CN113398519A - Air-assisted water curtain and water mist composite spraying device - Google Patents
Air-assisted water curtain and water mist composite spraying device Download PDFInfo
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- CN113398519A CN113398519A CN202110550143.XA CN202110550143A CN113398519A CN 113398519 A CN113398519 A CN 113398519A CN 202110550143 A CN202110550143 A CN 202110550143A CN 113398519 A CN113398519 A CN 113398519A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
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- Business, Economics & Management (AREA)
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
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Abstract
The invention discloses an air-assisted water curtain and water mist composite injection device, which comprises an air inlet pipe, a spray head and a gas-liquid mixing cap, wherein the spray head is arranged on the air inlet pipe; the air inlet pipe is arranged inside the spray head; the air inlet pipe is hollow and is communicated up and down to form an air inlet cavity, and one end of the air inlet cavity is communicated with the air supply pipeline; a liquid inlet cavity is arranged in the lower part of the spray head, a plurality of water curtain spraying grooves communicated with the liquid inlet cavity are formed in the side part of the spray head, a liquid flow passage with an inlet communicated with the liquid inlet cavity and a gas spraying opening communicated with the other end of the gas inlet cavity are formed in the upper part of the spray head; the gas-liquid mixing cap is arranged at the top of the spray head, and a plurality of water mist spray holes are formed in the gas-liquid mixing cap at intervals in the circumferential direction; the inside cavity of gas-liquid mixing cap forms the gas-liquid mixing chamber. The invention has the beneficial effects that: the water curtain spraying groove sprays a water curtain to cover the surface of the protection target for cooling; the water mist spraying holes spray water mist formed by high-speed airflow from the water mist spraying holes to cover a fire area, and the fire is extinguished and re-combustion is prevented by means of the fine water mist, so that multiple fire extinguishment is realized.
Description
Technical Field
The invention relates to a spraying device, in particular to an air-assisted water curtain and water mist composite spraying device.
Background
The high frequency and great hazard of the fire seriously threatens public safety and social development, so enough fire fighting equipment needs to be equipped to deal with the fire. The specific heat capacity of water is large, when water flows through the surface of a high-temperature object, the temperature of the object can be rapidly and obviously reduced due to the evaporation heat absorption and convection heat exchange effects of the water, so that the temperature of the object is lower than an ignition point, and the combustion process is inhibited; the fog particle diameter of water smoke is little, and when a certain region breaks out a fire, the boiling heat transfer and the heat convection effect through fine water smoke can play the cooling effect, and the specific surface area of fine water smoke is big in addition, can vaporize rapidly after the heat absorption, and the volume sharply increases, forms the barrier around flame, prevents the air admission, plays the effect of stifling and putting out a fire. Therefore, on the outer wall of an object or inflammable matter to be protected, the effects of preventing fire spreading, extinguishing fire and preventing re-combustion can be achieved by spraying a water curtain to the high-temperature inflammable wall surface and spraying water mist to a fire area and utilizing the cooling and flame-retardant functions of the water curtain and the cooling and suffocation functions of the water mist; however, the single water curtain fire extinguishing technology depends on forming a water curtain on the surface of a wall surface and the like, so that the protection target temperature is reduced, and the large water flood irrigation mode has great resource waste and cannot be used in precise electronic equipment occasions.
At present, most of the existing related spraying equipment only has the function of single water mist fire extinguishing or single water curtain fire extinguishing, for example, a fire-fighting nozzle with the publication number of CN207203271U extinguishes fire by spraying water mist; a high-pressure water mist fire extinguishing nozzle capable of spraying at fixed points for fire fighting with publication number CN209060429U also sprays water mist under the action of high pressure to extinguish fire, and an automatic fire extinguishing nozzle for fire fighting with publication number CN208017982U disclose a structure, so that the sprayed water curtain has a wider coverage range. Therefore, it is particularly necessary to design a spraying device which can spray water curtain and water mist simultaneously to extinguish fire.
Disclosure of Invention
The invention aims to provide an air-assisted water curtain and water mist composite spraying device which can simultaneously spray a water curtain and water mist to carry out fire extinguishing operation in order to overcome the defects of the prior art.
