Auxiliary pollution prevention sealing structure for gas chromatograph sample inlet

Abstract

The utility model discloses a kind of auxiliary sealing structures for preventing pollution of gas chromatograph sample inlet, it includes multiple sample inlets being opened in the top of gas chromatograph, the top of multiple sample inlets is equipped with sealing element, the surface of multiple sealing elements is provided with mounting sleeve, the bottom of mounting sleeve is located in the top of gas chromatograph, the inner chamber of mounting sleeve is attached with protective sleeve, the inner chamber of protective sleeve is tightly attached with the outside of sealing element.The utility model gas chromatograph is analyzed, operating personnel introduce sample into sample inlet by sample needle to complete sample operation, then sealing element is inserted into the inner chamber of mounting sleeve, mounting sleeve is attached in the position of the top of sample inlet, after the upper clamping piece and lower clamping piece are clamped, locking is realized by rotating fastening bolt and pressing the top of upper clamping piece, lower clamping piece and upper clamping piece are fixed by rotating fastening bolt, finally sealing element is installed in the top position of sample inlet more stable.

Description

Technical Field

[0001] This utility model belongs to the field of gas chromatography technology, and in particular relates to an anti-contamination auxiliary sealing structure for the gas chromatograph inlet. Background Technology

[0002] Gas chromatographs are instruments that separate and analyze substances based on the difference in partition coefficients between the gas phase and the stationary phase. They consist of a gas path system, an injection system, a chromatographic column, a detector, and a data processing system. After the carrier gas carries the sample into the chromatographic column for separation, the detector converts the component signals into electrical signals. They are widely used for the qualitative and quantitative analysis of organic compounds and other substances.

[0003] The gas chromatograph injection port is the core component for sample introduction, and its sealing performance directly affects the accuracy of detection. During long-term use, sample residues and external impurities can easily enter the injection port, affecting the sealing effect and analytical accuracy. Therefore, it is necessary to design a contamination-proof auxiliary sealing structure for the gas chromatograph injection port. The sealing sleeve can be disassembled and opened during sample injection, and the seal can be installed immediately after the injection is completed. This can prevent the intrusion of external impurities and the volatilization of sample residues, continuously ensuring the cleanliness and sealing accuracy of the injection port, and improving the reliability of analytical results. Utility Model Content

[0004] The purpose of this invention is to provide a contamination-proof auxiliary sealing structure for the injection port of a gas chromatograph. This structure features a removable sealing sleeve that can be opened during injection and immediately resealed after injection. It can prevent the intrusion of external impurities and the volatilization of sample residues, continuously ensuring the cleanliness and sealing accuracy of the injection port and improving the reliability of analytical results, thereby solving the aforementioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A gas chromatograph inlet anti-contamination auxiliary sealing structure includes multiple inlets opened on the top of the gas chromatograph, each inlet having a sealing element installed on its top, and each sealing element having an installation sleeve on its surface. The bottom of the installation sleeve is located on the top of the gas chromatograph, and a protective sleeve is fitted inside the inner cavity of the installation sleeve. The inner cavity of the protective sleeve is tightly fitted to the outer side of the sealing element. A threaded sleeve is installed on the surface of the installation sleeve, and a lower clamping element is provided on the top of the installation sleeve. An upper clamping element is provided at the bottom of the surface of the threaded sleeve, and the lower clamping element engages with the upper clamping element.

[0006] Preferably, a connecting sleeve is fixedly connected to the surface of the mounting sleeve, and the bottom of the plurality of connecting sleeves is attached to the top of the gas chromatograph.

[0007] Preferably, a spring washer is provided on the top of the mounting sleeve, and the top of the spring washer fits tightly against the bottom of the lower clip.

[0008] Preferably, the surface of the threaded sleeve is provided with a retaining ring, and the bottom of the retaining ring is fixedly connected to the upper clamp.

[0009] Preferably, the surface of the threaded sleeve is threaded with a fastening bolt, and the bottom of the fastening bolt is in close contact with the top of the retaining ring.

[0010] Preferably, the surfaces of the mounting sleeve and the connecting sleeve are fixedly connected to a plurality of Z-fixing seats, and the bottoms of the plurality of Z-fixing seats are fixedly connected to the top of the gas chromatograph.

