Waste gas absorption device for liquid chromatograph

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas absorption device for a liquid chromatograph, which comprises a treatment box filled with a neutralizer, the treatment box is communicated with a gas inlet pipe and two gas outlet pipes, the gas outlet end of the gas inlet pipe sinks into the neutralizer, and the gas inlet ends of the gas outlet pipes are positioned above the liquid level of the neutralizer; a filter screen and an activated carbon plate are sequentially arranged in the air outlet pipe in the air outlet direction, and a blocking unit for controlling the air outlet end of the air outlet pipe to be opened and closed is arranged on the air outlet pipe. A dust collection unit is arranged on the air outlet pipe in a sliding and penetrating manner, can slide on the filtering surface of the filter screen and is used for sucking impurities on the filtering surface of the filter screen; the activated carbon plate penetrates through the air outlet pipe in a sliding mode, a material preparation shell and a locking unit used for locking and fixing the activated carbon plate in the air outlet pipe are arranged on the air outlet pipe, and the activated carbon plate used for replacement penetrates through the material preparation shell in a sliding mode. The waste gas treatment device has the beneficial effect that waste gas treatment can be continuously carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a waste gas absorption device for a liquid chromatograph. Background Art

[0002] Liquid chromatography tandem mass spectrometer, the excellent sensitivity of its mass spectrometry system can ensure the minimum detection limit of ultra-trace substances, with high performance and reliability standards. It is mainly used in the field of life sciences, from basic research to drug discovery and development, functional medicine, food safety and environmental analysis of pesticide residues, as well as forensic toxicology, trace analysis of clinical research, food testing, environmental analysis, toxicology testing and drug metabolomics and other projects for quantitative and qualitative research. Liquid chromatography tandem mass spectrometer can detect multiple biomarkers in one injection, and has gradually become a recommended method for the detection of biochemical small molecule markers. When the liquid chromatography tandem mass spectrometer is in use, it will produce waste gas, which contains substances that are harmful to the human body. The waste gas of the liquid chromatography tandem mass spectrometer needs to be filtered and discharged to the outside through a pipe.

[0003] Through searching, Chinese patent announcement number CN212483470U discloses a tail gas treatment device for high performance liquid chromatograph, including a chromatograph body, one side of the chromatograph body is connected to an exhaust pipe, one end of the exhaust pipe is connected to an exhaust pump, the air outlet of the exhaust pump is connected to an exhaust pipe, one end of the exhaust pipe is connected to a treatment box, a filter screen is provided inside the treatment box, an activated carbon layer is provided on the top of the filter screen, and an exhaust hole is provided on one side of the treatment box. When treating the waste gas, the neutralizer in the liquid storage tank is discharged into the treatment box through the liquid outlet pipe, and then the waste gas in the chromatograph body is sucked into the treatment box by the exhaust pump, so that the waste gas reacts chemically with the neutralizer and is neutralized. The neutralized gas is then adsorbed by the activated carbon layer and discharged from the exhaust hole. The neutralized waste liquid is discharged from the treatment box by the liquid discharge pipe. The structure is simple, the operation is convenient, and the efficiency of treating the waste gas is improved.

[0004] With respect to the above-mentioned related technologies, the inventors of the utility model discovered the following defects: after a period of use, the filter net and the activated carbon layer need to be manually cleaned of impurities attached to the filter net and the activated carbon in the activated carbon layer needs to be replaced; during the process of cleaning the filter net and replacing the activated carbon, the treatment device must suspend the treatment of the exhaust gas, affecting the continuity of the exhaust gas treatment, and therefore needs to be improved. Utility Model Content

[0005] In order to solve the above problems, the embodiment of the utility model provides a waste gas absorption device for a liquid chromatograph, so that the waste gas treatment can be carried out continuously.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: an exhaust gas absorption device for a liquid chromatograph, comprising a treatment box containing a neutralizer, an air inlet pipe and two air outlet pipes connected to the treatment box, the air outlet end of the air inlet pipe is sunk into the neutralizer, and the air inlet end of the air outlet pipe is located above the liquid level of the neutralizer;

[0007] The air outlet pipe is provided with a filter screen and an activated carbon plate arranged in sequence along the air outlet direction, and the air outlet pipe is provided with a blocking unit for controlling the opening and closing of the air outlet end of the air outlet pipe;

[0008] A dust suction unit is slidably provided on the air outlet pipe, and the dust suction unit can slide on the filter surface of the filter and be used to suck out impurities on the filter surface of the filter;

[0009] An activated carbon plate is slidably inserted into the air outlet pipe, and a preparation shell and a locking unit for locking and fixing the activated carbon plate in the air outlet pipe are provided on the air outlet pipe. A replaceable activated carbon plate is slidably inserted into the preparation shell, and the activated carbon plate located in the preparation shell can be slidably inserted into the air outlet pipe and push out the activated carbon plate originally in the air outlet pipe.

