CN212586197U - Dust detector based on piezoelectric quartz crystal microbalance - Google Patents
Dust detector based on piezoelectric quartz crystal microbalance Download PDFInfo
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- CN212586197U CN212586197U CN202021408972.1U CN202021408972U CN212586197U CN 212586197 U CN212586197 U CN 212586197U CN 202021408972 U CN202021408972 U CN 202021408972U CN 212586197 U CN212586197 U CN 212586197U
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Abstract
A dust detector based on a piezoelectric quartz crystal microbalance comprises a particulate matter sampler and a detection device, wherein the detection device comprises a quartz crystal microbalance and a base, a mounting opening is formed in the central position of the upper end of the base, the quartz crystal microbalance is fixedly connected to the inner side of the mounting opening, a detection circuit is connected to two stages of the quartz crystal microbalance, a shell is fixedly connected to the upper end of the base, a guide part is fixedly connected to the inner side of the shell, a channel hole is formed in the left end of the inner side of the guide part, a mounting hole formed in the shell is connected to the left side of the channel hole, the mounting hole is connected with the output end of the particulate matter sampler through a pipeline, an ionization tube fixedly connected to the lower end of the channel hole is arranged in the central position of the lower end of the guide part, the ionization tube is located right above the quartz crystal microbalance, the air outlet pipe is hermetically connected with an air suction end of an air suction pump.
Description
Technical Field
The utility model relates to a dust check out test set especially relates to a dust detector based on piezoelectric quartz crystal microbalance.
Background
PM2.5 detection becomes an important task of air quality detection in China. The current air dust detection method mainly takes detection instruments of a vibration balance method and a beta ray method as main components. Meanwhile, there are many problems in the use process: the core technologies of the oscillating balance method and the beta ray method are owned by international large-brand manufacturers, and domestic manufacturers mainly copy; and secondly, the two detection instruments have the problems of complex use, high failure rate, large maintenance workload and the like.
In addition to the above two methods, the dust detection method is also an optical scattering method and a piezoelectric quartz crystal microbalance method. The laser scattering method is basically used in dust emission early warning occasions due to poor detection precision. The piezoelectric quartz crystal microbalance method is a new technology and has the characteristics of simple use and small maintenance workload.
Disclosure of Invention
The utility model discloses solve the problem that above-mentioned prior art exists, provide a dust detector based on piezoelectric quartz crystal microbalance, the device structural design is reasonable, convenient to use, and the piezoelectricity resonance phenomenon through quartz crystal microbalance detects the particle content in the air that awaits measuring, has higher detection precision.
The utility model provides a technical scheme that its technical problem adopted: the dust detector based on the piezoelectric quartz crystal microbalance comprises a particle sampler and a detection device connected with the particle sampler through a pipeline, wherein the detection device comprises a quartz crystal microbalance and a base, a mounting opening is formed in the center of the upper end of the base, the quartz crystal microbalance is fixedly connected to the inner side of the mounting opening, a detection circuit is connected to two stages of the quartz crystal microbalance, a shell is fixedly connected to the upper end of the base, a guide part is fixedly connected to the inner side of the shell, a channel hole is formed in the left end of the inner side of the guide part, a mounting hole formed in the shell is connected to the left side of the channel hole, the mounting hole is connected with the output end of the particle sampler through a pipeline, an ionization tube fixedly connected to the lower end of the guide part is arranged in the center of the lower end of the channel hole, and is located right above, discharge electrodes are arranged at the left end and the right end of the inner side of the ionization tube, an air outlet hole formed in the shell is formed in the right end of the ionization tube, an air outlet pipe is fixedly connected into the air outlet hole, the air outlet pipe is hermetically connected with an air suction end of an air suction pump, air to be detected collected by the particulate matter sampler is blown to the quartz crystal microbalance through the guide portion and is adsorbed on the surface of the quartz crystal microbalance, and the dust particle content of the air to be detected in the corresponding size is detected through the crystal oscillation frequency change of the quartz crystal microbalance, so that the detection precision is high, and the detection.
