CN207738156U - A kind of transfer assembly and particle concentration detection device - Google Patents
A kind of transfer assembly and particle concentration detection device Download PDFInfo
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- CN207738156U CN207738156U CN201721924736.3U CN201721924736U CN207738156U CN 207738156 U CN207738156 U CN 207738156U CN 201721924736 U CN201721924736 U CN 201721924736U CN 207738156 U CN207738156 U CN 207738156U
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- 238000001514 detection method Methods 0.000 title claims abstract description 90
- 239000002245 particle Substances 0.000 title claims abstract description 43
- 238000012546 transfer Methods 0.000 title claims abstract description 35
- 239000012528 membrane Substances 0.000 claims abstract description 156
- 230000007246 mechanism Effects 0.000 claims abstract description 96
- 230000005250 beta ray Effects 0.000 claims description 30
- 238000012360 testing method Methods 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 19
- 239000013618 particulate matter Substances 0.000 claims description 13
- 238000001917 fluorescence detection Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 6
- 230000008450 motivation Effects 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 239000000523 sample Substances 0.000 description 45
- 238000010586 diagram Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000032258 transport Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012496 blank sample Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a kind of transfer assembly and particle concentration detection device,It is round-trip for transporting filter membrane,It includes one for furling the first paper tape mandrel for putting filter membrane,One the first driving mechanism for driving the first paper tape mandrel both forward and reverse directions to rotate,One for furling the second paper tape mandrel for putting filter membrane,One the second driving mechanism for driving the second paper tape mandrel both forward and reverse directions to rotate,One is set between the first paper tape mandrel and the second paper tape mandrel the counter wheel for being used to support filter membrane and back turn pulley group in filter membrane transmitting path,One is correspondingly arranged in the detection device and a control device for detecting the counter wheel rotating cycle at counter wheel,The control device controls the first driving mechanism according to the detection signal of detection device,The running of second driving mechanism,When filter membrane is on the first paper tape mandrel and the second paper tape mandrel is driven to rotate forward for the second driving mechanism,Filter membrane is moved to the direction of the second paper tape mandrel,When detection device detects that counter wheel rotates predetermined amount,Second driving mechanism is stopped.
Description
Technical field
The utility model is related to air detection technical field, relate more specifically to a kind of transfer assembly and particle concentration inspection
Survey device.
Background technology
With the increasing of China's dynamics in terms of prevention and cure of air pollution, grasping various regions environmental seems particularly heavy
It wants, air pollution index is excessively high to cause serious harm, because the pollution of particulates object is detection air pollution index
An important factor for, therefore be very urgent to the detection of ambient particle object concentration.Currently, lot of domestic and international enterprise is penetrated using β
Collimation method on-line checking particulate in air concentration.The test philosophy of β attenuation sensors is β when β rays pass through certain substance
Son is mutually collided with the electronics in particulate matter occurs energy loss, absorbing phenomenon is formed, in air particle concentration on-line checking
When, collect air sample using filter membrane, and blank testing filter membrane and collect the filter membrane β ray particles after sample respectively and pass through journey
Degree is to calculate air particle concentration.If not in filter membrane same position blank testing sample and collecting sample when because of detection,
Then just there is very high requirement to the uniformity coefficient of filter membrane, but currently without the filter membrane of such high evenness, so working as blank and receipts
It is the most accurate to collect sample test data in filter membrane same position, but the regulation of sample is influenced and collected very by β ray characteristics
Difficulty is accomplished in the case of not mobile example, detector or collection device in filter membrane same position to blank sample and after collecting sample
Filter membrane tested.
In consideration of it, it is necessary to provide a kind of accurate back and forth movements of filter membrane that transports to improve particle concentration measuring accuracy
Transfer assembly and particle concentration detection device are to solve drawbacks described above.
Utility model content
The accurate back and forth movement of filter membrane can be transported the technical problem to be solved by the utility model is to provide one kind to improve
The transfer assembly of grain object concentration determination precision.
Another technical problem to be solved in the utility model, which is to provide one kind, can transport the accurate back and forth movement of filter membrane to carry
The particle concentration detection device of high particle concentration measuring accuracy.
