CN201425572Y - High-precision device for measuring dust concentration - Google Patents
High-precision device for measuring dust concentration Download PDFInfo
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- CN201425572Y CN201425572Y CN2009200915857U CN200920091585U CN201425572Y CN 201425572 Y CN201425572 Y CN 201425572Y CN 2009200915857 U CN2009200915857 U CN 2009200915857U CN 200920091585 U CN200920091585 U CN 200920091585U CN 201425572 Y CN201425572 Y CN 201425572Y
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Abstract
The utility model relates to a high-precision device for measuring dust concentration. The device comprises a dust measure channel, an optical unit and a referential cavity; a first dust sensor is arranged on the channel; a referential light source interface and a second light receiving pipe in opposite arrangement are communicated with the referential cavity; a second dust sensor is correspondingly communicated with the referential cavity; the dust measure channel adopts a straight-through channel; a light source measure interface and a first light receiving port in opposite arrangement are communicated with the dust measure channel; an extraction probe and an extraction fan are correspondingly arranged at two ends of the channel; and the optical unit comprises a general light source generator, which is connected with a measure light source interface and a referential light source interface through two optical fibers for equally dividing the general light beam. The device utilizes thesecond dust sensor to perform timing zero-point calibration and utilizes the comparison process of the system, so as to lead the measure value to be more accurate, and prevent the inaccurate measurement results caused by light source intensity emission error.
Description
Technical field
The utility model relates to a kind of powder concentration measurement device.
Background technology
Conventional online formula powder concentration measurement device mainly is that the mixed gas that adopts air extractor will have dust is extracted into the dust measurement passage, utilize optical transmitting set and dust sensor that the dust concentration in the dust measurement passage is measured then, again mixed gas is extracted out at last and gone.Its air extractor mainly contains two kinds at present, a kind of is to adopt the sampling aspiration pump to install the mode of filter membrane additional, another kind is the mode that adopts extraction fan, the former could operate as normal because of installing filter membrane additional, but after filter membrane works long hours, and dust will bulk deposition, influence normal pumping airflow amount and reduce air-flow velocity, thereby the normal test of influence, so in use must regularly replace filter membrane, this is very inconvenience for the on-line measurement instrument; The latter adopts extraction fan dust directly can be discharged, thereby needn't install filter membrane additional, has overcome first kind of mode and has changed the awkward problem of filter membrane.
Which kind of air extractor no matter the powder concentration measurement device adopt, all exist and measure passage because of the limited problem of sample gas velocity in the dust measurement passage that self is the uniform cross section straight-through structure substantially and causes, make the sample gas that extracts in the process of described measurement passage of flowing through, part dust wherein can enter in the passage that optical transmitting set and dust sensor and dust measurement passage link, have the part dust settling simultaneously in the dust measurement passage, when accumulating, dust will cause when a certain amount of passage to stop up, influence measuring accuracy, even cause the measurement mechanism cisco unity malfunction.In addition, because the light intensity difference of emission when optical transmitting set detects at every turn, even detect the dust of same concentrations, the received measuring-signal of dust sensor also can be different, therefore the powder concentration measurement value can there are differences, and causes the powder concentration measurement result not accurate.
The utility model content
The purpose of this utility model provides a kind of high precision powder concentration measurement device, and this device can be eliminated not problem accurately of the measurement result that caused by the transmitting illuminant intensity error.
For achieving the above object, the utility model adopts following technical scheme: a kind of high precision powder concentration measurement device, comprise the dust measurement passage, bleed and pop one's head in and extraction fan, the dust measurement passage is provided with first dust sensor, this measurement mechanism also comprises the light unit and with reference to cavity, be provided with the reference light source interface and the second chengguang pipe that is positioned opposite with reference to the cavity first line of a couplet is logical, be provided with second dust sensor with reference to corresponding UNICOM on the cavity; Described dust measurement passage is the through type passage, and UNICOM is provided with the measurement light source interface and the first chengguang pipe that is positioned opposite on the dust measurement passage, and bleed probe and extraction fan correspondence are located at the two ends of described passage; Described smooth unit comprises total light source generator, and total light source generator is connected to measurement light source interface and reference light source interface by two optical fiber dividing equally total light beam.
