CN109781476A - The distribution mode of VOCs detection device and its sample cover in laboratory environment - Google Patents
The distribution mode of VOCs detection device and its sample cover in laboratory environment Download PDFInfo
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- CN109781476A CN109781476A CN201910149732.XA CN201910149732A CN109781476A CN 109781476 A CN109781476 A CN 109781476A CN 201910149732 A CN201910149732 A CN 201910149732A CN 109781476 A CN109781476 A CN 109781476A
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Abstract
The invention discloses the distribution mode of VOCs detection device and its sample cover in laboratory environment, are at least made of one group of acquisition and collecting part；According to the density ratio for endangering gas and air, its sample cover is placed in the upper layer, middle layer or lower layer space of laboratory environment；Sample cover acquires sample gas；Remote control switch valve is switched on or switched off acquisition gas circuit；Sample gas is pooled to detection unit by manifold trunk；Detection unit detects the sample gas of input；Controller stores detection data, is shown, is arranged and alarmed；Due to using at least one set of acquisition and collecting part, and sample cover is located at specified spatial position according to the density ratio for endangering gas and air, the spatial position for meeting sampled point is flexibly adjustable, and acquisition is more typical and representativeness, and detection is also more acurrate reliable；Each acquisition gas circuit is controlled by controller simultaneously, is also convenient for the concentration monitor point that notes abnormalities in time, and Costco Wholesale is moderate, suits large area to popularize and uses.
Description
Technical field
The present invention relates to the application field of gaseous pollutant VOCs detection device more particularly to VOCs detection device and
Distribution mode of its sample cover in laboratory environment.
Background technique
Volatile organic compounds VOCs be atmospheric environment, working environment, indoor environment etc. main gaseous pollutant it
One, and there is stronger harmfulness to human health；Improvement and monitoring to VOCs are to improve environment, ensure that human body is strong
One of health, the important measures for improving safety in production.
Detection in relation to VOCs, detection method in the prior art is mostly gas-chromatography, gas chromatography mass spectrometry, when this method is tested
Between it is long, the Costco Wholesale of instrument and equipment is higher；Spectrophotometry can also be used to certain gases, but the parts such as formaldehyde can only be detected
Organic matter, detection range is narrow, detection time is long；And flame ionization detector, photoion then can be selected for portable instrument
Change the instrument that detector and infrared absorption detector etc. meet certain requirements, but price is still more expensive, is also not easy to real-time monitoring.
In addition, current VOCs on-line monitoring system on the market, although the concentration of VOCs, price can be monitored in real time
It is higher, it is not easy to popularize, and monitoring point is fixed, the concentration of some location point in environment can only be monitored, detection data is usually not
Representative and convincingness.
Therefore, the prior art still has much room for improvement and develops.
Summary of the invention
In view of the deficiency of the prior art, the present invention provides VOCs detection device and its sample cover in laboratory environment
In distribution mode, acquisition has typicalness and representativeness, and detection is accurate and reliable, and the concentration monitor point that can note abnormalities in time,
And Costco Wholesale is moderate.
Technical scheme is as follows: the distribution mode of VOCs detection device and its sample cover in laboratory environment,
VOCs detection device includes acquisition and collector unit, detection unit and controller；The acquisition and collector unit are at least by one group
Acquisition and collecting part composition, for the sample gas at spatial position will be specified to be pooled to detection unit in laboratory environment；Every group
Acquisition and collecting part include sample cover, remote control switch valve and manifold trunk；Wherein: according to the density ratio for endangering gas and air
The sample cover, is placed in the upper layer, middle layer or lower layer space of laboratory environment by value；The sample cover is for sky where acquiring it
Between sample gas at position；The remote control switch valve for being switched on or switched off between sample cover and manifold trunk under the control of the controller
Channel；The manifold trunk is connected to detection unit, for coupled logical sample cover sample gas collected to be pooled to inspection
Survey unit；The detection unit will test data and be transmitted to controller for detecting to the sample gas of input；The control
Device is for storing detection data, being shown, being arranged and being alarmed.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: for 50 square meters
With the laboratory environment of inner area, the acquisition and collector unit are made of 1 ~ 3 group of acquisition and collecting part.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: it is described acquisition and
Collector unit is made of 3 groups of acquisitions and collecting part, and projection of 3 sample covers on the ceiling of laboratory is set in diagonal line
It sets.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: for being greater than 50
And less than 100 square meters with the laboratory environment of inner area, the acquisition and collector unit are by 3 ~ 5 groups of acquisitions and collecting part group
At.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: it is described acquisition and
