CN102297788B - Gas constant current sampling apparatus with miniatured sampling head and method - Google Patents
Gas constant current sampling apparatus with miniatured sampling head and method Download PDFInfo
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- CN102297788B CN102297788B CN 201110135028 CN201110135028A CN102297788B CN 102297788 B CN102297788 B CN 102297788B CN 201110135028 CN201110135028 CN 201110135028 CN 201110135028 A CN201110135028 A CN 201110135028A CN 102297788 B CN102297788 B CN 102297788B
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Abstract
The invention relates to the field of environmental protection equipment, and discloses a gas constant current sampling apparatus with multiple miniatured sampling heads and a method. Included are a cabinet, a casing carrier plate with a through hole, a micromotor, which is arranged in the cabinet, and a motor reel which passes through the through hole. A circle tray is equipped with a non-circular hole; an end of the motor reel passing through the through hole is fixed with the non-circular hole; and a plurality of supporting wheels are arranged between the circle tray and the casing carrier plate to support the circle tray on the casing carrier plate. A plurality of telescopic support bars are uniformly uniform distributed on the circle tray and near an edge of the circle tray; each telescopic support bar is equipped with a holder on top; the support bar is equipped with a miniatured sampling head which has horizontally arranged air intake and gas outlet. The apparatus of the present invention can rapid and effectively automatically adjust a flow of gas gathering and maintain a flow value preset before starting, so as to realize simultaneous sampling of multiple sampling heads.
Description
Technical field
The present invention relates to the environmental protection equipment technical field, relate in particular to a kind of gas constant-flow sampling device and method with mini-sampling heads.
Background technology
In the prior art, the cardinal principle of indoor particle thing sampling thief is with the sampling pump draw samples, adopts different steady flow measures and the method for time synchronisation, realizes the quantitative collection Atmospheric Grains, so that analysing particulates thing mean concentration within a certain period of time.Existing particle sampler mainly partly is comprised of membrane pump, variable valve, impact damper, flowmeter, electronic time control circuit, under-voltage indicating circuit and power supply etc.The weak point that existing atmosphere particulate matter sampler exists is mainly: 1, to cause gas flow pattern be one one in the use of membrane pump, but not continuous flow finally causes under total time integral, and total flow is inaccurate; 2, the used material of the membrane pump of sampling thief or flow apparatus for regulating can produce distortion when temperature variation, causes the variation of flow; 3, the desired gas flow can not be set before startup, but by the manual adjustments suspended body flowmeter required flow be set after starting, thereby can produce certain error, in addition, flow changes automatically to regulate and makes flow keep constant in sampling process; 4, membrane pump, surge flask and temperature control equipment cause that sampling thief is expensive, volume is large, be not easy to carry; If 5 monitor the particle of different-grain diameter or the constituent of analysing particulates thing need increase some sampling heads simultaneously, also to increase pump, flowmeter, surge flask etc. accordingly simultaneously, namely also increased accordingly cost, volume and weight.
Summary of the invention
The technical matters that (one) will solve
The purpose of this invention is to provide and a kind ofly when carrying out particle sampling, can be with a plurality of mini-sampling heads indoor, and can make simultaneously the gas continous-stable by the device and method of all mini-sampling heads.
(2) technical scheme
For achieving the above object, the present invention proposes a kind of gas constant-flow sampling device with mini-sampling heads, comprising:
Cabinet, it comprises casing antetheca, casing rear wall, casing left side wall, casing right side wall, casing top board and chassis backplane, described casing top board is provided with through hole;
Micromotor, it is arranged in the described cabinet, and the motor reel of described micromotor passes described through hole;
Round tray, its center is provided with non-circular hole, and described motor reel passes described through hole, and its end and described non-circular hole are fixedly installed, and be provided with a plurality of support wheels between described round tray and the described casing top board, be used for described round tray is supported on described casing top board;
A plurality of Telescopic supporting rods, it is evenly distributed on the place that keeps to the side, described round tray top, the top of each Telescopic supporting rod is provided with fixed mount, is provided with mini-sampling heads on the described fixed mount, and described mini-sampling heads has air intake opening and gas outlet and is horizontally disposed with.
