阅读说明：本技术 一种多通道进样气相色谱仪 (Multichannel sample introduction gas chromatograph ) 是由 芦志强 朱旺水 丁文科 于 2020-05-11 设计创作，主要内容包括：本发明涉及一种多通道进样气相色谱仪。该多通道进样气相色谱仪,包括进样系统、进样切换系统与检测器,所述进样系统包括受控制器控制的进样选择阀、取样气路、出样气路、定量环、填充柱Ⅰ、填充柱Ⅱ、载气入口与载气出口,所述进样切换系统包括受控制器控制的切换选择阀,所述取样气路的输出端口与进样选择阀连接,所述出样气路的输入端口与进样选择阀连接,所述定量环的输入口与输出口均与进样选择阀连接；该多通道进样气相色谱仪,每组进样系统都相互独立、互不干扰,通过系统控制六通阀的切换实现不同进样系统之间的切换,通过十通阀的切换避免组分之间的干扰,能够同时在线监测两个或两个以上采样点位的甲烷和非甲烷总烃浓度。(The invention relates to a multichannel sample injection gas chromatograph. The multichannel sample introduction gas chromatograph comprises a sample introduction system, a sample introduction switching system and a detector, wherein the sample introduction system comprises a sample introduction selection valve, a sampling gas path, a sample outlet gas path, a quantitative ring, a packing column I, a packing column II, a carrier gas inlet and a carrier gas outlet which are controlled by a controller; this kind gas chromatograph is advanced to multichannel, every group sampling system all mutual independence, mutual noninterference, realize the switching between the different sampling systems through the switching of system control six-way valve, avoid the interference between the component through the switching of ten-way valve, can be simultaneously on-line monitoring two or more than two sampling point position methane and the total hydrocarbon concentration of non-methane.)

1. A multi-channel sample injection gas chromatograph is characterized by comprising a sample injection system, a sample injection switching system and a detector, wherein the sample injection system comprises a sample injection selection valve, a sampling gas circuit, a sample outlet gas circuit, a quantitative ring, a packing column I, a packing column II, a carrier gas inlet and a carrier gas outlet which are controlled by a controller, the sample injection switching system comprises a switching selection valve controlled by the controller, an output port of the sampling gas circuit is connected with the sample injection selection valve, an input port of the sample outlet gas circuit is connected with the sample injection selection valve, an input port and an output port of the quantitative ring are both connected with the sample injection selection valve, an input port and an output port of the packing column I are both connected with the sample injection selection valve, an input port of the packing column II is connected with the sample injection switching system, an input port of the carrier gas outlet is connected with the sample injection selection valve, the output end of the carrier gas inlet is connected with a sample introduction selection valve, and the sample introduction switching system is connected with the detector.

2. A multichannel sample introduction gas chromatograph according to claim 1, characterized in that: the sampling selection valve is provided with a sampling state, a back-blowing state and a sampling state, wherein the sampling back-blowing state is as follows: the sampling gas path is connected with the input port of the quantitative ring through a sampling selection valve, the output port of the quantitative ring is connected with the sample outlet gas path through a sampling selection valve, the number of carrier gas inlets is two, one group of carrier gas inlets are connected with the filling column I through a sampling selection valve and then connected with the carrier gas outlet through the feeding selection valve, the other group of carrier gas inlets are connected with the filling column II through a feeding selection valve, and the filling column II is connected with the sampling switching system; the sample introduction state is as follows: the sampling gas circuit passes through the introduction of a sample selector valve with it connects to go out the appearance gas circuit, the carrier gas entry pass through the introduction of a sample selector valve with the input port connection of ration ring, the output port of ration ring passes through the input port connection of feeding selector valve with packed column I, the output port of packed column I passes through the input port connection of feeding selector valve with packed column II, the output port of packed column II with introduction switching system connects.

3. A multichannel sample introduction gas chromatograph according to claim 2, characterized in that: the sampling system comprises a first sampling system, a second sampling system and a third sampling system, and the feeding selection valve is a ten-way valve.

