Installation Technology of Embedded Bolts in Cold Box of Large Air Separation Unit

Abstract

The invention provides a technology for installing pre-buried bolts to a large-scale air separation device cold box. The method comprises the following steps that 1, a foundation steel plate is pre-buried in a cushion layer of the air separation device cold box; 2, a support used for installing the pre-buried bolts is built on the foundation steel plate; 3, the pre-buried bolts are installed, wherein multiple distance formworks are fabricated, a first position point used for installing the corresponding pre-buried bolt is determined on any distance formwork, any distance formwork is welded to the upper end face of a box iron cross beam through angle iron, a through hole which penetrates through the box iron cross beam and is matched with the corresponding pre-buried bolt is formed in the first position point, and the corresponding pre-buried bolt is installed in the through hole; 4, welding seams are detected. According to the technology, the support is welded inside the large-scale air separation device cold box, the pre-buried bolts are installed on the box iron cross beams of the support, the support is utilized for achieving the overall support and reinforcement, and the installation of the pre-buried bolts is completed.

Description

technical field [0001] The invention belongs to the field of pre-embedded bolt installation, and in particular relates to a pre-embedded bolt installation process for a cold box of a large-scale air separation unit. Background technique [0002] The cold box of the air separation plant is an important foundation in the air separation plant, and the cold box is generally based on a reinforced concrete cushion. It is difficult to install pre-embedded bolts in the cold box of a large-scale air separation unit. The reasons are as follows: 1. The foundation of the cushion is large, and the concrete requires one-time pouring; 2. The foundation of the cold box has high antifreeze and impermeability 3. The embedded bolts of the equipment in the cold box foundation are group bolts, which need to be reinforced as a whole; 4. There are a large number of embedded bolts in the cold box foundation, which are in a suspended state. Contents of the invention [0003] In order to solve the...

AI Technical Summary

Problems solved by technology

It is difficult to install pre-embedded bolts in the cold box of a large-scale air separation unit. The reasons are as follows: 1. The foundation of the cushion is large, and the concrete requires one-time pouring; 2. The foundation of the cold box has high antifreeze and impermeability 3. The pre-embedded bolts of the equipment in the cold box foundation are group bolts and need to be reinforced as a whole; 4. There are a large number of pre-embedded bolts in the cold box foundation, which are in a suspended state

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