Triple foam generator for fire fighting

Abstract

The invention provides a three-connection foam generator for fire fighting, and relates to the technical field of fire fighting equipment, the three-connection foam generator comprises a main channel, one end of the main channel is provided with connectors along a horizontal line, each connector is provided with a spiral jet device, and the periphery of the spiral jet device far away from the connector end is installed on a foam barrel; a metal fine screen is mounted in each foam barrel, supporting arms are rotationally connected to the outer sides of the foam barrels on the two sides, and the supporting arms extend towards the ends, away from the spiral jet device, of the foam barrels and are provided with guide covers; aiming at the particularity of petrochemical fire disasters and the situation that the coverage area of a foam gun of a traditional high-pressure spraying fire fighting truck at the present stage cannot meet the requirement of an independent working face, foam coverage is carried out on the storage tank fire disasters by changing the types of spraying devices and the foam generation mode and installing a detachable three-connection foam gun barrel on a boom (high-pressure spraying fire fighting truck); the device is large in flow, wide in foam covering area and detachable, and overcomes the defects of a traditional high-pressure spraying vehicle at present.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting equipment, and in particular to a three-stage foam generator for fire fighting. Background Art

[0002] In the field of firefighting, oil fires have always been a huge challenge. The flammability and fluidity of oil make the fire spread quickly and difficult to control;

[0003] At present, the most effective weapon to deal with oil fires is the snow cannon medium-multiple foam generator. The snow cannon medium-multiple foam generator has an amazing foaming ability, and its single foaming multiple is more than 75 times, which is unmatched by traditional fire fighting equipment. They can produce rich foam groups in a short time. These foams can stay on the surface of the fuel for a long time, effectively isolate the air and inhibit the spread of the flame;

[0004] Compared with traditional firefighting water cannons, the multiple foam generators in snow cannons have obvious advantages in extinguishing oil fires. Although water cannons can quickly reduce the intensity of fires, their fire extinguishing effect is not significant for oil fires. The multiple foam generators in snow cannons can quickly form a foam protective layer to isolate the contact between air and flames, thereby achieving a better fire extinguishing effect.

[0005] However, the current way of releasing foam by foam generators has a low foaming multiple and efficiency. When applied to high-pressure fire trucks, it cannot meet the needs of large flow and foaming multiple. It is also unable to effectively control the spraying to the designated area, resulting in waste of foam groups. Therefore, we propose a three-connected foam generator for fire fighting. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings existing in the prior art. The current way of releasing foam by foam generator has low foaming multiple and efficiency. When applied to high-pressure fire trucks, it cannot meet the requirements of large flow and foaming multiple; and it is impossible to effectively control the spraying to the designated area, resulting in waste of foam groups.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A three-connection foam generator for fire fighting comprises a main channel. A connecting port is provided at one end of the main channel along a horizontal line. There are three connecting ports, each of which is equipped with a spiral ejector. The spiral ejector is installed on a foam barrel at a periphery away from the connecting port end. A metal fine screen is installed in the foam barrel. Support arms are rotatably connected to the outer sides of the foam barrels on both sides, and the support arms extend toward the end of the foam barrel away from the spiral ejector, and are equipped with guide covers.

[0009] Furthermore, the main channel is provided with an external interface away from the center of the connection port, which is connected to an external foam liquid tank through the external interface, and the foam liquid in the foam liquid tank is transported to the connection port through a pressure pump.

[0010] Furthermore, a bracket is fixed to the periphery of the spiral ejector, and the spiral ejector and the foam barrel are connected via the bracket so that the outlet of the spiral ejector corresponds to the center of the foam barrel.

[0011] Furthermore, the metal fine mesh has a double-layer design.

[0012] Furthermore, the foam barrel port of the support arm is horizontal and the maximum upward rotation angle is 60°.

[0013] Furthermore, a cylinder is installed on the outer side of the support arm, and the output end of the cylinder is arranged upward, and the cylinder and the foam barrel are both installed on the high-spray fire truck.

[0014] Furthermore, the guide cover is designed to correspond to the foam barrel end and the lower end opening.

