CN108709780A - Surrounding air bioxin sampling instrument - Google Patents
Surrounding air bioxin sampling instrument Download PDFInfo
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- CN108709780A CN108709780A CN201810572885.0A CN201810572885A CN108709780A CN 108709780 A CN108709780 A CN 108709780A CN 201810572885 A CN201810572885 A CN 201810572885A CN 108709780 A CN108709780 A CN 108709780A
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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
- G01N1/24—Suction devices
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Abstract
The present invention provides a kind of surrounding air bioxin sampling instrument, air resistance and equipment noise when reducing sampling.The surrounding air bioxin sampling instrument, including host, sampling head, flow meter assembly, fan assembly, environment temperature sensor and pressure flow sensor, flow meter assembly includes flowmeter gas chamber, the warm component of meter, a positive pressure hollow pipe and a negative pressure hollow pipe, the pressure port that perforation is equipped with positioned at the tube body windward side of flowmeter plenum interior of positive pressure hollow pipe, the tube body leeward positioned at flowmeter plenum interior of negative pressure hollow pipe are equipped with the pressure port of perforation；The outer end of positive pressure hollow pipe is tightly connected the positive pressure pressure-tapping nozzle of pressure flow sensor, and the outer end of negative pressure hollow pipe is tightly connected the negative pressure pressure-tapping nozzle of pressure flow sensor.Its flowmeter approximation pitot tube type differential pressure flowmeter of the invention does not increase system resistance, then when same traffic, sampling pump live load is small, reduces the running noise under same traffic while can guarantee measurement differential pressure stability.
Description
Technical field
The present invention relates to the gas sampling technologies fields in enviromental protection instrument, and in particular to the structure of air bioxin sampling instrument
It improves.
Background technology
The working environment of surrounding air bioxin sampling instrument place mostly closer apart from residential block, then to the low of sampling instrument
Noise requirements are higher；And monitoring of environmental air bioxin, the sampling volume needed about 1000m3, then the sampling time is longer, into one
It is urgent to walk the demand improved to the sampling instrument of big flow low noise.
The primary structure composition of surrounding air bioxin sampling instrument generally includes sampling head（Including filter membrane component and absorption group
Part）And host, the mounting portion coordinated with sampling head, flowmeter, fan assembly and temperature sensor are provided with to measure on host
Environment temperature.In the prior art, the flow measurement of surrounding air bioxin sampling instrument mostly uses orifice differential pressure flowmeter, leads to
Air-flow calculates the flow by orifice plate by differential pressure caused by orifice plate when crossing motor operation, and control electricity is pumped by adjusting
Pressure adjusts revolution speed, and to reach the flow of setting, for orifice differential pressure flowmeter when differential pressure is smaller, output pulsation is larger, from
And cause calculated flowed fluctuation larger, to reduce flowed fluctuation, orifice-plate flowmeter institute energy when need to just improve same traffic
The differential pressure got also just necessarily results in the increase of system resistance, and the rotating speed and power consumption to make sampling pump are promoted, and operating is made an uproar
Sound also can be improved accordingly；Meanwhile the sampling flow of surrounding air bioxin sampling instrument is inlet flow rate, the control of the flow with
Environment temperature is closely related, and existing the type sampling instrument, environment temperature sensor are generally located on sampling instrument host shell
On outer surface, measured environment temperature produced heat can be influenced and extraneous direct sunlight shadow in by host operational process
It rings, ambient temperature measurement is made to generate deviation, to influence the control of sampling flow, sampling flow is made to generate relatively large deviation；
Furthermore the sampling head part of sampling instrument（Including filter membrane component and absorbent module）It is seperated design with the host machine part of sampling instrument,
It is mounted on host when in use, for ease of carrying and installing, sampling head portion size is smaller, and correspondingly, filter membrane size is smaller,
When same traffic samples, filter membrane size is smaller, and air resistance is bigger.
Invention content
The present invention provides a kind of surrounding air bioxin sampling instrument, air resistance and equipment noise when reducing sampling.
