CN109738428A - A kind of the colour developing titration detection device and its detection method of formaldehyde in air content - Google Patents
A kind of the colour developing titration detection device and its detection method of formaldehyde in air content Download PDFInfo
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- CN109738428A CN109738428A CN201910149041.XA CN201910149041A CN109738428A CN 109738428 A CN109738428 A CN 109738428A CN 201910149041 A CN201910149041 A CN 201910149041A CN 109738428 A CN109738428 A CN 109738428A
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Abstract
The invention discloses a kind of colour developing of formaldehyde in air content titration detection device and its detection methods, including air collecting device and titration detection device, the titration detection device includes at least one group of titration and detects mould group, the air collecting device includes air intake duct, bidirectional circulating draw inlet component, transition tracheae, air trapping component and air escape pipe, one end connection of the air intake duct is arranged at the air inlet of bidirectional circulating draw inlet component, the connection of transition tracheae one end is arranged at the gas outlet of bidirectional circulating draw inlet component, and the other end of the transition tracheae is connected to setting with air trapping component, the air that the air trapping component compression is collected, the inlet end of the air escape pipe is connected to air trapping component, and the outlet side of the air escape pipe detects the inspection in mould group towards titration Test paper sprays outlet setting, can be improved Test paper to the detection accuracy of formaldehyde in air content.
Description
Technical field
The invention belongs to air detection field, in particular to the colour developing of a kind of formaldehyde in air content titration detection device and
Its detection method.
Background technique
Air detection refers to the detection to the constituent of air.The air detection of narrow sense, mainly from the angle of application,
Primary study is room air detection.It refers to that interior refers to the substance being harmful to the human body that ornament materials, furniture etc. contain, and releases
Be put into household, in working environment caused by finishing pollution, to detect air quality.Major pollutants have: formaldehyde, benzene, ammonia, total
Volatile organic compounds TVOC, radioactive radon etc., and the quality of room air directly affects the health of people, especially
Formaldehyde gas, colorless and odorless, but it is very harmful.Current is mostly methylene oxide detecting instrument detection for formaldehyde air detection, but its
Testing cost is high, and simple and quick having is detected using Test paper, although its detection accuracy is not high, its is at low cost, and
And testing result can be quickly obtained, and still, since the haptoreaction for being detected air and Test paper, reagent at present is insufficient,
The content of formaldehyde error for causing test paper to detect is bigger.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the present invention provides a kind of formaldehyde in air content
Colour developing titration detection device and its detection method, can be improved Test paper to the detection accuracy of formaldehyde in air content.
Technical solution: to achieve the above object, technical scheme is as follows:
A kind of colour developing titration detection device of formaldehyde in air content, including air collecting device and titration detection device,
The titration detection device includes at least one group of titration and detects mould group, and the air collecting device includes air intake duct, two-way
One end connection of cyclic suction air intake assembly, transition tracheae, air trapping component and air escape pipe, the air intake duct is set
It sets at the air inlet of bidirectional circulating draw inlet component, the connection of transition tracheae one end is arranged in bidirectional circulating draw inlet
At the gas outlet of component, and the other end of the transition tracheae is connected to setting, the air trapping component with air trapping component
Compress the air collected, the inlet end of the air escape pipe is connected to air trapping component, and the air escape pipe out
Gas end is arranged towards the Test paper injection outlet in titration detection mould group.
Further, the bidirectional circulating draw inlet component includes sleeve, piston, reciprocating lever and displacement drive mechanism,
The sleeve is that the cylindricality of internal cavity closes shell structure, and the reciprocating lever coaxially wears an end for being movably arranged on sleeve
On, the reciprocating lever protrudes into and is provided with piston on one end of barrel bore, piston seal sliding setting, the sleeve it is interior
Chamber is separated into two relatively independent secondary barrels by piston, offers on the corresponding sleeve wall body of two secondary barrels
Into and out of stomata；One end that the reciprocating lever is located on the outside of sleeve is provided with displacement drive mechanism；By the piston along axial direction
The opposing chambers volume of two secondary barrels of shift reciprocately slidable adjustment.