[0011] The beneficial effects of this utility model are: 1. In the gas chromatograph analysis of this utility model, the operator uses the injection needle to introduce the sample into the injection port to complete the injection operation. Then, the sealing element is inserted into the inner cavity of the mounting sleeve, and the mounting sleeve fits against the top of the injection port. After the upper and lower clamps are engaged, the upper clamp is locked by rotating the fastening bolt. The lower and upper clamps are fixed by rotating the fastening bolt. Finally, the sealing element is installed at the top of the injection port and is relatively stable. This allows the sealing sleeve to be disassembled and opened during injection, and the seal is installed immediately after the injection is completed. This can prevent the intrusion of external impurities and the volatilization of sample residues, continuously ensuring the cleanliness and sealing accuracy of the injection port, and improving the reliability of the analysis results. 2. This utility model uses a spring washer. The spring washer can compensate for the displacement at the connection between the mounting sleeve and the lower clamp through its own elastic deformation. The spring washer can distribute pressure, avoid wear on the mounting sleeve and the lower clamp, and improve the connection reliability and service life. 3. The Z-fixed seat in this utility model limits the mounting sleeve and connecting sleeve, ensuring that the mounting sleeve and connecting sleeve will not shift their positions when installed on the top of the gas chromatograph, thus improving the tightness of the seal at the injection port. Attached Figure Description

[0012] The advantages of the present invention, as described above and / or in the following detailed description in conjunction with the accompanying drawings, will become clearer and more readily understood. These drawings are merely illustrative and do not limit the scope of the present invention. Figure 1 This is a front view schematic diagram of one embodiment of the present utility model; Figure 2 This is a three-dimensional schematic diagram of a gas chromatograph and an injection port according to an embodiment of the present invention; Figure 3 This is a three-dimensional disassembled view of the sealing element and mounting sleeve according to an embodiment of the present utility model; Figure 4 This is a schematic diagram showing the disassembled protective sleeve and threaded sleeve according to one embodiment of the present invention.

[0013] The attached diagram lists the components represented by each number as follows: 1. Gas chromatograph, 2. Inlet, 3. Seal, 4. Mounting sleeve, 5. Connecting sleeve, 6. Protective sleeve, 7. Threaded sleeve, 8. Spring washer, 9. Lower clamp, 10. Fixing ring, 11. Upper clamp, 12. Fastening bolt, 13. Z-fixed seat. Detailed Implementation

[0014] In the following description, embodiments of the anti-contamination auxiliary sealing structure for the gas chromatograph inlet of this invention will be described with reference to the accompanying drawings.

[0015] Figure 1-4 This invention illustrates an embodiment of an anti-contamination auxiliary sealing structure for a gas chromatograph inlet, comprising multiple inlets 2 located on the top of a gas chromatograph 1. Each inlet 2 has a sealing element 3 mounted on its top. Each sealing element 3 has a mounting sleeve 4 on its surface. The bottom of the mounting sleeve 4 is located on the top of the gas chromatograph 1. A connecting sleeve 5 is fixedly connected to the surface of the mounting sleeve 4. The bottoms of the connecting sleeves 5 are fitted against the top of the gas chromatograph 1. A protective sleeve 6 is fitted into the inner cavity of the mounting sleeve 4, and the inner cavity of the protective sleeve 6 is tightly fitted against the outer side of the sealing element 3. A threaded sleeve 7 is mounted on the surface of the mounting sleeve 4. A lower retainer 9 is located on the top of the mounting sleeve 4. A spring washer 8 is located on the top of the mounting sleeve 4, and the top of the spring washer 8 is tightly fitted against the bottom of the lower retainer 9. Through the elastic deformation of the spring washer 8, the connection between the mounting sleeve 4 and the lower retainer 9 can be compensated. The displacement of the spring washer 8 can disperse the pressure, avoid wear of the mounting sleeve 4 and the lower clamp 9, and improve the connection reliability and service life. The surface of the threaded sleeve 7 is provided with a fixing ring 10. The bottom of the fixing ring 10 is fixedly connected to the upper clamp 11. The lower clamp 9 is engaged with the upper clamp 11. The surface of the threaded sleeve 7 is threadedly connected with a fastening bolt 12. The bottom of the fastening bolt 12 is tightly fitted with the top of the fixing ring 10. The surfaces of the mounting sleeve 4 and the connecting sleeve 5 are fixedly connected with multiple Z-fixed seats 13. The bottom of the multiple Z-fixed seats 13 is fixedly connected to the top of the gas chromatograph 1. Through the setting of the Z-fixed seats 13, the Z-fixed seats 13 play a limiting role for the mounting sleeve 4 and the connecting sleeve 5, ensuring that the mounting sleeve 4 and the connecting sleeve 5 will not shift their positions when installed on the top of the gas chromatograph 1, and improving the sealing tightness of the sealing element 3 at the injection port 2.