Collector unit is made of 5 groups of acquisitions and collecting part, and projection of 5 sample covers on the ceiling of laboratory is right in two intersected
Linea angulata setting, and 1 sample cover is set on crosspoint.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: for 100 square meters
The laboratory environment of the above area, the acquisition and collector unit are made of 5 ~ 20 groups of acquisitions and collecting part, multiple sample covers
Projection on the ceiling of laboratory is distributed in parallel and equally spaced ranks, and the sample cover of adjacent rows and adjacent column shifts to install
And form the oblique line of intersection.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: the sample cover
Be connected between manifold trunk via telescopic collecting pipe and universal adapting pipe, the telescopic collecting pipe connection sample cover with
Between universal adapting pipe, the universal adapting pipe connection is between telescopic collecting pipe and manifold trunk, for passing through universal adapting
The rotation of pipe cooperates the flexible of telescopic collecting pipe, the sample cover communicated therewith is located at specified spatial position.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: the detection is single
Member is made of gas chamber, VOCs sensor, air pump, detection circuit board and fixing seat；The gas chamber is in the closed semicolumn of both ends of the surface
Shape, and tip upside down in fixing seat, for mixing acquisition and each acquisition gas circuit of collector unit sample gas collected；The VOCs
Sensor is arranged in gas chamber, for combining the concentration of detection circuit board detection gas indoor VOCs；The air pump is arranged in fixation
It on seat, and is connected by detection circuit board and controller control, for being produced in each acquisition gas circuit of acquisition and collector unit
Raw negative pressure, by the sample aspiration air inlet chamber in laboratory environment；One end of the gas chamber is provided at least one intake interface, point
It Yong Yu not be connected at least one manifold trunk in acquisition and collector unit, the other end is provided with an outlet interface.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: it is described acquisition and
Collector unit and detection unit are installed in laboratory environment, and the controller is mounted on outside laboratory environment.
The distribution mode of the VOCs detection device and its sample cover in laboratory environment, in which: the laboratory
Environment is colleges and universities and scientific research institutions, chemical laboratory, Chemical Engineering Laboratory, gas cylinder room, reagent chamber, instrument room, analysis pre-treatment room
Or the environment of chemical research and development room.
The distribution mode of VOCs detection device provided by the present invention and its sample cover in laboratory environment, due to using
At least one set of acquisition and collecting part, and the sample cover that is communicated therewith according to the density ratio for endangering gas and air is positioned
At specified spatial position, the spatial position for meeting sampled point is flexibly adjustable, and acquisition is more typical and representative, inspection
It surveys also more acurrate reliable；Each acquisition gas circuit is controlled by controller simultaneously, is also convenient for the concentration that notes abnormalities in time
Monitoring point, and Costco Wholesale is moderate, suits large area to popularize and uses.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses；Shape and proportional sizes of each component in figure etc. are only schematically, to be used to help the understanding of the present invention, are not tools
Body limits the shape and proportional sizes of each component of the present invention；Those skilled in the art under the teachings of the present invention, can basis
Concrete condition selects various possible shapes and proportional sizes to implement the present invention.
Fig. 1 is the distribution mode signal of VOCs detection device and its sample cover embodiment of the present invention in analysis room environmental
Figure；
Fig. 2 is the enlarged structure schematic diagram of the sampling and collecting part of single group used in VOCs detection device embodiment of the present invention；
Fig. 3 is the enlarged structure schematic diagram of detection unit used in VOCs detection device embodiment of the present invention；
Fig. 4 is the front enlarged diagram of VOCs detection device embodiment controller used thereby of the present invention；
Fig. 5 is the distribution mode schematic diagram of VOCs detection device and its sample cover embodiment of the present invention in reagent room environmental；
Fig. 6 is the distribution mode schematic diagram of VOCs detection device and its sample cover embodiment of the present invention in gas cylinder room environmental；
Fig. 7 is that the vertical view of the distribution mode embodiment one of VOCs detection device of the present invention and its sample cover in laboratory environment is shown
It is intended to；
Fig. 8 is the stereoscopic schematic diagram of Fig. 7 of the present invention；
Fig. 9 is that the vertical view of the distribution mode embodiment two of VOCs detection device of the present invention and its sample cover in laboratory environment is shown
It is intended to；
Figure 10 is the vertical view of the distribution mode embodiment three of VOCs detection device of the present invention and its sample cover in laboratory environment
Schematic diagram；
Each label in figure: acquisition and collector unit 100, sample cover 110, remote control switch valve 120, telescopic collecting pipe 130, universal
Transfer tube 140, manifold trunk 150, detection unit 200, gas chamber 210, intake interface 211, outlet interface 212, VOCs sensor
220, fixing seat 230, controller 300, display screen 310, up and down key 320, indicator light 330.
