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Flow measurement device for airborne microbe sampler

A technology of flow measurement device and sampler, which is applied in measurement device, test/calibration device, liquid/fluid solid measurement, etc., to achieve the effect of simple and compact structure, wide flow measurement range and improved accuracy

Pending Publication Date: 2017-06-09
苏州市计量测试研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The measurement range of the instrument is 90L / min~110L / min, and the accuracy is ±1%. It can only calibrate the 100L / min airborne bacteria sampler. However, on the market in my country, there are mainly 28.3L / min and 50L / min airborne bacteria samplers. , 100L / min 3 models, for the other two models, the import flow calibrator can do nothing

Method used

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  • Flow measurement device for airborne microbe sampler
  • Flow measurement device for airborne microbe sampler
  • Flow measurement device for airborne microbe sampler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] figure 1 It is a schematic front view of a flow measuring device for a planktonic bacteria sampler provided by an embodiment of the present invention, figure 2 It is a cross-sectional view of the flow measuring device used for the planktonic bacteria sampler provided by the embodiment of the invention. see figure 1 with figure 2 , the flow measurement device includes a flow guide mechanism and a detection mechanism, wherein the flow guide mechanism includes a guide body, an air equalizing network 5, a first pressure-taking port 2, a second pressure-taking port 3 and an orifice plate 6, and the guide body has a flow guide channel, the orifice plate 6 is arranged in the diversion channel, and the air equalizing net 5 is arranged at the entrance of the diversion channel. The air equalizing net 5 can make the air flow rate entering the diversion channel uniform, which is beneficial to the air pressure at the entrance of the diversion channel. stability, the outlet of t...

Embodiment 2

[0050] The flow measurement device provided in this embodiment can be used in conjunction with the planktonic sampler, and includes a diversion mechanism and a detection mechanism, wherein the diversion mechanism includes a diversion body, an air equalizing network 5, a first pressure-taking port 2, a second The pressure taking port 3 and the orifice plate 6, the diversion body has a diversion channel, the orifice plate 6 is arranged in the diversion channel, and the air equalization net 5 is arranged at the entrance of the diversion channel, and the air equalization net 5 can make the flow diversion The air flow rate of the channel is uniform, which is conducive to the stability of the air pressure at the entrance of the diversion channel. The outlet of the diversion channel is used to connect the collection port of the planktonic bacteria sampler. The first pressure-taking port 2 and the second pressure-taking port 3 are set at The diversion body is connected with the diversi...

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Abstract

The invention relates to a measurement device for measuring the physical quantity, in particular to a flow measurement device for an airborne microbe sampler. The device comprises a diversion mechanism and a detection mechanism; the diversion mechanism comprises a diversion body with a diversion channel, a pore plate arranged in the diversion channel, a first pressure tapping, a second pressure tapping and an air uniform flow net installed at a diversion passage inlet, wherein the first pressure tapping and the second pressure tapping are formed in the diversion body; the detection mechanism comprises an air pressure difference sensor and a flow conversion unit, the air pressure difference sensor is used for detecting an air pressure difference between the first pressure tapping and the second pressure tapping, and the flow conversion unit is used for processing an output signal of the air pressure difference sensor to obtain air flow. The device is simple in structure and low in cost and has the advantages of being high in measurement precision and good in stability, and the device is suitable for self-calibration of an enterprise using the airborne microbe sampler, calibration of a third-party detection institution and factory debugging of an airborne microbe sampler production unit.

Description

technical field [0001] The invention relates to a measuring device for measuring physical quantities, in particular to a flow measuring device for calibrating the flow of a planktonic bacteria sampler. Background technique [0002] The planktonic sampler is an instrument used to measure planktonic microorganisms in the air. The instrument sucks air through the porous sampling head or slit through the suction device, and impacts it on the petri dish, and the microorganisms in the air are "captured" on the agar medium. Then the culture medium is cultivated in the microbial incubator, and the microbial content in the air can be obtained by counting. The instrument can be widely used in pharmaceutical industry, food industry, beverage tap water, drug inspection institute, sanitation and epidemic prevention, hospital, public places and other related industries and departments. [0003] As a mature instrument, the planktonic sampler has been widely used in enterprises and labora...

Claims

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Application Information

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IPC IPC(8): G01F25/00
CPCG01F25/15
Inventor 吴振一朱兰厉龙
Owner 苏州市计量测试研究所