CN115554631A

CN115554631A - Storage and sprinkler and fire-fighting aircraft

Info

Publication number: CN115554631A
Application number: CN202211169461.2A
Authority: CN
Inventors: 孙静楠; 孙浩然; 马岩; 曹祎; 刘华源; 吴成云
Original assignee: Commercial Aircraft Corp of China Ltd
Current assignee: Commercial Aircraft Corp of China Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-01-03
Anticipated expiration: 2042-09-23
Also published as: CN115554631B

Abstract

The invention relates to a storage and spraying device which is arranged in a fire-fighting aircraft and comprises: the liquid storage tanks are provided with air inlet pipelines connected to a compressed air source, air inlet valves arranged on the air inlet pipelines, outlet pipelines and outlet valves arranged on the outlet pipelines; the connecting pipeline is arranged between the adjacent liquid storage tanks of the plurality of liquid storage tanks so as to enable the adjacent liquid storage tanks to be communicated with each other in a fluid mode; and a partition installed in at least one of the plurality of tanks or the connecting pipes in a vertical manner from top to bottom such that an upper portion of a fluid passage in an interior of the tank or the connecting pipe where the partition is installed is closed and a lower portion of the fluid passage allows fluid communication to change a flow direction of fluid flowing through the partition. The device makes the fire extinguishing agent of storage with faster speed evacuation, discharge more even to can reduce liquid fire extinguishing agent and rock in the liquid storage tank. In addition, the invention also relates to a fire-fighting airplane.

Description

Storage and sprinkler and fire-fighting aircraft

Technical Field

The present invention relates to aerial fire fighting systems and equipment, particularly to a storage and spraying device, and more particularly to a composite pressurized storage and spraying device for use on fire fighting aircraft. In addition, the invention also relates to a fire-extinguishing airplane.

Background

In recent years, various fires frequently occur on the earth, and particularly, forest fires frequently occur. After a forest fire occurs, the forest fire is usually extinguished by means of the force of ground firefighters and fire trucks, so that the forest fire is high in cost and long in time, and the possible personnel and property loss is serious.

Fire extinguishment is effectively assisted or replaced by ground fire-fighting equipment, but most of the fire-fighting equipment is helicopters, and the helicopters are limited in single-load fire extinguishing agent. Compared with a helicopter, the fixed-wing fire extinguishing aircraft has more fire extinguishing agent, is farther in voyage, can cover a wider fire area, is more effective in fire retardation, and reduces the tasks and risks of ground fire extinguishing personnel. The device for spraying the fire extinguishing agent in the fire extinguishing aircraft bears the task of quickly and uniformly spraying the fire extinguishing agent, the length and the thickness of the ground fire-retardant belt are determined by the capacity and the spraying speed of the device, and the device is a key factor for judging whether fire retardance is successful or not.

Many attempts have been made in the prior art to improve the fire fighting efficiency and safety of fire fighting aircraft. For example, in an invention patent entitled "fluid jet device" and publication number CN102639194A filed by the company simplified sharps airliner in 2010, 12/3/2010, a small fire extinguisher is disclosed, which utilizes a physical structure, when a fire occurs, gas generates a triggering pyrotechnic reaction, a first area ruptures and releases a piston, and the piston pushes a fire extinguishing agent in a second area to release the fire extinguishing agent. However, this extinguisher has a small capacity, a limited single charge of extinguishing agent, and requires triggering by a pyrotechnic reaction to release the extinguishing agent.

In the invention patent, which is filed in 2018, 4, 16 and 16, entitled "multi-tank system for aerial fire-fighting aircraft" and publication number CN 110691734A, by brillon curson et al, a large-scale liquid spraying device applied to a fire-fighting aircraft is disclosed, the spraying device utilizes gravity to discharge, two liquid storage tanks are arranged in front and at the back of the aircraft, and a split discharge cabin door is arranged at the bottom of the liquid storage tank.

