CN115554631B

CN115554631B - Storage and spraying device and fire-extinguishing aircraft

Info

Publication number: CN115554631B
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: Comac Shanghai Aircraft Design & Research Institute; Commercial Aircraft Corp of China Ltd
Current assignee: Comac Shanghai Aircraft Design & Research Institute; Commercial Aircraft Corp of China Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-06-30
Anticipated expiration: 2042-09-23
Also published as: CN115554631A

Abstract

The invention relates to a storage and spraying device which is arranged in a fire-fighting aircraft and comprises: a plurality of liquid storage tanks provided with an air inlet pipeline connected to a compressed air source, an air inlet valve arranged on the air inlet pipeline, an outlet pipeline and an outlet valve arranged on the outlet pipeline; the connecting pipeline is arranged between adjacent liquid storage tanks of the liquid storage tanks so as to enable the adjacent liquid storage tanks to be in fluid communication; and a diaphragm installed in at least one of the plurality of liquid storage tanks or the connection pipes in such a manner as to be vertically installed from top to bottom that an upper portion of a fluid passage in an interior of the liquid storage tank or the connection pipe to which the diaphragm is installed is closed, and a lower portion of the fluid passage is allowed to be in fluid communication to change a direction of fluid flow through the diaphragm. The device can drain and discharge the stored fire extinguishing agent more uniformly at a faster speed, and can reduce the shaking of the liquid fire extinguishing agent in the liquid storage tank. In addition, the invention also relates to a fire-extinguishing aircraft.

Description

Storage and spraying device and fire-extinguishing aircraft

Technical Field

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

Background

In recent years, various fires on earth, particularly forest fires, frequently occur. After forest fires occur, the forest fires are usually extinguished by means of the forces of ground firefighters and fire trucks, so that the cost is high, the time is long, and the personnel and property losses possibly caused are serious.

Fire extinguishment is an effective method by means of aviation fire-fighting equipment in addition to or instead of ground, but most of aviation fire-fighting equipment comprises helicopters, and the helicopters have limited single-time loading of fire extinguishing agents. Compared with a helicopter, the fixed wing fire-extinguishing aircraft has more fire-extinguishing agent, has a longer voyage, can cover a wider range of fire area, is more effective in flame retardance, 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 realizing rapid and uniform spraying of the fire extinguishing agent, and the capacity and the spraying speed of the device determine the length and the thickness of the fire-retardant belt on the ground, so that the device is a key factor for judging whether the fire retardation is successful or not.

Many attempts have been made in the prior art to improve the fire extinguishing efficiency and safety of fire extinguishing aircraft. For example, in the patent of the invention entitled "fluid injection device" filed by the simplified air bus operation company at 12/3/2010, publication number CN102639194a, a small fire extinguisher is disclosed which uses a physical structure in which gas is generated to trigger a pyrotechnic reaction when a fire occurs, a first zone breaks and releases a piston which pushes a fire extinguishing agent in a second zone to release. However, the fire extinguisher has a small capacity, a limited single load of extinguishing agent, and needs to be triggered by a pyrotechnic reaction to release the extinguishing agent.

In the invention patent of Britton, coulosen et al, 4/16/2018 entitled multi-tank System for an aerial fire aircraft, publication No. CN 110691734A, a large-scale liquid spraying device for use in a fire-extinguishing aircraft is disclosed, wherein the spraying device utilizes gravity to discharge, two liquid storage tanks are arranged in front of and behind the aircraft, and a side-by-side discharge cabin door is arranged at the bottom of each liquid storage tank.

In addition, in the patent of the invention of Enhanced aerial delivery system and U.S. Pat. No. 8,066.223 B2, which is filed by Qing International aviation control company (Evergreen International Aviation Inc) in the year 7 and 15 of 2010, a spraying system for fire-extinguishing aircraft is disclosed, which belongs to a pressurizing and discharging system, and consists of a series of pressure gas tanks and liquid storage tanks, wherein a high-pressure gas is utilized to drive the fluid in the liquid storage tanks to flow out, and a fluid outlet is arranged at the bottom of the tank body.

