Waterproof device for gas chromatography mass spectrometer

Abstract

The utility model discloses a waterproof device for a gas chromatography mass spectrometer, which belongs to the technical field of gas chromatography mass spectrometers and comprises a conical air entraining cover, the top end of the conical air entraining cover is fixedly connected with an inverted U-shaped guide pipe, and the bottom of one end of the inverted U-shaped guide pipe is fixedly connected with a U-shaped liquid collecting pipe. According to the utility model, when the air entraining pump, the air entraining steel pipe, the U-shaped liquid collecting pipe, the inverted U-shaped guide pipe and the conical air entraining cover are utilized to pump out a vaporized solvent, the vaporized solvent is liquefied in the conical air entraining cover, and the solvent is attached to the inner wall of the conical air entraining cover; liquid on the inner wall of the conical air entraining cover is scraped into the liquid guide groove box through the scraping plate, and meanwhile, the liquid in the liquid guide groove box is guided into the liquid receiving groove to be collected by utilizing centrifugal force generated by rotation of the liquid guide groove box, so that the function of completely collecting solvent liquid in the conical air entraining cover is realized; and the practicability of the waterproof device for the gas chromatography-mass spectrometer is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas chromatography-mass spectrometry technology, and more specifically, to a waterproof device for gas chromatography-mass spectrometry. Background Technology

[0002] Gas chromatography-mass spectrometry (GC-MS) is an instrument that combines the high separation efficiency of gas chromatography with the unique selectivity, sensitivity, relative molecular mass, and molecular structure identification capabilities of mass spectrometry. Its principle involves the vaporization and separation of a multi-component mixture by gas chromatography. The components enter the mass spectrometer sequentially according to their retention time. The gas molecules of each component are ionized in the ion source, generating positively charged ions with different mass-to-charge ratios. These ions are accelerated by an electric field to form an ion beam, which enters the mass analyzer and is separated according to their mass-to-charge ratio. Finally, the detector detects the electrical signal converted from the ion beam current, which is then sent to a computer. These signals are processed by the computer to obtain chromatograms, mass spectra, and other information.

[0003] A search revealed that utility model patent CN210128957U discloses a waterproof device for a gas chromatograph-mass spectrometer, comprising a chromatograph body and an exhaust pipe. An exhaust hood is installed on the exhaust pipe, and a receiving frame is located at the inner edge of the exhaust hood. An outlet is formed on the lower surface of the receiving frame. Multiple receiving slots are formed on the receiving frame, each connected to a guide rod. These guide rods are gradually inclined in an arc shape near the center of the exhaust pipe cross-section and are interconnected. Multiple guide columns are formed on each guide rod. A confluence channel and a guide groove are respectively formed on the guide rod and guide columns to guide condensed water droplets. The guide groove is connected to the confluence channel. A guide frame is located below the guide rod to collect condensed water droplets on its lower surface. This patent can collect solvent droplets generated after the vaporized solvent condenses during chromatograph use, preventing solvent droplets from falling onto the gas chromatograph. However, the above-mentioned patents still have the following shortcomings: Although the liquefied solvent can be collected by structures such as the diversion rod, diversion column, and guide frame, these structures are not convenient for completely collecting the solvent inside the gas hood. When the solvent does not come into contact with the diversion rod, diversion column, and guide frame, it will fall off, which is not very practical. In addition, the receiving tank is generally located at a high place, and manual cleaning requires climbing up, which is not very convenient. Therefore, we propose a waterproof device for gas chromatograph-mass spectrometers. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a waterproof device for gas chromatograph-mass spectrometer.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A waterproof device for a gas chromatograph-mass spectrometer includes a conical gas hood. An inverted U-shaped conduit is fixedly connected to the top of the conical gas hood. A U-shaped liquid collection tube is fixedly connected to the bottom of one end of the inverted U-shaped conduit. A gas priming steel pipe is fixedly connected to the top of one end of the U-shaped liquid collection tube. A liquid receiving groove is provided at the bottom of the conical gas hood. A liquid drainage mechanism is provided at the bottom of the conical gas hood. A mounting plate is fixedly connected to the top surface of the inverted U-shaped conduit. A servo motor is fixedly mounted on the top surface of the mounting plate. The output shaft of the servo motor extends into the inner cavity of the conical gas hood and is fixedly connected to a liquid priming tank. A scraper is provided on one side of the liquid priming tank, and the end face of the scraper is in contact with the inner wall of the conical gas hood.

[0007] As a preferred embodiment of this utility model, the draining mechanism includes an L-shaped drain pipe fixedly sleeved at the bottom of the conical air hood. One end of the L-shaped drain pipe is fixedly sleeved to the inner cavity of the liquid receiving tank, and the other end of the L-shaped drain pipe is fixedly connected to a spiral hose. The bottom end of the spiral hose is fixedly connected to a drain pipe, and a switch valve is fixedly installed at the bottom end of the drain pipe.

[0008] As a preferred embodiment of this utility model, the bottom end of the U-shaped liquid collecting tube is fixedly sleeved with a liquid guiding tube, and the bottom end of the liquid guiding tube is fixedly sleeved into the inner cavity of the liquid receiving tank.

