required. However, when the nozzle is in use, gaps in the chute structure can cause pressure leakage. This leakage accelerates the waste of gas pressure inside the fire extinguisher canister, which in turn allows rescuers to get closer to the fire source more quickly, ensuring that the sprayed carbon dioxide can effectively reach the fire source, thus increasing the safety risks for rescuers.

[0005] A nozzle structure for a handheld fire extinguisher is proposed to address the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a nozzle structure for a handheld fire extinguisher to solve the problem mentioned in the background art that when adjusting the device, it is necessary to use a non-sealed sliding groove. When the nozzle is in use, the gaps in the sliding groove structure will cause pressure leakage. Pressure leakage will accelerate the waste of gas pressure in the fire extinguisher canister, which will make rescuers approach the fire source more quickly to ensure that the sprayed carbon dioxide can effectively approach the fire source, thus increasing the safety hazards for rescuers.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a nozzle structure for a handheld fire extinguisher, comprising a nozzle body, a nozzle pipe fixedly connected to one side of the nozzle body, and a nozzle cover fixedly connected to one end of the nozzle pipe;

[0008] The nozzle is internally equipped with an adjustment component and an auxiliary component. The adjustment component includes a mounting shell, which is fixed to the top of the nozzle. A rotating shaft is rotatably connected to one side of the top of the mounting shell. A first gear is fixedly connected to the bottom end of the rotating shaft, and a knob is fixedly connected to the top end of the rotating shaft.

[0009] The mounting housing is rotatably connected to a stud, and the stud is provided with a second gear and a threaded sleeve on its outside. A movable block is fixedly connected to the bottom of the threaded sleeve, and an isolation telescopic cover is fixedly connected to the outside of the movable block. A sliding groove is opened at the top of the nozzle, and a protruding strip is fixedly connected to the outside of the movable block.

[0010] The nozzle has a sliding ring inside, a compression ring fixedly connected to one side of the sliding ring, and several guide plates fixedly connected inside the nozzle. The compression ring is in close contact with the guide plates.

[0011] Preferably, the threaded sleeve and the stud are slidably connected by threads, the second gear is fixedly connected to the stud, and the second gear is meshed with the first gear.

[0012] Preferably, one side of the isolation telescopic cover is fixedly connected to the movable block, and the other side of the isolation telescopic cover is fixedly connected to the inner wall of the mounting shell.

[0013] Preferably, both the movable block and the protrusion are slidably connected to the groove, and the bottom of the movable block is fixedly connected to the protrusion.

[0014] Preferably, one side of the extrusion ring is attached to the guide plate, and the other side of the extrusion ring is attached to the inner wall of the nozzle.

[0015] Preferably, the auxiliary component includes an annular groove formed inside the nozzle housing, a plurality of protruding tubes are fixedly connected inside the nozzle, the protruding tubes communicate with the annular groove, a through groove is also formed inside the nozzle housing, the through groove is connected to the annular groove, a connecting pipe is provided outside the through groove, and a protective cap is threaded onto the connecting pipe.

[0016] Preferably, the through groove is fixedly connected to the outside of the nozzle, and the connecting pipe can be threadedly connected to an external fireproof pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the nozzle structure of this handheld fire extinguisher, with its isolation telescopic cover and mounting shell, can prevent the air pressure inside the nozzle from leaking out through the sliding groove, improve the air pressure utilization rate of the fire extinguisher canister, and prevent air leakage and pressure drop from causing the leaked low-temperature gas to come into contact with the user's hands, thus avoiding harm. The specific details are as follows:

[0018] 1. Rotating the shaft causes the first gear to rotate, which in turn drives the second gear to rotate. The second gear then causes the threaded sleeve to move horizontally. This horizontal movement of the threaded sleeve causes the isolation telescopic cover to fold and deform. Simultaneously, the convex strip causes the moving ring to move horizontally inside the nozzle. As the moving ring moves, it squeezes the compression ring, causing it to deform towards the center, indirectly reducing the nozzle diameter and increasing the spray velocity. Furthermore, the isolation telescopic cover and mounting shell prevent gas pressure inside the nozzle from leaking out through the groove, improving the gas pressure utilization rate of the fire extinguisher canister. Since the nozzle is usually held by hand during use, any air leakage or pressure drop could cause the leaked low-temperature gas to come into contact with the user's hands, posing a hazard.

[0019] 2. If site conditions permit, the protective cap can be rotated and disassembled, and then the external gas-proof pipe can be connected to the connecting pipe, so that the external pump can spray high-speed inert gas. The high-speed gas can enter the annular groove through the through groove and then be sprayed out through the convex pipe, so that the low-temperature carbon dioxide that could not be sprayed far due to gradual decompression can be sprayed far again. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the nozzle;

[0022] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0024] Figure 5 This is a schematic diagram of the installation structure of the moving ring and the extrusion ring.