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

(1) Most of the liquid storage tanks are made of metal, and the metal is easy to process, but the weight of the metal liquid storage tanks is large, so that the weight of an airplane is not reduced, and when the weight of the airplane is increased, the use of the liquid storage tanks is limited;

(2) When the high-pressure liquid storage tank is manufactured by adopting the composite material, the fiber winding stress is considered to have directivity, and the connecting pipes of the liquid storage tanks can only be connected through holes at the axial line. However, the drainage air flow is easy to be short-circuited, and the discharge flow is quite uneven in distribution along with time; after the short circuit, the water quantity below the inner axis of the liquid storage tank is too much to be nearly half of the water storage, so that the emptying requirement is difficult to reach;

(3) These disclosures are primarily biased towards the connection of the system arrangement to the apparatus, lacking detailed provisions in the means for storing and spraying the fire suppressant;

(4) At present, the design of the inner partition plate of the liquid storage tank does not consider the flowability requirement, and how to rely on the reasonable design of the device to ensure that the fire-extinguishing aircraft is uniformly discharged, so that the thickness of the ground flame-retardant belt is uniform and has few references.

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

Disclosure of Invention

The invention aims to provide a storage spraying device capable of rapidly and uniformly spraying fire extinguishing agent for use on a fire-extinguishing aircraft.

According to one aspect of the present invention, a storage and spray device is presented that may be disposed in a fire suppression aircraft and may include:

a plurality of liquid storage tanks provided with an air inlet pipeline connected to a compressed air source, an air inlet valve arranged on the air inlet pipeline, an outlet pipeline and an outlet valve arranged on the outlet pipeline;

the connecting pipeline is arranged between adjacent liquid storage tanks of the liquid storage tanks so as to enable the adjacent liquid storage tanks to be in fluid communication; and

a diaphragm mounted in at least one of the plurality of liquid storage tanks or the connection pipes in such a manner as to be vertically mounted from top to bottom that an upper portion of a fluid passage in an interior of the liquid storage tank or the connection pipe to which the diaphragm is mounted is closed, and a lower portion of the fluid passage is allowed to be in fluid communication to change a direction of fluid flow through the diaphragm.

In this way, the extinguishing agent stored in the storage and spraying device can be emptied at a faster rate by means of the pushing of the high-pressure gas, and by means of such a baffle arrangement, on the one hand, the sloshing of the extinguishing agent fluid in the reservoir when the extinguishing aircraft changes speed (for example at take-off) can be reduced, and on the other hand, the discharge of fluid can be made more uniform and short-circuiting of the high-pressure gas flow for the discharge of liquid can be avoided, i.e. the high-pressure gas is not applied to the liquid to accelerate the liquid emptying, 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 tanks, the partition plate may be installed at the middle of the plurality of liquid tanks in the longitudinal direction (e.g., in the flying direction), or at the middle of the connecting pipe.

According to the above aspect of the present invention, preferably, the partition plate may be installed at an upper portion 3/4 of a cross-sectional diameter of at least one of the plurality of liquid storage tanks or at 1/2 of a pipe diameter of the connecting pipe. The inventors have found that by this arrangement, it is helpful to maximize the high pressure airflow action, facilitating rapid emptying of the fluid in the reservoir.

The inventors found that if the separator is inclined towards the outlet, the high pressure air flow will exhibit a "diversion" effect along with the separator direction, exacerbating the gas short circuit phenomenon, and if it is inclined away from the outlet, the air flow will form a vortex in the angle formed by the separator and the tank, causing additional energy consumption. Thus, according to the above aspect of the present invention, it is preferable that 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, it is preferable that the surface of the separator includes a trapezoidal flow passage having a trapezoidal corrugated structure, or includes a transverse arc-shaped flow passage. With this arrangement, it is possible to establish a flow path on the surface of the separator, the flow path is short, potential energy difference exists in the flow path, and adhesion of liquid droplets (e.g., water droplets) on the surface of the separator is reduced.