In order to further improve the technical scheme, the particulate matter sampler comprises a cylinder body, a partition plate is hermetically connected to the inner side of the upper end of the cylinder body, a plurality of first channel pipes which are uniformly arranged are fixedly connected to the inner side of the upper end of the cylinder body, a second channel pipe which is fixedly connected to the inner side of the upper end of the partition plate is arranged between the plurality of first channel pipes, a filter layer is fixedly connected to the inner side of the middle end of the cylinder body, a collecting funnel which is positioned in the cylinder body is arranged on the outer side of the lower end of the filter layer, the lower end of the collecting funnel is hermetically connected with one end of a first connecting pipe, the other end of the first connecting pipe is hermetically connected with the left end of a rotary shell, a rotating blade which is driven by a motor is arranged on the inner side of the rotary shell, one end of a second, be equipped with the particulate matter sample thief that has the filter layer for the air that gets into the particulate matter sample thief filters through the filter layer earlier, filters the large granule thing that the diameter is greater than the particle diameter that awaits measuring, in the air admission rotatory casing after the filtration, the effect utilizes the inertia of big particulate matter and little particulate matter or the different principle of centrifugal force, the small particle thing that the aerodynamic diameter is less than the particle diameter that awaits measuring will be held back in rotatory casing under the effect of centrifugal force, and the particle that awaits measuring then can blow out from the barrel through the second connecting pipe under the effect of centrifugal force.
Further perfect, be equipped with heating device between particulate matter sample thief and the detection device, the heating device left end be equipped with second connecting pipe sealing connection's third connecting pipe, the heating device right-hand member be equipped with the fourth connecting pipe that the mounting hole is connected, heating device includes the heating pipe, heating pipe sealing connection be in between third connecting pipe and the fourth connecting pipe, the heating pipe outside fixedly connected with zone of heating, the zone of heating inboard is equipped with the electric heating wire of winding in the heating pipe outside, the inboard fixedly connected with temperature sensor of fourth connecting pipe is equipped with heating device and temperature sensor for the temperature that blows in detection device wait to detect the air keeps invariable, avoids the change of air temperature to cause the influence to the testing result of quartz crystal microbalance.
Further perfect, the zone of heating outside is equipped with fixed connection and is in protective housing on the heating pipe, it has thermal-insulated cotton to keep warm to fill between protective housing and the zone of heating, is equipped with protective housing and thermal-insulated cotton, reduces thermal scattering and disappearing, and the energy saving more just avoids the protective housing to send out to scald, and the security when using is better.
Further perfecting, collecting the funnel lower extreme and being equipped with the installation flow sensor on the first connecting pipe, rotatory casing right-hand member upside is equipped with the installation flow controller on the second connecting pipe is equipped with flow sensor and flow controller, monitors current velocity of flow in real time to according to setting for the output of flow value dynamic adjustment flow controller, thereby realize the dynamic stability of velocity of flow, make the device's testing result more accurate.
Further perfect, the bracing piece that barrel upper end fixedly connected with a plurality of evenly set up, upper end fixedly connected with of bracing piece shelters from the lid, is equipped with and shelters from the lid, avoids in the large granule material in the air falls into the barrel, influences the accuracy of testing result.
