Reinforcing device for refractory air duct for nuclear power and refractory air duct

Abstract

A reinforcement device for a fire-resistant air duct for nuclear power and a fire-resistant air duct. The reinforcement device includes an upper top plate, a lower top plate, an upper support rod, a lower support rod, an intermediate connecting rod, an upper mounting plate, and a lower mounting plate; the upper end of the upper support rod is connected with the upper top plate, the lower end passes through the upper mounting plate and It is adjustable connected with the upper end of the intermediate connecting rod; the lower end of the lower support rod is connected with the lower top plate, the upper end passes through the lower mounting plate and is adjustable connected with the lower end of the intermediate connecting rod; the upper mounting plate is in at least one dimension The size on the top is greater than the size of the upper roof in the corresponding dimension; the size of the lower mounting plate in at least one dimension is greater than the size of the lower roof in the corresponding dimension; the upper roof and the lower roof are respectively connected with the fire-resistant air duct The top wall and the bottom wall abut; the upper mounting plate and the lower mounting plate are respectively fixed to the top wall and the bottom wall in the fire-resistant air duct. The reinforcement device enables the fire-resistant air duct to be effectively supported, strengthens the strength of the fire-resistant air duct, and ensures the integrity of the ventilation system.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety, in particular to the technical field of fire-resistant air ducts for nuclear power, and relates to a reinforcement device for fire-resistant air ducts for nuclear power and a fire-resistant air duct. Background technique [0002] At present, a fire-resistant air duct made of calcium carbonate is usually used in the ventilation system of the nuclear island of the domestic PWR nuclear power plant (such as DVC, DVE, DVG, DVH, etc.). The fire-resistant air duct has a certain fire resistance due to the material itself, so as to ensure that the ventilation system can remain intact within a certain fire time. This fire-resistant air duct is made of PROMATECT-L500 single-layer fireproof board 1', using "PROMACOL S" glue for joint sealing, and metal horse nails 3' for assembly (see figure 1 , figure 1 shows the structure of the refractory air duct). Wherein, the lower fireproof board...

AI Technical Summary

Problems solved by technology

Since the upper fireproof board 1' is only supported by the fireproof boards 1' on both sides, when one side of the upper fireproof board 1' is longer, it is difficult for the fireproof boards 1' on both sides to effectively support the upper part. If there is no effective support inside the air duct, the upper fire-resistant board 1' is easily sunken or bent in the middle due to its own gravity, resulting in weakened overall strength of the upper fire-resistant air duct

In addition, the pressure inside the fire-resistant air duct is fluctuating in an unsteady state, which intensifies the risk of cracks or even collapse in the middle position of the upper fire-proof board 1', which will further weaken the strength of the fire-resistant air duct after long-term operation

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