CN207689254U - A kind of thermal desorption device for detection and analysis - Google Patents
A kind of thermal desorption device for detection and analysis Download PDFInfo
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- CN207689254U CN207689254U CN201721876494.5U CN201721876494U CN207689254U CN 207689254 U CN207689254 U CN 207689254U CN 201721876494 U CN201721876494 U CN 201721876494U CN 207689254 U CN207689254 U CN 207689254U
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Abstract
The utility model is related to thermal desorption detection technique fields, disclose a kind of thermal desorption device for detection and analysis.Thermal desorption device includes capping and air chamber rear seal-cover before heating device, air chamber, cover rim and air chamber rear seal-cover are connected with each other before air chamber, heating device covers before being mounted on air chamber between air chamber rear seal-cover, the air inlet that supplied gas enters is equipped with before air chamber between capping and air chamber rear seal-cover, air chamber rear seal-cover is equipped with the bleeding point of supplied gas extraction, covers between heating device that there are the gaps being inserted into for test paper before air chamber.The utility model can make what heat more concentrated to be distributed to test paper surface so that heating is rapid and heat is concentrated, and heat utilization efficiency is high.Preheating speed is substantially improved, greatly reduces heat dissipation, lower power consumption, preheating time shortens.It can directly be cooled down, need not be radiated and heat-proof device with sample introduction gas, it is simple in structure, it is small, it is easy to carry.
Description
Technical field
The utility model is related to thermal desorption detection technique field, more particularly to a kind of thermal desorption dress for detection and analysis
It sets.
Background technology
Test paper samples the cleaning sampling for being generally used for solid powder, by the way that trace determinand is adhered to test paper
On, it is then placed in thermal desorption device so that determinand desorption gasification, and then detected instrument is taken away and is detected analysis.With
Requirement to environment, safety etc. is more and more harsh, and supervision coverage area is more and more wider, is applied to the portable trace analysis at scene
Detecting instrument is more and more common, and the thermal desorption device and method to detection and analysis are reducing power consumption, improving speed, miniature lightweight
It is convenient that more stringent requirements are proposed.
The prior art all first heats heat conduction cavity using heating element, and is maintained at certain temperature, then passes through heat conduction again
Cavity is conducted to the method for test paper to be measured to make determinand gasify.This method has the disadvantage that：First, heat conduction cavity has centainly
Volume, so the temperature that heat conduction cavity is warming up to needs needs long time, the agility for being unfavorable for instrument uses.The
Two, since the heating-up time is long, in order to facilitate instrument continue working, heat conduction cavity can only be made to be constantly in heated condition；Cause
Entire thermal desorption device persistently radiates, and power consumption becomes larger, and is unfavorable for battery powered instrument long-term work, it is also desirable to more electricity
Pond.Third, due to being constantly in heated condition, in order to reduce thermal losses, it is necessary to add heat-insulated and attemperator so that total volume
Become larger, is unfavorable for thermal desorption device and develops towards the direction of micromation, lighting.
Utility model content
The utility model provides one kind and is used for for detection speed is slow in the prior art, power consumption is high, bulky disadvantage
The thermal desorption device of detection and analysis.
The utility model uses the electricity of winding on the electrode no longer using original method for heating test paper by thermal conductive cavity
Heated filament layer, directly heats test paper so that heating process thermal losses is reduced, and working efficiency improves, and instrument is using process
Middle power consumption substantially reduces, and the wear life for improving battery or the size for reducing battery enhance instrument lighting and portable
Property, while heating speed is improved, it is used convenient for the agility detection of instrument.It can be direct by the gas newly entered when pumping
Unit temp will be reduced, fan cooling is not needed, it also need not very thick prodigious heat-insulated and thermal insulation material so that whole thermal desorption
Device is more small and exquisite, light.
