In-tank temperature field measurement system of large-scale pVTt metering tank
A measuring system and measuring tank technology, applied in the direction of measuring device, liquid/fluid solid measurement, test/calibration device, etc., can solve the temperature imbalance of the container, the temperature sensor can not truly reflect the temperature in the tank, and reduce the gas flow standard of the pVTt method equipment detection efficiency and other problems, to achieve the effect of improving detection efficiency, temperature stability and uniformity
Active Publication Date: 2020-12-11
ZHENJIANG MEASUREMENT VERIFICATION TEST CENT
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Problems solved by technology
Before testing the pVTt method gas flow standard device, use a vacuum pump to evacuate the standard container into a vacuum. This process is equivalent to the external work of the standard container, the temperature in the container decreases, and the temperature in the container is unbalanced (the temperature at the exhaust pipe is low), insert the The temperature sensor in the standard container cannot truly reflect the temperature in the tank. Usually, the standard container should be stabilized in a constant temperature environment for several hours after vacuuming, and the temperature in the standard container can be accurately measured after the temperature in the standard container is balanced.
In the same way, it takes several hours of waiting time after the standard container is inflated, which greatly reduces the detection efficiency of the pVTt method gas flow standard device
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[0086] The present invention enumerates two kinds of implementation modes as follows:
[0087] One, such as Figure 6 , 8 ~10, each half cover 201 has two connection ports 201a as liquid inlets and two connection ports 201a as liquid outlets; flange heads 301 are installed on the four connection ports 201a as liquid inlets, and Collect through the first pipeline 902, and finally connect to the bottom of the water tank 901; flange heads 301 are also installed on the four connection ports 201a as liquid outlets, and collect through the second pipeline 903, and finally connect to the water tank 901 side. Plugging heads 302 are installed on the remaining connecting ports 201a.
[0088] Two, such as Figure 7 , 11 , each half sleeve 201 has a connection port 201a as a liquid inlet and a connection port 201a as a liquid outlet; flange heads 301 are installed on the two connection ports 201a as liquid inlets, and pass through the first pipe The channels 902 are collected and fi...
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The invention discloses an in-tank temperature field measurement system for a large-scale pVTt metering tank, and the system comprises a standard container group, an air inlet unit, an air outlet unit, and a detection unit. The standard container group comprises a standard container and a clamping sleeve which detachably sleeves the periphery of the standard container, and an interlayer space is formed between the standard container group and the clamping sleeve; the standard container comprises a tank body, an air inlet end and an air outlet end, wherein the air inlet end and the air outlet end are symmetrically arranged at the two ends of the tank body. The clamping sleeve comprises a pair of half bodies which are symmetrically arranged, and the two half bodies can be arranged at the twoends of the tank body in a sleeving mode correspondingly and are in butt joint with each other for sealing; a plurality of mounting parts which are through inside and outside are arranged on the halfbodies, and joint assemblies of different specifications are detachably connected to the mounting parts. The air inlet unit comprises an air inlet pipeline connected with the air inlet end, and a detected nozzle is arranged on the air inlet pipeline; the air outlet unit comprises an air outlet pipeline connected with the air outlet end, and a vacuum pump is arranged on the air outlet pipeline. According to the invention, the detection efficiency of the mass flow of the sonic nozzle is improved.
Description
technical field [0001] The invention relates to the technical field of flow standards, in particular to a temperature field measurement system in a large pVTt metering tank. Background technique [0002] The pVTt method gas flow standard device is a standard device for indirect measurement of gas mass flow. The principle is: the device enters or discharges gas into or out of a standard container with a volume of V within a certain time interval t, and calculates the gas mass during the detection process according to the changes in the absolute pressure p and thermodynamic temperature T of the gas in the standard container before and after the intake flow. Before testing the pVTt method gas flow standard device, use a vacuum pump to evacuate the standard container into a vacuum. This process is equivalent to the external work of the standard container, the temperature in the container decreases, and the temperature in the container is unbalanced (the temperature at the exhau...
Claims
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Login to View More IPC IPC(8): G01F25/00
CPCG01F25/14G01F25/10
Inventor 周轶石建荣肖晖赵作广孙彩虹董芳徐焰栋
Owner ZHENJIANG MEASUREMENT VERIFICATION TEST CENT