To reach above-mentioned technical purpose, the present invention is achieved by the following scheme：A kind of surrounding air bioxin
Sampling instrument, including host, sampling head, the flow meter assembly being tightly connected with sampling head, the wind being tightly connected with flow meter assembly
Thermomechanical components, environment temperature sensor and pressure flow sensor, the host includes shell and the cavity that is surrounded by shell, described
Flow meter assembly and fan assembly setting are in the cavity；The flow meter assembly includes the drum flow meter gas for erectting setting
Room, temperature component, a positive pressure hollow pipe and a negative pressure hollow pipe based on detection stream gauge gas chamber temperature, the positive pressure hollow pipe
It is parallel with the negative pressure hollow pipe and be oppositely arranged up and down, and be plugged in the circumferential side wall of the flowmeter gas chamber, it plugs
Position is respectively provided with sealing element；The inner end of the positive pressure hollow pipe and the negative pressure hollow pipe is all closed and is located at the flowmeter gas
The inside of room, outer end is open and is respectively positioned on outside the flowmeter gas chamber；The positive pressure hollow pipe is located at the flowmeter gas
The tube body windward side of chamber interior is equipped with the pressure port of perforation, and the negative pressure hollow pipe is located at the flowmeter plenum interior
Tube body leeward is equipped with the pressure port of perforation；The outer end of the positive pressure hollow pipe is tightly connected the pressure flow sensor
The outer end of positive pressure pressure-tapping nozzle, the negative pressure hollow pipe is tightly connected the negative pressure pressure-tapping nozzle of the pressure flow sensor.
Central axis of the central axis of the positive pressure hollow pipe and the negative pressure hollow pipe with the flowmeter gas chamber
It intersects vertically.
Hollow pipe fixed plate, the positive pressure hollow pipe and the negative pressure are installed in the circumferential side wall of the flowmeter gas chamber
The outer end of hollow pipe is pierced by the hollow pipe fixed plate and is welded to connect with the hollow pipe fixed plate.
The warm component of the meter includes temperature sensor and fixed plate, and the temperature sensor is installed in the fixed plate,
The circumferential side wall of the flowmeter gas chamber is equipped with the mounting hole with the warm component cooperation of the meter, and the fixed plate is installed in described
In the circumferential side wall of flowmeter gas chamber and the temperature sensor is embedded in the inside of the flowmeter gas chamber, the fixed plate and institute
It states and sealing element is set between mounting hole.
The upper end of the flowmeter gas chamber is connected with mounting plate, and the periphery of the mounting plate is fixed on the interior of the shell
Wall.
There is necking part, the suction nozzle sealing of the necking part and the fan assembly to connect for the lower end of the flowmeter gas chamber
It connects.
The sampling head is integrally mounted in the cavity, and in the top of the flow meter assembly and the flowmeter group
Part connects, and the sampling head includes filter membrane component and the absorption cartridge module below filter membrane component, the filter membrane component and institute
Absorption cartridge module is stated to be connected by funnel-form switching cylinder positioned there between, the upper end edges great Kou of the funnel-form switching cylinder with
The edge of the filter membrane component, which corresponds to, to be tightly connected, lower end osculum edge and the absorbing cylinder of the funnel-form switching cylinder
The upper end opening of component is tightly connected, and the lower ending opening of the absorption cartridge module connects with the upper end sealing of the flowmeter gas chamber
It connects.
The upper junction plate of annular is installed on the inner wall of the shell, the funnel-form switching cylinder passes through the upper junction plate
And the big mouth overlapping edges in upper end of the funnel-form switching cylinder are on the upper junction plate, the edge of the filter membrane component and
The upper end edges great Kou of the funnel-form switching cylinder are removably connected in by top opening nut on the upper junction plate.
The shell is equipped with circumstance temperature sensor mounting hole, and forced draft fans are equipped at the circumstance temperature sensor mounting hole,
The environment temperature sensor is mounted on the air draught side of the forced draft fans.