Specific embodiment
Below with reference to attached drawing, a specific embodiment of the invention and embodiment are described in detail, described tool
Body embodiment only to explain the present invention, is not intended to limit a specific embodiment of the invention.
Laboratory environment herein includes but is not limited to colleges and universities and scientific research institutions, chemical laboratory, Chemical Engineering Laboratory, gas
The environment such as bottle room, reagent chamber, instrument room, analysis pre-treatment room, chemical research and development room.
As shown in Figure 1, Fig. 1 is the distribution of VOCs detection device and its sample cover embodiment of the present invention in analysis room environmental
Schematic diagram；The VOCs detection device includes acquisition and collector unit 100, detection unit 200 and controller 300；It is described to adopt
Collection and collector unit 100 are at least made of one group of acquisition and collecting part, are used for designated space in laboratory environment to be monitored
Sample gas at position is pooled to detection unit 200；Fig. 1, which is illustrated only, to be formed acquisition by three groups of acquisitions and collecting part and is collected single
The group number of the acquisition used of the embodiment of member 100, the acquisition and collector unit 100 and collecting part can be according to laboratory to be monitored
The face of (such as diagram width 4m × long 8m × analysis room high 2.5m, the dotted line frame of width 1.4m indicate the zone of action of staff)
Product size and field condition determine, to can correctly reflect the concentration level of the Laboratory Air pollutant；The detection
Unit 200 will test data and be transmitted to controller 300 for detecting to the sample gas of input；The controller 300 is arranged
There are control circuit board, plug-in storage chip, display screen, operation button and a sound-light alarm component, in the control circuit board
Setting be data show and processing circuit, including microcontroller chip (such as MSP430FE4272IPM), and with its circuit connection
Data storage SD card circuit, liquid crystal display screen controller (such as ILI9341), key-press matrix circuit, valve control signal connect
Mouth circuit, sensor signal interface circuit, indicator light circuit, sound-light alarm interface circuit, for being stored to detection data,
It has been shown that, setting and alarm.
As shown in connection with fig. 2, Fig. 2 is the amplification of the sampling and collecting part of single group used in VOCs detection device embodiment of the present invention
Structural schematic diagram；Every group of acquisition and collecting part include sample cover 110, remote control switch valve 120 and manifold trunk 150；It is described to adopt
Sample gas where sample cover 110 is used to acquire it at laboratory environment spatial position；The remote control switch valve 120 is used in controller
It is switched on or switched off the channel between sample cover 110 and manifold trunk 150 under 300 control；The other end of the manifold trunk 150 is connected to
To detection unit 200, for the coupled logical sample gas collected of sample cover 110 to be pooled to detection unit 200.
It is preferred that via telescopic collecting pipe 130 and universal adapting pipe between the sample cover 110 and manifold trunk 150
140 are connected, and the telescopic connection of collecting pipe 130 is between sample cover 110 and universal adapting pipe 140, the universal adapting
Pipe 140 is connected between telescopic collecting pipe 130 and manifold trunk 150, and for passing through the rotation of universal adapting pipe 140, cooperation is stretched
Stretching for contracting formula collecting pipe 130, the sample cover 110 communicated therewith is located at specified spatial position；By adjustable
Sample gas pipeline, the height of flexible modulation sample cover 110 make every effort to detect the maximum concentration that gas is endangered in laboratory environment
Point.
Specifically, the sample cover 110 is funnel-shaped, its oral area is downward after mounting or obliquely downward is arranged, oral area
Diameter 10cm, the tail portion internal diameter 0.3cm being connected with telescopic collecting pipe 130.
Specifically, the remote control switch valve 120 is connected to the tail portion of sample cover 110 and the head of telescopic collecting pipe 130
Between；The remote control switch valve 120 both can be set in the tail portion of sample cover 110, also can be set in telescopic collecting pipe 130
Head.