In order to solve the above technical problems, one side according to the present utility model, provides a kind of transfer assembly, for transporting filter
Film is round-trip, which includes one for furling the first paper tape mandrel for putting filter membrane, one for driving first paper tape
First driving mechanism of mandrel both forward and reverse directions rotation, one are for furl the second paper tape mandrel for putting filter membrane, one for described in driving
Second driving mechanism of the second paper tape mandrel both forward and reverse directions rotation, one are set to the first paper tape mandrel and the second paper tape mandrel
Between the counter wheel for being used to support filter membrane in filter membrane transmitting path and back turn pulley group, one be correspondingly arranged at the counter wheel and use
In the detection device and a control device that detect the counter wheel rotating cycle, the control device is filled with the detection respectively
Set, the first driving mechanism is connected with the second driving mechanism, according to the detection signal of the detection device control it is described first driving
The running of mechanism, the second driving mechanism, when filter membrane is on the first paper tape mandrel and the second driving mechanism drives the second paper tape
When mandrel rotates forward, filter membrane is moved through counter wheel and back turn pulley group to the direction of the second paper tape mandrel, when detection device detects meter
When number wheel rotation predetermined amount, the second driving mechanism is stopped.
Its further technical solution is：Second driving mechanism is identical as the first driving mechanism structure, and described first drives
Motivation structure includes motor and motor meshed gears, clutch and damper, and the damper is sheathed on the biography in clutch
On moving axis, the clutch is connect by the gear with the motor, and the first paper tape mandrel connects with the transmission shaft
It connects；The back turn pulley group includes the first back turn pulley, the second back turn pulley and third back turn pulley, when filter membrane is wound on the first paper tape core
On axis and when the motor of the second driving mechanism works, the second paper tape mandrel of the second driving mechanism driving is as driving tooth
Wheel, the first paper tape mandrel is as driven gear, and the filter membrane is successively through first back turn pulley, counter wheel, the second rewinding
Wheel and the transmission of third back turn pulley, are moved to the direction of the second paper tape mandrel.
Its further technical solution is：First driving mechanism further includes having paper tape gland, and the paper tape gland is fixed
On the first paper tape mandrel.
In order to solve the above technical problems, another aspect according to the present utility model, provides a kind of particle concentration detection dress
It sets, which includes：It shell, the sample collection device being set on shell and is set to described
Filter membrane, first chamber, Concentration Testing component in shell and transfer assembly, wherein the sample collection device and air communication,
The first chamber is connected to sample collection device, and is equipped with a first through hole in its lower face, and the filter membrane is laid in described
First chamber lower face, the Concentration Testing component are adjacent with the first chamber comprising are respectively arranged at the filter membrane two
The β ray irradiations source of side and β scintillation detectors, the transfer assembly are above-mentioned transfer assembly, and first in the transfer assembly drives
Motivation structure and the second driving mechanism are respectively arranged on the both ends of first chamber and Concentration Testing component, for driving the filter membrane to exist
It is translated between the first chamber and Concentration Testing component.
Its further technical solution is：The particle concentration detection device further includes having seal assembly, the sealing group
Part is located at below the first chamber, which includes second chamber, and third driving mechanism is equipped in it, with driving
Seal assembly moves up and down, which is controlled by the control device, and the second chamber upper surface is equipped with second
Filter membrane is clamped in itself and first chamber by through-hole when being move upwardly until under driving of the seal assembly in third driving mechanism
When between lower face, the filter membrane seals first through hole and the second through-hole, and the air for entering first chamber at this time passes through filter membrane,
Into second chamber, the particulate matter in air is captured by filter membrane.
Its further technical solution is：Second through-hole penetrates through the second chamber, and the sample collection device includes
There are air inlet pipe, escape pipe and asepwirator pump, the air inlet pipe to be connected to air and the first chamber, the escape pipe is connected to
On second through-hole of the second chamber, the asepwirator pump is connect with the escape pipe.
Its further technical solution is：The particle concentration detection device further includes having X-fluorescence detection components, the X
Fluoroscopic examination component is adjacent with the Concentration Testing component, is located at the filter membrane upper end, to detect element species in air and contain
Amount.
