CN216653192U

CN216653192U - Foaming agent tank

Info

Publication number: CN216653192U
Application number: CN202121668271.6U
Authority: CN
Inventors: Z·M·尼古拉耶维奇; S·S·弗拉基米罗维奇; I·E·阿布里科夫娜
Original assignee: Mirkamov National Helicopter Center Jsc
Current assignee: Mirkamov National Helicopter Center Jsc
Priority date: 2020-07-21
Filing date: 2021-07-21
Publication date: 2022-06-03
Anticipated expiration: 2031-07-21
Also published as: KR20220000270U

Abstract

The utility model relates to a foaming agent tank. The present invention relates to the field of aircraft construction, and in particular to fire suppression systems for use on aircraft such as helicopters. The foamer tank (1) is made in the form of a rigid body (2) with a recess (3) for placing an electric pump (4) and a non-return valve (5). A filling neck (8) and a foam level sensor (9) are arranged on the upper panel (6) of the shell. A transverse deflector (10) is placed in the housing (2). At the same time, the body (2) is made of a complex shape, the lower surface having a slope leading to the centre, leading to the mounting position of the electric pump (4), and the rear surface following the contour of the internal panel of the cargo hold, and furthermore, the body (2) is made with a lower bevel (12). The tank (1) comprises a transverse deflector (10) made of composite material having a hole.

Description

Foaming agent tank

Technical Field

The present invention relates to the field of aircraft engineering, in particular to fire extinguishing systems for use on board an aircraft (for example on a helicopter).

Background

An onboard foam-forming system is known (patent WO2016126353, B64D1/16, published 2016, 8/11), which comprises a pipe leading from an inlet to a tank carried by an aircraft. A feed pump at the inlet draws water through the tube into the tank. The polymer gel emulsion tank feeds the polymer gel prior to the feed pump to add the polymer gel emulsion and activate the polymer gel emulsion with water. A separate pump inside the tank allows the option of recirculation inside the tank and/or discharge from the tank, for example via a nozzle. The polymer gel emulsion may optionally be fed to a tank pump rather than a feed pump to delay the addition of the polymer gel emulsion to the water carried by the aircraft.

An aerial fire extinguishing system is known (patent EP3496821, a62C3/02, published in 2019 on 6/19) comprising a tank unit consisting of a water tank, one or more foam storage tanks (or foam concentrate) and one or more foam pumps for pumping foam (or foam concentrate) from one or more foam tanks to the water tank for extinguishing fires. Two foam tanks are located inside the tank assembly, one on the port side of the tank assembly and the other on the right side of the tank assembly, to maintain a center of gravity along the longitudinal centerline of the tank assembly. The water tank and one or more foam tanks or both may contain one or more cylinders located inside the water, foam and/or water/foam solution storage tank assembly.

A device for feeding foam into a fire fighting container is known (patent GB2437407, B64D1/16, published on 10/24 of 2007), which contains a tank of liquid suspended from the helicopter on a cable, and in the helicopter nacelle there are one or more tanks for storing the foam, which is fed to the main tank by a hose. A special tray for placing foam containers is provided. The foam container is equipped with: a metering coupling, ball valve and sensor to assess the remaining level of foaming solution in the container; and a flow meter to measure and control the amount of the metered foaming solution.

There is also a known installation for horizontal, vertical and lateral fire extinguishing based on KA-32a11BC helicopter, closest to the claimed solution (patents RU109095U1, B64D1/18, a62C31/00, published on 10.0.2011), which contains tanks for blowing agent, with 150kg of liquid in each tank, supplied to the respective compartments of the main tank by electric pumps. On each tank of blowing agent there is a recess on the outside for mounting an electric pump feeding blowing agent to the main tank. The recess is closed with a lid.

A disadvantage of the known devices is that special modifications to the helicopter are required to mount the devices or to hold the container and that a set of cylinders or foam tanks are used to increase the amount of foam, which requires additional space in the nacelle.

SUMMERY OF THE UTILITY MODEL

The technical problem not solved in the known device, the solution of which is provided by the claimed utility model, is to create a container design for large volumes of foam that is protected from the hydraulic hammer to ensure flight safety in various modes.

The technical result is that by taking into account existing design features and the presence of adjacent cells, the working volume of the blowing agent tank is increased due to the complex shape of the tank being achieved, while it can be installed in a given position in the cargo hold.

This technical result is achieved due to the fact that: the tank 1 for foaming agent according to the utility model is made in the form of a rigid body 2 with a recess 3 for placing the electric pump 4 and the non-return valve 5, on the upper panel 6 of which are the lid 7, the filler neck 8 and the foam level sensor 9, in the body 2 there is a lateral deflector 10, the body 2 is made in a complex shape, while the lower surface has a slope leading to the centre, leading to the mounting position of the electric pump 4, and the rear wall 13 repeats the contour of the inner panel of the nacelle, the body 2 being made with a lower slope 12.

