Exhaust hood of liquid chromatograph

Abstract

The utility model belongs to the technical field of exhaust hoods, and particularly relates to a liquid chromatograph exhaust hood which comprises a fixing frame, a connecting pipe fixedly mounted at the bottom of the fixing frame, an exhaust fan fixedly mounted at one end of the connecting pipe, a corrugated pipe fixedly connected to one end of the exhaust fan, a fixing seat fixedly mounted at one end of the corrugated pipe, and an exhaust hood main body arranged at the bottom of the fixing seat, a sealing ring is arranged on the exhaust hood body, a connecting seat is arranged at the top of the sealing ring, a sealing groove is formed in a fixing seat, a fixing groove is formed in the fixing seat, a groove is formed in one side of the connecting seat, a movable groove is formed in one side of the fixing groove, a fixing pin is arranged in the movable groove, and a compression spring is arranged in the movable groove. The filtering and purifying device is arranged on the mounting seat and communicated with the connecting pipe, so that discharged poisonous gas can be conveniently and effectively filtered and purified, the poisonous gas is prevented from easily polluting the external air environment, better work and use are facilitated, and the structural practicability and functionality of the air purifier can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust hoods, in particular to an exhaust hood for a liquid chromatograph. Background Art

[0002] Liquid chromatography is a type of separation and analysis technology, which is characterized by using liquid as the mobile phase. The stationary phase can be in various forms, such as paper, thin plates, and packed beds. In the development of chromatography technology, in order to distinguish various methods, their respective names were generated according to the form of the stationary phase, such as paper chromatography, thin layer chromatography, column liquid chromatography, and liquid chromatograph. Liquid chromatographs are prone to produce volatile toxic gases during the analysis of substances, so volatile toxic gases need to be absorbed by exhaust hoods.

[0003] The prior art has the following problems:

[0004] The existing liquid chromatograph exhaust hood has a relatively simple overall structure and a relatively single functionality. Although it can absorb and discharge toxic gases when in use, the discharged gases are easy to pollute the external environment, which is not convenient for better work use. At the same time, it is not convenient to quickly replace exhaust hoods of different sizes according to actual work conditions, resulting in certain limitations in work use. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a liquid chromatograph exhaust hood, which solves the problems that the existing overall structure is relatively simple and the functionality is relatively single. Although the toxic gas can be absorbed and discharged during work use, the discharged gas easily pollutes the external environment, which is not convenient for better work use. At the same time, during work use, it is not convenient to quickly replace exhaust hoods of different sizes according to actual work use conditions, resulting in relatively certain limitations in work use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid chromatograph exhaust hood, comprising a fixed frame, a connecting pipe is fixedly installed at the bottom of the fixed frame, an exhaust fan is fixedly installed at one end of the connecting pipe, a bellows is fixedly connected to one end of the exhaust fan, and a fixed seat is fixedly installed at one end of the bellows. An exhaust hood body is arranged at the bottom of the fixed seat, a sealing ring is arranged on the exhaust hood body, a connecting seat is arranged on the top of the sealing ring, a sealing groove is arranged on the fixed seat, a fixing groove is arranged inside the fixed seat, a groove is arranged on one side of the connecting seat, a movable groove is arranged on one side of the fixing groove, a fixing pin is arranged inside the movable groove, a compression spring is arranged inside the movable groove, a mounting seat is fixedly installed on the top of the fixed frame, a filtering and purifying device is arranged on the mounting seat, and an exhaust pipe is arranged on the top of the filtering and purifying device.

[0007] As a preferred technical solution of the utility model, a wire is provided inside the exhaust fan, and the exhaust fan is electrically connected to an external power supply through the wire.

[0008] As a preferred technical solution of the utility model, the outer diameter of the sealing ring is matched with the inner diameter of the sealing groove, and the sealing ring is movably plugged into the sealing groove.

[0009] As a preferred technical solution of the utility model, the outer diameter of the connecting seat is matched with the inner diameter of the fixing groove, and the connecting seat is movably plugged into the fixing groove.