In order to solve the above-mentioned technical problem, the utility model is addressed by following technical proposals：
A kind of thermal desorption device for detection and analysis, including capping and air chamber rear seal-cover before heating device, air chamber,
Cover rim and air chamber rear seal-cover are connected with each other before air chamber, and heating device is covered before being mounted on air chamber and sealed after air chamber
Between lid；Heating device includes heating wire, electrode, electrode support and conductor terminal, and wherein electrode is arranged in parallel, electrode two
End is fixedly connected with electrode support respectively, and electrode accesses electric current by conductor terminal, and equidistantly winding is on the electrode, electric for heating wire
Heated filament forms electric wire layer between the electrodes；It covers left and right ends before air chamber to be fixedly connected with electrode support respectively, air chamber
Rear seal-cover left and right ends are fixedly connected with electrode support respectively, and capping, air chamber rear seal-cover and electrode support surround before air chamber
Flat air chamber up and down is formed, air chamber upper and lower ends are equipped with the air inlet that supplied gas enters, air chamber rear seal-cover
It is equipped with the bleeding point of supplied gas extraction, covers between heating device that there are the gaps being inserted into for test paper before air chamber.
Heating device rests on cover rim before air chamber for being heated to test paper after the determinand gasification on test paper
Between air chamber rear seal-cover, determinand is taken away by being evacuated from bleeding point at this time, at the same cold air from air inlet into
Enter, achievees the effect that cooling device.Electrode connects electricity by conductor terminal, and heating wire obtains the electric energy on electrode and is translated into
Thermal energy, to be heated to test paper.Electric-heating-wire-heating speed is fast, and attainable temperature is high, determinand can be made to gasify rapidly.Electricity
Pole holder is for fixing electrode position, while conductor terminal and electrode connect inside it, avoid leaking electricity.
Preferably, further including protecgulum and rear cover, protecgulum is fixedly connected with rear cover, heating wire, electrode, electrode support, gas
Capping and air chamber rear seal-cover are arranged between protecgulum and rear cover before body cavity；Protecgulum inner wall is equipped with convex block, after cover equipped with logical
Hole, position is corresponding with conductor terminal, after cover equipped with for capping, air chamber rear seal-cover and electrode support before fixed gas chamber
Fixing piece.For being covered before pushing down air chamber, the position covered before fixed gas chamber is kept between the two convex block on protecgulum
Distance helps to radiate.The through-hole covered afterwards facilitates conductor terminal to be pierced by, and conductor terminal, which is pierced by, is followed by electricity, and fixing piece is for solid
Determine capping, air chamber rear seal-cover and electrode support before air chamber, avoid moving, keep between air chamber rear seal-cover and rear cover away from
From helping to radiate.
Preferably, the wire guide that electrode support both ends are equipped with the electrode hole that power pole is inserted into and are inserted into for conductor terminal,
Electrode hole is connected to wire guide, and conductor terminal and electrode connect inside electrode support；Electrode support is set on opposite two sides
The straight slot of oriented inner recess, slot bottom are equipped with the through-hole of connection both sides straight slot.Covered before straight slot and air chamber and air chamber after
The convex block for covering both sides is corresponding, and the convex block before air chamber in capping and air chamber rear seal-cover is respectively clamped into electrode support both sides
Straight slot in, while the through-hole of slot bottom is also corresponded with the through-hole on convex block, after the fixing piece that covers by sequentially passing through gas
Covered before body cavity rear seal-cover projection through hole, electrode support straight slot through-hole and air chamber projection through hole come capping before fixed gas chamber,
The position of air chamber rear seal-cover and electrode support.