Further, two secondary barrels are respectively the first air cavity and the second air cavity, described to be arranged at into and out of stomata
Close to sleeve ends side or be arranged on sleeve ends, and described into and out of being provided with check valve on stomata, it is described into and out of
Stomata includes the first air inlet, the first venthole, the second air inlet and the second venthole, first air inlet, the first outlet
Hole is correspondingly arranged with the first air cavity, and second air inlet, the second venthole and the second air cavity are correspondingly arranged.
Further, the air trapping component includes gas collection container, movable sealing plate, pressure gauge and straight-line displacement mould
Group, the gas collection container are tube structure open at one end, and the open side of the adjacent gas collection container is provided with straight-line displacement mould
Group, the straight-line displacement mould group are provided with movable sealing plate by driving end, and the movable sealing plate coaxially slide setting is collecting
In gas container, and pressure gauge is provided on the movable sealing plate, air pressure size in the pressure gauge detection gas collection container intracavity；
Collection air space by movable sealing plate with respect to the adjustment of displacement gas collection container intracavity of gas collection container keeps the inner cavity of gas collection container
Constant pressure.
Further, the titration detection mould group includes detection plate and reagent bottle, and it is recessed that the detection plate is concavely provided with test paper
Slot, reagent groove and reagent solution runner, the adjacent test paper groove of the reagent groove, the reagent solution runner is from test paper
Groove is recessed downwards, and the reagent solution runner is connected to reagent groove, and Test paper is placed in test paper groove and contact leaching
Moisten the reagent solution of reagent flowing；Reagent solution is contained in the reagent bottle, and the reagent bottle spacing is arranged in reagent groove
Top, the reagent bottle instills reagent solution into reagent groove.
Further, the reagent solution runner be in " fish-bone " shape structure, the reagent solution runner include sprue and
Runner, the sprue is recessed along the length direction of test paper groove, and several runners are separately positioned on the two of sprue
Side, and the sprue is connected to setting with runner.
It further, further include that solution collects ware, it is water groove-like structure that the solution, which collects ware, and the solution collects ware
Open side abuts the lower section that detection plate is arranged in, and the solution collects ware and detection plate forms solution collecting chamber；The detection plate
It is concavely provided with hydrops groove, the recessed surface in test paper groove of hydrops groove, and the surrounding profile of the hydrops groove
It is all larger than test paper groove, is circumferentially penetrated through above and below on the hydrops groove and offers several resorption holes, worn in the resorption hole
There is capillary, the top of the capillary is not higher than resorption hole, and the bottom end of the capillary extends substantially downward in solution collecting chamber,
And the bottom wall of the capillary tube spacing and solution collecting chamber；The reagent solution overflowed in test paper groove is siphoned away by capillary, is made
Test paper infiltrates reagent solution always, and remains that Test paper upper surface is exposed in air to be detected.
Further, it is provided with transverse tube above the detection plate, closed at one end, and the other end and the air of the transverse tube
The outlet side of escape pipe is connected to, and the transverse tube offers at least one set of outgassing micropore towards the perforation of the side of detection plate, it is described go out
Gas micropore is arranged towards Test paper outlet, is arranged successively along the length direction of transverse tube and is provided at least one set of titration detection mould
Group, outgassing micropore described in each group are correspondingly arranged with each detection plate.
Further, the titration detection device further includes detection case and circulation pipe, and the detection case is closed shell
Structure, the both ends of the circulation pipe be respectively communicated with the inner cavity of detection case, air trapping component gas collection container inner cavity, and it is described
Check valve is provided in circulation pipe, the gas in the detection case can be passed through to gas collection container.
