CN104819873A - Flow control device of medium-large flow gas and particles and application method thereof - Google Patents
Flow control device of medium-large flow gas and particles and application method thereof Download PDFInfo
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- CN104819873A CN104819873A CN201510188359.0A CN201510188359A CN104819873A CN 104819873 A CN104819873 A CN 104819873A CN 201510188359 A CN201510188359 A CN 201510188359A CN 104819873 A CN104819873 A CN 104819873A
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Abstract
The invention provides a flow control device of medium-large flow gas and particles and an application method. The flow control device comprises at least one sampling channel, an air extractor and an overall channel; each sampling channel comprises a sampling head with an air inlet, a flow sensor and a flow adjusting valve, wherein the sampling head with the air inlet is used for collecting gas and particles, the flow sensor is used for detecting the flow in each sampling channel, and each sampling channel is communicated with one end of the total channel through the flow adjusting valve; the flow adjusting valve is used for adjusting the flow of each sampling channel, another end of the overall channel is connected with the air extractor, and the air extractor is used for extracting the flow control device. The flow control device provided by the invention has the advantages of being convenient to expand a plurality of sampling channels and being capable of collecting various projects at the same time; furthermore, the influence caused by the drastic fluctuation of a wild power supply can be prevented, and the flow adjusting scope is wider.
Description
Technical field
The present invention relates to gas and particle collection technical field, particularly relate to a kind of volume control device for middle large discharge gas and particle sampler and using method.
Background technology
Middle large discharge gas and particle sampler is used to field sampling, for the succession of learning gas or particle.This kind of sampling thief generally only has single passage, can only gather a kind of project at every turn, and the flow control methods of its reason mainly this kind of sampling thief controls alternating-current brushless to bleed the power of motor, thus control sampling flow.This mode has three deficiencies:
One is to expand multi-channel sampling, gathers multiple project simultaneously;
Two is very large by the stability influence of power supply, and greatly namely power-supply fluctuation loses flow regulation ability;
Three is the properties influence by exchanging motor of bleeding, and adjustable extent is very little.
Summary of the invention
For solving the problems of the technologies described above, the invention provides volume control device and the using method of a kind of middle large discharge gas and particle sampler, it can control the constant flow of sample in sampling channel, to improve accuracy of measurement.
In order to solve the problem, the invention provides the volume control device of a kind of middle large discharge gas and particle sampler, comprise at least one sampling channel, one air extractor and an overall channel, sampling channel described in each comprises from inlet sampling head, flow sensor and flow control valve, described from inlet sampling head for gathering gas and particle, described flow sensor is for detecting the flow in sampling channel described in each, sampling channel described in each is communicated with one end of described overall channel by described flow control valve, described flow control valve is for regulating the flow of sampling channel described in each, the other end of described overall channel is connected with described air extractor, described air extractor is used for bleeding to described volume control device.
Further, described air extractor can meet the total power of fully loaded 150% of design, and the input voltage of fixing described air extractor is constant.
Further, describedly can to sample special sponge filter for the cutter of TSP, PM10, PM2.5 or PM1.0 or gas phase from inlet sampling head.
A using method for above-mentioned volume control device, comprises the steps: that the input voltage of air extractor is fixed on a setting value by (1); (2) flow in sampling channel measured by described flow sensor; (3) flow measurements measured by described flow sensor and a flow setting value compare, if described flow measurements and described flow setting value unequal, then regulate described flow control valve, to make described flow measurements equal with described flow setting value.
The invention has the advantages that, adopt multiple sampling channel, multiple project can be gathered simultaneously; Stablize the input voltage of air extractor, simultaneously by the flow of flow regulation valve regulation sampling channel, thus make corresponding sampling channel constant flow, thus improve the accuracy of sampled measurements.
Accompanying drawing explanation
Fig. 1 is the structural representation of gas of the present invention and particle sampling equipment.
Embodiment
Below in conjunction with accompanying drawing, middle large discharge gas provided by the invention and the volume control device of particle sampler and the embodiment of using method are elaborated.
See Fig. 1, in the present invention, the volume control device of large discharge gas and particle sampler comprises at least one sampling channel 1, one air extractor 2 and an overall channel 6.One end of described overall channel 6 is communicated with sampling channel 1, and the other end is connected with described air extractor 2, and described air extractor 2 is for bleeding to the volume control device of large discharge gas of the present invention and particle sampler.Further, described air extractor can meet the total power of fully loaded 150% of design, and the input voltage of fixing described air extractor 2 is constant, immobilizes to make the output power of described air extractor 2.
