Sample injection separation device of gas chromatograph

Abstract

The utility model discloses a gas chromatograph sample introduction separating device which comprises a sealing cylinder, the upper end and the lower end of the sealing cylinder are fixedly connected with an upper end cover and a lower end cover respectively, the middle position of the bottom end of the lower end cover is fixedly connected with a first connecting pipe, and the middle position of the upper end of the upper end cover is fixedly connected with a gas inlet pipe. According to the gas chromatograph, a sample to be detected can be extracted through the gas inlet pipe by virtue of the first gas extracting pump, large-particle foreign matters in the sample can be separated through the filter cover, and then the sample is pumped into the gas chromatograph through the first connecting pipe and the sample feeding pipe to be detected; a cleaning assembly can be driven to move along the filter cover through a first servo motor, a limiting rod and a screw rod, and the cleaning assembly can drive a second connecting ring to rotate around a first connecting ring through a second servo motor, a gear and a gear ring, so that a brush can be driven to clean the outer side of the filter cover; and the cleaned impurities can be pumped into the liquid storage tank to be stored through the arranged air pumping and filtering assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of sample introduction and separation devices, in particular to a sample introduction and separation device for a gas chromatograph. Background Art

[0002] Gas chromatograph refers to a chromatographic analysis instrument that uses gas as the mobile phase. Its principle is mainly to use the differences in the boiling point, polarity and adsorption properties of substances to achieve the separation of mixtures. After the sample to be analyzed is vaporized in the vaporization chamber, it is carried into the chromatographic column by the inert gas. The column contains a liquid or solid stationary phase, and each component in the sample tends to form a distribution or adsorption equilibrium between the mobile phase and the stationary phase. As the carrier gas flows, the sample components are repeatedly distributed or adsorbed / desorbed during movement. The components with a large distribution concentration in the carrier gas flow out of the chromatographic column first, and the components with a large distribution concentration in the stationary phase flow out later.

[0003] The Chinese patent with the patent publication number CN217605770U discloses a gas chromatograph with a gas filtering structure, which specifically relates to the technical field of gas detection equipment, including a gas chromatograph body, a control panel fixedly installed on the right front end of the gas chromatograph body, legs fixedly connected to the four corners of the lower end of the gas chromatograph body, a support plate fixedly connected to the lower left end of the gas chromatograph body, a support ring fixedly connected to the left end of the support plate, and a filter device fixedly connected to the upper end of the support ring. The gas chromatograph with a gas filtering structure described in the utility model draws the sample into the inner cavity of the separation shell through an air pump, filters it through a first filter screen, etc., and the clean sample enters the gas chromatograph body through an air outlet pipe, etc. for analysis, then turns on the vibrator, cleans the first filter screen, etc. through a mechanical connection, and finally rotates the second cover plate to pour out the dust, filters the air or sample, and improves the detection accuracy.

[0004] Traditional gas chromatographs generally lack a special dust collection mechanism, and large foreign particles in the air and samples will adhere to the injection pipe and injection port, thereby causing pollution to the injection pipe, injection port, and chromatographic column, affecting the analysis results and reducing the detection accuracy. In order to overcome these disadvantages, the utility model provides a gas chromatograph injection separation device. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides a gas chromatograph sample introduction and separation device.

[0006] In order to achieve the above-mentioned objectives, the utility model adopts the following technical scheme: a gas chromatograph sampling and separation device, comprising a sealing cylinder, the upper and lower ends of the sealing cylinder are respectively fixedly connected to the upper end cover and the lower end cover, the lower end of the lower end cover is fixedly connected to a first connecting pipe at the middle position of the bottom end of the lower end cover, the upper end of the upper end cover is fixedly connected to an intake pipe, the bottom end of the first connecting pipe is fixedly connected to a first suction pump, the output end of the first suction pump is fixedly connected to the sampling pipe, the upper end of the lower end cover is fixedly connected to a mounting ring, the upper end of the mounting ring is threadedly connected to a filter cover, a cleaning assembly is arranged on the outside of the filter cover, a limiting rod is fixedly connected to one side between the upper end cover and the lower end cover, a screw is rotatably connected to the other side between the upper end cover and the lower end cover, the lower end of the lower end cover is fixedly connected to an annular gas collecting shell at the position outside the first connecting tube, and an exhaust filter assembly is arranged on one side of the annular gas collecting shell.

