CN205157380U - Particle detection device - Google Patents
Particle detection device Download PDFInfo
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- CN205157380U CN205157380U CN201520827466.9U CN201520827466U CN205157380U CN 205157380 U CN205157380 U CN 205157380U CN 201520827466 U CN201520827466 U CN 201520827466U CN 205157380 U CN205157380 U CN 205157380U
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Abstract
The utility model provides a particle detection device, including the subassembly that admits air, detect the chamber, subassembly and air exhaust device give vent to anger, the subassembly of giving vent to anger communicates air exhaust device respectively and detects the chamber, the detection chamber is connected to the subassembly that admits air, subassembly and give vent to anger between the subassembly interval and set up and form the photosensitive area admits air, the subassembly that admits air includes interior intake duct and external admission way, during saying, the external admission sets up the filter, the external admission is said and is encircleed interior intake duct setting, the subassembly of giving vent to anger includes interior gas off -take and outer gas off -take, outer gas off -take surrounds interior gas off -take setting, the gas outlet of interior intake duct is just right the air inlet of interior gas off -take, the gas outlet that the external admission was said is just right the air inlet of outer gas off -take. The utility model provides a pair of particle detection device aims at solving the problem that has that life is short, the cost is higher relatively, maintainability is not good enough among the current air particle detection device etc.
Description
Technical field
The utility model relates to a kind of suspended particulate substance pick-up unit.
Background technology
Suspended particulate substance content detection in air is the important indicator of air pollution quality and control, can cause certain injury, cause potential long-term hazards risk with the air pollution that PM2.5 high concentration fine particle pollutes for principal mode to health.In prior art based on the air-borne dust concentration detector of light scattering method because of the advantage in real-time, sensitive, low cost, occupy the consumption market of the overwhelming majority at present.But, the in use particle accumulation year in year out in cavity of this air particle detector cavity, thus make astigmatism collector unit and sensing cell and illumination optical system be subject to severe contamination, cause the degradation of accuracy of detection.Existing product is without cavity anti-pollution measure, and most of inlet end can not well be separated bulky grain thing, and large particulate matter easily drives straight in.Test chamber like this is easily polluted, thus impact detects life-span and accuracy of detection, and maintainability and the continuous working period under high pollution environment exist larger defect.Therefore existing airborne suspended particulate detector cavity more or less also exists that serviceable life is short, cost is relatively high, the maintainable problem such as not good enough.
Utility model content
For having in existing airborne suspended particulate pick-up unit that serviceable life is short, cost is relatively high, maintainable not good enough etc. problem, a kind of suspended particulate substance pick-up unit is provided, this pick-up unit can be shunted detection gas, bulky grain thing is separated with small particle, bulky grain thing is avoided to enter in test chamber, prevent the diffusion of sampling gas column in test chamber inside simultaneously, thus improve the serviceable life of pick-up unit and the accuracy of detection, be convenient to safeguard.
It is as follows that the utility model solves the problems of the technologies described above adopted technical scheme:
1, a kind of suspended particulate substance pick-up unit is provided, comprise air intake assembly, test chamber, go out pneumatic module and air extractor, described go out pneumatic module be communicated with air extractor and test chamber respectively, described test chamber is provided with optical detection device, and described optical detection device is arranged perpendicular to the airflow direction of photosensitive area;
Described air intake assembly connects test chamber, described air intake assembly and go out interval between pneumatic module arrange formed photosensitive area, described air intake assembly comprises interior air intake duct and external admission road, in described external admission road, filtrator is set, described external admission road is arranged around interior air intake duct, described go out pneumatic module comprise interior gas off-take and outer gas off-take, described outer gas off-take is arranged around interior gas off-take, the gas outlet of described interior air intake duct is just to the air intake opening of described interior gas off-take, and the gas outlet in described external admission road is just to the air intake opening of described outer gas off-take.
Further, interior gas off-take is cylindrical air flue, and the cross section of outer gas off-take is annular, and outer gas off-take is arranged around the periphery of interior gas off-take.
Further, interior air intake duct is cylindrical air flue, and the cross section in external admission road is annular, and external admission road is arranged around the periphery of interior air intake duct.
