CN208937547U - A kind of thermal desorption gas sample injection device and system - Google Patents
A kind of thermal desorption gas sample injection device and system Download PDFInfo
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- CN208937547U CN208937547U CN201821272832.9U CN201821272832U CN208937547U CN 208937547 U CN208937547 U CN 208937547U CN 201821272832 U CN201821272832 U CN 201821272832U CN 208937547 U CN208937547 U CN 208937547U
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- 238000003795 desorption Methods 0.000 title claims abstract description 56
- 238000002347 injection Methods 0.000 title claims abstract description 6
- 239000007924 injection Substances 0.000 title claims abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 90
- 239000012159 carrier gas Substances 0.000 claims abstract description 47
- 238000005070 sampling Methods 0.000 claims description 34
- 230000001276 controlling effect Effects 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a kind of thermal desorption gas sample injection device and system, which includes the first control valve, the second control valve, first flow adjuster, second flow adjuster, triple valve, six-way valve, quantitative loop and control module；Wherein, the flow for adjusting carrier gas and sample gas respectively is adjusted by first flow adjuster and second flow adjuster, the state of the first control valve, the second control valve, triple valve and six-way valve and the holding duration of state are controlled by control module again, realizes that the quantitative and quantitative loop of any amount for thermal desorption sample cell sample introduction is quantitative.Therefore, the thermal desorption gas sample injection device structure of the utility model is simple, easy to use, compared with loading quantitative loop input mode manually, can more guarantee precision of analysis.
Description
Technical Field
The utility model relates to a gas chromatograph pretreatment technical field, in particular to gaseous sampling device of thermal desorption and system.
Background
In the pretreatment technology of the gas chromatograph, thermal desorption is a treatment means for extracting a sample in an adsorption tube by using gas in a heating mode, and the thermal desorption is not suitable for an organic solvent and has a good extraction effect, so that the thermal desorption is combined with the gas chromatograph or the gas chromatograph-mass spectrometer, the thermal desorption and the gas chromatograph-mass spectrometer are widely used for detecting various organic matters, and the targeted sample is mainly gas, especially volatile organic matters in air, and almost is a necessary technology for environment monitoring.
For gas chromatography, since the sample is a gas, the properties of the corresponding sample in all respects should also be as consistent as possible with the sample, in other words, the sample is also preferably a gas. Therefore, the sample gas in the steel cylinder is quantitatively transferred to the thermal desorption sample tube, and the thermal desorption sample tube can retain the required components. At present, a manual loading quantitative ring sample feeding mode is mainly adopted, if the mode is adopted, the thermal desorption sample tube must be blown by inert gas, so that the added sample gas is adsorbed by the adsorbent in the thermal desorption sample tube, and the sample gas can be exposed and possibly polluted in the manual loading quantitative ring and inert gas blowing process, thereby influencing the accuracy of an analysis result.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: provides a thermal desorption gas sample introduction device with simple structure and convenient use.
In order to realize the above utility model purpose, the utility model discloses a technical scheme be:
the utility model provides a thermal desorption gas sampling device which characterized in that includes: the device comprises a first control valve, a second control valve, a first flow regulator, a second flow regulator, a three-way valve, a six-way valve, a quantitative ring and a control module; wherein,
the first flow regulator is used for regulating the flow of the introduced carrier gas; the first flow regulator is connected to the first port of the six-way valve through a first carrier gas delivery branch and to the first input port of the three-way valve through a second carrier gas delivery branch, and the first control valve is disposed on the first carrier gas delivery branch and the second control valve is disposed on the second carrier gas delivery branch;
the second flow regulator is used for regulating the flow of the introduced sample gas; an output port of the second flow regulator is communicated with a second input port of the three-way valve; the output port of the three-way valve is communicated with the third port of the six-way valve;
two ports of the dosing ring are connected to a second port and a fifth port of the six-way valve, respectively; the fourth port and the sixth port of the six-way valve are respectively used for communicating a sample tube;
the control module is used for firstly controlling the first control valve and the second control valve to be in a turn-off state, controlling the three-way valve to be in a state of communicating a second input port with an output port, controlling the six-way valve to be in a state of communicating a third port with a second port, controlling the fifth port with a fourth port and controlling the first port with a sixth port, keeping a first duration, and then controlling the first control valve and the second control valve to be in a conducting state, controlling the three-way valve to be in a state of communicating the first input port with the output port, controlling the six-way valve to be in a state of communicating the first port with the second port, controlling the fifth port with the sixth port and controlling the third port with the fourth port to be in a communicating state, and keeping a second duration; wherein the second duration is greater than the first duration.