[0009] As a preferred embodiment of this utility model, an air pump is fixedly installed at the top end of the air duct, and an exhaust pipe is fixedly connected to the output end of the air pump.

[0010] As a preferred embodiment of this utility model, a support column is fixedly connected to the side of the inverted U-shaped conduit, and the top of the support column is connected to the bottom surface of the mounting plate.

[0011] As a preferred embodiment of this utility model, an inner inclined surface is provided on the inner side of the bottom end of the conical air duct cavity.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] (1) In this utility model, when the vaporized solvent is extracted using an air pump, an air priming steel pipe, a U-shaped liquid collection pipe, an inverted U-shaped conduit and a conical air priming hood, the vaporized solvent liquefies in the conical air priming hood, and the solvent liquid adheres to the inner wall of the conical air priming hood. In addition, the servo motor drives the liquid priming tank and scraper to rotate, and the scraper scrapes the liquid on the inner wall of the conical air priming hood into the liquid priming tank. At the same time, the centrifugal force generated by the rotation of the liquid priming tank guides the liquid in the liquid priming tank into the liquid receiving tank for collection, thereby realizing the function of completely collecting the solvent liquid in the conical air priming hood and improving the practicality of the waterproof device of the gas chromatograph-mass spectrometer.

[0014] (2) In this utility model, by using the L-shaped liquid outlet pipe, spiral hose, drain pipe and switch valve together, the switch valve is opened at regular intervals so that the solvent liquid collected in the liquid receiving tank is discharged from the L-shaped liquid outlet pipe, spiral hose, drain pipe and switch valve, avoiding the problem that the staff need to climb up to handle the solvent liquid in the liquid receiving tank, and improving the practicality of the waterproof device for gas chromatograph-mass spectrometer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional schematic diagram of the conical air duct of this utility model;

[0017] Figure 3 This is a schematic diagram of the liquid inlet box of this utility model;

[0018] Figure 4 This is a schematic diagram of the liquid discharge mechanism of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Conical air hood; 2. Inverted U-shaped conduit; 3. U-shaped liquid collection pipe; 4. Air venting steel pipe; 5. Liquid receiving tank; 6. Liquid guide pipe; 7. Liquid drainage mechanism; 8. Mounting plate; 9. Servo motor; 10. Liquid venting box; 11. Scraper; 12. L-shaped liquid outlet pipe; 13. Spiral hose; 14. Liquid drain pipe; 15. Switch valve; 16. Inner inclined surface; 17. Air venting pump; 18. Exhaust pipe; 19. Support column. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example:

[0025] Please see Figure 1-4 A waterproof device for a gas chromatograph-mass spectrometer includes a conical gas hood 1. An inverted U-shaped conduit 2 is fixedly connected to the top of the conical gas hood 1. A U-shaped liquid collection tube 3 is fixedly connected to the bottom of one end of the inverted U-shaped conduit 2. A gas hood steel pipe 4 is fixedly connected to the top of one end of the U-shaped liquid collection tube 3. A liquid receiving groove 5 is provided at the bottom of the conical gas hood 1. A liquid drainage mechanism 7 is provided at the bottom of the conical gas hood 1. An mounting plate 8 is fixedly connected to the top surface of the inverted U-shaped conduit 2. A servo motor 9 is fixedly mounted on the top surface of the mounting plate 8. The output shaft of the servo motor 9 extends into the inner cavity of the conical gas hood 1 and is fixedly connected to a liquid collection box 10. A scraper 11 is provided on one side of the liquid collection box 10. The end face of the scraper 11 is in contact with the inner wall of the conical gas hood 1.

[0026] For details, please refer to Figure 1 , Figure 2 and Figure 4 The drainage mechanism 7 includes an L-shaped outlet pipe 12 fixedly sleeved at the bottom of the conical air hood 1. One end of the L-shaped outlet pipe 12 is fixedly sleeved to the inner cavity of the liquid receiving tank 5. The other end of the L-shaped outlet pipe 12 is fixedly connected to a spiral hose 13. The bottom end of the spiral hose 13 is fixedly connected to a drainage pipe 14. A switch valve 15 is fixedly installed at the bottom end of the drainage pipe 14.

[0027] In this embodiment, the solvent in the liquid tank 5 is discharged through the L-shaped liquid outlet pipe 12, the spiral hose 13, and the liquid drain pipe 14.

[0028] For details, please refer to Figure 1 and Figure 2 The bottom end of the U-shaped liquid collecting tube 3 is fixedly sleeved with a liquid guiding tube 6, and the bottom end of the liquid guiding tube 6 is fixedly sleeved into the inner cavity of the liquid receiving tank 5.

[0029] In this embodiment, the solvent collected in the inner cavity of the U-shaped liquid collecting pipe 3 is introduced into the liquid receiving tank 5 through the liquid guiding pipe 6 so that it can be centrally discharged from the liquid receiving tank 5.

[0030] For details, please refer to Figure 1An air pump 17 is fixedly installed at the top of the air duct 4, and an exhaust pipe 18 is fixedly connected to the output end of the air pump 17.