It is preferred that being provided with the infrared signal transmission circuit with microcontroller chip circuit connection in the control circuit board
(such as HS0038A2D), the controller 300 by the unlatching of the infrared signal transmission circuit control remote control switch valve 120 or
It closes, it is possible thereby to be connected without going through conducting wire, avoids and the aesthetic feeling of laboratory internal environment is impacted, installation and debugging
It is simpler, it is not only suitable for being mounted on the situation in the same space, while being more suitable for the case where being mounted on different spaces, such as will
Controller 300 is mounted on the case where laboratory environment outer (such as on gate sidewall face)；Because no staff activity (such as
Gas cylinder room) space environment in, acquisition and collector unit 100, detection unit 200 are installed in gas cylinder chamber interior, and will control
Device 300 processed is mounted on except gas cylinder room, ensure that staff can easily and safely check gas cylinder in the outside of gas cylinder room
Hazardous material concentration level in chamber interior environment, so can accurate judgement whether can enter gas cylinder room safely.
It is preferred that the telescopic collecting pipe 130 is connected in sequence by the different tube coupling of the above thickness of three sections, and compared with
Thin tube coupling can be inserted it is among neighbouring thicker tube coupling and coupled, to adjust entire telescopic collecting pipe as needed
130 length.
By taking the telescopic collecting pipe 130 being connected in sequence by the different tube coupling of four section thicknesses as an example, most tubule section is interior
Diameter is connected with 110 tail portion of sample cover, and the internal diameter of the two is identical；The most internal diameter of extra heavy pipe section is connected with the manifold trunk 150
It connects, the internal diameter of the two is also identical.
Specifically, the internal diameter of this four sections tube coupling is from carefully to being slightly followed successively by 0.3cm, 0.4cm, 0.5cm and 0.6cm；Meanwhile institute
The internal diameter for stating manifold trunk 150, which is preferably also, selects 0.6cm, and during installation, the manifold trunk 150 can be fixed on reality by pipe clamp
It tests on the ceiling of room.
As shown in connection with fig. 3, Fig. 3 is the enlarged structure signal of detection unit used in VOCs detection device embodiment of the present invention
Figure, the detection unit 200 by gas chamber 210, VOCs sensor 220, air pump (not shown go out), detection circuit board (not shown go out) and
Fixing seat 230 forms；The gas chamber 210 is in the closed semi-cylindrical form of both ends of the surface, and is tipped upside down in fixing seat 230, for mixing
Close acquisition and each acquisition gas circuit sample gas collected of collector unit 100；The VOCs sensor 220 is arranged in gas chamber 210,
For combining the concentration of VOCs in detection circuit board detection gas chamber 210；The air pump is arranged in fixing seat 230, and passes through inspection
Slowdown monitoring circuit plate and the control of controller 300 connect, for generating negative pressure in each acquisition gas circuit of acquisition and collector unit 100,
To realize the quick detection to VOCs concentration in laboratory environment gas for the sample aspiration air inlet chamber 210 in laboratory environment；Institute
The one end for stating gas chamber 210 is provided at least three intake interfaces 211, be respectively used to acquisition and collector unit 100 at least
Three manifold trunks 150 are connected, and the other end is provided with an outlet interface 212.
Specifically, the long 6cm of gas chamber, radius 2.5cm, outlet interface outer diameter 0.6cm, intake interface outer diameter 0.4cm, and
With corresponding nut, it is sealed in order to which nut can be used in the intake interface not used.
It is preferred that the VOCs sensor 220 uses import photoionization (PID) VOCs sensor, not only in response to it is fast,
Accuracy is high, and not will receive the influence of oxygen concentration in sample gas, in most suitable laboratory and other working environments
The quick detection of VOCs；Meanwhile according to the concentration level of VOCs in laboratory environment gas, it can be selected by controller 300
Different ranges makes its minimum resolution reach 1ppb.
It is preferred that the small air pump of air pump selection flow speed stability, gas flow rate control 0.5 ~ 1.0L/min it
Between, in order to be used for quickly detecting to the VOCs concentration in laboratory environment gas；By taking the gas production flow velocity of 0.5L/min as an example,
The pipeline of 200cm long takes around 3 ~ 4min in stable reading.