Sampling channel 1 described in each comprises from inlet sampling head 4, flow sensor 8 and flow control valve 3.
Described from inlet sampling head 4 for gathering gas and particle.In this embodiment, schematically enumerate two sampling channels 1, described two sampling channel 1 correspondences be respectively PM2.5 cutter and PM10 cutter from inlet sampling head 4.Describedly can to sample special sponge filter for the cutter of TSP, PM10, PM2.5 or PM1.0 or gas phase from inlet sampling head 4, it is existing parts, is not repeated herein.In the present invention, sampling channel 1 described in each can connect respectively incising control identical from inlet sampling head 4, also can connect respectively incising control different from inlet sampling head 4.Each sampling channel 1 connect respectively incising control different from inlet sampling head 4, can realize gathering the particle of different-grain diameter by a set of equipment, reduce costs.
Described flow sensor 8 is for detecting the flow of gas in sampling channel 1 described in each or particle.In this embodiment, described from inlet sampling head 4, connected by pipeline between flow sensor 8 and flow control valve 3, so that gas or particle pass through.
Described in each, sampling channel 1 is communicated with one end of described overall channel 6 by described flow control valve 3, described flow control valve 3 is for regulating the flow of sampling channel 1 described in each, by the size regulating described flow control valve 3 to open, adjustable described air extractor 2 to the size of bleeding of described sampling channel 1, thus can regulate the flow of sampling channel 1 described in each.Adopt this sampling channel 1 if do not need, then close the flow control valve 3 of this sampling channel 1 correspondence completely, this sampling channel 1 can not be acted on to make air extractor 2.
If the flow in the sampling channel 1 that described flow sensor 8 detects is greater than the flow setting value of this sampling channel 1, this flow control valve 3 scope of opening then is regulated to reduce, the input making air extractor 2 act on sampling channel 1 reduces, the interior flow of sampling channel 1 is reduced, until equal with flow setting value; If the flow in the sampling channel 1 that described flow sensor 8 detects is less than the flow setting value of this sampling channel 1, this flow control valve 3 scope of opening then is regulated to increase, the input making air extractor 2 act on sampling channel 1 increases, the interior flow of sampling channel 1 is increased, until equal with flow setting value.In the present invention, the volume control device of described middle large discharge gas and particle sampler comprises a control system (not indicating in accompanying drawing), flow value in the sampling channel 1 that described flow sensor 8 detects can carry out with comparing of the flow setting value in this sampling channel 1 in described control system, meanwhile, the unlatching scope of described flow control valve 3 is also controlled by described control system.
The present invention also provides a kind of using method of above-mentioned volume control device, comprises the steps:
(1) input voltage of air extractor 2 is fixed on a setting value, fixes to make the output power of air extractor 2.The output power of described air extractor 2 is fixed, and volume control device is diminished by the stability influence of power supply, and power-supply fluctuation greatly also can not lose flow regulation ability; And can not by the properties influence exchanging motor of bleeding, volume control device range of adjustment is large.
(2) flow in sampling channel 1 measured by described flow sensor 8.The flow in sampling channel 1 measured in real time by described flow sensor 8, can obtain the real-time traffic in sampling channel 1.
(3) flow measurements measured by described flow sensor 8 and a flow setting value compare, if described flow measurements and described flow setting value unequal, then regulate described flow control valve 3, to make described flow measurements equal with described flow setting value, thus constant flow in sampling channel 1 can be controlled.In the present invention, the volume control device of described middle large discharge gas and particle sampler comprises a control system (not indicating in accompanying drawing), flow value in the sampling channel 1 that described flow sensor 8 detects can carry out with comparing of the flow setting value in this sampling channel 1 in described control system, meanwhile, the unlatching scope of described flow control valve 3 is also controlled by described control system.
If the flow in the sampling channel 1 that described flow sensor 8 detects is greater than the flow setting value of this sampling channel 1, this flow control valve 3 scope of opening then is regulated to reduce, the input making air extractor 2 act on sampling channel 1 reduces, the interior flow of sampling channel 1 is reduced, until equal with flow setting value; If the flow in the sampling channel 1 that described flow sensor 8 detects is less than the flow setting value of this sampling channel 1, this flow control valve 3 scope of opening then is regulated to increase, the input making air extractor 2 act on sampling channel 1 increases, the interior flow of sampling channel 1 is increased, until equal with flow setting value.