[0016] Working principle: When using this utility model, firstly, the protective sleeve 6 is pre-fitted into the inner cavity of the mounting sleeve 4, ensuring that the inner wall of the protective sleeve 6 fits snugly against the outer side of the seal 3. Then, the seal 3 is precisely inserted into the protective sleeve 6 inside the inner cavity of the mounting sleeve 4, so that the connecting sleeve 5 at the bottom of the mounting sleeve 4 is tightly fitted against the outer periphery of the injection port 2 at the top of the gas chromatograph 1. Subsequently, the spring washer 8 is placed stably on the top of the mounting sleeve 4, using the elastic properties of the spring washer 8 to reserve buffer space. Then, the lower clamp 9 and the upper clamp 11 are sequentially engaged in corresponding positions. By rotating the fastening bolt 12, the threaded sleeve 7 is precisely engaged with the threads on the surface of the mounting sleeve 4. With the help of the lower clamp 9 and the upper clamp... The locking and limiting function of component 11 ensures the stable fixation of the seal 3 above the injection port 2. At the same time, the fixing ring 10 provides auxiliary limiting for the position of the locking component. During injection, the fastening bolt 12 is rotated in the opposite direction to loosen the threaded connection. The upper locking component 11, the lower locking component 9, and the seal 3 are disassembled in sequence. The operator uses the injection needle to accurately introduce the sample into the injection port 2 to complete the injection operation. During this process, the Z fixing seat 13 forms a bidirectional limiting for the mounting sleeve 4 and the connecting sleeve 5 through the fixed connection with the top of the gas chromatograph 1, preventing positional deviation during assembly and ensuring accurate alignment and sealing between the seal 3 and the injection port 2.

[0017] In summary, this anti-contamination auxiliary sealing structure for the gas chromatograph inlet allows the operator to introduce the sample into the inlet 2 using a syringe needle during gas chromatograph 1 analysis. The sealing element 3 is then inserted into the inner cavity of the mounting sleeve 4, which fits snugly against the top of the inlet 2. After engaging the upper clamp 11 and lower clamp 9, the upper clamp 11 is secured by rotating the fastening bolt 12. Rotating the fastening bolt 12 further secures the lower clamp 9 and upper clamp 11. Finally, the sealing element 3 is stably installed at the top of the inlet 2, allowing for easy disassembly and opening during sample injection, and immediate resealing after injection. This effectively prevents external impurities from entering and sample residues from evaporating, continuously ensuring the cleanliness and sealing accuracy of the inlet, and improving the reliability of analytical results.

Claims

1. A contamination-preventing auxiliary sealing structure for the sample inlet of a gas chromatograph, characterized in that, The system includes multiple injection ports (2) located on the top of the gas chromatograph (1). Each injection port (2) is equipped with a seal (3) on its top. Each seal (3) has a mounting sleeve (4) on its surface. The bottom of the mounting sleeve (4) is located on the top of the gas chromatograph (1). A protective sleeve (6) is fitted inside the mounting sleeve (4). The inner cavity of the protective sleeve (6) is tightly fitted to the outer side of the seal (3). A threaded sleeve (7) is installed on the surface of the mounting sleeve (4). A lower clamp (9) is provided on the top of the mounting sleeve (4). An upper clamp (11) is provided at the bottom of the surface of the threaded sleeve (7). The lower clamp (9) engages with the upper clamp (11).

2. The anti-contamination auxiliary sealing structure for the gas chromatograph inlet according to claim 1, characterized in that, The mounting sleeve (4) is fixedly connected to the surface of the connecting sleeve (5), and the bottom of the multiple connecting sleeves (5) is attached to the top of the gas chromatograph (1).

3. The anti-contamination auxiliary sealing structure for the gas chromatograph inlet according to claim 2, characterized in that, The top of the mounting sleeve (4) is provided with a spring washer (8), and the top of the spring washer (8) is in close contact with the bottom of the lower clip (9).

4. The anti-contamination auxiliary sealing structure for the gas chromatograph inlet according to claim 3, characterized in that, The surface of the threaded sleeve (7) is provided with a fixing ring (10), and the bottom of the fixing ring (10) is fixedly connected to the upper clamp (11).

5. The anti-contamination auxiliary sealing structure for the gas chromatograph inlet according to claim 4, characterized in that, The threaded sleeve (7) is threaded with a fastening bolt (12), the bottom of which is in close contact with the top of the retaining ring (10).

6. The anti-contamination auxiliary sealing structure for the gas chromatograph inlet according to claim 5, characterized in that, Multiple Z-fixed seats (13) are fixedly connected to the surfaces of the mounting sleeve (4) and the connecting sleeve (5), and the bottom of the multiple Z-fixed seats (13) is fixedly connected to the top of the gas chromatograph (1).

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