[0010] Optionally, the dust suction unit includes a motor, a reciprocating screw, a sliding frame, a vacuum cleaner and two dust hoods. The motor and the vacuum cleaner are installed on the air outlet pipe. The output shaft of the motor is coaxially connected to the reciprocating screw. The reciprocating screw rotates around its own axis and is connected to the air outlet pipe and is threadedly engaged with the sliding frame. The air outlet pipe is provided with a penetration groove for the sliding frame to slide through. The sliding frame seals the penetration groove. The vacuum cleaner is connected to the two dust hoods through the dust suction pipe. The two dust hoods are installed on the sliding frame and are respectively arranged on the front and back sides of the filter.

[0011] Optionally, it further includes a conductive unit, which includes a power supply, a mounting seat, a power supply block and a conductive block, the power supply is connected to the power supply block through a wire, the mounting seat is connected to the air outlet pipe through a spring, the power supply block is mounted on the mounting seat, and the conductive block is mounted on the air outlet pipe and connected to the motor and the vacuum cleaner through a wire;

[0012] The activated carbon plate located in the air outlet pipe will push the mounting seat to move when it is separated from the air outlet pipe, so that the power supply block contacts the conductive block. At this time, the power supply will supply power to the motor and the vacuum cleaner through the power supply block and the conductive block.

[0013] When the activated carbon plate in the air outlet pipe is separated from the air outlet pipe, the activated carbon plate will be separated from the mounting seat, and the spring will return to a natural state, so that the mounting seat drives the power supply block to be separated from the conductive block.

[0014] Optionally, the locking unit includes a vertically arranged rotating shaft, the rotating shaft rotates around its own axis and is connected to the air outlet pipe, and a clamping rod is installed on the rotating shaft;

[0015] The activated carbon plate is slidably arranged in the vertical direction through the air outlet pipe and the inner side of the material preparation shell, and a clamping groove for the clamping rod to be rotatably embedded is arranged on the activated carbon plate.

[0016] Optionally, the blocking unit includes a blocking plate, which is connected to the air outlet pipe through a vertically arranged elastic telescopic rod, and when the elastic telescopic rod is in a natural state, the blocking plate will be sealed at the air outlet end of the air outlet pipe;

[0017] A slide bar is installed on the blocking plate, and a slide groove is provided on the rotating shaft for the slide bar to slide and embed;

[0018] A slider is provided on the slide rod, and a threaded groove for the slider to slide and embed is provided on the groove wall of the slide groove;

[0019] When the gas output of the outlet pipe is reduced to the point where the elastic telescopic rod prompts the sealing plate to close the outlet end of the outlet pipe, the sealing plate will drive the sliding rod to slide in the sliding groove during movement, and the sliding rod will slide in the threaded groove through the sliding block, so that the rotating shaft drives the clamping rod to disengage from the clamping groove.

[0020] Optionally, the material preparation shell is located directly above the air outlet pipe, and when the rotating shaft drives the clamping rod to disengage from the clamping slot, the activated carbon plate in the material preparation shell will slide down due to its own gravity, so that the activated carbon plate in the air outlet pipe is pushed out;

[0021] A support plate is installed on the air outlet pipe. When the activated carbon plate in the preparation shell pushes out the activated carbon plate in the air outlet pipe, the activated carbon plate pushed out of the air outlet pipe will abut against the upper surface of the support plate.

[0022] Optionally, when the activated carbon plate in the air outlet pipe is pushed out, the sliding frame has completed a cycle of movement, and the dust hood will be separated from the filtering surface of the filter screen and sink into the penetration groove.

[0023] Optionally, when the dust hood is sucking away impurities on the filter screen, the sliding frame can block the filter holes on the filter screen between the dust hood and the penetration groove.

[0024] Optionally, a liquid inlet pump and a liquid outlet pipe are installed on the processing box, the liquid inlet pump is connected to the interior of the processing box through the liquid inlet pipe, the liquid outlet pipe is connected to the interior of the processing box, and a solenoid valve is installed on the liquid outlet pipe.