[0007] Furthermore, a first valve is fixedly connected to the air intake pipe, and a third valve is fixedly connected to the first connecting pipe.

[0008] Furthermore, the cleaning component includes a first connecting ring, a second connecting ring is rotatably connected to the inner side of the first connecting ring, a brush is fixedly connected to the inner side of the second connecting ring, the brush contacts the outer side of the filter cover, a fixing plate is fixedly connected to the outer side of the first connecting ring, a second servo motor is fixedly connected to the upper end of the fixing plate, a gear is fixedly connected to the output end of the second servo motor through the fixing plate, a gear is fixedly connected to the outer side of the second connecting ring, and the gear is meshingly connected to the gear ring.

[0009] Furthermore, a first connecting block and a second connecting block are fixedly connected to the outer side of the first connecting ring, the first connecting block is slidably connected to the limit rod, the second connecting block is threadedly connected to the screw, a first servo motor is fixedly connected to one side of the upper end of the upper end cover, and the output end of the first servo motor is fixedly connected to the upper end of the screw.

[0010] Furthermore, the air extraction filter assembly includes a second connecting pipe fixedly connected to one side of the annular air collecting shell, a second valve is fixedly connected to the second connecting pipe, a liquid storage tank is provided on one side of the second connecting pipe, and one end of the second connecting pipe passes through the top of the liquid storage tank and is connected to the bottom end of the liquid storage tank.

[0011] Furthermore, a third connecting pipe is fixedly connected to the upper end of the liquid storage tank, a second air pump is fixedly connected to the upper end of the third connecting pipe, and a fourth connecting pipe is fixedly connected to the output end of the second air pump.

[0012] Beneficial effects of the utility model:

[0013] When the utility model is in use, the gas chromatograph sampling and separation device can extract the sample to be detected through the air inlet pipe through the first vacuum pump, separate the large particles of foreign matter in the sample through the filter cover, and then pump it into the gas chromatograph for detection through the first connecting pipe and the sampling tube; the cleaning component can be driven to move along the filter cover by the first servo motor, the limit rod and the screw; the cleaning component can be driven by the second connection to rotate around the first connecting ring through the second servo motor, the gear and the gear ring, so as to drive the brush to clean the outside of the filter cover; and the cleaned impurities can be sucked into the liquid storage tank for storage through the vacuum filter component. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 : A front view of the utility model;

[0016] Figure 2 : Bottom view of the utility model;

[0017] Figure 3 : Schematic diagram of the installation structure of the cleaning component of the utility model;

[0018] Figure 4 : Schematic diagram of the mounting structure of the mounting ring of the utility model;

[0019] Figure 5 : Schematic diagram of the cleaning component structure of the utility model.

[0020] The reference numerals are as follows:

[0021] 1. Sealing tube; 2. Upper end cover; 3. Lower end cover; 4. Air inlet pipe; 5. First valve; 6. First servo motor; 7. Annular gas collecting shell; 8. First connecting pipe; 9. First air pump; 10. Sample injection tube; 11. Second connecting pipe; 12. Second valve; 13. Liquid storage tank; 14. Third connecting pipe; 15. Second air pump; 16. Fourth connecting pipe; 17. Third valve; 18. Filter cover; 19. Limit rod; 20. Screw; 21. Cleaning assembly; 22. Mounting ring; 23. First connecting ring; 24. Second connecting ring; 25. Brush; 26. First connecting block; 27. Second connecting block; 28. Fixed plate; 29. ​​Second servo motor; 30. Gear; 31. Gear ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-5 As shown, it relates to a gas chromatograph sampling and separation device, including a sealing cylinder 1, the upper and lower ends of the sealing cylinder 1 are respectively fixedly connected with an upper end cover 2 and a lower end cover 3, the middle position of the bottom end of the lower end cover 3 is fixedly connected with a first connecting pipe 8, the middle position of the upper end of the upper end cover 2 is fixedly connected with an air inlet pipe 4, the bottom end of the first connecting pipe 8 is fixedly connected with a first air suction pump 9, the output end of the first air suction pump 9 is fixedly connected with an injection tube 10, the upper end of the lower end cover 3 is fixedly connected with a mounting ring 22, the upper end of the mounting ring 22 is threadedly connected with a filter cover 18, a cleaning component 21 is arranged on the outside of the filter cover 18, a limiting rod 19 is fixedly connected on one side between the upper end cover 2 and the lower end cover 3, a screw 20 is rotatably connected on the other side between the upper end cover 2 and the lower end cover 3, the lower end of the lower end cover 3 is fixedly connected with an annular gas collecting shell 7 at the position outside the first connecting tube 8, and an air suction filter component is arranged on one side of the annular gas collecting shell 7.

