A handheld fire extinguisher capable of eliminating fire smoke

Abstract

This invention discloses a handheld fire extinguisher capable of eliminating fire smoke, belonging to the field of fire protection and safety technology. The invention includes a fire extinguisher body, with a spray hose connected to the nozzle. A Hartmann whistle, consisting of a nozzle, a central rod, and a resonant cavity, is located at the end of the spray hose. A horn is located on the outer side of the spray hose's end. The nozzle is fixed to the end of the spray hose. The central rod is located in the middle of the nozzle and extends from the inside of the nozzle to the outside, and is fixed by several support rods. The bottom surface of the resonant cavity is fixedly connected to the bottom of the central rod. The airflow within the fire extinguisher cylinder can not only be used for fire extinguishing but also to generate high-intensity sound waves. These high-intensity sound waves can be focused to eliminate fire smoke and alert surrounding personnel to the presence of a fire and firefighters, facilitating escape and rescue efforts. This invention can quickly and efficiently clear smoke within a 3-5 meter radius. 3 It has a good smoke suppression effect on fire smoke within the space.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting and safety, and in particular to a handheld fire extinguisher capable of eliminating fire smoke. Background Art

[0002] Fire is one of the most frequent natural disasters, and it is extremely destructive, seriously threatening the lives and property of the people. Fires often produce a lot of smoke. Data show that smoke is the most threatening to people at the fire scene, and the number of deaths caused by smoke accounts for about 80% of the total number of deaths.

[0003] The main components of fire smoke are a mixture of combustion products and air, containing a large number of solid particles and droplets, mainly carbon black, with a particle size range of 0.01 ~ 10 μm. The large amount of smoke produced during a fire has a strong light-blocking property, which greatly reduces visibility in the fire scene, making it impossible for people in the fire scene to escape quickly, prolonging their exposure to toxic smoke and high temperatures, and reducing the chance of escape.

[0004] Therefore, effective control of fire smoke is one of the effective ways to reduce casualties and property losses. Common control methods currently include smoke blocking, mechanical smoke exhaust, natural smoke exhaust, pressurized air supply, and water mist spraying. However, the actual effect of smoke blocking is limited, and it is difficult to prevent the spread of smoke; smoke exhaust and air supply may aggravate the spread of fire by providing fresh air; spraying water mist to control fire smoke has a certain effect, but under certain conditions, visibility may deteriorate.

[0005] A fire extinguisher is a portable fire-fighting tool that contains chemicals to put out fires. Fire extinguishers are one of the common fire prevention facilities and are stored in public places or places where fires may occur. Fire extinguishers are essential firefighting equipment and are widely distributed. However, existing fire extinguishers can only put out fires but cannot eliminate smoke, which sometimes seriously affects firefighting and rescue. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention provides a handheld fire extinguisher capable of eliminating fire smoke.

[0007] The technical solution of the present invention is:

[0008] A handheld fire extinguisher capable of eliminating fire smoke comprises a fire extinguisher body, wherein a spray hose is connected to the nozzle of the fire extinguisher body, and the characteristics are: a Hartmann whistle structure is arranged at the tail of the spray hose; and a horn is arranged at the outer side of the tail of the spray hose.

[0009] As a preferred embodiment, the Hartmann whistle structure includes a nozzle, a center rod and a resonance cavity; the nozzle is fixed to the end of the spray hose, the center rod is located in the middle of the nozzle and extends from the inside of the nozzle to the outside of the nozzle, and the center rod is fixed by a plurality of support rods; the bottom surface of the resonance cavity is fixedly connected to the bottom of the center rod.

[0010] The present invention cleverly arranges a Hartmann whistle at the nozzle of an existing fire extinguisher, takes the nozzle as a high-pressure gas outlet, connects the resonance cavity through a central rod, and arranges a horn to emit sound waves with a high sound pressure level, thereby realizing smoke particle agglomeration and achieving a very good effect of eliminating fire smoke.

