Sample inlet sealing device of gas chromatograph-mass spectrometer

Abstract

The utility model belongs to the technical field of gas chromatography detection, and particularly relates to a sample inlet sealing device of a gas chromatograph-mass spectrometer, which comprises a sealing cover and a rubber pad, the rubber pad is inserted into an inner cavity of the sealing cover, the sealing cover is mounted on the surface of a mounting plate, the mounting plate is movably mounted on the surface of a supporting plate, and the supporting plate is movably mounted on the inner cavity of the sealing cover. A guide rotating roller is rotationally connected to the surface of one end of the supporting plate, the guide rotating roller is inserted into the arc-shaped guide frame, and a lifting seat is welded to the surface of the end, away from the guide rotating roller, of the supporting plate; under the guiding effect of the arc-shaped guide frame, the supporting plate can rotate in the lifting process, after the supporting plate descends, the sealing cover can move to one side of the sample inlet, the sealing cover is made to avoid the sample inlet, the sealing cover is prevented from hindering sample discharging in the sample feeding process, after the supporting plate is lifted, the sealing cover is arranged on the surface of the sample inlet in a sleeving mode through a rubber pad, and the sealing cover is prevented from blocking sample discharging. And the worm gear and the worm are matched and have a self-locking function, so that the sealing cover can be prevented from being loosened, and the sealing effect on the sample inlet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatography detection, in particular to an injection port sealing device of a gas chromatography-mass spectrometry instrument. Background Art

[0002] Gas chromatography-mass spectrometry is widely used in the fields of environmental protection, electronics, textiles, petrochemicals, flavors and fragrances, pharmaceuticals, agriculture, and food safety. It is used to analyze pollution in the air, water, and soil, analyze pesticide residues, animal residues, and drug residues, analyze the aroma components of flavors and fragrances, and detect harmful substances in the textile industry.

[0003] The invention patent currently published with the publication number CN217899075U discloses an injection port sealing mechanism of a gas chromatograph-mass spectrometer, comprising an equipment main body, a connecting component is arranged on the right side of the equipment main body, a universal component is arranged on the side of the connecting component, an injection tube is arranged on the side of the universal component, a sealing component is arranged on the outside of the injection tube and the universal component, and a fixing component is arranged on the outside of the sealing component and the injection tube. The utility model relates to the technical field of gas chromatograph-mass spectrometer; the injection port sealing mechanism of the gas chromatograph-mass spectrometer has a plurality of options through the diameter of the fixed tube, and the corresponding insertion grooves have a plurality of sizes. The mounting tube is screwed inside the fixing hole, thereby facilitating the replacement of fixed tubes of different diameters, and injection tubes of different diameters are installed through fixed tubes of different diameters and the insertion grooves, thereby achieving the effect of being suitable for injection tubes of different diameters.

[0004] The existing injection port sealing structure is located below the injection port, and the sealing structure moves straight up and down below the injection port. After the sealing structure is opened, the sealing structure will obstruct the sample during the process of the injection port discharging the sample, causing the discharged sample to be sprayed on the sealing structure, which will affect the normal discharge of the sample. In order to solve the above problem, this application proposes an injection port sealing device for a gas chromatograph-mass spectrometer. Utility Model Content

[0005] (1) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes an injection port sealing device for a gas chromatograph-mass spectrometer. Under the guiding action of the arc-shaped guide frame, the support plate can rotate during lifting and lowering. After the support plate is lowered, the sealing cover can be moved to the side of the injection port, so that the sealing cover avoids the injection port, thereby preventing the sealing cover from obstructing the discharge of the sample during injection. After the support plate is lifted, the sealing cover is arranged on the surface of the injection port through a rubber gasket, and the worm gear and worm are matched with a self-locking function, which can prevent the sealing cover from loosening, thereby improving the sealing effect of the injection port, thereby solving the problems raised in the background technology.