[0025] In the diagram: 1. Nozzle body; 101. Spray pipe; 102. Spray cover; 2. Adjustment component; 201. Mounting shell; 202. Rotating shaft; 203. Knob; 204. First gear; 205. Stud; 206. Second gear; 207. Screw sleeve; 208. Moving block; 209. Isolation telescopic cover; 210. Slide groove; 211. Raised strip; 212. Moving ring; 213. Extrusion ring; 214. Guide plate; 3. Auxiliary component; 301. Ring groove; 302. Raised tube; 303. Through groove; 304. Connecting pipe; 305. Protective cap. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 - Figure 5 The present invention provides a technical solution: a nozzle structure for a handheld fire extinguisher, including a nozzle body 1, a nozzle pipe 101 fixedly connected to one side of the nozzle body 1, and a nozzle cover 102 fixedly connected to one end of the nozzle pipe 101.

[0028] The nozzle 101 is internally equipped with an adjustment component 2 and an auxiliary component 3. The adjustment component 2 includes a mounting shell 201, which is fixed to the top of the nozzle 101. A rotating shaft 202 is rotatably connected to one side of the top of the mounting shell 201. A first gear 204 is fixedly connected to the bottom end of the rotating shaft 202, and a knob 203 is fixedly connected to the top end of the rotating shaft 202. A sealing ring is provided between the rotating shaft 202 and the mounting shell 201. The sealing ring is fixedly sleeved on the outside of the mounting shell 201. A hole is opened on the top of the mounting shell 201, and the sealing ring is embedded in the hole. The elasticity of the rubber sealing ring allows it to rotate in the hole while supplementing the primary airtightness.

[0029] The mounting housing 201 is rotatably connected to a stud 205. The stud 205 is provided with a second gear 206 and a threaded sleeve 207 on its outside. The bottom of the threaded sleeve 207 is fixedly connected to a moving block 208. The outside of the moving block 208 is fixedly connected to an isolation telescopic cover 209. The top of the nozzle 101 is provided with a sliding groove 210. The outside of the moving block 208 is fixedly connected to a protrusion 211.

[0030] The nozzle 101 has a sliding connection to a moving ring 212 inside, and a compression ring 213 is fixedly connected to one side of the moving ring 212. Several guide plates 214 are also fixedly connected inside the nozzle 101. The compression ring 213 is in close contact with the guide plates 214. The guide plates 214 are arranged in a ring inside the nozzle 101.

[0031] The threaded sleeve 207 is slidably connected to the stud 205, the second gear 206 is fixedly connected to the stud 205, and the second gear 206 is meshed with the first gear 204.

[0032] One side of the isolation telescopic cover 209 is fixedly connected to the movable block 208, and the other side of the isolation telescopic cover 209 is fixedly connected to the inner wall of the mounting shell 201; the isolation telescopic cover 209 can form the first layer of airtight protection.

[0033] Both the movable block 208 and the protrusion 211 are slidably connected to the slide groove 210, and the bottom of the movable block 208 is fixedly connected to the protrusion 211.

[0034] One side of the extrusion ring 213 is attached to the guide plate 214, and the other side of the extrusion ring 213 is attached to the inner wall of the nozzle 101. One side of the extrusion ring 213 is provided with a slope, and one side of the guide plate 214 is also provided with a slope. The slopes on both sides can be attached together. The extrusion ring 213 can extrude the guide plate 214 to shrink and deform. The guide plate 214 will deform to its initial state when there is no extrusion.

[0035] The auxiliary component 3 includes an annular groove 301 formed inside the housing of the nozzle 101. Several protruding tubes 302 are fixedly connected inside the nozzle 101. The protruding tubes 302 communicate with the annular groove 301. A through groove 303 is also formed inside the housing of the nozzle 101. The through groove 303 is connected to the annular groove 301. A connecting pipe 304 is provided outside the through groove 303. A protective cap 305 is threadedly connected to the connecting pipe 304. The protruding tubes 302 are arranged obliquely, and the air outlet faces the spray hood (102).

[0036] The through groove 303 is fixedly connected to the outside of the nozzle 101, and the connecting pipe 304 can be threadedly connected to the external fireproof pipe; the auxiliary component 3 is not used when the protective cap 305 is installed.

