Gas chromatograph for environmental soil detection

Abstract

The utility model discloses a gas chromatograph for environmental soil detection, which belongs to the field of gas chromatographs and comprises a gas chromatograph main body, a connecting pipe is fixedly mounted at one end of the gas chromatograph main body, a gas inlet pipeline is inserted into the connecting pipe, four fixing structures are symmetrically mounted at one end of the gas chromatograph main body and on the periphery of the connecting pipe, and a gas outlet pipeline is inserted into the gas inlet pipeline. The fixing structure is composed of a mounting block, an anti-falling column, an L-shaped connecting rod, an arc-shaped plate and an arc-shaped protrusion, and by arranging the fixing structure and an annular spring, the mounting steps of the air inlet pipeline and the connecting pipe can be simplified, so that the mounting steps of the air inlet pipeline and the connecting pipe are simple and convenient, and then the mounting efficiency of the air inlet pipeline and the connecting pipe can be improved; when the air inlet pipeline and the connecting pipe are installed, the inserting pipe on the air inlet pipeline can be directly inserted into the connecting pipe, at the moment, under the elastic acting force of the annular spring, the arc-shaped protrusion on the fixing structure can be embedded into the annular groove, and therefore assembling connection of the air inlet pipeline and the connecting pipe is completed in one step.

Description

Technical Field

[0001] The utility model relates to the field of gas chromatographs, in particular to a gas chromatograph for environmental soil detection. Background Art

[0002] Gas chromatograph is an instrument that uses chromatographic separation technology and detection technology to conduct qualitative and quantitative analysis of complex mixtures of multiple components. It can usually be used to analyze organic matter in soil that is thermally stable and has a boiling point not exceeding 500 degrees Celsius, such as volatile organic matter, organochlorine, organophosphorus, polycyclic aromatic hydrocarbons, phthalate esters, etc. In actual use, gas chromatographs need to be introduced into the gas. The gas used in existing gas chromatographs is nitrogen, and a nitrogen tank is used to connect the gas inlet head of the gas chromatograph using a conduit. In the existing patent application with application number CN202221364842.1, a gas chromatograph inlet head for soil gas detection is proposed. Although it is inserted into the limit groove of the limit plate through the connecting plate, when the nitrogen tank and the air inlet pipe are connected, the electromagnet can be energized to adsorb the iron block, so that the sleeve presses the first rubber ring and the second rubber ring, so that the connection can be quickly made, which makes the disassembly and assembly convenient and quick to a certain extent, and the compression degree is high. However, the installation process of the air inlet pipe and the connecting head still needs to be simplified. When installing the air inlet pipe and the connecting head, the first step is to put the sleeve on the outer wall of the connecting head, and make the magnet block at the end of the connecting plate stuck in the limit groove, and the second step is to pass current through the electromagnet. Only then can the installation of the air inlet pipe and the connecting head be completed, which makes the installation efficiency of the air inlet pipe and the connecting head low, so it needs to be improved. Utility Model Content

[0003] The main purpose of the utility model is to provide a gas chromatograph for environmental soil detection, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A gas chromatograph for environmental soil detection comprises a chromatograph body, one end of the chromatograph body is fixedly mounted with a connecting pipe, the connecting pipe is plugged with an air inlet pipe, one end of the chromatograph body and four fixed structures are symmetrically mounted around the connecting pipe, the fixed structure consists of a mounting block, an anti-slip column, an L-shaped connecting rod, an arc plate and an arc protrusion, the anti-slip column is movably mounted in the mounting block, the arc plate is located on the outside of the mounting block, the L-shaped connecting rod is fixedly connected to the anti-slip column and the arc plate respectively, the arc protrusion is fixedly mounted on the inner wall of the arc plate, and an annular spring is sleeved on the four arc plates on the four fixed structures.

[0006] Preferably, the air intake pipe is composed of a pipe body, a connector and a plug-in pipe, the connector is fixedly installed on the inner end of the pipe body, and the plug-in pipe is fixedly installed on the inner end of the connector.

[0007] Preferably, the plug-in tube can be inserted into the connecting tube.

[0008] Preferably, an annular groove is provided on the outer wall of the connector.

