Nozzle structure of fire extinguisher

Abstract

The utility model relates to the technical field of nozzle structures, in particular to a nozzle structure of a fire extinguisher, which comprises an exhaust pipe internally provided with a gas transmission port communicated with a first surface and a second surface of the exhaust pipe; the covering part is rotatably arranged on the first face of the exhaust pipe, a first air outlet and a second air outlet which are communicated with the first face and the second face of the covering part are formed in the covering part in the circumferential direction of the covering part at intervals, the caliber of the first air outlet is larger than that of the second air outlet, and the caliber of an air conveying opening located in the first face of the exhaust pipe is configured to be smaller than that of the first air outlet and the second air outlet; and the locking mechanism is used for relatively fixing the covering part and the exhaust pipe so as to limit or allow the covering part to move relative to the exhaust pipe. According to the utility model, the covering part is unlocked through the locking mechanism, so that the covering part rotates relative to the exhaust pipe, the smaller gas outlet II is aligned with the gas transmission port, and the gas outlet II is smaller in caliber, so that the gas outlet is suitable for extinguishing small fire; and when the fire behavior is big, the larger gas outlet I is aligned with the gas transmission port, so that the big fire behavior can be more effectively coped with.

Description

Technical Field

[0001] The utility model relates to the technical field of nozzle structures, in particular to a nozzle structure of a fire extinguisher. Background Art

[0002] A fire extinguisher is a common portable fire-fighting tool that contains chemicals for extinguishing fires. It is usually stored in public places or places where fires may occur. The nozzle of the fire extinguisher is an important component of the fire extinguisher. Its function is to spray the fire extinguishing agent near the fire source to achieve the purpose of effective fire extinguishing.

[0003] The existing fire extinguisher nozzle structure is usually an integral structure, and the fire extinguishing gas is ejected to the outside through a nozzle, so as to extinguish the external fire source. However, although this nozzle can extinguish the external fire source well, due to the fixed nozzle area, when the high-pressure gas passes through, a faster flow rate will be formed. Although this helps to quickly cover the fire source, it may also lead to a waste of reagents. Therefore, the utility model aims to provide a fire extinguisher nozzle structure that can adjust the nozzle area, thereby controlling the flow rate and coverage of the fire extinguishing agent. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a fire extinguisher nozzle structure, which can adjust the nozzle area, thereby controlling the flow rate and coverage of the fire extinguishing agent, so as to solve the problem of difficulty in adjusting the nozzle area in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a fire extinguisher nozzle structure, including an exhaust pipe, which is internally configured with an air supply port connecting the first surface and the second surface of the exhaust pipe; a covering portion, which is rotatably arranged on the first surface of the exhaust pipe, and the covering portion is configured with an air outlet 1 and an air outlet 2 connecting the first surface and the second surface of the covering portion at intervals along its circumference, the caliber of the air outlet 1 is larger than that of the air outlet 2, and the caliber of the air supply port located on the first surface of the exhaust pipe is configured to be smaller than that of the air outlet 1 and the air outlet 2; and a locking mechanism, which is used to fix the covering portion relative to the exhaust pipe to limit or allow the covering portion to move relative to the exhaust pipe.

[0006] Optionally, the locking mechanism includes a locking plate, a fixing plate, a locking rod, a limiting portion and a spring, the locking plate being fixed to the peripheral side wall of the covering portion, the fixing plate being L-shaped and fixed to the free end of the locking plate, the locking rod movably passes through the fixing plate and the locking plate, and movably passes through the exhaust pipe and does not extend into the gas delivery port, the limiting portion is fixed on the locking rod, the spring is sleeved on the locking rod, the limiting portion is arranged between the locking plate and the fixing plate, and the spring elastically abuts against the limiting portion.

[0007] Optionally, a plurality of friction-increasing strips are provided at intervals along the circumference of one end of the locking rod away from the exhaust pipe.

[0008] Optionally, the covering portion is provided with a plurality of friction-increasing grooves spaced apart along its circumference.

[0009] Optionally, the diameter of the gas delivery port gradually decreases from the second surface of the exhaust pipe to the first surface of the exhaust pipe.

[0010] Optionally, a plurality of air outlets 3 are arranged at intervals inside the air outlet 1 located on the first surface of the covering portion.