Compared with prior art, the utility model can drive filter membrane to move back and forth by transfer assembly, not acquire sample
Before, if filter membrane is on the first paper tape mandrel, the second driving mechanism in transfer assembly is driving the second paper tape mandrel just
Turn, is moved to the direction of the second paper tape mandrel through the counter wheel and back turn pulley group with driving filter membrane to rotate forward i.e. filter membrane, work as detection
When device detects that counter wheel rotating cycle is predetermined amount, control device control second driving is stopped, with detection
The β ray percent of pass of blank filter membrane；Control device drives first driving mechanism to drive filter membrane reversion after detection, works as inspection
When survey device detects that counter wheel rotating cycle is predetermined amount, the first driving mechanism is stopped, and is filtered after blank detection at this time
Film is transmitted to by the β ray irradiations source place of penetrating to make filter membrane capture the particulate matter in air sample at sample collection, and sampling terminates
Control circuit drives the second driving mechanism that filter membrane is driven to rotate forward afterwards, with Beta-ray percent of pass after detection collection sample, according to twice
The Beta-ray percent of pass of detection can calculate the particle concentration of air, it is known that, the utility model passes through the inspection in transfer assembly
The rotating cycle for the counter wheel that device detection is set in filter membrane transmitting path is surveyed to judge the displacement distance of filter membrane, to transport filter
The accurate back and forth movement of film ensure that with the blank testing sample at the same position of filter membrane and the β ray percent of pass after collection sample
Blank detection, air particle are collected and its are detected in filter membrane same position, to improve particle concentration measuring accuracy.
Description of the drawings
Fig. 1 is the structural schematic diagram of the application particle concentration detection device first embodiment.
Fig. 2 be particle concentration detection device shown in Fig. 1 A-A to sectional view.
Fig. 3 is the concrete structure schematic diagram of clutch in the application.
Fig. 4 is the sectional view of the B-B direction of clutch shown in Fig. 3.
Fig. 5 is the structural schematic diagram of the application particle concentration detection device second embodiment.
Fig. 6 is the flow diagram of one specific embodiment of the application particle concentration detection method.
Specific implementation mode
To make those skilled in the art that the purpose of this utility model, technical solution and excellent be more clearly understood
Point is further elaborated the application below in conjunction with drawings and examples.
Referring to figs. 1 to Fig. 4, Fig. 1 to Fig. 4 illustrates a specific embodiment of the application particle concentration detection device 10.
In the embodiment shown in the figures, the particle concentration detection device 10 includes shell 11, the sample being set on shell 11
Collection device and the filter membrane 13 being set in the shell 11, first chamber 14, Concentration Testing component 15, transfer assembly with
And seal assembly 17, the transfer assembly include control device, wherein the sample collection device and air communication, it is described
First chamber 14 is connected to sample collection device, and is equipped with a first through hole in its lower face, and the seal assembly 17 is located at
14 lower section of the first chamber, which includes second chamber 171, and third driving mechanism is equipped in it, to drive
Dynamic sealing assembly 17 moves up and down, and the third driving mechanism is controlled by control device, it is preferable that the second chamber 171 is set
There is the second through-hole of the perforation second chamber 171, the filter membrane 13 is laid in 14 lower face of the first chamber and described close
Between 17 upper surface of sealing assembly, the Concentration Testing component 15 is adjacent with the first chamber 14 comprising is respectively arranged at institute
β ray irradiations source 151 and the β scintillation detectors 152 of 13 both sides of filter membrane are stated, the transfer assembly is for driving the filter membrane 13 to exist
It is translated between the first chamber 14 and Concentration Testing component 15.When under driving of the seal assembly 17 in third driving mechanism
It is move upwardly until when filter membrane 13 is clamped in it between 14 lower face of first chamber, the filter membrane 13 is by first through hole and
Two through-holes seal simultaneously, and the air for entering first chamber 14 at this time passes through filter membrane 13, into second chamber 171, in air
Grain object is captured by filter membrane 13.
In certain embodiments, the sample collection device includes air inlet pipe 121, escape pipe 122 and asepwirator pump, institute
It states air inlet pipe 121 to be connected to air and the first chamber 14, the escape pipe 122 is connected to 171 lower end of the second chamber
On second through-hole in face, the asepwirator pump is connect with the escape pipe 122.It is found that when acquisition air sample, asepwirator pump is opened,
Asepwirator pump is evacuated, and air enters from air inlet pipe 121, sequentially passes through first chamber 14, filter membrane 13 and second chamber 171, finally
It is discharged by escape pipe 122.
