CN216847644U - Full-automatic multi-position gas sample injector with sample dilution function - Google Patents
Full-automatic multi-position gas sample injector with sample dilution function Download PDFInfo
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- CN216847644U CN216847644U CN202123325778.4U CN202123325778U CN216847644U CN 216847644 U CN216847644 U CN 216847644U CN 202123325778 U CN202123325778 U CN 202123325778U CN 216847644 U CN216847644 U CN 216847644U
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Abstract
The utility model relates to the technical field of gas sample injectors, in particular to a full-automatic multi-position gas sample injector with sample dilution, which can dilute samples and has more accurate detection result, and comprises a sample injector main body, wherein a plurality of electromagnetic valves are arranged in the middle of the right part of the sample injector main body, a first MCF and a second MCF are arranged at the front part of the right part of the sample injector main body, a sampling pump is arranged at the front part of the left part of the sample injector main body, a plurality of multi-position switching valves are arranged at the rear part of the sample injector main body, a plurality of sample injection ports are arranged at the rear end of the sample injector main body, a syringe bracket is arranged at the rear end of the sample injector main body, a sample injection valve assembly is arranged in the middle of the left part of the sample injector main body, the sampling pump adopts a negative pressure sampling mode, the sample injection ports can be connected with an air bag or a syringe, the sample injection valve assembly is a six-way valve or a ten-way valve, a heating module is attached to the valve assembly, and the sample injector main body is provided with an automatic cleaning device, the solenoid valves are divided into a first solenoid valve, a second solenoid valve and a third solenoid valve.
Description
Technical Field
The utility model relates to a gaseous sample injector technical field specifically is a take gaseous sample injector of full-automatic many of sample dilution.
Background
As is well known, a fully automatic gas sample injector is a device for quantitatively analyzing a gas sample and automatically injecting the quantitative gas sample into a chromatographic column through a set flow path, and mainly comprises a six-way valve (or a ten-way valve), a quantitative ring, an electromagnetic valve, an MFC, and a connecting gas line. The method is mainly applied to environmental air detection, petrochemical gas analysis and the like. Full-automatic gas on the market advances kind diversified at present, and some environment monitoring station need the sample function of diluting, and the full-automatic gas sample injector on the market all does not possess the sample function of diluting, and the ring is monitored station and various detection units and is all through manual operation, carries out the sample with the cylinder and dilutes, and so both extravagant a large amount of manual works can cause the testing result to be inaccurate because of manual operation.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a can dilute the sample and the more accurate take full-automatic many gaseous sample injectors of sample dilution of testing result.
(II) technical scheme
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a take full-automatic many gaseous sample injectors of sample dilution, including the sample injector main part, the middle part of sample injector main part right part is provided with the several solenoid valve, the front portion of sample injector main part right part is provided with first MCF and second MCF, the front portion of sample injector main part left part is provided with the sample pump, the rear portion of sample injector main part is provided with several multiple-position switch valve, sample injector main part rear end is provided with several sample introduction port, the rear end of sample injector main part is provided with the cylinder support, the middle part of sample injector main part left part is provided with the injection valve subassembly.
Furthermore, the sampling mode of the sampling pump is negative pressure sampling.
Further, the sample injection port can be connected with an air bag or a syringe.
Further, the sample injection valve assembly is a six-way valve or a ten-way valve.
Further, the sampling valve component is provided with a heating module.
Further, the injector main body is equipped with an automatic cleaning device.
Further, the solenoid valve is divided into a first solenoid valve, a second solenoid valve and a third solenoid valve.
(III) advantageous effects
Compared with the prior art, the utility model provides a take gaseous injector of full-automatic many bits of sample dilution possesses following beneficial effect:
this take diluted full-automatic many gaseous sample injectors of sample, through the setting of first MFC, second MFC, the sampling pump, many diverter valve and injection valve subassembly, the effectual artifical cylinder that utilizes of traditional having replaced carries out the sample dilution, through the accurate flow control of first MFC and second MFC, can guarantee the dilution precision of sample, sample gas can dilute according to arbitrary proportion, thereby guarantee the stability and the repeatability of experimental data, can also liberate the manual work, this kind of gaseous sample injector just in time accords with the demand that closes ring prison station and detection unit, thereby the manual work can be practiced thrift, and make the testing result more accurate.
Drawings
Fig. 1 is a schematic top view of the present invention;
FIG. 2 is a gas circuit diagram and a circuit diagram of the present invention;
fig. 3 is a test data chart of the present invention.
