A thermal flow meter
A thermal flow meter, flow technology, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, measuring devices, etc., can solve the problems of deviation of measurement results, low measurement accuracy, and measurement results are easily interfered by external factors, etc. , to achieve the effect of easy comparison, high measurement accuracy and excellent heat insulation effect
Active Publication Date: 2018-01-30
ANHUI AICS SCI & TECH GROUP
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Problems solved by technology
However, when the existing thermal flowmeter is measuring, when the flow rate of the fluid medium is too high, the temperature sensor located in the fluid medium has low measurement accuracy in the high-speed moving fluid medium, and the measurement result is easily disturbed by external factors. lead to deviations in the final measurement results
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[0028] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.
[0029] like figure 1 Shown is a schematic structural diagram of the present invention, the present invention is a thermal flowmeter, including a main pipe 1, a branch pipe 2 and a flow insertion pipe 3; the number of branch pipes 2 is three, and are arranged in parallel with each other; the main pipe 1 is respectively connected to the branch pipes 2 the inflow and outflow ends. The main pipe 1 is equipped with a pressure gauge 11; the branch pipe 2 is equipped with a solenoid valve 12; the solenoid valve 12 is connected with the pressure gauge 11; the left and right ends of the main pipe 1 are also connected with a pipe sleeve 13; the pipe sleeve 13 is equipped w...
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The invention provides a thermal flow meter which comprises a main pipe, at least two branch pipes and a flow inserting pipe. The branch pipes are arranged in parallel. The main pipe is connected with the flow-in end and the flow-out end of each branch pipe respectively. The flow inserting pipe is inserted in the pipe walls of the main pipe and the branch pipes and comprises an inserting pipe body, a measuring end and a reference end. The inserting pipe body is a hollow pipe and is perpendicularly inserted in the pipe walls of the main pipe and the branch pipes. The measuring end is fixed to the tail end of the inserting pipe body and comprises a heat transfer rod, a heat insulation cover and a piezoresistance bridge. During division measurement, fluid is measured before division and after division, comparison is convenient, and measurement reliability is ensured; the thermal flow meter is high in measurement precision and can not be easily interfered with by external factors.
Description
technical field [0001] The invention belongs to the field of flow measuring equipment, and in particular relates to a thermal flow meter. Background technique [0002] A thermal flowmeter is a tool that uses the principle of heat diffusion to measure fluid flow. There are two temperature sensors, one of which is heated above the ambient temperature and the other is placed in the fluid medium. As the flow rate of the fluid medium increases, the heat taken away by the medium increases, and the temperature difference between the two temperature sensors changes with the flow rate of the medium. According to the proportional relationship between the temperature difference and the flow rate of the fluid medium, the fluid flow rate can be obtained. However, when the existing thermal flowmeter is measuring, when the flow rate of the fluid medium is too high, the temperature sensor located in the fluid medium has low measurement accuracy in the high-speed moving fluid medium, and th...
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IPC IPC(8): G01F1/684
CPCG01F1/684
Inventor 瞿庆广骆垠旭王汉元王炳华李成林
Owner ANHUI AICS SCI & TECH GROUP