Preferably, covering the both sides being connect with electrode support before air chamber is equipped with outwardly projecting convex block, set on convex block
There is the front and back through-hole penetrated through；The both sides that air chamber rear seal-cover is connect with electrode support are equipped with outwardly projecting convex block, are set on convex block
There is the front and back through-hole penetrated through；Air chamber rear seal-cover is equipped with the straight slot being mutually parallel close to the face of electric wire layer, and straight slot or so passes through
Logical, the positions and dimensions of straight slot are corresponding with electrode；Groove is equipped between straight slot, the heart, bleeding point pass through bleeding point in the grooves
Wear air chamber rear seal-cover.Straight slot on air chamber rear seal-cover fixes the position of electrode and electric wire layer, simultaneously for placing electrode
It controls and the distance between covers before electric wire layer and air chamber so that after test paper is put into, energy between test paper surface and electric wire layer
Enough there is a fixed gap, such as 0.2mm.
Preferably, electrode surface is equipped with several winding slots being spaced substantially equidistant, both ends are equipped with for connecting with conductor terminal
The groove connect；In winding slot, heating wire both ends are fixedly connected on the electrode heating wire winding；Electric wire layer is set to electrode
Unilateral side, two adjacent heating wire spacing are 0.5-1.5mm in electric wire layer.Heating wire is wound in winding slot, helps to control
The spacing of heating wire processed also ensures that heating wire will not move in use.
Preferably, electrode both ends are connect with conductor terminal respectively, the wherein conductor terminal and electrode conduction of one end is another
The conductor terminal and electrode insulation at end, one of them is equipped with thermocouple with the conductor terminal of electrode insulation and the junction of electrode,
In the groove of electrode, the lead of thermocouple is connected on the conductor terminal with electrode insulation the installation of TC.Electrode one end
Conductor terminal with power supply for connecting, and for the other end for transmitting temperature measurement data, thermocouple plays the role of overheat protector.
The fixing piece covered after preferably, is symmetrical set on the face of close air chamber rear seal-cover, fixing piece packet
Include outwardly convex boss and with boss surface straight-bar connected vertically.Boss keeps rear cover for resisting air chamber rear seal-cover
The distance between air chamber rear seal-cover, straight-bar be used for across air chamber rear seal-cover projection through hole, electrode support straight slot through-hole and
Projection through hole is covered before air chamber.
Preferably, heating device includes electric heating piece.Heater strip is replaced with heating plate or heating plate is put into test paper
The back side can realize basic function, but time, power consumption and other effects can be substantially reduced；
The utility model has significant technique effect as a result of above technical scheme：Heat can be made more to concentrate
Be distributed to test paper surface so that heating is rapid and heat is concentrated, and heat utilization efficiency is high.Preheating speed is substantially improved, greatly subtracts
Heat dissipation, lower power consumption are lacked, preheating time shortens.Can directly be cooled down with sample introduction gas, need not radiate and every
Thermal, it is simple in structure, it is small, it is easy to carry.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment 1.
Fig. 2 is the internal structure schematic diagram of the utility model embodiment 1.
Fig. 3 is structural representation Fig. 1 of electrode.
Fig. 4 is structural representation Fig. 2 of electrode.
Fig. 5 is the structural schematic diagram of electric wire layer.
The toponym that each number designation is referred in the figures above is as follows：Wherein, before 1-heating device, 2-air chambers
Capping, 3-air chamber rear seal-covers, 4-air inlets, 5-bleeding points, 6-test papers, 7-protecgulums, 8-rear covers, 11-electric heating
It is convex that convex block, 31-air chamber rear seal-covers are covered before silk, 12-electrodes, 13-electrode supports, 14-conductor terminals, 21-air chambers
Behind block, 32-air chamber rear seal-cover straight slots, 33-air chamber rear seal-cover grooves, 71-protecgulum convex blocks, 81-rear cover through-holes, 82-
Lid fixing piece, 121-winding slots, 122-electrode grooves, 131-electrode holes, 132-wire guides, 133-electrode support straight slots,
Through-hole, 311-air chamber rear seal-cover through-holes are covered before 134-electrode support through-holes, 211-air chambers.
