Assembling structure for turbine steam parameter measurement probe

Abstract

The invention discloses an assembling structure for a turbine steam parameter measurement probe, which comprises an inner cylinder, an outer cylinder, a probe, a casing pipe bracket, a protective casing pipe and a valve, wherein one end of the probe is connected with a measurement system; the other end of the probe passes through the inner cylinder and the outer cylinder to measure the steam parameter in a turbine; the casing pipe bracket is connected to the outer cylinder; the upper end of the casing pipe bracket is connected with the valve; the protective casing pipe is used for guiding and protecting the probe; the protective casing pipe is provided with one section of corrugated pipe, is arranged in the casing pipe bracket and extends into the inner cylinder; the bottom end of the protective casing pipe is in tight coupling with the inner cylinder; and the top end of the protective casing pipe is in tight coupling with the valve. According to the assembling structure for the turbine steam parameter measurement probe, the probe is guided and protected by the protective casing pipe provided with the corrugated pipe; two ends of the protective casing pipe respectively form reliable tight coupling with the valve and the inner cylinder of the turbine, and steam leakage is avoided; the safety of the steam parameter measurement operation and the accuracy of a measurement result are effectively guaranteed; and the unit operation safety is guaranteed.

Description

technical field [0001] The invention relates to steam parameter measurement in a steam turbine, in particular to an assembly structure of a probe for steam parameter measurement of a steam turbine. Background technique [0002] When performing a performance test on a steam turbine unit, in order to know the steam parameters of a certain stage in the flow part of the steam turbine and the various performance indicators of this stage, it is necessary to use the probes of the measurement system for the pre-stage, inter-stage and post-stage of the stage. The steam parameters are measured. [0003] At present, the probe of the measurement system is directly mounted on the steam turbine in a rigid and sealed assembly structure through a simple protective sleeve. Since the working fluid to be measured by the probe is high-temperature, high-pressure steam, and there is an inner cylinder and an outer cylinder between the measured working fluid and the outside world, there is an expa...

AI Technical Summary

Problems solved by technology

During the test, the high-temperature and high-pressure steam causes thermal expansion of the rigid sealing assembly structure of the probe, and the sealing assembly structure is difficult to withstand the thermal stress generated by the expansion difference between the inner cylinder and the outer cylinder, so that the protective sleeve of the probe is in contact with the steam turbine. Displacement of the sealed connection part of the seal, forming a gap, resulting in damage to the seal assembly structure, resulting in steam leakage

This not only directly affects the accuracy of the measurement results, but more seriously, when the steam leaks between the inner cylinder and the outer cylinder, it will cause high-pressure steam to leak to the low-pressure side, resulting in a decrease in the economy of the unit and even endangering the safety of the unit operation; when the steam leaks to the outside world, it will endanger the personal safety of the test personnel and the safe operation of the unit

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