RU201508U1 - HELICOPTER SMOKE ALERT - Google Patents

Abstract

The utility model relates to the field of aircraft construction, namely, to means of detecting smoke in the cockpit, cabin or cargo compartment of a helicopter. The smoke warning device in the helicopter contains smoke detectors (1) located in the helicopter cockpit and connected to the on-board network. The body of each sensor 1 is attached to a bracket (2) made in the form of a U-shaped plate. In this case, each bracket (2) is installed on the upper surface of the ceiling skin (3) of the helicopter above the hole (4) made in it. Each hole 4 is closed from below with a decorative mesh 6, which is part of the ceiling cladding (3). Achieved reduction in weight of the structure, simplified installation, increased reliability in operation and flight safety. 4 ill.

Description

The utility model relates to the field of aircraft construction, namely, to means of detecting smoke in the cockpit, cabin or cargo compartment of a helicopter.

A known device is an ionization-type smoke detector (US patent 4853544, G01N 27/64, published 01.08.1989), which is placed in a heat-resistant metal case that forms an external electrode, and with an attached rear cover, covering the upper part of the insulating main board. The heat-resistant body includes a cylindrical part surrounding the external ionization chamber, a rectangular square part surrounding an insulating base plate, and a flat stepped part connecting the square prismatic part and the cylindrical part. The rectangular outer sections are bent upward to form a rectangular quadratic prismatic part, and the adjacent side edges of the four rectangular four sections are attached to each other by pins, which can also be used to connect the housing to its lid.

A known system for detecting a fire in the cargo compartment of an aircraft (US patent 7333129, A62C 35/08, published 02.19.2008), which includes a gas generator placed in a rectangular housing, for the installation of which a special U-shaped base with holes at the bottom and equipped with supporting tapes.

Known is a combined assembly of a smoke sensor and a light source and an aircraft cargo compartment containing this assembly, which is closest to the claimed utility model (patent RU 2467398, A62C 3/08, published on November 20, 2012), which contains a smoke detector sensor installed in the housing , light source, electrical interface, control electronics for smoke detector sensor. The connecting plug provides direct connection of the node to the aircraft power system. The cargo compartment of the aircraft contains a cladding element of the cargo compartment and a combined smoke detector and illuminator assembly, which is installed in the upper part of the cargo compartment.

These devices and smoke detectors are used, as a rule, in aircraft cabins, the dimensions and height of which are larger in comparison with a helicopter. In this case, the smoke detectors are fixed by means of special mounting housings, which complicates the manufacture of the structure and installation.

The technical problem, the solution of which is provided by the claimed utility model, is to ensure the possibility of detection of smoke by the crew members in any isolated compartment of the helicopter, which corresponds to clause 29.855 (d) of the Aviation Regulations, Part 29. At the same time, it is necessary to ensure ease of manufacture and installation, low weight, as well as the reliability of fastening in the process of use with all the loads that are possible during the operation of the helicopter that arise in flight (vibration, shock, etc.).

The technical result consists in reducing the weight of the structure, simplifying installation, increasing operational reliability and flight safety.

The technical result is achieved due to the fact that in a device for warning about smoke in a helicopter, containing smoke detectors located in the helicopter cockpit and connected to the on-board network, in accordance with the claimed utility model, - the body of each sensor is attached to a bracket made in the form of P- shaped plate, with each bracket mounted on the upper surface of the ceiling skin of the helicopter above the holes made in it, while the width of the brackets is less than the length of the holes in the panel.

In this case, each hole is closed from below with a decorative mesh, which is part of the ceiling sheathing.

The use of smoke detectors in the device, fixed on brackets made in the form of a U-shaped plate, the width of which is less than the length of the holes in the panel and which are fixed on the upper surface of the ceiling cladding of the helicopter above the holes made in it, is aimed at simplifying installation, increasing operational reliability and safety flights, allows the use of air masses everywhere in the helicopter compartment in order to control possible smoke.

The smoke warning device in the helicopter is shown in the drawings:

fig. 1 - smoke warning device, top view;

fig. 2 - smoke warning device, view A of FIG. 4;

fig. 3 - smoke warning device, side view;

fig. 4 - smoke warning device, general view of the installation in the helicopter cockpit.

The smoke warning device is designed to detect smoke in the cargo (passenger) cabin of the helicopter and issue an information signal to the information board about the fire in the cockpit of the crew.

The smoke alert device in the helicopter contains smoke detectors 1 connected to the on-board electrical network (not shown), while the body of each sensor 1 is attached to an arm 2 made in the form of a U-shaped plate.

To install smoke detectors 1 in the decorative ceiling cladding 3 of the helicopter, special holes 4 are provided, which are necessary to ensure the operability of the smoke detectors 1, and also fittings 5 are made for fasteners 6, for example, for bolts.

On the upper surface of the casing 3, above the holes 4, there are brackets 2, on which the sensors 1 are fixed. In this case, the width B of the bracket 2 is less than the length L of the holes 4. The holes 4 are closed from below with a decorative oval mesh 7, which is part of the ceiling sheathing 3 and lets air and smoke pass ...

Part of the smoke detectors 1 is located longitudinally in the direction of flight of the helicopter, and part transversely. Because the sensors 1 have an elongated shape, such an arrangement makes it possible to use everywhere the air masses in the helicopter compartment in order to control possible smoke.

At present, a smoke detector 1 is used, which contains a photoresistor (not shown). In the event of smoke penetrating through the plate surface of the housing, the resistance of the photoresistor decreases, and the current in its circuit increases so much that it triggers the alarm.

Smoke detectors 1 are connected to the onboard network, namely to the system control unit of the helicopter in accordance with its external connection diagram.

When smoke hits the sensitive element of sensor 1, it is triggered. A signal is sent to the control system of general helicopter equipment, which generates a signal about smoke in the cargo compartment. At the same time, in the cockpit on the fire protection panel, the signal panel "GRU3-PAS CABIN" is switched on and light and sound signals are given.

Claims (1)

A helicopter smoke warning device containing a smoke sensor, characterized in that the sensor body is attached to a bracket made in the form of a U-shaped plate, the width of the bracket being less than the length of the hole in the ceiling panel over which the bracket is fixed.

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