Force measuring device suitable for extreme multi-factor coupling environment

Abstract

The invention discloses a force measuring device suitable for an extreme multi-factor coupling environment. The device avoids the mode of connecting a high-temperature and high-pressure sensor in series in a loading pull rod in a threaded connection manner and directly measuring the force of a test piece in a high-temperature and high-pressure environment in the prior art, so that the problem of measurement errors caused by looseness of the joint of the sensor after long-time use or especially in the process of fatigue testing is solved, and the problems of complex structure and high cost of the high-temperature and high-pressure sensor when the force sensor with the same precision and the high-temperature and high-pressure resistant function is compared with a standard force sensor under conventional conditions are solved. The force sensor which is integrally designed and processed with the loading pull rod and is suitable for the normal-temperature and normal-pressure air environment can directly measure the force of the test piece, is reliable in long-term use, simple in structure and easy to maintain, and can realize high-precision measurement, and the problem of inaccurate measurement data caused by lack of a sensor suitable for an extreme multi-factor coupling environment such as an ultrahigh-temperature ultrahigh-pressure corrosive water or steam environment function is solved.

Description

technical field [0001] The invention relates to a force measuring device suitable for extreme multi-factor coupling environments. Background technique [0002] In order to evaluate the service safety of metal materials working in an extreme multi-factor coupling environment such as ultra-high temperature, ultra-high pressure corrosive water or steam environment, the samples are placed in a closed container such as an autoclave in a high temperature and high pressure corrosive water or steam environment. For performance testing, however, there is currently no force sensor on the market that is suitable for directly measuring the force of a test piece under such conditions. [0003] The closest prior art is Chinese Invention Patent Application Publication Specification CN 111060392 A, which discloses a device that can directly measure tension and compression loads in a high-temperature and high-pressure container. They are respectively connected with the ends of the two disco...

AI Technical Summary

Problems solved by technology

[0002] In order to evaluate the service safety of metal materials working in an extreme multi-factor coupling environment such as ultra-high temperature, ultra-high pressure corrosive water or steam environment, the samples are placed in a closed container such as an autoclave in a high temperature and high pressure corrosive water or steam environment. Performance test, however, there is currently no force sensor suitable for directly measuring the force of the specimen under such conditions and environments on the market

[0003] The closest prior art is Chinese Invention Patent Application Publication Specification CN 111060392 A, which discloses a device that can directly measure tension and compression loads in a high-temperature and high-pressure container. They are respectively connected with the ends of the two disconnected tie rods in a threaded way, and the force sensor is directly placed in a high-temperature and high-pressure environment to measure the force of the specimen. In addition, the pressure balance mechanism described in this technology uses a bellows to connect the force sensor It is separated from the high-pressure vessel into two chambers, using the same pressure method of different media to eliminate the additional force acting on the test piece. Although this method avoids the influence of friction on the force measurement accuracy, it also brings problems: one It is the bellows pressure balance mechanism that also produces a certain amount of additional force during the test, resulting in measurement errors. Second, compared with the conventional standard force sensor, the high temperature and high pressure sensor with the same precision has a complex structure and high cost. The third is to use the method of disconnecting the tie rod and connecting the force sensor into it. After long-term use, especially for fatigue tests, the threaded connection is prone to looseness, which is not easy to detect, resulting in measurement errors. Fourth, there is no suitable for high temperature and high pressure sensor calibration or Relevant standards for calibration, which will affect the confidence of the sensor's measurement results

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