Described dust measurement passage has contraction section, venturi section and diffuser successively along airflow direction, and described measurement light source interface, the first chengguang pipe and first dust sensor are arranged at the venturi section.
The dust measurement passage has iso-cross-section entrance to bleeding between probe at contraction section.
The dust measurement passage at diffuser to having the iso-cross-section outlet section between extraction fan.
The venturi section of dust measurement passage is an iso-cross-section venturi section.
The utility model is placed into device in the tested place in use, by optical fiber total light source is equally divided into two-beam, and a branch of light conducts to reference to cavity, utilizes second dust sensor to carry out the timing Zero calibration, makes the reference edge signal stabilization a fixed value; A branch of in addition light conducts to the dust measurement passage, by the dust concentration value signal of mixed gas in the real-time acquisition channel of first dust sensor, by disposal system the signal of measuring junction and reference edge is compared processing, makes measured value more accurate; In addition, utilize optical fiber to carry out light and connect, make this device measure passage in layout, can not be subjected to the restriction of space outerpace position during with reference to cavity and total light source generator, install, use is more flexible, topology layout can be more reasonable, and applicability is stronger.On device, the chengguang pipe is set, can absorbs light, in order to avoid the light retroeflection influences measuring accuracy.
Dust measurement passage of the present utility model adopts and shrinks the special design structure of diffusion more earlier, make air-flow in the dust measurement passage, produce Venturi effect, the air-flow a fluid stream increases, add the effect of extraction fan, make tested mix dust gas high velocity stream cross the measurement passage, and directly discharge at a high speed and measure outside the passage, to such an extent as to dust is difficult for producing sedimentation and accumulation in passage, in the long-term process of using continuously, can not take place to influence normal measurement because of latch up phenomenon.
The utility model is the fast measuring dust concentration at the scene, and uploads measurement data synchronously, has guaranteed measuring accuracy again simultaneously, has really realized monitoring dust concentration full-automatic, non-maintainingly; Be applicable under the coal mine, the dust measuring needs of occasion such as mine, plant working place, be particularly suitable in the mine that contains gas or coal dust explosion hazard, using.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that A-A among Fig. 1 is to synoptic diagram.
Embodiment
A kind of high precision powder concentration measurement device provided by the utility model as shown in Figure 1 and Figure 2, this device comprises dust measurement passage 7, with reference to cavity 2 and light unit, with reference to being sealed with clean calibrating gas in the cavity 2.
The utility model is placed into device in the tested place in use, and the probe 6 of bleeding is preferably in face of wind direction.When tested mix dust gas passes through to measure passage 7 at a high speed, after the illumination that measurement light source is sent is mapped to the interior mix dust gas of passage, 8 pairs of mixed gass that flow through of first dust sensor carry out the collection and the processing of dust concentration signal in real time, then display device and the signal hop of concentration value by outer setting are carried out data presentation in real time and upload.Simultaneously, signal processing of the present utility model has also adopted particular processing, with an optical fiber of dividing equally total light source is equally divided into two-beam, a branch of by utilizing second dust sensor 10 to carry out the timing Zero calibration behind the reference cavity 2 again, can make the reference edge signal stabilization a fixed value; A branch of in addition directly by the dust concentration value signal of mixed gas in first dust sensor, the 8 real-time acquisition channels, the signal with measuring junction and reference edge compares processing then, will make measured value more accurate like this.
