WO2017016143A1

WO2017016143A1 - Air foam firefighting system

Info

Publication number: WO2017016143A1
Application number: PCT/CN2015/097516
Authority: WO
Inventors: 胡翔; 王靖; 余正兵
Original assignee: 成都自能消防设备有限公司
Priority date: 2015-07-29
Filing date: 2015-12-15
Publication date: 2017-02-02
Also published as: CN105148429A; CN105148429B

Abstract

An air foam firefighting system, consisting of a jetting system, a water supply system, an air supply system and a foam supply system. The jetting system is in communication with the water supply system, the air supply system and the foam supply system. The water supply system and the air supply system are self-powered supply systems, and the foam supply system is powered by the water supply system to supply a foam mixture via a Venturi negative pressure supply device. The jetting system is a cylindrical hollow structure independently arranged on a backpack-type or small vehicle mobile structural body, and comprises a firefighting spray pipe, a water, foam and air mixing device, and various medium inlets. The air foam firefighting system uses wind power as a jetting force of the firefighting system, may be used as an air firefighting device for forest firefighting, and may also be used for many other types of firefighting situations. The jetting system fully mixes a firefighting agent with water, further foaming and jetting is driven by the force wind, and the jetting distance is significantly extended. In conditions of relatively difficult fire scene traffic, the present invention fully achieves the goal of a light, portable, short-distance system which implements large-force firefighting.

Description

Air foam fire extinguishing system

Technical field

The present invention relates to fire extinguishing appliances, and more particularly to an integrated air foam fire extinguishing system including high pressure air, foam fire extinguishing agent and water as fire extinguishing medium.

Background technique

In the air foam fire extinguishing system, the foaming multiple is an important indicator of the fire extinguishing efficiency of the system. Active injection of high pressure air into the mixed foam liquid is an effective method to increase the foaming multiple of the foam fire extinguishing agent. The suction distance of the vacuum suction air system is farther.

Existing compressed air foam fire extinguishing systems include fixed or mobile systems. The fixed or mobile fire extinguishing system is mainly used to actively inject compressed air mixed with a foam mixture. The compressed air source usually uses a high pressure air pump, and the system is complicated.

Summary of the invention

The present invention discloses a piggyback miniature integrated air foam fire extinguishing system according to the deficiencies of the prior art. The problem to be solved by the present invention is to provide a water pipeline, a foam fire extinguishing agent, a foam liquid proportional mixing device, an electric drive fan, a foam spray gun, and the like integrated on a miniature knapsack structure, and can realize spraying according to the demand of a fire object. An air-foam fire extinguishing medium that mixes water, foam, and air in a certain ratio to realize a piggyback micro air foam fire extinguishing system that uses an electric drive fan as an air source.

The invention is achieved by the following technical solutions:

Air foam fire extinguishing system, consisting of spray device, water supply system, gas supply system, foam supply system The structure of the system and the piggyback structure, which are characterized by:

The spraying device is connected to the water supply system, the gas supply system and the foam supply system; wherein: the water supply system power is provided by an external force, the gas supply system is a self-contained power supply system, and the foam supply system is powered by the water supply system to supply the foam mixture;

The spraying device is disposed on the knapsack structure, and includes: a fire extinguishing nozzle at the front end, a water, a foam, an air mixing device in the middle, and a medium inlet at the rear end.

The spraying device comprises: an air foam mixed liquid fire extinguishing nozzle disposed at the front end; an air inlet disposed at a rear end of the mixed liquid fire extinguishing nozzle; a fire extinguishing agent mixed liquid inlet and a fire extinguishing agent disposed at a center of the air inlet axis Mixing liquid outlet; set at the joint of the mixed liquid fire sprinkler and the air inlet, evenly spaced around the water jet oblique opening, the angle between the axis of the water jet oblique opening and the axis of the mixed liquid fire sprinkler is 17 to 30 degrees; The port is in communication with the annular liquid chamber of the outer wall of the joint, the annular liquid chamber has a water inlet communicating with the water supply system; the fire extinguishant mixture inlet is in communication with the foam supply system, and the bypass water passage is provided at the water inlet of the annular liquid chamber to communicate with the foam supply system .

The gas supply system is disposed on the knapsack structure, including a two-stroke gasoline fan or an electric fan.