[0011] As a preferred solution, the fire extinguisher body includes a fire extinguisher cylinder, a pressure gauge and a pressing handle arranged on the top of the fire extinguisher cylinder, and a nozzle connected to the fire extinguisher cylinder. The "fire extinguisher body" is the main part of an existing fire extinguisher.

[0012] As a preferred solution, the ratio of the depth of the resonant cavity to the height of the horn is 1:5 to 1:20. The horn is mainly used to focus the sound waves so that the sound waves are directional. The height of the horn has a better focusing effect on the sound waves within this range.

[0013] As a preferred solution, the ratio of the inlet diameter of the resonance cavity to the outlet diameter of the nozzle is 1.33: 1 to 2.5: 1. Within this ratio range, the sound intensity emitted by the Hartmann whistle is higher.

[0014] As a preferred solution, the resonance cavity is coaxial with the nozzle.

[0015] As a preferred solution, the diameter of the central rod is less than 1 / 3 of the inner diameter of the resonance cavity. In this way, the central rod has a good effect of enhancing the pressure level of the Hartmann whistle.

[0016] As a preferred solution, the diameter of the front section of the horn remains unchanged, and the diameter of the part of the horn located 1 to 2 mm behind the bottom of the resonance cavity increases exponentially. The exponential growth of the diameter of the lower section of the horn can make the sound waves transmit well, and at the same time can specify the direction of sound wave transmission and enhance the intensity of the sound waves in the specified direction.

[0017] As a preferred solution, the ratio of the distance between the nozzle and the resonance cavity to the diameter of the nozzle is 1.5 to 3. In this way, the Hartmann whistle can be in a backflow sounding mode, in which the sound pressure level is high and the sounding frequency band is suitable for the agglomeration of fire smoke particles.

[0018] As a preferred solution, the top of the central rod is in a tapered shape that is narrow at the top and wide at the bottom. This arrangement can reduce the impact of airflow on the central rod.

[0019] As a preferred solution, the top of the side wall of the resonance cavity is provided with an inclined surface, which can reduce the impact of the airflow on the resonance cavity.

[0020] When using the fire extinguisher of the present invention:

[0021] Aim the nozzle of the handheld fire extinguisher that can eliminate fire smoke at the fire area, press the switch, and the gas in the cylinder flows out along the spray hose, accelerates through the nozzle outlet and collides with the bottom of the resonance cavity and the inner wall of the horn, and the airflow vibrates to generate high-intensity sound waves. The high-intensity sound waves aggregate the smoke generated by flame combustion and fire extinguishing, reduce the number of smoke particles, and increase visibility at the fire scene.

[0022] The beneficial effects of the present invention are:

[0023] 1. The airflow in the cylinder of the fire extinguisher of the present invention can not only be used to extinguish fires, but also to generate high-intensity sound waves. High-intensity sound waves can be used to aggregate and eliminate fire smoke, and remind surrounding personnel that there is a fire and fire extinguishers, which is convenient for people to escape from the fire scene and for people to rescue. The fire extinguisher of the present invention can emit high-intensity sound waves with a frequency of 5-10kHz and a sound pressure level of more than 150dB. This sound wave frequency band is very effective in agglomerating fire smoke, and can quickly and efficiently clear the surrounding 3-5m 3 It can effectively eliminate fire smoke in the space.

[0024] 2. The fire extinguisher of the present invention is used for fire fighting and rescue, is easy to carry, has a simple structure, and is suitable for mobile use. In addition, it can be installed or improved on the basis of the existing fire extinguisher, and the operating cost is low.

[0025] 3. The fire extinguisher of the present invention is easy to operate, and the direction of the high-intensity sound waves can be adjusted at will, so as to eliminate smoke in all directions.

