CN202145178U - Laser dust particle counter and gas buffering device used by the same - Google Patents
Laser dust particle counter and gas buffering device used by the same Download PDFInfo
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- CN202145178U CN202145178U CN201120107663U CN201120107663U CN202145178U CN 202145178 U CN202145178 U CN 202145178U CN 201120107663 U CN201120107663 U CN 201120107663U CN 201120107663 U CN201120107663 U CN 201120107663U CN 202145178 U CN202145178 U CN 202145178U
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Abstract
The utility model relates to a gas buffering device for a laser dust particle counter, comprising a gas chamber having a gas inlet communicated with a high-pressure gas supply device and a gas outlet communicated with a sampling device, a pressure adjusting valve arranged between the gas inlet and the high-pressure gas supply device, and a differential pressure gauge for measuring the differential pressure between the pressure within the gas chamber and the atmospheric pressure. Such a structure arrangement, the gas buffering device provided in the utility model is capable of providing a buffer process for sampling high-pressure gas, and also capable of adjusting the pressure within the gas chamber through the differential pressure gauge, the pressure adjusting valve and the like, so that the laser dust particle counter obtains stable sampling flow rate; therefore, the laser dust particle counter comprising the gas buffering device is capable of effectively measuring the distribution of dust particles contained in the high-pressure gas to be tested.
Description
Technical field
The utility model relates to a kind of laser dust particle counter and uses gas buffer, and the laser dust particle counter that contains this gas buffer
Background technology
laser dust particle counter is used for measuring dust particle size and the number in the clean environment unit volume air, and it is widely used in departments such as electronics, optics, chemistry, food, cosmetics, medical and health, biological products, Aero-Space.
The ultimate principle of
laser dust particle counter is that the exploring laser light of optical sensor is received and the generation pulse signal by light activated element after the dust particle scattering; This pulse signal is exported and is amplified; Pass through digital signal processing; And compare with the standard particle signal, again comparing result is come out with different parametric representations.Scattering can take place in airborne particulate under the irradiation of light, this phenomenon is light scattering.Light scattering is relevant to the factors such as absorption characteristic of light with particle size, optical wavelength, particulate refractive index and particulate.But with regard to scattered light intensity and particle size, a basic law is arranged, be exactly the particulate scattered intensity increases with the surface area of particulate.Just can know the size of particulate by inference as long as measure scattered intensity like this.In fact; The scattered light intensity that each particle produces very a little less than; Be a very little light pulse, need be converted into the bigger electric pulse of signal amplitude to light pulse through the amplification of photoelectric commutator; And then the further amplification and the examination of process electronic circuit, thereby accomplish counting work to a large amount of electric pulses.At this moment, electric pulse quantity is corresponding to the number of particulate, and the amplitude of electric pulse is corresponding to the size of particulate.Laser dust particle counter just is based on that this principles forms.
existing laser dust particle counter is made up of sampling apparatus, light source, measurement chamber, photodetector and Circuits System etc. usually.Wherein, sampling apparatus comprises air pump and filtrator etc., and it is used for gathering gaseous sample to be measured and produces sampling flow (sampling flow is generally between 2.83L/min～28.3L/min); Light source is used for producing laser; Measuring the chamber is the space of carrying out particulate observation, and the gaseous sample of being gathered will pass from measuring the chamber; Photodetector is to be used for scattered energy is converted into the electrooptical device of electric signal; Circuits System is used for then that electric impulse signal with various different amplitudes amplifies, examination and counting etc., and Circuits System also comprises circuit such as power supply, control, demonstration, calculating and printing in addition.
Existing laser dust particle counter in use; Can only measure atmosphere gas; Gases at high pressure are because pressure is too high; Cause sampling apparatus uncontrollable sampling flow when sampling, thereby counter also can't be added up the dust-laden situation (size, number and the size distribution situation etc. that comprise dust particle) in the gases at high pressure effectively
Summary of the invention
the utility model technical matters to be solved is the deficiency that overcomes prior art; Provide a kind of laser dust particle counter to use gas buffer; It can make laser dust particle counter can obtain sampling flow stably for gases at high pressure provide a buffering course in the process that laser dust particle counter is sampled to gases at high pressure.
the utility model also will provide a kind of laser dust particle counter that contains the above-mentioned gas snubber assembly, and it can measure the dust-laden state in the gases at high pressure effectively.