The utility model discloses profitable effect is: the utility model has the advantages of reasonable design, high durability and convenient use, through the guide part with the particulate matter sample thief collection wait to detect the air and blow to quartz crystal microbalance and adsorb at quartz crystal microbalance surface, the crystal oscillation frequency through quartz crystal microbalance changes the dust particle content of the corresponding size that detects in the air that awaits measuring, makes and detects the precision high, has higher detection precision, controls the temperature and the flow that let in the testing gas through heating device and flow sensor, makes the more accuracy of testing result.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: 1. the particle sampler comprises a particle sampler, 2, a quartz crystal microbalance, 3, a base, 4, an installation port, 5, a measurement circuit, 6, a shell, 7, a guide part, 8, a channel hole, 9, an installation hole, 10, an ionization tube, 11, a discharge electrode, 12, an air outlet hole, 13, an air outlet pipe, 14, an air pump, 15, a cylinder, 16, a partition plate, 17, a first channel pipe, 18, a second channel pipe, 19, a filter layer, 20, a collection funnel, 21, a first connecting pipe, 22, a rotary shell, 23, a rotary blade, 24, a second connecting pipe, 25, a third connecting pipe, 26, a fourth connecting pipe, 27, a heating pipe, 28, a heating layer, 29, an electric heating wire, 30, a temperature sensor, 31, a protective shell, 32, heat insulation cotton, 33, a flow sensor, 34, a flow controller, 35, a support rod, 36 and a shielding cover.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
with reference to the accompanying drawings: in the embodiment, the dust detector based on the piezoelectric quartz crystal microbalance comprises a particulate matter sampler 1 and a detection device connected with the particulate matter sampler 1 through a pipeline, wherein the detection device comprises a quartz crystal microbalance 2 and a base 3, a mounting port 4 is formed in the central position of the upper end of the base 3, the quartz crystal microbalance 2 is fixedly connected to the inner side of the mounting port 4, two stages of the quartz crystal microbalance 2 are connected with a detection circuit 5, the upper end of the base 3 is fixedly connected with a shell 6, the inner side of the shell 6 is fixedly connected with a guide part 7, the left end of the inner side of the guide part 7 is provided with a channel hole 8, the left side of the channel hole 8 is connected with a mounting hole 9 formed in the shell 6, the mounting hole 9 is connected with the output end of the particulate matter sampler 1 through a pipeline, and an ionization tube 10 fixedly connected to the lower end of the guide part 7, ionization tube 10 is located directly over quartz crystal microbalance 2, both ends are equipped with discharge electrode 11 about ionization tube 10 inboard, ionization tube 10 right-hand member is equipped with and opens venthole 12 on the casing 6, fixedly connected with outlet duct 13 in the venthole 12, outlet duct 13 sealing connection has the induction end of aspiration pump 14, blows to the quartz crystal microbalance and adsorbs on the quartz crystal microbalance surface with the air to be detected that the particulate matter sample thief was gathered through the guide part, detects the dust particle content of corresponding size in the air to be detected through the crystal oscillation frequency change of quartz crystal microbalance for detect the precision height, the testing result is accurate.
The particulate matter sampler 1 comprises a cylinder body 15, a partition plate 16 is hermetically connected to the inner side of the upper end of the cylinder body 15, a plurality of first channel pipes 17 which are uniformly arranged are fixedly connected to the inner side of the upper end of the cylinder body 15, a plurality of second channel pipes 18 which are fixedly connected to the inner side of the upper end of the partition plate 16 are arranged between the first channel pipes 17, a filter layer 19 is fixedly connected to the inner side of the middle end of the cylinder body 15, a collecting funnel 20 which is positioned in the cylinder body is arranged on the outer side of the lower end of the filter layer 19, one end of a first connecting pipe 21 is hermetically connected to the lower end of the collecting funnel 20, the other end of the first connecting pipe 21 is hermetically connected to the left end of a rotating shell 22, a rotating blade 23 which is driven by a motor is arranged on the inner side of the rotating shell 22, one end of a, second connecting pipe 24 passes through the pipeline and is connected with mounting hole 9, be equipped with the particulate matter sample thief that has the filter layer, make the air that gets into the particulate matter sample thief filter through the filter layer earlier, it filters the large granule thing that the diameter is greater than the particle diameter that awaits measuring, the air admission after the filtration is in rotatory casing, the effect is the principle that the inertia or the centrifugal force that utilizes big particulate matter and little particulate matter are different, the small granule thing that the aerodynamic diameter is less than the particle diameter that awaits measuring will be held back in rotatory casing under the effect of centrifugal force, and the particle that awaits measuring then can blow out through the second connecting pipe in following the.