According to a specific embodiment, in the thermal desorption gas sampling device of the present invention, the control module comprises a first time controller and a second time controller; wherein the first time controller is used for controlling the states of the three-way valve and the six-way valve; the second time controller is used for controlling the states of the first control valve and the second control valve.
Further, the first flow regulator is also used for monitoring the flow of carrier gas and displaying the monitored carrier gas flow data; the second flow regulator is also configured to monitor the flow of the sample gas and display the monitored sample gas flow data.
Further, the utility model discloses thermal desorption gas sampling device is still including being used for control first time controller with the starting switch of second time controller's power.
Furthermore, in the thermal desorption gas sample introduction device of the utility model, the control module further comprises a main controller and an input device; the input device is used for inputting first flow control data, second flow control data and sample volume data of the sample gas; the main controller is used for respectively controlling the flow regulated by the first flow regulator and the second flow regulator according to the first flow control data and the second flow control data input by the input equipment, obtaining first duration data according to the sample volume data and the first flow control data input by the input equipment, obtaining second duration data according to the first duration data, transmitting the first duration data to the first time controller, and transmitting the second duration data to the second time controller.
According to a specific embodiment, the thermal desorption gas sampling device of the utility model further comprises a first pressure stabilizing valve and a second pressure stabilizing valve; wherein the first pressure maintaining valve is used for stabilizing the pressure of the carrier gas transmitted to the first flow regulator; the second pressure maintaining valve is used for stabilizing the pressure of the sample gas transmitted to the second flow regulator.
The utility model also provides a thermal desorption gas sampling system, which comprises a carrier gas source, a sample gas source and the thermal desorption gas sampling device of the utility model; the carrier gas source and the sample gas source are used for respectively providing carrier gas and sample gas for the thermal desorption gas sampling device.
Further, the utility model discloses a gaseous sampling system of thermal desorption still includes the sample cell mount that is used for placing the sample cell.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a thermal desorption gas sample introduction device, which comprises a first control valve, a second control valve, a first flow regulator, a second flow regulator, a three-way valve, a six-way valve, a quantitative ring and a control module; the flow of the carrier gas and the flow of the sample gas are respectively adjusted through the first flow regulator and the second flow regulator, and then the states of the first control valve, the second control valve, the three-way valve and the six-way valve and the holding time of the states are controlled through the control module, so that the quantitative and quantitative loop quantitative analysis of any sample amount of the thermal desorption sample tube is realized. Therefore, the utility model discloses a gaseous sampling device of thermal desorption simple structure, convenient to use compares with manual loading ration ring sampling mode, more can guarantee the accuracy of analysis result.
Description of the drawings:
FIG. 1 is a schematic diagram of the control relationship of the apparatus of the present invention;
FIG. 2 is a schematic view of the gas circuit connection of the device of the present invention;
FIG. 3 is a schematic diagram of an embodiment of the control relationship of the apparatus of the present invention;
FIG. 4 is a schematic diagram of another embodiment of the control relationship of the apparatus of the present invention;
FIG. 5 is a schematic diagram of the gas circuit connection of the system of the present invention;
fig. 6 is a schematic diagram of the process of the present system in continuous fill mode;
fig. 7 is a schematic diagram of the process of the present system in a quantitative fill mode.
List of reference numerals
1-thermal desorption gas sampling device, 101-first control valve, 102-second control valve, 103-three-way valve, 104-six-way valve, 105-quantitative ring, 106-first pressure maintaining valve, 107-first flow regulator, 108-second pressure maintaining valve, 109-second flow regulator, 2-carrier gas steel cylinder, 3-standard gas steel cylinder, 4-sample tube fixing frame and 5-sample tube.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
As shown in fig. 1 and fig. 2, the utility model discloses a thermal desorption gas sampling device, it includes: a first control valve 101, a second control valve 102, a first flow regulator 107, a second flow regulator 109, a three-way valve 103, a six-way valve 104, a dosing ring 105 and a control module.
