CN209967489U

CN209967489U - Double-channel low-pressure fluid atomization spray head

Info

Publication number: CN209967489U
Application number: CN201920576650.9U
Authority: CN
Inventors: 刘芝; 杨瑞; 张辉; 赵波; 李聪
Original assignee: Hangzhou Rui Yan Technology Co Ltd
Current assignee: Hangzhou Rui Yan Technology Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-01-21
Anticipated expiration: 2029-04-25

Abstract

The utility model provides a binary channels low pressure fluid atomizer, this shower nozzle includes at least: gas passage, liquid passage, gyration cavity and water smoke export belong to the fire control field, relate to a high efficiency, energy-conserving, environmental protection's fire control shower nozzle. This shower nozzle can become the fine particle with liquid atomization to realize the low energy consumption high efficiency atomizing of liquid, realize the function of putting out a fire and its with low costs, fire control effect is good.

Description

Double-channel low-pressure fluid atomization spray head

Technical Field

The utility model belongs to the fire control field relates to a high-efficient, energy-conserving, environmental protection's fire control shower nozzle, especially relates to a shower nozzle structure that enables the high-efficient atomizing of liquid.

Background

Fire safety is always a field of great concern of the state, and a fire often brings great property loss and personal injury to human beings. It is well known that there are three basic elements in the fire: a combustible; the temperature reaches the ignition point; there is sufficient combustion supporting gas, such as oxygen. Only if the three conditions are met simultaneously can the combustible material be combusted. To extinguish a fire, one of the three elements must be destroyed.

The current traditional fire extinguishing system designs mainly include the following:

1. most commonly adopted is a water spraying system, most buildings are installed and used, the system needs to consume a large amount of water resources, equipment is often seriously damaged after being soaked by water due to large water flow, and particularly important electrical equipment in places such as a machine room and the like is short-circuited after being soaked by water, so that various circuit faults are caused, or a database is seriously lost, and the like.

2. There is also a spray system for extinguishing fire with high efficiency, in which a haloalkane compound is pressurized and pressed into a container, and is sprayed from a nozzle by pressure in use to be rapidly changed into steam by combustion heat. The fire extinguishing agent mainly achieves the purpose of extinguishing fire by stopping combustion through inhibiting the chemical reaction process of combustion, and the fire extinguishing agent has the effect of being completed by taking away active substances in the combustion chain reaction, wherein the process is called a chain breaking process and an inhibiting process and is similar to the action of a dry powder fire extinguishing agent. However, the haloalkane fire extinguishing agent is also being eliminated because of the damage to the atmospheric ozone layer and the increasing environmental problem.

3. The application range of the water mist fire extinguishing is continuously expanded due to the potential advantages of the water mist fire extinguishing to the environment, the water mist fire extinguishing is an encouraging result, and researches on application of water mist to extinguishment of various fires are more and more flourishing at home and abroad in recent years.

The water mist achieves the purposes of controlling fire, suppressing fire and extinguishing fire under the triple effects of cooling, suffocation and thermal radiation blocking, and the water mist fire extinguishing system has the cooling effect of a water spraying system and the suffocation effect of a gas fire extinguishing system, so that the water mist fire extinguishing system is a very good fire extinguishing technology which is worthy of popularization.

At present, a high-pressure water mist fire extinguishing system is put into use, the particle size of water mist reaches below 100 micrometers, the fire extinguishing effect is good, but the system needs high pressure to break up water for atomization, the pressure usually needs 10-16 MPa, the requirements on the whole system and a pump set are high, the construction of the ultra-high pressure system has great potential safety hazards to buildings and active personnel, and the construction cost is also high.

Problem to prior art existence, the utility model provides a binary channels low pressure fluid atomizer can high-efficiently put out a fire, and system safety easily realizes again simultaneously, and used raw and other materials environmental protection is harmless moreover, the consumption is few.