In addition, in the invention patents entitled Enhanced Aviation delivery system and U.S. Pat. No. 8,066.223 B2, which are filed by Evergreen International Aviation control corporation on 7, 15.2010, the invention patent of Evergreen International Aviation Inc, the spraying system belongs to a pressurized discharge system and consists of a series of pressure gas tanks and liquid storage tanks, the high-pressure gas is used for driving the fluid in the liquid storage tanks to flow out, and a fluid outlet is arranged at the bottom of the tank body.

However, the existing storage and spraying systems for fire-fighting aircraft have at least the following problems:

(1) The liquid storage tank is made of metal, but the metal liquid storage tank is heavy and is not beneficial to weight reduction of the airplane, and when the airplane has weight increase limitation, the liquid storage tank is limited in use;

(2) When the high-pressure liquid storage tank is made of the composite material, the connection pipes of the liquid storage tank can be connected only by forming holes at the axis part in consideration of the directionality of fiber winding stress. However, at this time, the short circuit of the drainage airflow is easy to occur, and the drainage flow is very unevenly distributed along with the time; after short circuit, the water amount below the axis in the liquid storage tank is nearly half of the stored water, and the emptying requirement is difficult to achieve;

(3) These disclosures are primarily biased toward system layout in connection with the apparatus, lack detailed placement within the apparatus for storing and spraying the fire suppressant;

(4) At present, the requirement of fluidity is not considered in the design of an inner partition plate of a liquid storage tank, and how to ensure the uniform discharge of a fire-fighting airplane by means of the reasonable design of a device is less mentioned, so that the thickness of a ground flame-retardant belt is uniform.

Accordingly, there is a significant need to provide an improved storage and spraying device that overcomes one or more of the disadvantages of the prior art.

Disclosure of Invention

The object of the present invention is to provide a storage and spraying device which can be used on fire-fighting aircraft to spray extinguishing agent quickly and evenly.

According to one aspect of the invention, a storage and spraying device is proposed, which can be provided in a fire-fighting aircraft and which can comprise:

the liquid storage tanks are provided with air inlet pipelines connected to a compressed air source, air inlet valves arranged on the air inlet pipelines, outlet pipelines and outlet valves arranged on the outlet pipelines;

the connecting pipeline is arranged between the adjacent liquid storage tanks of the plurality of liquid storage tanks so as to enable the adjacent liquid storage tanks to be communicated with each other in a fluid mode; and

and a partition installed in at least one of the plurality of fluid reservoirs or the connection pipes in a vertical manner from top to bottom such that an upper portion of a fluid passage is closed at an inside of the fluid reservoir or the connection pipe where the partition is installed, and a lower portion of the fluid passage allows fluid communication to change a flow direction of a fluid flowing through the partition.

In this way, the extinguishing medium stored in the storage and spraying device can be emptied at a faster rate by the thrust of the high-pressure gas, and by means of this baffle arrangement, on the one hand, sloshing of the extinguishing medium fluid in the tank can be reduced when the extinguishing aircraft changes speed (for example, takes off), and, on the other hand, the discharge of the fluid can be made more uniform and a short-circuit of the high-pressure gas flow for discharging the liquid can be avoided, i.e. the high-pressure gas is not exerted on the liquid in order to accelerate the emptying of the liquid, but flows directly from the inlet line to the outlet line.

According to the above aspect of the present invention, preferably, in order to minimize sloshing of the liquid in the liquid storage tanks, the partition plate may be installed at the middle of the plurality of liquid storage tanks in the longitudinal direction (e.g., the flying direction), or at the middle of the connecting line.

According to the above aspect of the present invention, preferably, the partition plate may be installed at the upper 3/4 of the cross-sectional diameter of at least one of the plurality of tanks, or at 1/2 of the upper portion of the pipe diameter of the connection pipe. The inventors have found that this arrangement helps to maximise the high pressure airflow effect, causing the fluid in the reservoir to drain rapidly.

The inventor finds that if the partition plate inclines towards the outlet direction, high-pressure airflow can present a 'diversion' effect along with the partition plate direction, so that the phenomenon of gas short circuit is aggravated, and if the partition plate inclines away from the outlet direction, the airflow can form a vortex in an included angle formed by the partition plate and the tank body, so that extra energy consumption is caused. Therefore, according to the above aspect of the present invention, preferably, the partition is installed perpendicular to the inner wall of the liquid storage tank or the inner wall of the connection pipe.