[0031] In this embodiment, the sump pump 17 generates suction in the conical sump hood 1, so that the conical sump hood 1 draws the vaporized solvent upward. In addition, the exhaust gas is discharged through the exhaust pipe 18. Furthermore, the sump pump 17 can be installed on the roof.

[0032] For details, please refer to Figure 2 The side of the inverted U-shaped conduit 2 is fixedly connected to a support column 19, and the top of the support column 19 is connected to the bottom surface of the mounting plate 8.

[0033] In this embodiment, the mounting plate 8 is supported by the support column 19.

[0034] For details, please refer to Figure 2 An inner inclined surface 16 is provided on the inner side of the bottom end of the conical air hood 1.

[0035] In this embodiment, the inner inclined surface 16 is ensured not to come into contact with the vaporized solvent, so that the vaporized solvent enters the inner cavity of the conical air duct 1.

[0036] Working principle: In use, first place the conical gas hood 1 directly above the gas chromatograph-mass spectrometer, and start the gas hood pump 17 to generate suction in the conical gas hood 1. The suction of the conical gas hood 1 draws the vaporized solvent into its inner cavity. Simultaneously, the vaporized solvent in the inner cavity of the conical gas hood 1 enters the U-shaped collection tube 3 through the inverted U-shaped conduit 2. The vaporized solvent liquefies within the inner cavities of the conical gas hood 1, the inverted U-shaped conduit 2, and the U-shaped collection tube 3, and the liquefied solvent adheres to the inner walls of these components. Then, the gas is discharged from the gas hood steel pipe 4 and the exhaust pipe 18. At the same time, the gas liquefies at one end of the inner cavity of the inverted U-shaped conduit 2... Liquid flows into the U-shaped liquid collection pipe 3, and the liquid in the U-shaped liquid collection pipe 3 flows into the liquid receiving tank 5 through the liquid guide pipe 6. In addition, the servo motor 9 is started to drive the liquid inlet box 10 and the scraper 11 to rotate. The scraper 11 scrapes the liquid on the inner wall of the conical air hood 1, thereby scraping off the liquid on the inner wall of the conical air hood 1. The scraped liquid enters the liquid inlet box 10. The centrifugal force generated by the rotation of the liquid inlet box 10 guides the liquid in the liquid inlet box 10 into the liquid receiving tank 5 for collection. Finally, the switch valve 15 is opened at a timed interval, and the liquid collected in the liquid receiving tank 5 is discharged through the L-shaped liquid outlet pipe 12, the spiral hose 13 and the drain pipe 14.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A gas chromatograph mass spectrometer water protection device comprising a conical air induction shield (1) characterised in that: The top of the conical air hood (1) is fixedly connected to an inverted U-shaped conduit (2), the bottom of one end of the inverted U-shaped conduit (2) is fixedly connected to a U-shaped liquid collection pipe (3), the top of one end of the U-shaped liquid collection pipe (3) is fixedly connected to an air duct (4), the bottom of the conical air hood (1) is provided with a liquid receiving groove (5), the bottom of the conical air hood (1) is provided with a liquid draining mechanism (7), the top surface of the inverted U-shaped conduit (2) is fixedly connected to an mounting plate (8), the top surface of the mounting plate (8) is fixedly installed with a servo motor (9), the output shaft of the servo motor (9) extends to the inner cavity of the conical air hood (1) and is fixedly connected to a liquid trough box (10), a scraper (11) is provided on one side of the liquid trough box (10), and the end face of the scraper (11) is in contact with the inner wall of the conical air hood (1).

2. A water protection device for a gas chromatograph mass spectrometer as defined in claim 1, characterized in that: The draining mechanism (7) includes an L-shaped drain pipe (12) fixedly sleeved at the bottom of the conical air hood (1). One end of the L-shaped drain pipe (12) is fixedly sleeved to the inner cavity of the liquid receiving tank (5). The other end of the L-shaped drain pipe (12) is fixedly connected to a spiral hose (13). The bottom end of the spiral hose (13) is fixedly connected to a drain pipe (14). The bottom end of the drain pipe (14) is fixedly installed with a switch valve (15).

3. The waterproof device for a gas chromatograph-mass spectrometer according to claim 1, characterized in that: The bottom end of the U-shaped liquid collecting pipe (3) is fixedly sleeved with a liquid guiding pipe (6), and the bottom end of the liquid guiding pipe (6) is fixedly sleeved into the inner cavity of the liquid receiving tank (5).

4. A water protection device for a gas chromatograph mass spectrometer as defined in claim 1, characterized in that: An air pump (17) is fixedly installed at the top of the air duct (4), and an exhaust pipe (18) is fixedly connected to the output end of the air pump (17).

5. A water protection device for a gas chromatograph mass spectrometer as defined in claim 1, wherein: The side of the inverted U-shaped conduit (2) is fixedly connected to a support column (19), and the top of the support column (19) is connected to the bottom surface of the mounting plate (8).

6. A water protection device for a gas chromatograph mass spectrometer as defined in claim 1, wherein: The inner side of the bottom end of the conical air hood (1) is provided with an inner inclined surface (16).

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