[0025] Optionally, a check valve is installed in the air intake pipe.

[0026] The beneficial effects of the embodiments of the utility model are:

[0027] 1. When the filter is blocked to a certain extent, the gas output of the outlet pipe will not be enough to keep the elastic telescopic rod in a deformed state. At this time, the elastic telescopic rod will return to its natural state, so that the blocking plate is sealed at the outlet end of the outlet pipe. The outlet pipe can no longer discharge exhaust gas, so that workers can clean the filter in the outlet pipe and replace the activated carbon plate, while the other outlet pipe will continue to process the exhaust gas;

[0028] 2. The motor can drive the reciprocating screw to rotate, and the reciprocating screw can drive the sliding frame to do linear reciprocating motion, and the sliding frame will drive the dust cover to move synchronously; the vacuum cleaner will remove impurities on the front and back sides of the filter and impurities blocked inside the filter through the dust suction pipe and the dust suction hood, realizing the comprehensive cleaning of the filter to ensure the filtering effect and efficiency of the filter on the exhaust gas;

[0029] 3. The activated carbon plate in the preparation shell can be slidably inserted into the exhaust pipe and the activated carbon plate originally in the exhaust pipe can be pushed out, so that the activated carbon plate can be quickly replaced and the exhaust gas in the exhaust pipe cannot escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the embodiment of the present application;

[0032] Figure 3 is a schematic cross-sectional view of the air outlet pipe in an embodiment of the present application;

[0033] Figure 4 is a schematic structural diagram of a dust collection unit in an embodiment of the present application;

[0034] Figure 5 is a schematic diagram of the structure of the locking unit and the activated carbon plate in the embodiment of the present application;

[0035] Figure 6 is a schematic structural diagram of a locking unit in an embodiment of the present application;

[0036] Figure 7 Schematic diagram of the structure of the gas outlet pipe and the activated carbon plate in the embodiment of the present application;

[0037] Figure 8 yes Figure 7 A local enlarged schematic diagram of point A in the middle.

[0038] 1. Processing box; 11. Liquid inlet pump; 12. Liquid inlet pipe; 13. Liquid outlet pipe; 14. Solenoid valve; 2. Air inlet pipe; 21. Check valve; 3. Air outlet pipe; 31. Wearing groove; 32. Material preparation shell; 33. Support plate; 4. Sealing unit; 41. Sealing plate; 42. Elastic telescopic rod; 43. Sliding rod; 44. Sliding block; 5. Dust suction unit; 51. Motor; 52. Reciprocating screw rod; 53. Sliding frame; 54. Vacuum cleaner; 55. Dust suction pipe; 56. Dust hood; 6. Locking unit; 61. Rotating shaft; 62. Clamping rod; 63. Slide groove; 64. Spiral groove; 7. Conductive unit; 71. Power supply; 72. Mounting seat; 73. Spring; 74. Power supply block; 75. Conductive block; 8. Filter; 9. Activated carbon plate; 91. Clamping groove; 92. Notch. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0040] See also Figure 1-8 The utility model embodiment discloses a waste gas absorption device for a liquid chromatograph. Figure 1 and Figure 2 As shown, a waste gas absorption device for a liquid chromatograph includes a treatment box 1 containing a neutralizer, the lower part of the treatment box 1 is connected to an air inlet pipe 2, the left and right sides of the upper part of the treatment box 1 are connected to air outlet pipes 3, the air outlet end of the air inlet pipe 2 is sunk into the neutralizer, and the air inlet end of the air outlet pipe 3 is located above the liquid level of the neutralizer, so that the waste gas entering into the treatment box 1 from the air inlet pipe 2 can be neutralized by the neutralizer in the treatment box 1.

[0041] The exhaust pipe 3 is provided with a filter 8 and an activated carbon plate 9 which are arranged in sequence along the exhaust direction. The filter 8 can filter impurities in the neutralized exhaust gas, and the activated carbon plate 9 can adsorb tiny particles in the filtered exhaust gas. The treated exhaust gas will be discharged through the exhaust pipe 3.

[0042] A check valve 21 is installed in the air intake pipe 2 to prevent the neutralizer from flowing back into the air intake pipe 2 .

