CN209708940U - Thermal desorption sampling device - Google Patents
Thermal desorption sampling device Download PDFInfo
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- CN209708940U CN209708940U CN201920824918.6U CN201920824918U CN209708940U CN 209708940 U CN209708940 U CN 209708940U CN 201920824918 U CN201920824918 U CN 201920824918U CN 209708940 U CN209708940 U CN 209708940U
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- thermal desorption
- sampling device
- stepper motor
- upper housing
- hole
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Abstract
The utility model discloses thermal desorption sampling device, thermal desorption sampling device includes upper housing, lower case, Thermal desorption block, sample introduction mechanism and the push-pull mechanism for being installed on inner space under the upper housing and the lower case closed state, the sample introduction mechanism includes circuit board and guide groove, square hole is provided on the circuit board, the guide groove is installed in square hole, and the hole passed through for sampling test paper is provided on the guide groove；The push-pull mechanism includes stepper motor and top, the top is fixed by a pin on the stepper motor, the stepper motor is fixed by screws in upper housing surface, opened on the Thermal desorption block there are two cylindrical mounting hole be used to heating rod and temperature sensor are installed.The thermal desorption sampling device injection port of utility model is in closed state, to be not easy into dust and water vapour.
Description
Technical field
The utility model relates to live trace detection technical fields, especially thermal desorption sampling device.
Background technique
According to the principle of ion mobility spectrometry (IMS), IMS is primarily adapted for use in the detection of gaseous sample, but in practical application,
If IMS is widely used in explosive and illicit drugs inspection field, explosive or drugs sample are largely in solid sample or liquid phase state,
Therefore how sample to be effectively rapidly converted into gas phase by solid phase or liquid phase, and introducing IMS system to carry out detection is IMS reality
One of problem overcome is needed in.Ion mobility spectrometry (IMS) is migrated in the electric field based on gaseous ion different in gas phase
The difference of speed is come an analytical technology being characterized to chemical ion substance.Sample is using sampling test paper from being sampled object
Then upper acquirement brings sample the gasification of into Thermal desorption room by sampling testing paper, finally the gas of sample is sent into migration tube and is ionized,
Currently available technology, which has using Immunohistochemistry, realizes Thermal desorption sample introduction, although this method has small in size, isolation water vapour
The advantages that, but semi-permeable membrane is restorative very poor, and there are also the devices for using integral type heating means, there is small in size, sample introduction conveniently,
But the device injection port is in opening-wide state always, is easy into dust and water vapour.
Utility model content
The utility model is easy to propose thermal desorption sampling device into ash for thermal analysis apparatus in the prior art, the pyrolysis
Analysis sampling device is in closed state, to be not easy into ash.
The technical solution of the utility model is as follows:
Thermal desorption sampling device, including upper housing, lower case, it is installed on the upper housing and the lower case closed state
Thermal desorption block, sample introduction mechanism and the push-pull mechanism of lower inner space, the sample introduction mechanism include circuit board and guide groove, the circuit
Square hole is provided on plate, the guide groove is installed in square hole, and the hole passed through for sampling test paper is provided on the guide groove；It is described to push away
Drawing mechanism includes stepper motor and top, and the top is fixed by a pin on the stepper motor, and the stepper motor is logical
Cross screw and be fixed on upper housing surface, opened on the Thermal desorption block there are two cylindrical mounting hole be used to heating rod and temperature are installed
Spend sensor.
The section for the one side that above-mentioned top is bonded with Thermal desorption block is triangle.
Air inlet pipe fitting and outlet pipe fitting are connected on above-mentioned Thermal desorption block, the air inlet pipe joint location is higher than escape pipe
Connector.
There is certain activity between above-mentioned top and the screw rod of the stepper motor.
It is provided with groove on above-mentioned top, there is protrusion on the upper housing, it is convex on the groove and upper housing on the top
It rises and matches.
It is provided with round hole on above-mentioned guide groove, a pair of of infrared sensor, described two infrared biographies are installed on the circuit board
Sensor penetrates round hole arranged opposite.
Above-mentioned push-pull mechanism further includes stepping motor bracket and heat insulation support column, and screw sequentially passes through in stepping motor bracket
Hole and the heat insulation support axis of a cylinder heart at hole be fixed on the upper housing surface, the stepper motor is by screw by stepper motor
It is fixed in stepping motor bracket.
It further, further include overtemperature protector, the overtemperature protector is close to Thermal desorption block.