A kind of colour developing titration detection method of formaldehyde in air content, comprising the following steps:
S1: close air escape pipe on switch valve, starting displacement driving mechanism, displacement drive mechanism drive reciprocating lever and
Piston reciprocatingly slides displacement in the inner cavity of sleeve, under piston position status, when the volume of the first air cavity is gradually reduced, and
Air in one air cavity is discharged by the first venthole to crossing tracheae, and is finally collected in gas collection container, meanwhile, the second gas
The volume of chamber gradually increases, and the second air cavity sucks air by the second air inlet；
When piston reverses direction is displaced, the volume of the first air cavity is gradually increased, and the first air cavity sucks air by the first air inlet,
Meanwhile second the volume of air cavity be gradually reduced, the air in the second air cavity is discharged by the second venthole to crossing tracheae, and final
It is collected in gas collection container；Air is collected until air pressure is in 0.12~0.15MPa in gas collection container；
S2: reagent bottle continues to drip reagent solution into reagent groove, and Test paper infiltrates the examination in reagent solution runner
Agent solution；The switch valve on air escape pipe is opened, the air in gas collection container is quickly through transverse tube and outgassing micropore to detection
Test paper flowing on plate, there are initial velocity for the air gas of flowing, and with slight compression shock on Test paper, inspection
Formaldehyde gas chromogenic reaction in the reagent solution and air infiltrated on test paper；
Meanwhile by straight-line displacement mould group drive movable sealing plate displacement fine tuning, make gas collection container intracavity remain or
Close to the internal pressure of 0.12MPa；
S3: into the air in detection case with after Test paper chromogenic reaction, it is back to gas collection container again by circulation pipe
In inner cavity, reciprocation cycle gradually empties in gas collection container and detection case until detection terminates after the colour stable of Test paper
Air gas.
The utility model has the advantages that the present invention is aspirated in air gas to air trapping component by bidirectional circulating draw inlet component,
And by air trapping collect components and compressed air gas, namely the internal pressure for being collected air is improved, in release air
When air gas in collection assembly, air is injected in certain initial velocity by the Test paper of infiltration reagent solution, empty
Detected gas substance in gas can be adequately with the detection reagent solution haptoreaction on test paper, and high degree improves
Catalytic adequacy, to improve the detection accuracy of the measured matters such as Test paper detection formaldehyde in air；In addition, by following
Endless tube is connected to air trapping component and detection case, and tested air is recycled in detection case and air trapping component
Flowing, it is further to guarantee sufficiently reacting for measured object and detection reagent in air, promote detection accuracy.
Detailed description of the invention
Attached drawing 1 is integrally-built stereoscopic schematic diagram of the invention；
Attached drawing 2 is whole schematic diagram of internal structure of the invention；
Attached drawing 3 is sectional view along A-A of the invention；
Attached drawing 4 is the enlarged structure schematic diagram of part B in Fig. 3 of the present invention；
Attached drawing 5 is the schematic perspective view of titration detection mould group of the invention；
Attached drawing 6 is the explosive view of titration detection mould group of the invention.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in attached drawing 1 to attached drawing 3, a kind of colour developing titration detection device of formaldehyde in air content, including air trapping
Device and titration detection device, the titration detection device include at least one group of titration and detect mould group 13, may include multiple groups titration
Mould group is detected, to detect substance different in air, such as formaldehyde, sulfur dioxide, to realize that its is multi-functional and mostly applicable
Property, the air collecting device includes air intake duct 2, bidirectional circulating draw inlet component 5, transition tracheae 11, air trapping
Component 8 and air escape pipe 15, the air intake duct 2 one end connection be arranged in bidirectional circulating draw inlet component 5 into
At port, dedusting drying device 3, the dedusting drying device 3 are additionally provided on the pipeline of the air intake duct 2
Dust removal by filtration is collected the moisture in the impurity and dry air in air, reduces the impurity substances in gas, guarantees test
Accuracy, 11 one end of transition tracheae connection is arranged at the gas outlet of bidirectional circulating draw inlet component 5, and the transition
The other end of tracheae 11 is connected to setting with air trapping component 8, and the air that the compression of air trapping component 8 is collected simultaneously keeps permanent
The inlet end of pressure condition, the air escape pipe 15 is connected to air trapping component 8, and the outlet side of the air escape pipe 15
Outlet setting, the detection examination comprising infiltration reagent solution in the titration detection mould group 13 are sprayed towards titration detection mould group 13
Gas is sprayed on Test paper in the outlet side of paper, the air escape pipe.