It is preferred that temperature and moisture sensors are additionally provided in the gas chamber 210, for combining detection circuit board real
When monitoring laboratory environment in temperature and humidity.
Specifically, being provided with power supply, control and signal circuit, including power-switching circuit in the detection circuit board
At (such as TPS63000 of the TPS5420 and output DC3.3V of output DC5V), power supply and output interface circuit, sensor signal
Manage circuit (such as TCL2252IDR), EEPROM storage circuit, valve control interface, valve control signal interface circuit,
Humiture transducer interface circuit, pump control interface, sound-light alarm interface circuit, RS485 output interface circuit (such as
MAX1487ESA), 2 interface circuit of 4 ~ 20mA output interface circuit (such as AD5420AREZ) and 1 plate of plate.
It is preferred that being additionally provided with the first nothing being connected with above-mentioned each interface and processing circuit in the detection circuit board
Line data transmission module (such as WiFi/ Bluetooth communication modules IntoRobot-W32), correspondingly, the control of the controller 300
It is provided in circuit board and the second wireless data transfer module of microcontroller chip circuit connection (such as WiFi/ Bluetooth transmission mould
Block IntoRobot-W32), for being communicated wirelessly between detection unit and controller 300, including by VOCs concentration, adopt
The data such as gas velocity, temperature and humidity are transmitted to controller 300, and will setting VOCs transducer range, adjustment air pump gas production
The control instructions such as flow velocity, controlled valve are transmitted to detection unit.
As shown in connection with fig. 4, Fig. 4 is the front enlarged diagram of VOCs detection device embodiment controller used thereby of the present invention,
Specifically, the controller 300 is in the rectangular shape with fillet, the high 20cm of outer dimension, width 15cm, thickness 4cm, indicator light
330 are arranged in the top of display screen 310, and the lower section of display screen 310 is arranged in operation button；The indicator light includes infrared (IR)
State, alarm (Alarm) state and error condition (Fault) indicator light；The operation button include switch key, Menu key, really
Recognize key, return key, cancel key, school zero key, aligning key, low report key, Gao Baojian, storage key, time key, delete key, temperature alarming
Key, restores factory key, control acquisition and the remote control switch valve 120 in each acquisition gas circuit of collector unit 100 at humidity alarm key
Control key and up and down key 320；The display screen 310 is for showing current date and time, temperature and humidity, VOCs concentration
Value, acquisition and each switch state for acquiring the remote control switch valve 120 in gas circuit of collector unit 100；And why not the present invention
Display function is set in detection unit 200, then is to save design and producing cost.
Specifically, in 300 control circuit board of controller: sensor signal interface circuit and the second wireless data pass
Defeated modular circuit connection, and the sensor signal interface circuit includes the interface circuit of RS485 signal and 4 ~ 20mA signal；Instruction
Circuit for lamp includes infrared (IR) state, alarm (Alarm) state and error condition (Fault) indicator light；Sound-light alarm interface electricity
Road includes the sound-light alarm interface circuit of temperature and humidity, air pump.
It is preferred that it is also stored with compound correction database in the plug-in storage chip, the compound correction number
The correction coefficient that can provide 300 multiple compounds according to library, for according to the response of the different compounds of 220 pairs of VOCs sensor not
Together, the correction coefficient of different compounds is targetedly set by controller 300, so that the measurement result of different measured matters
It is more accurate and reliable；In addition, every half a year calibrate once, to guarantee the accurate and reliable of measurement result to VOCs sensor.
In the specific embodiment of the distribution mode of VOCs detection device of the present invention and its sample cover in laboratory environment
In, it can be according to the actual conditions and monitoring purpose of monitored laboratory environment, selection acquisition and collector unit 100, detection are single
The space installation site of member 200 and controller 300.
It, can will for there is staff often in movable laboratory or working environment (such as analysis room shown in FIG. 1)
Controller 300 and acquisition and collector unit 100, detection unit 200 are all mounted in the same space of the analysis room, in order to work
Make personnel and understands the concentration for endangering gas in laboratory environment, and the security level of real-time awareness site environment in time.
