CN201106736Y - Insulation against radiant and convective heat - Google Patents

Abstract

The thermal insulation layer for shielding radiation heat and convective heat of the utility model belongs to the thermal insulation structure, and is provided with thermal insulation layer, high temperature shielding layer, thermal insulation layer, low temperature shielding layer, thermal insulation layer and galvanized thin steel plate sequentially outside the insulated body. Ventilation holes are arranged on the high temperature shielding layer and the low temperature shielding layer. The high-temperature shielding layer is made of stainless steel sheet, and the low-temperature shielding layer is made of aluminum foil. Both materials are highly reflective of light and shield against thermal radiation. Both materials are dense materials that shield against thermal convection. The thermal insulation layer for shielding radiant heat and convective heat of the utility model has reasonable design, simple structure, effectively prevents radiant heat and convective heat, and has good thermal insulation effect.

Description

Insulation against radiant and convective heat

technical field

The utility model belongs to a thermal insulation structure, in particular to a thermal insulation layer shielding radiant heat and convective heat.

Background technique

At present, the thermal insulation structure of equipment and pipelines widely used in petrochemical enterprises is to cover the outer surface of equipment and pipelines with thermal insulation materials, and the outer surface of thermal insulation materials is protected by galvanized thin steel plates, as shown in Figure 1. In Fig. 1: 1 equipment and pipeline shell; 2 insulation layer; 3 galvanized thin steel plate. This structure utilizes the characteristics of the low heat conduction system of the insulation material, and achieves the purpose of heat preservation by blocking heat conduction. This structure is effective for heat preservation of equipment and pipelines with low temperature. However, the thermal insulation effect is not good when it is used for high-temperature equipment and pipelines. Although the designed thermal insulation layer is very thick, the temperature of the outer surface of the thermal insulation layer is still high, resulting in large heat loss and energy waste.

Contents of the invention

The utility model aims at overcoming the deficiencies of the prior art, and provides a thermal insulation layer with good thermal insulation effect for shielding radiant heat and convective heat.

The insulation layer for shielding radiant heat and convective heat of the utility model is that the outer wall of the insulated body is covered with an insulation layer and a galvanized thin steel plate in sequence, and a shielding layer is arranged in the insulation layer.

As a further improvement of the utility model, a high-temperature shielding layer and a low-temperature shielding layer are provided at intervals in the heat-insulation layer.

As a further improvement of the utility model, ventilation holes are opened on the high-temperature shielding layer and the low-temperature shielding layer.

This design applies the basic principles of heat transfer theory, and adds a shielding layer for radiant heat and convective heat in the traditional insulation layer. The high-temperature shielding layer is made of stainless steel sheet, and the low-temperature shielding layer is made of aluminum foil. Both materials are highly reflective of light and shield against thermal radiation. Both materials are dense materials that shield against thermal convection. The consumption of the two materials is small, the price is low, and the energy-saving effect is remarkable.

When high-temperature equipment and pipelines heat up, the air in the insulation material expands and needs to escape. When cooling high-temperature equipment and pipelines, the air cooling and shrinkage in the insulation material needs to be replenished. In order to facilitate the flow of air in the insulation material due to volume expansion and cold contraction, the materials of the two high-temperature shielding layers used in this technology are provided with small ventilation holes to avoid damage to the shielding layer. The area ratio of the ventilation holes is small, and the convective heat loss through the holes is small.

The thermal insulation layer for shielding radiant heat and convective heat of the utility model has reasonable design, simple structure, effectively prevents radiant heat and convective heat, and has good thermal insulation effect.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the existing thermal insulation layer.

Fig. 2 is a structural schematic diagram of the thermal insulation layer shielding radiant heat and convective heat of the present invention.

Fig. 3 is a structural schematic diagram of a high-temperature shielding layer and a low-temperature shielding layer respectively provided in the thermal insulation layer for shielding radiant heat and convective heat of the present invention.

Fig. 4 is a schematic diagram of the structure of the high-temperature shielding layer of the thermal insulation layer shielding radiant heat and convective heat of the present invention.

Fig. 5 is a structural schematic diagram of the low-temperature shielding layer of the thermal insulation layer shielding radiant heat and convective heat of the present invention.

Detailed ways

Example 1

The thermal insulation layer for shielding radiant heat and convective heat of the present utility model, as shown in Figure 2, is to be coated with thermal insulation layer 2, shielding layer 4, thermal insulation layer 2, galvanized thin steel plate 3 successively on the outer wall of insulated body 1 and constitute.

Example 2

The thermal insulation layer for shielding radiation heat and convective heat of the present utility model, as shown in Figure 3, is to be provided with thermal insulation layer 2, high temperature shielding layer 5, thermal insulation layer 2, low temperature shielding layer 6, thermal insulation layer successively outside the insulated body 1 2 and galvanized sheet steel 3. Two shields provide protection against radiant and convective heat. On the high temperature shielding layer 5 and the low temperature shielding layer 6, ventilation holes 7 are evenly opened respectively, as shown in Fig. 4 and Fig. 5 . When the high-temperature equipment and pipelines heat up, the heat-insulating material heats up accordingly, and the air in the gaps of the heat-insulating material expands due to heat, and can diffuse out through the ventilation hole 7, so as to avoid the outward swelling and deformation of the shielding layer. When the high-temperature equipment and pipeline cool down, the insulation material will cool down accordingly. The air in the gaps of the insulation material cools and shrinks, and the external air is replenished through the vent holes to prevent the shielding layer from being deformed by the external pressure of the gas.

Claims (6)

1. The thermal insulation layer for shielding radiant heat and convective heat is composed of thermal insulation layer (2) and galvanized thin steel plate (3) successively coated on the outer wall of the insulated body (1). With shielding (4). 2. The thermal insulation layer for shielding radiant heat and convective heat according to claim 1, characterized in that a high-temperature shielding layer (5) and a low-temperature shielding layer (6) are arranged at intervals in the thermal insulation layer (2). 3. The thermal insulation layer for shielding radiant heat and convective heat as claimed in claim 1 or 2, characterized in that an insulation layer ( 2), a high-temperature shielding layer (5), an insulating layer (2), a low-temperature shielding layer (6), and an insulating layer (2). 4. The insulation layer for shielding radiant heat and convective heat according to claim 2, characterized in that ventilation holes (7) are provided on both the high-temperature shielding layer (5) and the low-temperature shielding layer (6). 5. The thermal insulation layer for shielding radiant heat and convective heat according to claim 2, characterized in that the high temperature shielding layer (5) is made of stainless steel sheet. 6. The thermal insulation layer for shielding radiant heat and convective heat according to claim 2, characterized in that the low-temperature shielding layer (6) is made of aluminum foil.

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