The upper end opening of the shell, and opening is equipped with protective cover.
In surrounding air bioxin sampling instrument of the present invention, flow meter assembly includes the drum flow meter gas for erectting setting
Room, temperature component, a positive pressure hollow pipe and a negative pressure hollow pipe based on detection stream gauge gas chamber temperature, the positive pressure hollow pipe
It is parallel with the negative pressure hollow pipe and be oppositely arranged up and down, and be plugged in the circumferential side wall of the flowmeter gas chamber, it plugs
Position is respectively provided with sealing element；The inner end of the positive pressure hollow pipe and the negative pressure hollow pipe is all closed and is located at the flowmeter gas
The inside of room, outer end is open and is respectively positioned on outside the flowmeter gas chamber；The positive pressure hollow pipe is located at the flowmeter gas
The tube body windward side of chamber interior is equipped with the pressure port of perforation, and the negative pressure hollow pipe is located at the flowmeter plenum interior
Tube body leeward is equipped with the pressure port of perforation；Air-flow from top to bottom flows through in drum flow meter gas chamber, flows through positive pressure hollow
Pipe and negative pressure hollow pipe are divided into face air-flow and distinguish back to air-flow, the outer end of positive pressure hollow pipe and the outer end of negative pressure hollow pipe
It is tightly connected the positive pressure pressure-tapping nozzle and negative pressure pressure-tapping nozzle of pressure flow sensor, counts warm component measurable flow through in flowmeter gas chamber
The temperature of gas can calculate flow velocity according to temperature and pressure, to achieve the purpose that measure flow velocity；The principle of the flowmeter is close
Like pitot tube type differential pressure flowmeter, while this kind of flowmeter can guarantee measurement differential pressure stability, do not increase the resistance of system, from
And when making same traffic, the live load of sampling pump is small, reduces the running noise under same traffic.
Description of the drawings
Fig. 1 is the dimensional structure diagram of surrounding air bioxin sampling instrument of the present invention；
Fig. 2 is the front view of Fig. 1；
Fig. 3 is the A-A direction views of Fig. 2；
Fig. 4 is the structural schematic diagram of the flow meter assembly of surrounding air bioxin sampling instrument of the present invention；
Fig. 5 is the sectional view of Fig. 4（The axis of cutting plane overcurrent gauge gas chamber and the axis of hollow pipe）；
Fig. 6 is the portions the I schematic enlarged-scale view of Fig. 5.
Specific implementation mode
Technical scheme of the present invention is described in further detail with reference to the accompanying drawings and detailed description.
Referring to figs. 1 to Fig. 3, a kind of surrounding air bioxin sampling instrument, including host 100, sampling head 200 and sampling head
200 flow meter assemblies 300 being tightly connected and the fan assembly 400 of the sealed connection of flow meter assembly 300, environment temperature sense
Device 500 and pressure flow sensor（It is not shown in figure）；Host 100 includes shell 110 and the cavity 120 surrounded by shell 110,
Flow meter assembly 300 and fan assembly 400 are arranged in cavity 120；With reference to Fig. 3 to Fig. 6, flow meter assembly 300 includes erectting
The drum flow meter gas chamber 310 of setting, temperature component 320,330 and of a positive pressure hollow pipe based on detection stream gauge gas chamber temperature
One negative pressure hollow pipe 340, positive pressure hollow pipe 330 is parallel with negative pressure hollow pipe 340 and is oppositely arranged up and down, and the two is plugged in
It in the circumferential side wall of flowmeter gas chamber 310, plugs position and is respectively provided with sealing element, is i.e. hollow pipe and flowmeter gas chamber 310 plugs
Sealing ring is arranged in matching part or fluid sealant realizes the sealing for plugging position；Positive pressure hollow pipe 330 and negative pressure hollow pipe 340 it is interior
End is all closed and positioned at the inside of flowmeter gas chamber 310, outer end is open and is respectively positioned on outside flowmeter gas chamber 310, i.e., positive pressure is empty
Core pipe 330 and negative pressure hollow pipe 340 are that one section of tube body is located inside flowmeter gas chamber 310, and remaining one section of tube body is located at flow