According to the above aspect of the present invention, preferably, the surface of the separator includes a trapezoidal flow channel having a trapezoidal corrugated structure, or includes a transverse arc flow channel. With this arrangement, it is possible to establish a flow path on the surface of the partition plate, the flow path is short, the flow path has a potential difference, and the adhesion of liquid droplets (e.g., water droplets) on the surface of the partition plate is reduced.

According to the above aspect of the present invention, preferably, the plurality of liquid storage tanks may be of a layered construction including an inner layer of metal innerliner and an outer layer of composite material, wherein longitudinal axes of the plurality of liquid storage tanks are aligned with longitudinal axes of the connecting pipes. Through the arrangement, the material of the high-pressure liquid storage tank is not limited to metal, and composite materials can be used, so that the weight of the storage and spraying device is greatly reduced, more fire extinguishing agents can be contained under the same airplane load, and the fire extinguishing efficiency is improved.

According to the above aspect of the present invention, preferably, a bottom drain port may be provided at the bottom of at least one of the plurality of liquid storage tanks. This leakage fluid dram can evacuation liquid storage tank hydrops for remaining fluid in evacuation liquid storage tank when not working or needs, so that for example place fire extinguishing agent and freeze etc..

According to the above aspect of the present invention, preferably, in order to empty the fluid remaining in the entire storage and spraying apparatus, the storage and spraying apparatus may further include a capillary tube connected between the outlet line and the bottom of the liquid storage tank near the outlet line for emptying the residual liquid of the liquid storage tank.

According to the above aspect of the invention, preferably, a partition plate may be installed in each of the plurality of liquid storage tanks. The inventor finds through corresponding experiments that the arrangement drains water uniformly and rapidly, and the time required for emptying is short.

According to the above aspect of the present invention, preferably, the diameter of the outlet pipe may be set to 30% of the diameter of the liquid storage tank.

According to a further aspect of the invention, a fire fighting aircraft is proposed, which may comprise a storage and spraying device according to the above aspect.

Advantageous technical effects of the storage and spraying device according to the present invention may include, but are not limited to, the following:

(1) The storage and spraying device can prevent short circuit of air flow, and can prevent premature short circuit of air and promote uniform discharge by adjusting the distribution and installation angle of the partition plates without damaging the strength of the tank body of the liquid storage tank; simultaneously, the capillary design is adopted to achieve the aim of emptying;

(2) The partition of the storage and spraying device of the present invention may be designed to have a predetermined length and may be adjusted in its installation position, angle and installation direction in the tank body. This arrangement can solve the problem of residual and uneven liquid discharge caused by premature short-circuiting of the discharge air flow when the connecting pipe is arranged around the axis. In addition, the numerical simulation result proves that the partition board can achieve the purpose of uniformly and quickly emptying the stored liquid;

(3) The partition plate of the storage and spraying device can establish a plurality of flow channels with potential energy difference on the plane of the partition plate, avoids forming a large water film by splitting or separating the plane, reduces the attachment of water drops on the wall surface through the flow channels with potential energy, and solves the problem of wall surface water flow wall hanging.

The storage and sprinkling device according to the invention thus allows to satisfy the requirements of use, overcoming the drawbacks of the prior art and achieving the intended aim.

Drawings

In order to further clarify the storage and spraying device according to the invention, the latter will be described in detail below with reference to the attached drawings and a specific embodiment, in which:

FIG. 1 is a schematic perspective view of a storage and spray device according to a non-limiting embodiment of the present invention;

FIG. 2 is a first exemplary form of a partition for a storage and spray device according to a non-limiting embodiment of the present invention;

FIG. 3 is a top view of the separator plate shown in FIG. 2;

FIG. 4 is a second exemplary form of a partition of a storage and spray apparatus according to a non-limiting embodiment of the present invention; and

FIG. 5 is a comparison of numerically simulated liquid discharge effects when the baffles are installed in different positions according to a non-limiting embodiment of the present invention.

The figures are purely diagrammatic and not drawn true to scale.

