Calibration device project of cement fineness nega

2022-08-09
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The calibration device project of cement fineness negative pressure sieve analyzer of Xingtai Institute of metrology has been evaluated

cement fineness negative pressure sieve analyzer is an instrument that enables the cement in the test sieve to reach screening within the specified screening time through the constant air flow generated by the negative pressure source. It is mainly used for the fineness inspection of ordinary cement, silicate cement and other powdery materials. Recently, Hebei Provincial Bureau of quality and technical supervision appraised the science and technology project of Hebei Provincial Bureau of quality supervision "calibration device of cement fineness negative pressure sieve analyzer" undertaken by Xingtai measurement and testing institute

the calibration device project of cement fineness negative pressure sieve analyzer of Xingtai Institute of Metrology was appraised

experts agreed that the calibration device is easy to carry, convenient for on-site calibration, and solves the problem of dynamic and static calibration of cement fineness negative pressure sieve analyzer system. The overall technical level is currently in the leading position in China. At the same time, experts also put forward good suggestions for improving the time calibration scheme of the device

cement fineness negative pressure sieve analyzer is an instrument that enables the cement in the test sieve to reach screening within the specified screening time through the constant air flow generated by the negative pressure source. System negative pressure is a main technical parameter of cement fineness negative pressure sieve analyzer. Its accuracy directly affects the sieve residue of the instrument, and then affects the judgment of cement fineness. The instrument is applied to water in cement production enterprises and construction industry in order to provide more perfect products and services for regional customers. It is also widely used in powder fineness testing in other industries

the calibration device of cement fineness negative pressure sieve analyzer of the Institute is a standard instrument for calibrating cement fineness negative pressure sieve analyzer. The device is composed of negative pressure source and supporting equipment. When measuring, the pressure is given by the negative pressure source, and the negative pressure meter of the calibration device and the calibrated instrument respectively receives the pressure through their respective and displays the displayed value, so as to realize the calibration of the cement fineness negative pressure sieve analyzer. The negative pressure calibration of the cement fineness negative pressure sieve analyzer in the static state can be carried out independently, and the negative pressure calibration of the cement fineness negative pressure sieve analyzer in the dynamic state can also be carried out by stopping loading at least five times before loading to the destruction of the test piece

the calibration device is embedded in the lifting platform, and the adjustable height of the lifting platform is 20cm to 90cm; Equipped with special tee, 2 crow's feet outward, freely adjustable, including floor glue, rubber on electronic components, and key components on rubber products; Such as replacement of brake pipes, brake cups, brake pads, seals, etc., to realize the connection with different tested equipment

the overall design scheme of the device was put forward in April 2014, and the experiment was completed and finalized in December 2016. During this period, it took more than two years. During this period, the researchers of the Institute continued to modify and improve, and finally finalized the design, which cost a lot of effort. The successful passing of the appraisal of the expert committee marks the further improvement of the scientific research ability and technical transformation level of the Institute. In the future, the calibration of the cement fineness negative pressure sieve analyzer can be carried out, which is of great significance to improve the accuracy of the cement fineness measurement results and strictly control the product quality

According to the working principle and technical characteristics of cement fineness negative pressure sieve analyzer, Xingtai Institute of Metrology and testing has determined and verified the calibration parameters and technical indicators with reference to relevant national standards, and studied and formulated the calibration method of cement fineness negative pressure sieve analyzer, which provides a basis for cement quality control and instrument calibration

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