[0009] Preferably, the mounting block on the fixed structure is fixedly mounted on one end of the chromatograph body, an anti-slip groove is provided in the mounting block, a connecting groove is provided at one end of the mounting block, the anti-slip groove and the connecting groove are connected to each other, the anti-slip column is movably mounted in the anti-slip groove, the L-shaped connecting rod passes through the connecting groove, an arc-shaped groove is provided on the outer wall of the arc plate, and the arc-shaped protrusion can be embedded in the annular groove.

[0010] Preferably, the annular spring is installed in an arc-shaped groove.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] By providing a fixed structure and an annular spring, the installation steps of the intake duct and the connecting pipe can be simplified, thereby making the installation steps of the intake duct and the connecting pipe relatively simple, thereby improving the installation efficiency of the intake duct and the connecting pipe. When installing the intake duct and the connecting pipe, the plug-in tube on the intake duct can be directly plugged into the connecting pipe. At this time, under the elastic force of the annular spring, the arc-shaped protrusion on the fixed structure will be embedded in the annular groove, thereby completing the assembly connection of the intake duct and the connecting pipe in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 For the utility model Figure 1 A magnified view of point A;

[0015] Figure 3 This is a disassembled diagram of the connecting pipe and the air intake pipe of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the fixing structure of the utility model.

[0017] In the figure: 1. Chromatograph body; 2. Connecting pipe; 3. Inlet pipe; 4. Fixing structure; 5. Annular spring; 6. Pipe body; 7. Connecting head; 8. Plug-in pipe; 9. Annular groove; 10. Mounting block; 11. Anti-slip groove; 12. Connecting groove; 13. Anti-slip column; 14. L-shaped connecting rod; 15. Arc plate; 16. Arc protrusion; 17. Arc groove. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a gas chromatograph for environmental soil detection includes a chromatograph body 1, a connecting pipe 2 is fixedly installed at one end of the chromatograph body 1, an air intake pipe 3 is plugged into the connecting pipe 2, the air intake pipe 3 is composed of a pipe body 6, a connector 7 and a plug-in pipe 8, the connecting head 7 is fixedly installed at the inner end of the pipe body 6, the plug-in pipe 8 is fixedly installed at the inner end of the connecting head 7, the plug-in pipe 8 can be plugged into the connecting pipe 2, and an annular groove 9 is opened on the outer wall of the connecting head 7.

[0020] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, four fixed structures 4 are symmetrically installed at one end of the chromatograph body 1 and around the connecting pipe 2, and the fixed structure 4 is composed of a mounting block 10, an anti-slip column 13, an L-shaped connecting rod 14, an arc plate 15 and an arc-shaped protrusion 16. The anti-slip column 13 is movably installed in the mounting block 10, and the arc plate 15 is located on the outside of the mounting block 10. The L-shaped connecting rod 14 is fixedly connected to the anti-slip column 13 and the arc plate 15 respectively, and the arc-shaped protrusion 16 is fixedly installed on the inner wall of the arc plate 15. An annular spring 5 is sleeved on the four arc plates 15 on the four fixed structures 4. The mounting block 10 on the fixed structure 4 is fixedly installed at one end of the chromatograph body 1, and an anti-slip groove 11 is provided in the mounting block 10. A connecting groove 12 is provided at one end of the mounting block 10, and the anti-slip groove 11 and the connecting groove 12 are communicated with each other. It is movably installed in the anti-slip groove 11, the L-shaped connecting rod 14 passes through the connecting groove 12, an arc groove 17 is opened on the outer wall of the arc plate 15, the arc protrusion 16 can be embedded in the annular groove 9, and the annular spring 5 is installed in the arc groove 17. By setting the fixing structure 4 and the annular spring 5, the installation steps of the intake pipe 3 and the connecting pipe 2 can be simplified, so that the installation steps of the intake pipe 3 and the connecting pipe 2 are relatively simple, and then the installation efficiency of the intake pipe 3 and the connecting pipe 2 can be improved. When installing the intake pipe 3 and the connecting pipe 2, the plug-in tube 8 on the intake pipe 3 can be directly plugged into the connecting pipe 2. At this time, under the elastic force of the annular spring 5, the arc protrusion 16 on the fixing structure 4 will be embedded in the annular groove 9, thereby completing the assembly connection of the intake pipe 3 and the connecting pipe 2 in one step.