List of reference numbers in the figures and examples:

100-a storage and spray device comprising:

10-a fluid reservoir comprising:

11-an air intake circuit comprising:

11A-an intake valve;

12-an outlet line comprising:

12A-an outlet valve;

13-bottom drain;

10A-a first liquid storage tank;

10B-a second liquid storage tank;

10C-a third liquid storage tank;

20-connecting lines comprising:

21-a first connecting line;

22-a second connecting line;

30-a separator comprising:

31-trapezoidal flow channel;

32-transverse arc flow channel;

40-capillary.

Detailed Description

It is to be understood that the invention may assume various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices illustrated in the attached drawings, and described in the specification, are simply exemplary embodiments of the inventive concepts disclosed and defined herein. Thus, specific orientations, directions or other physical characteristics relating to the various embodiments disclosed should not be considered limiting unless expressly stated otherwise.

FIG. 1 is a schematic perspective view of a storage and spray device 100 according to a non-limiting embodiment of the present invention. The storage and spraying device 100 may be disposed in a fire fighting aircraft, such as in the cabin of a fire fighting aircraft, and is structured and arranged to conform to the structure of the aircraft cabin for containing and spraying fire suppressant to the exterior of the fire fighting aircraft when desired.

As shown and according to a non-limiting embodiment, the storage and spray device 100 may comprise: a plurality of tanks 10, connecting pipes 20, and partitions 30.

The plurality of tanks 10 may include three tanks as shown in FIG. 1, such as a first tank 10A, a second tank 10B, and a third tank 10C arranged in sequence from upstream to downstream in the flow path of the fire suppressant exiting the tanks. These reservoirs may be of the same shape and size and may be made of the same material.

Fluid reservoir 10 may be used to store fire suppression agents such as, but not limited to: water or a fire-retardant fluid formed by mixing water with a fire-retardant material. According to the present invention, the liquid storage tank 10 is a liquid storage tank for fire extinguishing agent evacuated by means of high-pressure gas, and therefore, the material of the liquid storage tank 10 should ensure sufficient pressure-bearing capacity for liquid and be capable of bearing high-pressure gas pressure, i.e., capable of bearing pressure higher than atmospheric pressure.

Each reservoir may be a cylindrical structure as shown in the drawings, and may include a tiered configuration. For example, at least one of the plurality of fluid storage tanks 10 may include an inner layer of a metallic innerliner and an outer layer of a composite material. In the embodiment illustrated in FIG. 1, one dimension of the fluid reservoir tank 10 may be, for example: length of straight pipe section: 2000mm, cross-sectional diameter: 800mm. Thus, in the embodiment of a tank pack comprising 3 tanks, the storage and sprinkler apparatus 100 may hold approximately 3.9 tons or so of fire suppressant.

When using composite materials as the outer layer, it is preferable that the axis of the tank be aligned with the axis of the connecting conduit 20 to facilitate the wrapping and machining of the outer layer of composite material, for example, so that both the upstream and downstream openings thereof are disposed about the central axis (e.g., longitudinal axis) of the tank, thereby increasing the strength of the walls of the tank to withstand the high pressure gases that can assist in the discharge of the fire suppressant from the storage and dispensing device 100 at a faster rate.

It is advantageous to use composite materials for the high pressure liquid storage tank, which can significantly reduce the weight of the storage and spraying apparatus 100 of the present invention while ensuring the bearing strength of the liquid storage tank 10, thereby enabling fire fighting aircraft including such composite material high pressure liquid storage tanks to carry more fire suppressant.

It should be understood, however, that the construction and arrangement illustrated in the drawings is illustrative only and that other types of tanks, such as tanks having a generally oval or rectangular cross-section, may be designed by those skilled in the art as desired and that the number, size and connection of tanks may be different from that illustrated in the drawings. In addition, the person skilled in the art can adapt the function according to the required liquid storage and the space in the cabin of the actual fire-fighting aircraft.