[0026] 4. The fire extinguisher of the present invention can be applied to any fire extinguisher with nitrogen or carbon dioxide gas, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a structural schematic diagram of the handheld fire extinguisher capable of eliminating fire and smoke of the present invention;

[0029] Figure 2 The present invention is a schematic structural diagram of the Hartmann whistle in the handheld fire extinguisher capable of eliminating fire and smoke. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0032] Example 1

[0033] like Figure 1 , Figure 2 As shown, the handheld fire extinguisher for eliminating fire and smoke of the present invention comprises a fire extinguisher body, which comprises a cylinder body 1, a pressure gauge 2 and a pressing handle 3 are arranged on the top of the cylinder body 1, a nozzle 4 is arranged on the side of the top of the cylinder body 1, the nozzle 4 is connected to a spray hose 5, and a nozzle 7-1 is arranged at the end of the spray hose 5.

[0034] The barometer 2 displays the pressure in the cylinder. When the push handle 3 is pressed, the gas and fire extinguishing agent in the cylinder 1 are ejected from the nozzle 7-1 through the nozzle 4 and the spray hose 5. The nozzle 7-1 is configured in a tapered shape, which can increase the speed of the gas and fire extinguishing agent flowing through the nozzle 7-1.

[0035] The "fire extinguisher body" is the main part of an existing fire extinguisher. The structure of the fire extinguisher body can also be replaced by other existing types of fire extinguishers.

[0036] A Hartmann whistle structure 7 is provided at the tail of the spray hose 5. In the present embodiment, the Hartmann whistle structure 7 is composed of a nozzle 7-1, a center rod 7-3, a resonant cavity 7-2 and a support rod 7-4; the resonant cavity 7-2 is coaxial with the nozzle 7-1, and the resonant cavity 7-2 is located in the pressure unstable area behind the nozzle 7-1. The center rod 7-3 is fixed by three support rods 7-4. The angle between two adjacent support rods 7-4 is 120°, one end of the support rod 7-4 is fixed to the inner wall of the nozzle 7-1, and the other end is fixed to the center rod 7-3. The center rod 7-3 is located at the position of the central axis of the nozzle 7-1 under the support of the support rod 7-4, and the center rod 7-3 extends from the inside of the nozzle 7-1 to the outside of the nozzle 7-1, and the bottom of the center rod 7-3 is fixedly connected to the resonant cavity 7-2. The center rod 7-3 and the resonant cavity 7-2 can be detachably fixedly connected (such as threaded connection), or can be non-detachably fixedly connected (such as welded connection or integral molding). In order to facilitate the replacement of the resonance cavity 7-2, it is generally arranged in a detachable fixed connection mode, preferably a threaded connection.

[0037] A horn 6 is provided on the outside of the tail of the spray hose 5. In order to prevent particles from sticking to the inner wall of the horn 6, the surface of the horn 6 is smooth. The horn 6 is provided at the tail of the spray hose 5 to specify the direction of sound wave transmission and enhance the intensity of sound waves in the specified direction. The diameter of the upper section of the horn 6 remains unchanged until it exceeds the bottom of the resonance cavity 7-2 by 1-2 mm, and then its diameter increases exponentially. The exponential increase in the diameter of the horn can enable good transmission of sound waves.

[0038] In order to ensure a better effect of eliminating fire smoke, the ratio of the depth of the resonance cavity 7-2 to the height of the horn 6 is 1:5~1:20 (preferably, the ratio of the depth of the resonance cavity 7-2 to the height of the horn 6 is 1:10~1:13); the ratio of the inlet diameter of the resonance cavity 7-2 to the outlet diameter of the nozzle 7-1 is 1.33:1~2.5:1; the diameter of the center rod 7-3 is less than 1 / 3 of the inner diameter of the resonance cavity 7-2, and the ratio of the distance between the nozzle 7-1 and the resonance cavity 7-2 to the diameter of the nozzle 7-1 is 1.5~3.