The technical scheme adopted by the invention is as follows: an air-assisted water curtain and water mist composite injection device comprises an air inlet pipe, a spray head and a gas-liquid mixing cap; the air inlet pipe is arranged inside the spray head; the air inlet pipe is hollow and is communicated up and down to form an air inlet cavity, and one end of the air inlet cavity is communicated with the air supply pipeline; a liquid inlet cavity is arranged in the lower part of the spray head, a plurality of water curtain spraying grooves communicated with the liquid inlet cavity are formed in the side part of the spray head, a liquid flow passage with an inlet communicated with the liquid inlet cavity and a gas spraying opening communicated with the other end of the gas inlet cavity are formed in the upper part of the spray head; the gas-liquid mixing cap is arranged at the top of the spray head, and a plurality of water mist spray holes are formed in the gas-liquid mixing cap at intervals in the circumferential direction; the inside cavity of gas-liquid mixing cap forms the gas-liquid mixing chamber, and the gas-liquid mixing chamber communicates with gas jet orifice, the export of liquid runner and water smoke jet orifice respectively.
According to the scheme, the liquid flow channel is a cylindrical flow channel, the axis of the liquid flow channel is intersected with the axis extension line of the spray head, and the included angle of the axis extension line and the axis extension line is 10-30 degrees.
According to the scheme, the air inlet pipe, the gas-liquid mixing cap and the spray head are coaxial, and the diameter of the gas jet orifice is not larger than that of the air inlet cavity.
According to the scheme, a nozzle sealing groove is formed in the joint surface of the nozzle and the gas-liquid mixing cap, and a nozzle sealing ring is installed in the nozzle sealing groove.
According to the scheme, the joint surface of the air inlet pipe and the spray head is provided with an air inlet pipe sealing groove, and an air inlet pipe sealing ring is arranged in the air inlet pipe sealing groove.
According to the scheme, the gas-liquid mixing cap is of a hemispherical structure, and the spray head is of a revolving body structure.
According to the scheme, the spray head, the gas-liquid mixing cap and the gas inlet pipe are all made of corrosion-resistant metal materials.
The invention has the beneficial effects that:
1) according to the invention, the side surface of the spray head is provided with the water curtain injection groove, and the water curtain injected by the water curtain injection groove covers the surface of the protection target, so that the temperature of the protection target is reduced and the combustion is prevented; the water mist spraying holes are designed, water mist formed by high-speed airflow is sprayed out of the water mist spraying holes to cover a fire area, and the fire can be quickly and effectively extinguished and re-ignition can be prevented by virtue of the cooling, suffocation and other actions of the water mist; in addition, the gas jet is arranged, and the jetted high-speed gas flow is easier to mix with the surrounding water flow in the gas-liquid mixing cap and break the water flow to form uniform and consistent water mist particles, so that multiple fire extinguishing functions are achieved;
2) the hemispherical surface of the gas-liquid mixing cap is provided with the plurality of water mist spraying holes along the radius direction, and the water mist sprayed out of the spraying holes can cover 360 degrees, so that the water mist can be covered in all directions, and the fire extinguishing is facilitated;
3) the invention has simple structure and few parts, can form water curtain and water mist only by providing water source and air source, is suitable for fire protection of buildings and important equipment, is also suitable for various fields such as coal mine dust removal, infrared stealth and the like, and has good economic benefit and social benefit.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of the present embodiment.
Fig. 3 is a working schematic diagram of the present embodiment.
Fig. 4 is a schematic diagram of the working state of the embodiment.
Wherein: 1-gas-liquid mixing cap, 12-water mist spraying hole, 13-gas-liquid mixing cavity, 2-nozzle, 22-water curtain spraying groove, 24-gas spraying hole, 25-nozzle sealing groove, 26-liquid flow channel, 27-liquid inlet cavity, 3-gas inlet pipe, 31-gas inlet pipe sealing groove, 32-gas inlet cavity, 4-nozzle sealing ring and 5-gas inlet pipe sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
An air-assisted water curtain and water mist composite injection device as shown in fig. 1 and 2 comprises an air inlet pipe 3, a spray head 2 and an air-liquid mixing cap 1; the air inlet pipe 3 is arranged inside the spray head 2, and the upper part of the air inlet pipe 3 is in threaded connection with the spray head 2; the air inlet pipe 3 is hollow and is vertically communicated to form an air inlet cavity 32, and one end of the air inlet cavity 32 is communicated with an air supply pipeline; a liquid inlet cavity 27 is arranged in the lower part of the spray head 2, a plurality of water curtain spray grooves 22 communicated with the liquid inlet cavity 27 are formed in the side part of the spray head 2, a liquid flow passage 26 with an inlet communicated with the liquid inlet cavity 27 and a gas spray opening 24 communicated with the other end of the gas inlet cavity 32 are formed in the upper part of the spray head 2; the gas-liquid mixing cap 1 is arranged at the top of the spray head 2 (can be in threaded connection), and a plurality of water mist spray holes 12 are circumferentially arranged on the gas-liquid mixing cap at intervals; the gas-liquid mixing cap 1 is hollow inside to form a gas-liquid mixing cavity 13, and the gas-liquid mixing cavity 13 is respectively communicated with a gas jet orifice 24, an outlet of a liquid flow passage 26 and a water mist jet orifice 12. The gas and the liquid are mixed in the gas-liquid mixing cap 1, and the liquid is broken into mist drops in the gas-liquid mixing cap 1 and then sprayed out from the spray opening to form water mist.