The first flow regulator 107 is used to regulate the flow rate of the carrier gas introduced. Furthermore, the first flow regulator 107 is connected to the first port of the six-way valve 104 through a first carrier gas delivery branch, and to the first input port of the three-way valve 103 through a second carrier gas delivery branch. Meanwhile, a first control valve 101 is arranged on the first carrier gas transmission branch to control the on-off of the first carrier gas transmission branch, and a second control valve 102 is arranged on the second carrier gas transmission branch to control the on-off of the second carrier gas transmission branch.
The second flow regulator 109 is used to regulate the flow of the introduced sample gas. Also, the output port of the second flow regulator 109 communicates with the second input port of the three-way valve 103, and the output port of the three-way valve 103 communicates with the third port of the six-way valve 104.
Two ports of the dosing ring 105 are connected to the second port and the fifth port of the six-way valve 104, respectively; the fourth port and the sixth port of the six-way valve 104 are respectively used for communicating with sample tubes.
The control module is used for controlling the first control valve 101 and the second control valve 102 to be in a turn-off state, the three-way valve 103 to be in a state that a second input port is communicated with an output port, the six-way valve 104 to be in a state that a third port is communicated with a second port, a fifth port is communicated with a fourth port and a first port is communicated with a sixth port, keeping a first duration T1, then controlling the first control valve 101 and the second control valve 102 to be in a turn-on state, the three-way valve 103 to be in a state that the first input port is communicated with the output port, the six-way valve 104 to be in a state that the first port is communicated with the second port, the fifth port is communicated with the sixth port and the third port is communicated with the fourth port, and keeping a second duration T2; wherein the second time period T2 is greater than the first time period T1.
The utility model discloses among the gaseous sampling device of thermal desorption, control module accomplishes the settlement of time T2 when T1 and the second during first time through the corresponding control parameter of configuration.
As shown in fig. 2, in order to more effectively realize the flow regulation, the thermal desorption gas sampling device of the present invention further comprises a first pressure maintaining valve 106 and a second pressure maintaining valve 108. Wherein the first pressure maintaining valve 106 is used for stabilizing the pressure of the carrier gas delivered to the first flow regulator 107; the second pressure maintaining valve 108 serves to stabilize the pressure of the sample gas transmitted to the second flow regulator 109.
As shown in fig. 3, in the thermal desorption gas sample introduction device of the present invention, the control module includes a first time controller and a second time controller. The first time controller is used for controlling the states of the three-way valve and the six-way valve; the second time controller is used for controlling the states of the first control valve and the second control valve.
Further, the utility model discloses a gaseous sampling device of thermal desorption still includes starting switch. Furthermore, the start switch is used for controlling the power supply of the first time controller and the second time controller. Specifically, the power supplies of the first time controller and the second time controller can be supplied by a storage battery, and can also be supplied by connecting a power adapter with a socket. When the starting switch is closed, the first time controller and the second time controller simultaneously acquire the power supply, and after the first time controller and the second time controller are started, the first time controller and the second time controller work according to respective set parameters to realize the control of the first control valve, the second control valve, the three-way valve and the six-way valve.
The utility model discloses an among the thermal desorption gas sampling device, first control valve, second control valve, three-way valve and six-way valve are the automatically controlled executor commonly used. Wherein, the first control valve and the second control valve are both solenoid valves.
The utility model discloses a gaseous sampling device during operation of thermal desorption, in order to realize the ration to the gaseous sample injection volume of sample, need set for first time length T1 and sample gas flow, consequently, first flow regulator and second flow regulator need choose for use the electron flow regulator that has the monitoring and show the flow function.
Specifically, the worker adjusts the flow rate of the sample gas by adjusting the second flow rate adjuster, and sets an appropriate sample gas flow rate by combining the flow rate data of the sample gas displayed on the electronic flow rate adjuster, so that the first time period T1 can be calculated by combining the required sample introduction amount and the set sample gas flow rate. And finally, setting the time parameters by operating a key on the first time controller. After the first time length T1 is calculated, the operator only needs to purge the carrier gas for a time longer than the time for introducing the sample gas according to the empirical value obtained in the actual operation, and therefore, a time parameter longer than the first time length T1, that is, a time parameter corresponding to the second time length T2, is set on the second time controller.