[0011] Compared with the prior art, the utility model provides a fire extinguisher nozzle structure, which has the following beneficial effects:

[0012] The utility model unlocks the cover part through the locking mechanism, so that it rotates relative to the exhaust pipe, so that the smaller gas outlet port 2 is aligned with the gas delivery port. Since the diameter of the gas outlet port 2 is small, the sprayed fire extinguishing agent will be more concentrated, which is suitable for extinguishing small fires; when facing a large fire, the larger gas outlet port 1 is aligned with the gas delivery port. At this time, the flow rate of the sprayed fire extinguishing agent will be larger and the coverage area will be wider, so as to more effectively deal with the large fire;

[0013] The utility model provides a friction increasing strip, and when the user needs to pull out the locking rod, the friction increasing strip can increase the friction force of the user's finger on the locking rod, so as to facilitate pulling out the locking rod;

[0014] The utility model provides the friction increasing groove, and when the user needs to rotate the covering part, the friction increasing groove can increase the friction between the user's palm and the covering part, so that the user can rotate the covering part easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a three-dimensional cutaway structure of the utility model is shown;

[0016] Figure 2 A three-dimensional structural schematic diagram of the utility model is shown;

[0017] Figure 3 A three-dimensional structural schematic diagram of the covering part and the locking mechanism is shown;

[0018] Figure 4 A schematic diagram of the three-dimensional structure of the locking rod is shown.

[0019] In the figure: 1. exhaust pipe; 2. air delivery port; 3. cover part; 4. air outlet 1; 5. air outlet 2; 6. air outlet 3; 7. locking mechanism; 8. locking plate; 9. fixing plate; 10. locking rod; 11. limiting part; 12. spring; 13. friction strip; 14. friction groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: See Figures 1 to 4 According to an embodiment of the utility model, a technical solution is provided: a fire extinguisher nozzle structure, comprising an exhaust pipe 1, internally configured with an air delivery port 2 connecting the first surface and the second surface of the exhaust pipe 1; a cover portion 3, rotatably arranged on the first surface of the exhaust pipe 1, the cover portion 3 having an air outlet 1 4 and an air outlet 2 5 connecting the first surface and the second surface of the cover portion 3 at intervals along its circumference, the air outlet 1 4 having a larger diameter than the air outlet 2 5, and the air delivery port 2 located on the first surface of the exhaust pipe 1 being configured to have a smaller diameter than the air outlet 1 4 and the air outlet 2 5; and a locking mechanism 7, for fixing the cover portion 3 relative to the exhaust pipe 1 to limit or allow the cover portion 3 to move relative to the exhaust pipe 1.

[0022] With the fire extinguisher nozzle structure of the above structure, when the user needs to extinguish a fire, first, in the case of a small fire, unlock the cover part 3 through the locking mechanism 7, and rotate it relative to the exhaust pipe 1 to align the smaller air outlet 25 with the gas supply port 2. Since the diameter of the air outlet 25 is small, the sprayed fire extinguishing agent will be more concentrated, which is suitable for extinguishing small fires; when facing a large fire, align the larger air outlet 14 with the gas supply port 2. At this time, the flow rate of the sprayed fire extinguishing agent will be larger and the coverage area will be wider, so as to more effectively deal with large fires.

[0023] In this embodiment, the locking mechanism 7 includes a locking plate 8, a fixing plate 9, a locking rod 10, a limiting portion 11 and a spring 12. The locking plate 8 is fixed to the peripheral side wall of the cover portion 3. The fixing plate 9 is L-shaped and fixed to the free end of the locking plate 8. The locking rod 10 movably penetrates the fixing plate 9 and the locking plate 8, and movably penetrates the exhaust pipe 1, and does not extend into the gas delivery port 2. The limiting portion 11 is fixed on the locking rod 10, and the spring 12 is sleeved on the locking rod 10. The limiting portion 11 is provided between the locking plate 8 and the fixing plate 9. The spring 12 elastically abuts the limiting portion 11 between the fixed plates 9; when the user needs to relatively fix the covering portion 3 and the exhaust pipe 1 or release the relatively fixed state, first, by pulling out the locking rod 10, the locking rod 10 no longer penetrates the exhaust pipe 1, so as to release the relatively fixed state between the covering portion 3 and the exhaust pipe 1, and then, by loosening the locking rod 10, the locking rod 10 is elastically abutted by the spring 12, so that the locking rod 10 can move through the exhaust pipe 1, so as to relatively fix the covering portion 3 and the exhaust pipe 1.

[0024] In this embodiment, a plurality of friction strips 13 are provided at intervals along the circumference of the end of the locking rod 10 away from the exhaust pipe 1; when the user needs to pull out the locking rod 10, the friction strips 13 will increase the friction of the user's fingers on the locking rod 10, making it easier to pull out the locking rod 10.

[0025] In this embodiment, the covering part 3 is provided with a plurality of friction-increasing grooves 14 at intervals along its circumference; when the user needs to rotate the covering part 3, the friction-increasing grooves 14 will increase the friction between the user's palm and the covering part 3, so as to facilitate the user to rotate the covering part 3.