4. A multichannel sample introduction gas chromatograph according to claim 3, characterized in that: the sampling switching system comprises a first six-way valve and a second six-way valve, and the first six-way valve and the second six-way valve have two states, namely a first state: 1. the No. 2 port is communicated with each other; 3. the No. 4 port is communicated with the other port; 5. the No. 6 port is communicated with the other port; and a second state: 2. the No. 3 ports are communicated; 4. the No. 5 ports are communicated; 1. no. 6 mouths communicate with each other, No. 6 mouths of first six-way valve are connected with No. 5 mouths of second six-way valve, No. 4 mouths of second six-way valve are connected with the detector, first sampling system is connected with No. 1 mouth of first six-way valve, second sampling system is connected with No. 5 mouths of first six-way valve, third sampling system is connected with No. 3 mouths of second six-way valve.

5. The multichannel sample introduction gas chromatograph of claim 4, wherein: and any one of the first sample feeding system, the second sample feeding system and the third sample feeding system enters a sample feeding state, and the other two sample feeding systems enter a sampling and back blowing state.

6. The multichannel sample introduction gas chromatograph of claim 5, wherein: when the first sample introduction system is in a sample introduction state, the first six-way valve and the second six-way valve are in a state two; when the second sample introduction system is in a sample introduction state, the first six-way valve is in a first state, and the second six-way valve is in a second state; and when the third sample feeding system is in a sample feeding state, the first six-way valve and the second six-way valve are in a first state.

7. The multichannel sample introduction gas chromatograph of claim 6, wherein: the detector comprises an FID detector, and an air inlet and a hydrogen inlet which are communicated with the FID detector.

Technical Field

The invention belongs to the technical field of chromatograph detection, and particularly relates to a multichannel sample injection gas chromatograph.

Background

A chromatograph is an apparatus for performing chromatographic separation analysis. Comprises a sample introduction system, a detection system, a recording and data processing system, a temperature control system, a mobile phase control system and the like. Modern chromatographs have the characteristics of high stability, sensitivity, versatility, high degree of automation and the like. There are gas chromatography, liquid chromatography, gel chromatography, and the like. These chromatographs are widely used for analyzing a certain content of a chemical product and a high molecular material, and gel chromatography can also measure the molecular weight and the distribution of the high molecular material; the traditional gas chromatograph cannot realize the switching of a plurality of sample introduction systems, is low in working efficiency and cannot well adapt to complex working requirements.

Disclosure of Invention

The invention aims to solve the problems and provide a multi-channel sample injection gas chromatograph which is simple in structure and reasonable in design.

The invention realizes the purpose through the following technical scheme:

a multichannel sample introduction gas chromatograph comprises a sample introduction system, a sample introduction switching system and a detector, wherein the sample introduction system comprises a sample introduction selection valve controlled by a controller, a sampling gas circuit, a sample outlet gas circuit, a quantitative ring, a packing column I, a packing column II, a carrier gas inlet and a carrier gas outlet, the sample introduction switching system comprises a switching selection valve controlled by the controller, an output port of the sampling gas circuit is connected with the sample introduction selection valve, an input port of the sample outlet gas circuit is connected with the sample introduction selection valve, an input port and an output port of the quantitative ring are connected with the sample introduction selection valve, an input port and an output port of the packing column I are connected with the sample introduction selection valve, an input port of the packing column II is connected with the sample introduction switching system, an input end of the carrier gas outlet is connected with the sample introduction selection valve, an output end of the carrier gas inlet is connected with the sample introduction selection valve, the sample introduction switching system is connected with the detector.