Specific implementation mode
The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Fig. 1 to 5, a kind of thermal desorption device for detection and analysis, it is characterised in that：Including heating device 1, gas
2 and air chamber rear seal-cover 3 are covered before body cavity, and 2 edges are covered before air chamber and air chamber rear seal-cover 3 is connected with each other, heating device 1
Before air chamber between capping 2 and air chamber rear seal-cover 3；Heating device 1 includes heating wire 11, electrode 12, electrode support
13 and conductor terminal 14, wherein electrode 12 is arranged in parallel, and 12 both ends of electrode are fixedly connected with electrode support 13 respectively, electrode
12 access electric current by conductor terminal 14, and heating wire 11 is equidistantly wrapped on electrode 12, the shape between electrode 12 of heating wire 11
At 11 layers of heating wire；It covers 2 left and right ends before air chamber to be fixedly connected with electrode support 13 respectively, air chamber rear seal-cover 3 or so
Both ends are fixedly connected with electrode support 13 respectively, cover 2, air chamber rear seal-cover 3 before air chamber and electrode support 13 surrounds to be formed
Flat air chamber up and down, air chamber upper and lower ends are equipped with the air inlet 4 that supplied gas enters, on air chamber rear seal-cover 3
Bleeding point 5 equipped with supplied gas extraction, there are the skies being inserted into for test paper 6 between capping 2 and heating device 1 before air chamber
Gap.
Further include protecgulum 7 and rear cover 8, protecgulum 7 is fixedly connected with rear cover 8, heating wire 11, electrode 12, electrode support 13, gas
Capping 2 and air chamber rear seal-cover 3 are arranged between protecgulum 7 and rear cover 8 before body cavity；7 inner wall of protecgulum is equipped with convex block 71, rear cover 8
It is equipped with through-hole 81, position is corresponding with conductor terminal 14, and rear cover 8 is equipped with for after capping 2, air chamber before fixed gas chamber
The fixing piece 82 of capping 3 and electrode support 13.Fixing piece 82 on rear cover 8 is symmetrical set close to air chamber rear seal-cover 3
Face on, the boss of fixing piece 82 including outwardly convex and with boss surface straight-bar connected vertically.
The wire guide that 13 both ends of electrode support are equipped with the electrode hole 131 that power pole 12 is inserted into and are inserted into for conductor terminal 14
132, electrode hole 131 is connected to wire guide 132, and conductor terminal 14 and electrode 12 connect inside electrode support 13；Electrode support
13 opposite two sides are equipped with the straight slot 133 being internally recessed, and slot bottom is equipped with the through-hole 134 of connection both sides straight slot 133.
The both sides that capping 2 is connect with electrode support 13 before air chamber are equipped with outwardly projecting convex block 21, and convex block 21 is equipped with
The through-hole 211 of front and back perforation；The both sides that air chamber rear seal-cover 3 is connect with electrode support 13 are equipped with outwardly projecting convex block 31, convex
Block is equipped with the through-hole 311 of front and back perforation；Air chamber rear seal-cover 3 is equipped with the straight slot being mutually parallel close to the face of 11 layers of heating wire
32, straight slot 32 or so penetrates through, and the positions and dimensions of straight slot 32 are corresponding with electrode 12；Groove 33, pumping are equipped between straight slot 32
Mouth 5 is located at 33 center of groove, and bleeding point 5 runs through air chamber rear seal-cover 3.
12 surface of electrode is equipped with several winding slots 121 being spaced substantially equidistant, and both ends are equipped with for being connect with conductor terminal 14
Groove 122；Heating wire 11 is wrapped in winding slot 122, and 11 both ends of heating wire are fixedly connected on electrode 12；11 layers of heating wire
It is set to the unilateral side of electrode 12；Two adjacent 11 spacing of heating wire are 0.5-1.5mm in 11 layers of heating wire.