It is aspirated in air gas to air trapping component by bidirectional circulating draw inlet component, and passes through air trapping
Collect components and compressed air gas, namely the internal pressure for being collected air is improved, the air in release air trapping component
When gas, air is injected in certain initial velocity by the detected gas on the Test paper of infiltration reagent solution, in air
Substance can adequately with the detection reagent solution haptoreaction on test paper, high degree improve it is catalytic sufficiently
Property, to improve the detection accuracy of the measured matters such as Test paper detection formaldehyde in air.
Preferably, the titration detection device further includes detection case 29 and circulation pipe 34, and the detection case 29 is closed
Shell structure, several titration detection mould groups are arranged in the detection case 29, and the both ends of the circulation pipe 34 are respectively communicated with
The inner cavity of detection case 29, the gas collection container 14 of air trapping component 8 inner cavity, and be provided with check valve in the circulation pipe 34,
So that the gas in the detection case 29 can be passed through to gas collection container 14.It is shown into the air in detection case 29 with Test paper
It after colour response, is back to again by circulation pipe 34 in the inner cavity of air trapping component 8, the flowing of air gas reciprocation cycle, with
The air sample being collected sufficiently and is completely reacted with detection side reagent, guarantees the accuracy of detection.
As shown in Fig. 2, the bidirectional circulating draw inlet component 5 includes sleeve 51, piston 54, reciprocating lever 55 and displacement
Driving mechanism 4, the sleeve 51 are that the cylindricality of internal cavity closes shell structure, and the reciprocating lever 55, which is coaxially worn, to be movably arranged on
On one end of sleeve 51, the reciprocating lever 55, which protrudes on one end of barrel bore, is provided with piston 54, and the piston 54 is close
Envelope sliding setting, the inner cavity of the sleeve 51 is separated into two relatively independent secondary barrels, two secondary barrels by piston
It offers on corresponding sleeve wall body into and out of stomata；One end that the reciprocating lever 55 is located at 51 outside of sleeve is provided with displacement
Driving mechanism 4；The displacement drive mechanism is cam mechanism or cylinder isoline displacement mechanism, by the piston 54 along axial direction
Two secondary barrels of shift reciprocately slidable adjustment opposing chambers volume.Two secondary barrels are respectively the first air cavity 52 and
Two air cavitys 53, it is described into and out of stomata be arranged at close to 51 end side of sleeve or be arranged on sleeve ends, and it is described into,
Be provided with check valve 58 on venthole, it is described into and out of stomata include the first air inlet, the first venthole, the second air inlet and
Second venthole, first air inlet, the first venthole and the first air cavity 52 are correspondingly arranged, second air inlet, second
Venthole is correspondingly arranged with the second air cavity.Close the switch valve 33 on air escape pipe 15, starting displacement driving mechanism 4, displacement
Driving mechanism driving reciprocating lever 55 and piston 54 reciprocatingly slide displacement in the inner cavity of sleeve 51, under 54 location status of piston,
When the volume of the first air cavity 52 is gradually reduced, air in the first air cavity 52 is discharged by the first venthole to crossing tracheae 11,
And be finally collected in gas collection container 14, meanwhile, the volume of the second air cavity 53 gradually increases, and the second air cavity 53 passes through second
Air inlet sucks air；
When piston reverses direction is displaced, the volume of the first air cavity 52 is gradually increased, and the first air cavity 52 is sucked by the first air inlet
Air, meanwhile, the volume of the second air cavity 53 is gradually reduced, and the air in the second air cavity 53 is discharged by the second venthole to crossing gas
Pipe 11, and be finally collected in gas collection container 14.It is collected simultaneously air gas by two air intake ducts 2, can be accelerated
The sample rate of air, moreover, extend the length of air intake duct, it can be to the sky in space by two air intake ducts 2
Gas carries out multiposition, multi-faceted air sampling, avoids the exceeded of the substances such as somewhere formaldehyde or few content and causes detection error.