[0015] Furthermore, the foam barrel and the guide cover are made of 6061 aluminum alloy.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The invention aims at the particularity of petrochemical fires. At present, the coverage area of ​​the foam cannon of the traditional high-pressure spray fire truck cannot meet the requirements of a single working surface. By changing the type of spraying equipment and the foam generation mode, a detachable three-link foam cannon barrel is installed on the boom (high-pressure spray fire truck) to cover the tank fire with foam. The equipment has a large flow rate, a wide foam coverage area and is detachable, which solves the shortcomings of the current traditional high-pressure spray truck.

[0018] 1) By increasing the number of barrels, the foam generation mode of the traditional foam cannon is changed. The foam concentrate is mixed and collided with the air through a double-layer metal fine screen to stimulate foam fission and increase the foaming effect, thereby maximizing the foaming multiple and efficiency of the foam, solving the problem that the traditional high-pressure spray truck foam cannon cannot meet the large flow and high foaming multiple;

[0019] 2) A rotatable support arm and guide cover are installed on the outside of the foam barrel. The angle of the support arm and the position of the guide cover are adjusted by telescopic cylinder. The foam group can be released directly to the rescued object at a close distance under the guidance of the guide cover, or the guide cover can be raised to spray the foam to the rescued object at a distance. The spraying direction and coverage range of the foam can be accurately controlled. This design avoids the waste of foam group, ensures that the foam can accurately cover the area where fire needs to be extinguished, and improves the fire extinguishing effect.

[0020] In summary, this foam generator is suitable for petrochemical storage tank fires of multiple overlapping and complex types. It has the advantages of being detachable, easy to carry, covering a wide area, and having a good foam generating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of a triple foam generator for fire fighting provided by the present invention;

[0022] Figure 2 A schematic diagram of the side structure of a foam barrel of a triple foam generator for fire fighting provided by the present invention;

[0023] Figure 3 A schematic diagram of the main channel surface of a triple foam generator for fire fighting provided by the present invention;

[0024] Figure 4 A schematic top view of the overall structure of a triple foam generator for fire fighting provided by the present invention.

[0025] Legend: 1. Main channel; 11. External interface;

[0026] 2. Connection port;

[0027] 3. spiral ejector; 31. bracket;

[0028] 4. Foam bucket;

[0029] 5. Fine metal screen;

[0030] 6. Support arm; 61. Cylinder;

[0031] 7. Guide cover. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to related references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Example 1

[0037] like Figure 1-4 As shown, the present invention provides a technical solution: a three-connection foam generator for fire fighting, comprising a main channel 1, a main body part being the main channel 1, a connecting port 2 being arranged at one end of the main channel 1 along a horizontal line, three connecting ports 2 being provided, a spiral ejector 3 being installed on each connecting port 2, the three connecting ports 2 being used to connect the spiral ejectors 3, ensuring that the foam stock solution can be evenly distributed to the three foam barrels 4, the spiral ejectors 3 being installed on the foam barrel 4 away from the periphery of the ends of the connecting ports 2, and being able to effectively spray and disperse the foam stock solution into the foam barrel 4 through its special spiral structure, a metal fine screen 5 being installed in the foam barrel 4, the outer sides of the foam barrels 4 on both sides being rotatably connected with support arms 6, and the support arms 6 extending toward the ends of the foam barrel 4 away from the spiral ejectors 3, and being installed with guide covers 7.

[0038] It should be noted that the metal fine screen 5 is designed with a double layer, and the foam concentrate passes through the double layer of the metal fine screen 5 and collides with the air to stimulate foam fission and increase the foaming effect.

[0039] Example 2

[0040] like Figure 1-4 As shown, an external interface 11 is provided at the center of the end of the main channel 1 away from the connecting port 2, which is connected to the external foam liquid tank through the external interface 11. The foam liquid in the foam liquid tank is transported to the connecting port 2 through the pressure pump. The pressure pump is used to transport the foam liquid in the foam liquid tank to the connecting port 2, thereby providing sufficient pressure for the spiral ejector 3.