Adopt this sampling channel 1 if do not need, then close the flow control valve 3 of this sampling channel 1 correspondence completely, this sampling channel 1 can not be acted on to make air extractor 2.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the volume control device of large discharge gas and particle sampler in a kind, it is characterized in that, comprise at least one sampling channel, one air extractor and an overall channel, sampling channel described in each comprises from inlet sampling head, flow sensor and flow control valve, described from inlet sampling head for gathering gas and particle, described flow sensor is for detecting the flow in sampling channel described in each, sampling channel described in each is communicated with one end of described overall channel by described flow control valve, described flow control valve is for regulating the flow of sampling channel described in each, the other end of described overall channel is connected with described air extractor, described air extractor is used for bleeding to described volume control device.
2. volume control device according to claim 1, is characterized in that, described air extractor can meet the total power of fully loaded 150% of design, and the input voltage of fixing described air extractor is constant.
3. sampling channel according to claim 1, is characterized in that, describedly can to sample special sponge filter for the cutter of TSP, PM10, PM2.5 or PM1.0 or gas phase from inlet sampling head.
4. a using method for volume control device according to claim 1, is characterized in that: comprise the steps: that the input voltage of air extractor is fixed on a setting value by (1); (2) flow in sampling channel measured by described flow sensor; (3) flow measurements measured by described flow sensor and a flow setting value compare, if described flow measurements and described flow setting value unequal, then regulate described flow control valve, to make described flow measurements equal with described flow setting value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510188359.0A CN104819873A (en) | 2015-04-21 | 2015-04-21 | Flow control device of medium-large flow gas and particles and application method thereof |
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| CN201510188359.0A CN104819873A (en) | 2015-04-21 | 2015-04-21 | Flow control device of medium-large flow gas and particles and application method thereof |
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| TWM391652U (en) * | 2010-06-14 | 2010-11-01 | Faxsonde Inc | Switching device of multi-channel sampling gas |
| CN202582955U (en) * | 2012-01-04 | 2012-12-05 | 武汉宇虹环保产业发展有限公司 | Dual-passage flow distribution type air particulate matter cutter |
| US20130036837A1 (en) * | 2011-08-10 | 2013-02-14 | National Chiao Tung University | Multi-filter pm 10-pm 2.5 sampler |
| CN203053947U (en) * | 2013-01-17 | 2013-07-10 | 清华大学 | Multi-channel multi-component fixed source sampling analysis device |
| CN103776666A (en) * | 2014-02-17 | 2014-05-07 | 青岛众瑞智能仪器有限公司 | Six-channel air particle sampling device |
| CN103913355A (en) * | 2014-04-05 | 2014-07-09 | 青岛共好检测技术有限公司 | Sampler for multi-channel gases and particulate matters and using method of sampler |
| CN204575399U (en) * | 2015-04-21 | 2015-08-19 | 上海新拓分析仪器科技有限公司 | The volume control device of middle large discharge gas and particle sampler |
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2015
- 2015-04-21 CN CN201510188359.0A patent/CN104819873A/en active Pending
Patent Citations (8)
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| CN1808095A (en) * | 2005-01-21 | 2006-07-26 | 清华大学 | Multi-channel PM2.5 particle sampler |
| TWM391652U (en) * | 2010-06-14 | 2010-11-01 | Faxsonde Inc | Switching device of multi-channel sampling gas |
| US20130036837A1 (en) * | 2011-08-10 | 2013-02-14 | National Chiao Tung University | Multi-filter pm 10-pm 2.5 sampler |
| CN202582955U (en) * | 2012-01-04 | 2012-12-05 | 武汉宇虹环保产业发展有限公司 | Dual-passage flow distribution type air particulate matter cutter |
| CN203053947U (en) * | 2013-01-17 | 2013-07-10 | 清华大学 | Multi-channel multi-component fixed source sampling analysis device |
| CN103776666A (en) * | 2014-02-17 | 2014-05-07 | 青岛众瑞智能仪器有限公司 | Six-channel air particle sampling device |
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| CN204575399U (en) * | 2015-04-21 | 2015-08-19 | 上海新拓分析仪器科技有限公司 | The volume control device of middle large discharge gas and particle sampler |
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