As shown in attached drawing 1 to attached drawing 3, the air trapping component 8 includes gas collection container 14, movable sealing plate 16, pressure
Table 6 and straight-line displacement mould group 7, the gas collection container 14 are tube structure open at one end, and the adjacent gas collection container 14 is opened
Mouth side is provided with straight-line displacement mould group 7, and the straight-line displacement mould group 7 is provided with movable sealing plate 16, the work by driving end
Dynamic sealing plate coaxially slide is arranged in gas collection container 14, and pressure gauge 6, the pressure are provided on the movable sealing plate 16
Table detects air pressure size in 14 inner cavity of gas collection container；Adjustment of displacement gas collection by movable sealing plate 16 with respect to gas collection container 14 holds
The collection air space of 14 inner cavity of device keeps the inner cavity constant pressure of gas collection container 14, collects air until air pressure exists in gas collection container 14
0.12~0.15MPa.
As shown in attached drawing 4 to attached drawing 6, the titration detection mould group 13 includes detection plate 20 and reagent bottle 10, the detection
Plate 20 is concavely provided with test paper groove 23, reagent groove 24 and reagent solution runner 25, the adjacent test paper of the reagent groove 24
Groove 23, the reagent solution runner 25 is recessed downwards from test paper groove 23, and the reagent solution runner 25 connection reagent is recessed
Slot 24, Test paper is placed in test paper groove and the reagent solution of contact infiltration reagent flowing 25；It is contained in the reagent bottle 10
Installed reagents solution, and the top of reagent groove 24 is arranged in the reagent bottle spacing, the reagent bottle 10 is into reagent groove 24
Reagent solution is instilled dropwise.Reagent solution flows into reagent solution channel 25 by reagent groove 24, is placed in reagent solution channel
The Test paper of top absorbs and infiltration reagent solution, the reagent solution runner 25 are in " fish-bone " shape structure, and the reagent is molten
Liquid stream road 25 includes sprue 28 and runner 26, and the sprue 28 is recessed along the length direction of test paper groove 24, Ruo Gansuo
The two sides that runner 26 is separately positioned on sprue 28 are stated, and the sprue is connected to setting with runner, guarantees Test paper
Reagent solution can adequately be infiltrated.
It further include that solution collects ware 21, it is water groove-like structure that the solution, which collects ware 21, and the solution collects opening for ware 21
Mouth side abuts the lower section that detection plate 20 is arranged in, and the solution collects ware 21 and detection plate 20 forms solution collecting chamber；The inspection
Drafting board 20 is concavely provided with hydrops groove 22, the recessed surface in test paper groove 23 of hydrops groove 22, and the hydrops is recessed
The surrounding profile of slot 22 is all larger than test paper groove 23, circumferentially penetrates through above and below on the hydrops groove 23 and offers several resorptions
Hole 31, capillary 27 is equipped in the resorption hole 31, and the top of the capillary 27 is not higher than resorption hole 31, and the capillary
The bottom end of pipe 27 extends substantially downward in solution collecting chamber, and the bottom wall of the capillary 27 spacing and solution collecting chamber；Pass through capillary
Pipe 27 siphons away the reagent solution overflowed in test paper groove 23, so that Test paper is infiltrated reagent solution always, and remain detection
Test paper upper surface is exposed in air to be detected, so that the air being passed through in detection case 29 can be detected with directly acting on
Test paper, the air of flowing develop the color by Test paper and with reagent haptoreaction, by capillary resorption overflow checking test paper with
On reagent solution, can guarantee Test paper infiltrated completely in the state of, avoid the waste of reagent solution, meanwhile,
It avoids air gas from directly reacting with the reagent solution other than Test paper, guarantees to be tested matter in air, as formaldehyde gas can
All only in reagent solution contact and chromogenic reaction on Test paper, to obtain most accurately developing the color as a result, guaranteeing test
Accuracy.
