RU217295U1 - Hairpin for air ducts - Google Patents

Abstract

The utility model relates to the field of construction and can be used in the installation of air ducts and other heat-resistant structures. Stud-suspension for air ducts is made in the form of a metal rod tightly installed in a cylinder made of fire-retardant material containing 91.00-97.00 wt.% of basalt fiber with a fiber diameter of 0.5-10.0 μm. The technical result consists in expanding the arsenal of technical means that can be used in the installation of air ducts and increasing their operational reliability under conditions of thermal and fire exposure. 1 z.p. f-ly, 3 ill.

Description

The utility model relates to the field of construction and can be used in the installation of air ducts and other heat-resistant structures.

A device is known [RU 158537, U1, E21B 36/00, 01/10/2016], which includes at least two sections connected to each other by a coupling, and a glass, while each section contains an inner and outer pipe, between which a heat-insulating material is placed, the length of each inner pipe is greater than the length of each outer pipe, each inner pipe at both ends has a thread for connection by means of a coupling and fixed fixing flanges, each fixing flange consists of the first and second annular elements, between which there is a sealing ring that interacts with the outer surface of the inner pipe , and which are connected by means of fasteners, the outer surface of the fixing flanges is in contact with the inner and end surfaces of the outer pipe, while the first annular element has a protrusion along the edge to abut the end surface of the outer pipe into it, the sleeve is installed at the junction of the sections, and the space under glass filled with heat-insulating m material.

The disadvantage of this technical solution is the relatively high complexity.

The task that is solved in the utility model is to expand the arsenal of technical means that can be used in the installation of air ducts and are characterized by increased thermal and fire protection to the fire resistance limit Ei180.

The required technical result, which is achieved when using the utility model, is to increase the thermal and fire protection of technical means that can be used during the installation of air ducts.

The problem is solved, and the required technical result is achieved in that the metal suspension pin, made in the form of a metal rod with the possibility of fastening the lower end to the traverse, and the upper end to the means of fastening to the supporting structure, according to the utility model, the metal rod is tightly installed in the cylinder , from a fire-retardant material containing 91.00-97.00 wt.% basalt fiber with a fiber diameter of 0.5-10.0 microns. The traverse is protected by a fire retardant mat BSTV.

The fire-retardant material contains basalt fibers, a binder obtained by curing an aqueous composition, including polyvinyl alcohol, modified starch, silane, a water-repellent emulsion, a dust remover, and nano- or microparticles. The fire-retardant material has the following content, ratio, wt.%:

1) mineral fibers 91.00-97.00

2) binder 0.9-7.00

3) silane 0.01-0.20

4) hydrophobizing emulsion 0.10-1.40

5) deduster 0.10-1.00

The binder may further comprise a crosslinking agent. In addition, the required technical result is achieved by the fact that the cylinder of basalt fibers, in which the metal rod is tightly installed, is made with an inner diameter of 8, 10, 12 mm, a length of 1000 mm, a wall thickness of 20 mm, a density of at least 100 kg/ m ³ , but not more than 150 kg/m ³ .

The drawing shows:

in fig. 1 - hairpin-suspension with a demonstration of its application;

in fig. 2 - node A, shown in Fig. 1;

in fig. 3 - stud-suspension in section with a demonstration of its application.

The suspension pin is made in the form of a metal rod 1 tightly installed in a cylinder made of basalt fiber 2 with the help of steel ties 6, with the possibility of fastening the lower end to the traverse in fire protection 3, and the upper end to the means of fastening to the supporting structure for the air duct 5 in heat-resistant material 4.

An example of implementation is the use of a basalt cylinder 2, in which a metal rod 1 is tightly installed, with an inner diameter of 8, 10, 12 mm, a length of 1000 mm, a wall thickness of 20 mm, a density of at least 100 kg/m ³ , but not more than 150 kg / m ³ .

The stud-suspension for the duct is used as follows.

The metal rod 1 is made of metal and installed in a basalt cylinder 2 containing basalt mineral fibers with a diameter of 0.50 to 10.00 microns, a binder, water-repellent and modifying additives, for example, in the following ratio, wt.%: basalt mineral fibers 96, 00, binder 1.80, silane 0.20, hydrophobic emulsion 1.00, deduster 1.00.

The cylinder is basalt, maybe lined with non-reinforced aluminum foil or glued with aluminum foil on liquid glass, or without linings.

The basalt cylinder made of such material has good heat and fire protection characteristics.

According to the technical characteristics that are determined experimentally, this material has the following parameters:

water absorption at partial immersion, no more than 1.0 kg/m ² ;

humidity, % by weight, not more than 0.5;

sorption humidity for 24 hours, % by weight, no more than 2;

application temperature up to +900°С;

content of organic substances, % by weight, not more than 3.5;

ultimate strength not less than (kPa) 7.5;

compressive strength 10% deformation, not less than (kPa) 15;

vapor permeability (mg/m⋅hPa) 0.033;

water resistance (pH) - 3.

It has been experimentally established that basalt mineral fibers with a diameter of 0.50 to 10.00 µm can be used in the material, moreover, with diameters less than 0.5 µm and more than 10.00 µm, the effect of a noticeable decrease in the strength of the material, in particular, compressive strength, occurs. . The acidity modulus of the fiber should preferably be at least 1.8. As a dust remover can be used, in particular, acrylic-silicone impregnation. Phenol-formaldehyde resin, ammonium sulfate, oil emulsion, urea can be used as a binder. As water-repellent additives, oil and organosilicon compositions are used, which provide effective water-repellent properties of products.

In addition to the fact that the specified technical characteristics of the material are achieved even with possible slight deviations from the above quantitative characteristics of the components within the following wt.%: mineral fibers 91.00-97.00, binder 0.9-7.00, silane 0.01 -0.20, water-repellent emulsion 0.10-1.40, deduster 0.10-1.00.

The density of the product is provided not less than 100 kg/m ³ , but not more than 150 kg/m ³ , which is important for reducing the weight and size characteristics of the product.

In FIG. 2 shows section A of FIG. 1, where 1 is a hairpin; 2 - basalt cylinder; 3 - traverse; 7 - basalt mat from BSTV; 8 - nut; 9 - flame retardant adhesive composition NG.

Thus, the proposal achieves the required technical result, which consists in increasing the thermal and fire protection of technical means that can be used in the installation of air ducts, since the application temperature reaches +900°C.

Claims (2)

1. Stud-suspension for air ducts, made in the form of a metal rod, characterized in that the metal rod is tightly installed in a cylinder of fire-retardant material containing 91.00-97.00 wt.% basalt fiber with a fiber diameter of 0.5-10, 0 µm. 2. Stud-suspension for air ducts according to claim 1, characterized in that the basalt cylinder, in which the metal rod is tightly installed, is made with an inner diameter of 8, 10, 12 mm, a length of 1000 mm, with a wall thickness of 20 mm, a density of at least 100 kg/m ³ , but not more than 150 kg/m ³ .

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