CN207730537U - A kind of sack method VOC pretreating devices - Google Patents
A kind of sack method VOC pretreating devices Download PDFInfo
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- CN207730537U CN207730537U CN201721757844.6U CN201721757844U CN207730537U CN 207730537 U CN207730537 U CN 207730537U CN 201721757844 U CN201721757844 U CN 201721757844U CN 207730537 U CN207730537 U CN 207730537U
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Abstract
The utility model is related to VOC to handle monitoring technical field, more particularly to a kind of sack method VOC pretreating devices, including processing unit, control device, inlet channel and exhaust passage, processing unit includes heater box, sampler bag, sampler bag is not less than 2, and sampler bag is placed in heater box and is connect respectively with pressure sensor, inlet channel and exhaust passage by gas path device；The inlet channel includes gas source interface, gas purifier, MFC1, solenoid valve successively, and the exhaust passage includes vacuum pump, buffer, the VOC detectors and MFC2 and solenoid valve that solenoid valve and solenoid valve are connected in parallel successively；Control device includes PLC controller, relay, touch screen, wireless communication apparatus, solves present in prior art problem the technological deficiency that sack method monitoring device the degree of automation is low, sampler bag is easily broken, can not calculate sample dead volume and can not handle multiple exemplars simultaneously.It provides a kind of with automatic control, telecommunication alarm and the utility model for monitoring multiple exemplars simultaneously.
Description
Technical field
The utility model is related to VOC pre-treatments to monitor field, and in particular to a kind of sack method VOC pretreating devices.
Background technology
With the continuous improvement of people's living standards, the harm of hazardous contaminant matter has caused people in daily life
Common concern, aldehyde ketone substance, the VOC etc. that wherein auto parts and components distribute are the main sources of automobile indoor air pollution, dirty
Dye object is exceeded to have become a key factor for influencing health of people.Auto parts and components VOC detections at this stage mainly use sack
Method detects, and national departments concerned is in the examination criteria for drafting parts VOC.Its operation principle is as follows：It is to put sample to be measured
In the TEDLAR sampler bags for entering certain specification, the sampler bag itself requires not containing VOC, and the sampler bag of sealing is accurately filled one
Quantitative nitrogen puts it into baking oven and is heated under defined temperature and time, is sampled with Tenax pipes and DNPH pipes,
Effective thermal desorption-the gas mass spectrometries of Tenax are measured, the effective acetonitriles of DNPH eluted after with liquid chromatograph to elution
Liquid is tested.
Test device currently on the market is primarily present following defect：One, personal monitoring and control are needed, is consumed a large amount of
Man power and material；Two, the fixing fabric structure precision for being filled with gas is not high, does not meet the requirement of experiment；Three, the heating of Laboratory Module is set
Standby also relatively simple, temperature program cannot effectively control temperature uniformity and stability, and sampler bag is easy cleaning and inflating
It ruptures in the process；Four, the VOC content of multiple exemplars can not be monitored simultaneously；Five, the dead volume of exemplar can not be calculated.
Utility model content
For present in prior art problem, sack method monitoring device the degree of automation is low, sampler bag is easily broken, nothing
Method calculates the dead volume of exemplar and can not monitor the technological deficiency of multiple exemplars simultaneously.The utility model provides a kind of new bag
Sub- method VOC pretreating devices, the sack method VOC pretreating devices and its application method have automatic control, telecommunication
Alarm and the performance for monitoring multiple exemplars simultaneously.
The purpose of this utility model is achieved through the following technical solutions：
A kind of sack method VOC pretreating devices, including processing unit, control device, inlet channel and exhaust passage,
The processing unit includes heater box, sampler bag, and the sampler bag is more than or equal to 2, and the sampler bag is placed on
It is connect respectively with pressure sensor, inlet channel and exhaust passage in heater box and by gas path device；
The inlet channel successively include gas source interface, gas purifier, MFC1, solenoid valve, the exhaust passage according to
Secondary includes vacuum pump, buffer, the VOC detectors and MFC2 and solenoid valve that solenoid valve and solenoid valve are connected in parallel；
The control device includes PLC controller, relay, touch screen, wireless communication apparatus.
As a further improvement, multiple gas path device interfaces are provided on the sampler bag.
As a further improvement, the output end of the PLC is electrically connected with touch screen, communication device input terminal, and PLC's is defeated
Enter end with pressure sensor, solenoid valve, heater box, gas source interface, gas purifier and MFC to be connected, the PLC controller
It is also associated with buzzer warning device.