[0007] (2) Technical solution

[0008] In order to solve the above technical problems, the utility model provides an injection port sealing device for a gas chromatography-mass spectrometer, comprising a sealing cover and a rubber pad, wherein the rubber pad is inserted into the inner cavity of the sealing cover, the sealing cover is mounted on the surface of a mounting plate, the mounting plate is movably mounted on the surface of a support plate, and a guide roller is rotatably connected to the surface of one end of the support plate, and the guide roller is inserted into an arc-shaped guide frame;

[0009] A lifting seat is welded on the surface of one end of the support plate away from the guide roller. A driving screw rod is connected through a thread on the lifting seat. A gear box is provided on the top of the driving screw rod. A driving motor is installed on the side wall of the gear box.

[0010] Preferably, fixing seats are welded to both ends of the arc-shaped guide frame.

[0011] Preferably, a worm gear is rotatably provided in the inner cavity of the gear box, and the top of the driving screw rod passes through the bottom cavity wall of the gear box and is welded to the lower surface of the worm gear.

[0012] Preferably, one side of the worm wheel is connected to a worm, and the end of the worm passes through the gear box cavity wall and is connected to the power output end of the drive motor.

[0013] Preferably, the bottom of the driving screw is rotatably connected to a rotating seat.

[0014] Preferably, a dovetail splicing socket is integrally formed on the lower surface of the mounting plate, and the dovetail splicing sockets are symmetrically distributed. A dovetail splicing slot is provided on the upper surface of the support plate corresponding to the position of the dovetail splicing socket, and the dovetail splicing socket is plugged into the dovetail splicing slot.

[0015] Preferably, fixing holes are provided at the corners of the surfaces of the mounting plate and the supporting plate, and locking screws are threadedly connected to the fixing holes.

[0016] The above technical solution of the utility model has the following beneficial technical effects:

[0017] 1. In the utility model, a driving motor and a gear box are matched to drive a driving screw to rotate. The driving screw drives the sealing cover to rise and fall through a lifting seat under the action of a surface thread. The guide roller moves in an arc-shaped guide frame, which can guide the support plate so that the support plate can rotate during lifting. The sealing cover is installed on the surface of the support plate through a mounting plate. After the support plate is lowered, the sealing cover can be moved to the side of the sampling port so that the sealing cover avoids the sampling port and prevents the sealing cover from obstructing the discharge of the sample during injection. After the support plate is lifted, the sealing cover is arranged on the surface of the sampling port through a rubber gasket, and the worm gear and worm are matched with a self-locking function to prevent the sealing cover from loosening, thereby improving the sealing effect of the sampling port.

[0018] 2. In the present invention, the bottom of the mounting plate is fixed to the surface of the support plate by plugging the dovetail splicing socket and the dovetail splicing slot. After the fixing holes of the mounting plate and the support plate surface are overlapped, they are fixed by a locking screw, which can realize the rapid replacement of the sealing cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a gas chromatography-mass spectrometry inlet sealing device of the utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of a sealing cover of an injection port sealing device of a gas chromatography-mass spectrometer according to the present invention;

[0021] Figure 3 This is a schematic structural diagram of an arc-shaped guide frame of a sealing device for an injection port of a gas chromatograph-mass spectrometer according to the present invention;

[0022] Figure 4 The utility model is a schematic diagram of the internal structure of a gear box of an injection port sealing device of a gas chromatography-mass spectrometer.

[0023] Reference numerals:

[0024] 1. Sealing cover; 2. Rubber pad; 3. Mounting plate; 4. Support plate; 5. Dovetail splicing slot; 6. Dovetail splicing socket; 7. Fixing hole; 8. Guide roller; 9. Arc guide frame; 10. Fixed seat; 11. Lifting seat; 12. Gear box; 13. Drive motor; 14. Drive screw; 15. Rotating seat; 16. Worm gear; 17. Worm. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0026] like Figure 1-4 As shown, the utility model proposes a gas chromatography-mass spectrometry inlet sealing device, comprising a sealing cover 1 and a rubber pad 2, the rubber pad 2 being inserted into the inner cavity of the sealing cover 1, the sealing cover 1 being mounted on the surface of a mounting plate 3, the mounting plate 3 being movably mounted on the surface of a support plate 4, one end surface of the support plate 4 being rotatably connected to a guide roller 8, the guide roller 8 being inserted into an arc-shaped guide frame 9;

[0027] A lifting seat 11 is welded to the surface of one end of the support plate 4 away from the guide roller 8. A driving screw 14 is threadedly connected to the lifting seat 11. A gear box 12 is provided on the top of the driving screw 14. A driving motor 13 is installed on the side wall of the gear box 12.

