CN116539380B - Constant temperature constant current atmospheric sampling device - Google Patents
Constant temperature constant current atmospheric sampling device Download PDFInfo
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- CN116539380B CN116539380B CN202310707626.5A CN202310707626A CN116539380B CN 116539380 B CN116539380 B CN 116539380B CN 202310707626 A CN202310707626 A CN 202310707626A CN 116539380 B CN116539380 B CN 116539380B
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- 238000005070 sampling Methods 0.000 title claims abstract description 108
- 238000010521 absorption reaction Methods 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims description 40
- 238000007789 sealing Methods 0.000 claims description 26
- 238000002156 mixing Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 26
- 230000008569 process Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a constant-temperature constant-current atmospheric sampling device, which comprises a sampling box and an air channel collecting mechanism arranged on the sampling box, wherein a constant-temperature control unit and an air flow control unit are arranged in the sampling box, the air channel collecting mechanism comprises an air inlet, a porous sieve plate absorbing bottle, an electromagnetic valve, a flow sensor, an air pump and an air outlet which are sequentially connected, a lower porous plate and an upper porous plate are transversely arranged in the porous sieve plate absorbing bottle, a first through hole for sampling air to pass through is arranged on the lower porous plate, a second through hole for sampling air to pass through is arranged on the upper porous plate, and at least one of the lower porous plate and the upper porous plate can be driven so that the first through hole and the second through hole are combined to form an air conveying channel with different apertures. According to the constant-temperature constant-current atmospheric sampling device provided by the invention, in the use process, the size of the gas conveying channel can be adjusted, so that the sampling gas is dispersed to form bubbles with proper size, and the contact area and the contact time of the sampling gas and the absorption liquid are increased.
Description
Technical Field
The invention relates to the technical field of atmospheric sampling, in particular to a constant temperature and constant current atmospheric sampling device.
Background
The collection method of atmospheric sampling is generally divided into two types, namely a direct sampling method and an enrichment (concentration) sampling method. The direct sampling method is suitable for the condition that the concentration of the detected component in the atmosphere is high or the monitoring method is very sensitive, and the analysis and measurement requirements can be met by directly adopting a small amount of gas. The results of the direct sampling method reflect the average concentration of atmospheric contaminants at the sampling instant or in a short time. The enrichment (concentration) sampling method is suitable for the condition that the concentration of pollutants in the atmosphere is very low, and the direct sampling can not meet the analysis and measurement requirements, and at the moment, a certain measure is needed to be adopted to concentrate the pollutants in the atmosphere, so that the requirements of the sensitivity of the monitoring method are met. Because the concentrated sampling method takes longer time for sampling, the obtained analysis result reflects the average concentration of the atmospheric pollutants in the concentrated sampling time.
The enrichment (concentration) sampling method is divided into a solution absorption method, a packed column retention method, a filter material sampling method, a low-temperature condensation sampling method and a low-temperature condensation sampling method according to the monitoring purpose and requirements, wherein air to be detected is led into an absorption tube filled with absorption liquid by an air extractor in the solution absorption method at a certain flow, and the component to be detected and the absorption liquid are subjected to chemical reaction or physical action, so that pollutants to be detected are dissolved in the absorption liquid. And after the sampling is finished, taking out the absorption liquid, analyzing the content of the detected component in the absorption liquid, and calculating the concentration of the air pollutant according to the sampling volume and the measuring result. The invention patent application with the application publication number of CN 01846598A, the application publication date of 2010, 9 months and 29 days and the name of a time-division multi-sample constant-temperature constant-current atmospheric sampler comprises a singlechip and two air paths, wherein each air path comprises an air inlet, an absorption bottle, an electromagnetic valve, a flow sensor, an air pump and an air outlet which are sequentially connected, the air inlet is connected with at least two absorption bottles in parallel through a connecting pipe, each absorption bottle is connected with one electromagnetic valve in series and is communicated with a drying bottle, the absorption bottle is arranged in an incubator, a temperature sensor and a temperature controller are arranged in the incubator, and the electromagnetic valve, the flow sensor, the temperature controller and the air pump are all electrically connected with the singlechip. The patent application is in the during operation, under the control of singlechip, the absorption bottle sampling, the solenoid valve is opened, the aspiration pump work, under the appeal effect of aspiration pump, gas is discharged to the atmosphere after air inlet, connecting pipe, absorption bottle, connecting pipe, drying bottle, flow sensor, buffer bottle, aspiration pump, gas vent, through thermostated container, air pump and flow sensor control temperature and gaseous flow respectively, realize constant temperature constant current sampling.
The absorption tube (absorption bottle) can be divided into 3 types of bubble type absorption tubes (bottles), impact type absorption tubes (bottles) and porous sieve plate absorption tubes (bottles) according to the difference of absorption principles, the absorption efficiency of a solution absorption method is mainly determined by the absorption speed, the absorption speed is also determined by the dissolution speed of a substance to be detected and the contact area and the contact time of the substance to be detected and the absorption liquid, sampling gas in the porous sieve plate absorption tubes (bottles) can form very small bubbles after passing through the porous sieve plates, compared with the bubble type absorption tubes (bottles) and the impact type absorption tubes (bottles), the retention time of the gas can be prolonged, the gas-liquid contact area is greatly increased, the absorption effect is improved, the absorption method is usually used in a constant-temperature constant-current atmospheric sampler, but in the actual use process, the absorption speed of the substance to be detected is different due to the fact that the property of the substance to be detected is different, the aperture requirement on the porous sieve plate is also different, the size of the porous through holes in the existing porous sieve plate absorption tube (bottles) is fixed, and the absorption efficiency of the porous sieve plate can not be adjusted according to the property of the substance to be detected and the size of the porous sieve plate in the atmospheric condition.
Disclosure of Invention
The invention aims to provide a constant-temperature constant-current atmospheric sampling device, which solves the technical problems in the related art.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a constant temperature constant current atmospheric sampling device, is in including collecting box and setting gas circuit collection mechanism on the collecting box, be provided with thermostatic control unit and gas flow control unit in the collecting box, gas circuit collection mechanism is including air inlet, porous sieve absorption bottle, solenoid valve, flow sensor, aspiration pump and the gas vent that connect gradually, transversely be provided with porous plate and last porous plate in the porous sieve absorption bottle, be provided with the first through-hole that supplies the sampling gas to pass through on the porous plate down, be provided with the second through-hole that supplies the sampling gas to pass through on the porous plate, at least one of porous plate and last porous plate can be driven so that first through-hole and second through-hole combination form the different gas delivery channel of aperture down.