In certain embodiments, the transfer assembly include one for furl put filter membrane 13 the first paper tape mandrel 167,
One for driving the first driving mechanism 162, one of 167 both forward and reverse directions of the first paper tape mandrel rotation to put filter membrane for furling
Second paper tape mandrel 168, one is used to drive the second driving mechanism 161, one of 168 both forward and reverse directions of the second paper tape mandrel rotation
It is set between the first paper tape mandrel 167 and the second paper tape mandrel 168 and is used to support filter membrane in 13 transmitting path of filter membrane
13 counter wheel 1613 and back turn pulley group, one are correspondingly arranged at the counter wheel 1613 for detecting the rotation of the counter wheel 1613
The detection device 160 for turn-taking several and a control device, the control device respectively with the detection device 160, the first driving machine
Structure 162 and the connection of the second driving mechanism 161, first driving mechanism is controlled according to the detection signal of the detection device 160
162, the running of the second driving mechanism 161, when filter membrane 13 is on the first paper tape mandrel 167 and the second driving mechanism 161 is driven
When dynamic second paper tape mandrel 168 rotates forward, filter membrane 13 is moved through counter wheel 1613 and back turn pulley group to the direction of the second paper tape mandrel 168
Dynamic, when detection device 160 detects that counter wheel 1613 rotates predetermined amount, the second driving mechanism 161 is stopped.This implementation
In example, the predetermined amount is a circle, i.e. the distance that then filter membrane 13 moves that rotates a circle of the counter wheel 1613 is sample collection
Distance of the position to β ray detection locations；Preferably, the detection device 160 selects photoelectric sensor, and the control device
Based on chip microcontroller, in some other embodiments, the control device can also be based on ARM, DSP etc. and control chip realization.
Understandably, in some other embodiments, the predetermined amount can according to sample collection position to β ray detection locations away from
From and counter wheel the settings such as diameter.
In the present embodiment, second driving mechanism, 161 and first driving mechanism 162 is respectively arranged on the first chamber in shell 11
Room 14 and the both ends of Concentration Testing component 15, first driving mechanism 162 include motor 163, gear 164, clutch
165, damper 166 and paper tape gland 169, the motor 163 are mounted on electric machine support 18, which is mounted on
On the shell 11, the damper 166 is sheathed on the transmission shaft 1653 in clutch 165, the gear 164 and the electricity
Gear on machine 163 is meshed, and the clutch 165 is connect by the gear 164 with the motor 163, the motor 163
It is controlled by the control device, the first paper tape mandrel 168 is connect with the transmission shaft 1653 in clutch 165, the paper tape
Gland 169 is fixedly mounted on the paper tape mandrel 168, and filter membrane 13 is fixed on the first paper tape mandrel 168.It is described
Second driving mechanism 161 is identical as 162 structure of the first driving mechanism, and the frictional force of the damper 166 tenses filter membrane 13
Between second driving mechanism 161 and the first driving mechanism 162；The back turn pulley group includes the first back turn pulley 1610, the second rewinding
Wheel 1611 and third back turn pulley 1612, in the present embodiment, when filter membrane 13 is on the first paper tape mandrel 167 and the second driving
When the motor 163 of mechanism 161 works, filter membrane 13 rotates forward under the drive of the second paper tape mandrel 168, counter wheel 1613 and back turn pulley
Group rotates forward under the drive of paper tape frictional force, and the clutch 165 of the second driving mechanism 161 is powered at this time, transmission shaft 1653 and tooth
Wheel 164 is incorporated in motor 163 and drives lower while rotating, and 165 no power of clutch in the first driving mechanism 162, transmission shaft
1653 are respectively freely rotated with gear 164, then the second paper tape mandrel 168 of the second driving mechanism 161 driving is used as driving gear,
The first paper tape mandrel 167 that first driving mechanism 162 drives is used as driven gear, the filter membrane 13 to be passed through successively close to described
First back turn pulley 1610 and counter wheel 1613 of first driving mechanism 162 and close to second driving mechanism 161
Second back turn pulley 1611 and third back turn pulley 1612 transmit, to be moved to the direction of the second paper tape mandrel 168, when detection fills
It sets 160 and detects that the rotation of counter wheel 1613 is turned around, i.e., when blank filter membrane 13 is sent at Concentration Testing component 15, the second driving machine
Structure 161 is stopped.When the first driving mechanism 162 works, the first paper tape mandrel 167 is used as driving gear, the second paper
Band mandrel 168 is used as driven gear, which drives the filter membrane 13 to invert, when detection device 160 detects
The rotation of counter wheel 1613 is turned around, i.e., when filter membrane 13 is transferred by 151 place of penetrating of β ray irradiations source below first through hole, first
Driving mechanism 162 is stopped, and the filter membrane 13 captures the particulate matter in air sample at this time.Based on above-mentioned design, the resistance
Buddhist nun's device 166 plays damping action to transmission shaft 1653, and since filter membrane 13 is soft material, both sides are supported by transmission wheel, middle part
Dividing can not support because test needs, and the frictional force of damping wheel can make paper tape fully tensioned.
