Drawing type high temperature component deformation sensing device
A technology of sensing devices and components, applied in the direction of measuring devices, mechanical devices, mechanical solid deformation measurement, etc., can solve problems such as installation difficulties, high-temperature strain gauge influence, and difficulty in meeting long-term online monitoring, etc., to achieve convenient and stable installation, High linearity and resolution, the effect of high engineering application value
Inactive Publication Date: 2010-12-08
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology
There are many sensing devices for conventional deformation measurement, such as self-clip extensometer 91220430.3, a quartz glass high-temperature displacement sensor 200410100478.8, etc., but these devices are generally only suitable for short-term monitoring and laboratory applications. It is difficult to install when monitoring the circumferential deformation of cylindrical components
High-temperature strain gauges (200520022877.7) can meet the above monitoring, but high-temperature strain gauges are greatly affected by the working environment, and it is difficult to meet the requirements of long-term online monitoring
Method used
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Embodiment
[0046] By simulating the technological conditions of the main steam pipeline of a certain power plant, the radial deformation, axial deformation, and two directions of radial deformation and axial deformation of an elbow were tested by using the three extension-type high-temperature component deformation sensing device prototypes mentioned above. The main parameters of the tested main steam pipeline are: the material is 10CrMo910, the pressure is 10MPa, the temperature is 540°C, the specification is Φ273mm×28mm, and the thickness of the insulation layer is 200mm. The length of the stabilizer bars and measuring probes of the three prototypes used in the test is 220 mm.
[0047] When installing, first open the insulation layer of the pipeline and fix it on the pipeline. Connect the signal output wire of the strain gauge test terminal, the data acquisition module and the computer, adjust the zero adjustment piece to an appropriate position, clear the initial displacement in the d...
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Abstract
The invention relates to an elongated high-temperature member deformation sensing device. The structure of the device is as follows: a stabilizer rod is arranged inside a stabilizer rod jack on a support which is axially parallel to an element to be measured; a measuring probe is arranged inside a probe jack on a support which is axially perpendicular to the element to be measured; probe jacks ontwo fixed blocks are aligned to the middle of a probe groove; measuring probes are inserted into the probe jacks through the probe groove; an elastic element provided with a strain gauge is arranged between rectangles of the two fixed blocks in a supporting frame; a testing terminal is connected with the strain gauge; and two high-temperature resistant ropes, four springs and four chains form a tensioning mechanism which binds the element to be measured and the supporting frame. The elongated high-temperature member deformation sensing device can perform online monitoring on deformation of various metallic members and various nonmetallic members at a high temperature, and has high measurement precision, linearity and resolution.
Description
technical field [0001] The invention discloses an extension-type high-temperature component deformation sensing device, which belongs to the technical field of structure and material deformation measurement. The sensing device can monitor the deformation of high-temperature metal and non-metal elements on-line. Background technique [0002] High-temperature and high-pressure pipelines are widely used in thermal power plants, petrochemical plants, nuclear power plants and other factories. Their safety and reliability are an important guarantee for the long-term operation of the entire production system. For components that operate under high temperature and high pressure for a long time, creep is the main factor causing their failure. The creep measurement of the pipeline, and then the life assessment and safety supervision of the pipeline can not only avoid the major hidden dangers of safe operation, but also do Arrange maintenance and prepare spare parts in a planned way, ...
Claims
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IPC IPC(8): G01B5/30G01N19/00
Inventor 贾九红涂善东轩福贞王正东李岩
Owner EAST CHINA UNIV OF SCI & TECH