With continued reference to fig. 1, upstream of the first tank 10A an inlet line 11 may be provided, which inlet line 11 may be connected between the tank 10 and a compressed gas source, such as a high pressure gas tank (not shown), for feeding high pressure gas into the first tank 10A. Preferably, the intake pipe 11 may be positioned at the axial center (i.e., the center axis) of the first tank 10A at the front end of the first tank 10A. In other words, the longitudinal axis of the intake pipe 11 is aligned with the longitudinal axis of the first tank 10A.

An air inlet valve 11A may be provided in the air inlet line 11, the air inlet valve 11A being used to separate the high pressure end from the low pressure end and being used to control the inlet pressure and the time of the high pressure air stream during the fire suppressant spraying process.

Intake valve 11A may be any fluid control valve known in the art. The inlet valve 11A is preferably a one-way valve, and in the preferred embodiment the inlet valve 11A is a solenoid valve and is coupled to a corresponding controller for automatic/electrified control.

With continued reference to FIG. 1, downstream of the third reservoir 10C, an outlet line 12 may be provided, which outlet line 12 may serve as a fluid pathway for fire suppressant to be sprayed outboard of the fire fighting aircraft. Preferably, the diameter of the outlet pipe 12 may be 30% of the diameter of the third tank 10C.

Likewise, an outlet valve 12A may be provided on the outlet line 12. The outlet valve 12A is opened during operation of the storage and spraying device 100 according to the invention, for example when it is desired to spray extinguishing agent, for cooperating with the inlet valve 11A to control the spraying time and the spraying flow rate. Preferably, the outlet valve 12A is a one-way valve, and in the preferred embodiment, the outlet valve 12A is a solenoid valve and is coupled to a corresponding controller for automatic/electrified control.

By way of non-limiting example, the bottom of at least one of the plurality of tanks 10 (e.g., at the lowest liquid level) may be provided with a bottom drain 13. The liquid outlet 13 can drain accumulated liquid in the liquid storage tank, and drain residual fluid in the liquid storage tank 10 when the liquid storage tank is not in work or is needed so as to reduce the risk of icing. The diameter of the liquid outlet 13 is set to be as small as possible to ensure that the pressure-bearing capacity of the liquid storage tank 10 is not reduced.

As a preferred embodiment, the storage and spraying device 100 may further comprise a capillary tube 40, and the capillary tube 40 may be connected, for example, between the outlet line 12 and the bottom of the third reservoir 10C for emptying the reservoir 10 of residual liquid (residual fire suppressant).

Additionally, although not shown in the drawings, one or more of the plurality of tanks 10 may be provided with a liquid inlet for filling with fire suppressant, and in an alternative embodiment, the inlet line 11 may also serve as the liquid inlet line.

With continued reference to FIG. 1, the connecting lines 20 may be disposed between adjacent ones of the plurality of tanks 10, such as a first connecting line 21 disposed between the first tank 10A and the second tank 10B, and a second connecting line 22 disposed between the second tank 10B and the third tank 10C, to fluidly communicate the adjacent tanks. In this manner, the three

reservoirs

10A, 10B and 10C can be equated to one integral reservoir.

The length of the connecting line 20 may vary depending on the space in the cabin of the fire-fighting aircraft, and the pipe diameter of the connecting line 20 may be designed according to the maximum opening diameter acceptable for the axial pressure-bearing of the tank of the liquid storage tank 10, and preferably, the longitudinal axis of the connecting line 20 is on the same horizontal line as the longitudinal axis of the liquid storage tank 10.

The baffle 30 may be disposed in at least one of the plurality of tanks 10 or the connecting lines 20. Preferably, a baffle 30 is mounted in each tank 10, and further preferably in a first tank 10A of the plurality of tanks 10.

As schematically illustrated in FIG. 1, the baffle 30 may be mounted vertically in the tank 10 from top to bottom such that an upper portion of the fluid passageway within the tank 10 in which the baffle 30 is mounted is closed, while a lower portion of the fluid passageway allows fluid communication to change the direction of fluid flow through the baffle 30, particularly for changing the direction of high pressure airflow. In this way, the baffle 30 can reduce the short-circuiting time of the gas flow to meet the requirement of uniformly and rapidly evacuating the fire suppression fluid.