[0043] The processing box 1 is equipped with a liquid inlet pump 11 and a liquid outlet pipe 13. The liquid inlet pump 11 is connected to the interior of the processing box 1 through the liquid inlet pipe 12. The liquid outlet pipe 13 is connected to the interior of the processing box 1, and a solenoid valve 14 is installed on the liquid outlet pipe 13 to facilitate the replacement of the neutralizer in the processing box 1.

[0044] like Figure 3As shown, a blocking unit 4 for controlling the opening and closing of the outlet end of the outlet pipe 3 is provided on the outlet pipe 3. The blocking unit 4 includes a blocking plate 41. The blocking plate 41 is connected to the outlet pipe 3 through a vertically arranged elastic telescopic rod 42.

[0045] When there are not many impurities attached to the filter 8, the exhaust gas will pass through the filter 8 normally, and the gas output of the outlet pipe 3 will cause the blocking plate 41 to separate from the outlet end of the outlet pipe 3 to facilitate the discharge of the exhaust gas. At this time, the elastic telescopic rod 42 will be in a deformed state.

[0046] When the filter 8 is blocked to a certain extent, the gas outlet of the outlet pipe 3 will be insufficient to keep the elastic telescopic rod 42 in a deformed state. At this time, the elastic telescopic rod 42 will return to its natural state, so that the sealing plate 41 is closed at the outlet end of the outlet pipe 3. The outlet pipe 3 cannot continue to discharge exhaust gas, so that workers can clean the filter 8 in the outlet pipe 3 and replace the activated carbon plate 9, while the other outlet pipe 3 will continue to process the exhaust gas.

[0047] like Figure 3 and Figure 4 As shown, a dust collection unit 5 is slidably penetrated on the air outlet pipe 3, and the dust collection unit 5 includes a motor 51, a reciprocating screw rod 52, a sliding frame 53, a dust collector 54 and two dust hoods 56. The motor 51 and the dust collector 54 are installed on the air outlet pipe 3, and the output shaft of the motor 51 is coaxially connected to the reciprocating screw rod 52. The reciprocating screw rod 52 rotates around its own axis and is connected to the air outlet pipe 3 and is threadedly engaged with the sliding frame 53. The air outlet pipe 3 is provided with a penetration groove 31 for the sliding frame 53 to slide through. The dust collector 54 is connected to two dust hoods 56 through a dust collection pipe 55. The two dust hoods 56 are both installed on the sliding frame 53 and are respectively arranged on the front and back sides of the filter 8.

[0048] The motor 51 can drive the reciprocating screw 52 to rotate, and the reciprocating screw 52 can drive the sliding frame 53 to perform linear reciprocating motion, and the sliding frame 53 will drive the dust hood 56 to move synchronously; the vacuum cleaner 54 will remove impurities on the front and rear sides of the filter 8 and impurities blocked inside the filter 8 through the dust suction pipe 55 and the dust suction hood 56, thereby achieving a comprehensive cleaning of the filter 8 to ensure the filtering effect and filtering efficiency of the filter 8 on the exhaust gas.

[0049] It is worth noting that the sliding frame 53 will always seal the penetration groove 31, so that the exhaust gas in the exhaust pipe 3 cannot be discharged through the penetration groove 31, thereby ensuring the treatment effect of the exhaust gas.

[0050] like Figure 5As shown, the activated carbon plate 9 is slidably inserted into the air outlet pipe 3, and a preparation shell 32 is provided on the air outlet pipe 3. An activated carbon plate 9 for replacement is slidably inserted into the preparation shell 32. The activated carbon plate 9 located in the preparation shell 32 can be slidably inserted into the air outlet pipe 3 and the activated carbon plate 9 originally in the air outlet pipe 3 can be pushed out, thereby realizing the rapid replacement of the activated carbon plate 9 and preventing the exhaust gas in the air outlet pipe 3 from escaping.

[0051] like Figure 3 and Figure 5 As shown, the air outlet pipe 3 is provided with a locking unit 6, which includes a vertically arranged rotating shaft 61, which rotates around its own axis and is connected to the air outlet pipe 3, and a clamping rod 62 is installed on the rotating shaft 61; the activated carbon plate 9 is slidably arranged in the air outlet pipe 3 and the inner side of the material preparation shell 32 in the vertical direction, and the activated carbon plate 9 is provided with a clamping groove 91 for the clamping rod 62 to be rotatably embedded. Through the rotation of the rotating shaft 61, the clamping rod 62 can be rotated and embedded in the clamping groove 91, so that the activated carbon plate 9 located in the air outlet pipe 3 is locked and fixed, so as to ensure the stability of the activated carbon plate 9 during the exhaust gas treatment.

