Lofting and unfolding method for steel outfitting pipe

A technology of iron outfitting and unfolding diagram, which is applied to ships and other directions, can solve the problem of insufficient deployment accuracy of iron outfitting tubes, and achieve the effect of improving the lofting deployment accuracy and ensuring the connection accuracy.

Active Publication Date: 2021-09-24
JIANGNAN SHIPYARD GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a method for lofting and unfolding of iron outfitting pipes to solve the technical problem of insufficient precision in the lofting and unfolding of iron outfitting pipes

Method used

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  • Lofting and unfolding method for steel outfitting pipe
  • Lofting and unfolding method for steel outfitting pipe
  • Lofting and unfolding method for steel outfitting pipe

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specific Embodiment

[0057] Specific embodiments, this embodiment will be described in detail by taking N=12 and the center point o' of the upper end surface of the tapered pipe 20 as a reference point example. Such as Figure 1-Figure 9 As shown, a method for lofting and expanding an iron outfitting pipe, the iron outfitting pipe includes a cylindrical pipe 10 and a tapered pipe 20 connected in series, the method includes:

[0058] S1: if figure 1 , figure 2 As shown, according to the technical requirements for the design and manufacture of iron outfitting pipes for marine accessories, the front view and side view of the outer contour of the cylindrical pipe 10 and the conical pipe 20 are obtained.

[0059] S21: if Figure 4 As shown, in the front view, first take the center point o' of the upper end surface of the tapered pipe 20 (the upper end surface of the tapered pipe 20 refers to the upper nozzle of the tapered pipe 20) as the center of the circle, and the upper end surface of the taper...

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Abstract

The invention discloses a lofting and unfolding method for a steel outfitting pipe in the technical field of ship pipeline connection. The lofting and unfolding method comprises the following steps: acquiring a front view and a side view, making equal reference circles on the front view and the side view, acquiring an intersecting line and girth by utilizing a prime line method, and acquiring a lower boundary of a lofting and unfolding view of a conical pipe and an intersecting line trepanning sample drawing of a cylindrical pipe by utilizing the prime line method. According to the method, the intersecting line of the conical pipe and the cylindrical pipe is obtained by making the equal reference circle in the front view and the side view of the conical pipe in cooperation with the prime line method, and then the lower boundary of the lofting expansion drawing of the conical pipe and the intersecting line trepanning sample drawing of the lofting expansion drawing of the cylindrical pipe are obtained through the prime line method, so that the lofting expansion precision of the iron outfitting pipe is improved, and the connection precision of the conical pipe and the cylindrical pipe is ensured.

Description

technical field [0001] The invention relates to the technical field of ship pipeline connection, in particular to a lofting and unfolding method for iron outfitting pipes. Background technique [0002] In the process of ship construction, a large number of piping systems and connecting fittings that run through the internal structure of the hull need to be accurately docked through iron outfitting pipes to make the piping structure more precise and reduce on-site repairs and replacements, and facilitate the closure of large general sections When the pipe system butt welding operation. Due to the different types, specifications and sizes of the internal piping systems of the ship, there is a high precision requirement for the design and layout of the iron outfitting pipes, but the accuracy of the existing operation methods is low, resulting in the accuracy of the on-site assembly and connection of the iron outfitting pipes. The dislocation phenomenon has led to a large numbe...

Claims

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Application Information

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IPC IPC(8): B63B73/40
CPCB63B73/40
Inventor 常志军刘畅钟毅
Owner JIANGNAN SHIPYARD GRP CO LTD
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