[0021] It should be noted that the utility model is a gas chromatograph for environmental soil detection. When in use, the nitrogen tank needs to be connected to the chromatograph body 1 through the connecting pipe 2 and the air inlet pipe 3. At this time, it is only necessary to assemble the air inlet pipe 3 connected to the nitrogen tank and the connecting pipe 2 installed on the chromatograph body 1. In this process, the plug-in pipe 8 on the air inlet pipe 3 can be directly plugged into the connecting pipe 2. In the process of inserting the plug-in pipe 8 into the connecting pipe 2, the connector 7 on the air inlet pipe 3 will first push the arc-shaped plates 15 and the arc-shaped protrusions 16 on the four fixed structures 4 outwards. When the arc-shaped plate 15 moves outwards, it will drive the anti-detachment column 13 to move in the anti-detachment groove 11 through the L-shaped connecting rod 14. At the same time, the arc-shaped plate 15 moving outwards will squeeze the annular spring 5, thereby The annular spring 5 will be stretched and deformed. When the plug-in tube 8 is fully inserted into the connecting tube 2, under the elastic force of the annular spring 5, the arc plate 15 and the arc protrusion 16 on the fixed structure 4 will move inward, and finally the arc protrusion 16 will be embedded in the annular groove 9 provided on the outer wall of the connector 7. At this time, the air inlet pipe 3 and the connecting tube 2 are installed and fixed together. When testing the soil, a soil sample is prepared first, and then the prepared sample solution is placed in the injection port of the gas chromatograph. Then the sample solution is introduced into the chromatographic column, and the sample is separated into different components by heating, evaporation, condensation, etc., and then enters the detector for detection. Finally, the peak area or peak height and other data are measured and analyzed by an electronic integrator or other quantitative methods to obtain the content of each component in the sample.

[0022] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. The protection scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas chromatograph for environmental soil detection, comprising a chromatograph body (1), one end of the chromatograph body (1) being fixedly mounted with a connecting pipe (2), the connecting pipe (2) being plugged with an air inlet pipe (3), characterized in that: Four fixed structures (4) are symmetrically installed at one end of the chromatograph body (1) and around the connecting pipe (2). The fixed structure (4) consists of a mounting block (10), an anti-slip column (13), an L-shaped connecting rod (14), an arc plate (15) and an arc-shaped protrusion (16). The anti-slip column (13) is movably installed in the mounting block (10), the arc plate (15) is located on the outside of the mounting block (10), the L-shaped connecting rod (14) is fixedly connected to the anti-slip column (13) and the arc plate (15), respectively, and the arc-shaped protrusion (16) is fixedly installed on the inner wall of the arc plate (15). An annular spring (5) is sleeved on the four arc plates (15) on the four fixed structures (4).

2. A gas chromatograph for environmental soil detection according to claim 1, characterized in that: The air intake pipe (3) is composed of a pipe body (6), a connector (7) and a plug-in pipe (8); the connector (7) is fixedly mounted on the inner end of the pipe body (6), and the plug-in pipe (8) is fixedly mounted on the inner end of the connector (7).

3. A gas chromatograph for environmental soil detection according to claim 2, characterized in that: The plug-in tube (8) can be inserted into the connecting tube (2).

4. A gas chromatograph for environmental soil detection according to claim 3, characterized in that: An annular groove (9) is provided on the outer wall of the connector (7).

5. A gas chromatograph for environmental soil detection according to claim 4, characterized in that: The mounting block (10) on the fixed structure (4) is fixedly mounted on one end of the chromatograph body (1); an anti-slip groove (11) is provided in the mounting block (10); a connecting groove (12) is provided at one end of the mounting block (10); the anti-slip groove (11) and the connecting groove (12) are communicated with each other; the anti-slip column (13) is movably mounted in the anti-slip groove (11); the L-shaped connecting rod (14) passes through the connecting groove (12); an arc-shaped groove (17) is provided on the outer wall of the arc-shaped plate (15); and the arc-shaped protrusion (16) can be embedded in the annular groove (9).

6. A gas chromatograph for environmental soil detection according to claim 5, characterized in that: The annular spring (5) is installed in the arc-shaped groove (17).

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