The concrete structure of clutch 165 in the application is illustrated with reference to Fig. 3 and Fig. 4, Fig. 3 and Fig. 4.By attached drawing it is found that institute
Stating clutch 165 includes：Coil fixed bin 1651, electromagnetic coil 1652, transmission shaft 1653, drive axle seat 1654, electromagnetism are inhaled
Close piece 1655, gear shift part 1656, locating cover 1657, snap ring 1658 and gear shaft 1659, the electromagnetic coil 1652 and
Drive axle seat 1654 is sequentially arranged on the coil fixed bin 1651, i.e., the electromagnetic coil 1652 is enclosed in coil fixed bin
Between 1651 and drive axle seat 1654, the transmission shaft 1653 is mounted on the drive axle seat 1654, the gear shift part
1656 are mounted on the coil fixed bin 1651, and the electromagnetism is attracted piece 1655 and is mounted on gear shift part 1656, described
Gear shaft 1659 is connect with the gear shift part 1656, and to install gear 164, the snap ring 1658 and locating cover 1657 are successively
It is sheathed on the transmission shaft 1653, the coil fixed bin 1651 in the application is the fixing piece of entire clutch 165, Suo Youqi
He installs part as benchmark.When electromagnetic coil 1652 is powered, magnet is attracted piece 1655 and is magnetized, with drive axle seat
1654 are pulled together, and transmission shaft 1653 rotates simultaneously with gear shaft 1659, i.e., by gear 164 under the drive of motor 163
It rotates simultaneously；And when 1652 no power of electromagnetic coil, transmission shaft 1653 is respectively freely rotated with gear shaft 1659.
The course of work of particle concentration detection device 10 is as follows in the present embodiment：
When the particle concentration and filter membrane 13 for needing detection air are on the first paper tape mandrel 167, control device
Control instruction is sent to the motor 163 of the second driving mechanism 161, to drive the motor 163 of the second driving mechanism 161 to work, filter
Film 13 rotates forward under the drive of the second paper tape mandrel 168, counter wheel 1613 and back turn pulley group under the drive of paper tape frictional force just
Turn, at this time because the clutch 165 of the second driving mechanism 161 is powered, transmission shaft 1653 is incorporated in the drive of motor 163 with gear 164
Down while rotating, and 165 no power of clutch in the first driving mechanism 162, transmission shaft 1653 respectively freely turn with gear 164
Dynamic, then the second paper tape mandrel 168 is used as driving gear, and the first paper tape mandrel 167 is used as driven gear, the filter membrane 13 according to
It is secondary to be transmitted through the first back turn pulley 1610, counter wheel 1613, the second back turn pulley 1611 and third back turn pulley 1612, when detection fills
It sets 160 and detects that the rotation of counter wheel 1613 is turned around, i.e., when blank filter membrane 13 is sent at Concentration Testing component 15, detection device
160 send a signal to control device, so that the second driving mechanism 161 is stopped, the β that opening is divided into 13 both sides of filter membrane is penetrated
Line source 151 and β scintillation detectors 152, and the β ray irradiations source 151 for recording the detection of β scintillation detectors 152 passes through blank
Filter membrane 13 β transmitted intensity n1, control device is sent a signal to after record, the control device drives the first driving machine
The motor 163 of structure 162 works, and the filter membrane 13 inverts under the drive of the first paper tape mandrel 167, at this time the first paper tape mandrel
167 are used as driving gear, and the second paper tape mandrel 168 is used as driven gear, when detection device 160 detects the counter wheel
1613 rotate a circle, and send instructions to control device, then motor 163 is stopped, and filter membrane 13 is by β rays after blank detection at this time
151 place of penetrating of radioactive source is transmitted to the lower section of the first through hole of first chamber 14, and control device sends control instruction to third and drives
Motivation structure, the third driving mechanism are moved up according to the control instruction driving seal assembly 17 from the control device,
Until filter membrane 13 is clamped in it between 14 lower face of first chamber, asepwirator pump is opened at this time, and asepwirator pump pumping starts to adopt
Sample, air enter from air inlet pipe 121, sequentially pass through first chamber 14, filter membrane 13 and second chamber 171, and from escape pipe 122
Discharge, filter membrane 13 capture the particulate matter in air, and control device controls third driving mechanism to drive sealing group after sampling
Part 17 moves down, and filter membrane 13 is made to be detached with seal assembly 17, and the motor 163 of second driving mechanism 161 is driven to work
To drive filter membrane 13 to rotate forward, when detection device 160 detects that the counter wheel 1613 rotates a circle, then control dress is sent instructions to
It sets, so that the motor 163 of the second driving mechanism 161 is stopped, the capture of filter membrane 13 at this time, which has, is sent to concentration at particulate matter
At detection components 15, β ray irradiations source 151 and the β scintillation detectors 152 for being divided into 13 both sides of filter membrane are opened, to detect and remember
Record β ray irradiations source 151 passes through the β transmitted intensity n2 for capturing the filter membrane 13 for having particulate matter, Beta-ray logical according to what is detected twice
The rate of mistake can calculate the particle concentration of air.Understandably, the application is set by the detection of detection device 160 in transfer assembly
The rotating cycle for the counter wheel 1613 being placed in 13 transmitting path of filter membrane judges the displacement distance of filter membrane 13, to transport filter membrane 13
Accurate back and forth movement can be improved with the blank testing sample at the same position of filter membrane 13 and the β ray percent of pass after collection sample
Particle concentration measuring accuracy.
