CN204575399U - The volume control device of middle large discharge gas and particle sampler - Google Patents
The volume control device of middle large discharge gas and particle sampler Download PDFInfo
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- CN204575399U CN204575399U CN201520240648.6U CN201520240648U CN204575399U CN 204575399 U CN204575399 U CN 204575399U CN 201520240648 U CN201520240648 U CN 201520240648U CN 204575399 U CN204575399 U CN 204575399U
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Abstract
The utility model provides the volume control device of a kind of middle large discharge gas and particle sampler, volume control device comprises at least one sampling channel, one air extractor and an overall channel, each sampling channel comprises from inlet sampling head, flow sensor and flow control valve, from inlet sampling head for gathering gas and particle, flow sensor is for detecting the flow in each sampling channel, each sampling channel is communicated with one end of overall channel by flow control valve, flow control valve is for regulating the flow of each sampling channel, the other end of overall channel is connected with air extractor, air extractor is used for bleeding to volume control device.The utility model has the advantage of, be convenient to expand multiple sampling channel, multiple project can be gathered simultaneously; The impact being subject to field power supply fluctuation can be avoided; Flow adjustment range is wider.
Description
Technical field
The utility model relates to gas and particle collection technical field, particularly relates to a kind of volume control device for middle large discharge gas and particle sampler.
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.
Utility model content
For solving the problems of the technologies described above, the utility model provides the volume control device of a kind of middle large discharge gas and particle sampler, and it can control the constant flow of sample in sampling channel, to improve accuracy of measurement.
In order to solve the problem, the utility model 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.
The utility model has the advantage of, 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 the utility model gas and particle sampling equipment.
Embodiment
In providing the utility model below in conjunction with accompanying drawing, the embodiment of the volume control device of large discharge gas and particle sampler elaborates.
See Fig. 1, in the utility model, 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 the utility model large discharge gas 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 utility model, 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 utility model, 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 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 utility model, 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 preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
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. volume control device 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520240648.6U CN204575399U (en) | 2015-04-21 | 2015-04-21 | The volume control device of middle large discharge gas and particle sampler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520240648.6U CN204575399U (en) | 2015-04-21 | 2015-04-21 | The volume control device of middle large discharge gas and particle sampler |
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| CN204575399U true CN204575399U (en) | 2015-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819873A (en) * | 2015-04-21 | 2015-08-05 | 上海新拓分析仪器科技有限公司 | Flow control device of medium-large flow gas and particles and application method thereof |
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2015
- 2015-04-21 CN CN201520240648.6U patent/CN204575399U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104819873A (en) * | 2015-04-21 | 2015-08-05 | 上海新拓分析仪器科技有限公司 | Flow control device of medium-large flow gas and particles and application method thereof |
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