According to the above aspect of the present invention, preferably, the plurality of liquid reservoirs may be of a layered construction comprising an inner metal liner layer and an outer composite layer, wherein the longitudinal axes of the plurality of liquid reservoirs are aligned with the longitudinal axis of the connecting line. By 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 agent can be contained under the same aircraft 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 a bottom of at least one of the plurality of liquid tanks. The drain port may be used to drain the liquid reservoir of liquid, for example, to keep the fire suppressant in ice, when not in operation or when needed.

According to the above aspect of the present invention, preferably, in order to drain the fluid remaining in the whole storage and spray device, the storage and spray device may further include a capillary tube connected between the outlet line and the bottom of the liquid storage tank near the outlet line for draining the residual liquid of the liquid storage tank.

According to the above aspect of the present invention, preferably, a partition plate may be installed in each of the plurality of liquid storage tanks. The inventor finds that the water is drained uniformly and quickly by the corresponding test, and the time required for the final 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 reservoir.

According to another 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 air flow short circuit, and can prevent gas from being prematurely short-circuited by adjusting the distribution and the installation angle of the partition plates under the condition of not damaging the strength of the tank body of the liquid storage tank, so that uniform discharge is promoted; simultaneously, a capillary tube design is adopted to achieve the aim of emptying;

(2) The partition plate of the storage and spraying device can be designed to be of a preset length, and the installation position, angle and installation direction of the partition plate in the tank body can be adjusted. The arrangement can solve the problems of residual and uneven drainage caused by premature short-circuiting of the drainage air flow when the connecting pipes are arranged around the axis. In addition, the numerical simulation result proves that the baffle plate can be installed to achieve the purpose of uniformly and rapidly emptying the liquid storage;

(3) The partition board of the storage and spraying device can establish a plurality of flow channels with potential energy difference on the plane of the partition board, avoid forming a large water film by splitting or separating the plane, reduce the adhesion of water drops on the wall surface through the flow channels with potential energy, and solve the wall surface water flow wall hanging problem.

Therefore, the storage and spraying device can meet the use requirement, overcomes the defects of the prior art and achieves the preset aim.

Drawings

For a further clarity in describing the storage and spraying device according to the invention, the invention will be described in detail with reference to the drawings and detailed description, in which:

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

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

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

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

FIG. 5 is a comparison of numerically simulated drainage results with baffles mounted in different positions according to a non-limiting embodiment of the present invention.

The figures are merely schematic and are not drawn to scale.

List of reference numerals in the figures and examples:

100-storage and spraying device, comprising:

10-liquid storage tank, comprising:

11-an intake line comprising:

11A-intake valve;

a 12-outlet line comprising:

12A-outlet valve;

13-a bottom drain;

10A-a first liquid storage tank;

10B-a second fluid reservoir;

10C-a third liquid storage tank;

20-connecting line, comprising:

21-a first connecting line;

22-a second connecting line;

a 30-separator, comprising:

31-trapezoid flow channels;

32-a transverse arc-shaped 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 should be further understood that the specific devices illustrated in the accompanying drawings and described in the specification are simply exemplary embodiments of the inventive concepts disclosed and defined herein. Thus, unless explicitly stated otherwise, the particular orientations, directions, or other physical characteristics to which the various embodiments disclosed relate should not be considered limiting.

Fig. 1 is a schematic perspective view of a storage and spray device 100 according to a non-limiting embodiment of the invention. The storage and spraying device 100 may be provided in a fire-fighting aircraft, for example in a cabin of the fire-fighting aircraft, and is constructed 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 include: a plurality of liquid storage tanks 10, connecting pipes 20 and a partition plate 30.

The plurality of liquid tanks 10 may include three liquid tanks shown in fig. 1, for example, a first liquid tank 10A, a second liquid tank 10B, and a third liquid tank 10C arranged in this order from upstream to downstream on a flow path in which the extinguishing agent is discharged from the liquid tanks. These reservoirs may be of the same shape and size and may be made of the same material.