Preferably, the gas inlet pipe 3, the gas-liquid mixing cap 1 and the nozzle 2 are coaxial, and the diameter of the gas injection port 24 is not larger than that of the gas inlet cavity 32.
Preferably, the liquid flow channel 26 is a cylindrical flow channel, the axis of the liquid flow channel 26 intersects with the extension line of the axis of the spray head 2 (at the gas-liquid mixing cap 1, the axis of the liquid flow channel 26 inclines towards the axis of the spray head 2), and the included angle between the axis of the liquid flow channel 26 and the extension line is 10-30 degrees, so that the liquid flowing out of the liquid flow channel 26 has a certain radial speed, and the gas and the liquid are conveniently and fully mixed.
Preferably, the gas-liquid mixing cap 1 is a hemispherical structure, and the water mist spraying holes 12 are circumferentially arranged on the hemispherical surface at intervals, as shown in fig. 1, so that the water mist sprayed from the spraying holes can cover 360 degrees, and the water mist can be covered in all directions; the aperture of the water mist spraying hole 12 is 1-4 mm.
In the invention, the spray head 2 is a revolving body structure. The spray head 2, the gas-liquid mixing cap 1 and the gas inlet pipe 3 are all made of corrosion-resistant metal materials, and stainless steel alloy is preferred.
Preferably, a nozzle sealing groove 25 is formed in a joint surface of the nozzle 2 and the gas-liquid mixing cap 1, and a nozzle sealing ring 4 is installed in the nozzle sealing groove 25 to prevent liquid leakage.
Preferably, an air inlet pipe sealing groove 31 is formed in a joint surface of the air inlet pipe 3 and the spray head 2, and an air inlet pipe sealing ring 5 is installed in the air inlet pipe sealing groove 31 to prevent air leakage.
In this embodiment, as shown in fig. 3, liquid enters the nozzle 2 from the liquid inlet cavity 27, and gas enters the gas inlet pipe 3 from the gas inlet cavity 32; a plurality of water curtain injection grooves 22 are formed in the side face of the spray head 2, and part of liquid is sprayed out of the side face of the spray head 2 through the water curtain injection grooves 22 to form a water curtain; the rest liquid flows into the gas-liquid mixing cavity 13 through the liquid flow channel 26, the gas flows into the gas-liquid mixing cavity 13 through the gas injection port 24 after entering from the gas inlet cavity 32, the gas and the liquid are sufficiently contacted and mixed in the gas-liquid mixing cavity 13, and the liquid is torn and broken into fine water mist drops under the action of high-speed airflow; the gas-liquid mixture is sprayed out from the water mist spraying holes 12, and fine water mist drops are contacted with air for secondary crushing to form fine water mist particles.
As shown in fig. 4, when the device works normally, the compound injection device pushes out the surface of the protection target by the telescopic mechanism to provide rated water pressure and air pressure for the device, and the spray head 2 injects water curtain and water mist to cover the protection target. When the compound injection device does not work, the compound injection device is retracted into the surface of the protection target by the telescopic mechanism.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. An air-assisted water curtain and water mist composite injection device is characterized by comprising an air inlet pipe, a spray head and a gas-liquid mixing cap; the air inlet pipe is arranged inside the spray head; the air inlet pipe is hollow and is communicated up and down to form an air inlet cavity, and one end of the air inlet cavity is communicated with the air supply pipeline; a liquid inlet cavity is arranged in the lower part of the spray head, a plurality of water curtain spraying grooves communicated with the liquid inlet cavity are formed in the side part of the spray head, a liquid flow passage with an inlet communicated with the liquid inlet cavity and a gas spraying opening communicated with the other end of the gas inlet cavity are formed in the upper part of the spray head; the gas-liquid mixing cap is arranged at the top of the spray head, and a plurality of water mist spray holes are formed in the gas-liquid mixing cap at intervals in the circumferential direction; the inside cavity of gas-liquid mixing cap forms the gas-liquid mixing chamber, and the gas-liquid mixing chamber communicates with gas jet orifice, the export of liquid runner and water smoke jet orifice respectively.