Further, one end, described external admission road is communicated with air, other end access test chamber, described interior air intake duct one end access test chamber, and the other end is communicated with external admission road by sluice way, and in described sluice way and external admission road, airflow direction is arranged in obtuse angle.
Further, in described sluice way and external admission road, airflow direction is more than or equal to 120 ° in obtuse angle.
Further, the end face that described interior air intake duct and described external admission road are positioned at test chamber inside is in the same plane, and the end face that described interior gas off-take and described outer gas off-take are positioned at test chamber inside is in the same plane.
Further, described interior air intake duct is consistent with the internal diameter of interior gas off-take, and described external admission road is consistent with the internal diameter of outer gas off-take.
Further, described external admission road comprises filtration air flue and protection air flue, and described filtration air flue is connected by described filtrator with protection air flue, and described filtration air flue is communicated with interior air intake duct with air respectively, and described protection air flue is communicated with test chamber.
Further, the sectional area of described filtration air flue is greater than the sectional area of protection air flue.
Further, described air extractor is axial flow blower, centrifugal blower or positive displacement blower fan.
The shunting that suspended particulate substance pick-up unit is carried out interior exterior air drain by the utility model is arranged, clean air conservation layer is formed in the outside of sampling gas column by external admission road and outer gas off-take, air conservation layer can by the constraint of sampling gas column therein, avoid the diffusion of sampling gas column in test chamber, thus other spaces and device in the suspended particulate substance in sampling gas column and test chamber are isolated, prevent from suspended particle loss from producing the optical element of test chamber to pollute, keep the accuracy of this pick-up unit, improve maintainable, simultaneously, air conservation layer is with can ensureing sampling gas column stable and uniform from the inside gas off-take of interior inlet duct flow, improve the scattering uniformity coefficient of photosensitive area, prevent air turbulence on the impact of testing result, reliably continuously under high dust concentration state can detect dust granules content.
Accompanying drawing explanation
Fig. 1 is the diagrammatic cross-section of a kind of suspended particulate substance pick-up unit that the utility model provides;
Fig. 2 is A place enlarged diagram in Fig. 1 of providing of the utility model;
Reference numeral in Figure of description is as follows:
1, air intake assembly; 11, external admission road; 111, air flue is filtered; 112, filtrator; 113, air flue is protected; 12, interior air intake duct; 13, sluice way; 2, test chamber; 21, optical detection device; 22, photosensitive area; 3, pneumatic module is gone out; 31, outer gas off-take; 32, interior gas off-take; 4, air extractor.
Embodiment
The technical matters solved to make the utility model, technical scheme and beneficial effect are clearly understood, below in conjunction with drawings and Examples, are further elaborated to the utility model.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In description of the present utility model, it will be appreciated that, term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Shown in Figure 1, the utility model provides a kind of suspended particulate substance pick-up unit, comprise air intake assembly 1, test chamber 2, go out pneumatic module 3 and air extractor 4, described go out pneumatic module 3 be communicated with air extractor 4 and test chamber 2 respectively, described air intake assembly 1 connects test chamber 2, described air intake assembly 1 and go out interval between pneumatic module 3 arrange formed photosensitive area 22, described air intake assembly 1 comprises interior air intake duct 12 and external admission road 11, in described external admission road 11, filtrator 112 is set, described external admission road 11 is arranged around interior air intake duct 12, interior air intake duct 12 and external admission road 11 are connected into test chamber 2, interior air intake duct 12 is cylindrical air flue, external admission road 11 for cross section be annular air flue, periphery around interior air intake duct 12 is arranged, described go out pneumatic module 3 comprise interior gas off-take 32 and outer gas off-take 31, described outer gas off-take 31 is arranged around interior gas off-take 32, one end access air extractor of described interior gas off-take 32 and described outer gas off-take 31, the other end access test chamber 2 of described interior gas off-take 32 and described outer gas off-take 31, interior gas off-take 32 is cylindrical air flue, outer gas off-take 31 for cross section be annular air flue, periphery around interior gas off-take 32 is arranged, described interior air intake duct 12 and described interior gas off-take 32 are positioned on same axis, the gas outlet of described interior air intake duct 12 is just to the air intake opening of described interior gas off-take 32, described external admission road 11 and described outer gas off-take 31 are positioned on same axis, the gas outlet in described external admission road 11 is just to the air intake opening of described outer gas off-take 31.Being photosensitive area 22 between interior air intake duct 12 and interior gas off-take 32, is photosensitive area between external admission road 11 and outer gas off-take 31.