Disclosure of Invention

The utility model discloses a realize through following technical scheme: a dual channel, low pressure fluid atomizer comprising: the gas injection pipe is of a Laval structure, and the liquid injection pipe is of a reducing structure with gradually reduced inner diameter; the gas output from the rotary cavity and the liquid output from the liquid spray pipe are mixed in a slit with the width of 0.1-5mm and then are sprayed out from the water mist outlet.

Furthermore, the spray head comprises a cylindrical base body, a water mist outlet is formed in the side wall of the base body, at least one gas channel with a Laval structure and a liquid channel with a reducing structure are arranged in the base body, a rotary cavity is formed in the base body, and a slit with the thickness of 0.1-5mm is formed between the lower end of the liquid channel and the rotary cavity.

Further, the gas channel is located in front of the rotary cavity, and the liquid channel is located outside the gas channel.

Further, the section of the rotary cavity is rectangular or circular.

Further, the spray head further comprises an air inlet pipe and a liquid inlet pipe, wherein the air inlet pipe is connected with the gas channel, and the liquid inlet pipe is connected with the liquid channel.

The utility model discloses beneficial effect who has: the gas pipeline adopts a Laval structure capable of generating supersonic airflow, a rotary cavity of a Helmholtz resonant cavity structure capable of enabling the supersonic airflow to generate high-frequency resonance energy, and a liquid pipeline with a pipe reducing structure, and the high-frequency vibration energy of the supersonic airflow is utilized to atomize liquid into fine particles, so that the low-energy-consumption high-efficiency atomization of the liquid is realized, and the function of fire extinguishment is realized. The nozzle can generate supersonic airflow with high-frequency vibration energy only by low-pressure gas of 0.3-0.5MPa, and can atomize droplet particles with the diameter of about 40-80 mu m by combining low-pressure liquid of 0-0.3 MPa; the cost of the mist-shaped liquid drops generated by the spray head is low, and the fire extinguishing effect is optimal. Meanwhile, through the change of pressure combination, the spray head generates droplet sizes and atomization ranges under different requirements, and is used for fire extinguishing requirements of different occasions. Meanwhile, the double-channel low-pressure fluid atomizing nozzle has high reliability, and the whole atomizing performance is not influenced even if local parts are blocked, so that the nozzle has low requirements on water quality, common conventional water sources can be directly used without special filtration, the nozzle is suitable for aviation, ocean and field environments except for land buildings, and simultaneously, a movable system and a fixed system can be used.

Drawings

Fig. 1 is a schematic structural view of the sprinkler head of the present invention;

FIG. 2 is a sectional view of the nozzle of the present invention;

fig. 3 and 4 are sectional views of the expanded structure of the nozzle of the present invention;

fig. 5 is a schematic diagram of an embodiment of the present invention.

Detailed Description

The utility model relates to a binary channels low pressure fluid atomizer, this shower nozzle includes at least: the gas spraying pipe is of a Laval structure, and the liquid spraying pipe is of a reducing structure with gradually reduced inner diameter; the gas jet pipe injects gas into the rotary cavity, the high-frequency energy is generated by the resonance of the rotary cavity, the supersonic airflow with high-frequency vibration energy atomizes the passing liquid film into countless fine fog-shaped particles in a slit with the width of 0.1-5mm, and the water fog carried by the gas is ejected out through the water fog outlet, an annular water fog area is formed around the area, the coverage range is wide, the diffusion effect is strong, and the gas jet pipe can be used for extinguishing peripheral fire.

The gas molecular resonance is realized by a rotary cavity, for example, the gas molecular resonance can be realized by a helmholtz resonant cavity structure; the helmholtz resonator structure may have a rectangular, circular, etc. cross-section.

The utility model discloses in, the field of technical personnel only need simply set up gas nozzle export and gyration cavity open-ended position, can realize that gas nozzle pours into gas into to gyration cavity.