The utility model has the beneficial effects that the thermal desorption sampling device injection port of the utility model is in closed state, from
And it is not easy into dust and water vapour.
Detailed description of the invention
Fig. 1 is the utility model thermal desorption sampling device sectional view；
Fig. 2 is the utility model thermal desorption sampling device explosive view.
In figure: 1- upper housing, 2- lower case, 3- Thermal desorption block, 31- temperature sensor, 32- heating rod, 33- overheat protector
Device, 41- outlet pipe fitting, 42- air inlet pipe fitting, 5- feeding mechanism, 51- circuit board, 52- guide groove, 53- infrared sensor, 6-
Push-pull mechanism, 61- stepper motor, the top 62-, 63- pin, 64- stepping motor bracket, 65- heat insulation support column, 7- sampling examination
Paper.
Specific embodiment
In order to better illustrate the utility model, it is further described now in conjunction with examples and drawings.
As shown in Figure 1 to Figure 2, thermal desorption sampling device includes upper housing 1, lower case 2, is installed on upper housing 1 and lower casing
The Thermal desorption block 3, sample introduction mechanism 5 and push-pull mechanism 6 of inner space under 2 closed state of body, sample introduction mechanism 5 include 51 He of circuit board
Guide groove 52 is provided with square hole on circuit board 51, and guide groove 52 is installed in square hole, is provided on guide groove 52 and passes through for sampling test paper 7
Hole.Push-pull mechanism 6 includes stepper motor 61 and top 62, and top 62 is fixed on stepper motor 61 by pin 63, stepping
Motor 61 is fixed by screws in 1 surface of upper housing, opened on Thermal desorption block 3 there are two cylindrical mounting hole be used to heating is installed
Stick 31 and temperature sensor 32, heating rod 31 can be accurately anti-for rapid and uniform heating Thermal desorption block 3, temperature sensor 32
Present the temperature of Thermal desorption block 3；Preferably, the section for the one side that top 62 is bonded with Thermal desorption block 3 is triangle, to guarantee to come directly towards
62 contact with Thermal desorption block 3 for line, just can guarantee that sampling 7 contact surface of test paper is small and can seal in this way.Be connected on Thermal desorption block 3 into
Gas-tpe fitting 42 and outlet pipe fitting 41,42 position of air inlet pipe fitting is higher than outlet pipe fitting 41, this ensures that air-flow exists
When flowing through the sampling test paper 7 for carrying sample, air-flow is to flow from top to bottom, to bring more sample gas into.Top 62 and institute
Stating has certain activity between the screw rod of stepper motor 61, guarantee that the sampling test paper of sample can be tightly pressed against heat by top 62
Resolution block 3, to guarantee air-tightness.The package of Thermal desorption block 3 is fixed by upper housing 1 with lower case 2, upper housing 1 and lower casing
Body 2 plays the role of fixed and keeps the temperature.
Preferably, it is provided with round hole on guide groove 52, a pair of of infrared sensor 53, two infrared biographies are installed on circuit board 51
Sensor 53 penetrates round hole arranged opposite, and guide groove 52 plays the role of guidance sampling test paper 7 and enters Thermal desorption block 3.On top 62
It is provided with groove, there is protrusion on upper housing 1, the groove on top 62 matches with the protrusion on upper housing 1, guarantees stepper motor 61
In the rotation, top 62 can be for linear motion along the protrusion on upper housing 1.
As shown in Fig. 2, screw is successively specifically, push-pull mechanism 6 further includes stepping motor bracket 64 and heat insulation support column 65
1 surface of upper housing, stepper motor 61 are fixed in the hole at 65 axle center of hole and heat insulation support column in stepping motor bracket 64
Stepper motor 61 is fixed in stepping motor bracket 64 by screw.
Being pyrolyzed hot sampling device further includes overtemperature protector 33, and overtemperature protector 33 is close to Thermal desorption block 3, is guaranteed in temperature
Disconnecting circuit is when more than preset value to guarantee safety.
Top 62 and guide groove 52 use polytetrafluoroethylene (PTFE) material, can guarantee the heatproof of thermal desorption sampling device with
And keep smooth effect.Upper housing 1, lower case 2 and heat insulation support column 65 are all made of polyether-ether-ketone (PEEK) material, Neng Goubao
Demonstrate,prove good heat-insulating property.Stepping motor bracket 64 uses aluminium material, has the advantages that light weight and easy for installation.Thermal desorption
Block 3 uses SUS304 material, guarantees that Thermal desorption block 3 is corrosion-resistant and good conductive force.Outlet pipe fitting 41 and air inlet pipe connect
First 42 use miniature quick coupling, are all made of polytetrafluoroethylene (PTFE) material, can guarantee the clean of air-tightness and inner air path
Only.