The foam supply system is disposed on the piggyback or movable structure, including a sequentially connected foam fire extinguishing agent storage tank, a check valve, a proportional control valve, a venturi injector, a venturi injector inlet and a water inlet setting The waterway is connected, and the venturi ejector outlet is connected to the fire extinguishing agent mixture inlet.

The water supply system includes a fire truck, a ground fire hydrant or/and a hand lift pump water supply.

The water jet oblique opening of the present invention is arranged around 3 to 10.

The fire extinguishing agent mixed liquid inlet of the present invention is arranged in parallel with the bypass water passage, and the bypass water passage is located at the connection portion between the fire extinguishing agent mixed liquid inlet and the fire extinguishing gun tube wall.

The fire extinguishing agent mixture outlet of the present invention is located at the rear end of the water jet oblique opening.

The invention can be provided as a portable air jet foam fire extinguishing system. It consists of a foam fire extinguishing agent storage box, a bypass venturi ejector, a proportional control valve, and a hand-controlled injection device placed on the back frame, and supplies water through an external water supply source such as a water supply fire truck, a ground fire hydrant, and a hand lift pump. . The external water supply source can be used in various forms, from 0.2mpa to 1.2mpa. When the external water supply source is supplied, the water inlet bypass water passage flows to the venturi ejector to form a negative pressure through the proportional adjustment valve to draw a proportion of the fire extinguishing agent, and then through the venturi ejector outlet to the fire extinguishing agent mixture inlet, the fire extinguishing agent mixture The outlet will squirt the fire-extinguishing agent jet and the oblique-hole jet of the external supply to form a negative pressure while atomizing. At the end of the injection system, a large amount of blower positive pressure blast air is taken in, so that the water, foam fire extinguishing agent and air are mixed according to the corresponding proportion. , spray 13 to 25 times of compressed air foam fire extinguishing medium.

The system of the invention adjusts the dryness of the foam according to the current situation of the fire field through the proportional control valve, and the system has a simpler structure, convenient operation and lower system equipment cost.

The invention relates to a piggyback miniature air foam fire extinguishing system which uses electric power to drive wind power, and designs a spray atomizing and pressurized air mixing system according to the characteristics of the ratio of the foaming multiple to the contact area of air and foam liquid. The invention can be applied as a water fire extinguishing device when the foam fire extinguishing agent passage is not opened, and can be applied to various fire extinguishing environments after opening the foam fire extinguishing agent passage; the injection system has a better structure, and the spraying system realizes sufficient fire extinguishing agent and water. The foam is mixed and further foamed under the driving of the driving wind, and the spraying distance is extended. Under the relatively difficult conditions of the fire field transportation, the system can be fully utilized for the purpose of light and easy movement and large-scale fire extinguishing at close range. Each of the invention The system is easy to adjust, and the application efficiency and integration functions are greatly improved.

DRAWINGS

Figure 1 is a schematic view showing the connection principle of the system of the present invention;

Figure 2 is a schematic structural view of the system of the present invention;

Figure 3 is a schematic cross-sectional view showing the structure of the spray device of the present invention.

In the figure, A is the injection device, B is the foam supply system, C is the water supply system, D is the gas supply system, 1 is the fire truck, 2 is the fire hydrant, 3 is the hand lift pump, 4 is the water source, 5 is the foam fire extinguishing agent storage Box, 6 is a proportional control valve, 7 is a check valve, 8 is a venturi injector, 9 is a gasoline engine, 10 is a blower, 11 is a venturi injector outlet, 12 is a venturi injector inlet, 13 is a mixing device, 131 is a jet oblique port, 132 is an annular liquid chamber, 133 is a water inlet, 134 is a bypass water passage, 135 is a fire extinguishing agent mixture inlet, 136 is an air inlet, 137 is a fire extinguishing nozzle, and 138 is a fire extinguishing agent mixed liquid outlet.

detailed description

The present invention is specifically described by the following examples, which are only used to further illustrate the present invention, and are not to be construed as limiting the scope of the present invention, and some non-essential improvements made by those skilled in the art according to the present invention. And adjustments are also within the scope of the invention.

1 to 3 are combined.