Similarly, the position of the rotary cavity, the outlet of the liquid nozzle and the water mist outlet can be set by those skilled in the art without any doubt, so that the gas output from the rotary cavity is mixed with the liquid output from the liquid nozzle and is sprayed out from the water mist outlet. The liquid ejection position is changed to match the optimal atomization area with the high-frequency energy area of the air flow, and the liquid outlet is opposite to the negative pressure area formed by the air flow.

In the utility model, the gas jet pipe with the Laval structure is adopted to accelerate the gas, and the gas jet pipe is reduced in diameter and then expanded according to the Laval pipe principle, or the gas jet pipe is reduced in diameter to accelerate the gas flow; the gas inlet pipe only needs to provide a low pressure condition of 0.3-0.5MPa, and the gas flows into the gas spray pipe, and is accelerated through the Laval structure with the contraction and expansion first to generate supersonic airflow above 2 Ma. The specific structure of the gas nozzle is not limited to the structure shown in fig. 2, the gas is gas which does not support combustion, inert gas such as nitrogen is generally adopted, the nitrogen is the main component in the air, the resource is rich and easy to obtain, the natural environment is not harmful, and other gaseous resources can be selected.

The utility model discloses a throat reducing structure that the internal diameter gradually diminishes accelerates liquid, adjusts the liquid outlet position simultaneously, and the feed liquor pipe only needs to provide 0-0.3 MPa's fluid pressure, and liquid just can be from inhaling the inflow liquid spray tube, and this shower nozzle can directly connect the water tank, perhaps inserts current municipal tap water or fire-fighting water and can use, and does not need additionally to install supercharging equipment. The liquid is sprayed out in a ring film shape after passing through a necking reducing structure at the tail end of the liquid spray pipe. The liquid is generally water, is rich and easily obtained in resources, easy to store and transport, environment-friendly and harmless, and can also be other liquid resources.

The gas output by the rotary cavity and the liquid output by the liquid spray pipe are mixed in a slit with the width of 0.1-5mm, the optimal resonance generating distance is 0.1-5mm, and the high-frequency resonance energy generated by the gas flow below or above the range is weakened.

Fig. 1, 2 are the concrete structure of realizing the utility model, but not limited to this, and this atomizer includes columniform base member 1, open 1 lateral wall of base member has water smoke export 7, has at least gas passage 4 and the liquid passage 5 of throat reducing structure of a laval structure in the base member 1 to and helmholtz resonator structure's gyration cavity 6. A slit of 0.1-5mm is arranged between the lower end of the liquid channel 5 and the rotary cavity 6. In fig. 2, the gas channel 4 is located in front of the rotary cavity 6, the liquid channel 5 is located outside the gas channel 4, and the section of the rotary cavity 6 is rectangular. The structure schematic diagram of fig. 1 further includes an air inlet pipe 3 and a liquid inlet pipe 2, the air inlet pipe 3 is connected with the gas channel 4, and the liquid inlet pipe 2 is connected with the liquid channel 5. The gas is accelerated in the channel of the Laval structure, and is sprayed to the rotary cavity 6 and then turns suddenly, a negative pressure area is generated in the cavity, the negative pressure area can generate 17-25kHz high-frequency vibration energy, the energy can atomize the liquid flowing out of the liquid pipeline 5 into superfine fog drops in the slit, and the airflow carries the water mist to be sprayed out through the water mist outlet 7.

The construction of the atomizer head shown in fig. 3 differs from that of fig. 2 in that the cross-section of the rotary chamber 6 with the helmholtz resonator construction is spherical.

The specific structure of the water mist outlet is not limited to the structure shown in fig. 2, and the water mist is sprayed in different angles and ranges by changing the angular direction of the two-channel low-pressure fluid outlet as shown in the structural section view of the spray head shown in fig. 3.