2. The composite spraying device according to claim 1, wherein the liquid flow passage is a cylindrical flow passage, and an axis of the liquid flow passage intersects with an extension line of an axis of the spraying head at an included angle of 10 to 30 °.
3. The compound injection apparatus of claim 1, wherein the gas inlet pipe, the gas-liquid mixing cap, and the nozzle are coaxial, and the diameter of the gas injection orifice is not greater than the diameter of the gas inlet chamber.
4. The composite injection device as claimed in claim 1, wherein a nozzle sealing groove is formed at a joint surface of the nozzle and the gas-liquid mixing cap, and a nozzle sealing ring is installed in the nozzle sealing groove.
5. The composite injection device of claim 1, wherein a joint surface of the inlet pipe and the nozzle is provided with an inlet pipe sealing groove, and an inlet pipe sealing ring is installed in the inlet pipe sealing groove.
6. The compound injection apparatus as defined in claim 1, wherein the gas-liquid mixing cap has a hemispherical structure and the injection head has a revolved body structure.
7. The compound injection apparatus as defined in claim 1, wherein the nozzle, the gas-liquid mixing cap, and the gas inlet pipe are made of corrosion-resistant metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110550143.XA CN113398519A (en) | 2021-05-20 | 2021-05-20 | Air-assisted water curtain and water mist composite spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110550143.XA CN113398519A (en) | 2021-05-20 | 2021-05-20 | Air-assisted water curtain and water mist composite spraying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113398519A true CN113398519A (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110550143.XA Pending CN113398519A (en) | 2021-05-20 | 2021-05-20 | Air-assisted water curtain and water mist composite spraying device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732885A (en) * | 1994-10-07 | 1998-03-31 | Spraying Systems Co. | Internal mix air atomizing spray nozzle |
| US20050011652A1 (en) * | 2003-07-17 | 2005-01-20 | Jinsong Hua | Spray head and nozzle arrangement for fire suppression |
| WO2012141595A1 (en) * | 2011-04-12 | 2012-10-18 | Prevent Systems As | A fire-fighting extinguisher nozzle; a method for fabricating such nozzle, and a method for producing a spray of fine-droplet mist |
| US20140332606A1 (en) * | 2011-12-19 | 2014-11-13 | Nozzle Network Co., Ltd | Liquid atomizing device and liquid atomizing method |
| CN107631662A (en) * | 2017-10-31 | 2018-01-26 | 华中科技大学 | A kind of composite spray jet head of water curtain and water smoke |
| CN111468319A (en) * | 2020-03-20 | 2020-07-31 | 中航光电科技股份有限公司 | Multi-jet-hole gas-liquid two-phase atomizing nozzle |
-
2021
- 2021-05-20 CN CN202110550143.XA patent/CN113398519A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5732885A (en) * | 1994-10-07 | 1998-03-31 | Spraying Systems Co. | Internal mix air atomizing spray nozzle |
| US20050011652A1 (en) * | 2003-07-17 | 2005-01-20 | Jinsong Hua | Spray head and nozzle arrangement for fire suppression |
| WO2012141595A1 (en) * | 2011-04-12 | 2012-10-18 | Prevent Systems As | A fire-fighting extinguisher nozzle; a method for fabricating such nozzle, and a method for producing a spray of fine-droplet mist |
| US20140332606A1 (en) * | 2011-12-19 | 2014-11-13 | Nozzle Network Co., Ltd | Liquid atomizing device and liquid atomizing method |
| CN107631662A (en) * | 2017-10-31 | 2018-01-26 | 华中科技大学 | A kind of composite spray jet head of water curtain and water smoke |
| CN111468319A (en) * | 2020-03-20 | 2020-07-31 | 中航光电科技股份有限公司 | Multi-jet-hole gas-liquid two-phase atomizing nozzle |
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Application publication date: 20210917 |
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| RJ01 | Rejection of invention patent application after publication |