Test chamber 2 is provided with optical detection device 21, test chamber 2 inner sealing, get rid of the interference of outside veiling glare, the power that air extractor 4 provides gas to flow, gas along air intake assembly 1, photosensitive area 22, go out pneumatic module 3, air extractor 4 direction flowing, when air-flow is through photosensitive area 22, optical detection device 21 forms light trapping by the directive photosensitive area 22 that emits beam, scattering is there is in the molecule in air-flow under the irradiation of light, obtained the scattering strength in test chamber by photoelectric receiving tube (not shown), thus calculate the suspended particulate matter concentration in gas to be measured.
Shown in Figure 2, for a kind of preferred implementation of the present utility model, one end, described external admission road 11 is communicated with air, other end access test chamber 2, described interior air intake duct 12 one end access test chamber 2, the other end is communicated with external admission road 12 by sluice way 13, described sluice way 13 is arranged in obtuse angle with airflow direction in external admission road 12, under the effect of air extractor 4, external admission road 11 and interior air intake duct 12 are simultaneously toward test chamber 2 direction air inlet, gas to be measured is flowed into by the air intake opening in external admission road 11, flow along external admission road 11, by arranging the shunting that sluice way 13 realizes gas between interior air intake duct 12 and external admission road 11, part gas to be measured enters into interior air intake duct 12 by sluice way 13, bulky grain thing in gas to be measured has larger inertia, airintake direction along external admission road 11 flows, small particle in gas to be measured due to inertia less, sluice way 13 is entered into by the suction-operated of interior air intake duct 12, flow in test chamber 2 and detect, described sluice way 13 is arranged in obtuse angle with airflow direction in external admission road 11, can effectively prevent bulky grain thing from entering into test chamber 2, avoid the interference of bulky grain thing to testing result.
The workflow of the present embodiment is: gas to be measured is entered by external admission road 11, shunted by sluice way 13, bulky grain thing flows along gas approach axis, small particle flows in interior air intake duct 12 along sluice way 13, air-flow in interior air intake duct 12 carries small particle and flows in test chamber 2, interior gas off-take 32 is entered into through photosensitive area 22, sampling gas column is formed in photosensitive area 22, the detection of finely ground particles in gas is carried out by optical detection device 21 and photoelectric receiving tube, air-flow in external admission road 11 filters through filtrator 112, eliminating the gas after suspended particulate substance wherein flows in test chamber 2, and enter into outer gas off-take 31 through photosensitive area 22, air-flow in external admission road 11 forms pure air through filtering, because external admission road 11 is looped around interior air intake duct 12 outside, it is outside that outer gas off-take 31 is looped around interior gas off-take 32, so external admission road 11 and outer gas off-take 31 form air conservation layer in the outside of sampling gas column, air conservation layer can by the constraint of sampling gas column therein, avoid the diffusion of sampling gas column in test chamber 2, thus other spaces and device in the suspended particulate substance in sampling gas column and test chamber 2 are isolated, prevent from suspended particle loss from producing the optical element of test chamber 2 to pollute, keep the accuracy of this pick-up unit, improve maintainable, simultaneously, air conservation layer flows to interior gas off-take 32 from interior air intake duct 12 with can ensureing sampling gas column stable and uniform, improve the scattering uniformity coefficient of photosensitive area 22, prevent air turbulence on the impact of testing result, reliably continuously under high dust concentration state can detect dust granules content.
In the present embodiment, the gas flow rate of the air intake opening in described external admission road 11 is more than or equal to 0.3m/s, the gas flow rate of the present embodiment to air intake opening limits, its object is to enable the bulky grain thing in gas to be measured and small particle obtain enough impulse inertias, bulky grain thing need possess certain impulse inertia just can reach the object being separated size particles.The regulative mode of air intake opening gas flow rate is mainly: according to the extraction flow size of air extractor 4, the sectional area of adjustment air intake opening, thus regulates the gas flow rate of air intake opening.
In order to improve the efficiency that bulky grain thing is separated with small particle further, described sluice way 13 is set to be more than or equal to 120 ° with airflow direction in external admission road 11 in obtuse angle.