[0026] In this embodiment, the diameter of the gas supply port 2 gradually decreases from the second side of the exhaust pipe 1 to the first side of the exhaust pipe 1; the gradually decreasing diameter is helpful to form a certain pressure gradient during the gas flow process. When the gas flows from the second side (usually the side with a larger opening) to the first side (the side with a smaller opening), the gas flow rate will increase, and the pressure will decrease accordingly, which is conducive to the fire extinguishing gas to be discharged from the exhaust pipe 1 more smoothly.

[0027] In this embodiment, a plurality of air outlets 3 6 are arranged in the air outlet 1 4 on the first surface of the cover portion 3. When a large amount of fire extinguishing gas is released rapidly in a short time, a large noise may be generated, and the dispersion effect of the air outlet 3 6 can effectively reduce the noise, making the use of the fire extinguisher quieter and more comfortable.

[0028] Working principle: when the user needs to extinguish a fire, first, in the case of a small fire, by pulling out the locking rod 10, the locking rod 10 no longer penetrates the exhaust pipe 1, so as to release the relatively fixed state between the cover 3 and the exhaust pipe 1, and rotate it relative to the exhaust pipe 1, so that the smaller air outlet 25 is aligned with the gas supply port 2. Since the diameter of the air outlet 25 is small, the sprayed fire extinguishing agent will be more concentrated, which is suitable for extinguishing small fires; when facing a large fire, align the larger air outlet 14 with the gas supply port 2. At this time, the flow rate of the sprayed fire extinguishing agent will be larger and the coverage will be wider, so as to deal with large fires more effectively; when the user needs to pull out the locking rod 10, the friction strip 13 will increase the friction between the user's finger and the locking rod 10, so as to facilitate the pulling out of the locking rod 10; when the user needs to rotate the cover part 3, the friction increasing groove 14 will increase the friction between the user's palm and the cover part 3, so as to facilitate the user to rotate the cover part 3; the gradually decreasing diameter is helpful to form a certain pressure gradient in the gas flow process. When the gas flows from the second side (usually the side with a larger opening) to the first side (the side with a smaller opening), the gas flow rate will increase, and the pressure will decrease accordingly, which is conducive to the smoother discharge of the fire extinguishing gas from the exhaust pipe 1; when a large amount of fire extinguishing gas is released rapidly in a short time, a large noise may be generated, and the dispersion effect of the gas outlet three 6 can effectively reduce this noise, making the use of the fire extinguisher quieter and more comfortable.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire extinguisher nozzle structure, characterized in that: include: An exhaust pipe (1) having an internal structure with a gas delivery port (2) communicating with a first surface and a second surface of the exhaust pipe (1); A cover portion (3) rotatably disposed on the first surface of the exhaust pipe (1); a first air outlet (4) and a second air outlet (5) are configured on the cover portion (3) along its circumferential direction to communicate with the first surface and the second surface of the cover portion (3); the diameter of the first air outlet (4) is larger than that of the second air outlet (5); and the diameter of the gas delivery port (2) located on the first surface of the exhaust pipe (1) is configured to be smaller than that of the first air outlet (4) and the second air outlet (5); and A locking mechanism (7) is used to fix the covering portion (3) and the exhaust pipe (1) relative to each other, so as to limit or allow the covering portion (3) to move relative to the exhaust pipe (1).

2. A fire extinguisher nozzle structure according to claim 1, characterized in that: The locking mechanism (7) comprises a locking plate (8), a fixing plate (9), a locking rod (10), a limiting portion (11) and a spring (12); the locking plate (8) is fixed on the peripheral side wall of the covering portion (3); the fixing plate (9) is L-shaped and fixed to the free end of the locking plate (8); the locking rod (10) movably penetrates the fixing plate (9) and the locking plate (8) and movably penetrates the exhaust pipe (1) and does not extend into the gas delivery port (2); the limiting portion (11) is fixed on the locking rod (10); the spring (12) is sleeved on the locking rod (10); the limiting portion (11) is arranged between the locking plate (8) and the fixing plate (9); and the spring (12) elastically abuts against the limiting portion (11).

3. A fire extinguisher nozzle structure according to claim 2, characterized in that: A plurality of friction-increasing strips (13) are provided at intervals along the circumference of one end of the locking rod (10) away from the exhaust pipe (1).

4. A fire extinguisher nozzle structure according to claim 1, characterized in that: The covering portion (3) is provided with a plurality of friction-increasing grooves (14) at intervals along its circumference.

5. A fire extinguisher nozzle structure according to claim 1, characterized in that: The diameter of the gas delivery port (2) gradually decreases from the second surface of the exhaust pipe (1) to the first surface of the exhaust pipe (1).

6. A fire extinguisher nozzle structure according to claim 1, characterized in that: A plurality of air outlets 3 (6) are arranged at intervals inside the air outlet 1 (4) located on the first surface of the covering portion (3).

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