It is the structural schematic diagram of 10 second embodiment of the application particle concentration detection device with reference to Fig. 5, Fig. 5.This implementation
Example is with above-mentioned first embodiment the difference is that the particle concentration detection device 10 further includes having X-fluorescence detection group
Part, the X-fluorescence detection components are adjacent with the Concentration Testing component 15, are located at 13 upper end of the filter membrane, to detect in air
Element species and content.The X-fluorescence detection components include X-ray tube 181, beam splitter 182 and detector 183, institute
It states X-ray tube 181 and generates incident X-rays, for excitation sample to generate X-fluorescence, the beam splitter 182 carries out X-fluorescence
Light splitting, the spectral line of element to be measured is separated, the detector 183 examines the spectral line for the element to be measured separated
It surveys, is formed with detecting sample element.
It is the flow diagram of one specific embodiment of particle concentration detection method with reference to Fig. 6, Fig. 6.The detection method packet
It includes：
S101, control device driving transfer assembly drive filter membrane to rotate forward, and the filter membrane of blank is sent to Concentration Testing group
At part.
In the step, the transfer assembly includes one for furling the first paper tape mandrel for putting filter membrane, one for driving
First driving mechanism of the first paper tape mandrel both forward and reverse directions rotation, one are for furling the second paper tape mandrel for putting filter membrane, one
For drive the second driving mechanism of the second paper tape mandrel both forward and reverse directions rotation, one be set to the first paper tape mandrel and
The counter wheel for being used to support filter membrane and back turn pulley group between second paper tape mandrel in filter membrane transmitting path, one are correspondingly arranged in institute
State for detecting the detection device and a control device of the counter wheel rotating cycle at counter wheel, the control device respectively with
The detection device, the first driving mechanism are connected with the second driving mechanism, and institute is controlled according to the detection signal of the detection device
The running for stating the first driving mechanism, the second driving mechanism, when filter membrane is on the first paper tape mandrel and the second driving mechanism is driven
When dynamic second paper tape mandrel rotates forward, filter membrane is moved through counter wheel and back turn pulley group to the direction of the second paper tape mandrel, when detection fills
Set detect counter wheel rotate predetermined amount when, the second driving mechanism is stopped.In the present embodiment, the counter wheel rotation one
The distance of all then filter membrane movement is distance of the sample collection position to β ray detection locations.
When not acquiring sample then, if filter membrane, on the first paper tape mandrel, control device drives in transfer assembly
Second driving mechanism works, and detection device detects that counter wheel rotates a circle, then filter membrane clean at this time is sent to Concentration Testing
At component, second driving mechanism is stopped.
β ray irradiations source in S102, Concentration Testing component emits β rays, the β flash detections in the Concentration Testing component
Device detection β ray irradiations source passes through the β transmitted intensities n1 of the filter membrane of blank and records.
In the step, set up separately in the β ray irradiations source of filter membrane both sides and the work of β scintillation detectors, β ray irradiations source is to filter
Film emits β rays, and β scintillation detectors detect the β transmitted intensities n1 that β ray irradiations source passes through the filter membrane of blank.
S103, control device driving transfer assembly drive filter membrane reversion, and filter membrane is transmitted by the β ray irradiations source place of penetrating
To the first through hole of first chamber.
In the step, control device drives the first driving mechanism work in transfer assembly, when detection device detects meter
Number wheel rotates a circle, i.e., when filter membrane is transported to below first through hole, the first driving mechanism is stopped.
