A draft test method

Abstract

The invention discloses a draught reading device used for light weight measuring. The draught reading device comprises a glass measuring pipe, a magnetic box, a first stainless steel pipe, a plastic hose, a handle screw and a second stainless steel pipe, scales are arranged on a pipe wall of the glass measuring pipe, a pointer annularly sleeves on the periphery of the zero-position scale, the first stainless steel pipe penetrates the undersurface of the magnetic box from the top surface of the magnetic box through a hole groove, the handle screw enables the first stainless steel pipe and the magnetic box to be fixed through the hole groove, the lower end of the first stainless steel pipe is connected with the upper end of the glass measuring pipe through a first adapter, the lower end of the glass measuring pipe is connected with the upper end of the plastic hose through a second adapter, the lower end of the plastic hose is connected with the upper end of the second stainless steel pipe, and water incoming holes are uniformly distributed on a pipe wall of the second stainless steel pipe. The draught reading device is simple and easy to manufacture, simple and convenient to operate and capable of avoiding uncontrollable factors like winds and waves well, thereby enabling measured values to be more accurate.

Description

technical field [0001] The invention relates to the technical field of draft measurement of ship wharves, in particular to a draft reading device and a testing method thereof for measuring the weight of an empty ship. Background technique [0002] Lightship weight measurement is a very important test in the process of ship design and construction. Whether the lightship weight measurement is accurate or not is directly related to the load capacity index of the ship and whether the ship can be successfully delivered to the shipowner. The draft reading is the most important link in the whole test process, because each centimeter of draft directly corresponds to the weight deviation of tens of tons or even more than 100 tons of current large cargo ships. [0003] At present, the conventional method of draft reading in the lightship weight measurement test is to obtain the approximate average value by visual inspection on the tugboat. However, in the actual process, relevant per...

AI Technical Summary

Problems solved by technology

However, in the actual process, relevant personnel of the shipyard are often subject to the influence of wind and waves on the river, and it is very difficult to read the draft visually. Ship weight measurement test could not be successfully submitted

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