[0010] As a preferred technical solution of the utility model, the outer diameter of the fixing pin is matched with the inner diameter of the groove, and the fixing pin is movably plugged into the groove.

[0011] As a preferred technical solution of the utility model, an activated carbon adsorption layer and filter cotton are arranged inside the filtering and purifying device, and the filtering and purifying device is connected with a connecting pipe.

[0012] Compared with the prior art, the utility model provides a liquid chromatograph exhaust hood, which has the following beneficial effects:

[0013] 1. The exhaust hood of a liquid chromatograph is provided with a bellows at one end of the exhaust fan to connect with the exhaust hood body, so that the telescopic angle of the exhaust hood body can be adjusted conveniently, which is convenient for better working and use, and is convenient for improving its structural practicality. By driving the exhaust fan to work, toxic gases can be conveniently discharged through the exhaust hood body, the bellows, the connecting pipe, the filtering and purification device and the exhaust pipe, and the operation and use are convenient. By providing a filtering and purification device on the mounting seat to communicate with the connecting pipe, the discharged toxic gases can be effectively filtered and purified to prevent them from easily polluting the external air environment, which is convenient for better working and use, and can effectively improve its structural practicality and functionality.

[0014] 2. The exhaust hood of a liquid chromatograph is used in combination with a fixing seat, a fixing groove, a sealing groove, a connecting seat, a sealing ring, a groove, a movable groove, a fixing pin and a compression spring. The exhaust hood body can be quickly installed and disassembled by pulling the fixing pin, and the exhaust hood body of different sizes can be conveniently replaced for work use according to actual working conditions to prevent toxic gases from leaking out easily. At the same time, it is also convenient to clean and clear it, which is convenient for better work use and can further improve the practicality and functionality of the overall device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2This is a schematic diagram of the structure of the fixing seat of the utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the exhaust hood of the utility model;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0019] In the figure: 1. fixing frame; 2. connecting pipe; 3. exhaust fan; 4. bellows; 5. fixing seat; 6. exhaust hood body; 7. sealing ring; 8. connecting seat; 9. sealing groove; 10. fixing groove; 11. groove; 12. movable groove; 13. fixing pin; 14. compression spring; 15. mounting seat; 16. filtering and purification device; 17. exhaust pipe. DETAILED DESCRIPTION

[0020] 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 in 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.

[0021] See also Figure 1-4 In the present embodiment: a liquid chromatograph exhaust hood comprises a fixing frame 1, a connecting pipe 2 is fixedly installed at the bottom of the fixing frame 1, an exhaust fan 3 is fixedly installed at one end of the connecting pipe 2, a bellows 4 is fixedly connected to one end of the exhaust fan 3, a fixing seat 5 is fixedly installed at one end of the bellows 4, an exhaust hood body 6 is arranged at the bottom of the fixing seat 5, a sealing ring 7 is arranged on the exhaust hood body 6, a connecting seat 8 is arranged on the top of the sealing ring 7, a sealing groove 9 is arranged on the fixing seat 5, a fixing groove 10 is arranged inside the fixing seat 5, a groove 11 is arranged on one side of the connecting seat 8, a movable groove 12 is arranged on one side of the fixing groove 10, a fixing pin 13 is arranged inside the movable groove 12, a compression spring 14 is arranged inside the movable groove 12, a mounting seat 15 is fixedly installed on the top of the fixing frame 1, a filtering and purifying device 16 is arranged on the mounting seat 15, and an exhaust pipe 17 is arranged on the top of the filtering and purifying device 16.

[0022] In this embodiment, a wire is provided inside the exhaust fan 3, and the exhaust fan 3 is electrically connected to an external power supply through the wire, so as to drive it to work and discharge toxic gases; the outer diameter of the sealing ring 7 is matched with the inner diameter of the sealing groove 9, and the sealing ring 7 is movably connected with the sealing groove 9, which is convenient for connection and sealing to prevent leakage; the outer diameter of the connecting seat 8 is matched with the inner diameter of the fixing groove 10, and the connecting seat 8 is movably connected with the fixing groove 10, which is convenient for connection and installation, and convenient for installation and disassembly; the outer diameter of the fixing pin 13 is matched with the inner diameter of the groove 11, and the fixing pin 13 is movably connected with the groove 11, which is convenient for connection and fixation, and improves installation stability; an activated carbon adsorption layer and filter cotton are provided inside the filtering and purification device 16, and the filtering and purification device 16 is connected with the connecting pipe 2, which is convenient for filtering and purification to prevent pollution of the air environment.

