A process for segmental pre-installation of super-large diameter bimetallic casting mud pipe without closing pipes
A super-large diameter, bi-metal technology, which is applied in the field of super-large diameter bi-metal casting mud pipe segmental pre-installation without closing pipes, can solve the problems of poor weldability, heavy quality, large outline volume, etc., and achieves improved processing and The effect of installation accuracy, improving installation efficiency and reducing labor intensity
Active Publication Date: 2016-04-13
招商局邮轮制造有限公司 +1
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Problems solved by technology
[0004] The biggest feature of the super-large-diameter bimetal casting mud pipe is its long service life, but the weldability of the mud pipe material is poor, and its shape and volume are relatively large (generally 1 to 3m 3 Between), its quality is heavy (generally between 3 ~ 5t)
Therefore, it is not suitable to carry out research, cutting, welding and other closing work on the bimetal casting clay pipe with a margin on site, that is to say, it is impossible to implement the process requirements of segmental pre-installation and setting of the closing pipe
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[0020] The present invention will be further described below in conjunction with actual drawings.
[0021] The 11000m 3 The dredger is equipped with 20 mud tanks and a mud pipe channel on the hull structure, and a set of mud tank suction piping system composed of super large-diameter bimetal casting mud pipes is set in the mud pipe channel. According to the requirements of the shipbuilding process, the hull structure is divided into 10 hull sections on the mud tank, and each hull segment has two mud tanks, a section of mud pipe channel and a set of six super-large-diameter bimetal casting mud pipes. mud tank suction pipe group, and the number and specifications of mud pipes in the mud tank suction pipe group on each hull section are the same, such as figure 1 shown.
[0022] After the construction of the hull sections is completed, the mud pipes in each hull section need to be pre-installed, see figure 2 . Due to the super large-diameter bimetal casting mud pipe, it is im...
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The invention relates to an ultra-large-diameter bimetallic casting cement tube segmentation and pre-installation non-closure-tube process. A hull is divided into more than two segments, and cement tubes on the segments are subjected to three-dimensional lofting to determine the production and installation dimensions; according to the production dimension determined by the three-dimensional lofting, cement tube blanks on a paying-off platform are positioned so that a machining line and a detecting line of the cement tube blanks are determined; a port cement cabin connecting tube, a cement cabin connecting four-way, and a starboard cement cabin connecting tube are subjected to finish machining, and a port cement cabin suction tube, a cement cabin main suction tube, and a starboard cement cabin suction tube are subjected to rough machining to reserve a machining allowance; according to the installation dimension determined by the three-dimensional lofting, a set of installation jig frames is produced in a workshop, the machined cement tubes are pre-installed on the installation jig frames, and then are subjected to finish machining to complete the pre-installation of the jig frames; a total station laser measuring instrument is used for measuring the finished hull segments, a closure opening is measured and checked, and then the closure is carried out. The machining and installation precision is improved, and the installation efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a process for segmental pre-installation of super-large-caliber bimetal casting mud pipes without closing pipes. Background technique [0002] At present, in shipbuilding, the pre-installed small-diameter pipelines and medium-diameter pipelines in the hull sections are controlled by three-dimensional lofting design and construction accuracy, and it is allowed to take part of the medium-diameter and small-diameter pipelines when the hull sections are closed. Necessary adjustments and modifications have reached the technological requirements of segmental pre-installation without closing tubes (that is, closing without margin). However, for large-diameter pipelines and super-large-diameter pipelines, they only account for about 10% of the pipeline consumption of the entire ship according to their length, and the pipes generally use materials with better weldability. Therefore,...
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IPC IPC(8): B63B9/00
Inventor 耿传兴陈海林
Owner 招商局邮轮制造有限公司