PL66544Y1 - Roll-up fire baffle - Google Patents

Description

2 PL 66 544 Υ1

Pattern description

The object of the utility model is a retractable fire barrier, preferably for door and window openings, commonly used to close communication openings in the walls of buildings and to protect rooms against the spread of fire.

Various solutions of fire gates and partitions are well known. The most common solution is the use of sliding, massive gates made of boards and insulating materials, sliding horizontally or vertically. The use of this type of solutions, due to their uniform and massive structure, is possible only in those places where there is free space next to or above the communication opening enabling the placement of this structure. Thus, for example, from the description of the invention application No. 334966 (BUP 04/2000), a "fire gate drive" is known, characterized in that the leaf plate is adjustable in a vertical plane. Under normal conditions, the gate is permanently open, and the leaf is above its jamb and is fixed in this position by means of a detachable fusible lock. In order to limit the falling speed, the leaf is suspended on a brake string equipped with a weight.

The massive structure of fire gates and the need to use specialized drive systems meant that in rooms where the intensity of a potential fire should not be very high, solutions in the form of rolled fire partitions are used, ensuring only fire tightness (E). These solutions usually do not have such technical parameters as uniform and massive fire gates, but in most of their applications they fulfill their basic fire function - they limit the speed of fire spread and are easy to install in all conditions. Thus, for example, from the description of the invention, drift no. 356353 (BUP 07/2004), a "retractable fire protection partition" is known, characterized in that it has the form of a flexible fireproof fabric curtain which serves to close an opening in a building wall. Both side edges of the curtain are slidably mounted in two fixed roller guides placed parallel to the sides of the opening. The upper rim of the curtain is attached to a rotating shaft which is bearing in a housing attached to the wall lintel. The inside of the guide is in the form of a vertical groove with a bottom, where part of the groove is formed by two ribs.

On the other hand, in the invention application no. 350541 (BUP 13/2002) a "sectional fire door" is presented, characterized by the fact that it consists of a series of articulated, non-jacketed segments in the form of insulation panels. These boards are made of fireproof material, preferably mineral wool. Metal pads adhere to the opposite side edges of each panel and are permanently attached to it with a glue joint, pins or tie rods. Each plate has guides on the sides in the form of rolling rollers protruding from its pads. Roller guides are staggered in fixed rail guides. The pads of the adjacent plates are articulated with each other. Contact locks are formed on the adjacent front edges of adjacent panels.

The curtain plane is the most important and critical element of roll-up fire partitions. The type and parameters of this element are the basic factor determining the effectiveness of fire protection. These curtains must have very high isothermal parameters as well as be fireproof. Hitherto, attempts have been made to combine two layers of such fabrics in order to obtain a uniform, flexible material wound on a rotating shaft. However, these solutions did not give the desired result, mainly due to the wrinkling of the material, resulting from the fact that the curtain wrapped on the rotating shaft wrinkled and lost its functional parameters. Additionally, it was not flexible enough to be wound on rolls.

A retractable fire barrier in the form of a flexible fireproof curtain attached to a horizontal, rotating shaft mounted above an opening in a building wall, is characterized by two curtains, each of them placed on a different rotating shaft. Each curtain is made of two independent layers of elastic fabric, one of which is a fireproof layer, and the other is a heat-insulating layer. Both layers are connected with each other in the curtain in its lower part by a horizontal connector. There is an airbag in the zone between the two curtains.

Claims (1)

3 PL 66 544 Υ1 The described solution presents a new, simple structure of curtains, which enables the construction of flexible, rolled, fire-resistant fire partitions with high isothermal parameters. The developed solution, which uses two layers of fabric (a fireproof layer and a heat-insulating layer) wound on a common rotating shaft - allows the use of standard and easily available materials in the partitions (e.g. specialized glass fiber fabrics reinforced with stainless steel wire) as a flexible fabric providing fire tightness and, for example, mineral wool, as the second layer of fabric that ensures the barrier thermal tightness. During the winding of both layers on their common rotating shaft, no unnecessary stresses in the materials are created, no damage or loss of their insulating properties. The solution with two raised curtains shown in the figure is more effective than a fire barrier consisting of only one curtain, mainly due to the formation of the so-called airbag in the zone between these curtains, additionally delaying the spread of the fire. The developed solution - with the use of simple technical measures - ensures very effective thermal insulation of rooms and ensures its effective operation during a fire. The foldable fire protection barrier, according to the developed pattern, is shown in more detail in the drawings, in which Fig. 1 - shows an unfolded and lowered fire barrier, and Fig. 2 - shows a view of one of the shafts with a curtain wound thereon. As shown in the figures, the basic elements of a roll-up firewall are two curtains 1, each attached to a rotating shaft 2 or to a drum applied to shaft 2. Each curtain 1 consists of two layers: a fireproof layer 3 and a heat-insulating layer 4, which are connected by horizontally with each other only in two places: in the highest point of curtain 1 and in the lowest point of curtain 1. At the lowest point of connecting the fireproof layer 3 with the heat-insulating layer 4, there is a horizontal connector 5 connecting them, which is also the weight of the curtain 1. The fireproof layer 3 is a flexible fabric ensuring fire tightness, while the heat-insulating layer 4 is made of a mineral wool mat. Fire-resistant layers 3 are placed on the outside of a rolled fire barrier, while heat-insulating layers 4 are placed on the inside of the structure. The distance between the curtains 1 is individually adjusted to the properties of the materials used, the size and shape of the protected communication opening and the fire hazard characteristics. In a situation where the partition is not used, both curtains 1 are wound on shafts 2. In this position, in the lower part of the heat-insulating layer 4, near the connector 5 of each curtain 1, a small fold 6 is formed, which is an excess of fabric, preventing stresses after unfolding and lowering the partition. The folds 6 are stretched after the curtains 1 unfold. The size and shape of the folds 6 depends on the thickness of the curtains 1 and their length. Protective caveat A roll-up fire barrier in the form of a flexible fireproof curtain attached to a horizontal, rotating shaft mounted above an opening in a building wall, characterized in that it is composed of two curtains (1), each of them placed on a different rotating shaft (2), each curtain (1) is made of two layers of elastic fabric, one of which is a fireproof layer (3), the other is a heat-insulating layer (4), and both layers (3, 4) are joined together in the curtain (1) in its lower part with a horizontal connector (5), where in the area between the curtains (1) there is an airbag, and the layers (3, 4) of elastic fabric in the curtains (1) are independent