In the present embodiment; the air extractor 4 adopted is selected from axial flow blower, centrifugal blower or positive displacement blower fan; it should be noted that, the utility model does not specifically limit air extractor 4, and other realize air operated device and all should be included within protection domain of the present utility model.
In the present embodiment, described external admission road 11 comprises filtration air flue 111 and protection air flue 113, described filtration air flue 111 is connected by described filtrator 112 with protection air flue 113, described filtrator 112 is arranged around interior draft tube 12 periphery, described protection air flue 113 inside is the pure air after filter 112 filters, by protection air flue 113 pure air is transported in test chamber 2 and forms air conservation layer, described filtration air flue 111 is communicated with interior air intake duct 12 with air respectively, gas to be measured is first shunted through sluice way 13 and is filtered through filtrator 112, described protection air flue 113 is communicated with test chamber 22, described interior air intake duct 12 is positioned at protection air flue 113, the inside of filtrator 112 and filtration air flue 111.
In the present embodiment, in order to ensure the homogeneity of air current flow in photosensitive area 22, the end face that described interior air intake duct 12 and described external admission road 11 are positioned at test chamber 2 inside is in the same plane, the end face that described interior gas off-take 32 and described outer gas off-take 31 are positioned at test chamber 2 inside is in the same plane, the end face that interior air intake duct 12 and interior gas off-take 32 are positioned at test chamber 2 inside is parallel to each other, described interior air intake duct 12 is consistent with the internal diameter of interior gas off-take 32, described external admission road 11 is consistent with the internal diameter of outer gas off-take 31, gas to be measured in interior air intake duct 12 and the clean gas in external admission road 11 all can enter interior gas off-take 32 and outer gas off-take 31 along its flow direction respectively, avoid mixing between gas, keep the homogeneity of gas flowing.
The sectional area of described filtration air flue 111 is greater than the sectional area of protection air flue 113, pipeline specifically by being arranged through internal diameter size respectively at filtration air flue 111 and protection air flue 113 carries out socket and realizes, seal between pipeline, avoid gas leakage, form the internal diameter of the pipeline filtering air flue 111 and be greater than the internal diameter of the pipeline forming protection air flue 113, the object of this setting is to make the gas flow rate of air conservation layer be greater than the gas flow rate of sampling in gas column, thus obtain better protection and constraint effect, when the gas flow rate that test of many times draws when air conservation layer is more than or equal to 10% of the gas flow rate of sampling gas column, the protected effect of air conservation layer to sampling gas column is best.
In order to realize the detection to suspended particulate substance content in sampling gas column, test chamber 2 is provided with optical detection device 21, described optical detection device 21 is arranged perpendicular to the airflow direction of photosensitive area 22, optical detection device 21 forms light trapping toward photosensitive area 22 incident light line, sampling gas column carries out scattering to light, photoelectric receiving tube (not shown) and astigmatism collector unit (not shown) is also provided with in described test chamber 2, collect by the light of astigmatism collector unit to the scattering of sampling gas column and be pooled on sensing cell, sensing cell draws the concentration of suspended particulate substance in sampling gas column by the size of scattered beam.
The optical detection device 21 adopted in the present embodiment comprises Laser emission and light shaping assembly; the utility model does not limit the specific category of optical detection device, and the technical scheme adopting other lasing devices to carry out simple substitute all should be included within protection domain of the present utility model.
This suspended particulate substance pick-up unit is on the one hand at air intake opening place additional particulates thing separative element, and form clean air protective seam through filter screen and peripheral airway on the other hand, both structures organically combine, and improve detection efficiency.The beneficial effects of the utility model are being separated by interior air intake duct and external admission road, avoid bulky grain thing directly to enter inside cavity; Fetter suspended particulate substance in sampling gas column by the clean air protective seam formed, can not spread and be infected with cavity, thus realize reducing costs in long service live simultaneously, improve measuring accuracy.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a suspended particulate substance pick-up unit, it is characterized in that, comprise air intake assembly, test chamber, go out pneumatic module and air extractor, described go out pneumatic module be communicated with air extractor and test chamber respectively, described test chamber is provided with optical detection device, and described optical detection device is arranged perpendicular to the airflow direction of photosensitive area;
Described air intake assembly connects test chamber, described air intake assembly and go out interval between pneumatic module arrange formed photosensitive area, described air intake assembly comprises interior air intake duct and external admission road, in described external admission road, filtrator is set, described external admission road is arranged around interior air intake duct, described go out pneumatic module comprise interior gas off-take and outer gas off-take, described outer gas off-take is arranged around interior gas off-take, the gas outlet of described interior air intake duct is just to the air intake opening of described interior gas off-take, and the gas outlet in described external admission road is just to the air intake opening of described outer gas off-take.