The constant temperature constant current atmospheric sampling device, porous sieve plate absorption bottle includes the bottle, the bottom of bottle is provided with the intake pipe, the open gas outlet that forms in top of bottle, detachable is connected with the sealing body on the gas outlet, lower perforated plate and last perforated plate pass through the connecting piece with the sealing body is connected.
According to the constant-temperature constant-current atmospheric sampling device, the aperture of the first through hole is larger than or equal to that of the second through hole.
According to the constant-temperature constant-current atmospheric sampling device, the radial size of the lower porous plate and the radial size of the upper porous plate are smaller than the cross-sectional size of the bottle body.
The constant temperature constant current atmospheric sampling device further comprises a connector, wherein the connector is arranged between the upper porous plate and the lower porous plate, an upper diversion layer, a mixing layer and a lower diversion layer are sequentially arranged in the connector from top to bottom, and the upper diversion layer and the lower diversion layer respectively correspond to the upper porous plate and the lower porous plate.
According to the constant-temperature constant-current atmospheric sampling device, the upper diversion layer is provided with the plurality of upper diversion holes, and the lower diversion layer is provided with the plurality of lower diversion holes.
According to the constant-temperature constant-current atmospheric sampling device, the lower connecting cavity is arranged between the lower porous plate and the connecting body.
According to the constant-temperature constant-current atmospheric sampling device, the upper porous plate and the connecting body are provided with the upper connecting cavity therebetween.
According to the constant-temperature constant-current atmospheric sampling device, the side walls of the lower connecting cavity, the mixing cavity and the upper connecting cavity are provided with the opening parts.
The constant temperature constant current atmospheric sampling device further comprises a stirring assembly, wherein the stirring assembly is arranged on the upper surface of the lower circular connecting piece and is used for stirring gas and liquid in the mixing layer.
The invention has the beneficial effects that: the porous sieve plate absorption bottle is internally and transversely provided with a lower porous plate and an upper porous plate, and a first through hole on the lower porous plate and a second through hole on the upper porous plate are combined to form a gas conveying channel with adjustable size, so that in the use process, the size of the gas conveying channel can be adjusted according to the property of a substance to be detected and the existing form of the substance to be detected in the atmosphere, so that sampling gas is dispersed to form bubbles with proper size, the contact area and contact time of the sampling gas and an absorption liquid are increased, and the accuracy of monitoring the gas sampling by the absorption liquid is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic diagram of an overall perspective structure of a constant temperature and constant flow atmospheric sampling device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a gas circuit collection mechanism of a constant temperature and constant current atmospheric sampling device according to an embodiment of the present invention;
fig. 3 is a schematic perspective view of a porous sieve plate absorption bottle of the constant temperature and constant flow atmospheric sampling device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the installation of a lower porous plate and an upper porous plate of a constant temperature and constant flow atmospheric sampling device according to an embodiment of the present invention;
FIG. 5 is a schematic diagram showing the installation of a lower porous plate and an upper porous plate of a constant temperature and constant flow atmospheric sampling device according to another embodiment of the present invention;
FIG. 6 is a schematic perspective view of a connector of a constant temperature and constant flow air sampling device according to another embodiment of the present invention;
FIG. 7 is a schematic diagram showing a second perspective view of a connector of a constant temperature and constant flow air sampling device according to another embodiment of the present invention;
FIG. 8 is a schematic diagram showing the installation of a lower porous plate and an upper porous plate of a constant temperature and constant flow atmospheric sampling device according to still another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a connection structure of a constant temperature and constant current atmospheric sampling device according to still another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a connector of a constant temperature and constant flow air sampling device according to another embodiment of the present invention;
FIG. 11 is a schematic view illustrating the installation of an upper circular connector of a constant temperature and constant flow air sampling device according to another embodiment of the present invention;
FIG. 12 is a schematic structural diagram of a rotary driving assembly of a constant temperature and constant flow air sampling device according to another embodiment of the present invention;
Fig. 13 is a schematic structural view of a fixed ratchet of a constant temperature and constant current atmospheric sampling device according to still another embodiment of the present invention.
Reference numerals illustrate:
1. a bracket; 2. a collection box; 20. a constant temperature control unit; 3. the gas circuit acquisition mechanism; 30. an air inlet; 31. an electromagnetic valve; 32. a flow sensor; 33. an air extracting pump; 34. an exhaust port; 4. a porous sieve plate absorption bottle; 40. a bottle body; 41. an air inlet pipe; 42. an air outlet; 43. a sealing body; 44. a lower porous plate; 441. a first through hole; 442. a lower annular plate; 45. a porous plate is arranged on the upper part; 451. a second through hole; 452. an upper annular plate 453, a vertical plate; 46. a connection structure; 461. a fixed shaft; 462. a rotation shaft; 463. a ring member; 464. a rotating member; 4641. a cylindrical open cavity; 465. a fixing part; 466. a fixing member; 5. a connecting body; 50. an upper guide layer; 501. an upper deflector hole; 51. a mixed layer; 511. a mixing chamber; 52. a lower guide layer; 521. a lower deflector hole; 53. a lower connecting cavity; 54. an upper connecting cavity; 55. an opening portion; 56. an upper circular connecting piece; 561. an elastomer; 57. a lower circular connector; 58. an elastic connection member; 6. a stirring assembly; 61. a stirring shaft; 62. stirring blades; 7. a rotary drive assembly; 70. an annular mounting seat; 71. a fan blade; 72. a fixed ratchet; 721. helical teeth; 722. arc tooth slots; 73. the ratchet wheel is driven.
Description of the embodiments
In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in further detail with reference to fig. 1 to 13.
