SU1440507A1 - Fireproof curtain for air ducts - Google Patents

Abstract

The invention relates to fire fighting equipment, namely, devices for preventing the spread of flames and sparks in air ducts through which combustible plastic or fiber is transported. The purpose of the invention is to improve the reliability of fire protection due to the use of flame penetration and sparks from the air duct into the equipment. I ignite

Description

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The ducting device has a housing 1 with flanges 2 and 3 for fastening it. In the case on the vertical axis 4 and 5 axes are rigidly fixed with the possibility of rotation in opposite directions two plates 6 and 7, kinematically interconnected by means of a lever-hinge mechanism 8. On the vertical axis 4, an additional Rag 9. The body also has a mechanism 10 for fixing the plates in the closed position and means 11 for setting the plates at a given angle. In addition, in the casing there is a fixed sash 13 fixed on the axis 12, which is placed in front of the plates 6 and 7 in the direction of air movement. Axis 12 is rigidly attached

FIELD OF THE INVENTION The invention relates to fire fighting equipment, in particular, to devices for preventing the spread of flames and sparks in ducts through which combustible dusts or fibers are transported.

The purpose of the invention is to increase the reliability of fire protection by eliminating the leakage of flames and sparks from the duct into the equipment.

Figure 1 shows the device under normal operating conditions, i.e. when passing through it dusty air; Fig. 2 is the same in the event of a dust explosion in the equipment, for example in the filter to which this device is attached; in FIG. 3 - the same, after the signal arrives at the actuator, there is a source of fire or sparks in the duct.

The fire barrier device for ducting includes a housing 1 with flanges 2 and 3 for fastening it. In the housing on vertical axes x 4, 5, two plates 6 and 7 are rigidly fixed with the possibility of rotation in opposite directions, kinematically interconnected by means of a lever-hinge mechanism 8. On the vertical 14, between the plates and the sash, there is an actuator with a lever-ball world system, interacting with the lever 14 and the additional lever 9. The lever-hinged system is made in the form of levers 15, 16 and 17. The lever 15 is hingedly connected to the lever 14 of the flap 13 and is spring-loaded relative to the lever 16 by the spring 18, and the lever 17 is two-armed, tanovlen to axis 19 and cooperating with a further shoulder 0 9. The actuator arm can be configured electrically, hydraulically or pneumatically. The fixture may be equipped with a fire detection sensor connected via a switch-on unit to the drive. 1 hp f-ly. 3 il.

An additional lever 9 is rigidly fixed to the th axis 4. The mechanism 10 also holds the plates for fixing the plates in the closed position and the means 11 for installing the plates at a predetermined angle. In addition, in the casing there is a shutter 13 fixed on the axis 12, which is placed in front of the plates 6 and 7 in the direction of air movement. A lever 14 is rigidly attached to the axis 12. Between the plates and the leaf there is an actuator with a lever-hinge system that interacts with the lever 14 and the additional lever 9. The lever-hinge system is designed as levers 15, 16 and 17. Lever 15; pivotally connected to the lever 14 of the flap 1 3 and is spring-loaded relative to the lever 16 by the spring 18, and the lever 17 is made two shoulders, mounted on the axis 19 and communicates the arm 20 with an additional lever 9.

The drive can be electric, hydraulic or pneumatic.

The fixture may be equipped with a fire detection sensor, connected via a switching unit with a drive (not shown).

The device works as follows.

In the event of an explosion, a high-speed air flow occurs in the housing of the device, directed against the movement of the air that was fed into the duct prior to the explosion. The air flow, affecting the plates 6 and 7, causes them to rotate together with the axes 4, 5 until the plates reach the mechanism of their fixation in the closed position. In this case, the plates completely overlap the flow area of the housing 1. When sparks appear in the duct, an actuator is activated that acts on the pivotally connected levers 15 and 16 and, overcoming the force of the spring 18, moves them to the position at which the flap 13 blocks the flow area of the housing 1. At the same time, due to the interaction of the lever 17 with the additional lever 9, the plates 6 and 7 are closed.

Claims (2)

1. Fire extinguishing device for ducts, containing body with rigidly fixed on it on vertical axes x with the possibility of rotation in opposite directions by plates, mechanism for fixing the plate stin in the closed position and means of mounting the plates at a predetermined angle, characterized in that, in order to increase the reliability 0 fire protection equipment by eliminating the breakthrough of the flame and sparks from the air duct into the equipment, it is equipped with the installed in the case in front of the plates in the course of the air movement 5 with a lever, an additional lever rigidly mounted on one of the vertical axes, and a drive with a lever-articulated system, which interacts with the lever of the sash and an additional lever. 2. Flame retardant device POP.1, characterized by 5 in that the lever-hinge system is made up of three levers, the first of which is hingedly connected to the leaf lever and spring-loaded with respect to the second lever, and the third 0 the lever is made of two shoulders with the possibility of interaction with the free shoulder with an additional lever.