[0052] like Figure 5 and Figure 6 As shown, a sliding rod 43 is installed on the blocking plate 41, and a sliding groove 63 is provided on the rotating shaft 61 for the sliding rod 43 to slide and embed; a sliding block 44 is provided on the sliding rod 43, and a threaded groove is provided on the groove wall of the sliding groove 63 for the sliding block 44 to slide and embed; the material preparation shell 32 is located directly above the air outlet pipe 3, and a support plate 33 for the activated carbon plate 9 to descend and resist is installed on the air outlet pipe 3.

[0053] When the gas output of the outlet pipe 3 is reduced to the point where the elastic telescopic rod 42 prompts the sealing plate 41 to be closed at the outlet end of the outlet pipe 3, the sealing plate 41 will drive the sliding rod 43 to slide in the sliding groove 63 during the movement, and the sliding rod 43 will slide in the threaded groove through the sliding block 44 so that the rotating shaft 61 drives the clamping rod 62 to disengage from the clamping groove 91. At this time, the activated carbon plate 9 located in the preparation shell 32 will slide down due to its own gravity, so that the activated carbon plate 9 located in the outlet pipe 3 is pushed out and contacts the upper surface of the support plate 33, thereby realizing the automatic replacement of the activated carbon plate 9 and ensuring the stability of the activated carbon plate 9 after replacement.

[0054] like Figure 7 and Figure 8 As shown, it also includes a conductive unit 7, which includes a power supply 71, a mounting seat 72, a power supply block 74 and a conductive block 75. The power supply 71 is connected to the power supply block 74 through a wire, the mounting seat 72 is connected to the air outlet pipe 3 through a spring 73, the power supply block 74 is installed on the mounting seat 72, and the conductive block 75 is installed on the air outlet pipe 3 and connected to the motor 51 and the vacuum cleaner 54 through a wire.

[0055] The activated carbon plate 9 located in the air outlet pipe 3 will push the mounting seat 72 to move during the process of detaching from the air outlet pipe 3, so that the power supply block 74 will contact the conductive block 75. At this time, the power supply 71 will supply power to the motor 51 and the vacuum cleaner 54 through the power supply block 74 and the conductive block 75. The motor 51 will drive the sliding frame 53 and the dust hood 56 to move through the reciprocating screw 52. The dust hood 56 will absorb impurities on the filter 8 through the dust pipe 55 and the dust hood 56.

[0056] When the activated carbon plate 9 located in the air outlet pipe 3 is separated from the air outlet pipe 3, the notch 92 on the activated carbon plate 9 will correspond to the mounting seat 72, so that the activated carbon plate 9 is separated from the mounting seat 72, and the spring 73 will return to the natural state, so that the mounting seat 72 drives the power supply block 74 to separate from the conductive block 75. At this time, the motor 51 and the dust hood 56 will be powered off, and the sliding frame 53 has completed a cycle of motion. The dust hood 56 will be separated from the filtering surface of the filter screen 8 and sink into the penetration groove 31, that is, the impurities on the filter screen 8 have been completely cleaned.

[0057] It is worth mentioning that, in the process of the dust hood 56 sucking away impurities on the filter 8, the sliding frame 53 can block the filter holes on the filter 8 located between the dust hood 56 and the penetration groove 31, thereby controlling the gas output of the air outlet pipe 3 to prevent the air outlet pipe 3 from returning to a normal gas output during the cleaning process of the filter 8, that is, it is ensured that the sealing plate 41 can stably block the air outlet end of the air outlet pipe 3, and the sealing plate 41 will not cause the clamping rod 62 to contact the activated carbon plate 9 during the movement, so that the activated carbon plate 9 can slide down stably and cause the power supply block 74 to contact the conductive block 75 for a specified time, so as to ensure that the dust hood 56 can just complete the comprehensive cleaning of the filter 8.

[0058] The working principle of the utility model is as follows: during the treatment of exhaust gas, the exhaust gas will enter the treatment box 1 through the air inlet pipe 2, the neutralizer will neutralize the exhaust gas, the filter screen 8 will filter the impurities in the neutralized exhaust gas, the activated carbon plate 9 will adsorb the tiny particles in the filtered exhaust gas, and the exhaust gas after multiple treatments will be discharged through the exhaust pipe 3.

