Inner ruler laying device for vertical metal tank verification and using method

Abstract

The invention provides an inner ruler laying device for vertical metal tank verification and a using method, and belongs to the technical field of metal tank measuring equipment. The inner ruler laying device comprises two mounting boxes, a first driving mechanism, a cylindrical box, a pressing mechanism and a leveling mechanism. The two mounting boxes are fixedly connected together in parallel through two connecting rods. A gap is formed between the two mounting boxes. The first driving mechanism can drive the two mounting boxes to crawl along the wall of a tank. The cylindrical box is fixedly arranged in the gap. A third rotating shaft is rotationally arranged in the cylindrical box. A steel tape is arranged on the third rotating shaft. An opening is formed in the bottom of the cylindrical box. The free end of the steel tape penetrates through the opening and extends out of the cylindrical box. When the two mounting boxes crawl on the wall of the tank, the pressing mechanism can enable the steel tape close to the cylindrical box to be tightly attached to the wall of the tank to lengthen the steel tape; and when the two mounting boxes crawl along the wall of the tank, the levelingmechanism can enable the cylindrical box to be always located in the same horizontal height. According to the inner ruler laying device for the vertical metal tank verification and the using method,the measuring precision of the inner ruler laying of a vertical metal tank can be improved, and time and labor are saved.

Description

technical field [0001] The invention belongs to the technical field of measuring equipment for metal cans, and relates to an internal measuring device for vertical metal cans and a use method. Background technique [0002] Vertical metal tank is an important measuring instrument for oil trade transfer, and its measurement accuracy is directly related to the economic interests of both parties in international trade and the national measurement reputation. In recent years, with the country's strategic petroleum reserve planning and the continuous enhancement of domestic large-scale petroleum refining and chemical capabilities, domestic vertical metal tanks have shown a trend of increasing year by year. [0003] There are many methods for verifying the capacity of vertical metal tanks. For example, some methods based on the principle of photoelectric distance measurement. According to the requirements of API, ISO7507, GB / T13235, JJG168 and other international and domestic stand...

AI Technical Summary

Problems solved by technology

The method of laying the ruler inside means that the tester first draws the track of the base circle at 3 / 4 of the base circle of the storage tank, then leans the ruler tape against the tank wall, fixes the ruler tape with a magnetic stand or other methods, and then uses The steel ruler presses the ruler tape in turn, so that the ruler tape is tightly attached to the tank wall, and a complete circle is pasted section by section by manual pressure ruler, so as to obtain the inner circumference of the circle, which is time-consuming and laborious; If the ruler is used for manual measurement, the accuracy of the measurement may be affected due to the cooperation of personnel and its own state. When the two measured values ​​are greater than the allowable value, it is necessary to re-lay the ruler

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