As a further improvement, the wireless communication apparatus include connect with exterior terminal equipment transmission AIR200 it is short
T unit.
Compared with prior art, the beneficial effects of the utility model are：
Effect one, the processing unit of the utility model include heater box, sampler bag, and the quantity of sampler bag is not less than 2, and
It is connect respectively with pressure sensor, inlet channel and exhaust passage by gas path device.Multiple numbers of channels are arranged in processing unit,
The sample that 2 or more can be handled simultaneously, greatly saves processing time；
Effect two, the utility model are provided with multiple gas path device interfaces on sampler bag, in addition to can with it is external into
Device of air and exhaust apparatus unicom, can also with connect pressure sensor, while the output end of pressure sensor is connected to PLC
Together, when the pressure in sampler bag is excessive, it can be automatically performed detection, prevent sampler bag from being damaged because pressure is excessive
It is bad；
Effect three, the utility model are connect using PLC controller come control pressure sensor, solenoid valve, heater box, gas source
Mouthful, gas purifier and touch screen, realize the automatic control of processing unit, reduce artificial during traditional detection
Cost greatly shortens the time, saves cost；
Effect four, the utility model is provided with wireless communication apparatus, can be with remote control sack method pretreating device, in real time
Maintenance device exception, abnormal short breath is transferred to formulation by the AIR200 short message apparatus that transmission is connect with exterior terminal equipment
Mobile terminal；
Effect five, the utility model can detect exemplar dead volume automatically.Traditional sack method VOC testing principles are by sample
Part is put into the sampler bag of certain specification, remaining gas is exhausted with vacuum pump, then be accurately filled with a certain amount of gas, because not
There are certain dead angles for the exemplar of rule, so the gas of residual fraction can not be exhausted completely, may result in sack in an experiment
In the control accuracy of volume of gas have error to influence the concentration of sample, and then influence the accuracy of testing result.Institute
It is particularly important with the dead volume for detecting exemplar before monitoring volume；
Effect six, the utility model are provided with warning device, including buzzer fault alarm, can be simultaneously to sampler bag pressure
Power is excessive, reveal and flow of aerating air deviation is alarmed, and staff is facilitated to be adjusted in time to abnormal conditions.
Description of the drawings
Fig. 1 is the utility model overall structure block diagram；
Fig. 2 is the table of the sampler bag A and sampler bag B work relationships of embodiment；
In figure, 1- heater boxes, 2- sampler bags A, 3- sampler bag B, 4- gas path device, 5- solenoid valves 1,6- solenoid valves 2,7- electricity
Magnet valve 3,8- solenoid valves 4,9- solenoid valves 5,10- solenoid valves 6,11- solenoid valves 7,12- pressure sensors, 13-VOC detectors,
14-MFC2,15- buffer, 16- vacuum pumps, 17-MFC1,18- gas purifiers, 19- gas source interfaces, 20-PLC controllers.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment be only the utility model a part of the embodiment, instead of all the embodiments.Usually here described in attached drawing
It can be arranged and design with a variety of different configurations with the component of the utility model embodiment shown.Therefore, below to
The detailed description of the embodiments of the present invention provided in attached drawing is not intended to limit the model of claimed the utility model
It encloses, but is merely representative of the selected embodiment of the utility model.Based on the embodiments of the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of not making creative work, shall fall within the protection scope of the present invention.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for description purposes only, and are not understood to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
The utility model is further described in detail below through specific implementation examples and in conjunction with the accompanying drawings.
Embodiment
The present embodiment provides a kind of sack method VOC pretreating devices, as shown in Figure 1, being the utility model overall structure frame
Figure, including processing unit, control device, inlet channel and exhaust passage,
The processing unit includes heater box 1, sampler bag, and the sampler bag quantity of the present embodiment is 2, respectively sampler bag
A2 and sampler bag B3, the sampler bag A2 and sampler bag B3 are placed in heater box 1 and are passed respectively with pressure by gas path device 4
Sensor 12, inlet channel and exhaust passage connect；There are two gas path device interfaces for setting on sampler bag A2, and one passes through solenoid valve
6-10 is connect with pressure sensor 12, another by solenoid valve 1-5 solenoid valves 4-8 respectively with inlet channel and exhaust passage
Connection；Sampler bag B3 is also provided with there are two gas path device interface, and one is connect by solenoid valve 5-9 with pressure sensor 12, separately
Outer one is connect with inlet channel and exhaust passage respectively by solenoid valve 2-6 and solenoid valve 3-7；The solenoid valve 1-5 and electricity
Magnet valve 2-6 accesses gas path device and is connected with MFC1-17, gas purifier 18, gas source interface 19 jointly, the solenoid valve 7-
Access VOC detectors 13 and MFC214 in parallel on 11.