12 both ends of electrode are connect with conductor terminal 14 respectively, wherein conductor terminal 14 Yu electrode 12 conducting of one end, another
The conductor terminal 14 at end insulate with electrode 12, and the junction of one of them conductor terminal 14 to insulate with electrode 12 and electrode 12 fills
There is thermocouple, for the installation of TC in the groove 122 of electrode 12, the lead of thermocouple is connected to the conductor wire end to insulate with electrode 12
On son 14.
In use, the first step, prepares detecting instrument and thermal desorption device, checks detecting instrument and thermal desorption device
And debugging.
Thermal desorption device is connect, wherein the conducting wire being connected to electrode 12 on thermal desorption device by second step with detecting instrument
The terminal that terminal 14 and detecting instrument are used to heat power supply is connect, on thermal desorption device with the conductor terminal 14 of the insulation of electrode 12 and
Terminal for measuring temperature connects, and bleeding point 5 is connected to the air inlet 4 of instrument host.
Third walks, and takes the wiping sampling of test paper 6, test paper 6 is then put into thermal desorption device air inlet 4, is sampled
Facing towards 11 layers of heating wire.
4th step starts detecting instrument, heats and provides voltage on power supply terminal, and the duration is 1-3 seconds, makes heating wire 11
Temperature reaches 190 DEG C -210 DEG C, and the determinand desorption gasification on 6 sampling face of test paper is gathered in air chamber.
5th step, while heating power supply terminal stops providing voltage, detecting instrument is evacuated, and will be desorbed in air chamber
Sample be pumped into detecting instrument, detecting instrument is detected analysis
During pumping, cool exterior air is entered by air inlet 4, and bleeding point 5 takes away hot-air so that device is cold
But；It is for overheat protector that thermocouple, which is arranged,.
In short, the above is only the preferred embodiment of the present invention, it is all according to present utility model application the scope of the claims institute
The equivalent changes and modifications of work should all belong to the covering scope of the utility model patent.
Claims (7)
1. a kind of thermal desorption device for detection and analysis, it is characterised in that：Including covering (2) before heating device (1), air chamber
With air chamber rear seal-cover (3), capping (2) edge and air chamber rear seal-cover (3) are connected with each other before air chamber, heating device (1) peace
It is covered between (2) and air chamber rear seal-cover (3) before air chamber；Heating device (1) include heating wire (11), electrode (12),
Electrode support (13) and conductor terminal (14), wherein electrode (12) are arranged in parallel, electrode (12) both ends respectively with electrode branch
Frame (13) is fixedly connected, and electrode (12) accesses electric current by conductor terminal (14), and heating wire (11) is equidistantly wrapped in electrode
(12) on, heating wire (11) forms heating wire (11) layer between adjacent electrode (12)；(2) left and right ends point are covered before air chamber
It is not fixedly connected with electrode support (13), air chamber rear seal-cover (3) left and right ends are fixedly connected with electrode support (13) respectively, gas
(2), air chamber rear seal-cover (3) and electrode support (13) are covered before body cavity surrounds the flat air chamber to be formed up and down, gas
Body cavity upper and lower ends are equipped with the air inlet (4) that supplied gas enters, and air chamber rear seal-cover (3) is equipped with the bleeding point of supplied gas extraction
(5), there are the gaps being inserted into for test paper (6) between capping (2) and heating device (1) before air chamber.
2. a kind of thermal desorption device for detection and analysis according to claim 1, it is characterised in that：It further include protecgulum
(7) it is fixedly connected with rear cover (8) with rear cover (8), protecgulum (7), heating wire (11), electrode (12), electrode support (13), air chamber
Preceding capping (2) and air chamber rear seal-cover (3) are arranged between protecgulum (7) and rear cover (8)；Protecgulum (7) inner wall is equipped with convex block
(71), rear cover (8) is equipped with through-hole (81), and position is corresponding with conductor terminal (14), and rear cover (8), which is equipped with, is used for fixed gas
Before chamber cover (2), air chamber rear seal-cover (3) and electrode support (13) fixing piece (82).