In the embodiment of the invention, a constant temperature and constant flow atmospheric sampling device is provided, which comprises a collecting box 2 and an air channel collecting mechanism 3 arranged on the collecting box 2, wherein a constant temperature control unit 20 and an air flow control unit are arranged in the collecting box 2, the air channel collecting mechanism 3 comprises an air inlet 30, a porous sieve plate absorbing bottle 4, an electromagnetic valve 31, a flow sensor 32, an air extracting pump 33 and an air outlet 34 which are sequentially connected, a lower porous plate 44 and an upper porous plate 45 are transversely arranged in the porous sieve plate absorbing bottle 4, a first through hole 441 for sampling air to pass through is arranged on the lower porous plate 44, a second through hole 451 for sampling air to pass through is arranged on the upper porous plate 45, and at least one of the lower porous plate 44 and the upper porous plate 45 can be driven so that the first through hole 441 and the second through hole 451 are combined to form an air dispersing channel with different apertures.
Specifically, constant temperature constant current atmospheric sampling device includes collection box 2 and support 1, support 1 is used for supporting collection box 2 in order to fix the position that needs to gather with collection box 2, thermostatic control unit 20 and gas flow control unit set up in the inside of collection box, can control the inside temperature of collection box 2 through thermostatic control unit 20, gas flow control unit can be flow sensor 32, can control the gas flow through flow sensor 32 and controller, thereby make collection box 2 realize constant temperature constant current collection, gas circuit collection mechanism 3 on the box has at least one, gas circuit collection mechanism 3 is including the air inlet 30 that connects gradually, porous sieve plate absorption bottle 4, solenoid valve 31, flow sensor 32, aspiration pump 33 and gas vent 34, when carrying out the atmospheric sampling, aspiration pump 33 work, solenoid valve 31 is opened, gas is through air inlet 30, porous absorption bottle 4, solenoid valve 31, flow sensor 32, exhaust vent 33 and 34 back row to atmosphere, further, porous absorption bottle 4 on each collection mechanism 3 has two at least to control the gas circuit, respectively have two to absorb the sieve plate through porous sieve plate 4, the porous sieve plate 4 is connected with porous sieve plate 4 through porous sieve plate 4 and porous sieve plate absorption bottle 4, the porous sieve plate 4 is connected with porous sieve plate 4 through the porous sieve plate absorption bottle 4 is connected with porous sieve plate 4, the porous sieve plate 4 is so that is connected with the porous sieve plate 4 and has the porous sieve plate absorption bottle 4 is connected.
In this embodiment, the porous sieve plate absorption bottle 4 includes a bottle body 40, the bottom of the bottle body 40 is provided with an air inlet pipe 41, the top of the bottle body 40 is provided with an air outlet pipe, the lower porous plate 44 and the upper porous plate 45 are transversely arranged in the bottle body 40, a plurality of first through holes 441 are sequentially arranged on the lower porous plate 44 at intervals, a plurality of second through holes 451 are sequentially arranged on the upper porous plate 45 at intervals, preferably, the lower porous plate 44 and the upper porous plate 45 are both circular plates and are attached together, the first through holes 441 are at least communicated with one second through hole 451, so that the first through holes 441 and the second through holes 451 are communicated to form a gas conveying channel through which sampling gas can pass, after the sampling gas is conveyed to the bottle body 40 from the air inlet pipe 41, a plurality of small bubbles are formed through the gas conveying channel and are contacted with an absorption liquid, so that the contact area and the absorption time of the sampling gas and the liquid can be increased, and the reaction effect of the sampling gas and the sampling gas can be improved.
In this embodiment, at least one of the lower porous plate 44 and the upper porous plate 45 is provided to be adjustable, the lower porous plate 44 is fixedly provided, the upper porous plate 45 is provided to be rotatably adjustable, so that by rotating the upper porous plate 45, the second through holes 451 and the first through holes 441 can be made to have different corresponding positions, thereby forming a gas conveying passage whose aperture can be changed, so that the size of the gas conveying passage can be adjusted according to the nature of a substance to be measured and the existence form in the atmosphere, so that the bubble size when the sampling gas passes through the gas conveying passage is changed, for example: the first through hole 441 is a large through hole with larger aperture, the second through hole 451 includes a large dispersing hole and a small dispersing hole which are arranged at intervals in sequence, the aperture of the large dispersing hole is the same as that of the first through hole 441, and the aperture of the small dispersing hole is smaller than that of the first through hole 441, so when the upper porous plate 45 rotates to the coaxial of each large dispersing hole and the first through hole 441, the first through hole 441 and the large dispersing hole form a gas conveying channel with the same radial dimension, the aperture of the gas conveying channel for gas to pass through is in the largest state, when the upper porous plate 45 rotates to the coaxial of the small dispersing hole and the first through hole 441, sampling gas is conveyed to the small dispersing hole after passing through the first through hole 441 to form smaller bubbles, and the gas conveying channel is in a structure with the radial dimension changed.
The embodiment of the invention provides a constant temperature and constant flow atmospheric sampling device, which comprises a collecting box 2 and an air channel collecting mechanism 3 arranged on the collecting box 2, wherein the air channel collecting mechanism 3 comprises an air inlet 30, a porous sieve plate absorbing bottle 4, an electromagnetic valve 31, a flow sensor 32, an air pump 33 and an air outlet 34 which are sequentially connected, a lower porous plate 44 and an upper porous plate 45 are transversely arranged in the porous sieve plate absorbing bottle 4, and a gas conveying channel with adjustable size is formed by combining a first through hole 441 on the lower porous plate 44 and a second through hole 451 on the upper porous plate 45, so that in the use process, the size of the gas conveying channel can be adjusted according to the property of a substance to be detected and the existence form thereof in the atmosphere, so that the sampled gas is dispersed to form bubbles with proper size, the contact area and the contact time of the sampled gas and an absorbing liquid are increased, and the accuracy of the absorbing liquid on gas sampling monitoring is ensured.