Of course, those skilled in the art will also appreciate that the electronic flow regulator may be replaced with a conventional flow regulator in conjunction with a flow meter to achieve equivalent functionality.
As shown in fig. 4, in the thermal desorption gas sample introduction device of the present invention, the control module further comprises a main controller and an input device. Further, the input device is used for inputting the first flow control data, the second flow control data, and the sample amount data of the sample gas. The main controller is used for respectively controlling the flow regulated by the first flow regulator and the second flow regulator according to the first flow control data and the second flow control data input by the input equipment, obtaining first duration data according to the sample volume data and the first flow control data input by the input equipment, obtaining second duration data according to the first duration data, transmitting the first duration data to the first time controller, and transmitting the second duration data to the second time controller.
Specifically, the first flow regulator and the second flow regulator adopted in this embodiment are both electrically controlled flow regulators, the adopted time controller has a parameter configuration interface, and the main controller is connected with the parameter configuration interface of the time controller to complete transmission and configuration of the duration data.
The input device adopted in the embodiment is a keyboard, and the main controller can be developed based on a single chip microcomputer or a microcomputer system, and realizes interactive control of the input device and automatic control of the flow regulator and the time controller.
As shown in fig. 5, the utility model also provides a thermal desorption gas sampling system, it includes carrier gas air supply, standard gas air supply and thermal desorption gas sampling device 1. And the carrier gas source and the standard gas source are used for respectively providing carrier gas and standard gas for the thermal desorption gas sampling device 1. Wherein, the carrier gas source is a steel cylinder 2 filled with carrier gas, and the standard gas source is a steel cylinder 3 filled with standard gas.
Further, for the convenient placement of sample cell, the utility model discloses a gaseous sampling system of thermal desorption still is including the sample cell mount 4 that is used for placing sample cell 5.
As shown in fig. 6, the utility model discloses a gaseous sampling system work of thermal desorption is at continuous filling mode, wherein, places the sample cell on the sample mount, and the fourth port intercommunication of sample cell and six-way valve.
The specific working process is as follows:
a: the flow rates of the carrier gas and the sample gas were adjusted and set.
b: and introducing the sample gas with the first duration into the six-way valve, wherein the sample gas sequentially passes through the third port, the second port, the quantitative ring and the fifth port, and finally enters the sample tube after passing through the fourth port.
c: introducing carrier gas for a second time into the six-way valve, wherein one path of carrier gas enters the sample tube after passing through the third port and the fourth port; the other path of carrier gas sequentially passes through the first port, the second port, the quantitative ring and the fifth port and is finally discharged through the sixth port. The second duration is longer than the first duration, and the first duration is set according to the sample volume and the flow of the sample gas.
Therefore, the utility model discloses a thermal desorption gas sampling system work can realize the ration to the arbitrary volume of thermal desorption sample cell appearance when filling the mode in succession.
As shown in fig. 7, the thermal desorption gas sampling system of the present invention works in a continuous filling mode, wherein the sample tube is placed on the sample holder, and the sample tube is communicated with the sixth port of the six-way valve.
The specific working process is as follows:
A. the flow rates of the carrier gas and the sample gas were adjusted and set.
B: and introducing the sample gas with the first duration into the six-way valve, wherein the sample gas sequentially passes through the third port, the second port, the quantitative ring and the fifth port and is finally discharged through the fourth port.
C: and introducing carrier gas with a second duration into the six-way valve, discharging one path of carrier gas after passing through the third port and the fourth port, and introducing the other path of carrier gas into the sample tube after passing through the first port, the second port, the quantitative ring and the fifth port in sequence and finally passing through the sixth port. Wherein the second duration is greater than the first duration. Also, as long as the first period of time is sufficient to fill the quantification ring with sample gas.
Therefore, the utility model discloses a thermal desorption gas sampling system work can realize the quantitative ring ration to the thermal desorption sample cell advance kind when filling the mode in succession.
While the present invention has been described in detail with reference to the embodiments, the present invention is not limited to the embodiments, and various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the claims of the present application.