The workflow of the utility model is as follows:
The sampling test paper 7 for obtaining sample is inserted into guide groove 52, the guidance sampling test paper 7 of guide groove 52 enters in Thermal desorption block 3.
During sampling insertion guide groove 52 of test paper 7, the infrared sensor 53 on circuit board 51 detects will after signal changes
Signal passes to MPU, issues instruction by MPU and pulls open stepper motor 61 so that have between Thermal desorption block 3 and top 62 one section away from
From sampling test paper 7 just can smoothly enter into sample injector.Stepper motor 61 pushes top 62 again after sampling test paper 7 and entering sample injector
Sampling test paper 7 is clamped, to form closed space.Heat on Thermal desorption block 3 can will sample the sample on test paper 7 and gasify,
Again the sample of gasification is brought into migration tube to realize sample introduction by the air-flow for entering Thermal desorption block 3.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Made any modification, equivalent replacement or improvement etc., should be included in the guarantor of the utility model within novel spirit and principle
It protects in range.
Claims (8)
1. thermal desorption sampling device, it is characterised in that: including upper housing, lower case, be installed on the upper housing and the lower casing
Thermal desorption block, sample introduction mechanism and the push-pull mechanism of inner space under body closed state, the sample introduction mechanism include circuit board and lead
Slot is provided with square hole on the circuit board, and the guide groove is installed in square hole, is provided on the guide groove and passes through for sampling test paper
Hole；The push-pull mechanism includes stepper motor and top, and the top is fixed by a pin on the stepper motor, described
Stepper motor is fixed by screws in upper housing surface, opened on the Thermal desorption block there are two cylindrical mounting hole be used to install
Heating rod and temperature sensor.
2. thermal desorption sampling device according to claim 1, it is characterised in that: described to come directly towards the one side being bonded with Thermal desorption block
Section be triangle.
3. thermal desorption sampling device according to claim 1, it is characterised in that: be connected to air inlet pipe fitting on the Thermal desorption block
With outlet pipe fitting, the air inlet pipe joint location is higher than outlet pipe fitting.
4. thermal desorption sampling device according to claim 1, it is characterised in that: the screw rod of the top and the stepper motor
Between have certain activity.
5. thermal desorption sampling device according to claim 1, it is characterised in that: be provided with groove, the upper casing on the top
There is protrusion on body, the protrusion on groove and upper housing on the top matches.
6. thermal desorption sampling device according to claim 1, it is characterised in that: be provided with round hole, the electricity on the guide groove
A pair of of infrared sensor is installed, described two infrared sensors penetrate round hole arranged opposite on the plate of road.
7. thermal desorption sampling device according to claim 1, it is characterised in that: the push-pull mechanism further includes stepper motor branch
Frame and heat insulation support column, screw sequentially passes through the hole in stepping motor bracket and the hole at the heat insulation support axis of a cylinder heart be fixed on it is described
Stepper motor is fixed in stepping motor bracket by upper housing surface, the stepper motor by screw.
8. thermal desorption sampling device according to claim 1, it is characterised in that: further include overtemperature protector, the excess temperature is protected
It protects device and is close to Thermal desorption block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824918.6U CN209708940U (en) | 2019-06-03 | 2019-06-03 | Thermal desorption sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920824918.6U CN209708940U (en) | 2019-06-03 | 2019-06-03 | Thermal desorption sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209708940U true CN209708940U (en) | 2019-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920824918.6U Active CN209708940U (en) | 2019-06-03 | 2019-06-03 | Thermal desorption sampling device |
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| CN (1) | CN209708940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406184A (en) * | 2020-03-16 | 2021-09-17 | 中国科学院大连化学物理研究所 | In-situ thermal desorption photoionization device for improving mass spectrum drug detection sensitivity |
-
2019
- 2019-06-03 CN CN201920824918.6U patent/CN209708940U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406184A (en) * | 2020-03-16 | 2021-09-17 | 中国科学院大连化学物理研究所 | In-situ thermal desorption photoionization device for improving mass spectrum drug detection sensitivity |
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