In the embodiment provided by the invention, preferably, the porous sieve plate absorption bottle 4 comprises a bottle body 40, an air inlet pipe 41 is arranged at the bottom of the bottle body 40, the air inlet pipe 41 is communicated with the air inlet 30 through a connecting pipe, the top of the bottle body 40 is opened to form an air outlet 42, a sealing body 43 is detachably connected to the air outlet 42, the lower porous plate 44 and the upper porous plate 45 are connected with the sealing body 43 through connecting pieces, the sealing body 43 is of a cylindrical sealing structure with the size corresponding to the air outlet 42, an air outlet part is arranged on the sealing body 43 and is connected with the air sucking pump 33 through an air outlet pipe, a connecting structure 46 is arranged on the sealing body 43, the lower porous plate 44 and the upper porous plate 45 are both arranged on the connecting structure 46, at least one of the lower porous plate 44 and the upper porous plate 45 is adjustably connected with the connecting structure 46, the lower porous plate 44 or the upper porous plate 45 is limited along the axis direction of the connecting structure 46, but the lower porous plate 44 or the upper porous plate 45 can move along the circumferential direction of the connecting structure 46, the lower porous plate 44 is fixedly arranged on the connecting structure 46, the upper porous plate 45 is rotatably arranged on the air outlet 45 and is correspondingly arranged on the air inlet pipe 45, the upper porous plate 45 and the air inlet pipe 45 is positioned on the bottle body and is positioned on the bottle body 45, a small position of the bottle and is formed by the upper porous plate 45 and is positioned on the bottle 45 and a small position of the porous plate 45 and is positioned on the bottle 45.
In the embodiment provided by the invention, the first through holes 441 and the second through holes 451 can be designed into shapes and sizes with different sizes according to the requirement, and in a preferred embodiment, the aperture of the first through holes 441 is larger than or equal to that of the second through holes 451, and the number of the second through holes 451 is larger than that of the first through holes 441, so when the upper porous plate 45 rotates to the coaxial and one-to-one correspondence of the first through holes 441 and the second through holes 451, the radial sizes of gas conveying channels formed by the coaxial first through holes 441 and the coaxial second through holes 451 are the same as those of the second through holes 451, and when the upper porous plate 45 rotates to the second through holes 451 and the first through holes 441 are staggered to enable the first through holes 441 to correspond to two or three second through holes 451, sampling gas is conveyed into the two or three second through holes 451 in a dispersed mode after passing through the first through holes 441, and bubbles formed by the sampling gas are smaller.
In the embodiment provided by the invention, preferably, the radial dimension of the lower porous plate 44 and the upper porous plate 45 is smaller than the cross-sectional dimension of the bottle body 40, when the sealing body 43 is installed on the air outlet 42, the lower porous plate 44 and the upper porous plate 45 are coaxially arranged with the bottle body 40, and annular gaps are arranged between the lower porous plate 44 and the upper porous plate 45 and the bottle body 40, so that the lower porous plate 44 and the upper porous plate 45 are in clearance fit with the bottle body 40, and the installation and the disassembly of the sealing body 43, the lower porous plate 44 and the upper porous plate 45 are convenient.
In another embodiment of the present invention, it is preferable that the connector 5 is disposed between the upper porous plate 45 and the lower porous plate 44, and an upper diversion layer 50, a mixing layer 51 and a lower diversion layer 52 are sequentially disposed in the connector 5 from top to bottom, the upper diversion layer 50 and the lower diversion layer 52 respectively correspond to the upper porous plate 45 and the lower porous plate 44, a plurality of upper diversion holes 501 are disposed on the upper diversion layer 50, a plurality of lower diversion holes 521 are disposed on the lower diversion layer 52, and axes of the upper diversion holes 501 and the lower diversion holes 521 are not located on the same straight line.
Specifically, the connecting body 5 is a cylindrical structure, the upper diversion layer 50 is arranged at the upper part of the connecting body 5, a plurality of upper diversion holes 501 are arranged on the upper diversion layer 50, the plurality of upper diversion holes 501 are sequentially arranged at intervals along the circumferential direction of the connecting body 5 and are correspondingly arranged with the second through holes 451, the lower diversion layer 52 is arranged at the lower part of the connecting body 5, a plurality of lower diversion holes 521 are arranged on the lower diversion layer 52, the plurality of lower diversion holes 521 are sequentially arranged at intervals along the circumferential direction of the connecting body 5 and are correspondingly arranged with the first through holes 441, the mixing layer 51 is positioned between the upper diversion layer 50 and the lower diversion layer 52, a mixing cavity 511 is arranged in the mixing layer 51, each upper diversion hole 501 and each lower diversion hole 521 are communicated with the mixing cavity 511, the lower porous plate 44 is arranged under the connecting body 5 when in installation, each first through hole 521 is correspondingly arranged with the lower diversion holes 521 one by one, the upper porous plate 45 is arranged right above the connecting body 5, and each second through hole 451 corresponds to the upper flow guiding hole 501 one by one, so that the lower porous plate 44, the connecting body 5 and the upper porous plate 45 form a flow guiding structure capable of dispersing and conveying the sampling gas and reducing the speed of the sampling gas, after the sampling gas is conveyed into the bottle body 40 through the air inlet pipe 41, firstly the sampling gas is firstly absorbed by the absorption liquid below the lower porous plate 44, then the sampling gas is firstly dispersed through the first through hole 441 of the lower porous plate 44 and the lower flow guiding hole 521 to form smaller bubbles, the small bubbles are conveyed into the mixing cavity 511 to be in contact with the absorption liquid for reaction, the absorption liquid is secondarily absorbed by the absorption liquid, then the sampling gas is continuously conveyed upwards into the absorption liquid above the upper porous plate 45 for third absorption by the small bubbles formed by each upper flow guiding hole 501 and the second through hole 451, meanwhile, because the axes of the upper diversion hole 501 and the lower diversion hole 521 are not positioned on the same straight line, the direction of the sampling gas can be changed after the sampling gas passes through the mixing cavity 511, so that the contact time of the sampling gas and the absorption liquid in the mixing cavity 511 is prolonged, and the absorption effect of the absorption liquid on the sampling gas is improved.