The air foam fire extinguishing system is composed of a spraying device A, a water supply system C, a gas supply system D and a foam supply system B, and the spraying device A is connected with the water supply system C, the gas supply system D and the foam supply system B, wherein: the water supply system C power Provided by external force, the gas supply system D is a self-contained power supply system. The foam supply system B is supplied with a power supply foam mixture by the water supply system C;

The spraying device A is disposed on the knapsack structure, and includes: a front end fire extinguishing nozzle 137, a middle water, a foam, an air mixing device 13, and a media inlet at the rear end.

The invention discloses a spraying device A, comprising: an air foam mixed liquid fire extinguishing nozzle 137 disposed at the front end; an air inlet 136 disposed at the same axis as the mixed liquid fire extinguishing nozzle 137; and disposed at the axis of the air inlet 136 a central fire extinguishing agent mixture inlet 135 and a fire extinguishing agent mixture outlet 138; a water injection oblique opening 131 disposed at a joint portion of the mixed liquid fire extinguishing nozzle 137 and the air inlet 136, and a water jet oblique opening 131 axis and mixing The liquid fire extinguishing nozzle 137 has an axial angle a of 17 to 30 degrees; the water jet oblique opening 131 communicates with the annular liquid chamber 132 of the outer wall of the joint portion, and the annular liquid chamber 132 has a water inlet 133 communicating with the water supply system; the fire extinguishing agent mixture inlet 135 is in communication with the foam supply system, and a bypass water passage 134 is provided in the water inlet 133 of the annular liquid chamber to communicate with the foam supply system.

The gas supply system D is disposed on the knapsack structure, including a two-stroke gasoline engine 9 and a blower 10.

The foam supply system B is disposed on the piggyback or movable structure, including the sequentially connected foam fire extinguishing agent storage tank 5, the check valve 7, the proportional regulating valve 6, the venturi injector 8, the venturi injector inlet 12 and the water The bypass water passage 134 provided at the inlet 133 is in communication, and the venturi injector outlet 11 is in communication with the fire extinguishing agent mixture inlet 135.

The water supply system C of the present invention includes a fire truck 1, an above ground fire hydrant 2 or/and a hand lift pump 3 water supply device.

The water jet oblique opening 131 of the present invention can be arranged around 3 to 10. This example is six.

The fire extinguishing agent mixture inlet 135 is disposed in parallel with the bypass water passage 134, and the bypass water passage 134 is located The fire extinguishing agent mixture inlet 135 is connected to the fire extinguishing tube wall.

1 is a schematic view showing the connection principle of the system of the present invention; and FIG. 2 is a schematic structural view of the system of the present invention. Fig. 1 shows the connection principle of the present invention, that is, the connection structure of each fire extinguishing agent passage, and Fig. 2 is a schematic view showing the connection structure of each specific device which may be employed in the present invention. In the figure, the system consists of an injection device A, a water supply system C, a gas supply system D and a foam supply system B. The injection device A is in communication with a water supply system C, a gas supply system D and a foam supply system B, wherein the water supply system C is powered by an external force. Provided that the gas supply system D is a self-contained power supply system, the foam supply system B is powered by the water supply system C to supply the foam mixture through the venturi negative pressure supply. Each system can be disposed on a movable structure such as a piggyback type.

Figure 3 is a schematic cross-sectional view showing the structure of the spray device of the present invention. The spraying device A of the present invention is a cylindrical empty tube structure, the front end of the empty tube is a fire extinguishing nozzle 137, the rear end is an air inlet 136, the middle part is a mixing chamber, and the middle part comprises a water jet inclined opening 131 disposed on the empty tube wall and arranged around. As shown in the figure, in this example, the water injection oblique openings 131 are six, evenly spaced, and the angle between the axis of the water injection oblique opening 131 and the axis of the fire extinguishing nozzle 137 is 17 to 30 degrees, and the inlet ends of the water injection oblique openings 131 are The annular liquid chamber 132 communicates, and the water pressure at the inlet end equalizes the water jet oblique openings 131 in the mixing chamber to form a cross jet collision and atomize, which can generate a larger negative pressure than the direct injection foam gun, and suck in more air. Moreover, the liquid atomization increases the contact area with the air, resulting in a higher expansion ratio. The annular liquid chamber 132 communicates with the water inlet 133. For ease of use, the structure is more compact, and the water inlet 133 is disposed in an oblique direction along the cylindrical hollow tube structure. The axial center of the rear air inlet 136 is a fire extinguishing agent mixed liquid passage formed by the fire extinguishing agent mixed liquid inlet 135 and the fire extinguishing agent mixed liquid outlet 138, wherein the radial plane where the nozzle portion of the fire extinguishing agent mixed liquid outlet 138 is located is formed at the water jet oblique opening 131. Radial plane back end, This structure can form a better mixing effect, maximizing the foaming efficiency.