For solving above technical matters, the utility model is taked following technical scheme:
A kind of laser dust particle counter is used gas buffer, comprising:
Air cavity, it comprises the air intake opening that is used for being connected with the gases at high pressure feeding mechanism, be used for the gas outlet that is connected with the sampling apparatus of laser dust particle counter;
Pressure-regulating valve, it is arranged between air intake opening and the gases at high pressure feeding mechanism, is used to regulate the admission pressure of gases at high pressure feeding mechanism when the air cavity air feed;
differential pressure indicator, its have the interior measuring port that communicates with air cavity and with the external pelivimetry mouth of atmosphere, be used to measure pressure and the pressure reduction between the atmospheric pressure in the air cavity.
further, said gas buffer also comprises and is arranged on the exhaust outlet that is connected on the air cavity, with outside atmosphere.Through offering exhaust outlet and can assisting the registration that keeps differential pressure indicator stable from the exhaust outlet exhaust in due course, also promptly guarantee the stable gas pressure in the air cavity.
a kind of laser dust particle counter; Comprise the sampling apparatus that is used for gathering gases at high pressure to be measured, being connected with described sampling apparatus is used to detect measurement chamber, light source, photodetector and the Circuits System of gases at high pressure dust-laden state to be measured, said gases at high pressure to be measured are supplied with by the gases at high pressure feeding mechanism; According to the utility model; Said laser dust particle counter also comprises the gas buffer that an end is connected with said sampling apparatus, the other end is connected with gases at high pressure to be measured; Said gas buffer comprises air cavity, and it comprises the air intake opening that is used for being connected with the gases at high pressure feeding mechanism, be used for the gas outlet that is connected with the sampling apparatus of laser dust particle counter; Pressure-regulating valve, it is arranged between air intake opening and the gases at high pressure feeding mechanism, is used to regulate the admission pressure of gases at high pressure feeding mechanism when the air cavity air feed; Differential pressure indicator, its have the interior measuring port that communicates with air cavity and with the external pelivimetry mouth of atmosphere, be used to measure pressure and the pressure reduction between the atmospheric pressure in the air cavity.
further, said gas buffer also comprises and is arranged on the exhaust outlet that is connected on the air cavity, with outside atmosphere.
Because the enforcement of above technical scheme, the utility model compared with prior art has following advantage:
the utility model laser dust particle counter is used gas buffer; A buffering course can be provided for the sampling of gases at high pressure; And can regulate the air pressure in the air cavity through differential pressure indicator and pressure-regulating valve etc.; Make laser dust particle counter obtain sampling flow stably, and then make the laser dust particle counter that contains this gas buffer can record the dust particle distribution situation in the gases at high pressure to be measured effectively.
Description of drawings
Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further detailed explanation:
Fig. 1 is the perspective view of the utility model laser dust particle counter with gas buffer;
Fig. 2 is the perspective view (part perspective) of the utility model laser dust particle counter with another angle of gas buffer;
wherein: 1, air cavity; 10, air intake opening; 11, gas outlet; 12, exhaust outlet; 2, pressure-regulating valve; 3, differential pressure indicator; 30, interior measuring port; 31, external pelivimetry mouth.
Embodiment
are done further detailed explanation below in conjunction with concrete embodiment to the utility model, but are not limited to these embodiment.
