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Void structure instrument

A pore structure and pipeline technology, applied in scientific instruments, suspension and porous material analysis, measurement devices, etc., can solve the problems of unstable mercury column height, affecting the measurement accuracy of the maximum pore of rock samples, etc., to reduce the loss of mercury, Effect of reducing shock phenomenon and improving accuracy

Inactive Publication Date: 2006-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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Problems solved by technology

In addition, the usual pore structure instrument needs to fill the core chamber with mercury after vacuuming. This instrument adopts the method of directly inhaling mercury from the mercury storage bottle. Due to the change of atmospheric pressure and the gradual decrease of the mercury liquid level in the mercury storage bottle, It is easy to cause the mercury column height in the upper part of the rock sample in the core chamber to be unstable, which affects the measurement accuracy of the largest pore of the rock sample

Method used

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Embodiment Construction

[0016] figure 1 It is the flow chart of the pore structure instrument: when the core chamber 21 is evacuated, first open the mercury bottle vacuum solenoid valve 9, vacuumize the vacuum mercury storage bottle 16, and then open the mercury suction solenoid valve 12 to suck the mercury in the mercury storage bottle 11 In the vacuum mercury storage bottle 16. Due to the effect of vacuuming, the mercury sucked into the vacuum mercury storage bottle 16 is degassed and purified. When the mercury reaches a certain height in the vacuum mercury storage bottle 16 and touches the probe 23, the probe 23 sends a signal to the control instrument , so that it sends an instruction to make the mercury filling solenoid valve 15 and the three-way ball valve 14 open, and the mercury after degassing and purification is slowly poured into the rock core chamber 21 and the capacitance volume meter 25. At this time, the vacuum mercury storage bottle 16 and the rock core chamber 21 constitute a U-shap...

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Abstract

In pore structure instrument, volume resolution radio is below 1u1 and fluctuation range of static pressure at top end of rock core chamber is less than 10 mm Hg, inside of each component in system is firstly vacuumized by vacuum pump, then through open and close of each valve in sequence all components are filled with mercury with vacuum mercury storage bottle being placed in the same level height with rock core chamber; a glass thin tube with dead sealed bottom is internally sleeved in outer layer of metal tube of capacity volumeter as metal tube bottom is connected to piping of rock core chamber.

Description

technical field [0001] The present invention relates to the technical field of testing or analyzing materials, especially testing the pore volume of porous materials, by means of determining their chemical or physical properties. Background technique [0002] At present, the 9220 and 9420 pore structure analyzers produced by Micromeritics in the United States are the most common pore structure analyzers in the world today. The working pressure of this instrument can reach 400MPa, and it uses the principle of capacitance to measure the change of mercury in the volume dilatometer. The instrument has high measurement accuracy and high working pressure. However, the negative pressure test and positive pressure test of the instrument must be divided into two steps, so there is no continuity, and the data during negative pressure mercury removal cannot be measured. Mercury removal is not complete, and Volumetric dilatometers consume a lot of mercury. [0003] Domestic patent No....

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 陈伟均郑冰陈红宇范明金聚畅
Owner CHINA PETROLEUM & CHEM CORP