CN2472040Y - Improved composite thermal insulating material - Google Patents

Abstract

The utility model relates to the improvement of thermal insulation materials such as thermal pipes or containers, which are characterized in that the thermal insulation inner layer and the thermal insulation outer layer are compounded, and the thermal insulation inner layer has at least one layer of rock wool, mineral wool or aluminum silicate Composed of fiber, the outer heat preservation layer is glass fiber. The respective advantages of the two materials are fully utilized to complement each other, so that the comprehensive performance of the thermal insulation product is greatly improved.

Description

An Improved Composite Thermal Insulation Material

The utility model relates to the improvement of externally applied thermal insulation materials such as thermal pipes or containers.

For thermal insulation of thermal pipes or containers, or for thermal insulation of refrigeration pipes, single-layer rock wool, mineral wool, aluminum silicate fiber or glass fiber is usually used to make insulation pipes or insulation boards. However, single-layer insulation materials cannot achieve ideal insulation effects due to their inherent shortcomings. For example, aluminum silicate fiber, rock wool, and mineral wool are not only irritating to the skin, but also have relatively high thermal conductivity and bulk density, poor waterproof performance, easy to absorb moisture and become soft, not resistant to storage, low strength after molding, and many consumables. In a humid environment, the thermal insulation performance drops greatly, so the heat loss is large; the temperature resistance of glass fiber is poor, generally it can only be used for thermal pipe or container insulation at about 100 °C, and it cannot be used for higher temperatures above 100 °C.

The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide an improved composite thermal insulation material with low price, wide application range, high product strength, good thermal insulation performance and excellent comprehensive performance.

The purpose of the utility model is realized, and the basic idea is to make the advantages and disadvantages of the insulation materials complement each other to form a new type of composite insulation material that can be used in high temperature environments, has high product strength, and good insulation performance. Specifically, the utility model composite thermal insulation material is characterized in that it is composed of an inner thermal insulation layer and an outer thermal insulation layer, the inner thermal insulation layer is composed of at least one layer of rock wool, mineral wool or aluminum silicate fiber, and the outer thermal insulation layer is glass fiber. The utility model thermal insulation inner layer can choose rock wool, mineral wool or aluminum silicate fiber, or their composites according to different operating temperatures. Rock wool or mineral wool can be used as the inner layer of the insulation body below 300 °C, and aluminum silicate fiber can be used for the insulation body above 300 °C. The thickness of the insulation layer depends on the use temperature, generally 4-20cm. If the temperature of the insulation body is low, a single inner layer structure can be used, and if the temperature of the insulation body is high, a double inner layer should be used. The thickness of the glass fiber insulation outer layer is preferably 15-40% of the total thickness, preferably 20-30%. The glass fiber mentioned in the utility model includes centrifugal glass fiber and superfine glass fiber.

Below in conjunction with the description of several non-limiting embodiments, further illustrate the utility model.

Figure 1 is a schematic diagram of the cross-sectional structure of the composite structure insulation pipe.

Fig. 2 is a schematic diagram of the structure of a composite structure plate-shaped insulation block.

Example 1: Referring to Figure 1, taking the temperature of the insulation body at 300°C as an example, rock wool is first rolled into an insulation inner layer 1 with a wall thickness of 12cm, cured at 220°C for 1 hour, and then coated with 2cm of glass fiber 2. Curing and setting at 140°C for 40 minutes.

Example 2: Aluminum silicate fiber is rolled into a thermal insulation inner layer with a wall thickness of 5 cm, cured at 250 ° C for 1 hour, and then coated with 1.5 cm glass fiber and cured at 150-160 ° C for 40 minutes.

Example 3: Aluminum silicate is rolled into a thermal insulation inner layer with a wall thickness of 4 cm. After being cured and shaped at 250°C, 4 cm of mineral wool or rock wool is then wrapped. Curing and setting at 135°C.

Embodiment 4: Referring to Fig. 2, taking an insulation body temperature of 500°C as an example, aluminum silicate fibers are piled up to form a 14cm-thick insulation board 3, and after thermosetting and shaping, they are covered with 6cm of glass fiber 4 for thermosetting and shaping.

The utility model adopts high-temperature-resistant rock wool, mineral wool or aluminum silicate fiber insulation material as the inner layer, and the outer composite is cheap, has low thermal conductivity, and the non-hygroscopic glass fiber is used as the outer layer, making full use of the respective advantages of the two materials , and at the same time overcome the shortcomings of the two materials and make them complementary, so that the performance of thermal insulation products is greatly improved. Compared with the existing technology, not only the overall thermal conductivity is lower, but also the thermal insulation performance is good, which can be used for various temperature insulation, and the waterproof performance is good, the moisture absorption is good, the storage performance is good, the rigidity and structural strength are high, and it can withstand multiple moves. Low cost, beautiful appearance, no loss, low cost, convenient construction and cladding. The utility model can be made into a plate shape, a tube shape, a strip shape or a tile shape, and is used for external heat preservation of various high-temperature heat pipes or containers. It can be laid overhead, but also suitable for direct burial or trench laying, and is also suitable for heat insulation projects of refrigeration pipelines .

The glass fiber or glass wool mentioned in the utility model are synonyms.

Claims (5)

1. A composite thermal insulation material, characterized in that it is composed of an inner thermal insulation layer and an outer thermal insulation layer. The inner thermal insulation layer is composed of at least one layer of rock wool, mineral wool or aluminum silicate fiber, and the outer thermal insulation layer is made of glass fiber. 2. The composite thermal insulation material according to claim 1, characterized in that the thickness of the composite thermal insulation material is 4-20cm. 3. The composite thermal insulation material according to claim 1, characterized in that said outer layer accounts for 15-40% of the total thickness. 4. The composite thermal insulation material according to claim 3, wherein said outer layer accounts for 20-30% of the total thickness. 5. The composite thermal insulation material according to claim 1, characterized in that said glass fiber is centrifugal glass wool.

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