[0028] It should be noted that the driving motor 13 drives the worm 17 in the gear box 12, and the worm 17 drives the worm wheel 16 to rotate, and the worm wheel 16 synchronously drives the driving screw 14 to rotate. The driving screw 14 drives the support plate 4 to rise and fall through the lifting seat 11 under the action of the surface thread. The end of the support plate 4 is inserted into the arc guide frame 9 through the guide roller 8. The guide roller 8 moves in the arc guide frame 9, which can guide the support plate 4 so that the support plate 4 can rotate during lifting. The sealing cover 1 is installed on the surface of the support plate 4 through the mounting plate 3. After the support plate 4 is lowered, the sealing cover 1 can be moved to the side of the sampling port, so that the sealing cover 1 avoids the sampling port to avoid the sealing cover 1 blocking the discharge of the sample during injection. After the support plate 4 is lifted, the sealing cover 1 is sleeved on the surface of the sampling port through the rubber pad 2, and the worm wheel 16 and the worm 17 are matched with a self-locking function to prevent the sealing cover 1 from loosening, so as to improve the sealing effect of the sampling port.

[0029] In this embodiment, if Figure 3 As shown, fixing seats 10 are welded to both ends of the arc-shaped guide frame 9 .

[0030] It should be noted that both ends of the arc-shaped guide frame 9 can be fixed by fixing seats 10 .

[0031] In this embodiment, if Figure 1 and Figure 4 As shown, a worm gear 16 is provided for rotation in the inner cavity of the gear box 12, the top of the driving screw 14 passes through the bottom cavity wall of the gear box 12 and is welded to the lower surface of the worm gear 16, and a worm 17 is connected to one side of the worm gear 16 for transmission, and the end of the worm 17 passes through the cavity wall of the gear box 12 and is connected to the power output end of the drive motor 13.

[0032] It should be noted that the drive motor 13 drives the worm 17 in the gear box 12, the worm 17 drives the worm wheel 16 to rotate, and the worm wheel 16 synchronously drives the drive screw 14 to rotate. The drive screw 14 drives the support plate 4 to rise and fall through the lifting seat 11 under the action of the surface thread.

[0033] In this embodiment, if Figure 1 As shown, the bottom of the driving screw rod 14 is rotatably connected to a rotating seat 15.

[0034] It should be noted that the bottom of the driving screw rod 14 is rotatably connected to the rotating seat 15 , and the rotating seat 15 can limit the bottom of the driving screw rod 14 to improve the coaxiality of the driving screw rod 14 during rotation.

[0035] In this embodiment, if Figure 2 As shown, a dovetail splicing socket 6 is integrally formed on the lower surface of the mounting plate 3, and the dovetail splicing socket 6 is symmetrically distributed. A dovetail splicing slot 5 is provided on the upper surface of the support plate 4 at a position corresponding to the position of the dovetail splicing socket 6. The dovetail splicing socket 6 is plugged into the dovetail splicing slot 5. Fixing holes 7 are provided at the corners of the surfaces of the mounting plate 3 and the support plate 4, and a locking screw is connected to the inner thread of the fixing hole 7.

[0036] It should be noted that the bottom of the mounting plate 3 is fixed to the surface of the support plate 4 through the dovetail splicing socket 6 and the dovetail splicing slot 5. After the fixing holes 7 on the surfaces of the mounting plate 3 and the support plate 4 overlap, they are fixed by a locking screw, which can realize the rapid replacement of the sealing cover 1.