The fluid reservoir 10 may be used to store a fire suppressant such as, but not limited to: water or a flame retardant fluid formed by mixing water with a flame retardant material. According to the present invention, the liquid storage tank 10 is a liquid storage tank for fire extinguishing agent emptied by high pressure gas, and therefore, the material of the liquid storage tank 10 should ensure sufficient pressure bearing capacity for liquid and be able to withstand high pressure gas, i.e. pressure above atmospheric pressure.

Each reservoir may be of cylindrical configuration as shown in the drawings and may comprise a layered construction. For example, at least one of the plurality of reservoirs 10 may include an inner metal liner layer and an outer composite layer. In the embodiment shown in fig. 1, one dimension of the fluid reservoir 10 may be, for example: straight pipe section length: 2000mm, cross-sectional diameter: 800mm. Thus, in an embodiment of a tank array including 3 tanks, the storage and spray device 100 may contain approximately 3.9t of fire suppressant.

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

The use of composite materials to make high pressure tanks is advantageous in that it can significantly reduce the weight of the storage and spray device 100 of the present invention while ensuring the pressure strength of the tank 10, thereby enabling a fire suppression aircraft including such composite high pressure tanks to carry more fire suppressant.

It should be understood, however, that the configuration and arrangement shown in the drawings is illustrative only, and that one skilled in the art may design other types of reservoirs as desired, such as reservoirs having a generally oval or rectangular cross-section, and that the number, size, and manner of connection of the reservoirs may vary from that shown in the drawings. In addition, the person skilled in the art can modify this depending on the required liquid storage function and the space in the cabin of the actual fire-fighting aircraft.

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

An intake valve 11A may be provided in the intake line 11, the intake valve 11A separating a high pressure end from a low pressure end and controlling a high pressure inlet pressure and a spraying time during the spraying of the fire extinguishing agent.

Intake valve 11A may be any fluid control valve known in the art. Preferably, the intake valve 11A is a one-way valve, and as a preferred embodiment, the intake valve 11A is a solenoid valve, and is connected to a corresponding controller to facilitate automatic/electrified control.

With continued reference to fig. 1, downstream of the third liquid storage tank 10C may be provided an outlet line 12, which outlet line 12 may serve as a fluid path for fire suppressant to be sprayed out of the fire suppression aircraft. Preferably, the diameter of the outlet line 12 may be 30% of the diameter of the third fluid reservoir 10C.

Likewise, an outlet valve 12A may be provided on the outlet line 12. The outlet valve 12A is opened when the storage and spraying device 100 according to the present invention is in operation, for example, when spraying of fire suppressant is required, for cooperation with the inlet valve 11A to control the spraying time and the spraying flow. Preferably, the outlet valve 12A is a one-way valve, and as a preferred embodiment, the outlet valve 12A is a solenoid valve, coupled to a corresponding controller, to facilitate automatic/electrified control.

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

In a preferred embodiment, the storage and spray device 100 may further include a capillary tube 40, the capillary tube 40 may be connected between the outlet line 12 and the bottom of the third tank 10C, for example, for draining the tank 10 of residual liquid (residual fire suppressant).

Additionally, although not shown in the drawings, one or more of the plurality of liquid storage tanks 10 may be provided with a liquid inlet for filling with a fire extinguishing agent, and in alternative embodiments, the inlet line 11 may also function as a liquid inlet line.

With continued reference to fig. 1, connecting lines 20 may be provided between adjacent ones of the plurality of fluid reservoirs 10, such as a first connecting line 21 provided between the first fluid reservoir 10A and the second fluid reservoir 10B, and a second connecting line 22 of the second fluid reservoir 10B and the third fluid reservoir 10C, to place the adjacent fluid reservoirs in fluid communication. In this way, the three

tanks

10A, 10B, and 10C can be equivalent to one integral tank.