Embodiment 1
are as depicted in figs. 1 and 2, comprise air cavity 1, pressure-regulating valve 2 and differential pressure indicator 3 according to the laser dust particle counter of present embodiment with gas buffer.Air cavity 1 has the air intake opening 10 that is used for being connected with the gases at high pressure feeding mechanism, be used for the gas outlet 11 that is connected with the sampling apparatus of laser dust particle counter; Pressure-regulating valve 2 promptly is arranged between air intake opening 10 and the gases at high pressure feeding mechanism, when gases at high pressure feeding mechanism during to air cavity 1 air feed, can regulate admission pressure through the knob of turn pressure-regulating valve 2; Differential pressure indicator 3 have the interior measuring port 30 that communicates with air cavity 1 and with the external pelivimetry mouth 31 of atmosphere, it can be used to measure pressure and the pressure reduction between the atmospheric pressure in the air cavity.
in addition; Also be provided with the exhaust outlet 12 that is connected with outside atmosphere on the air cavity 1; When hypertonia in the air cavity 1 or instability, can assist other parts to guarantee the stable of differential pressure indicator 3 registrations through exhaust outlet 12 outside exhausts, promptly guarantee the pressure stability in the air cavity 1.
Embodiment 2
present embodiment provides a kind of laser dust particle counter; Comprise the sampling apparatus that is used for gathering gases at high pressure to be measured, being connected with sampling apparatus is used to detect measurement chamber, light source, photodetector and the Circuits System etc. of gases at high pressure dust-laden state to be measured; In the present embodiment; This laser dust particle counter also has the gas buffer among the embodiment 1, and its gas outlet 11 is connected with sampling apparatus, and air intake opening 10 is connected with gases at high pressure to be measured; Wherein, gases at high pressure to be measured are supplied with by the gases at high pressure feeding mechanism.
The laser dust particle counter of
present embodiment can be used to detect the size distribution situation of dust particle in the gases at high pressure, carries out briefly bright in the face of the use of this instrument down.The detection step is following: connect gas circuit; Regulate gases at high pressure through pressure-regulating valve 2 and get into the admission pressure in the gas buffer air cavitys 1, the registration that keeps differential pressure indicator (be in the air cavity 1 pressure be higher than about external atmosphere pressure 100pa) about 100pa; Make the sampling apparatus work of laser dust particle counter, miscellaneous part is normally operation also, and sampling pump produces sampling flow; This moment, the registration of differential pressure indicator 3 can decrease, and through fine setting pressure-regulating valve 2 registration of differential pressure indicator 3 was remained on about 50pa, can open exhaust outlet 12 where necessary to guarantee the pressure stability in the air cavity 1.Sampling apparatus is after the gas buffer sampling; Gas to be measured is sent into the measurement chamber; Dust particle in the gas to be measured in measuring the chamber after light source irradiation generation light scattering; Photodetector can convert scattered energy into electric impulse signal, and further through amplification, examination and the counting of Circuits System, converts the readable signal that the staff can discern at last into and shows.Because air cavity 1 itself had other gases in it before logical gases at high pressure, so the data in first sampling period are insincere, should be since second sampling period counting.
are though after the pressure of gases at high pressure reduces; Absolute dust particle number in its unit volume can't be measured; But the size distribution situation of dust particle can not change with the change of pressure in the gases at high pressure, so the laser dust particle counter of present embodiment can obtain dust particle size distribution situation in the effective gases at high pressure.
More than the utility model has been done detailed description; Its purpose is to let the personage that is familiar with this art can understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of doing according to the spirit of the utility model change or modify, and all should be encompassed in the protection domain of the utility model
Claims (4)
1.
A kind of laser dust particle counter is used gas buffer, it is characterized in that: described gas buffer comprises:
Air cavity (1), it comprises the air intake opening (10) that is used for being connected with the gases at high pressure feeding mechanism, be used for the gas outlet (11) that is connected with the sampling apparatus of laser dust particle counter;
Pressure-regulating valve (2), it is arranged between air intake opening (10) and the gases at high pressure feeding mechanism, is used to regulate the admission pressure of gases at high pressure feeding mechanism when air cavity (1) air feed;
differential pressure indicator (3), its have the interior measuring port (30) that communicates with air cavity (1) and with the external pelivimetry mouth (31) of atmosphere, be used to measure pressure and the pressure reduction between the atmospheric pressure in the air cavity (1).
2.
laser dust particle counter according to claim 1 is used gas buffer, it is characterized in that: said gas buffer also comprises the exhaust outlet (12) that is arranged on the said air cavity (1), is connected with outside atmosphere.