[0024] like Figure 1-5 As shown, the first valve 5 is fixedly connected to the air intake pipe 4 , and the third valve 17 is fixedly connected to the first connecting pipe 8 .

[0025] like Figure 1-5As shown, the cleaning assembly 21 includes a first connecting ring 23, the inner side of the first connecting ring 23 is rotatably connected to the second connecting ring 24, the inner side of the second connecting ring 24 is fixedly connected to the brush 25, the brush 25 contacts the outer side of the filter cover 18, the outer side of the first connecting ring 23 is fixedly connected to a fixing plate 28, the upper end of the fixing plate 28 is fixedly connected to a second servo motor 29, the output end of the second servo motor 29 passes through the fixing plate 28 and is fixedly connected to a gear 30, the outer side of the second connecting ring 24 is fixedly connected to a gear ring 31, the gear 30 is meshed with the gear ring 31, and the second servo motor 29 drives the gear 30 to rotate, which can drive the second connecting ring 24 fixed to the gear ring 31. By rotating around the first connecting ring 23, the brush 25 can be driven to clean the outside of the filter cover 18. The first connecting block 26 and the second connecting block 27 are fixedly connected to the outside of the first connecting ring 23. The first connecting block 26 is slidably connected to the limit rod 19, and the second connecting block 27 is threadedly connected to the screw 20. A first servo motor 6 is fixedly connected to one side of the upper end of the upper end cover 2, and the output end of the first servo motor 6 is fixedly connected to the upper end of the screw 20. The screw 20 is driven to rotate by the first servo motor 6, which can drive the cleaning component 21 to slide along the limit rod 19 through the first connecting block 26 and the second connecting block 27, so that it can move along the filter cover 18.

[0026] like Figure 1-5 As shown, the air extraction filter assembly includes a second connecting pipe 11 fixedly connected to one side of the annular air collecting shell 7, a second valve 12 is fixedly connected to the second connecting pipe 11, a liquid storage tank 13 is arranged on one side of the second connecting pipe 11, one end of the second connecting pipe 11 passes through the top of the liquid storage tank 13 and is connected to the bottom end of the liquid storage tank 13, a third connecting pipe 14 is fixedly connected to the upper end of the liquid storage tank 13, a second air extraction pump 15 is fixedly connected to the upper end of the third connecting pipe 14, and a fourth connecting pipe 16 is fixedly connected to the output end of the second air extraction pump 15. When the second air extraction pump 15 is started, the air and impurities in the sealing tube 1 are sucked into the liquid storage tank 13 through the annular air collecting shell 7 and the second connecting pipe 11, the impurities enter the liquid in the liquid storage tank 13, and the air is discharged through the third connecting pipe 14 and the fourth connecting pipe 16.