Transverse tube 19 is provided at the top of the inner wall of the detection 29, closed at one end, and the other end and the air of the transverse tube 19
The outlet side of escape pipe 15 is connected to, and the transverse tube 19 offers at least one set of outgassing micropore towards the perforation of the side of detection plate 20
30, the outgassing micropore 30 is arranged towards Test paper outlet, and the length direction in the detection case 29 along transverse tube 19 is successively arranged
Column are provided at least one set of titration detection mould group 13, and outgassing micropore 30 described in each group is correspondingly arranged with each detection plate, by several
Group outgassing micropore 30 directly corresponds to Test paper, to ensure that tested air can act on Test paper, guarantees catalytic
Adequacy improves detection accuracy.
A kind of colour developing titration detection method of formaldehyde in air content, comprising the following steps:
S1: the switch valve 33 on air escape pipe 15 is closed, starting displacement driving mechanism 4, displacement drive mechanism drives past
Compound lever 55 and piston 54 reciprocatingly slide displacement in the inner cavity of sleeve 51, under 54 location status of piston, when the first air cavity 52
When volume is gradually reduced, air in the first air cavity 52 is discharged by the first venthole to crossing tracheae 11, and is finally collected in
In gas collection container 14, meanwhile, the volume of the second air cavity 53 gradually increases, and the second air cavity 53 is empty by the sucking of the second air inlet
Gas；
When piston reverses direction is displaced, the volume of the first air cavity 52 is gradually increased, and the first air cavity 52 is sucked by the first air inlet
Air, meanwhile, the volume of the second air cavity 53 is gradually reduced, and the air in the second air cavity 53 is discharged by the second venthole to crossing gas
Pipe 11, and be finally collected in gas collection container 14；Air is collected until air pressure is in 0.12~0.15MPa in gas collection container 14；
S2: reagent bottle continues to drip reagent solution into reagent groove 24, and Test paper infiltrates in reagent solution runner 25
Reagent solution；The switch valve 33 on air escape pipe 15 is opened, the air in gas collection container 14 is quickly through transverse tube 19 and goes out
Test paper flowing of the gas micropore 30 in detection plate 20, there are initial velocity for the air gas of flowing, and are rushed with slight pressure
It hits on Test paper, the formaldehyde gas chromogenic reaction in the reagent solution and air infiltrated on Test paper；
Meanwhile the displacement fine tuning of movable sealing plate 16 is driven by straight-line displacement mould group, protect 14 inner cavity of gas collection container always
Hold or close to 0.12MPa internal pressure；
S3: into the air in detection case 29 with after Test paper chromogenic reaction, gas collection is back to by circulation pipe 34 again
In 14 inner cavity of container, reciprocation cycle gradually empties gas collection container and inspection until detection terminates after the colour stable of Test paper
Air gas in measuring tank.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of colour developing of formaldehyde in air content titrates detection device, it is characterised in that: including air collecting device and titration
Detection device, the titration detection device include at least one group of titration and detect mould group (13), and the air collecting device includes sky
Gas air inlet pipe (2), bidirectional circulating draw inlet component (5), transition tracheae (11), air trapping component (8) and air escape pipe
(15), one end connection of the air intake duct (2) is arranged at the air inlet of bidirectional circulating draw inlet component (5), described
The connection of transition tracheae (11) one end is arranged at the gas outlet of bidirectional circulating draw inlet component (5), and the transition tracheae
(11) the other end is connected to setting with air trapping component (8), and the air that air trapping component (8) compression is collected is described
The inlet end of air escape pipe (15) is connected to air trapping component (8), and the outlet side direction of the air escape pipe (15)
Test paper injection outlet setting in titration detection mould group (13).