Count the outside of gas chamber 310；The windward side for that section of tube body of positive pressure hollow pipe 330 being located inside flowmeter gas chamber 310（Air-flow exists
From top to bottom flowed through in drum flow meter gas chamber 310, in airflow direction such as Fig. 5 and Fig. 6 in drum flow meter gas chamber 310 vertically to
Under arrow direction, flow through positive pressure hollow pipe 330, the upper surface face air-flow of positive pressure hollow pipe 330, referred to as windward side）On set
There are the pressure port 331 of perforation, the leeward for that section of tube body of negative pressure hollow pipe 340 being located inside flowmeter gas chamber 310（Air-flow
It is from top to bottom flowed through in drum flow meter gas chamber 310, flows through positive pressure hollow pipe 330, then flow through negative pressure hollow pipe 340, born
Press the tube body lower surface of hollow pipe 340 back to air-flow, referred to as leeward）It is equipped with the pressure port 341 of perforation；Positive pressure hollow pipe
330 outer end is tightly connected the positive pressure pressure-tapping nozzle of pressure flow sensor, and the outer end of negative pressure hollow pipe 340 is tightly connected flow pressure
The negative pressure pressure-tapping nozzle of force snesor.
Specifically, when surrounding air bioxin sampling instrument works, fan assembly work is drawn ambient air into host,
Air-flow from top to bottom flows through in drum flow meter gas chamber 310, flows through positive pressure hollow pipe 330 and negative pressure hollow pipe 340, respectively
Face air-flow and it is tightly connected flow pressure respectively back to air-flow, the outer end of positive pressure hollow pipe 330 and the outer end of negative pressure hollow pipe 340
The positive pressure pressure-tapping nozzle and negative pressure pressure-tapping nozzle of force snesor count warm temperature of 320 measurable flow of component through flowmeter gas indoor gas,
It can be with calculated gas flow flow velocity, to achieve the purpose that measure flow velocity according to measured temperature and pressure.The principle of the flowmeter is close
Like pitot tube type differential pressure flowmeter, while this kind of flowmeter can guarantee measurement differential pressure stability, do not increase the resistance of system, from
And when making same traffic, the live load of sampling pump is small, reduces the running noise under same traffic.
Further, it to flow through truth of the air flow rate close to flow of hollow pipe, improves and measures
Accuracy, it is preferable that central shaft of the central axis of positive pressure hollow pipe 330 and negative pressure hollow pipe 340 with flowmeter gas chamber 310
Line intersects vertically, i.e., positive pressure hollow pipe 330 and negative pressure hollow pipe 340 are perpendicularly oriented to the central axis of flowmeter gas chamber 310, and
The intubating length of positive pressure hollow pipe 330 and negative pressure hollow pipe 340 is as long as possible, so that air-flow adequately flows through pressure port 331,341.
Since positive pressure hollow pipe 330 and negative pressure hollow pipe 340 will have air-flow to pass through, to improve positive pressure hollow pipe 330 and bearing
Stability of the hollow pipe 340 on flowmeter gas chamber 310 is pressed, as shown in figure 4, solid in the circumferential side wall of flowmeter gas chamber 310
Equipped with hollow pipe fixed plate 350, the outer end of positive pressure hollow pipe 330 and negative pressure hollow pipe 340 be pierced by hollow pipe fixed plate 350 and with
Hollow pipe fixed plate 350 is welded to connect.
For the warm component 320 of meter, its role is to the temperature of air-flow is flowed through in detection stream gauge gas chamber 310 comprising temperature
Degree sensor 322 and fixed plate 321, temperature sensor 322 are installed in fixed plate 321, the circumferential side wall of flowmeter gas chamber 310
It is equipped with the mounting hole coordinated with the warm component 320 of meter, fixed plate 321 is installed in the circumferential side wall of flowmeter gas chamber 310 and temperature
The inside that sensor 322 is embedded in flowmeter gas chamber 310 is spent, and then flows through the temperature of air-flow in detectable flowmeter gas chamber 310, Gu
Sealing element is set between fixed board 321 and mounting hole to ensure to seal.