[0027] Working principle: When in use, the sample injection tube 10 is connected to the sample injection port of the gas chromatograph, the first valve 5 and the third valve 17 are opened, and the sample to be tested can be extracted through the air inlet pipe 4 by the first vacuum pump 9, and the large particles of foreign matter in the sample can be separated through the filter cover 18, and then pumped into the gas chromatograph for detection through the first connecting tube 8 and the sample injection tube 10. After the detection, the first valve 5 and the third valve 17 are closed, and the second valve 12 is opened. The screw 20 is driven to rotate by the first servo motor 6, which can drive the cleaning component 21 to slide along the limit rod 19 through the first connecting block 26 and the second connecting block 27, so that Moving along the filter cover 18, the cleaning component 21 can drive the gear 30 to rotate through the second servo motor 29, and can drive the second connecting ring 24 fixed to the gear ring 31 to rotate around the first connecting ring 23, so as to drive the brush 25 to clean the outside of the filter cover 18, and then the cleaned impurities can be sucked into the liquid storage tank 13 for storage through the set air extraction filter component. Specifically, the second air extraction pump 15 is started, and the air and impurities in the sealing tube 1 are sucked into the liquid storage tank 13 through the annular air collecting shell 7 and the second connecting pipe 11, and the impurities enter the liquid in the liquid storage tank 13, and the air is discharged through the third connecting pipe 14 and the fourth connecting pipe 16.

[0028] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A gas chromatograph sample introduction and separation device, comprising a sealing cylinder (1), characterized in that: The upper and lower ends of the sealing cylinder (1) are respectively fixedly connected to an upper end cover (2) and a lower end cover (3); the middle position of the bottom end of the lower end cover (3) is fixedly connected to a first connecting pipe (8); the middle position of the upper end of the upper end of the upper end cover (2) is fixedly connected to an air inlet pipe (4); the bottom end of the first connecting pipe (8) is fixedly connected to a first air pump (9); the output end of the first air pump (9) is fixedly connected to an injection pipe (10); the upper end of the lower end cover (3) is fixedly connected to a mounting ring (22); the mounting ring ( 22) The upper end is threadedly connected to a filter cover (18), a cleaning assembly (21) is arranged on the outside of the filter cover (18), a limiting rod (19) is fixedly connected between the upper end cover (2) and the lower end cover (3) on one side, a screw rod (20) is rotatably connected between the upper end cover (2) and the lower end cover (3) on the other side, and an annular air collecting shell (7) is fixedly connected to the lower end of the lower end cover (3) at a position outside the first connecting pipe (8), and an exhaust filter assembly is arranged on one side of the annular air collecting shell (7).

2. A gas chromatograph sample introduction and separation device according to claim 1, characterized in that: The air intake pipe (4) is fixedly connected to a first valve (5), and the first connecting pipe (8) is fixedly connected to a third valve (17).

3. A gas chromatograph sample introduction and separation device according to claim 1, characterized in that: The cleaning assembly (21) comprises a first connecting ring (23), the inner side of which is rotatably connected to a second connecting ring (24), the inner side of which is fixedly connected to a brush (25), the brush (25) being in contact with the outer side of the filter cover (18), the outer side of the first connecting ring (23) being fixedly connected to a fixing plate (28), the upper end of which is fixedly connected to a second servo motor (29), the output end of which passes through the fixing plate (28) and is fixedly connected to a gear (30), the outer side of the second connecting ring (24) being fixedly connected to a gear ring (31), the gear (30) being meshingly connected to the gear ring (31).

4. A gas chromatograph sample introduction and separation device according to claim 3, characterized in that: A first connecting block (26) and a second connecting block (27) are fixedly connected to the outer side of the first connecting ring (23); the first connecting block (26) is slidably connected to the limit rod (19); the second connecting block (27) is threadedly connected to the screw rod (20); a first servo motor (6) is fixedly connected to one side of the upper end of the upper end cover (2); and an output end of the first servo motor (6) is fixedly connected to the upper end of the screw rod (20).

5. A gas chromatograph sample introduction and separation device according to claim 1, characterized in that: The air extraction filter assembly comprises a second connecting pipe (11) fixedly connected to one side of the annular air collecting shell (7), a second valve (12) fixedly connected to the second connecting pipe (11), a liquid storage tank (13) being arranged on one side of the second connecting pipe (11), and one end of the second connecting pipe (11) passing through the top of the liquid storage tank (13) and connected to the bottom end of the liquid storage tank (13).

6. A gas chromatograph sample introduction and separation device according to claim 5, characterized in that: The upper end of the liquid storage tank (13) is fixedly connected to a third connecting pipe (14), the upper end of the third connecting pipe (14) is fixedly connected to a second air pump (15), and the output end of the second air pump (15) is fixedly connected to a fourth connecting pipe (16).

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