Method for measuring fan delivery by static pressure difference
A technology of fan air volume and static pressure difference, which is applied in the direction of measuring fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effects, etc. high air flow rate and reduced accuracy of air volume measurement, etc., to achieve the effects of convenient installation, stable static pressure value, and easy operation
Inactive Publication Date: 2012-09-19
河北伟积电气有限公司 +1
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Problems solved by technology
All of the above methods have limitations and poor versatility
[0007] In the fan online monitoring system or detection, the static pressure value obtained by the above method is often not stable enough
Moreover, the above three methods have high requirements on the conditions of the detection site; sometimes it is difficult to install the measuring instruments and meters according to the specifications and standards, so that the accuracy of the air volume measurement is reduced, and it cannot meet the requirements of the safety technical performance testing of the main ventilators in coal mines; at the same time, Their use is limited and their versatility is poor
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[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] The following will refer to Figure 1 to Figure 3 , each step in the specific implementation of a method for measuring the air volume of a fan by static pressure difference of the present invention is described in detail.
[0035] A method for measuring the air volume of a fan by static pressure difference. In the first step, two pressure measurement points, the first pressure measurement point S1 and the second pressure measurement point S2, are respectively taken at the entrance 2 of the fan behind the roadway 1 and the damper 9;
[0036] In the second step, me...
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The invention relates to a method for measuring a fan delivery by static pressure difference. The method comprises the following steps of: (1) respectively getting a first pressure measurement point S1 and a second pressure measurement point S2 at a laneway and a fan inlet; (2) respectively measuring static pressure values of the first pressure measurement point S1 and the pressure measurement point S2; and (3) calculating a delivery according to a set formula. The method has good generality, can be applied to delivery measurement of all fan detection or on-line monitoring and has the advantages of high measurement precision, convenience in mounting and easy operation. According to the method, a low-pass digital filter method is used for processing the static pressure values, and stable static pressure values can be obtained.
Description
technical field [0001] The invention relates to the technical field of mine detection and measurement, in particular to a method for measuring the air volume of a fan by static pressure difference. Background technique [0002] Mine ventilator is a fixed equipment that transports fresh air underground, removes harmful gases from the mine, maintains normal production conditions, and ensures safe operation and personnel health. Its operating status is directly related to personal safety and whether production can run normally. , plays an important role in ensuring the normal and safe production of mines. [0003] At present, conventional fan air volume measurement methods include: air meter measurement method, pressure equalizing tube measurement method and static pressure difference measurement method. [0004] The wind meter measurement method is to divide a certain section with stable wind flow in the air duct into several small areas according to the equal area method, an...
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Inventor 李长刚王桂梅胡志军焦山林
Owner 河北伟积电气有限公司