Furthermore, the recess 3 is closed with a quick-release shaped cap, so as to repeat the profile of the body 2 of the can 1.

In addition, the tank 1 is equipped with a manual discharge valve 11 to operate on the ground.

Also in the tank 1, there are provided transverse deflectors 10 made of composite material with holes of different diameters, made asymmetrically in the region of the partition (deflector).

Meanwhile, a bracket 14 for mounting to the fuselage is mounted on the rear wall 13 of the main body 2, and a bracket 15 for mounting to the floor of the helicopter is rigidly fixed on the lower surface.

In the proposed design of the tank 1 for blowing agent, the transverse deflector 10 is placed in the body 2, and the body 2 is made of a complex shape, whereas the lower surface has a slope leading to the centre, leading to the mounting position of the electric pump 4, and the rear wall 13 follows the contour of the internal panel of the nacelle, the body 2 being made with a lower slope 12, the tank 1 being designed to increase the working volume of the blowing agent tank to 400 litres, taking into account the existing design features and the presence of adjacent cells, and it can be mounted in a given position of the cargo hold.

At the same time, it is possible to use only one tank 1, instead of a group of tanks as in the prototype, while the tank 1 provides protection against water hammer in any helicopter flight mode, which increases the safety of use as a whole.

Drawings

The arrangement of the blowing agent tank is shown in the accompanying drawings, in which:

FIG. 1 is a side view of a blowing agent canister;

FIG. 2 is an internal structure of a blowing agent tank; and

FIG. 3 is a front view of a blowing agent canister.

Detailed Description

The tank 1 for the foaming agent is made in the form of a rigid body 2 having a recess 3 for housing an electric pump 4 and a check valve 5 (fig. 1, 2). Meanwhile, a cover 7 for maintenance, a filler neck 8, and a foam level sensor 9 are provided on the upper panel 6 of the main body 2.

The housing 2 contains a transverse deflector 10 made of composite material with holes of different diameters, which are made asymmetrically over the area of the diaphragm (deflector). The tank 1 is equipped with a manual drain valve 11 to operate on the ground.

The recess 3 is closed with a quick-release shaped lid 7, so as to repeat the outline of the can body 2 (fig. 3).

The body 2 of the tank 1 is made of a complex shape, while the lower surface has a slope leading to the center, leading to the installation location of the electric pump 4, and the rear surface follows the contour of the inner panel of the cargo hold (not shown) at the installation site of the tank 1.

The housing 2 has a lower slope 12 of the upper panel 6 and then expands or expands to create a given tank volume. On the rear wall 13 of the main body 2, a bracket 14 is mounted to be mounted to the body. On the lower surface, a U-shaped bracket 15 is rigidly fixed for attachment to the helicopter transverse profile and cargo floor tie-down joint.

A tank 1 for foaming agent is located in the cargo compartment of the helicopter.

Before use, a special or special composition is poured into the tank 1, which composition is fed into the extinguishing agent tank 16 with the aid of the electric pump 4. Tank 1 is designed for 400 liters of blowing agent.

The foam supply is regulated by a control and display panel and an operating control panel located in the cockpit (not shown). After a specified amount of blowing agent has been supplied to the tank 16, the electric pump 4 is automatically switched off, this amount being set by the pilot on a control and display panel (not shown). In the tank 16, the fire extinguishing compound is mixed and formed, and then the compound is thrown off the helicopter to extinguish the fire.

Claims

1. A blowing agent tank, the blowing agent tank (1) being made in the form of a rigid body (2) with a recess (3) for placing an electric pump (4) and a non-return valve (5), characterized in that the top panel (6) of the rigid body (2) has a filling neck (8) and a foam level sensor (9), that a lateral deflector (10) is provided in the rigid body (2), while the rigid body (2) is made in a complex shape, with a lower surface having a slope to the centre, to the mounting point of the electric pump (4), and a rear surface following the contour of the cargo compartment interior panel, the rigid body (2) also having a lower slope (12).

2. The foamer canister as claimed in claim 1, characterized in that said recess (3) is closed with a quick-release shaped cover (7), so that the profile of the rigid body (2) of the foamer canister (1) is repeated.

3. The foamer tank as claimed in claim 1, characterized in that the foamer tank (1) is equipped with a manual discharge valve (11) to operate on the ground.

4. The blowing agent tank as claimed in claim 1, characterized in that the blowing agent tank (1) comprises a transverse deflector (10) made of composite material, the transverse deflector (10) having holes of different diameters, which holes are made asymmetrically over the area of the transverse deflector.

5. The blowing agent tank according to claim 1, characterized in that a bracket (14) for mounting to the fuselage is mounted on the rear wall (13) of the rigid body (2) and a bracket (15) for mounting to the helicopter floor is rigidly fixed on the bottom surface.