The inlet channel includes gas source interface 19, gas purifier 18, MFC117, solenoid valve, the exhaust successively
Channel includes vacuum pump 16, buffer 15 successively, solenoid valve, the VOC detectors 13 being connected in parallel with solenoid valve and MFC2-14 with
And solenoid valve；
The control device includes PLC controller 20, relay, touch screen, wireless communication apparatus.
As a further improvement, 4 interface of multiple gas path devices is provided on the sampler bag.
As a further improvement, the output end with touch screen, communication device input terminal of the PLC controller 20 are electrically connected
It connects, input terminal and pressure sensor 12, solenoid valve, heater box 1, gas source interface 19, the gas purifier 18 of PLC controller 20
It is connected with MFC, the PLC controller 20 is also associated with buzzer warning device.
As a further improvement, the wireless communication apparatus include connect with exterior terminal equipment transmission AIR200 it is short
T unit.
As shown in Fig. 2, the table of the sampler bag A and sampler bag B work relationships for embodiment, list solenoid valve and exist respectively
Aging, leak detection, cleaning, inflation and monitor dead volume process switch conditions.It provides in the present embodiment before sack method VOC
Application method is handled, is included the following steps：
S1 sack aging methods：It opens heater box and carries out sampler bag heated baking, PLC controller is opened according to the volume of setting
Open " sampler bag A（B）Inflation " program.After being heated to setting time, " sampler bag A is opened（B）VOC detection " program.When VOC is examined
When measured value is not up to requirement of experiment value, cycle opens " sampler bag A（B）Pumping " and " sampler bag A（B）Inflation " is examined until VOC
Measured value reaches requirement, is automatically performed sampler bag A（B）Aging；
S2 leak hunting methods：
（1）Negative pressure leakage detection：PLC opens " sampler bag A（B）Negative pressure leakage detection pattern ", sampler bag A to be checked（B）It is extracted into and sets
Fixed negative pressure value, vacuum pump are stopped, and PLC reads pressure sensor numerical value and starts timing, when timer arrival is preset
After time, the pressure value after the completion of reading behind slip side, by the way that sack slip is calculated, to judge whether sack leaks
Gas；
（2）Positive pressure leakage detection：PLC opens " sampler bag A（B）Positive pressure leak detection pattern ", is filled with gas in sampler bag, when reaching
It when setting pressure, closes buffer and starts timing, after timer reaches the time of setting, PLC reads pressure sensor number
Value（P2）, by the way that sack slip is calculated, to judge sack whether gas leakage；
S3 cleaning methods：Exemplar is put into sampler bag A（B）In, PLC opens " sampler bag pumping " program.It is set when being extracted into
When pressure, PLC opens " sampler bag inflation " program.By repeatedly recycling the gas in pumping and inflation displacement sack, work as cycle
After number reaches setting number, it is automatically performed cleaning；
S4 inflation methods：Exemplar is put into sampler bag A（B）In, PLC opens " sampling inflation " program.When filled volume reaches
When to setting volume, it is automatically performed inflation；
S5 monitors dead volume method：Sample to be tested is put into sampler bag A（B）Middle sealing, PLC open " sampler bag dead volume
Detection " program, when sack is extracted into the vacuum pressure of setting by vacuum pump, vacuum pump is stopped.MFC1 is opened, according to setting
Filled volume to being inflated in sack, record vacuum pressure value after the completion, the information received is carried out processing calculating by PLC
After obtain exemplar dead volume.Sack method VOC testing principles are that exemplar is put into the sampler bag of certain specification, are exhausted with vacuum pump
Remaining gas.Accurately it is filled with a certain amount of gas.Traditional sack method VOC testing principles are that exemplar is put into certain specification
In sampler bag, remaining gas is exhausted with vacuum pump, then be accurately filled with a certain amount of gas, because there are one for irregular exemplar
Fixed dead angle may result in the volume of gas in sack in an experiment so the gas of residual fraction can not be exhausted completely
Control accuracy has error to influence the concentration of sample, and then influences the accuracy of testing result.So before monitoring volume
The dead volume for detecting exemplar is particularly important.