[0039] When using the handheld fire extinguisher capable of eliminating fire smoke of the present invention, the horn 6 is aimed at the fire area, the handle 3 is pressed downward, and the gas and fire extinguishing agent in the cylinder 1 flow out along the spray hose 5, accelerate through the nozzle 7-1 outlet and collide with the bottom of the resonance cavity 7-2, and the air flow vibrates to generate high-intensity sound waves. The high-intensity sound waves aggregate the smoke generated by the flame combustion and fire extinguishing, reduce the number of smoke particles, and increase visibility at the fire scene.

[0040] Most fire extinguishers contain nitrogen or carbon dioxide. Using these two gases as the working gas of the Hartmann whistle can emit high-intensity sound waves with a frequency of 5~10kHz and a sound pressure level of more than 150dB. This sound wave frequency band is very effective for gathering fire smoke and can quickly and efficiently clear the surrounding 3-5m3 It can effectively eliminate fire smoke in the space.

[0041] Example 2

[0042] On the basis of Example 1, the top end of the center rod 7-3 is configured to be a cone that is narrow at the top and wide at the bottom to reduce the impact of airflow on the center rod.

[0043] Example 3

[0044] On the basis of Example 1, the top surface of the side wall of the resonance cavity 7-2 is set as an inclined surface to reduce the impact of the airflow on the resonance cavity 7-2.

[0045] Example 4

[0046] On the basis of Example 1, the top of the center rod 7-3 is set to be a cone with a narrow top and a wide bottom to reduce the impact of airflow on the center rod. At the same time, the top surface of the side wall of the resonance cavity 7-2 is set to be an inclined surface to reduce the impact of airflow on the resonance cavity 7-2.

[0047] In other embodiments, the Hartmann whistle structure can also be a finished Hartmann whistle of other structural forms, which can be directly installed on the tail end of the existing fire extinguisher spray hose. However, the structure of the present invention directly uses the nozzle as a part of the Hartmann whistle structure as a high-pressure gas outlet, and the structure is simple and not easy to be blocked.

Claims

1. A handheld fire extinguisher capable of eliminating fire smoke, comprising a fire extinguisher body, a spray hose connected to the nozzle of the fire extinguisher body, characterized in that: A Hartmann whistle structure is provided at the tail of the spray hose; a horn is provided on the outer side of the tail of the spray hose; the Hartmann whistle structure includes a nozzle, a center rod and a resonance cavity; the nozzle is fixed to the end of the spray hose, the center rod is located in the middle of the nozzle and extends from the inside of the nozzle to the outside of the nozzle, and the center rod is fixed by a plurality of support rods; the bottom surface of the resonance cavity is fixedly connected to the bottom of the center rod; the ratio of the depth of the resonance cavity to the height of the horn is 1:5 to 1:20; the ratio of the inlet diameter of the resonance cavity to the outlet diameter of the nozzle is 1.33:1 to 2.5:1; the ratio of the distance between the nozzle and the resonance cavity to the diameter of the nozzle is 1.5 to 3.

2. The handheld fire extinguisher capable of eliminating fire smoke as claimed in claim 1, characterized in that: The fire extinguisher body comprises a fire extinguisher cylinder, a pressure gauge and a pressing handle arranged on the top of the fire extinguisher cylinder, and a nozzle connected with the fire extinguisher cylinder.

3. The portable fire extinguisher capable of eliminating fire smoke as claimed in claim 1, characterized in that: The diameter of the central rod is less than 1 / 3 of the inner diameter of the resonance cavity.

4. The portable fire extinguisher capable of eliminating fire smoke as claimed in claim 1, characterized in that: The diameter of the front section of the horn remains unchanged, while the diameter of the portion of the horn located 1 to 2 mm behind the bottom of the resonance cavity increases exponentially.

5. The portable fire extinguisher capable of eliminating fire smoke as claimed in claim 1, characterized in that: The top end of the central rod is in a tapered shape that is narrow at the top and wide at the bottom.

6. The portable fire extinguisher capable of eliminating fire smoke as claimed in claim 1, characterized in that: An inclined surface is arranged on the top of the side wall of the resonance cavity.

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