Claims (6)
1. high precision powder concentration measurement device, comprise the dust measurement passage, bleed and pop one's head in and extraction fan, the dust measurement passage is provided with first dust sensor, it is characterized in that: this measurement mechanism also comprises the light unit and with reference to cavity, with reference to the logical reference light source interface and the second chengguang pipe that is positioned opposite that be provided with of the cavity first line of a couplet, be provided with second dust sensor with reference to corresponding UNICOM on the cavity, with reference to having reference gas in the cavity; Described dust measurement passage is the through type passage, and UNICOM is provided with the measurement light source interface and the first chengguang pipe that is positioned opposite on the dust measurement passage, and bleed probe and extraction fan correspondence are located at the two ends of described passage; Described smooth unit comprises total light source generator, and total light source generator is connected to measurement light source interface and reference light source interface by two optical fiber dividing equally total light beam.
2. high precision powder concentration measurement device according to claim 1, it is characterized in that: described dust measurement passage has contraction section, venturi section and diffuser successively along airflow direction, and described measurement light source interface, the first chengguang pipe and first dust sensor are arranged at the venturi section.
3. high precision powder concentration measurement device according to claim 2 is characterized in that: the dust measurement passage has iso-cross-section entrance to bleeding between probe at contraction section.
4. according to claim 2 or 3 described high precision powder concentration measurement devices, it is characterized in that: the dust measurement passage at diffuser to having the iso-cross-section outlet section between extraction fan.
5. according to claim 2 or 3 described high precision powder concentration measurement devices, it is characterized in that: the venturi section of dust measurement passage is an iso-cross-section venturi section.
6. high precision powder concentration measurement device according to claim 4 is characterized in that: the venturi section of dust measurement passage is an iso-cross-section venturi section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200915857U CN201425572Y (en) | 2009-05-27 | 2009-05-27 | High-precision device for measuring dust concentration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200915857U CN201425572Y (en) | 2009-05-27 | 2009-05-27 | High-precision device for measuring dust concentration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201425572Y true CN201425572Y (en) | 2010-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200915857U Expired - Lifetime CN201425572Y (en) | 2009-05-27 | 2009-05-27 | High-precision device for measuring dust concentration |
Country Status (1)
| Country | Link |
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| CN (1) | CN201425572Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053722A (en) * | 2016-05-20 | 2016-10-26 | 东莞市普锐美泰环保科技有限公司 | VOCs detection method and apparatus |
| CN108152178A (en) * | 2016-12-05 | 2018-06-12 | 天津普瑞爱尔科技有限公司 | β rays sensor for particulate matter concentration detection and its detection method |
| CN114324095A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Monitoring device for concentration of particle impurities in gas pipeline |
-
2009
- 2009-05-27 CN CN2009200915857U patent/CN201425572Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106053722A (en) * | 2016-05-20 | 2016-10-26 | 东莞市普锐美泰环保科技有限公司 | VOCs detection method and apparatus |
| CN108152178A (en) * | 2016-12-05 | 2018-06-12 | 天津普瑞爱尔科技有限公司 | β rays sensor for particulate matter concentration detection and its detection method |
| CN114324095A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Monitoring device for concentration of particle impurities in gas pipeline |
| CN114324095B (en) * | 2021-12-30 | 2023-10-24 | 中国石油大学(北京) | Monitoring device for particle impurity concentration in gas pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEZHOU GUANGLI SCIENCE + TECHNOLOGY CO., LTD. Free format text: FORMER NAME: GUANGLI SCIENCE + TECHNOLOGY DEVELOPMENT CO., LTD., ZHENGZHOU |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 450001 10 Hi Road, Zhengzhou hi tech Industry Development Zone, Henan, Zhengzhou Patentee after: Zhengzhou GL Tech Company Address before: 450001 10 Hi Road, Zhengzhou hi tech Industry Development Zone, Henan, Zhengzhou Patentee before: Guangli Science & Technology Development Co., Ltd., Zhengzhou |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 450001 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 10 Patentee after: Power Polytron Technologies Inc Address before: 450001 10 Hi Road, Zhengzhou hi tech Industry Development Zone, Henan, Zhengzhou Patentee before: Zhengzhou GL Tech Company |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100317 |