S104, third driving mechanism driving seal assembly move up, and filter membrane is clamped end face on it and the first chamber
Between the lower face of room.
In the step, the seal assembly includes second chamber, and third driving mechanism is equipped in it, to drive sealing
Component moves up and down, and the second chamber upper surface is equipped with the second through-hole, when the seal assembly is in the drive of third driving mechanism
It is move upwardly until under dynamic when filter membrane is clamped in it between first chamber lower face, the filter membrane is by first through hole and second
Through-hole seals.
S105, sample collection device is opened, starts to sample, air enters from sample collection device, sequentially passes through the first chamber
Room and filter membrane, filter membrane capture the particulate matter in air.
In the step, the second chamber is equipped with the second through-hole of a perforation, and the sample collection device includes air inlet
Pipe, escape pipe and asepwirator pump, the air inlet pipe are connected to air and the first chamber, and the escape pipe is connected to described the
On second through-hole of two chamber lower faces, the asepwirator pump is connect with the escape pipe.Open the air-breathing in sample collection device
Pump, asepwirator pump pumping, starts to sample, and air enters from the air inlet pipe in sample collection device, passes through first chamber, passes through first
Through-hole reaches filter membrane, and passes through filter membrane, is discharged into second chamber and by escape pipe, filter membrane can capture the particle in air
Object.
After S106, sampling, control device drives transfer assembly that filter membrane is driven to rotate forward, and filter membrane capture is had particulate matter
Place is sent at Concentration Testing component.
S107, β ray irradiation source emit β rays, and β scintillation detectors detection β ray irradiations source passes through capture to have particulate matter
Filter membrane β transmitted intensities n2 and record.
S108, the β transmitted intensity n1 and β transmitted intensities n2 detected according to the β scintillation detectors calculate of air
Grain object concentration.
In some other embodiments, β transmitted intensity n1 and the β rays according to β scintillation detectors detection are strong
Degree n2 further includes after calculating the particle concentration of air：Control device drives transfer assembly that filter membrane is driven to rotate forward, by filter membrane
Capture, which has, to be sent at particulate matter below X-fluorescence detection components, to detect element species and content in air.
In conclusion the utility model can drive filter membrane to move back and forth by transfer assembly, before not acquiring sample, if
Filter membrane is on the first paper tape mandrel, then the second driving mechanism in transfer assembly drives the second paper tape mandrel to rotate forward, with band
It is that filter membrane is moved through the counter wheel and back turn pulley group to the direction of the second paper tape mandrel that dynamic filter membrane, which rotates forward, when detection device detects
To counter wheel rotating cycle be predetermined amount when, control device control it is described second driving is stopped, to detect blank filter membrane
β ray percent of pass；Control device drives first driving mechanism to drive filter membrane reversion after detection, when detection device is examined
Measure counter wheel rotating cycle be predetermined amount when, the first driving mechanism is stopped, at this time blank detection after filter membrane by β rays
The radioactive source place of penetrating is transmitted at sample collection to make filter membrane capture the particulate matter in air sample, control circuit after sampling
It drives the second driving mechanism that filter membrane is driven to rotate forward, with Beta-ray percent of pass after detection collection sample, is penetrated according to the β detected twice
The percent of pass of line can calculate the particle concentration of air, it is known that, the utility model is examined by the detection device in transfer assembly
The rotating cycle of counter wheel that is set in filter membrane transmitting path is surveyed to judge the displacement distance of filter membrane, it is precisely past to transport filter membrane
Movement is returned, with the blank testing sample at the same position of filter membrane and the β ray percent of pass after collection sample, ensure that blank is examined
It surveys, air particle is collected and its is detected in filter membrane same position, to improve particle concentration measuring accuracy.
The above is only the preferred embodiment of the present invention, rather than does limitation in any form to the application.This
The technical staff in field can impose various equivalent changes and improvement on the basis of the above embodiments, all in right
Interior done equivalent variations or modification, should all fall within the scope of the present application.