For installation of the flow meter assembly 300 in cavity 120, specifically, it is connected in the upper end of flowmeter gas chamber 310
Mounting plate 360, as shown in Figure 3 and Figure 4, the periphery of mounting plate 360 are fixed on by screw on the inner wall of shell 110.Specifically,
The contour shape of mounting plate 360 is matched with the transverse cross-sectional profile shape of shell 110, and flow meter assembly 300 is located at mounting plate 360
Lower section, sampling head 200 is located at the top of mounting plate 360, and the lower end of sampling head 200 is connect with mounting plate 360, flow meter assembly
300 upper end is connect with mounting plate 360, and connecting plate 360 has intermediate throughholes, ensures lower end and the flowmeter group of sampling head 200
The upper end of part 300 communicates.
There is necking part 311 to realize reducing to facilitate the suction nozzle with fan assembly 400 for the lower end of flowmeter gas chamber 310
410 connections, necking part 311 are tightly connected by the suction nozzle 410 of hose 600 and fan assembly 400.
To solve in the prior art, sampling head part（Including filter membrane component and absorbent module）With the host machine part of sampling instrument
It is designed for fission, sampling head part is size-limited, and filter membrane size is smaller, and when same traffic samples, filter membrane size is smaller, gas
The bigger problem of resistance, in the present embodiment, sampling head 200 is integrally mounted in cavity 120, without individually carrying and scene peace
Dress, size can be as much as possible close to cavity space size, and 120 space of cavity is bigger, and 200 size of sampling head is bigger, correspondingly,
Filter membrane size is bigger；Sampling head 200 is located at the top of flow meter assembly 300 and is connect with flow meter assembly 300；As shown in figure 3,
Absorption cartridge module 220 of the sampling head 200 including filter membrane component 210 and positioned at 210 lower section of filter membrane component, filter membrane component 210 and suction
The operation principle and building block of attached cartridge module 220 are compared with technology, unlike the prior art, due to filter membrane component 210
Size fitting cavity 120 size design, the lateral cross section of cavity 120 is rectangular in the present embodiment, to make every effort to filter membrane size
It is as big as possible, then filter membrane component 210 be with cavity 120 it is matched rectangular, and adsorb 220 size of cartridge module it is smaller and be usually justify
Tubular is then connected between filter membrane component 210 and absorption cartridge module 220 by funnel-form switching cylinder 230 positioned there between, funnel
The upper end edges great Kou of shape switching cylinder 230 are corresponding with the edge of filter membrane component 210 to be tightly connected, funnel-form switching cylinder 230
Lower end osculum edge with absorption cartridge module 220 upper end opening be tightly connected, adsorb cartridge module 220 lower ending opening and flow
The upper end for counting gas chamber 310 is tightly connected.
Further, the upper junction plate 140 of annular is installed on the inner wall of shell 110, funnel-form switching cylinder 230 passes through upper
The big mouth overlapping edges in the upper end of connecting plate 140 and funnel-form switching cylinder 230 are on upper junction plate 140, the edge of filter membrane component 210
Position and the upper end edges great Kou of funnel-form switching cylinder 230 are removably connected in upper junction plate by top opening nut 150
On 140, to ensure that the installation strength of filter membrane component 210 and funnel-form switching cylinder 230, and by adjusting top opening nut,
Filter membrane clip and PUF can be taken out, be user-friendly for the replacement of filter membrane and sorbing material.