[0037] The working principle and use process of the utility model are as follows: the driving motor 13 drives the worm 17 in the gear box 12, the worm 17 drives the worm wheel 16 to rotate, and the worm wheel 16 synchronously drives the driving screw 14 to rotate. The driving screw 14 drives the support plate 4 to rise and fall through the lifting seat 11 under the action of the surface thread. The end of the support plate 4 is inserted into the arc guide frame 9 through the guide roller 8. The guide roller 8 moves in the arc guide frame 9, which can guide the support plate 4 so that the support plate 4 can rotate during the lifting. The sealing cover 1 is installed on the surface of the support plate 4 through the mounting plate 3. The support plate 4 is lowered. After that, the sealing cover 1 can be moved to the side of the sampling port, so that the sealing cover 1 avoids the sampling port, so as to avoid the sealing cover 1 blocking the discharge of the sample during sampling. After the support plate 4 is lifted, the sealing cover 1 is sleeved on the surface of the sampling port through the rubber pad 2, and the worm gear 16 and the worm 17 are matched with a self-locking function to prevent the sealing cover 1 from loosening, so as to improve the sealing effect of the sampling port. The bottom of the mounting plate 3 is fixed to the surface of the support plate 4 by plugging and connecting the dovetail splicing socket 6 and the dovetail splicing slot 5. The fixing holes 7 on the surfaces of the mounting plate 3 and the support plate 4 are overlapped and fixed by a locking screw, so that the sealing cover 1 can be quickly replaced.

[0038] It should be understood that the above-described specific embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and do not constitute limitations of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the scope of protection of the present invention. In addition, the appended claims of the present invention are intended to cover all variations and modifications that fall within the scope and metes and bounds of the appended claims or their equivalents.

Claims

1. A gas chromatography-mass spectrometry inlet sealing device, comprising a sealing cover (1) and a rubber pad (2), wherein the rubber pad (2) is plugged into the inner cavity of the sealing cover (1), characterized in that: The sealing cover (1) is mounted on the surface of a mounting plate (3), the mounting plate (3) is movably mounted on the surface of a support plate (4), one end surface of the support plate (4) is rotatably connected to a guide roller (8), and the guide roller (8) is inserted into an arc-shaped guide frame (9); A lifting seat (11) is welded to the surface of one end of the support plate (4) away from the guide roller (8); a driving screw rod (14) is threadedly connected to the lifting seat (11); a gear box (12) is provided on the top of the driving screw rod (14); and a driving motor (13) is installed on the side wall of the gear box (12).

2. The gas chromatography-mass spectrometry inlet sealing device according to claim 1, wherein: Both ends of the arc-shaped guide frame (9) are welded with fixing seats (10).

3. The gas chromatography-mass spectrometry inlet sealing device according to claim 2, wherein: A worm wheel (16) is rotatably provided in the inner cavity of the gear box (12), and the top of the driving screw rod (14) passes through the bottom cavity wall of the gear box (12) and is welded to the lower surface of the worm wheel (16).

4. The gas chromatography-mass spectrometry inlet sealing device according to claim 3, wherein: One side of the worm wheel (16) is connected to a worm (17) in a transmission manner. The end of the worm (17) passes through the cavity wall of the gear box (12) and is connected to the power output end of the drive motor (13).

5. The gas chromatography-mass spectrometry inlet sealing device according to claim 4, characterized in that: The bottom of the driving screw rod (14) is rotatably connected to a rotating seat (15).

6. The gas chromatography-mass spectrometry inlet sealing device according to claim 1, characterized in that: A dovetail splicing socket (6) is integrally formed on the lower surface of the mounting plate (3), and the dovetail splicing socket (6) is symmetrically distributed. A dovetail splicing slot (5) is provided on the upper surface of the support plate (4) at a position corresponding to the dovetail splicing socket (6), and the dovetail splicing socket (6) is plugged into the dovetail splicing slot (5).

7. The gas chromatography-mass spectrometry inlet sealing device according to claim 6, characterized in that: The corners of the surfaces of the mounting plate (3) and the supporting plate (4) are both provided with fixing holes (7), and the fixing holes (7) are internally threadedly connected with locking screws.

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