[0023] The working principle and use process of the utility model are as follows: the operator can conveniently adjust the telescopic angle of the exhaust hood body 6 by arranging a bellows 4 at one end of the exhaust fan 3 to connect with the exhaust hood body 6, so as to facilitate better work and use, and to improve its structural practicality. By driving the exhaust fan 3 to work, the toxic gas can be conveniently discharged through the exhaust hood body 6, the bellows 4, the connecting pipe 2, the filtering and purifying device 16 and the exhaust pipe 17, and the operation and use are convenient. By arranging a filtering and purifying device 16 on the mounting seat 15 to communicate with the connecting pipe 2, the discharged toxic gas can be conveniently effectively filtered and purified to prevent it from easily polluting the outside The fixed seat 5 is provided with a fixing groove 10, the connecting seat 8 is movably connected with it, and a groove 11 is provided on one side of the connecting seat 8, and a fixing pin 13 is movably connected with it. By pulling the fixing pin 13, the exhaust hood body 6 can be quickly installed and disassembled, and the exhaust hood body 6 of different sizes can be conveniently replaced for work use according to actual working conditions to prevent toxic gases from leaking out easily. At the same time, it is also convenient to clean and clean it, which is convenient for better work use, and can further improve the practicability and functionality of the overall device structure.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A liquid chromatograph exhaust hood, comprising a fixing frame (1), characterized in that: A connecting pipe (2) is fixedly mounted on the bottom of the fixing frame (1); an exhaust fan (3) is fixedly mounted on one end of the connecting pipe (2); a bellows (4) is fixedly connected to one end of the exhaust fan (3); a fixing seat (5) is fixedly mounted on one end of the bellows (4); an exhaust hood body (6) is arranged at the bottom of the fixing seat (5); a sealing ring (7) is arranged on the exhaust hood body (6); a connecting seat (8) is arranged on the top of the sealing ring (7); a sealing groove (9) is arranged on the fixing seat (5); (5) is provided with a fixed groove (10) inside, a groove (11) is provided on one side of the connecting seat (8), a movable groove (12) is provided on one side of the fixed groove (10), a fixing pin (13) is provided inside the movable groove (12), a compression spring (14) is provided inside the movable groove (12), a mounting seat (15) is fixedly mounted on the top of the fixing frame (1), a filtering and purifying device (16) is provided on the mounting seat (15), and an exhaust pipe (17) is provided on the top of the filtering and purifying device (16).

2. A liquid chromatograph exhaust hood according to claim 1, characterized in that: A conductive wire is provided inside the exhaust fan (3), and the exhaust fan (3) is electrically connected to an external power source via the conductive wire.

3. The exhaust hood for liquid chromatography according to claim 1, characterized in that: The outer diameter of the sealing ring (7) is matched to the inner diameter of the sealing groove (9), and the sealing ring (7) and the sealing groove (9) are movably plugged.

4. The exhaust hood for liquid chromatography according to claim 1, characterized in that: The outer diameter of the connection seat (8) matches the inner diameter of the fixing groove (10), and the connection seat (8) and the fixing groove (10) are movably plugged.

5. The exhaust hood for liquid chromatography according to claim 1, characterized in that: The outer diameter of the fixing pin (13) matches the inner diameter of the groove (11), and the fixing pin (13) is movably plugged into the groove (11).

6. The exhaust hood for liquid chromatography according to claim 1, characterized in that: An activated carbon adsorption layer and filter cotton are arranged inside the filtering and purifying device (16), and the filtering and purifying device (16) is connected to the connecting pipe (2).

Images