Closed air curtain cold-proof and heat-preserving special door structure of steam turbine power plant

Abstract

The invention relates to a steamer power plant closed air screen cold-proof heat-insulation extra large gate structure comprising a gate frame body and a wind-proof steel gate arranged outside the gate frame body; the inner side of the gate frame body are provided with at least two layers of air cold-proof roller shutters; a first gap is reserved between the air cold-proof roller shutters and the wind-proof steel gate; a second gap is formed between the air cold-proof roller shutters, thus forming a dual-layer or multilayer air heat insulation structure; the ground outside the gate frame body is a down slope, so a cold bridge can be prevented in outdoor; the connecting portion between the surrounding of the wind-proof steel gate and the gate frame body is provided with a sealing strip, thus forming an annular sealing insulation structure. The surface of an existing gate body is wrapped by an insulation layer, thus enlarging gate body thickness and size, and the gate is hard to be opened / closed, poor in sealing performance, and poor in insulation effect; the steamer power plant closed air screen cold-proof heat-insulation extra large gate structure can solve said problems, is small in gate size, convenient to open / close, good in sealing performance, and excellent in insulation effect.

Description

technical field [0001] The invention relates to a thermal insulation door structure, in particular to a closed air curtain cold-proof and thermal insulation special door structure for a steam turbine power plant, which is suitable for a nuclear power plant. It belongs to the technical field of building facilities. Background technique [0002] In the prior art, in order to meet the needs of equipment maintenance, the size of the gate of the nuclear power conventional island is very large. For example, the width*height of the main gate of the conventional island of cpr1000 nuclear power reaches 8m*10.5m. Such a huge door structure usually adopts a steel frame steel plate door, and an insulation layer is added in the cold and severe northern regions. The insulation layer is usually wrapped with 30mm thick glass wool felt outside the door, and the thermal resistance is R 总 =0.76(m 2 *k / W). The special gate of this structure has the following defects: (1) an outsourcing insul...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problems of adding an outsourcing insulation layer on the surface of the door body, increasing the thickness and volume of the door body, causing difficulties in opening / closing operations, poor airtight performance and poor heat preservation effect. Closed air curtain cold-proof and heat-resisting special door structure of turbine power plant

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