Device and method for monitoring internal manufacturing defects of inner cylinder, outer cylinder and valve housing

Abstract

The invention provides a device for monitoring interior manufacturing defects of an inner cylinder, an outer cylinder and a valve casing. The device comprises an ultrasonic fault detector, a database server, a computation server and a user side browser, wherein the ultrasonic fault detector is used for fault detection of the interior of the inner cylinder, the outer cylinder and the valve casing, the database server is used for storing fault detection data, the computation server is used for computing the crack propagation life of the interior manufacturing defects of the inner cylinder, the outer cylinder and the valve casing so as to evaluate and monitor the interior manufacturing defects of the inner cylinder, the outer cylinder and the valve casing, and the user side browser is used for outputting evaluation and monitoring results. The invention further provides a method for monitoring interior manufacturing defects of an inner cylinder, an outer cylinder and a valve casing. Online computation and monitoring of the crack propagation life of the interior manufacturing defects of the inner cylinder, the outer cylinder and the valve casing of a steam turbine and a gas turbine are achieved, and the technical effect of quantitative evaluation and monitoring of the interior manufacturing defects of the inner cylinder, the outer cylinder and the valve casing of the steam turbine and the gas turbine is realized during manufacturing and machining of the inner cylinder, the outer cylinder and the valve casing.

Description

technical field [0001] The invention relates to a monitoring device and method for internal manufacturing defects of an inner cylinder, an outer cylinder and a valve housing based on crack extension life, and belongs to the technical field of steam turbines and gas turbines. Background technique [0002] At present, during the casting, welding and processing of the inner cylinder, outer cylinder and valve housing of steam turbines and gas turbines, internal manufacturing defects of the inner cylinder, outer cylinder and valve housing may occur. The traditional method requires that the internal manufacturing defects of the inner cylinder, outer cylinder and valve housing should not exceed 2mm. If the internal manufacturing defects of the inner cylinder, outer cylinder and valve casing found by flaw detection are greater than 2mm, the inner cylinder or outer cylinder or valve casing should be scrapped. The cost of the inner cylinder, outer cylinder and valve housing of steam ...

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Problems solved by technology

[0004] The existing technology does not consider the influence of the main stress generated by the inner cylinder, outer cylinder and valve casing of the steam turbine and gas turbine during the start-up process on the crack growth life of the internal manufacturing defects of the inner cylinder, outer cylinder and valve casing, so it cannot be judged Whether the inner cylinder, outer cylinder and valve casing of the steam turbine and gas turbine with internal manufacturing defects can be safely used to the start-stop life of 10,000 times

In the manufacturing process of the inner cylinder, outer cylinder and valve housing of steam turbine and gas turbine, after flaw detection finds that the inner cylinder, outer cylinder and valve housing have internal manufacturing defects or cracks, evaluate the inner cylinder, outer cylinder and valve housing of steam turbine and gas turbine Whether the start-stop life can reach 10,000 times, there is no suitable method available

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