2. a kind of colour developing of formaldehyde in air content according to claim 1 titrates detection device, it is characterised in that: described
Bidirectional circulating draw inlet component (5) includes sleeve (51), piston (54), reciprocating lever (55) and displacement drive mechanism (4), described
Sleeve (51) is that the cylindricality of internal cavity closes shell structure, and the reciprocating lever (55) coaxially wears and is movably arranged on sleeve (51)
On one end, the reciprocating lever (55), which is protruded on one end of barrel bore, to be provided with piston (54), piston (54) sealing
Sliding setting, the inner cavity of the sleeve (51) is separated into two relatively independent secondary barrels, two secondary barrels by piston
It offers on corresponding sleeve wall body into and out of stomata；One end that the reciprocating lever (55) is located on the outside of sleeve (51) is provided with
Displacement drive mechanism (4)；By the piston (54) along the opposing chambers of axial two secondary barrels of shift reciprocately slidable adjustment
Volume.
3. a kind of colour developing of formaldehyde in air content according to claim 2 titrates detection device, it is characterised in that: two
The secondary barrel is respectively the first air cavity (52) and the second air cavity (53), described to be arranged at into and out of stomata close to sleeve (51)
End side is arranged on sleeve ends, and described into and out of being provided with check valve (58) on stomata, described into and out of stomata
Including the first air inlet (56a), the first venthole (56b), the second air inlet (57a) and the second venthole (57b), described first
Air inlet (56a), the first venthole (56b) and the first air cavity (52) are correspondingly arranged, and second air inlet (57a), second go out
Stomata (57b) is correspondingly arranged with the second air cavity.
4. a kind of colour developing of formaldehyde in air content according to claim 1 titrates detection device, it is characterised in that: described
Air trapping component (8) includes gas collection container (14), movable sealing plate (16), pressure gauge (6) and straight-line displacement mould group (7), institute
Stating gas collection container (14) is tube structure open at one end, and the open side of the adjacent gas collection container (14) is provided with straight-line displacement
Mould group (7), the straight-line displacement mould group (7) are provided with movable sealing plate (16) by driving end, and the movable sealing plate is coaxial
It is slidably arranged in gas collection container (14), and is provided with pressure gauge (6) on the movable sealing plate (16), the pressure gauge detection
Air pressure size in gas collection container (14) inner cavity；Adjustment of displacement gas collection by movable sealing plate (16) with respect to gas collection container (14) holds
The collection air space of device (14) inner cavity keeps the inner cavity constant pressure of gas collection container (14).
5. a kind of colour developing of formaldehyde in air content according to claim 1 titrates detection device, it is characterised in that: described
Titration detection mould group (13) includes detection plate (20) and reagent bottle (10), and the detection plate (20) is concavely provided with test paper groove
(23), reagent groove (24) and reagent solution runner (25), the adjacent test paper groove (23) of the reagent groove (24) are described
Reagent solution runner (25) is recessed downwards from test paper groove (23), and the reagent solution runner (25) is connected to reagent groove
(24), Test paper is placed in test paper groove and contact infiltration reagent flows the reagent solution of (25)；The reagent bottle (10)
Interior splendid attire reagent solution, and reagent bottle spacing setting is in the top of reagent groove (24), the reagent bottle (10) is to reagent
Reagent solution is instilled in groove (24).
6. a kind of colour developing of formaldehyde in air content according to claim 5 titrates detection device, it is characterised in that: described
Reagent solution runner (25) is in " fish-bone " shape structure, and the reagent solution runner (25) includes sprue (28) and runner
(26), the sprue (28) is recessed along the length direction of test paper groove (24), and several runners (26) are separately positioned on
The two sides of sprue (28), and the sprue is connected to setting with runner.
7. a kind of colour developing of formaldehyde in air content according to claim 5 titrates detection device, it is characterised in that: also wrap
It includes solution and collects ware (21), it is water groove-like structure that the solution, which collects ware (21), and the open side that the solution collects ware (21) is supported
Setting is connect in the lower section of detection plate (20), the solution collects ware (21) and detection plate (20) and forms solution collecting chamber (210)；Institute
It states detection plate (20) to be concavely provided with hydrops groove (22), the recessed surface in test paper groove (23) of hydrops groove (22),
And the surrounding profile of the hydrops groove (22) is all larger than test paper groove (23), it is circumferentially upper and lower on the hydrops groove (23)
Perforation offers several resorption holes (31), is equipped with capillary (27) in the resorption hole (31), the top of the capillary (27)
End is not higher than resorption hole (31), and the bottom end of the capillary (27) extends substantially downward in solution collecting chamber (210), and the capillary
Manage the bottom wall of (27) spacing and solution collecting chamber (210)；The reagent overflowed in test paper groove (23) is siphoned away by capillary (27)
Solution makes Test paper infiltrate reagent solution always, and remains that Test paper upper surface is exposed in air to be detected.