Claims (7)
1. a kind of transfer assembly, round-trip for transporting filter membrane, it is characterised in that：The transfer assembly include one for furl put
First paper tape mandrel of filter membrane, one are for driving the first driving mechanism of the first paper tape mandrel both forward and reverse directions rotation, one to use
The second paper tape mandrel, second driving machine for driving the second paper tape mandrel both forward and reverse directions rotation of filter membrane are put in retracting
Structure, one are set to the meter for being used to support filter membrane between the first paper tape mandrel and the second paper tape mandrel in filter membrane transmitting path
Number wheel and back turn pulley group, one be correspondingly arranged at the counter wheel for detect the counter wheel rotating cycle detection device and
One control device, the control device are connect with the detection device, the first driving mechanism and the second driving mechanism respectively, according to
The detection signal of the detection device controls the running of first driving mechanism, the second driving mechanism, when filter membrane is wound on
On one paper tape mandrel and when the second paper tape mandrel is driven to rotate forward for the second driving mechanism, filter membrane is through counter wheel and back turn pulley group to second
The direction of paper tape mandrel is moved, and when detection device detects that counter wheel rotates predetermined amount, the second driving mechanism is stopped.
2. transfer assembly as described in claim 1, it is characterised in that：Second driving mechanism and the first driving mechanism structure
Identical, first driving mechanism includes motor and motor meshed gears, clutch and damper, the damper set
On the transmission shaft in clutch, the clutch is connect by the gear with the motor, and the first paper tape core
Axis and the transmission axis connection；The back turn pulley group includes the first back turn pulley, the second back turn pulley and third back turn pulley, works as filter membrane
On the first paper tape mandrel and when the motor of the second driving mechanism works, the second paper tape of the second driving mechanism driving
Mandrel is as driving gear, and the first paper tape mandrel is as driven gear, and the filter membrane is successively through first back turn pulley, meter
Number wheel, the second back turn pulley and the transmission of third back turn pulley, are moved to the direction of the second paper tape mandrel.
3. transfer assembly as claimed in claim 2, it is characterised in that：First driving mechanism further includes having paper tape gland,
The paper tape gland is fixedly mounted on the first paper tape mandrel.
4. a kind of particle concentration detection device, which is characterized in that the particle concentration detection device includes：Shell is set
It is placed in the sample collection device on shell and the filter membrane being set in the shell, first chamber, Concentration Testing component and biography
Sending component, wherein the sample collection device and air communication, the first chamber are connected to sample collection device, and at it
Lower face is equipped with a first through hole, and the filter membrane is laid in the first chamber lower face, the Concentration Testing component with it is described
First chamber is adjacent comprising is respectively arranged at β ray irradiations source and the β scintillation detectors of the filter membrane both sides, the transmission
Component is the claims 1-3 any one of them transfer assemblies, and the first driving mechanism and second in the transfer assembly are driven
Motivation structure is respectively arranged on the both ends of first chamber and Concentration Testing component, for driving the filter membrane in the first chamber and
It is translated between Concentration Testing component.
5. particle concentration detection device as claimed in claim 4, it is characterised in that：The particle concentration detection device is also
Include seal assembly, the seal assembly is located at below the first chamber, which includes second chamber, and its
Interior to be equipped with third driving mechanism, to drive seal assembly to move up and down, which is controlled by the control device, institute
It states second chamber upper surface and is equipped with the second through-hole, be move upwardly until when under driving of the seal assembly in third driving mechanism
When filter membrane is clamped in it between first chamber lower face, the filter membrane seals first through hole and the second through-hole, at this time into
The air for entering first chamber passes through filter membrane, and into second chamber, the particulate matter in air is captured by filter membrane.
6. particle concentration detection device as claimed in claim 5, it is characterised in that：The second through-hole perforation described second
Chamber, the sample collection device include air inlet pipe, escape pipe and asepwirator pump, the air inlet pipe and air and described first
Chamber, the escape pipe are connected on the second through-hole of the second chamber, and the asepwirator pump is connect with the escape pipe.
7. particle concentration detection device as claimed in claim 4, which is characterized in that the particle concentration detection device is also
Include X-fluorescence detection components, the X-fluorescence detection components are adjacent with the Concentration Testing component, are located at the filter membrane upper end,
To detect element species and content in air.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721924736.3U CN207738156U (en) | 2017-12-29 | 2017-12-29 | A kind of transfer assembly and particle concentration detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721924736.3U CN207738156U (en) | 2017-12-29 | 2017-12-29 | A kind of transfer assembly and particle concentration detection device |
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| CN207738156U true CN207738156U (en) | 2018-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108190576A (en) * | 2017-12-29 | 2018-06-22 | 深圳市华唯计量技术开发有限公司 | A kind of transfer assembly and particle concentration detection device and detection method |
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2017
- 2017-12-29 CN CN201721924736.3U patent/CN207738156U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108190576A (en) * | 2017-12-29 | 2018-06-22 | 深圳市华唯计量技术开发有限公司 | A kind of transfer assembly and particle concentration detection device and detection method |
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