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

A partition plate 30 may be provided in at least one of the plurality of liquid storage tanks 10 or the connection pipe 20. Preferably, a partition plate 30 is installed in each of the liquid tanks 10, and further preferably, in the first liquid tank 10A among the plurality of liquid tanks 10.

As schematically shown in fig. 1, the diaphragm 30 may be vertically installed in the liquid storage tank 10 from top to bottom such that an upper portion of a fluid passage in the interior of the liquid storage tank 10 where the diaphragm 30 is installed is closed, and a lower portion of the fluid passage allows fluid communication to change a direction of fluid flow through the diaphragm 30, particularly for changing a direction of high-pressure air flow. In this way, the baffle 30 can reduce the short-circuiting time of the air flow to achieve the requirement of uniformly and rapidly evacuating the fire-extinguishing fluid.

Preferably, the partition plate 30 may be installed at a substantially middle position in the longitudinal direction of the liquid storage tank 10 in the longitudinal direction (i.e., in the length direction of the liquid storage 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 free flow of fluid.

As a preferred embodiment, the baffle 30 is mounted perpendicular to the inner surface of the body of the reservoir 10. If the separator plate 30 is inclined toward the outlet direction, the high pressure air flow will exhibit a "diversion" effect along with the direction of the separator plate 30, exacerbating the gas short circuit phenomenon. If the baffle 30 is inclined away from the outlet direction, the airflow may form a vortex in the angle formed by the baffle 30 and the body of the reservoir 10, causing additional energy consumption. Accordingly, the baffle 30 is preferably angularly mounted perpendicular to the inner surface of the can.

In embodiments where the baffle 30 is mounted to the connecting conduit 20, the mounting height of the baffle 30 may be, for example, 1/2 of the cross-sectional diameter of the connecting conduit 20, i.e., such that the upper 1/2 of the connecting conduit 20 is blocked by the baffle 30 and the lower 1/2 allows free flow of fluid.

Also at this time, it is preferable that the partition plate 30 is angularly installed to be perpendicular to the inner surface of the connection pipe 20.

As a non-limiting example, the baffle 30 may be welded, glued, or otherwise securely attached to the liquid storage tank 30, such as to its metallic inner layer, so as not to loosen or shift under the impact of 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 as a non-limiting example, the perimeter of the baffle 30 follows the contour of the interior surface of the reservoir 10, i.e., a portion of a circle as shown in fig. 2, and as noted above, preferably has a height of 3/4 of the cross-sectional diameter of the reservoir 10. In addition, preferably, the separator 30 has no holes or openings therein.

Fig. 3 is a top view of the separator 30 shown in fig. 2. As shown in the drawing, the separator 30 includes a trapezoidal corrugated structure on the surface thereof, which can be used as the trapezoidal flow channel 31, thereby reducing the wall-hanging phenomenon of water droplets on the separator.

Alternatively, the baffle 30 may be provided with a transverse arcuate flow passage 32 on the 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 channel (fig. 4), a flow channel can be established on the surface of the partition board 30, the flow path is short, potential energy difference exists in the flow channel, and adhesion of liquid drops (such as water drops) on the wall surface is reduced.

Fig. 5 is a comparison of numerically simulated drainage results with the spacer 30 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 board 30 is installed at different positions. The comparison scheme includes the following settings:

(1) No partition board, i.e. no partition board 30 is arranged in all the liquid storage tanks 10 and the connecting pipes 20;

(2) The separator 30 is provided in the first liquid storage tank, that is, only in the first liquid storage tank 10A;

(3) The separator 30 is provided in the third liquid storage tank, that is, only in the third liquid storage tank 10C;

(4) The separator 30 is provided in all the tanks, i.e., in all three

tanks

10A, 10B, and 10C; and

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

It can be seen that the draining is best in the case of (2) the first reservoir and (4) the entire reservoir, and that the draining is more uniform, faster, and requires less time for the final draining in the case of (4) the entire reservoir.