As shown in connection with fig. 5, Fig. 5 is point of VOCs detection device and its sample cover embodiment of the present invention in reagent room environmental
Mode for cloth schematic diagram；Or by taking the acquisition being made of three groups of acquisitions and collecting part and collector unit 100 as an example, do not have for this
There are staff often movable laboratory or working environment, will acquire and collector unit 100 and detection unit 200 are all installed
It in the case where in reagent chamber's the same space, needs for controller 300 to be mounted on except reagent chamber, such as is mounted on the side Qi Men handle
On the metope of hand side, to guarantee that the staff outside monitoring space can easily and safely check that the hazardous material in monitored space is dense
Degree is horizontal, and then can energy accurate judgement staff enter interior activity.
As shown in connection with fig. 6, Fig. 6 is point of VOCs detection device and its sample cover embodiment of the present invention in gas cylinder room environmental
Mode for cloth schematic diagram；Equally by taking the acquisition being made of three groups of acquisitions and collecting part and collector unit 100 as an example, equally, for
It is this there is no staff often movable laboratory or working environment, it will acquire and collector unit 100 and detection unit 200
In the case where being all mounted in the same space of gas cylinder room, it is also desirable to controller 300 is mounted on except gas cylinder room, such as be mounted on
On the metope of the side Qi Men handle side, to guarantee that the staff outside monitoring space can easily and safely check monitored space
Hazardous material concentration level, and then can energy accurate judgement staff enter interior activity.
In the specific embodiment of the distribution mode of VOCs detection device of the present invention and its sample cover in laboratory environment
In, the quantity and cloth point of sample cover 110 can be reasonably selected according to the size and field condition of laboratory area to be monitored
It sets.
In conjunction with shown in Fig. 7 and 8, Fig. 7 is the distribution of VOCs detection device of the present invention and its sample cover in laboratory environment
The schematic top plan view of mode embodiment one, Fig. 8 are the stereoscopic schematic diagrams of Fig. 7 of the present invention；(50 are contained within 50 square meters for area
Square meter) small-size laboratory S, the acquisition and collector unit 100 can be made of 1 ~ 3 group of acquisition and collecting part, and Fig. 7 and 8 is only
The embodiment of 3 sample covers 110 is shown, and this projection of 3 sample covers 110 on small-size laboratory S ceiling is in diagonal
Line setting, so that the environment sample gas of acquisition is more representative.
3 sample covers 110 can cover the small-size laboratory S surrounding air within 50 square meter areas substantially, if according to every
The flow rate calculation of a acquisition gas circuit 0.5L/min, then 3 unified overall flow rates for entering gas chamber 210 of acquisition cover 110 can reach 1.5L/
Min, it is possible thereby to the gas in laboratory environment is quickly poured gas chamber 210, when response to accelerate VOCs sensor 220
Between.
The area of the Chemical Engineering Laboratories such as usual reagent chamber, storage room, sample room, gas cylinder room mostly within 50 square meters, and
And reagent, sample of this kind of laboratory storage etc. is more, the component of environmental gas is more, and property is different；For this purpose, according to small-sized reality
The physical property difference for endangering gas in the S environment of room is tested, different sample modes can be used: being less than the harm of air for density
Gas can be used upper layer sample mode, i.e., sample cover 110 is placed in the upper space of small-size laboratory S；Sky close for density
The harm gas of gas can be used middle layer sample mode, i.e., sample cover 110 is placed in the middle space of small-size laboratory S；For close
Degree is greater than the harm gas of air, and lower layer's sample mode can be used, i.e., the lower layer for sample cover 110 being placed in small-size laboratory S is empty
Between；And it is all existing for the harm gas of several density endanger environment, then mixing sample mode can be used, i.e., sample 3
Cover 110 is respectively placed in the upper, middle and lower space of small-size laboratory S；3 sample covers can be at any time according to scene as a result,
The variation of environment carries out the adjustment at (upwards, downward, middle part), is endangered with reaching in comprehensive monitoring small-size laboratory S surrounding air
The purpose of object concentration.
As shown in connection with fig. 9, Fig. 9 is the distribution mode of VOCs detection device of the present invention and its sample cover in laboratory environment
The schematic top plan view of embodiment two；50 are greater than for area and less than the medium lab M within 100 square meters, the acquisition and
Collector unit 100 can be made of 5 groups of acquisitions and collecting part, and Fig. 9 illustrates only the embodiment of 5 sample covers 110,5 samplings
1 sampling is arranged in the two diagonal lines setting intersected in the projection covered on medium lab M ceiling on crosspoint
Cover, so that the environment sample gas of acquisition is more representative.