In another embodiment provided by the invention, further, an upper connecting cavity 54 is arranged between the upper porous plate 45 and the connecting body 5, a lower connecting cavity 53 is arranged between the lower porous plate 44 and the connecting body 5, a lower annular plate 442 is arranged on the upper surface of the lower porous plate 44, the lower annular plate 442 is fixed on the lower surface of the connecting body 5, the lower connecting cavity 53 is formed by the lower porous plate 44, the lower annular plate 442 and the lower surface of the connecting body 5, similarly, an upper annular plate 452 is arranged on the lower surface of the upper porous plate 45, the upper annular plate 452 is fixed on the upper surface of the connecting body 5, the upper porous plate 45, the upper annular plate 452 and the upper surface of the connecting body 5 form an upper connecting cavity 54, after the sampling gas is conveyed into the bottle body 40 through the air inlet pipe 41, firstly, the absorption liquid below the lower porous plate 44 is dispersed and formed into the lower connecting cavity 53, then the small bubbles and the absorption liquid are in contact and absorbed in the lower connecting cavity 53, then the gas is conveyed into the lower guide hole 521 to the lower guide hole 521, the upper air bubble is continuously formed into the small bubbles, the upper guide hole 511 is formed into the mixed gas is conveyed into the upper air bubble, the upper air bubble is in contact with the upper air bubble forming the upper connecting cavity 511, and the absorption liquid is conveyed into the small bubble forming the upper air bubble forming the upper connecting cavity, and the small bubble forming the upper contact hole is continuously, and the upper air bubble is conveyed into the small bubble forming the upper air hole and the upper air hole is in contact with the small bubble forming the upper hole and the upper hole is then is continuously and the upper absorption hole is contacted with the small bubble.
In another embodiment provided by the present invention, preferably, the axis of the first through hole 441 and the axis of the lower diversion hole 521 are not located on the same straight line, and the second through hole 451 and the upper diversion hole 501 are not located on the same straight line, so that the first through hole 441, the lower diversion hole 521, the upper diversion hole 501 and the second through hole 451 are sequentially staggered, the direction of the gas when being conveyed to the lower diversion hole 521 along the first through hole 441 and the lower connection cavity 53 is changed once, the direction of the gas when being conveyed to the upper diversion hole 501 from the lower diversion hole 521 and the mixing cavity 511 is changed for the second time, the direction of the gas when being conveyed to the upper second through hole 451 from the upper diversion hole 501 and the upper connection cavity 54 is changed for the third time, the residence time of the gas in the lower connection cavity 53, the mixing cavity 511 and the upper connection cavity 54 is changed for improving the contact time of the absorption liquid and the sampling gas.
In another embodiment provided by the invention, preferably, the side walls of the lower connecting cavity 53, the mixing cavity 511 and the upper connecting cavity 54 are provided with the opening 55, the radial dimension of the connecting body 5 is consistent with that of the upper porous plate 45 and the lower porous plate 44, so that the lower porous plate 44, the connecting body 5 and the upper porous plate 45 are in clearance fit with the inner wall of the bottle body 40, namely, a small annular gap is reserved between the lower porous plate 44, the connecting body 5 and the upper porous plate 45 and the inner wall of the bottle body 40, when the sampling gas is conveyed in the bottle body 40, a small amount of gas can be conveyed upwards through the annular gap, the side walls of the lower connecting cavity 53, the mixing cavity 511 and the upper connecting cavity 54 are provided with the opening 55, the opening 55 is communicated with the annular gap, so that part of the gas can be conveyed upwards through the annular gap, the annular gap plays a role of reducing the probability of faults, and when the conventional channels formed by the lower connecting cavity 53, the mixing cavity 511 and the upper connecting cavity 54 are regulated to be weak in passing capability, a large amount of gas can be conveyed directly through the annular gap, so that the gas can be prevented from being damaged by the annular gap, and the safety of the upstream equipment is also caused by the annular gap.
In still another embodiment provided by the present invention, preferably, the connector 5 includes an upper circular connector 56, a lower circular connector 57, and an elastic connection member 58 disposed between the upper circular connector 56 and the lower circular connector 57, an upper flow guiding hole 501 is provided on the upper circular connector 56, a lower flow guiding hole 521 is provided on the lower circular connector 57, such that the upper circular connector 56 forms the upper flow guiding layer 50, the lower circular connector 57 forms the lower flow guiding layer 52, a space between the upper circular connector 56 and the lower circular connector 57 forms the open-type mixed layer 51, the mixed layer 51 communicates with the annular gap, an upper annular plate 452 is fixed on an upper surface of the upper circular connector 56, and a lower annular plate 442 is fixedly connected on a lower surface of the lower circular connector 57, such that the upper porous plate 45, the upper annular plate 452, and the upper surface of the upper circular connector 56 form the upper connection cavity 54, and the lower porous plate 44, the lower annular plate 442, and the lower surface of the lower circular connector 57 form the lower connection cavity 53.
In still another embodiment of the present invention, further, the stirring assembly 6 is disposed on the upper surface of the lower circular connector 57, and is used for stirring the gas and the liquid in the mixed layer 51, the stirring assembly 6 includes a plurality of stirring shafts 61 fixedly disposed on the lower circular connector 57, stirring blades 62 are disposed on the stirring shafts 61, the stirring blades 62 are disposed obliquely toward the lower circular connector 57, and by disposing the plurality of stirring shafts 61 and the plurality of stirring blades 62, the stirring shafts 61 and the stirring blades 62 can stir the absorption liquid and the gas in the mixed layer 51 when the lower circular connector 57 rotates, so as to promote the absorption effect of the absorption liquid on the sampled gas.
In still another embodiment provided by the present invention, preferably, the connection structure 46 includes a fixed shaft 461 and a rotating shaft 462, the fixed shaft 461 is fixedly connected with the sealing body 43, the lower porous plate 44, the connection body 5 and the upper porous plate 45 are all connected to the rotating shaft 462, the rotating shaft 462 is connected to the fixed shaft 461 through the rotating connection structure, the rotating connection structure 46 includes a ring-shaped member 463 and a rotating member 464 which are matched with each other, the ring-shaped member 463 is provided on the fixed shaft 461, the rotating member 464 is fixedly provided on top of the rotating shaft 462, a ring-shaped protrusion is provided on the ring-shaped member 463, a ring-shaped groove is provided on an inner wall of the rotating member 464, and the ring-shaped protrusion is restricted in the ring-shaped groove, so that the rotating member 464 can rotate with respect to the ring-shaped member 463.