The supercharged storage and spraying device 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 air inlet valve 11A, and can rapidly empty the fire extinguishing agent with a small flow area; the baffle 30 considering the flow performance is added in the supercharged liquid storage tank 10, and the baffle 30 can change the air flow direction so as to reduce the air flow short-circuit time, so that most of the time the air flow pushes the water flow to the front, and the phenomenon that excessive residual liquid is left after spraying in the liquid storage tank and the liquid is difficult to empty is solved.

With continued reference to fig. 5, when the separator 30 is installed, the amount of residual liquid at 5s is approximately 0, so that the purpose of rapidly and uniformly draining the liquid can be achieved.

The terms "upper", "lower" and the like used herein to indicate orientation or orientation are merely for better understanding of the inventive concept shown in the preferred embodiments by those of ordinary skill in the art, and are not intended to limit the invention. Unless otherwise indicated, all orders, orientations, or orientations are used solely for the purpose of distinguishing one element/component/structure from another element/component/structure, and do not denote any particular order, order of operation, direction, or orientation unless otherwise indicated. For example, in alternative embodiments, the "first fluid reservoir" may be the "second fluid reservoir".

In view of the foregoing, the storage and spray device 100 according to embodiments of the present invention overcomes the shortcomings of the prior art and achieves the intended objects.

While the storage and spray device of the present invention has been described in connection with the preferred embodiments, those of ordinary skill in the art will recognize that the above examples are for illustrative purposes only and are not intended to be limiting. Accordingly, the present invention may be variously modified and changed within the spirit of the claims, and all such modifications and changes are intended to 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 intake pipe (11) connected to a compressed air source, an intake valve (11A) mounted on the intake pipe (11), an outlet pipe (12) provided downstream of the plurality of liquid storage tanks (10), and an outlet valve (12A) mounted on the outlet pipe (12);

a connecting line (20) disposed between adjacent ones of the plurality of liquid storage tanks (10) to fluidly connect the adjacent liquid storage tanks; and

a diaphragm (30) mounted in at least one of the plurality of liquid storage tanks (10) or the connection pipe (20) in such a manner as to be vertically mounted from top to bottom that an upper portion of a fluid passage in an interior of the liquid storage tank (10) or the connection pipe (20) to which the diaphragm (30) is mounted is closed, and a lower portion of the fluid passage is allowed to be in fluid communication to change a fluid flow direction flowing through the diaphragm (30).

2. The storage and spraying device (100) according to claim 1, wherein the partition (30) is installed in the middle of the plurality of liquid storage tanks (10) in the longitudinal direction or in the middle of the connecting piping (20).

3. The storage and spray device (100) according to claim 1, wherein the partition (30) is mounted at an upper portion 3/4 of a cross-sectional diameter of at least one of the plurality of liquid storage tanks (10) or at 1/2 of a pipe diameter of the connecting pipe (20).

4. The storage and spraying device (100) according to claim 1, characterized in that the partition (30) is mounted perpendicular to the inner wall of the liquid storage tank (10) or perpendicular to the inner wall of the connecting line (20).

5. The storage and spray device (100) according to claim 1, wherein the surface of the partition (30) comprises a trapezoidal flow channel (31) with a trapezoidal corrugated structure or comprises a transverse arcuate flow channel (32).

6. The storage and spray device (100) of any one of claims 1-5, wherein the plurality of reservoirs (10) are of a layered construction comprising an inner metal liner layer and an outer composite material layer, wherein a longitudinal axis of the plurality of reservoirs (10) is aligned with a longitudinal axis of the connecting conduit (20).

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

8. The storage and spray device (100) according to any one of claims 1-5, further comprising a capillary tube (40) connected between the outlet line (12) and a bottom of a reservoir of the plurality of reservoirs (10) proximate the outlet line (12) for evacuating a residual liquid of the plurality of reservoirs (10).

9. The storage and spray device (100) of any one of claims 1-5, wherein the baffle (30) is mounted in each of the plurality of liquid reservoirs (10).

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