Wherein, be provided with control circuit in the described cabinet.
Wherein, be provided with the photoelectric counter probe on the described casing top board, described round tray below is provided with anti-dazzling screen.
Wherein, be provided with axle bottom the described Telescopic supporting rod.
Wherein, be provided with positional punch on the Telescopic supporting rod, be provided with the location drift bolt in the described positional punch.
Wherein, be provided with accumulator in the described cabinet.
Wherein, be provided with the power adjustment distributor circuit in the described cabinet.
Wherein, the outer setting of described casing antetheca has display and operation keyboard.
A kind of method that gas is sampled comprises step:
S1, each Telescopic supporting rod are set to required different height;
S2, make each mini-sampling heads air intake opening one end along the direction of round tray rotation;
S3, turn on the power switch, whether observation display the display power supply under-voltage, if the not under-voltage time that the needed flow of gas sampling and required sampling then are set by pressing operation keyboard and observation display;
S4, startup micromotor, the motor reel of described micromotor begin to rotate the drive round tray and rotate, thereby the rotation of round tray has driven the rotation that the rotation of Telescopic supporting rod drives mini-sampling heads, and mini-sampling heads is moved in gas;
S5, when sampling working time to during the working time that sets in advance, the operating voltage that control circuit cuts off micromotor quits work micromotor.
Wherein, in described step S4, in the rotation process of described round tray, the photoelectric counter probe makes control circuit calculate round tray by anti-dazzling screen and rotates the required time of a circle, then continue to keep the operating voltage of giving micromotor if the flow value of the flow that calculates and setting is the same, if the flow that calculates from set in advance different, then the operating voltage of micromotor is given in the control circuit adjustment, until the flow that calculates is identical with the numerical value that sets in advance.
(3) beneficial effect
Technique scheme of the present invention has following advantage: device of the present invention is sampled a plurality of mini-sampling heads simultaneously, and gas is continuously by each mini-sampling heads, and automatically regulate fast and effectively the flow of gas production, the numerical value that flow is remained set in advance, simultaneously the present invention does not use pump, flowmeter, surge flask and attemperating unit, greatly reduces cost.
Description of drawings
Fig. 1 is the front elevation that the present invention has the gas constant-flow sampling device embodiment of mini-sampling heads;
Fig. 2 is the side view that the present invention has the gas constant-flow sampling device embodiment of mini-sampling heads.
Wherein, 1: operation keyboard; 2: display; 3: the casing antetheca; 4: the photoelectric counter probe; 5: anti-dazzling screen; 6: round tray; 7: support wheel; 8: non-circular hole; 9: micromotor; 10: motor reel; 11: fixed mount; 12: mini-sampling heads; 13: Telescopic supporting rod; 14: the casing top board; 15: power switch; 16: the casing rear wall; 17: the charger socket; 18: chassis backplane; 19: accumulator; 20: wiring board; 21: the power adjustment distributor circuit; 22: control circuit; 23: axle; 24: through hole; 25: cabinet; 26: the location drift bolt; 27: positional punch; 28: the casing left side wall; 29: the casing right side wall; 30: air intake opening; 31: the gas outlet.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for explanation the present invention, but are not used for limiting the scope of the invention.
Be illustrated in figure 1 as the front elevation with gas constant-flow sampling device embodiment of mini-sampling heads of the present invention; Fig. 2 is the side view of the gas constant-flow sampling device embodiment of mini-sampling heads of the present invention.Gas constant-flow sampling device with mini-sampling heads of the present invention comprises: cabinet 25, round tray 6, control circuit 22, Telescopic supporting rod 13, mini-sampling heads 12 etc.
The principle of work of apparatus of the present invention is: the sectional area that the flow of gas by the somewhere equals this place multiply by the flow velocity of gas, for example: sectional area is 1 square centimeter, flow velocity is 500 cm per minute, and flow is 500 cc/min so, and namely per minute is 500 milliliters.Because the sectional area of mini-sampling heads air intake opening be fix and can preset, so can utilize relative motion principle to make mini-sampling heads mobile and control its translational speed and just can reach needed flow in gas.