3. a kind of thermal desorption device for detection and analysis according to claim 1, it is characterised in that：Electrode support (13)
The wire guide (132) that both ends are equipped with the electrode hole (131) that power pole (12) is inserted into and are inserted into for conductor terminal (14), electrode hole
(131) it is connected to wire guide (132), conductor terminal (14) and electrode (12) connect inside electrode support (13)；Electrode support
(13) opposite two sides are equipped with the straight slot (133) being internally recessed, and slot bottom is equipped with the through-hole of connection both sides straight slot (133)
(134)。
4. a kind of thermal desorption device for detection and analysis according to claim 1, it is characterised in that：It is covered before air chamber
(2) both sides being connect with electrode support (13) are equipped with outwardly projecting convex block (21), and convex block (21) is equipped with the logical of front and back perforation
Hole (211)；The both sides that air chamber rear seal-cover (3) is connect with electrode support (13) are equipped with outwardly projecting convex block (31), on convex block
Through-hole (311) equipped with front and back perforation；Air chamber rear seal-cover (3) is logical equipped with what is be mutually parallel close to the face of heating wire (11) layer
Slot (32), the perforation of straight slot (32) left and right, the positions and dimensions of straight slot (32) are corresponding with electrode (12)；Straight slot is equipped between (32)
Groove (33), bleeding point (5) are located at groove (33) center, and bleeding point (5) runs through air chamber rear seal-cover (3).
5. a kind of thermal desorption device for detection and analysis according to claim 1, it is characterised in that：Electrode (12) surface
Equipped with several winding slots (121) being spaced substantially equidistant, both ends are equipped with the groove (122) for being connect with conductor terminal (14)；Electricity
Heated filament (11) is wrapped in winding slot (121), and heating wire (11) both ends are fixedly connected on electrode (12)；Heating wire (11) layer is set
It is placed in the unilateral side of electrode (12), two adjacent heating wire (11) spacing are 0.5-1.5mm in heating wire (11) layer.
6. a kind of thermal desorption device for detection and analysis according to claim 5, it is characterised in that：Electrode (12) both ends
It is connect respectively with conductor terminal (14), wherein conductor terminal (14) Yu electrode (12) conducting of one end, the conductor terminal of the other end
(14) it insulate with electrode (12), one of them is equipped with the conductor terminal (14) of electrode (12) insulation and the junction of electrode (12)
Thermocouple, in the groove (122) of electrode (12), the lead of thermocouple is connected to leads the installation of TC with what electrode (12) insulated
In line terminals (14).
7. a kind of thermal desorption device for detection and analysis according to claim 2, it is characterised in that：On rear cover (8)
Fixing piece (82) is symmetrical set on the face close to air chamber rear seal-cover (3), and fixing piece (82) includes the convex of outwardly convex
Platform and with boss surface straight-bar connected vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721876494.5U CN207689254U (en) | 2017-12-28 | 2017-12-28 | A kind of thermal desorption device for detection and analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721876494.5U CN207689254U (en) | 2017-12-28 | 2017-12-28 | A kind of thermal desorption device for detection and analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207689254U true CN207689254U (en) | 2018-08-03 |
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ID=62993094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201721876494.5U Active CN207689254U (en) | 2017-12-28 | 2017-12-28 | A kind of thermal desorption device for detection and analysis |
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| CN (1) | CN207689254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433191A (en) * | 2021-03-17 | 2021-09-24 | 江苏甫瑞微纳传感科技有限公司 | Ring heating type gas sensor and preparation method thereof |
-
2017
- 2017-12-28 CN CN201721876494.5U patent/CN207689254U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433191A (en) * | 2021-03-17 | 2021-09-24 | 江苏甫瑞微纳传感科技有限公司 | Ring heating type gas sensor and preparation method thereof |
| CN113433191B (en) * | 2021-03-17 | 2024-01-16 | 江苏甫瑞微纳传感科技有限公司 | Annular heating type gas sensor and preparation method thereof |
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