Specifically, filter membrane component 210 includes filter membrane clip, filter membrane clip pressing plate and filter membrane, and the upper end of funnel-form switching cylinder 230 is big
It mouthful is tightly connected with filter membrane clip gasket, filter membrane clip pressing plate is by top opening nut 150 by filter membrane clip and funnel-form switching cylinder 230
The big mouth in upper end be fixed on jointly on upper junction plate 140, filter membrane be embedded in filter membrane clip in.It adsorbs cartridge module 220 and uses PUF（Poly- ammonia
Ester foam）Absorption comprising glass absorbing cylinder, PUF and gasket, PUF are filled in glass absorbing cylinder, and absorbing cylinder trawlnet is located at
To prevent foreign matter from falling into cylinder, absorption 220 one end of cartridge module and funnel-form switching cylinder 230 are tightly connected tube port position, the other end with
Flow meter assembly 300, which is formed, to be tightly connected.
It is arranged on sampling instrument host shell outer surface to solve environment temperature sensor in the prior art, measured ring
Border temperature can produced heat be influenced in by host operational process and extraneous direct sunlight influences, and makes ambient temperature measurement
Generate deviation, to influence the control of sampling flow, make sampling flow lead to the problem of relatively large deviation this, in the present embodiment, shell
110 are equipped with circumstance temperature sensor mounting hole, and forced draft fans 700, environment temperature sensor are equipped at circumstance temperature sensor mounting hole
500 are mounted on the air draught side of forced draft fans 700（That is environment temperature sensor 500 is outer with respect to forced draft fans 700, i.e., relatively
Forced draft fans 700 are far from host center axis）, surrounding air is sucked by forced draft fans 700, surrounding air is directly through environment temperature
Sensor 500 is spent, to measure circumstance temperature, that is, induced air type ambient temperature measurement mode is realized, can effectively reduce host temperature rise
Caused ambient temperature deviation, and prevent instrument outdoors for a long time in use, since direct sunlight causes temperature sensor
Testing result deviates practical circumstance temperature numerical value.To protect forced draft fans 700 and environment temperature sensor 500, passed in circumstance temperature
Sensor mounting hole configures ventilation rainproof cover 800, and the setting structure of ventilation rainproof cover 800 is quick detachable, is provided just for later period maintenance
Profit.
For ease of installation, the upper end opening of host shell 110, and opening is equipped with protective cover 130, protective cover
130 can be hinged on by the hinged mode in side on shell 100, and closing is easy to open.And complete machine uses universal wheel 900 so that
Instrument is easy to carry, reduces the working strength of user.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although with reference to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features；And these are changed or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of surrounding air bioxin sampling instrument, including host, sampling head, the flow meter assembly being tightly connected with sampling head,
Fan assembly, environment temperature sensor and the pressure flow sensor being tightly connected with flow meter assembly, the host includes shell
Body and the cavity surrounded by shell, the flow meter assembly and fan assembly setting are in the cavity；It is characterized in that：It is described
Flow meter assembly includes the drum flow meter gas chamber for erectting setting, temperature component, one is being just based on detection stream gauge gas chamber temperature
Hollow pipe and a negative pressure hollow pipe are pressed, the positive pressure hollow pipe is parallel with the negative pressure hollow pipe and is oppositely arranged up and down, and
It is plugged in the circumferential side wall of the flowmeter gas chamber, plugs position and be respectively provided with sealing element；The positive pressure hollow pipe and described negative
The inner end of pressure hollow pipe is all closed and positioned at the inside of the flowmeter gas chamber, outer end is open and is respectively positioned on the flowmeter gas chamber
It is external；The pressure port that perforation is equipped with positioned at the tube body windward side of the flowmeter plenum interior of the positive pressure hollow pipe, institute
The tube body leeward positioned at the flowmeter plenum interior for stating negative pressure hollow pipe is equipped with the pressure port of perforation；The positive pressure is empty
The outer end of core pipe is tightly connected the positive pressure pressure-tapping nozzle of the pressure flow sensor, and the outer end of the negative pressure hollow pipe is tightly connected
The negative pressure pressure-tapping nozzle of the pressure flow sensor.
2. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The positive pressure hollow pipe and described
The central axis of negative pressure hollow pipe intersects with the central axis upright of the flowmeter gas chamber.
3. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The circumferential direction of the flowmeter gas chamber
It is installed with hollow pipe fixed plate on side wall, it is solid that the outer end of the positive pressure hollow pipe and the negative pressure hollow pipe is pierced by the hollow pipe
Fixed board is simultaneously welded to connect with the hollow pipe fixed plate.
4. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The warm component of the meter includes temperature
Sensor and fixed plate, the temperature sensor are installed in the fixed plate, are set in the circumferential side wall of the flowmeter gas chamber
There is the mounting hole with the warm component cooperation of the meter, the fixed plate is installed in the circumferential side wall of the flowmeter gas chamber and described
Temperature sensor is embedded in the inside of the flowmeter gas chamber, and sealing element is arranged between the fixed plate and the mounting hole.
5. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The upper end of the flowmeter gas chamber
It is connected with mounting plate, the periphery of the mounting plate is fixed on the inner wall of the shell.
6. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The lower end of the flowmeter gas chamber
With necking part, the suction nozzle of the necking part and the fan assembly is tightly connected.
7. surrounding air bioxin sampling instrument according to any one of claim 1 to 6, it is characterised in that：The sampling
Head is integrally mounted in the cavity, and is connect with the flow meter assembly in the top of the flow meter assembly, the sampling
Head includes filter membrane component and the absorption cartridge module below filter membrane component, and the filter membrane component and the absorption cartridge module are by position
It is connected in funnel-form switching cylinder between the two, the side at the upper end edges great Kou and the filter membrane component of the funnel-form switching cylinder
Edge position is corresponding to be tightly connected, and the lower end osculum edge of the funnel-form switching cylinder and the upper end opening of the absorption cartridge module are close
The upper end of envelope connection, the lower ending opening and the flowmeter gas chamber of the absorption cartridge module is tightly connected.
8. surrounding air bioxin sampling instrument according to claim 7, it is characterised in that：It is fixed on the inner wall of the shell
There are the upper junction plate of annular, the funnel-form switching cylinder to pass through the upper junction plate and the upper end great Kou of the funnel-form switching cylinder
Overlapping edges are on the upper junction plate, the upper end sides great Kou of the edge of the filter membrane component and the funnel-form switching cylinder
Edge position is removably connected in by top opening nut on the upper junction plate.
9. surrounding air bioxin sampling instrument according to any one of claim 1 to 8, it is characterised in that：The shell
It is equipped with circumstance temperature sensor mounting hole, forced draft fans, the environment temperature sensing are installed at the circumstance temperature sensor mounting hole
Device is mounted on the air draught side of the forced draft fans.
10. surrounding air bioxin sampling instrument according to claim 1, it is characterised in that：The upper end opening of the shell,
And opening is equipped with protective cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572885.0A CN108709780A (en) | 2018-06-06 | 2018-06-06 | Surrounding air bioxin sampling instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810572885.0A CN108709780A (en) | 2018-06-06 | 2018-06-06 | Surrounding air bioxin sampling instrument |
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| Publication Number | Publication Date |
|---|---|
| CN108709780A true CN108709780A (en) | 2018-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810572885.0A Pending CN108709780A (en) | 2018-06-06 | 2018-06-06 | Surrounding air bioxin sampling instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111665100A (en) * | 2020-05-20 | 2020-09-15 | 杭州微智兆智能科技有限公司 | Long-term sampling condensate water treatment device for dioxin sampling |
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| CN206919942U (en) * | 2017-06-06 | 2018-01-23 | 江阴市神州测控设备有限公司 | A kind of adjustable fertile energy bar flowmeter |
| CN208366681U (en) * | 2018-06-06 | 2019-01-11 | 青岛海纳光电环保有限公司 | Surrounding air dioxin sampling instrument |
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|---|---|---|---|---|
| EP0129113A1 (en) * | 1983-06-10 | 1984-12-27 | Siemens Aktiengesellschaft | Device for sampling gaseous radioactive elements in the atmosphere |
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