Claims (8)
1. The utility model provides a thermal desorption gas sampling device which characterized in that includes: the device comprises a first control valve, a second control valve, a first flow regulator, a second flow regulator, a three-way valve, a six-way valve, a quantitative ring and a control module; wherein,
the first flow regulator is used for regulating the flow of the introduced carrier gas; the first flow regulator is connected to the first port of the six-way valve through a first carrier gas delivery branch and to the first input port of the three-way valve through a second carrier gas delivery branch, and the first control valve is disposed on the first carrier gas delivery branch and the second control valve is disposed on the second carrier gas delivery branch;
the second flow regulator is used for regulating the flow of the introduced sample gas; an output port of the second flow regulator is communicated with a second input port of the three-way valve; the output port of the three-way valve is communicated with the third port of the six-way valve;
two ports of the dosing ring are connected to a second port and a fifth port of the six-way valve, respectively; the fourth port and the sixth port of the six-way valve are respectively used for communicating a sample tube;
the control module is used for firstly controlling the first control valve and the second control valve to be in a turn-off state, controlling the three-way valve to be in a state of communicating a second input port with an output port, controlling the six-way valve to be in a state of communicating a third port with a second port, controlling the fifth port with a fourth port and controlling the first port with a sixth port, keeping a first duration, and then controlling the first control valve and the second control valve to be in a conducting state, controlling the three-way valve to be in a state of communicating the first input port with the output port, controlling the six-way valve to be in a state of communicating the first port with the second port, controlling the fifth port with the sixth port and controlling the third port with the fourth port to be in a communicating state, and keeping a second duration; wherein the second duration is greater than the first duration.
2. The thermal desorption gas sampling device of claim 1, wherein the control module comprises a first time controller and a second time controller; wherein the first time controller is used for controlling the states of the three-way valve and the six-way valve; the second time controller is used for controlling the states of the first control valve and the second control valve.
3. The thermal desorption gas sampling device of claim 2, wherein the first flow regulator is further configured to monitor the flow rate of the carrier gas and display the monitored flow rate data of the carrier gas; the second flow regulator is also configured to monitor the flow of the sample gas and display the monitored sample gas flow data.
4. The thermal desorption gas sampling device of claim 2, further comprising a start switch for controlling the power supply of the first time controller and the second time controller.
5. The thermal desorption gas sampling device of claim 2, wherein the control module further comprises a main controller and an input device; the input device is used for inputting first flow control data, second flow control data and sample volume data of the sample gas; the main controller is used for respectively controlling the flow regulated by the first flow regulator and the second flow regulator according to the first flow control data and the second flow control data input by the input equipment, obtaining first duration data according to the sample volume data and the first flow control data input by the input equipment, obtaining second duration data according to the first duration data, transmitting the first duration data to the first time controller, and transmitting the second duration data to the second time controller.
6. The thermal desorption gas sampling device of claim 1, further comprising a first pressure maintaining valve and a second pressure maintaining valve; wherein the first pressure maintaining valve is used for stabilizing the pressure of the carrier gas transmitted to the first flow regulator; the second pressure maintaining valve is used for stabilizing the pressure of the sample gas transmitted to the second flow regulator.
7. A thermal desorption gas sample injection system, which is characterized by comprising a carrier gas source, a sample gas source and a thermal desorption gas sample injection device according to any one of claims 1 to 6; the carrier gas source and the sample gas source are used for respectively providing carrier gas and sample gas for the thermal desorption gas sampling device.
8. The thermal desorption gas sampling system of claim 7, further comprising a sample tube holder for holding a sample tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821272832.9U CN208937547U (en) | 2018-08-08 | 2018-08-08 | A kind of thermal desorption gas sample injection device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821272832.9U CN208937547U (en) | 2018-08-08 | 2018-08-08 | A kind of thermal desorption gas sample injection device and system |
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| Publication Number | Publication Date |
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| CN208937547U true CN208937547U (en) | 2019-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821272832.9U Withdrawn - After Issue CN208937547U (en) | 2018-08-08 | 2018-08-08 | A kind of thermal desorption gas sample injection device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732287A (en) * | 2018-08-08 | 2018-11-02 | 成都科林分析技术有限公司 | A kind of thermal desorption gas sample injection device and method |
-
2018
- 2018-08-08 CN CN201821272832.9U patent/CN208937547U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108732287A (en) * | 2018-08-08 | 2018-11-02 | 成都科林分析技术有限公司 | A kind of thermal desorption gas sample injection device and method |
| CN108732287B (en) * | 2018-08-08 | 2024-01-12 | 成都科林分析技术有限公司 | Thermal desorption gas sampling device and method |
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