In the figure: 1. a sample injector main body; 2. an electromagnetic valve; 3. a first MFC; 4. a second MFC; 5. a sampling pump; 6. a multi-way switching valve; 7. a sample injection port; 8. a syringe bracket; 9. a sample injection valve assembly; 21. a first solenoid valve; 22. a second solenoid valve; 23. and a third solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, a full-automatic multi-position gas sample injector with sample dilution of the present invention comprises a sample injector main body 1, the sample injector main body 1 is equipped with an automatic cleaning device to perform functions of cleaning a sample inlet and cleaning an air bag, the middle part of the right part of the sample injector main body 1 is provided with a plurality of electromagnetic valves 2 for controlling the on-off of air flow, the electromagnetic valves are divided into a first electromagnetic valve 21, a second electromagnetic valve 22 and a third electromagnetic valve 23, the front part of the right part of the sample injector main body 1 is provided with a first MFC3 and a second MFC4, the dosage of the first MFC3 controls the nitrogen flow, the second MFC4 controls the total flow of nitrogen and sample gas, thereby achieving the purpose of sample dilution, the front part of the left part of the sample injector main body 1 is provided with a sampling pump 5, the sampling mode of the sampling pump 5 is negative pressure sampling, sampling and collecting the gas, the rear part of the sample injector main body 1 is provided with a plurality of multi-position switching valves 6, the multi-position switching valve 6 controls gas connected with the sample injection ports 7 to enter, the rear end of the sample injector main body 1 is provided with a plurality of sample injection ports 7, the sample injection ports 7 can be connected with an air bag or a needle cylinder, the rear end of the sample injector main body 1 is provided with a needle cylinder support 8 for mounting the needle cylinder, the middle of the left part of the sample injector main body 1 is provided with a sample injection valve assembly 9, the sample injection valve assembly 9 is a six-way valve or a ten-way valve, and the sample injection valve assembly 9 is additionally provided with a heating module.
The full-automatic gas sample injector with the sample diluting function is installed in a loop monitoring station and different environment detection units, data is good, performance is stable, and the requirement for sample diluting is perfectly met.
The methane gas is used for testing, and the specific data are shown in the following figure 3.
In summary, the fully automatic multi-position gas injector with sample dilution is used, in which the first MFC3 is used to control the flow of nitrogen, and the second MFC4 is used to control the total flow of nitrogen and sample gas, so as to achieve the purpose of sample dilution. When the gas is diluted and detected, one sample injection port 7 is connected with high-purity nitrogen with the purity of 99.99 percent, the other sample injection ports 7 are connected with standard gas with known concentration, then the flow rates of the two paths are set proportionally, the second electromagnetic valve 22 and the third electromagnetic valve 23 are opened in the sampling process, the sampling pump 5 is started, and the first MFC3 and the second MFC4 are controlled according to the set flow rates, so that the obtained sample is the sample after dilution. During the conventional sampling, one sample injection port 7 is connected with high-purity nitrogen with the purity of more than 99.99 percent, the other sample injection ports 7 are respectively connected with a sample air bag or a syringe which is actually collected, in the sampling process, the first electromagnetic valve 21 and the third electromagnetic valve 23 are opened, the sampling pump 5 is started, and the first MFC3 and the second MFC4 are respectively controlled according to the set flow, so that the sample entering the chromatogram is the diluted sample.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a take gaseous injector of full-automatic many of sample dilution, includes injector main part (1), its characterized in that: the middle part of injector main part (1) right part is provided with several solenoid valve (2), the front portion of injector main part (1) right part is provided with first MCF (3) and second MCF (4), the front portion of injector main part (1) left part is provided with sampling pump (5), the rear portion of injector main part (1) is provided with several multiple-position switch valve (6), injector main part (1) rear end is provided with several sample introduction port (7), the rear end of injector main part (1) is provided with cylinder support (8), the middle part of injector main part (1) left part is provided with injection valve subassembly (9).
2. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the sampling mode of the sampling pump (5) is negative pressure sampling.
3. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the sample injection port (7) can be connected with an air bag or a needle cylinder.
4. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the sample injection valve assembly (9) is a six-way valve or a ten-way valve.
5. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the sampling valve assembly (9) is additionally provided with a heating module.
6. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the injector body (1) is equipped with an automatic cleaning device.
7. The fully automatic multi-position gas injector with sample dilution according to claim 1, characterized in that: the electromagnetic valve is divided into a first electromagnetic valve (21), a second electromagnetic valve (22) and a third electromagnetic valve (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123325778.4U CN216847644U (en) | 2021-12-27 | 2021-12-27 | Full-automatic multi-position gas sample injector with sample dilution function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123325778.4U CN216847644U (en) | 2021-12-27 | 2021-12-27 | Full-automatic multi-position gas sample injector with sample dilution function |
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| Publication Number | Publication Date |
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| CN216847644U true CN216847644U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123325778.4U Active CN216847644U (en) | 2021-12-27 | 2021-12-27 | Full-automatic multi-position gas sample injector with sample dilution function |
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| CN (1) | CN216847644U (en) |
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2021
- 2021-12-27 CN CN202123325778.4U patent/CN216847644U/en active Active
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