5 sample covers 110 can cover the medium lab M surrounding air within 50 ~ 100 square meter areas substantially, if pressing
According to the flow rate calculation of each acquisition gas circuit 0.5L/min, then 5 unified overall flow rates for entering gas chamber 210 of acquisition cover 110 can reach
2.5L/min, increased two-way acquisition gas circuit can offset increased lab space and acquire the delay in gas circuit, thus may be used
The gas in laboratory environment is quickly poured gas chamber 210, and accelerate the response time of VOCs sensor 220.
Similarly, different according to the physical property for endangering gas in medium lab M environment, different sampling sides can be used
It is less than the harm gas of air for density, upper layer sample mode can be used, i.e., 5 sample covers 110 are all placed in medium-sized reality likes:
Test the upper space of room M；For density close to the harm gas of air, middle layer sample mode can be used, i.e., by 5 sample covers
110 are all placed in the middle space of medium lab M；It is greater than the harm gas of air for density, lower layer's sample mode can be used,
5 sample covers 110 are all placed in the lower layer space of medium lab M；And it is all existing for the harm gas of several density
Environment is endangered, then mixing sample mode can be used, i.e., 5 sample covers 110 are respectively placed in the upper layer of medium lab M, middle layer
And lower layer space；As a result, 5 sample covers can variation at any time depending on the site environment carry out the tune of (upwards, downwards, middle part)
It is whole, to achieve the purpose that hazardous material concentration in comprehensive monitoring medium lab M surrounding air.
As shown in connection with fig. 10, Figure 10 is the distribution side of VOCs detection device of the present invention and its sample cover in laboratory environment
The schematic top plan view of formula embodiment three；For the large-scale experiment room L that area (contains 100 square meters) more than 100 square meters, the acquisition
It can be made of 5 ~ 20 groups of acquisitions and collecting part with collector unit 100, Figure 10 illustrates only the embodiment of 10 sample covers 110,
This projection of 10 sample covers 110 on large-scale experiment room L ceiling is in parallel and equally spaced ranks distribution, adjacent rows and phase
The sample cover 110 of adjacent column shifts to install and is formed the oblique line of intersection, so that the environment sample gas of acquisition is more representative.
It is preferred that multiple sample covers 110 should avoid ventilation opening when layouting, and it should be greater than 0.5m with a distance from wall；
And the distance between adjacent two sample cover 110 should control within 2m；If being arranged by this principle, large-scale experiment room L's
Still there is the region that do not layout in environment space, then layout further according to first two situation.
Equally, different according to the physical property for endangering gas in large-scale experiment room L environment, different sampling sides can be used
It is less than the harm gas of air for density, upper layer sample mode can be used, i.e., 10 sample covers 110 are all placed in large size likes:
The upper space of laboratory L；For density close to the harm gas of air, middle layer sample mode can be used, i.e., sample 10
Cover 110 is all placed in the middle space of large-scale experiment room L；It is greater than the harm gas of air for density, lower layer's sampling side can be used
10 sample covers 110 are all placed in the lower layer space of large-scale experiment room L by formula；And the harm gas of several density is all deposited
Harm environment, then can be used mixing sample mode, i.e., by 10 sample covers 110 be respectively placed in large-scale experiment room L upper layer,
Middle layer and lower layer space；The variation progress (upwards, downward, middle part) that 10 sample covers can at any time depending on the site environment as a result,
Adjustment, to achieve the purpose that hazardous material concentration in comprehensive monitoring large-scale experiment room L surrounding air.
The distribution mode of VOCs detection device provided by the present invention and its sample cover in laboratory environment, multichannel are set
It counts, rotate freely, flexible modulation and control, detection time is short, speed is fast, result is scientific accurate, and it is easy to use, can effectively it reflect
The actual concentration of volatile organic compounds VOCs in laboratory environment, sampling have typicalness and representativeness, easy for installation, inspection
Survey quick and precisely, price material benefit, it is practical, be suitble in colleges and universities and scientific research institutions, chemical laboratory, Chemical Engineering Laboratory, gas cylinder
It is popularized in an all-round way and is popularized in the laboratories such as room, reagent chamber, instrument room, analysis pre-treatment room, chemical research and development room.
It should be understood that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not sufficient to limit of the invention
Technical solution within the spirit and principles in the present invention, can add according to the above description for those of ordinary skills
With increase and decrease, replacement, transformation or improvement, and all these increases and decreases, replacement, transformation or improved technical solution, it all should belong to this
The protection scope of invention appended claims.