In still another embodiment of the present invention, optionally, a plurality of fixing portions 465 are provided on the fixing shaft 461, the plurality of fixing portions 465 are sequentially spaced along the axial direction of the fixing shaft 461, the ring-shaped member 463 is provided with fixing members 466, and the fixing members 466 can be fixed on any fixing portion 465; the fixing part 465 may be a fixing screw hole, the fixing member 466 may be a fixing bolt, the rotating member 464 is a cylindrical structure having a hollow interior and an open upper end, and a cylindrical opening chamber 4641 into which a lower end of the fixing shaft 461 is inserted is formed in the rotating member 464, so that the ring member 463 and the rotating member 464 can move up and down along the fixing shaft 461 in use, thereby adjusting positions of the lower porous plate 44, the connecting body 5 and the upper porous plate 45, in the process, the lower end of the fixing shaft 461 is inserted into the cylindrical opening chamber 4641, and after the ring member 463 is adjusted to a proper position, the fixing member 466 is rotated into the corresponding fixing part 465, thereby fixing the rotating member 464.
In still another embodiment of the present invention, preferably, the rotary driving assembly 7 is further provided on the rotating shaft 462 and is used for driving the rotating shaft 462 to rotate, the rotary driving assembly 7 includes an annular mounting seat 70 and a plurality of fan blades 71 disposed on the annular mounting seat 70, the annular mounting seat 70 is fixedly disposed on the rotating shaft 462, the fan blades 71 are disposed on the annular mounting seat 70, three or more fan blades 71 are sequentially disposed at intervals along the circumferential direction of the annular mounting seat 70, the air outlet portion on the sealing body 43 includes an air outlet hole and an air outlet channel, the air outlet channel is disposed at the center position of the sealing body 43 and is located at the upper portion of the sealing body 43, the air outlet channel is connected with the air suction pump 33 through the air outlet pipe, the air outlet hole is disposed at one side of the sealing body 43 close to the interior of the bottle 40, the air outlet hole is plural, the air outlet holes are communicated with the air outlet channel, so that when the air suction pump 33 is operated, the air suction pump is sucked into the bottle 40 through the air outlet pipe, the air outlet channel and the air outlet hole, the air outlet channel 71 is driven to flow upward in the bottle 462, thereby driving the rotating shaft 462, the air suction shaft 43 is driven to rotate, the air outlet channel is connected to the rotating shaft 43, and the air outlet channel is connected to the lower rotating shaft 57 and the rotating shaft and the stirring layer is connected with the stirring device and the stirring device for stirring and absorbing the air in the stirring layer and the stirring device.
In still another embodiment provided by the present invention, preferably, the upper circular connecting member 56 and the upper porous plate 45 are rotatably connected to the rotating shaft 462, the lower circular connecting member 57 and the lower annular plate 442 of the lower porous plate 44 are fixedly disposed, and the lower circular connecting member 57 and the lower porous plate 44 are both fixedly connected to the rotating shaft 462, so that when the rotating shaft 462 rotates, the lower circular connecting member 57 and the lower porous plate 44 rotate synchronously with the rotating shaft 462, the stirring blades 62 and the stirring shaft 61 stir and mix the absorbing liquid and the sampling gas in the mixing chamber 511, the upper circular connecting member 56 and the upper annular plate 452 of the upper porous plate 45 are fixedly connected, the upper circular connecting member 56 and the upper porous plate 45 are both rotatably connected to the rotating shaft 462, but the upper circular connecting member 56 and the upper porous plate 45 cannot move in the axial direction of the rotating shaft 462, and simultaneously, the annular or arc friction strips are disposed on the inner walls of the upper circular connecting member 56 and the upper porous plate 45, so that when the rotating shaft 462 rotates, the rotating shaft 462 provides a circumferential friction driving force to the annular or arc friction strips, so that the upper circular connecting member 56 and the upper porous plate 45 rotate below the rotating shaft 462, and the upper circular connecting member 56 are prevented from rotating up to rotate.
In still another embodiment of the present invention, preferably, the outer sidewall of the upper circular connecting member 56 is provided with a plurality of elastic bodies 561, the plurality of elastic bodies 561 are sequentially spaced along the circumference of the upper circular connecting member 56, and when the sealing body 43 is installed on the bottle body 40, the elastic bodies 561 are contacted with the inner wall of the bottle body 40, so that when the rotating shaft 462 rotates, the inner wall of the bottle body 40 generates a resistance to the elastic bodies 561, which is smaller than the circumferential friction driving force provided by the rotating shaft 462 to the annular or arc friction strip, so that the upper circular connecting body 5 and the upper porous plate 45 both rotate along with the rotating shaft 462, but the rotation speed is lower than the rotation speed of the rotating shaft 462, and thus the upper circular connecting body 5 and the upper porous plate 45 play a role of separation in the bottle body 40, and particularly, the absorption liquid below the upper circular connecting body 5 is stirred and flows in the mixing cavity 511, and the absorption liquid above the upper porous plate 45 is not flowing, thereby not only preventing the liquid from shaking, but also improving the absorption effect of the absorption liquid to the sampling gas.
In still another embodiment provided by the present invention, preferably, a vertical plate 562 is provided on the upper porous plate 45, the vertical plate 562 includes two connected arc plates, the two arc plates form an L shape, the vertical plate 562 is provided with two functions, one of which is that when the rotation shaft 462 rotates, the absorption liquid has a rotation resistance to the vertical plate 562, and the rotation resistance cooperates with the resistance of the inner wall of the bottle body 40 to the elastic body 561, so that the upper porous plate 45 and the upper circular connector 5 rotate at a lower speed than the lower circular connector 57 and the lower porous plate 44, and in the actual use, the upper porous plate 45 and the upper circular connector 5 are in a low-speed rotation state with a lower rotation speed than the lower circular connector 57, and a larger rotation speed difference is formed between the upper circular connector 56 and the lower circular connector 57; secondly, a part of the vertical plate 562 is positioned in the liquid, and a part of the vertical plate 562 extends out of the liquid, so that after the gas passes through the absorption liquid, the vertical plate 562 can play a role in guiding the gas, and therefore the gas can be just conveyed to the fan blade 71, and the driving effect of the flowing gas on the fan blade 71 is improved.
