A new type of gas chromatograph with high accuracy

Abstract

This utility model discloses a novel gas chromatograph with high accuracy, comprising: a connector, a nut, and a polyethylene tube; it also includes a sealing gasket, a sealing ring, and a sealing liner. The sealing liner is a metal cylindrical tube inserted into one end of the polyethylene tube. The nut, sealing gasket, sealing ring, and connector are sequentially fitted onto one end of the polyethylene tube. Tightening the connector and nut compresses the sealing gasket. This utility model sets a sealing gasket and a sealing ring between the connector and the nut. As the connector and nut are tightened, the sealing gasket is compressed and deformed, generating a high-pressure wrapping force on the outer wall of the polyethylene tube. This wrapping force drives the polyethylene tube and the sealing liner to fit tightly together, achieving a sealing effect. The sealing ring is located between the connector and the sealing gasket. The sealing ring is also compressed and deformed, further compressing the polyethylene tube and the sealing liner to fit tightly together, improving the tightness of the connection between the connector and the polyethylene tube.

Description

Technical Field

[0001] This utility model belongs to the field of gas chromatography technology, specifically, it relates to a novel gas chromatograph with high accuracy. Background Technology

[0002] A gas chromatograph is an instrument that uses chromatographic separation and detection techniques to perform qualitative and quantitative analysis of complex mixtures of multiple components. In operation, the sample is vaporized in the injection port and carried by a carrier gas into the chromatographic column. Passing through the column, which has different retention properties for the components in the mixture, the components are separated and sequentially introduced into the detector to obtain the detection signal for each component. By comparing the order in which the components are introduced into the detector, their individual components can be identified, and their content can be calculated based on peak height or peak area.

[0003] Gas chromatographs introduce carrier gas, which flows in the gas path connecting the connector and the tubing. The carrier gas is usually hydrogen or nitrogen. Hydrogen is flammable, so leaks are likely to occur at the connectors where the tubing connects to the structure, especially the connection between the hose and the metal connector, where the sealing effect is poor. To solve this problem, a new type of gas chromatograph with high accuracy has been developed. Utility Model Content

[0004] In view of this, the technical problem to be solved by this utility model is to provide a new type of gas chromatograph with high accuracy, which solves the problem of poor sealing effect of the connection between the hose and the metal connector in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model discloses a novel gas chromatograph with high accuracy, including: a connector, a nut, and a polyethylene tube; it also includes a sealing gasket, a sealing ring, and a sealing liner. The sealing liner is a metal cylindrical tube and is inserted into one end of the polyethylene tube. The nut, sealing gasket, sealing ring, and connector are sequentially fitted onto one end of the polyethylene tube. The connector and nut are tightened to compress the sealing gasket, and the sealing gasket compresses the polyethylene tube, so that the polyethylene tube and the sealing liner form a compression seal.

[0006] Furthermore, the aforementioned sealing gasket is a cone with a perforation in the center, and its material is phosphor bronze.

[0007] Furthermore, the aforementioned sealing gasket is made of stainless steel tubing.

[0008] Furthermore, the bottom surface of the connecting groove of the aforementioned nut is a conical surface.

[0009] Furthermore, the sealing ring mentioned above is made of polytetrafluoroethylene.

[0010] Compared with the prior art, this application can achieve the following technical effects:

[0011] This invention involves inserting a sealing gasket inside a polyethylene pipe and setting a sealing washer and a sealing ring between the joint and the nut. As the joint and nut are tightened, the sealing washer is compressed and deformed, generating a high-pressure wrapping force on the outer wall of the polyethylene pipe. This wrapping force drives the polyethylene pipe and the sealing gasket to fit tightly together, achieving a sealing effect. The sealing ring is located between the joint and the sealing gasket. The sealing ring is also compressed and deformed, further compressing the polyethylene pipe and the sealing gasket to fit tightly together, improving the tightness of the connection between the joint and the polyethylene pipe.

[0012] Of course, any product implementing this application does not necessarily need to achieve all of the technical effects described above at the same time. Attached Figure Description

[0013] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0014] Figure 1 This is an exploded view of the connection between the connector and the pipe body according to one embodiment of the present invention.

