A butterfly-shaped indicating washer for checking the torque of marine flange fasteners

Abstract

The invention discloses a butterfly indicating washer for checking the moment of a marine flange fastener, which comprises a butterfly washer and an indicator ring arranged on the butterfly washer, and the butterfly washer includes a washer main body and a butterfly gland And the indicating structure, the center of the gasket body is provided with a fixing hole, the butterfly gland extends in the circumferential direction from the lower part of the gasket body, the indicating structure extends in the circumferential direction from the end of the butterfly gland, and the indicating structure is set There is an annular groove for clamping the indicator ring. The invention can quickly and intuitively detect the fastening torque of the flange fasteners by setting the indicator ring on the butterfly washer, which improves the efficiency of on-site construction, saves the later inspection operation process, and improves the inspection of the pipeline system. efficiency.

Description

technical field [0001] The invention relates to the technical field of shipbuilding, in particular to a butterfly-shaped indicating washer for checking the torque of a marine flange fastener. Background technique [0002] The pipelines in the marine pipeline system are usually connected and installed with flanges. According to the corresponding design requirements of the pipeline system pressure, temperature, medium, etc., install bolts and nuts on the flanges and tighten them (according to the diameter of the marine flanges) , the thread diameter used is M27~M56mm), in order to prevent leakage at the flange connection, the tightening torque of the bolts and nuts needs to be inspected, usually the tightening torque of the fasteners should reach 70% to 100% of the rated torque %N.M. [0003] The traditional method usually uses a torque indicating wrench to check the tightening torque of the fasteners to indicate that each pair of threaded fasteners has reached the same and r...

AI Technical Summary

Problems solved by technology

[0006] 1. The construction space is limited, and it is impossible to inspect each pair of flanges one by one after the piping system is connected;

[0007] 2. Under different construction stages and working conditions, different torque indication methods for threaded fasteners (torque indication wrench, secondary tightening of bolts and nuts, etc.) are required. The technical requirements for operators are relatively high, and a unified and intuitive method is lacking. The torque state judgment method;

[0008] 3. The installation of pipeline flanges is carried out by different construction personnel, and there is a lack of effective and intuitive inspection methods during the installation of fasteners, resulting in the failure of threaded fasteners to meet the torque requirements after installation

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