3.
a kind of laser dust particle counter; Comprise the sampling apparatus that is used for gathering gases at high pressure to be measured, being connected with described sampling apparatus is used to detect measurement chamber, light source, photodetector and the Circuits System of gases at high pressure dust-laden state to be measured; Said gases at high pressure to be measured are supplied with by the gases at high pressure feeding mechanism; It is characterized in that: said laser dust particle counter also comprises the gas buffer that an end is connected with said sampling apparatus, the other end is connected with gases at high pressure to be measured; Said gas buffer comprises air cavity (1), and it comprises the air intake opening (10) that is used for being connected with the gases at high pressure feeding mechanism, be used for the gas outlet (11) that is connected with the sampling apparatus of laser dust particle counter; Pressure-regulating valve (2), it is arranged between air intake opening (10) and the gases at high pressure feeding mechanism, is used to regulate the admission pressure of gases at high pressure feeding mechanism when air cavity (1) air feed; Differential pressure indicator (3), its have the interior measuring port (30) that communicates with air cavity (1) and with the external pelivimetry mouth (31) of atmosphere, be used to measure pressure and the pressure reduction between the atmospheric pressure in the air cavity (1).
4.
Laser dust particle counter according to claim 3 is characterized in that: said gas buffer also comprises the exhaust outlet (12) that is arranged on the said air cavity (1), is connected with outside atmosphere
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120107663U CN202145178U (en) | 2011-04-13 | 2011-04-13 | Laser dust particle counter and gas buffering device used by the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120107663U CN202145178U (en) | 2011-04-13 | 2011-04-13 | Laser dust particle counter and gas buffering device used by the same |
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| Publication Number | Publication Date |
|---|---|
| CN202145178U true CN202145178U (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120107663U Expired - Fee Related CN202145178U (en) | 2011-04-13 | 2011-04-13 | Laser dust particle counter and gas buffering device used by the same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221520A (en) * | 2011-04-13 | 2011-10-19 | 苏州苏净仪器自控设备有限公司 | Laser dust particle calculator |
| CN104977232A (en) * | 2015-07-10 | 2015-10-14 | 苏州华达仪器设备有限公司 | Gas buffer apparatus of laser particle dust counter |
| CN107064432A (en) * | 2017-05-22 | 2017-08-18 | 苏州宏瑞净化科技有限公司 | Gases at high pressure diffuser |
| CN110398994A (en) * | 2019-08-14 | 2019-11-01 | 希尔思仪表（深圳）有限公司 | Gas particles counter decompressor and its decompression method |
-
2011
- 2011-04-13 CN CN201120107663U patent/CN202145178U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102221520A (en) * | 2011-04-13 | 2011-10-19 | 苏州苏净仪器自控设备有限公司 | Laser dust particle calculator |
| CN104977232A (en) * | 2015-07-10 | 2015-10-14 | 苏州华达仪器设备有限公司 | Gas buffer apparatus of laser particle dust counter |
| CN107064432A (en) * | 2017-05-22 | 2017-08-18 | 苏州宏瑞净化科技有限公司 | Gases at high pressure diffuser |
| CN110398994A (en) * | 2019-08-14 | 2019-11-01 | 希尔思仪表（深圳）有限公司 | Gas particles counter decompressor and its decompression method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SUZHOU SUJING INSTRUMENT AUTOMATIC CONTROL EQUIPME Effective date: 20121217 Owner name: JIANGSU SUJING GROUP CO. LTD. Free format text: FORMER OWNER: SUZHOU SUJING INSTRUMENT AUTOMATIC CONTROL EQUIPMENT CO., LTD. Effective date: 20121217 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121217 Address after: 215122 Suzhou Industrial Park, Jiangsu, the only new road, No. 2 Patentee after: Jiangsu Sujing Group Co., Ltd. Patentee after: Suzhou Sujing Group Automation Instrument Equipment Corporation Address before: 215122 Suzhou Industrial Park, Suzhou Province, the only new road, No. 2, Jiangsu Patentee before: Suzhou Sujing Group Automation Instrument Equipment Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20190413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |