An experimental device and method for measuring pressure change wind resistance
A technology of experimental device and pressure-changing device, which is applied in measurement devices, earthwork drilling, fluid velocity measurement, etc.
Active Publication Date: 2020-08-18
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology
After decades of development in my country's coal mining industry, in addition to the great changes in its well type, scale, roadway layout, support structure, etc., the mine as a whole is also developing in a higher and deeper direction. The existing roadway friction resistance The coefficient table has not kept pace with the times and is updated in time, so it cannot fully adapt to the current actual situation
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[0048] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between components in a specific posture (as shown in the accompanying drawings). If the relative positional relationship, movement situation, etc. change, the directional indication will change accordingly.
[0049] Such as Figure 1 to Figure 6 As shown, the present invention provides an experimental device for measuring pressure-variable air resistance, including a host computer 1, a ventilation device 2, and a pressure-transforming device 3. The ventilation device 2 includes an annular closed duct 21 and a fan arranged inside the annular closed duct 21 22. A plurality of sets of gas parameter measuring devices 45 are evenly arranged along the annular closed pipe 21, and the pressure transformation device 3 is used to adjust the air pressure in the annular closed pipe 21 and used to te...
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The invention belongs to the technical field of mine ventilation, and discloses an experimental device and method for measuring pressure variable windage resistance. The device includes a host computer, a ventilation device and a pressure changing device. There are multiple groups of gas parameter measuring devices evenly arranged in the annular closed pipeline. The pressure changing device includes a pressure source, a constant pressure storage tank, and a pressure regulating storage tank. The pressure source, constant pressure storage tank and pressure regulating storage tank are connected in sequence. A pressure regulating solenoid valve is set between the pressure regulating storage tanks, a manual vent valve is set between the pressure regulating storage tank and the annular closed pipeline, and a pressure sensor, a gas parameter measuring device, a pressure sensor, and a pressure regulating electromagnetic valve are installed in the pressure regulating storage tank. The valve, pressure relief valve, and fan are connected with the upper electromechanical; the present invention studies the change of atmospheric pressure on the coefficient of frictional resistance from practical factors, directly determines the coefficient of frictional resistance, and then can determine the frictional windage under high and low pressure environments.
Description
Technical field [0001] The invention belongs to the technical field of mine ventilation, and in particular relates to an experimental device and method for measuring pressure-variable wind resistance. Background technique [0002] Since the beginning of the 21st century, as all kinds of electrified and mechanized equipment enter the mining industry, the scale of underground resource mining continues to expand. The easy-to-mine shallow underground resources in the southeast and the open-pit resources in the northeast can no longer meet the huge demand for resources by my country's heavy industry enterprises. Therefore, it has become an urgent need to increase the exploitation of mineral resources in high-altitude areas in the west and deep underground areas in the south. Mine ventilation is the most important technical means to ensure the safe mining of mines. However, with the expansion of mining scale, the mining trend is developing in a higher and deeper direction. This has brou...
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IPC IPC(8): G01M9/06G01P5/00E21F1/02E21F1/00
CPCE21F1/006E21F1/02G01M9/06G01P5/00
Inventor 刘剑赵龙王东张明旭王瑛曲宝刘庆海
Owner LIAONING TECHNICAL UNIVERSITY