As a further improvement, the negative pressure leakage detection calculation formula of the S2 leak hunting methods is：
Q=（P2-P1）÷ P0 × V ÷ t,
The negative pressure leakage detection calculation formula of the S2 leak hunting methods is：
Q=（P1-P2）T × 1000 ÷ 101325pa × V ÷,
Wherein, Q- slips (ml/min), P1- leak detection initiation pressure setting values (pa), P2- leak detections terminate pressure set points
(pa), P0- standard atmospheric pressures（101325pa）, V- damper volumes（ml）, the t- leak detection times（min）.
As a further improvement, the calculation formula of the S5 monitorings dead volume method is：
V0=V1÷（P1-P2）× P0,
Wherein, V0- exemplars dead volume（L）, P1- detect initiation pressure setting value（pa）, P2- detection terminate pressure set points
（pa）, P0- standard atmospheric pressures（101325pa）, V1- filled volumes（L）.
The above is only the preferred embodiment of the utility model, it should be understood that the utility model is not limited to herein
Disclosed form is not to be taken as excluding other embodiments, and can be used for other combinations, modifications, and environments, and
Can be in contemplated scope described herein, modifications can be made through the above teachings or related fields of technology or knowledge.And this field
The modifications and changes that personnel are carried out do not depart from the spirit and scope of the utility model, then all rights appended by the utility model
It is required that protection domain in.
Claims (5)
1. a kind of sack method VOC pretreating devices, which is characterized in that including processing unit, control device, inlet channel and exhaust
Channel；
The processing unit includes heater box (1), sampler bag, and the sampler bag is more than or equal to 2, and the sampler bag, which is placed on, to be added
It is connect respectively with pressure sensor (12), inlet channel and exhaust passage in hot tank (1) and by gas path device (4)；
The inlet channel includes gas source interface (19), gas purifier (18), MFC1 (17), solenoid valve, the row successively
Gas channel includes vacuum pump (16), buffer (15) successively, solenoid valve, the VOC detectors (13) being connected in parallel with solenoid valve and
MFC2 (14) and solenoid valve；
The control device includes PLC controller (20), relay, touch screen, wireless communication apparatus.
2. sack method VOC pretreating devices according to claim 1, which is characterized in that be provided on the sampler bag more
A gas path device (4) interface.
3. sack method VOC pretreating devices according to claim 1 or 2, which is characterized in that the PLC controller (20)
Output end be electrically connected with touch screen, communication device input terminal, the input terminal of PLC controller (20) and pressure sensor (12),
Solenoid valve, heater box (1), gas source interface (19), gas purifier (18) are connected with MFC.
4. sack method VOC pretreating devices according to claim 3, which is characterized in that the PLC controller (20) also connects
It is connected to buzzer warning device.
5. sack method VOC pretreating devices according to claim 1, which is characterized in that the wireless communication apparatus includes
The AIR200 short message apparatus of transmission is connect with exterior terminal equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721757844.6U CN207730537U (en) | 2017-12-15 | 2017-12-15 | A kind of sack method VOC pretreating devices |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721757844.6U CN207730537U (en) | 2017-12-15 | 2017-12-15 | A kind of sack method VOC pretreating devices |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051285A (en) * | 2017-12-15 | 2018-05-18 | 宁波环测实验器材有限公司 | A kind of sack method VOC pretreating devices and its application method |
| CN109238587A (en) * | 2018-07-26 | 2019-01-18 | 武汉聚合信环保科技有限公司 | Detection method, gas sampling method and the device of gas flow channel air-tightness |
| CN110261636A (en) * | 2019-07-02 | 2019-09-20 | 宁波环测实验器材有限公司 | Fluid sampling device |
| CN111505136A (en) * | 2020-04-23 | 2020-08-07 | 一汽奔腾轿车有限公司 | Method for testing harmful volatile matters of non-metallic materials of passenger vehicle |
-
2017
- 2017-12-15 CN CN201721757844.6U patent/CN207730537U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051285A (en) * | 2017-12-15 | 2018-05-18 | 宁波环测实验器材有限公司 | A kind of sack method VOC pretreating devices and its application method |
| CN109238587A (en) * | 2018-07-26 | 2019-01-18 | 武汉聚合信环保科技有限公司 | Detection method, gas sampling method and the device of gas flow channel air-tightness |
| CN110261636A (en) * | 2019-07-02 | 2019-09-20 | 宁波环测实验器材有限公司 | Fluid sampling device |
| CN111505136A (en) * | 2020-04-23 | 2020-08-07 | 一汽奔腾轿车有限公司 | Method for testing harmful volatile matters of non-metallic materials of passenger vehicle |
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