As a further optimization scheme of the invention, the sampling selection valve is provided with a sampling state, a back flushing state and a sampling state, wherein the sampling back flushing state is as follows: the sampling gas path is connected with the input port of the quantitative ring through a sampling selection valve, the output port of the quantitative ring is connected with the sample outlet gas path through a sampling selection valve, the number of carrier gas inlets is two, one group of carrier gas inlets are connected with the filling column I through a sampling selection valve and then connected with the carrier gas outlet through the feeding selection valve, the other group of carrier gas inlets are connected with the filling column II through a feeding selection valve, and the filling column II is connected with the sampling switching system; the sample introduction state is as follows: the sampling gas circuit passes through the introduction of a sample selector valve with it connects to go out the appearance gas circuit, the carrier gas entry pass through the introduction of a sample selector valve with the input port connection of ration ring, the output port of ration ring passes through the input port connection of feeding selector valve with packed column I, the output port of packed column I passes through the input port connection of feeding selector valve with packed column II, the output port of packed column II with introduction switching system connects.

As a further optimization scheme of the invention, the sample feeding system comprises a first sample feeding system, a second sample feeding system and a third sample feeding system, and the feeding selection valve is a ten-way valve.

As a further optimization scheme of the present invention, the sample injection switching system includes a first six-way valve and a second six-way valve, and the first six-way valve and the second six-way valve have two states, a state of which is one: 1. the No. 2 port is communicated with each other; 3. the No. 4 port is communicated with the other port; 5. the No. 6 port is communicated with the other port; and a second state: 2. the No. 3 ports are communicated; 4. the No. 5 ports are communicated; 1. no. 6 mouths communicate with each other, No. 6 mouths of first six-way valve are connected with No. 5 mouths of second six-way valve, No. 4 mouths of second six-way valve are connected with the detector, first sampling system is connected with No. 1 mouth of first six-way valve, second sampling system is connected with No. 5 mouths of first six-way valve, third sampling system is connected with No. 3 mouths of second six-way valve.

As a further optimization scheme of the invention, one of the first sample feeding system, the second sample feeding system and the third sample feeding system enters a sample feeding state, and the other two sample feeding systems enter a sampling and back flushing state.

As a further optimization scheme of the invention, when the first sample introduction system is in a sample introduction state, the first six-way valve and the second six-way valve are both in a state two; when the second sample introduction system is in a sample introduction state, the first six-way valve is in a first state, and the second six-way valve is in a second state; and when the third sample feeding system is in a sample feeding state, the first six-way valve and the second six-way valve are in a first state.

As a further optimization scheme of the invention, the detector comprises an FID detector, and an air inlet and a hydrogen inlet which are communicated with the FID detector.

The invention has the beneficial effects that: the system is provided with three groups of sample introduction systems, each group of sample introduction system is mutually independent and does not interfere with each other, the switching between different sample introduction systems is realized by controlling the switching of the six-way valve through the system, the interference between components is avoided by switching the ten-way valve, and the methane and non-methane total hydrocarbon concentrations of two or more sampling points can be monitored on line at the same time.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure: 1. a first sample outlet gas path; 2. a first sampling gas path; 3. a first flow meter; 4. a first solenoid valve; 5. a first quantity of rings; 6. a first packed column II; 7. a first ten-way valve; 8. a first packed column I; 9. a first carrier gas outlet; 10. a second sample outlet gas path; 11. a second sampling gas path; 12. a second flow meter; 13. a second solenoid valve; 14. a second dosing ring; 15. a second packed column II; 16. a twentieth valve; 17. a second packed column I; 18. a second carrier gas outlet; 19. a third sample outlet gas path; 20. a third sampling gas path; 21. a third flow meter; 22. a third electromagnetic valve; 23. a third dosing ring; 24. a third packed column II; 25. a thirty-third valve; 26. a third packed column I; 27. a third carrier gas outlet; 28. a first damper; 29. a second damper; 30. a first six-way valve; 31. a third damper; 32. a detector; 33. a second six-way valve; 34. an air inlet; 35. a hydrogen inlet; 36. a first carrier gas inlet; 37. a second carrier gas inlet; 38. a fourth damper; .

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.