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Filter membrane automatic replacement device, method, and membrane replacement mechanism

A technology of automatic replacement and filter membrane, applied in measuring devices, sampling devices, instruments, etc., it can solve the problems of different time interval settings, inaccurate test data, and increase the workload of staff, so as to improve the measurement accuracy, improve the accuracy, Avoid wasteful effects

Active Publication Date: 2020-10-09
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But above-mentioned technology has increased the workload of staff member greatly
Moreover, due to the different standards for judging the degree of contamination among different workers, the time interval for replacement will also be set differently, which may lead to inaccurate detection data

Method used

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  • Filter membrane automatic replacement device, method, and membrane replacement mechanism
  • Filter membrane automatic replacement device, method, and membrane replacement mechanism
  • Filter membrane automatic replacement device, method, and membrane replacement mechanism

Examples

Experimental program
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Effect test

no. 1 example

[0042] [Functional Structure of Automatic Membrane Changer]

[0043] First, the filter membrane of the present invention will be described. The filter membrane in the present invention refers to the filter membrane used to filter the gas to be measured when detecting the gas. For example, the gas to be detected is the atmosphere, and what is to be detected is NO in the atmosphere 3content, the filter membrane will filter the aerosols, small solid particles, etc. in the atmosphere. After being used for a period of time, the filter membrane is contaminated, and the filter membrane automatic replacement device of the present invention can automatically replace the contaminated filter membrane.

[0044] Refer below figure 1 Describe the functional structure diagram of the filter membrane automatic replacement device according to the first embodiment of the present invention. The filter membrane automatic replacement device includes a detection unit 1 , a membrane replacement un...

no. 2 example

[0102] In the first embodiment, the upper cylinder 21 is lifted vertically, the lower cylinder 26 is fixed, and the upper cylinder 21 drives the filter membrane clamp 25 and the filter membrane 29 held by the filter membrane clamp to move, so that the membrane changing equipment can carry out filter membrane replacement.

[0103] However, the components in this embodiment have the same structure as those in the first embodiment, and will not be repeated here. The difference is that, in this embodiment, the relative motion relationship of the upper and lower cylinders is reversed, that is, the upper cylinder 21 is fixed, while the lower cylinder 26 is moved, and the filter clip 25 is arranged on the lower cylinder 26, and the lower cylinder 26 is moved At the same time, the filter membrane clamp 25 is driven to move together, and then the membrane changing equipment is used to replace the filter membrane.

[0104] Specifically, the method for automatically replacing the filter...

no. 3 example

[0107] In the first embodiment, the time to replace the filter membrane is determined by measuring the reflected light intensity of the filter membrane.

[0108] In this embodiment, however, the timing for replacing the filter membrane is determined by measuring the transmitted light intensity of the filter membrane.

[0109] Specifically, each component of the filter membrane automatic replacement device in this embodiment has the same structure as that of the filter membrane automatic replacement device in the first embodiment, and will not be repeated here. The difference is that, in this embodiment, the light source 11 and the photodetector 12 are located on both sides of the filter film, and the photodetector 12 detects the transmitted light after the light emitted from the light source 11 passes through the filter film 29, and according to the transmitted light Intensity to determine whether to replace the filter membrane.

[0110] Refer below Figure 8 The structure o...

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Abstract

The invention provides an automatic filtering membrane changing device applied to gas composition detection equipment. The device comprises a detection unit used for detecting the pollution degree ofa filtering membrane of the gas composition detection equipment as a detection result; and a membrane changing unit used for changing the filtering membrane in response to the condition that the detection result of the detection unit meets a predetermined condition.

Description

technical field [0001] The invention relates to an automatic replacement device for a filter membrane, in particular to an automatic replacement device for a filter membrane used in gas component detection equipment, a method for automatically replacing a filter membrane and a membrane replacement mechanism. Background technique [0002] In recent years, due to the emphasis on the gas quality in a specific environment, it is necessary to measure the gas composition in the environment, for example, to measure the concentration of a specific gas in the workplace, and to measure air samples when studying air pollution. measurements, etc. [0003] Taking the latter scenario above as an example, air samples need to be taken when monitoring air pollution. When collecting atmospheric samples, it is often necessary to use a filter membrane to remove particulate matter such as dust. In this case, the filter membrane needs to be replaced in a timely manner, usually at a predetermine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22G01N1/34G01N33/00
Inventor 左澎朱彤
Owner PEKING UNIV