[0015] Figure 2 This is a cross-sectional schematic diagram of the connection between the connector and the pipe body according to one embodiment of this utility model.

[0016] Attached Figure Labels

[0017] 1. Connector; 2. Nut; 3. Polyethylene pipe; 4. Sealing washer; 5. Sealing ring; 6. Sealing gasket; 7. Conical surface. Detailed Implementation

[0018] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0019] Please refer to Figure 1 and Figure 2 , Figure 1 This is an exploded view of the connection between the connector and the pipe body according to one embodiment of the present invention. Figure 2 This is a cross-sectional schematic diagram of the connection between the connector and the pipe body according to one embodiment of this utility model.

[0020] A novel gas chromatograph with high accuracy includes: a connector 1, a nut 2, and a polyethylene tube 3; it also includes a sealing washer 4, a sealing ring 5, and a sealing gasket 6. The sealing gasket 6 is a metal cylindrical tube and is inserted into one end of the polyethylene tube 3. The nut 2, sealing washer 4, sealing ring 5, and connector 1 are sequentially fitted onto one end of the polyethylene tube 3. The connector 1 is threadedly connected to the nut 2 and tightened to compress the sealing washer 4. The sealing washer 4 compresses the polyethylene tube 3, so that the polyethylene tube 3 and the sealing gasket 6 form a compression seal.

[0021] The sealing gasket 4 is a cone with a perforation in the middle, and its material is phosphor bronze, which has good ductility; the sealing gasket 6 is a stainless steel tube; the bottom surface of the connecting groove of the nut 2 is a conical surface 7; the sealing ring 5 is made of polytetrafluoroethylene.

[0022] The main gas pipeline uses Φ3×0.5 polyethylene pipe 3. The purpose of the sealing gasket 4 is to enhance the strength of the conduit at the sealing point to ensure gas flow and sealing performance. The sealing gasket 4 is Φ2×0.5 stainless steel pipe. The sealing ring 5 uses Φ5×1 polytetrafluoroethylene pipe with a length of 5mm.

[0023] This invention inserts a sealing gasket 6 inside a polyethylene pipe 3, and sets a sealing washer 4 and a sealing ring 5 between the connector 1 and the nut 2. As the connector 1 and the nut 2 are tightened, the sealing washer 4 is squeezed and deformed, which can generate a high-pressure wrapping force on the outer wall of the polyethylene pipe 3. The wrapping force drives the polyethylene pipe 3 and the sealing gasket 6 to fit tightly together, thus achieving a sealing effect. The sealing ring 5 is located between the connector 1 and the sealing gasket 4. The sealing ring 5 is also squeezed and deformed, further squeezing the polyethylene pipe 3 and the sealing gasket 6 to fit tightly together, improving the tightness of the connection between the connector 1 and the polyethylene pipe 3.

[0024] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A new generation of gas chromatograph with high accuracy, comprising: Connectors, nuts, and polyethylene pipes; The feature is that it further includes a sealing gasket, a sealing ring, and a sealing liner. The sealing liner is a metal cylindrical tube and is inserted into one end of the polyethylene tube. The nut, sealing gasket, sealing ring, and connector are sequentially sleeved on one end of the polyethylene tube. The connector and the nut are tightened to compress the sealing gasket, and the sealing gasket compresses the polyethylene tube, so that the polyethylene tube and the sealing liner form a compression seal.

2. The new type of gas chromatograph with high accuracy according to claim 1, characterized in that, The sealing gasket is a cone with a perforation in the middle, and its material is phosphor bronze.

3. The new type of gas chromatograph with high accuracy according to claim 1, characterized in that, The sealing gasket is made of stainless steel tubing.

4. The new type of gas chromatograph with high accuracy according to claim 1, wherein, The bottom surface of the connecting groove of the nut is a conical surface.

5. The accuracy-strengthened new gas chromatograph according to claim 1, wherein The sealing ring is made of polytetrafluoroethylene.

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