In the present invention, the fire extinguishing agent mixture inlet 135 and the fire extinguishing agent mixture outlet 138 constitute a fire extinguishing agent mixed liquid passage which is disposed in parallel with the bypass water passage 134, and the bypass water passage 134 is located at the joint portion of the fire extinguishing agent mixed liquid passage and the fire extinguishing gun tube wall. The structure is more compact, and the input and output resistance of each medium is small and smoother.

The invention relates to a piggyback micro air foam fire extinguishing system with a wind turbine. The invention designs a spray atomizing and pressurized air mixing system according to the characteristics that the foaming multiple 13 is proportional to the contact area of the air and the foam liquid. The invention can be applied as a water fire extinguishing device when the foam fire extinguishing agent passage is not opened, and can be applied to various fire extinguishing environments after opening the foam fire extinguishing agent passage; the spraying device has a better structure, and the spraying device realizes the thorough mixing of the fire extinguishing agent and the water. The foam is formed and further foamed under the driving of the driving wind, and the spraying distance is extended. Under the relatively difficult conditions of the fire field transportation, the purpose of the system is light and easy to move, and the large power fire extinguishing is realized at a short distance. The systems of the present invention are easy to adjust, and the application efficiency and integration functions are greatly improved.

Claims

An air foam fire extinguishing system is composed of a spraying device, a water supply system, a gas supply system, a foam supply system and a piggyback structure, and is characterized by:

The spraying device is connected to the water supply system, the gas supply system and the foam supply system; wherein: the water supply system power is provided by an external force, the gas supply system is a self-contained power supply system, and the foam supply system is powered by the water supply system to supply the foam mixture;

The spraying device is disposed on the knapsack structure, and includes: a fire extinguishing nozzle at the front end, a water, a foam, an air mixing device in the middle, and a medium inlet at the rear end.
The air foam fire extinguishing system according to claim 1, wherein the spraying device comprises: an air foam mixed liquid fire extinguishing nozzle disposed at the front end; and an air inlet disposed at a rear end of the mixed liquid fire extinguishing nozzle; a fire extinguishing agent mixture inlet and a fire extinguishing agent mixture outlet disposed at a center of the air inlet axis; a water jet oblique port disposed at a joint portion of the mixed liquid fire extinguishing nozzle and the air inlet, the water jet oblique axis and the mixed liquid The angle of the fire spout nozzle is 17-30 degrees; the water jet oblique port communicates with the annular liquid chamber of the outer wall of the joint portion, and the annular liquid chamber has a water inlet connected with the water supply system; the fire extinguishing agent mixture inlet is connected with the foam supply system, The water inlet of the annular liquid chamber is provided with a bypass water passage in communication with the foam supply system.
The air-foam fire-extinguishing system according to claim 2, wherein the air supply system is disposed on the piggyback structure, including a two-stroke gasoline fan or an electric fan.
The air foam fire extinguishing system according to claim 2, wherein the foam supply system is disposed on the piggyback or movable structure, including a sequentially connected foam fire extinguishing agent storage tank, a check valve, a proportional regulating valve, and a mound In the ejector, the venturi ejector inlet is connected to the bypass water passage provided by the water inlet, and the venturi ejector outlet is connected to the fire extinguishing agent mixture inlet.
The air-foam fire-extinguishing system according to claim 2, wherein said water supply system comprises a fire truck, a fire hydrant on the ground, and/or a water supply device for the hand lift pump.
The air foam fire extinguishing system according to any one of claims 2 to 5, characterized in that the water jet oblique opening is arranged around 3 to 10.
The air foam fire extinguishing system according to claim 6, wherein the fire extinguishing agent mixture inlet is disposed in parallel with the bypass water passage, and the bypass water passage is located at a joint portion between the fire extinguishing agent mixture inlet and the fire extinguishing tube wall.
The air foam fire extinguishing system according to claim 6, wherein said fire extinguishing agent mixture outlet is located at a rear end of the water jet oblique opening.