2. a kind of suspended particulate substance pick-up unit according to claim 1, is characterized in that, interior gas off-take is cylindrical air flue, and the cross section of outer gas off-take is annular, and outer gas off-take is arranged around the periphery of interior gas off-take.
3. a kind of suspended particulate substance pick-up unit according to claim 1, is characterized in that, interior air intake duct is cylindrical air flue, and the cross section in external admission road is annular, and external admission road is arranged around the periphery of interior air intake duct.
4. a kind of suspended particulate substance pick-up unit according to claim 1, it is characterized in that, one end, described external admission road is communicated with air, other end access test chamber, described interior air intake duct one end access test chamber, the other end is communicated with external admission road by sluice way, and in described sluice way and external admission road, airflow direction is arranged in obtuse angle.
5. a kind of suspended particulate substance pick-up unit according to claim 4, is characterized in that, in described sluice way and external admission road, airflow direction is more than or equal to 120 ° in obtuse angle.
6. a kind of suspended particulate substance pick-up unit according to claim 1, it is characterized in that, the end face that described interior air intake duct and described external admission road are positioned at test chamber inside is in the same plane, and the end face that described interior gas off-take and described outer gas off-take are positioned at test chamber inside is in the same plane.
7. a kind of suspended particulate substance pick-up unit according to claim 1, is characterized in that, described interior air intake duct is consistent with the internal diameter of interior gas off-take, and described external admission road is consistent with the internal diameter of outer gas off-take.
8. a kind of suspended particulate substance pick-up unit according to claim 1; it is characterized in that; described external admission road comprises filtration air flue and protection air flue; described filtration air flue is connected by described filtrator with protection air flue; described filtration air flue is communicated with interior air intake duct with air respectively, and described protection air flue is communicated with test chamber.
9. a kind of suspended particulate substance pick-up unit according to claim 8, is characterized in that, the sectional area of described filtration air flue is greater than the sectional area of protection air flue.
10. a kind of suspended particulate substance pick-up unit according to claim 1, is characterized in that, described air extractor is axial flow blower, centrifugal blower or positive displacement blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827466.9U CN205157380U (en) | 2015-10-22 | 2015-10-22 | Particle detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520827466.9U CN205157380U (en) | 2015-10-22 | 2015-10-22 | Particle detection device |
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| Publication Number | Publication Date |
|---|---|
| CN205157380U true CN205157380U (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520827466.9U Active CN205157380U (en) | 2015-10-22 | 2015-10-22 | Particle detection device |
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| CN (1) | CN205157380U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN111735746A (en) * | 2020-06-10 | 2020-10-02 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| TWI827109B (en) * | 2021-07-20 | 2023-12-21 | 日商日立產機系統股份有限公司 | Microparticle measuring device |
-
2015
- 2015-10-22 CN CN201520827466.9U patent/CN205157380U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307677A (en) * | 2019-11-22 | 2020-06-19 | 北京雪迪龙科技股份有限公司 | Laser front scattering particulate matter monitoring device |
| CN111735746A (en) * | 2020-06-10 | 2020-10-02 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| CN111735746B (en) * | 2020-06-10 | 2022-10-04 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| TWI827109B (en) * | 2021-07-20 | 2023-12-21 | 日商日立產機系統股份有限公司 | Microparticle measuring device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20200106 Address after: 518119 1 Yanan Road, Kwai Chung street, Dapeng New District, Shenzhen, Guangdong Patentee after: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address before: 516083 Guangdong city of Huizhou province Dayawan xiangshuihe Patentee before: HUIZHOU BYD INDUSTRIAL Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: BYD Semiconductor Co.,Ltd. |