Preferably, the baffle 30 may be mounted at a position substantially midway in the longitudinal direction of the tank 10 (i.e., in the direction of the length of the tank). The mounting height of the baffle 30 may be, for example, 3/4 of the cross-sectional diameter of the tank 10, i.e., such that the upper 3/4 of the tank 10 is blocked by the baffle 30 and the lower 1/4 allows fluid to flow freely.

In the preferred embodiment, baffle 30 is mounted perpendicular to the interior surface of the tank of fluid reservoir tank 10. If the baffle plate 30 is inclined towards the outlet, the high-pressure gas flow can be guided along the direction of the baffle plate 30, and the gas short circuit phenomenon is aggravated. If the baffle 30 is inclined away from the outlet, the air flow will swirl in the angle formed by the baffle 30 and the tank of the tank 10, causing additional energy consumption. Therefore, it is preferable that the baffle 30 is angularly installed to be perpendicular to the inner surface of the can.

In the embodiment of mounting the partition 30 to the connecting duct 20, the mounting height of the partition 30 may be, for example, 1/2 of the cross-sectional diameter of the connecting duct 20, i.e., such that the upper 1/2 of the connecting duct 20 is blocked by the partition 30 and the lower 1/2 allows the fluid to flow freely.

Also, at this time, it is preferable that the partition 30 is installed at an angle perpendicular to the inner surface of the connecting duct 20.

By way of non-limiting example, baffle 30 may be welded, bonded, or otherwise securely attached to reservoir 30, such as to its metallic inner layer, so as not to loosen or become dislodged upon impact of the fire suppressant or high pressure gas.

FIG. 2 is a first exemplary form of a baffle 30 of a storage and spray device 100 according to a non-limiting embodiment of the present invention.

As shown in FIG. 2 and by way of non-limiting example, the periphery of the baffle 30 conforms to the contour of the inner surface of the fluid reservoir tank 10, i.e., a portion of a circle as shown in FIG. 2, and, as noted above, is preferably 3/4 the height of the cross-sectional diameter of the fluid reservoir tank 10. In addition, preferably, the baffle 30 has no holes or openings.

Fig. 3 is a plan view of the separator 30 shown in fig. 2. As shown, the baffle 30 includes a trapezoidal corrugation on its surface, which can be used as a trapezoidal flow channel 31 to reduce the wall hanging phenomenon of water drops on the baffle.

Alternatively, the baffle 30 may be provided with transverse arcuate flow channels 32 on its surface, such an embodiment being shown in FIG. 4.

Thus, by the trapezoidal corrugated structure (fig. 2 and 3) or the transverse arc-shaped flow passage (fig. 4), a flow passage can be established on the surface of the partition plate 30, the flow passage is short, the flow passage has a potential difference, and the adhesion of liquid droplets (for example, water droplets) on the wall surface is reduced.

FIG. 5 is a comparison of numerically simulated liquid discharge effects when the baffle 30 is installed in different positions according to a non-limiting embodiment of the present invention.

As shown in fig. 5, the inventors compared the liquid discharge effect when the partition 30 was installed at different positions. The comparative protocol included several settings:

(1) No partition plate is provided, namely, no partition plate 30 is arranged in all the liquid storage tanks 10 and the connecting pipes 20;

(2) The partition plate 30 is provided in the first reservoir tank, i.e., only in the first reservoir tank 10A;

(3) A partition plate 30 is provided in the third tank, that is, only in the third tank 10C;

(4) Partition plates 30 are arranged in all the liquid storage tanks, namely, in all the three

liquid storage tanks

10A, 10B and 10C; and

(5) The partition 30 is provided in the first connecting line, i.e., only in the first connecting line 21.

It can be seen that the emptying effect is best in (2) the first tank and (4) all tanks, and that in (4) all tanks the drainage is more uniform, faster and takes less time to empty last.

The pressurized storage and spraying apparatus 100 according to the present invention can achieve the purpose of sectionally or continuously spraying the fire extinguishing agent by using the control of the intake valve 11A, and can rapidly empty the fire extinguishing agent in a small flow area; the partition plate 30 considering the flowing performance is additionally arranged in the supercharged liquid storage tank 10, the partition plate 30 can change the airflow direction so as to reduce the airflow short-circuit time, so that the airflow pushes the water flow forwards in most of time, and the phenomenon that the liquid is too much left after being sprayed in the liquid storage tank and is difficult to empty in the prior art is solved.