[0041] A bracket 31 is fixed on the periphery of the spiral ejector 3, and the spiral ejector 3 and the foam barrel 4 are connected through the bracket 31 so that the outlet of the spiral ejector 3 corresponds to the center of the foam barrel 4. The bracket 31 is fixed on the periphery of the spiral ejector 3 to ensure that it corresponds to the center of the foam barrel 4, thereby improving the injection efficiency.

[0042] The support arm 6 and the foam barrel 4 ports are horizontal and the maximum upward rotation angle is 60 degrees.

[0043] A cylinder 61 is installed on the outer side of the support arm 6, and the output end of the cylinder 61 is arranged upward. The cylinder 61 and the foam barrel 4 are both installed on the high-pressure fire truck. The guide cover 7 is designed to correspond to the end and lower end openings of the foam barrel 4. Through the extension and contraction of the cylinder 61, the foam liquid can be directly released to the rescued object at a close distance under the guidance of the guide cover 7, and the guide cover 7 can also be lifted to spray the foam onto the rescued object in the distance.

[0044] The foam barrel 4 and the guide cover 7 are made of 6061 aluminum alloy, which is resistant to high temperatures.

[0045] The working process of the present invention is as follows: when using a three-connected foam generator for firefighting, the three-connected foam generator for firefighting is installed on a high-pressure fire truck, and an external foam liquid tank and a pressure pump are connected, the pressure pump is started, and the foam liquid in the foam liquid tank is transported to the connecting port 2 of the main channel 1 through the external interface 11, and the foam liquid enters the spiral ejector 3 through the connecting port 2, and is evenly dispersed into the foam barrel 4 after being sprayed by the spiral structure. Under the action of the double-layer metal fine screen 5, the foam liquid mixes and collides with the air, stimulating foam fission and increasing the foaming effect. The angles of the support arm 6 and the guide cover 7 are adjusted by the cylinder 61 according to actual needs. When it is necessary to spray foam at a close distance, the guide cover 7 is aimed at the rescued object; when it is necessary to spray at a long distance, the guide cover 7 is raised and the spraying direction is adjusted.

[0046] 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 three-stage foam generator for fire fighting, characterized in that: The invention comprises a main channel (1), one end of the main channel (1) is provided with a connection port (2) along a horizontal line, the connection ports (2) are three in number, a spiral ejector (3) is installed on each connection port (2), the outer periphery of the spiral ejector (3) away from the connection port (2) is installed on a foam barrel (4), a metal fine screen (5) is installed in the foam barrel (4), and support arms (6) are rotatably connected to the outer sides of the foam barrels (4) on both sides, and the support arms (6) extend toward the end of the foam barrel (4) away from the spiral ejector (3), and are installed with guide covers (7).

2. A three-stage foam generator for fire fighting according to claim 1, characterized in that: The main channel (1) is provided with an external interface (11) at the center of the end away from the connection port (2), which is connected to an external foam liquid tank via the external interface (11), and the foam liquid in the foam liquid tank is transported to the connection port (2) via a pressure pump.

3. A three-stage foam generator for fire fighting according to claim 1, characterized in that: A bracket (31) is fixed to the periphery of the spiral ejector (3), and the spiral ejector (3) and the foam barrel (4) are connected via the bracket (31), so that the outlet of the spiral ejector (3) corresponds to the center of the foam barrel (4).

4. A three-stage foam generator for fire fighting according to claim 1, characterized in that: The metal fine screen (5) is designed with double layers.

5. A three-stage foam generator for fire fighting according to claim 1, characterized in that: The end of the foam barrel (4) of the support arm (6) is horizontal and the maximum upward rotation angle is 60°.

6. A three-stage foam generator for fire fighting according to claim 1, characterized in that: A cylinder (61) is installed on the outer side of the support arm (6), and the output end of the cylinder (61) is arranged upwards. The cylinder (61) and the foam barrel (4) are both installed on a high-pressure fire truck.

7. A three-stage foam generator for fire fighting according to claim 1, characterized in that: The guide cover (7) is designed to correspond to the upper and lower openings of the foam barrel (4).

8. A three-stage foam generator for fire fighting according to claim 1, characterized in that: The foam barrel (4) and the guide cover (7) are made of 6061 aluminum alloy.

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