Sample introduction device for gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographs, in particular to a sampling device for a gas chromatograph, which comprises the gas chromatograph, one end of the gas chromatograph is provided with a sampling channel through an annular connecting plate and a fastening bolt, and the periphery of the annular connecting plate is provided with first bolt holes; second bolt holes corresponding to the first bolt holes are uniformly formed in one side, located on the annular connecting plate, of the gas chromatograph, a rubber plug is embedded in one end of the sample injection channel, an internal thread is arranged at one end of the inner side of the sample injection channel, and a flow guide strip is fixed to the other end of the inner side of the sample injection channel; the gas chromatograph is provided with a structure for blocking a sample introduction channel of the gas chromatograph, and the sample introduction channel does not have a guiding function, so that the sample introduction effect is not good.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a sample injection device for gas chromatographs. Background Art

[0002] Gas chromatograph is an instrument that uses chromatographic separation technology and detection technology to perform qualitative and quantitative analysis on complex mixtures of multiple components. Gas chromatograph uses gas as the mobile phase. When the sample enters the injector, it is carried by the carrier gas into the packed column or capillary chromatographic column. Due to the difference in the distribution or adsorption coefficients of the components in the sample between the mobile phase and the stationary phase in the chromatographic column, under the flushing of the carrier gas, the components are repeatedly distributed between the two phases so that the components are separated in the column. Then the detector connected to the column is used to detect the components in sequence according to their physical and chemical properties. It has been widely used in the fields of medicine and health, petrochemical industry, environmental monitoring, biochemistry, etc.

[0003] At present, when a gas chromatograph is used, the injection part of the gas chromatograph lacks a structure for blocking the injection channel, and the injection channel does not have a guiding function, resulting in a poor injection effect. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a sampling device for a gas chromatograph, which has a structure for blocking the sampling channel of the gas chromatograph, and the sampling channel has a guiding function, which can effectively improve the sampling effect.

[0005] The utility model solves the technical problem by adopting a technical solution that is a sample injection device for a gas chromatograph, comprising a gas chromatograph, one end of the gas chromatograph is provided with a sample injection channel through an annular connecting plate and fastening bolts, and the annular connecting plate is provided with No. 1 bolt holes around it;

[0006] A No. 2 bolt hole corresponding to the No. 1 bolt hole is evenly opened on one side of the annular connecting plate of the gas chromatograph, a rubber plug is embedded at one end of the injection channel, an internal thread is provided at one end of the inner side of the injection channel, and a guide strip is fixed at the other end of the inner side of the injection channel.

[0007] By adopting the above technical solution, when using the gas chromatograph, the personnel can take out the rubber plug inside the injection channel and then put the sample to be tested into the gas chromatograph through the injection channel;

[0008] The guide strip inside the injection channel can guide the flow of the sample;

[0009] The injection channel can be detachably connected to the gas chromatograph through the No. 1 bolt hole, the fastening bolt and the No. 2 bolt hole.

[0010] Specifically, an outer side of the rubber plug is provided with an external thread, one end of the rubber plug is connected with a fastening and adjusting nut, and the rubber plug is made of polyurethane foam rubber material.

[0011] By adopting the above technical solution, the tightening adjustment nut makes it easy for personnel to tighten or loosen the rubber plug. The rubber plug made of polyurethane foam rubber material is soft in texture and can fit tightly with the inner wall of the injection channel, thereby sealing the injection channel.

[0012] Specifically, a detector is installed on the top of the gas chromatograph via a connecting rod.

[0013] Specifically, a chromatographic column is provided at one end of the gas chromatograph below the injection channel.

[0014] Specifically, a temperature sensor is installed on the upper end of one side of the gas chromatograph through a rectangular connecting plate and screws.

[0015] By adopting the above technical solution, the temperature sensor of the gas chromatograph is mainly used to detect the temperature of different components in the gas chromatograph, including the temperature of key parts such as the detector and the chromatographic column. The temperature values ​​of these components are crucial to ensure the accuracy and stability of chromatographic analysis.

[0016] Specifically, a nameplate is installed on one side of the gas chromatograph below the temperature sensor through bolts.

[0017] Beneficial effects of the utility model:

[0018] (1) The utility model discloses a sample injection device for a gas chromatograph. When the gas chromatograph is used, the internal thread on the inner side of the sample injection channel and the external thread on the outer side of the rubber stopper can threadably connect the rubber stopper to the sample injection channel. The guide strip on the inner side of the sample injection channel can guide the flow of the sample, which is beneficial to the flow of the sample.

[0019] (2) The sample injection device for a gas chromatograph described in the utility model can be detachably connected to the gas chromatograph through the No. 1 bolt hole, the fastening bolt, and the No. 2 bolt hole, so as to facilitate maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the connection structure of the injection channel of the utility model;

[0023] Figure 3It is a schematic diagram of the internal structure of the injection channel of the utility model.