Claims (10)
- The distribution mode of 1.VOCs detection device and its sample cover in laboratory environment, VOCs detection device include acquisition and receive Collect unit, detection unit and controller, it is characterised in that: the acquisition and collector unit are at least by one group of acquisition and collecting part Composition, for the sample gas at spatial position will be specified to be pooled to detection unit in laboratory environment；Every group of acquisition and collecting part It include sample cover, remote control switch valve and manifold trunk；Wherein: according to the density ratio for endangering gas and air, by the sampling Cover is placed in the upper layer, middle layer or lower layer space of laboratory environment；Sample where the sample cover is used to acquire it at spatial position Gas；The remote control switch valve is used for the channel being switched on or switched off between sample cover and manifold trunk under the control of the controller；It is described Manifold trunk is connected to detection unit, for coupled logical sample cover sample gas collected to be pooled to detection unit；It is described Detection unit will test data and be transmitted to controller for detecting to the sample gas of input；The controller is used for inspection Measured data is stored, is shown, is arranged and alarmed.
- 2. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: for 50 square meters with the laboratory environment of inner area, the acquisition and collector unit are by 1 ~ 3 group of acquisition and collecting part Composition.
- 3. the distribution mode of VOCs detection device according to claim 2 and its sample cover in laboratory environment, special Sign is: the acquisition and collector unit are made of 3 groups of acquisitions and collecting part, and 3 sample covers are on the ceiling of laboratory Projection in diagonal line be arranged.
- 4. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: for being greater than 50 and less than 100 square meters with the laboratory environment of inner area, the acquisition and collector unit are by 3 ~ 5 groups Acquisition and collecting part composition.
- 5. the distribution mode of VOCs detection device according to claim 4 and its sample cover in laboratory environment, special Sign is: the acquisition and collector unit are made of 5 groups of acquisitions and collecting part, and 5 sample covers are on the ceiling of laboratory 1 sample cover is arranged in the two diagonal lines setting intersected in projection on crosspoint.
- 6. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: the laboratory environment of the area above for 100 square meters, and the acquisition and collector unit are by 5 ~ 20 groups of acquisitions and collection portion Part composition, projection of multiple sample covers on the ceiling of laboratory is in the distribution of parallel and equally spaced ranks, adjacent rows and adjacent The sample cover of column shifts to install and forms the oblique line of intersection.
- 7. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: it is connected between the sample cover and manifold trunk via telescopic collecting pipe and universal adapting pipe, the telescopic receipts Header in communication between sample cover and universal adapting pipe, universal adapting pipe connection telescopic collecting pipe and manifold trunk it Between, for the rotation by universal adapting pipe, cooperates the flexible of telescopic collecting pipe, the sample cover communicated therewith is located in finger At fixed spatial position.
- 8. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: the detection unit is made of gas chamber, VOCs sensor, air pump, detection circuit board and fixing seat；The gas chamber is in two The closed semi-cylindrical form in end face, and tip upside down in fixing seat, it is adopted for mixing acquisition and each acquisition gas circuit of collector unit The sample gas of collection；The VOCs sensor is arranged in gas chamber, for combining the concentration of detection circuit board detection gas indoor VOCs；Institute It states air pump to be arranged in fixing seat, and passes through detection circuit board and controller control connection, in acquisition and collector unit Negative pressure is generated in each acquisition gas circuit, by the sample aspiration air inlet chamber in laboratory environment；One end of the gas chamber be provided with to A few intake interface is respectively used to be connected at least one manifold trunk in acquisition and collector unit, and the other end is provided with One outlet interface.
- 9. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: the acquisition and collector unit and detection unit are installed in laboratory environment, and the controller is mounted on experiment Outside room environmental.
- 10. the distribution mode of VOCs detection device according to claim 1 and its sample cover in laboratory environment, special Sign is: the laboratory environment is colleges and universities and scientific research institutions, chemical laboratory, Chemical Engineering Laboratory, gas cylinder room, reagent chamber, instrument The environment of device room, analysis pre-treatment room or chemical research and development room.
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| CN116907923A (en) * | 2023-07-11 | 2023-10-20 | 中国农业大学 | Gas uniform sampling system of human body energy metabolism bin |
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Application publication date: 20190521 |