High temperature permeability automatic measuring instrument

Instructions for using the high-temperature permeability automatic measuring instrument

1、 Overview
The HKY-3 automatic permeability analyzer is a rock core physical property analysis instrument that can provide reliable rock core permeability analysis basis for scientific research units in industries such as geology and coal mining. It can accurately measure the air permeability of rock cores ranging from 0.01 to 8000 × 10-3 μ m2.
This instrument has the advantages of stable performance, automatic data acquisition and processing, easy operation, and fast measurement speed.
Main technical parameters:
1. a. Measurement range: 0.01~8000 × 10-3 μ m2;
b. Measurement pressure: 0.1-0.6MPa;
c. Sealing pressure: 50MPa;
2. Analyze the core size: φ 25 × 25-80mm;
3. Sensor range: 1000Kpa;
4. Flow meter range: 10mL/min, 500mL/min, 3000mL/min;
5. Power supply voltage: AC 220V+10% 50Hz;
6. Measurement error: Low permeability ≤ 10%
Medium to high permeability ≤ 5%
7. Working environment: temperature of 20 ± 5%, relative humidity below 85%.
2、 Basic principles
The HKY-3 permeability automatic measuring instrument is designed based on Darcy's law. Under a certain pressure, air flows through the core. Due to the different permeability of the core, the flow rate and pressure passing through the core are also different. The pressure sensor, flow meter, A/D processor, and microcomputer system collect the pressure and flow values, and automatically print the permeability values after processing by the calculation program.
3、 Instrument structure and performance
The HK-5 automatic permeability tester consists of a testing instrument and a microcomputer. Its measurement range is 0.01-8000 × 10-3 μ m2.
The functions of each system of the instrument are as follows:
1. Automatic gas supply system: Gas at a certain pressure is output from gas cylinders and undergoes purification and drying treatment.
2. Pressure measurement system: The gas passes through the pressure regulating valve to output the required measurement pressure, and this value is used as the test pressure at the front end of the rock core. It is detected by a pressure sensor, directly reflected on the digital display table, and automatically collected.
3. The flow rate of gas passing through the core is measured by a mass flow meter, and its flow value is displayed on the flow display instrument.
4. Core holder: composed of rock chambers, plugs, pressure caps, rubber cylinders, and other parts. And adjust the screw according to the length of the core, so that the core is tightly plugged and sealed with ring pressure. After testing, release the ring pressure, and then release the plunger by adjusting the screw to remove the core.
5. Ring pressure gauge: Use it to indicate the pressure value applied to the outside of the rubber cylinder.
6. Whole machine control system: composed of electrical control unit and microcomputer.
7. Data processing system: The computer automatically collects pressure, flow rate, and other data, and combines them with other parameters for data processing software to calculate the permeability of the rock core.

Notes:
⑴. The two ends of the rock sample must be perpendicular to the axis of the rock sample, and the two end faces should be parallel to each other. When the end face of the rock sample is irregular, it may cause the rubber cylinder to wrinkle or scratch.
⑵. When the core holder does not have a layout device, it is not allowed to apply ring pressure, otherwise the rubber cylinder will be damaged.
⑶. When the core diameter is 1-1.5mm smaller than the specified value, placing it in the clamp will not damage the rubber cylinder; If it is smaller, appropriate measures should be taken to handle it so as not to damage the rubber cylinder.