CN2391077Y

CN2391077Y - Composite modified magnesite ventilating duct

Info

Publication number: CN2391077Y
Application number: CN 99246566
Authority: CN
Inventors: 朱玉杰; 吴立庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-28
Filing date: 1999-09-28
Publication date: 2000-08-09
Anticipated expiration: 2009-09-28

Abstract

The utility model relates to a ventilating duct made of magnesite cement. The ventilating duct body is formed by fixedly connecting at least an inner layer with an outer layer, wherein, the inner layer 2 forms a high-strength water-proof layer made by modified magnesite cement and reinforcement fiber cloth, the outer layer 1 is formed by modifier modified magnesite cement and fiber cloth, and a heat-insulating layer 3 can be also additionally arranged between the inner layer and the outer layer. The utility model has the advantages of thin wall, high intensity, good toughness, water prevention, moisture absorption prevention, hygroscopicity prevention, etc. The utility model is especially suitable for air blowing of a central air-conditioning.

Description

Combined type modified magnesite ventilation duct

The utility model belongs to a kind of pipeline that is used for forced air supply, is particularly suitable for sending as central air-conditioner the ventilation duct of cold air or warm braw.

Ventilation duct is to be used for carrying the pipeline of forcing wind, the ventilation duct that has metallic material to make, the ventilation duct that also has nonmetallic material to make.According to the environment that uses, the difference in place, also different to the ventilation duct performance demands.For the employed supply air duct of central air conditioning equipment, because during the broiling summer, by this pipeline to indoor conveying cold air, in the winter of cold, pass through this pipeline again to indoor heat air delivery, therefore employed ventilation duct all has certain requirement at aspect of performances such as material, intensity.At present, central air-conditioner uses more general ventilation duct to manufacture with galvanized iron sheet both at home and abroad.Because this ventilation duct will install in a humid environment inevitably, particularly when carrying cold air summer, dewfall ponding easily on the pipeline of low temperature, burn into damages ventilation duct.Moreover the thermal insulation property of the galvanized iron sheet ventilation duct of thin-walled is poor, also can produce noise when wind speed is very fast.In a single day this ventilation duct is processed, installs bad, also air leakage phenomena can occur.In order to overcome above-mentioned shortcoming, people have invented nonmetal ventilation duct, as the ventilation duct made from magnesite cement.Because make the magnesite cement goods of this ventilation duct the moisture absorption arranged, return halogen, many shortcomings such as distortion, not water-fast, embrittlement, placed restrictions on promoting the use of of this ventilation duct equally.

The purpose of this utility model be to provide a kind of rational in infrastructure, intensity is high, distortion is little, water-fast, and modified magnesite cementitious composite ventilation duct that can anti-damp suction surface halide accumulation.

The utility model is to realize like this.Temperature and ambient temperature, the humidity of considering wind that this ventilation duct is carried have bigger difference; the inner and outer wall that is to say ventilation duct is to be in two kinds of different temperature environments; the body of this ventilation duct manufactured have inside and outside two-layer fixedly connected formation at least; its internal layer is the high-strength waterproof layer of being made by modified magnesite cement and cloth of reinforcement fibers, and skin is to be made of the protective layer that modified magnesite cement and fibre cloth are made.

When this ventilation duct being had special insulation require, can also between the internal layer of this ventilation duct and skin, establish one deck thermal insulation layer and constitute.Can stop heat exchange between ventilation duct inwall and the outer wall by this thermal insulation layer.

Because the tube wall of this ventilation duct at least by the magnesite cement manufacturing of inside and outside two-layer heterogeneity, makes the inwall of pipeline have the better waterproof energy, higher intensity and moisture-absorption and halogenation resistant energy preferably.And skin has toughness and erosion-resisting characteristics preferably, and is more reasonable on the structure.Make the cost of this ventilation duct also lower.Moreover, between inside and outside layer, increase one deck thermal insulation layer, the thermal insulation property of this ventilation duct is greatly improved again, the using scope of this ventilation duct is more wide.

Fig. 1 is the structure principle chart of this ventilation duct;

Fig. 2 is the embodiment of A-A section double-layer structure among Fig. 1;

Fig. 3 is the embodiment of A-A section three-decker among Fig. 1.

This combined type modified magnesite ventilation duct mainly is to make with magnesite cement, the body of its ventilation duct two-layerly fixedly connectedly is made of inside and outside at least, the component of internal layer 2 is except that magnesite, magnesium chloride and common fillers, also be added with anti-water, resistance to deformation agent and anti-damp suction surface halide accumulation agent such as the special-purpose waterproof powder of magnesite, and use cloth of reinforcement fibers as skeleton, make it to become and have high-intensity watertightness barrier.Here the addition of said waterproof powder is generally water chestnut and covers with mat about the 20-30% of native weight.The addition of other materials is used routinely.The skin 1 of this ventilation duct body is a protective layer, and its component is for to add anti-damp suction surface halide accumulation agent and resistance to deformation agent again except that magnesite, magnesium chloride, filler, and employed skeleton is general fibre cloth or alkali proof fiber cloth.Can also add various pigment in the skin 1 of this pipeline, make the ventilation duct of different colours.

The heat insulation type ventilation duct is to be provided with a thermal insulation layer 3 to constitute between internal layer 2 and outer 1.Thermal insulation layer 3 employed materials can be layer of polystyrene foam or thermal insulating materials such as various glass wool, rock cotton board and Foamex.

This ventilation duct can be made pipe, also can make square tube, bend pipe and various pipe joints etc.

Claims

1, combined type modified magnesite ventilation duct; it is characterized in that: the body of this ventilation duct has inside and outside two-layer fixedly connected formation at least; its internal layer (2) is the high-strength waterproof layer of being made by modified magnesite cement and cloth of reinforcement fibers, and the protective layer that outer (1) is made by modified magnesite cement and fibre cloth constitutes.

2, combined type modified magnesite ventilation duct according to claim 1 is characterized in that: be provided with a thermal insulation layer (3) and constitute between internal layer (2) and outer (1).