The injection angle of the end of the gas-liquid pipeline and the position direction of the rotary cavity 6 are not limited to the structure shown in fig. 2, as shown in fig. 4, the arrangement mode of the rotary cavity 6 is adjusted, the injection angle of the gas flow and the liquid and the position direction of the rotary cavity 6 are changed, high-frequency vibration energy is generated to achieve an excellent atomization effect, and the structure shown in fig. 4 also changes the spraying direction of the water mist to be downwards sprayed according to a certain angle.

The fire fighting system constructed based on the atomizing nozzle can comprise a flow detection module, a pressure detection module, a temperature monitoring module and a data recording module. The whole system can directly automatically detect and trigger through temperature or fire source, automatically extinguish fire in the whole process, trigger different nozzles to extinguish fire according to data collected by detection, and automatically control the fire extinguishing time and the fire extinguishing mode through programs.

The protection of this application covers all the ways of satisfying the above-mentioned principle of construction, including other devices derived from the spray head described in this application.

Examples

The utility model discloses can be used to various occasions that need install fire extinguishing apparatus, like ground such as commercial building, warehouse, computer lab, aircraft cargo hold, steamer, for the description is convenient, combine the utility model relates to an utilize supersonic speed air current high frequency vibration energy to become the atomizer of fine particle with liquid atomization, it is right the utility model discloses a concrete embodiment does the explanation.

As shown in fig. 5, a set of fire suppression system units including gas supply, liquid supply, pressure regulation, flow monitoring, and sprinkler distribution. The compressed gas is firstly regulated to proper pressure through a pressure regulating valve, then the opening and closing of a gas circuit system are controlled through an electromagnetic valve, the gas consumption of the unit is recorded through a flowmeter, and finally the compressed gas is connected to a gas main pipeline; like water is firstly adjusted to proper pressure through the pressure regulating valve, then the opening and closing of the liquid path system are controlled through the electromagnetic valve, then the consumed water amount of the unit is recorded through the flowmeter, and finally the unit is connected to the liquid main pipeline. A plurality of branches are divided from the gas and liquid main pipelines and are respectively connected to the gas inlet and the liquid inlet of each spray head. In this way, a fire extinguishing unit is formed, and a complete system is composed of a plurality of such units and is monitored and controlled in a centralized manner through a control center. Each system is provided with a fire detection system, and once the temperature is monitored to be abnormal, the abnormal temperature can be fed back to a control center to control the operation of the valves of the corresponding units, so that the fire in the corresponding areas can be controlled.

The gas and liquid supply pressure of the system is not large, and the system can be supplied by conventional equipment. The compressed gas may be provided by an air compressor, booster pump or air reservoir, etc., and the water may be provided by municipal tap water, fire water, water tanks, etc.

Claims

1. A dual channel, low pressure fluid atomizer comprising: the gas injection pipe is of a Laval structure, and the liquid injection pipe is of a reducing structure with gradually reduced inner diameter; the gas output from the rotary cavity and the liquid output from the liquid spray pipe are mixed in a slit with the width of 0.1-5mm and then are sprayed out from the water mist outlet.

2. The two-channel low-pressure fluid atomizer according to claim 1, characterized in that it comprises a cylindrical base body (1), the side wall of the base body (1) is provided with a water mist outlet (7), the base body (1) is provided with at least one Laval-structured gas channel (4) and a necking-reducing structured liquid channel (5), and a rotary cavity (6), and a slit of 0.1-5mm is arranged between the lower end of the liquid channel and the rotary cavity.

3. The dual channel low pressure fluid atomizer according to claim 2, wherein the gas channel (4) is located in front of the rotating chamber (6) and the liquid channel (5) is located outside the gas channel (4).

4. The dual channel low pressure fluid atomizer of claim 2, wherein the rotating chamber (6) is rectangular or circular in cross-section.

5. The two-channel low-pressure fluid atomizer according to claim 2, further comprising an inlet pipe (3) and an inlet pipe (2), wherein the inlet pipe (3) is connected to the gas channel (4), and the inlet pipe (2) is connected to the liquid channel (5).