Anti-theft door breaking method by using freezing pressure of water and low-temperature cold brittleness of steel plate

An anti-theft door, steel plate technology, applied in the direction of preventing theft, anti-war damage, special equipment for doors/windows, etc., can solve problems such as hidden safety hazards, increased difficulty in demolition by firefighters, difficulty in rapid fire rescue work, etc., to improve efficiency. Effect
CN109184501AActive Publication Date: 2019-01-11CHINA UNIV OF MINING & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF MINING & TECH
Publication Date
2019-01-11

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Abstract

The invention discloses an anti-theft door breaking method by using freezing pressure of water and low-temperature cold brittleness of a steel plate. By determining the reasonable water injection position, strong restraint conditions are formed in a door body, and a water injection device is connected to perform water injection operation on an upper water injection hole and a lower water injectionhole respectively; liquid nitrogen is injected into the upper part and the lower part to form closed ice walls on the upper part and the lower part in the door body; according to the freezing critical point below the upper water injection hole at the critical position of frosting outside the door body steel plate, a second operation hole is constructed; water and liquid nitrogen are injected to the middle spaced space through the second operation hole, icing compression is thus formed in the middle closed area to enable the steel plate to be expanded and cracked and deformed, a door body lockpoint is separated from a door frame, and breaking is completed. The method mentioned in the invention can be executed by two rescue workers, wall breaking and door body cutting are not needed in thecase of rescue, the operation is safe and efficient, and the breaking efficiency is greatly improved.
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Description

technical field

[0001] The invention relates to a method for dismantling an anti-theft door, in particular to a method for dismantling an anti-theft door using the freezing pressure of water and the cold and brittle properties of steel plates at low temperature, and belongs to the technical field of fire protection and rescue. Background technique

[0002] As a building facility commonly installed in urban residential buildings, anti-theft safety doors are mostly extruded steel plates made of cold-rolled steel plates as the inner and outer door panels. The thickness is mostly 1.2 mm and 1.5 mm, with strong impact resistance, and has the functions of anti-theft, fire prevention, heat insulation, and sound insulation. The quality of the current anti-theft doors is produced in accordance with the national testing standard: GB 17565-2007 "General Technical Conditions for Anti-theft Safety Doors". This kind of anti-theft safety doors can greatly improve the safety factor of resid...

Claims

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