[0024] In the figure: 1. Gas chromatograph; 2. Inlet channel; 3. Rubber plug; 4. Annular connecting plate; 5. External thread; 6. No. 1 bolt hole; 7. Fastening bolt; 8. No. 2 bolt hole; 9. Internal thread; 10. Guide strip; 11. Detector; 12. Chromatographic column; 13. Nameplate; 14. Temperature sensor; 15. Fastening adjusting nut; 16. Rectangular connecting plate; 17. Connecting rod. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] In order to have a structure for blocking the injection channel 2 of the gas chromatograph, and the injection channel 2 has a guiding function, the injection effect can be effectively improved, such as Figure 1-3 As shown, a sample injection device for a gas chromatograph according to the utility model comprises a gas chromatograph 1, one end of the gas chromatograph 1 is provided with a sample injection channel 2 through an annular connecting plate 4 and a fastening bolt 7, and the annular connecting plate 4 is provided with No. 1 bolt holes 6 around the periphery;

[0027] The gas chromatograph 1 has a number 2 bolt hole 8 evenly disposed on one side of the annular connecting plate 4 corresponding to the number 1 bolt hole 6, a rubber plug 3 is embedded at one end of the injection channel 2, an internal thread 9 is disposed at one end of the inner side of the injection channel 2, and a guide strip 10 is fixed at the other end of the inner side of the injection channel 2.

[0028] When using the gas chromatograph, a person takes out the rubber stopper 3 inside the injection channel 2, and then puts the sample to be tested into the gas chromatograph 1 through the injection channel 2;

[0029] The guide strip 10 inside the injection channel 2 can guide the flow of the sample;

[0030] Through the No. 1 bolt hole 6 , the fastening bolt 7 , and the No. 2 bolt hole 8 , a person can detachably connect the injection channel 2 to the gas chromatograph 1 .

[0031] For example, Figure 1 , Figure 2 As shown, an external thread 5 is provided on the outer side of the rubber plug 3, and a tightening and adjusting nut 15 is connected to one end of the rubber plug 3. The rubber plug 3 is made of polyurethane foam rubber material.

[0032] When in use, tightening the adjusting nut 15 makes it easy for personnel to tighten or loosen the rubber plug 3 . The rubber plug 3 made of polyurethane foam rubber material is soft in texture and can fit tightly with the inner wall of the injection channel 2 , thereby blocking the injection channel 2 .

[0033] For example, Figure 1 As shown, a detector 11 is installed on the top of the gas chromatograph 1 via a connecting rod 17 .

[0034] When in use, the detector 11 on the gas chromatograph 1 is one of the key components of the gas chromatograph 1 and is responsible for converting the components separated by the chromatographic column 12 into measurable electrical signals.

[0035] For example, Figure 1 As shown, a chromatographic column 12 is provided at one end of the gas chromatograph 1 below the injection channel 2 .

[0036] When in use, the chromatographic column 12 is a core component of the gas chromatograph 1 , which is filled with a stationary phase, and the sample is separated in the chromatographic column 12 through interaction with the stationary phase.

[0037] For example, Figure 1 As shown, a temperature sensor 14 is installed on the upper end of one side of the gas chromatograph 1 through a rectangular connecting plate 16 and screws.

[0038] When in use, the temperature sensor 14 of the gas chromatograph 1 is mainly used to detect the temperature of different components in the gas chromatograph 1, including the temperature of key parts such as the detector 11 and the chromatographic column 12. The temperature values ​​of these components are crucial to ensure the accuracy and stability of chromatographic analysis.

[0039] For example, Figure 1 As shown, a nameplate 13 is installed on one side of the gas chromatograph 1 below the temperature sensor 14 by means of bolts.

[0040] When in use, the nameplate 13 is convenient for displaying information such as the model, specification and production date of the novel gas chromatograph 1 .

[0041] When the utility model is used, when the gas chromatograph is used, the internal thread 9 on the inner side of the injection channel 2 and the external thread 5 on the outer side of the rubber plug 3 can threadably connect the rubber plug 3 with the injection channel 2. When the rubber plug 3 inside the injection channel 2 is taken out, the sample to be tested can be put into the gas chromatograph 1 through the injection channel 2.

[0042] The guide strip 10 inside the injection channel 2 can guide the flow of the sample, which is beneficial to the flow of the sample;

[0043] Through the No. 1 bolt hole 6, the fastening bolt 7 and the No. 2 bolt hole 8, the injection channel 2 can be detachably connected to the gas chromatograph 1, which is convenient for maintenance and replacement.

[0044] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A sample injection device for a gas chromatograph, characterized in that: It comprises a gas chromatograph (1), one end of which is provided with an injection channel (2) via an annular connecting plate (4) and fastening bolts (7), and the annular connecting plate (4) is provided with No. 1 bolt holes (6) around the periphery; The gas chromatograph (1) is provided with a number 2 bolt hole (8) evenly disposed on one side of the annular connecting plate (4) and corresponding to the number 1 bolt hole (6); a rubber plug (3) is embedded at one end of the injection channel (2); an internal thread (9) is disposed at one end of the inner side of the injection channel (2); and a guide strip (10) is fixed at the other end of the inner side of the injection channel (2).

2. A sample injection device for a gas chromatograph according to claim 1, characterized in that: The outer side of the rubber plug (3) is provided with an external thread (5), one end of the rubber plug (3) is connected to a tightening and adjusting nut (15), and the rubber plug (3) is made of polyurethane foam rubber material.

3. A sample injection device for a gas chromatograph according to claim 1, characterized in that: A detector (11) is installed on the top of the gas chromatograph (1) via a connecting rod (17).

4. A sample injection device for a gas chromatograph according to claim 1, characterized in that: One end of the gas chromatograph (1) is located below the injection channel (2) and is provided with a chromatographic column (12).

5. A sample injection device for a gas chromatograph according to claim 1, characterized in that: A temperature sensor (14) is installed on the upper end of one side of the gas chromatograph (1) via a rectangular connecting plate (16) and screws.

6. A sample injection device for a gas chromatograph according to claim 1, characterized in that: A nameplate (13) is installed on one side of the gas chromatograph (1) below the temperature sensor (14) via bolts.

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