In still another embodiment provided by the present invention, preferably, the elastic connection member 58 between the upper circular connection member 56 and the lower circular connection member 57 is a spring member, the spring member is fixed on the upper circular connection member 56, the lower end of the spring member is not fixed with the lower circular connection member 57, the upper porous plate 45 is provided with a fixed ratchet 72, the upper side surface of the fixed ratchet 72 is circumferentially provided with a plurality of inclined teeth 721, an arc tooth slot 722 is formed between the inclined teeth 721 and the inclined teeth 721, a driving ratchet 73 is arranged on the rotating shaft 462, the structure of the driving ratchet 73 is the same as that of the fixed ratchet 72, but the installation direction is opposite to that of the fixed ratchet 72, the inclined teeth 721 of the driving ratchet 73 correspond to the arc tooth slot 722 of the fixed ratchet 72, the upper porous plate 45 and the upper circular connection member 56 are movably sleeved on the rotating shaft 462, that is, the upper porous plate 45 and the upper circular connection member 56 can rotate along the circumferential direction of the rotating shaft 462, and is capable of moving up and down along the axial direction of the rotating shaft 462, in the initial state, the lower end of the spring member contacts with the lower circular connecting member 57, the inclined teeth 721 of the driving ratchet wheel 73 correspond to the arc-shaped tooth grooves 722 of the fixed ratchet wheel 72, so that in the axial movement stroke of the upper porous plate 45 and the upper circular connecting member 56 along the axial direction thereof, the lower circular connecting member 57 restricts the downward movement of the axial movement stroke by blocking the spring member, while the driving ratchet wheel 73 restricts the upward movement of the axial movement stroke by blocking the fixed ratchet wheel 72, when the rotating shaft 462 is driven to rotate, the driving ratchet wheel 73 rotates synchronously with the rotating shaft 462, while the upper porous plate 45 is blocked from rotating or rotates at a low speed under the rotation resistance of the vertical plate 562 and the resistance of the inner wall of the bottle body 40 to the elastic body 561, so that the rotation speeds of the fixed ratchet wheel 72 and the driving ratchet wheel 73 are different, the driving ratchet wheel 73 moves relative to the fixed ratchet wheel 72, the inclined teeth 721 of the driving ratchet wheel 73 leave the arc tooth grooves 722 of the fixed ratchet wheel 72 so as to press the fixed ratchet wheel 72, the upper porous plate 45 and the upper circular connecting piece 56 downwards to move by a small extent, in the process, the spring piece is pressed and elastic, when the inclined teeth 721 of the driving ratchet wheel 73 rotate to the corresponding positions of the arc tooth grooves 722 of the fixed ratchet wheel 72, the upper porous plate 45 and the upper circular connecting piece 56 upwards to restore to the initial state under the elastic force of the spring piece, and the upper porous plate 45 and the upper circular connecting piece 56 do reciprocating in the bottle body 40, so that the liquid and the sampling gas are driven to move downwards, the liquid and the sampling gas are mutually matched with the stirring assembly 6, the retention time of the sampling gas in the absorption liquid is prolonged, and the absorption liquid can absorb the sampling gas well.
In still another embodiment provided by the present invention, preferably, the fixed ratchet 72 and the driving ratchet 73 cooperate with each other to enable the upper perforated plate 45 and the upper circular connecting body 5 to rotate at a lower speed than the lower circular connecting member 57 and the lower perforated plate 44, and the specific working principle is that, when the rotating shaft 462 is driven to rotate, the lower circular connecting member 57 and the lower perforated plate 44 rotate synchronously with the rotating shaft 462, the driving ratchet 73 rotates with the rotating shaft 462, during which the inclined teeth 721 of the driving ratchet 73 move from one arc-shaped tooth slot 722 of the fixed ratchet 72 into the other arc-shaped tooth slot 722, and for convenience of description, the moving process can be divided into two moving states: the first state is that the inclined teeth 721 of the driving ratchet wheel 73 are at least partially located inside the arc-shaped tooth grooves 722 of the fixed ratchet wheel 72, the second state is that the inclined teeth 721 of the driving ratchet wheel 73 are completely separated from the arc-shaped tooth grooves 722 of the fixed ratchet wheel 72 (shorter between the processes), in the first state, when the inclined teeth 721 of the driving ratchet wheel 73 are gradually separated from the arc-shaped tooth grooves 722 of the fixed ratchet wheel 72, the inclined teeth 721 of the driving ratchet wheel 73 provide a rotation driving force to the fixed ratchet wheel 72, the rotation driving force can enable the upper porous plate 45 and the upper circular connecting body 5 to rotate against the rotation resistance, in the second state, the rotation driving force of the driving ratchet wheel 73 to the fixed ratchet wheel 72 is reduced, the rotation speed of the upper porous plate 45 and the upper circular connecting body 5 is reduced under the rotation resistance of the elastic body 561 and the vertical plate 562 until the inclined teeth 721 of the driving ratchet wheel 73 enter the next arc-shaped tooth groove 722 of the fixed ratchet wheel 72, and the circulation is performed, so that the upper porous plate 45 and the upper circular connecting body 5 are subjected to the changed rotation driving force keeps smaller than the speed of the lower circular connecting body 57 and the lower 44 to rotate at a low speed, and the speed of the upper porous plate 45 can also enter the annular gap through the dynamic adjustment gas conveying channel, and the constant flow rate adjustment can be adjusted through the annular gap.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (7)
1. The constant temperature constant current atmospheric sampling device comprises a sampling box and an air channel collecting mechanism arranged on the sampling box, wherein a constant temperature control unit and an air flow control unit are arranged in the sampling box;
the porous sieve plate absorption bottle comprises a bottle body, an air inlet pipe is arranged at the bottom of the bottle body, an air outlet is formed by opening the top of the bottle body, a sealing body is detachably connected to the air outlet, the lower porous plate and the upper porous plate are connected with the sealing body through connecting pieces, an air outlet part is arranged on the sealing body, the air outlet part is connected with an air extracting pump through an air outlet pipe, and a connecting structure is arranged on the sealing body and comprises a fixed shaft and a rotating shaft;