[0059] When there are more impurities attached to the filter 8 in one of the outlet pipes 3, the air outlet volume of the outlet pipe 3 will be insufficient to keep the elastic telescopic rod 42 in a deformed state, the elastic telescopic rod 42 on the outlet pipe 3 will return to a natural state, so that the blocking plate 41 is sealed at the outlet end of the outlet pipe 3, and the outlet pipe 3 cannot continue to discharge exhaust gas, so that workers can clean the filter 8 in the outlet pipe 3 and replace the activated carbon plate 9, while the other outlet pipe 3 will continue to treat the exhaust gas, thereby ensuring the continuous treatment of the exhaust gas.

[0060] When the blocking plate 41 blocks the air outlet pipe 3, it will drive the slide bar 43 to slide in the slide groove 63. The slide bar 43 will slide in the threaded groove through the slider 44 so that the rotating shaft 61 will drive the clamping rod 62 to disengage from the clamping groove 91. At this time, the activated carbon plate 9 located in the preparation shell 32 will slide down into the air outlet pipe 3 due to its own gravity, and the activated carbon plate 9 originally in the air outlet pipe 3 will be pushed out, thereby realizing the automatic replacement of the activated carbon plate 9.

[0061] When the activated carbon plate 9 is pushed out of the air outlet pipe 3, it will push the mounting seat 72 to move, so that the power supply block 74 will contact the conductive block 75. At this time, the power supply 71 will supply power to the motor 51 and the vacuum cleaner 54 through the power supply block 74 and the conductive block 75. The motor 51 will drive the sliding frame 53 and the dust hood 56 to move through the reciprocating screw 52. The dust hood 56 will absorb impurities on the filter 8 through the dust pipe 55 and the dust hood 56.

[0062] When the activated carbon plate 9 located in the air outlet pipe 3 is separated from the air outlet pipe 3, the activated carbon plate 9 will abut against the upper surface of the support plate 33, so that the activated carbon plate 9 in the air outlet pipe 3 remains stable, and the spring 73 will return to a natural state, so that the mounting seat 72 drives the power supply block 74 to separate from the conductive block 75. At this time, the motor 51 and the dust hood 56 will be powered off, and the sliding frame 53 has completed a cycle of motion. The dust hood 56 will be separated from the filtering surface of the filter screen 8 and sink into the penetration groove 31, that is, the impurities on the filter screen 8 have been completely cleaned.

[0063] After that, the exhaust gas can pass through the cleaned filter 8 normally. The gas output of the outlet pipe 3 will cause the sealing plate 41 to be lifted up so that the outlet pipe 3 can continue to process the exhaust gas. During the lifting process, the sealing plate 41 will drive the slide bar 43 to slide in the slide groove 63. The slide bar 43 will slide the slider 44 in the spiral groove 64 to rotate and reset the rotating shaft 61. The rotating shaft 61 will drive the clamping rod 62 to be clamped into the clamping groove 91 of the activated carbon plate 9 to ensure the stability of the activated carbon plate 9 during the exhaust gas cleaning process. At this time, the worker can remove the activated carbon plate 9 on the support plate 33.

[0064] In summary, the present application can automatically and timely complete the cleaning of the filter 8 and the replacement of the activated carbon plate 9, thereby ensuring the continuous treatment of the exhaust gas and reducing the labor intensity of the workers.

[0065] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0066] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0067] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0068] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An exhaust gas absorption device for a liquid chromatograph, characterized in that: The invention comprises a treatment box (1) containing a neutralizing agent, wherein the treatment box (1) is connected with an air inlet pipe (2) and two air outlet pipes (3), the air outlet end of the air inlet pipe (2) is sunk into the neutralizing agent, and the air inlet end of the air outlet pipe (3) is located above the liquid level of the neutralizing agent; The air outlet pipe (3) is provided with a filter screen (8) and an activated carbon plate (9) arranged in sequence along the air outlet direction, and the air outlet pipe (3) is provided with a blocking unit (4) for controlling the opening and closing of the air outlet end of the air outlet pipe (3); A dust suction unit (5) is slidably provided on the air outlet pipe (3), and the dust suction unit (5) can slide on the filtering surface of the filter screen (8) and is used to remove impurities on the filtering surface of the filter screen (8); The activated carbon plate (9) is slidably inserted into the air outlet pipe (3), and the air outlet pipe (3) is provided with a preparation shell (32) and a locking unit (6) for locking and fixing the activated carbon plate (9) in the air outlet pipe (3). The preparation shell (32) is slidably inserted with an activated carbon plate (9) for replacement. The activated carbon plate (9) in the preparation shell (32) can be slidably inserted into the air outlet pipe (3) and the activated carbon plate (9) originally in the air outlet pipe (3) can be pushed out.