Be equipped with heating device between particulate matter sample thief 1 and the detection device, the heating device left end be equipped with 24 sealing connection's of second connecting pipe third connecting pipe 25, the heating device right-hand member be equipped with fourth connecting pipe 26 that mounting hole 9 is connected, heating device includes heating pipe 27, heating pipe 27 sealing connection be in between third connecting pipe 25 and the fourth connecting pipe 26, heating pipe 27 outside fixedly connected with zone of heating 28, zone of heating 28 inboard is equipped with the electric heating wire 29 of winding in the heating pipe 27 outside, the inboard fixedly connected with temperature sensor 30 of fourth connecting pipe 26 is equipped with heating device and temperature sensor for blow in detection device's the temperature that waits to detect the air and keep invariable, avoid the change of air temperature to cause the influence to the testing result of quartz crystal microbalance.
The zone of heating 28 outside is equipped with fixed connection and is in protective housing 31 on the heating pipe 27, it has thermal-insulated cotton 32 to fill between protective housing 31 and the zone of heating 28, is equipped with protective housing and thermal-insulated cotton, reduces thermal scattering and disappearing, and the energy saving more just avoids the protective housing to send out to scald, and the security when using is better.
The lower end of the collecting funnel 20 is provided with a flow sensor 33 installed on the first connecting pipe 21, the upper side of the right end of the rotating shell 22 is provided with a flow controller 34 installed on the second connecting pipe 24, the current flow rate and the current flow rate are monitored in real time, and the output of the flow controller is dynamically adjusted according to a set flow rate value, so that the dynamic stability of the flow rate is realized, and the detection result of the device is more accurate.
The bracing piece 35 that a plurality of evenly set up is fixedly connected with in barrel 15 upper end, bracing piece 35 upper end fixedly connected with shelters from lid 36, is equipped with and shelters from the lid, avoids in the large granule material in the air falls into the barrel, influences the accuracy of testing result.
The utility model discloses use is, inhale the air that will await measuring through particulate matter sample thief 1, the air that awaits measuring is greater than and is less than the particulate matter screening that awaits measuring with the diameter behind the centrifugal action of filter layer 19 and rotating vane 23, the air that has the particulate matter that awaits measuring gets into detection device from fourth connecting pipe 26 after the heating of third connecting pipe 25 through heating device, the particulate matter that will await measuring is taken to 2 upper ends of quartz crystal microbalance behind the guide effect through the via hole 8 that awaits measuring, thereby make 2 upper end absorbent material quality of quartz crystal microbalance increase, thereby the oscillation frequency through the quartz crystal microbalance changes and obtains the content of the particulate matter that awaits measuring in the air.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.
Claims (6)
1. The utility model provides a dust detector based on piezoelectricity quartz crystal microbalance, includes particulate matter sample thief (1) and the detection device who is connected with particulate matter sample thief (1) through the pipeline, detection device includes quartz crystal microbalance (2) and base (3), characterized by: the device is characterized in that a mounting opening (4) is formed in the center of the upper end of the base (3), a quartz crystal microbalance (2) is fixedly connected to the inner side of the mounting opening (4), two stages of the quartz crystal microbalance (2) are connected with a detection circuit (5), a shell (6) is fixedly connected to the upper end of the base (3), a guide part (7) is fixedly connected to the inner side of the shell (6), a channel hole (8) is formed in the left end of the inner side of the guide part (7), a mounting hole (9) formed in the shell (6) is connected to the left side of the channel hole (8), the mounting hole (9) is connected with the output end of the particulate matter sampler (1) through a pipeline, an ionization tube (10) fixedly connected to the lower end of the guide part (7) is arranged in the center of the lower end of the channel hole (8), and the ionization tube (10), discharge electrodes (11) are arranged at the left end and the right end of the inner side of the ionization tube (10), an air outlet hole (12) formed in the shell (6) is formed in the right end of the ionization tube (10), an air outlet pipe (13) is fixedly connected in the air outlet hole (12), and the air outlet pipe (13) is connected with an air suction end of an air suction pump (14) in a sealing mode.