Specific operation process with gas constant-flow sampling device embodiment of mini-sampling heads of the present invention is: Telescopic supporting rod 13 is holded up, each Telescopic supporting rod 13 can be passed different positional punch 27 by location drift bolt 26 makes each Telescopic supporting rod 13 have different height, then mini-sampling heads 12 is fixed on the fixed mount 11, and make air intake opening 30 1 ends of each mini-sampling heads 12 along the direction of round tray 6 rotations, after the installation, turn on the power switch 15, whether observation display 2 the display power supply under-voltage, if show the under-voltage charging that then needs, if the not under-voltage time that the needed flow of gas sampling and required sampling then are set by pressing operation keyboard 1 and observation display 2, after setting up by the start key on the operation keyboard 1, the motor reel 10 of micromotor 9 begins to rotate drive round tray 6 and rotates, thereby the rotation of round tray 6 has driven the rotation that the rotation of Telescopic supporting rod 13 drives mini-sampling heads 12, make mini-sampling heads 12 mobile in gas, its speed that moves is the speed that gas enters air intake opening 30, the area that this speed multiply by air intake opening is exactly the flow that gas enters mini-sampling heads 12, in this process, photoelectric counter probe 4 just can make control circuit 22 calculate round tray 6 by anti-dazzling screen 5 and rotate the required time of a circle, and because the distance that the air intake opening of mini-sampling heads 12 30 rotates a circle is (for example: rotating the mobile distance of a circle is 100 centimetres) that pre-sets, and the area of air intake opening 30 is also preset, so control circuit 22 can calculate the flow of gas, and a flow that calculates compares with the flow that starts front setting, then continue to keep the operating voltage of giving micromotor 9 if the flow value of the flow that calculates and setting is the same, the rotating speed of micromotor 9 can be remained unchanged, like this, the actual gas flow is also just according to the carrying out that sets in advance.If the flow that calculates from set in advance different, then control circuit 22 is adjusted the operating voltage of giving micromotor 9, until just stop the same with the numerical value that sets in advance of the flow that calculates adjusted, and keep corresponding operating voltage to give micromotor 9, thereby make micromotor 9 keep corresponding rotating speed to keep gas flow constant.When sampling working time to during the working time that sets in advance, the operating voltage that control circuit 22 cuts off micromotors 9 quits work micromotor 9.Sampling work is finished like this, powered-down switch 15.At last the filtration unit in each mini-sampling heads is taken out, analyze the particle that it filters out.
The above only is embodiments of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (10)
1. the gas constant-flow sampling device with mini-sampling heads is characterized in that, comprising:
Cabinet (25), it comprises casing antetheca (3), casing rear wall (16), casing left side wall (28), casing right side wall (29), casing top board (14) and chassis backplane (18), described casing top board (14) is provided with through hole (24);
Micromotor (9), it is arranged in the described cabinet (25), and the motor reel (10) of described micromotor (9) passes described through hole (24);
Round tray (6), its center is provided with non-circular hole (8), described motor reel (10) passes described through hole (24), its end and described non-circular hole (8) are fixedly installed, and be provided with a plurality of support wheels (7) between described round tray (6) and the described casing top board (14), be used for described round tray is supported on described casing top board (14);
A plurality of Telescopic supporting rods (13), it is evenly distributed on the place that keeps to the side, described round tray (6) top, the top of each Telescopic supporting rod (13) is provided with fixed mount (11), be provided with mini-sampling heads (12) on the described fixed mount (11), described mini-sampling heads (12) has air intake opening (30) and gas outlet (31) and is horizontally disposed with.
2. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 1 is characterized in that, is provided with control circuit (22) in the described cabinet (25).
3. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 2 is characterized in that, is provided with photoelectric counter probe (4) on the described casing top board (14), and described round tray (6) below is provided with anti-dazzling screen (5).
4. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 3 is characterized in that, described Telescopic supporting rod (13) bottom is provided with axle (23).
5. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 4 is characterized in that, is provided with positional punch (27) on the Telescopic supporting rod (13), is provided with location drift bolt (26) in the described positional punch (27).
6. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 5 is characterized in that, is provided with accumulator (19) in the described cabinet (25).
7. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 6 is characterized in that, is provided with power adjustment distributor circuit (21) in the described cabinet (25).