8. a kind of colour developing of formaldehyde in air content according to claim 7 titrates detection device, it is characterised in that: described
It is provided with above detection plate (20) transverse tube (19), closed at one end, and the other end and the air escape pipe of the transverse tube (19)
(15) outlet side connection, the transverse tube (19) offer at least one set of outgassing micropore towards the perforation of the side of detection plate (20)
(30), the outgassing micropore (30) is arranged towards Test paper outlet, is arranged successively and is provided with along the length direction of transverse tube (19)
At least one set titration detects mould group (13), and outgassing micropore (30) described in each group is correspondingly arranged with each detection plate.
9. a kind of colour developing of formaldehyde in air content according to claim 1 titrates detection device, it is characterised in that: described
Titration detection device further includes detection case (29) and circulation pipe (34), and the detection case (29) is closed shell structure, described
The both ends of circulation pipe (34) be respectively communicated with the inner cavity of detection case (29), air trapping component (8) gas collection container (14) inner cavity,
And check valve is provided in the circulation pipe (34), the gas in the detection case (29) can be passed through to gas collection container (14).
10. a kind of colour developing of formaldehyde in air content according to any one of claims 1 to 9 titrates detection method, special
Sign is: the following steps are included:
S1: the switch valve (33) on air escape pipe (15), starting displacement driving mechanism (4), the driving of displacement drive mechanism are closed
Reciprocating lever (55) and piston (54) reciprocatingly slide displacement in the inner cavity of sleeve (51), under piston (54) location status, when
When the volume of one air cavity (52) is gradually reduced, air in the first air cavity (52) is discharged by the first venthole (56b) to crossing gas
It manages (11), and is finally collected in gas collection container (14), meanwhile, the volume of the second air cavity (53) gradually increases, and the second gas
Chamber (53) sucks air by the second air inlet (57a)；
When piston reverses direction is displaced, the volume of the first air cavity (52) is gradually increased, and the first air cavity (52) passes through the first air inlet (56a)
Air is sucked, meanwhile, the volume of the second air cavity (53) is gradually reduced, and the air in the second air cavity (53) passes through the second venthole
(57b) is discharged into crossing tracheae (11), and is finally collected in gas collection container (14)；Air is collected until in gas collection container (14)
Air pressure is in 0.12~0.15MPa；
S2: reagent bottle continues to drip reagent solution into reagent groove (24), and Test paper infiltrates in reagent solution runner (25)
Reagent solution；The switch valve (33) on air escape pipe (15) is opened, the air in gas collection container (14) is quickly through transverse tube
(19) and outgassing micropore (30) on detection plate (20) Test paper flowing, there are initial velocity for the air gas of flowing, and with
For slight compression shock on Test paper, the formaldehyde gas colour developing in reagent solution and air infiltrated on Test paper is anti-
It answers；
Meanwhile by straight-line displacement mould group driving movable sealing plate (16) displacement fine tuning, protect gas collection container (14) inner cavity always
Hold or close to 0.12MPa internal pressure；
S3: after entering the air in detection case (29) and Test paper chromogenic reaction, gas collection is back to by circulation pipe (34) again
In container (14) inner cavity, reciprocation cycle, until Test paper colour stable after, detection terminates, gradually empty gas collection container and
Air gas in detection case.
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| CN115463579A (en) * | 2022-09-13 | 2022-12-13 | 江苏众利海洋科技有限公司 | Food detection device with food refrigeration function and implementation method thereof |
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