[0037] Working principle: Before using the nozzle structure of this type of handheld fire extinguisher, it is necessary to check the overall condition of the device to ensure that it can function normally. Figure 1 - Figure 5 As shown, when the gas pressure inside the canister decreases, the first gear 204 rotates by rotating the shaft 202, which in turn drives the second gear 206 to rotate. The second gear 206 drives the threaded sleeve 207 to move horizontally. The horizontal movement of the threaded sleeve 207 causes the isolation telescopic cover 209 to fold and deform. At the same time, the protrusion 211 drives the moving ring 212 to move horizontally inside the nozzle 101. When the moving ring 212 moves, it squeezes the compression ring 213, causing it to deform towards the center, indirectly reducing the spray diameter and increasing the spray velocity. Furthermore, the isolation telescopic cover 209 and the mounting shell 201 can prevent the gas pressure inside the nozzle 101 from leaking from the slide groove 210, improving the gas pressure utilization rate of the fire extinguisher canister. Since the nozzle is usually held by hand during use, if there is air leakage or pressure drop, the leaked low-temperature gas will come into contact with the user's hand, causing harm.

[0038] If on-site conditions permit, the protective cap 305 can be rotated and disassembled, and then the external gas-proof pipe can be connected to the connecting pipe 304, so that the external pump can spray high-speed inert gas. The high-speed gas can enter the annular groove 301 through the through groove 303 and then be sprayed out through the convex pipe 302, so that the low-temperature carbon dioxide that could not be sprayed far due to gradual decompression can be sprayed far again.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nozzle structure of a handheld fire extinguisher, comprising a spray head body (1), one side of the spray head body (1) is fixedly connected with a spray pipe (101), one end of the spray pipe (101) is fixedly connected with a spray cover (102); characterized in that Further comprising: The inside of the spray pipe (101) is provided with an adjusting assembly (2) and an auxiliary assembly (3), the adjusting assembly (2) comprises a mounting shell (201), the mounting shell (201) is fixed to the top of the spray pipe (101), one side of the top of the mounting shell (201) is rotatably connected with a rotating shaft (202), the bottom end of the rotating shaft (202) is fixedly connected with a first gear (204), the top end of the rotating shaft (202) is fixedly connected with a knob (203); Wherein, the inside of the mounting shell (201) is rotatably connected with a stud (205), the outside of the stud (205) is provided with a second gear (206) and a threaded sleeve (207), the bottom of the threaded sleeve (207) is fixedly connected with a moving block (208), the outside of the moving block (208) is fixedly connected with an isolation telescopic cover (209), the top of the spray pipe (101) is provided with a sliding groove (210), the outside of the moving block (208) is fixedly connected with a convex strip (211); Wherein, the inside of the spray pipe (101) is slidably connected with a moving ring (212), one side of the moving ring (212) is fixedly connected with a pressing ring (213), the inside of the spray pipe (101) is also fixedly connected with a plurality of guide plates (214), the pressing ring (213) is connected with the guide plates (214) in close contact.

2. A hand-held fire extinguisher nozzle structure according to claim 1, wherein: The threaded sleeve (207) and the stud (205) are threadedly and slidably connected, the second gear (206) is fixedly connected with the stud (205), and the second gear (206) is meshingly connected with the first gear (204).

3. A hand-held fire extinguisher nozzle structure according to claim 1, wherein: One side of the isolation telescopic cover (209) is fixedly connected with the moving block (208), and the other side of the isolation telescopic cover (209) is fixedly connected with the inner wall of the mounting shell (201).

4. The hand-held fire extinguisher nozzle structure of claim 1, wherein: The moving block (208) and the convex strip (211) are both slidably connected with the sliding groove (210), and the bottom of the moving block (208) is fixedly connected with the convex strip (211).

5. The hand-held fire extinguisher nozzle structure of claim 1, wherein: One side of the pressing ring (213) is in close contact with the guide plate (214), and the other side of the pressing ring (213) is in close contact with the inner wall of the spray pipe (101).

6. A hand-held fire extinguisher nozzle structure according to claim 1, wherein: The auxiliary assembly (3) comprises a ring groove (301) formed in the inside of the shell of the spray pipe (101), a plurality of convex tubes (302) are fixedly connected in the inside of the spray pipe (101), the convex tubes (302) are in communication with the ring groove (301), a through groove (303) is also formed in the shell of the spray pipe (101), the through groove (303) is connected with the ring groove (301), the outside of the through groove (303) is provided with a connecting pipe (304), and the connecting pipe (304) is threadedly connected with a protective cap (305).

7. A hand-held fire extinguisher nozzle structure according to claim 6, wherein: The through groove (303) is fixedly connected with the outside of the spray pipe (101), and the connecting pipe (304) can be threadedly connected with an external flame-resistant gas pipe.

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