the rotary driving assembly comprises an annular mounting seat and fan blades arranged on the annular mounting seat, the annular mounting seat is fixedly arranged on the rotary shaft, the fan blades are arranged on the annular mounting seat, the fan blades are sequentially arranged at intervals along the circumferential direction of the annular mounting seat, an air outlet part on the sealing body comprises an air outlet hole and an air outlet channel, the air outlet channel is arranged at the central position of the sealing body and is positioned at the upper part of the sealing body, the air outlet channel is connected with the air suction pump through an air outlet pipe, the air outlet hole is arranged at one side of the sealing body close to the interior of the bottle body, and a plurality of air outlet holes are communicated with the air outlet channel;
The device comprises a porous plate, a connecting body, a mixing layer, a lower flow guiding layer, a water inlet and a water outlet, wherein the connecting body is arranged between the upper porous plate and the lower porous plate, the upper flow guiding layer, the mixing layer and the lower flow guiding layer are sequentially arranged in the connecting body from top to bottom, and the upper flow guiding layer and the lower flow guiding layer respectively correspond to the upper porous plate and the lower porous plate; the connector comprises an upper circular connecting piece, a lower circular connecting piece and an elastic connecting part arranged between the upper circular connecting piece and the lower circular connecting piece, wherein an upper diversion hole is formed in the upper circular connecting piece, a lower diversion hole is formed in the lower circular connecting piece, an upper diversion layer is formed on the upper circular connecting piece, a lower diversion layer is formed on the lower circular connecting piece, the upper circular connecting piece and an upper porous plate are rotationally connected with a rotating shaft, the lower circular connecting piece and a lower annular plate of the lower porous plate are fixedly arranged, the lower circular connecting piece and the lower porous plate are fixedly connected with the rotating shaft, when the rotating shaft rotates, the lower circular connecting piece and the lower porous plate synchronously rotate along with the rotating shaft, the connector further comprises a stirring assembly which is arranged on the upper surface of the lower circular connecting piece and used for stirring gas and liquid in the mixing layer, the stirring assembly comprises a plurality of stirring shafts fixedly arranged on the lower circular connecting piece, stirring blades are arranged on the stirring shafts, the stirring blades are obliquely arranged towards the lower circular connecting piece, through the arrangement of the stirring shafts and the stirring blades, the stirring blades and the stirring shafts stir and mix absorption liquid and sampling gas in a mixing cavity, the upper circular connecting piece is fixedly connected with an upper annular plate of an upper porous plate, the upper circular connecting piece is rotationally connected with the upper porous plate on a rotating shaft, but the upper circular connecting piece and the upper porous plate cannot move along the axial direction of the rotating shaft, annular or arc friction strips are arranged on the inner walls of the upper circular connecting piece and the upper porous plate and are in friction contact with the inner wall of the rotating shaft, when the rotating shaft rotates, the rotating shaft provides a circumferential friction driving force for the annular or arc friction strips, so that the upper circular connector and the upper porous plate rotate with a rotation lower than the rotation shaft;
The elastic bodies are arranged on the outer side wall of the upper circular connecting piece, the elastic bodies are arranged in a plurality of mode, the elastic bodies are sequentially arranged at intervals along the circumferential direction of the upper circular connecting piece, after the sealing body is arranged on the bottle body, the elastic bodies are in contact with the inner wall of the bottle body, when the rotating shaft rotates, the inner wall of the bottle body generates resistance to the elastic bodies, the resistance is smaller than circumferential friction driving force provided by the rotating shaft to the annular or arc friction strips, therefore the upper circular connecting piece and the upper porous plate can rotate along with the rotating shaft, the rotating speed of the upper porous plate is lower than that of the rotating shaft, the upper circular connecting piece and the upper porous plate play a separating role in the bottle body, absorption liquid below the upper circular connecting piece is stirred and flows, absorption liquid above the upper porous plate does not flow, the upper porous plate is provided with a vertical plate, the vertical plate comprises two arc plates which are connected, and the two arc plates form an L shape.
2. The constant temperature, constant current, atmosphere sampling device according to claim 1, wherein the aperture of the first through hole is greater than or equal to the aperture of the second through hole.
3. The constant temperature, constant flow atmospheric sampling device of claim 1, wherein the radial dimensions of the lower porous plate and upper porous plate are smaller than the cross-sectional dimensions of the bottle.
4. The constant temperature and constant current atmospheric sampling device according to claim 1, wherein a plurality of upper diversion holes are formed in the upper diversion layer, and a plurality of lower diversion holes are formed in the lower diversion layer.
5. The constant temperature and constant flow atmospheric sampling device according to claim 4, wherein a lower connecting cavity is arranged between the lower porous plate and the connecting body.
6. The constant temperature and constant flow atmospheric sampling device according to claim 5, wherein an upper connecting cavity is arranged between the upper porous plate and the connecting body.
7. The constant temperature and constant flow atmospheric sampling device according to claim 6, wherein openings are provided on sidewalls of the lower connection chamber, the mixing chamber and the upper connection chamber.
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| CN202310707626.5A CN116539380B (en) | 2023-06-15 | 2023-06-15 | Constant temperature constant current atmospheric sampling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310707626.5A CN116539380B (en) | 2023-06-15 | 2023-06-15 | Constant temperature constant current atmospheric sampling device |
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| CN116539380A CN116539380A (en) | 2023-08-04 |
| CN116539380B true CN116539380B (en) | 2024-04-19 |
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| WO2012114458A1 (en) * | 2011-02-22 | 2012-08-30 | 株式会社日立製作所 | Device for capturing microorganisms or like in atmosphere and method for capturing same |
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| US6786105B1 (en) * | 2001-10-09 | 2004-09-07 | University Of Southern California | Personal particle monitor |
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| CN202204709U (en) * | 2011-06-16 | 2012-04-25 | 深圳国技仪器有限公司 | Full-automatic multi-channel gas path switching atmospheric sampling device |
| CN212031073U (en) * | 2020-04-27 | 2020-11-27 | 四川中资时代科技有限公司 | Device for sampling atmospheric molecular pollutants |
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| CN116539380A (en) | 2023-08-04 |
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