With further reference to fig. 5, after the partition 30 is installed, the amount of residual liquid is approximately 0 at the 5 th time, so that the purpose of quickly and uniformly draining the stored liquid can be achieved.

The terms "upper", "lower", and the like for indicating the order of orientation or orientation, as used herein, are only used for better understanding the concept of the present invention as shown in the preferred embodiments by those of ordinary skill in the art, and are not intended to limit the present invention. Unless otherwise specified, all sequences, orientations, or orientations are used for the purpose of distinguishing one element/component/structure from another element/component/structure only, and do not imply any particular sequence, order of operation, direction, or orientation, unless otherwise specified. For example, in an alternative embodiment, the "first reservoir" may be the "second reservoir".

In summary, the storage and spray device 100 according to an embodiment of the present invention overcomes the disadvantages of the prior art and achieves the intended purpose.

While the storage and spraying device of the present invention has been described in connection with the preferred embodiment, it will be understood by those skilled in the art that the foregoing examples are intended to be illustrative only and are not to be taken as limiting the invention. Therefore, various modifications and changes can be made to the present invention within the spirit and scope of the claims, and these modifications and changes will fall within the scope of the claims of the present invention.

Claims

1. A storage and spraying device (100) provided in a fire-fighting aircraft and comprising:

a plurality of liquid storage tanks (10) provided with an air intake pipe (11) connected to a compressed air source, an air intake valve (11A) mounted on the air intake pipe (11), an outlet pipe (12), and an outlet valve (12A) mounted on the outlet pipe (12);

a connecting line (20) disposed between adjacent ones of the plurality of fluid reservoirs (10) to fluidly communicate the adjacent fluid reservoirs; and

a partition (30) installed in at least one of the plurality of fluid reservoirs (10) or the connecting line (20) in such a manner as to be vertically installed from top to bottom, so that an upper portion of a fluid passage in an interior of the fluid reservoir (10) or the connecting line (20) where the partition (30) is installed is closed, and a lower portion of the fluid passage allows fluid communication to change a flow direction of a fluid flowing through the partition (30).

2. Storage and sprinkling device (100) according to claim 1, wherein said partition (30) is mounted in the middle of said plurality of tanks (10) in the longitudinal direction, or in the middle of said connecting duct (20).

3. Storage and sprinkling apparatus (100) according to claim 1, wherein said baffle (30) is mounted at the upper 3/4 of the cross-sectional diameter of at least one of said plurality of tanks (10) or at 1/2 of the upper part of the pipe diameter of said connecting pipe (20).

4. Storage and sprinkling device (100) according to claim 1, wherein said partition (30) is mounted perpendicular to the inner wall of said tank (10) or to the inner wall of said connecting duct (20).

5. Storage and sprinkling device (100) according to claim 1, wherein the surface of the baffle (30) comprises trapezoidal flow channels (31) with trapezoidal corrugation structure or comprises transverse arc flow channels (32).

6. Storage and sprinkling apparatus (100) according to any one of claims 1-5, wherein said plurality of liquid storage tanks (10) are of a layered construction comprising an inner metallic lining layer and an outer composite layer, wherein the longitudinal axes of said plurality of liquid storage tanks (10) are aligned with the longitudinal axis of said connecting pipe (20).

7. Storage and sprinkling device (100) according to any one of claims 1-5, wherein a bottom drain (13) is provided at the bottom of at least one of the plurality of liquid storage tanks (10).

8. Storage and sprinkling device (100) according to any one of claims 1 to 5, further comprising a capillary tube (40) connected between said outlet conduit (12) and the bottom of one of said plurality of tanks (10) close to said outlet conduit (12) for emptying said plurality of tanks (10) of residual liquid.

9. Storage and sprinkling apparatus (100) according to any one of claims 1-5, wherein said partition (30) is mounted in each of said plurality of tanks (10).

10. A fire fighting aircraft comprising a storage and spraying device (100) according to any one of claims 1-9.