Stick for measuring circumferential distance of flange plate

Abstract

The invention provides a stick for measuring the circumferential distance of a flange plate, which comprises a stick body, wherein the two ends of the stick body are respectively provided with measuring scales, the measuring scale valve of one end is larger than that of the other end, and the top of the end with the smaller measuring scale valve is provided with a lug boss. The stick can be suitable for use under various environment conditions such as air medium or underwater, and the like; has simple structure, small volume, convenient carrying, flexible operation, convenience and simpleness; exactly measures the circumferential distance of the flange plate and greatly improves the success rate of the butt joint of the flange plate; and saves time and labor, is safe and reliable, and effectively improves the work efficiency and the accuracy.

Description

technical field [0001] The invention relates to a tool for measuring the circumferential spacing of flanges, in particular to a tool for measuring the circumferential spacing of flanges which is easy to operate and accurate in measurement, and is suitable for measuring the circumferential spacing of flanges under various environmental conditions, especially underwater. measuring stick. Background technique [0002] The connection of pipes is mostly done through the butt joint of flanges. The circumferential spacing of the flanges is often uneven after the butt joint, which will inevitably make the sealing ring between the flanges unable to play a sealing role, resulting in leakage at the flange connection. Therefore, after measuring the circumferential spacing of the flange, it is necessary to continue to apply force to the position with a large spacing to make the circumferential spacing of the flange uniform, so that the sealing ring and the flange can fit tightly , can ...

AI Technical Summary

Problems solved by technology

[0003] The main methods of measuring the circumferential distance of the flanges in the prior art include the rough manual measurement method, that is, measuring the circumferential distance between the two flanges roughly by hand, so the error is relatively large, resulting in the joints of the flanges Leakage occurs frequently, and rework must be done again, which wastes manpower and material resources and affects the construction period

There is also a caliper measurement method, which is guaranteed in the air medium, but under water, it will be affected by tassels, tides, visibility and water temperature. The use of calipers is limited, which directly affects the accuracy of the readings, and the operation is not easy. Flexible, so it is not suitable for measuring the circumferential distance of the underwater flange, because the caliper reading can still be carried out when the underwater visibility is good, and the underwater reading of the caliper is very difficult when the underwater visibility is poor; in addition, In winter, when the water temperature is low, the hands of divers are quickly frozen and numb, and it is difficult to place the calipers accurately. There is a deviation in the reading angle, and the measurement accuracy cannot be guaranteed.

Furthermore, it increases the diver's underwater operation time, and the safety is not good.

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