8. the gas constant-flow sampling device with mini-sampling heads as claimed in claim 7 is characterized in that, the outer setting of described casing antetheca (3) has display (2) and operation keyboard (1).
9. the method that right to use requires each described gas constant-flow sampling device of 1-8 that gas is sampled is characterized in that, comprises step:
S1, each Telescopic supporting rod (13) is set to required different height;
S2, make each mini-sampling heads (12) air intake opening (30) one ends along the direction of round tray (6) rotation;
S3, turn on the power switch (15), whether observation display (2) the display power supply under-voltage, if the not under-voltage time that the needed flow of gas sampling and required sampling then are set by pressing operation keyboard (1) and observation display (2);
S4, startup micromotor (9), the motor reel of described micromotor (10) begins to rotate drive round tray (6) and rotates, the rotation of round tray (6) driven Telescopic supporting rod (13) thus rotation drive the rotation of mini-sampling heads (12), make mini-sampling heads (12) mobile in gas;
S5, when sampling working time to during the working time that sets in advance, the operating voltage that control circuit (22) cuts off micromotor (9) quits work micromotor (9).
10. the method that gas is sampled as claimed in claim 9, it is characterized in that, in described step S4, in the rotation process of described round tray, photoelectric counter probe (4) makes control circuit (22) calculate round tray (6) by anti-dazzling screen (5) and rotates the required time of a circle, the distance that the air intake opening of described mini-sampling heads rotates a circle pre-sets, and the area of air intake opening is preset, and described control circuit (22) can calculate the flow of gas; If the same operating voltage that then continues to keep giving micromotor (9) of the flow value of the flow that calculates and setting, if the flow that calculates from set in advance different, then control circuit (22) adjustment is given the operating voltage of micromotor (9), until the flow that calculates is identical with the numerical value that sets in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110135028 CN102297788B (en) | 2011-05-24 | 2011-05-24 | Gas constant current sampling apparatus with miniatured sampling head and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110135028 CN102297788B (en) | 2011-05-24 | 2011-05-24 | Gas constant current sampling apparatus with miniatured sampling head and method |
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| Publication Number | Publication Date |
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| CN102297788A CN102297788A (en) | 2011-12-28 |
| CN102297788B true CN102297788B (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110135028 Expired - Fee Related CN102297788B (en) | 2011-05-24 | 2011-05-24 | Gas constant current sampling apparatus with miniatured sampling head and method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928262A (en) * | 2012-07-26 | 2013-02-13 | 北京市劳动保护科学研究所 | Portable atmosphere sampler system with telescopic supporting bar |
| CN102928263B (en) * | 2012-08-27 | 2015-08-26 | 北京市劳动保护科学研究所 | There is the Portable atmosphere sampler system of folding type supporting bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3914979A (en) * | 1973-07-16 | 1975-10-28 | Environmental Systems Corp | System for collecting particulates from a fluid medium |
| CN1439098A (en) * | 2000-05-25 | 2003-08-27 | 加拿大环境部长 | Emission sampling apparatus and method |
| CN101007998A (en) * | 2007-01-22 | 2007-08-01 | 杭州浙大优创科技有限公司 | Direct microscopic method body cell/ microbe automatic counting instrument sampling device for milk |
| CN202066725U (en) * | 2011-05-24 | 2011-12-07 | 北京市劳动保护科学研究所 | Gas constant-flow sampling device with mini-sampling heads |
-
2011
- 2011-05-24 CN CN 201110135028 patent/CN102297788B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3914979A (en) * | 1973-07-16 | 1975-10-28 | Environmental Systems Corp | System for collecting particulates from a fluid medium |
| CN1439098A (en) * | 2000-05-25 | 2003-08-27 | 加拿大环境部长 | Emission sampling apparatus and method |
| CN101007998A (en) * | 2007-01-22 | 2007-08-01 | 杭州浙大优创科技有限公司 | Direct microscopic method body cell/ microbe automatic counting instrument sampling device for milk |
| CN202066725U (en) * | 2011-05-24 | 2011-12-07 | 北京市劳动保护科学研究所 | Gas constant-flow sampling device with mini-sampling heads |
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Granted publication date: 20130227 Termination date: 20180524 |