2. The dust detector based on the piezoelectric quartz crystal microbalance of claim 1, which is characterized in that: the particle sampler (1) comprises a cylinder body (15), a partition plate (16) is hermetically connected to the inner side of the upper end of the cylinder body (15), a plurality of first channel pipes (17) are fixedly connected to the inner side of the upper end of the cylinder body (15) and are uniformly arranged, a plurality of second channel pipes (18) are fixedly connected to the inner side of the upper end of the partition plate (16) and are arranged between the first channel pipes (17), a filter layer (19) is fixedly connected to the inner side of the middle end of the cylinder body (15), a collecting funnel (20) positioned in the cylinder body is arranged on the outer side of the lower end of the filter layer (19), one end of a first connecting pipe (21) is hermetically connected to the lower end of the collecting funnel (20), the other end of the first connecting pipe (21) is hermetically connected to the left end of a rotary shell (22), a rotary blade (23) driven by a motor is arranged on the inner side of the rotary shell (, the other end of the second connecting pipe (24) is fixedly connected to the inner side of the right end of the cylinder body (15), and the second connecting pipe (24) is connected with the mounting hole (9) through a pipeline.
3. The dust detector based on the piezoelectric quartz crystal microbalance of claim 2, which is characterized in that: be equipped with heating device between particulate matter sample thief (1) and the detection device, the heating device left end be equipped with second connecting pipe (24) sealing connection's third connecting pipe (25), the heating device right-hand member be equipped with fourth connecting pipe (26) that mounting hole (9) are connected, heating device includes heating pipe (27), heating pipe (27) sealing connection be in between third connecting pipe (25) and fourth connecting pipe (26), heating pipe (27) outside fixedly connected with zone of heating (28), zone of heating (28) inboard is equipped with electric heating wire (29) of winding in heating pipe (27) outside, the inboard fixedly connected with temperature sensor (30) of fourth connecting pipe (26).
4. The dust detector based on the piezoelectric quartz crystal microbalance of claim 3, which is characterized in that: the heating layer (28) outside is equipped with fixed connection and is in protective housing (31) on heating pipe (27), it has thermal-insulated cotton (32) to fill between protective housing (31) and heating layer (28).
5. The dust detector based on the piezoelectric quartz crystal microbalance of claim 2, which is characterized in that: the lower end of the collecting funnel (20) is provided with a flow sensor (33) installed on the first connecting pipe (21), and the upper side of the right end of the rotating shell (22) is provided with a flow controller (34) installed on the second connecting pipe (24).
6. The dust detector based on the piezoelectric quartz crystal microbalance of claim 2, which is characterized in that: the upper end of the barrel body (15) is fixedly connected with a plurality of supporting rods (35) which are uniformly arranged, and the upper end of each supporting rod (35) is fixedly connected with a shielding cover (36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021408972.1U CN212586197U (en) | 2020-07-16 | 2020-07-16 | Dust detector based on piezoelectric quartz crystal microbalance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021408972.1U CN212586197U (en) | 2020-07-16 | 2020-07-16 | Dust detector based on piezoelectric quartz crystal microbalance |
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| Publication Number | Publication Date |
|---|---|
| CN212586197U true CN212586197U (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021408972.1U Active CN212586197U (en) | 2020-07-16 | 2020-07-16 | Dust detector based on piezoelectric quartz crystal microbalance |
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|---|---|
| CN (1) | CN212586197U (en) |
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- 2020-07-16 CN CN202021408972.1U patent/CN212586197U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230410 Address after: Room 118, Building 2, No. 388 Tongyun Street, Liangzhu Street, Yuhang District, Hangzhou City, Zhejiang Province, 311100 Patentee after: Hongwei Electromechanical (Hangzhou) Co.,Ltd. Address before: Hangzhou City, Zhejiang province Binjiang District 310053 shore road 528 Patentee before: ZHEJIANG INSTITUTE OF MECHANICAL & ELECTRICAL ENGINEERING |
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| TR01 | Transfer of patent right |