2. The exhaust gas absorption device for liquid chromatograph according to claim 1, characterized in that: The dust collecting unit (5) comprises a motor (51), a reciprocating screw rod (52), a sliding frame (53), a dust collector (54) and two dust collecting hoods (56). The motor (51) and the dust collector (54) are mounted on the air outlet pipe (3). The output shaft of the motor (51) is coaxially connected to the reciprocating screw rod (52). The reciprocating screw rod (52) rotates around its own axis and is connected to the air outlet pipe (3) and is threadedly engaged with the sliding frame (53). The air outlet pipe (3) is provided with a penetration groove (31) for the sliding frame (53) to slide through. The sliding frame (53) seals the penetration groove (31). The dust collector (54) is connected to the two dust collecting hoods (56) through the dust collecting pipe (55). The two dust collecting hoods (56) are both mounted on the sliding frame (53) and are respectively arranged on the front and rear sides of the filter screen (8).

3. The exhaust gas absorption device for liquid chromatograph according to claim 2, characterized in that: The device also comprises a conductive unit (7), the conductive unit (7) comprising a power supply (71), a mounting seat (72), a power supply block (74) and a conductive block (75), the power supply (71) being connected to the power supply block (74) via a wire, the mounting seat (72) being connected to the air outlet pipe (3) via a spring (73), the power supply block (74) being mounted on the mounting seat (72), and the conductive block (75) being mounted on the air outlet pipe (3) and connected to the motor (51) and the vacuum cleaner (54) via a wire; The activated carbon plate (9) located in the air outlet pipe (3) will push the mounting seat (72) to move when it is separated from the air outlet pipe (3), so that the power supply block (74) will contact the conductive block (75). At this time, the power supply (71) will supply power to the motor (51) and the vacuum cleaner (54) through the power supply block (74) and the conductive block (75); When the activated carbon plate (9) located in the air outlet pipe (3) is separated from the air outlet pipe (3), the activated carbon plate (9) will be separated from the mounting seat (72), and the spring (73) will return to a natural state, so that the mounting seat (72) drives the power supply block (74) to be separated from the conductive block (75).

4. The exhaust gas absorption device for liquid chromatograph according to claim 3, characterized in that: The locking unit (6) comprises a vertically arranged rotating shaft (61), the rotating shaft (61) is rotatable around its own axis and connected to the air outlet pipe (3), and a clamping rod (62) is installed on the rotating shaft (61); The activated carbon plate (9) is slidably arranged in a vertical direction through the air outlet pipe (3) and the inner side of the material preparation shell (32), and a clamping groove (91) for the clamping rod (62) to be rotatably embedded is provided on the activated carbon plate (9).

5. The exhaust gas absorption device for liquid chromatograph according to claim 4, characterized in that: The blocking unit (4) comprises a blocking plate (41), which is connected to the air outlet pipe (3) via a vertically arranged elastic telescopic rod (42); when the elastic telescopic rod (42) is in a natural state, the blocking plate (41) will seal the air outlet end of the air outlet pipe (3); A slide bar (43) is installed on the blocking plate (41), and a slide groove (63) for the slide bar (43) to slide and embed is provided on the rotating shaft (61); A slider (44) is provided on the slide rod (43), and a threaded groove for the slider (44) to slide and embed is provided on the groove wall of the slide groove (63); When the gas output of the gas outlet pipe (3) is reduced to the point where the elastic telescopic rod (42) prompts the blocking plate (41) to close the gas outlet end of the gas outlet pipe (3), the blocking plate (41) will drive the sliding rod (43) to slide in the sliding groove (63) during the movement, and the sliding rod (43) will slide in the threaded groove through the sliding block (44) so ​​that the rotating shaft (61) drives the clamping rod (62) to disengage from the clamping groove (91).

6. The exhaust gas absorption device for liquid chromatograph according to claim 5, characterized in that: The material preparation shell (32) is located directly above the air outlet pipe (3). When the rotating shaft (61) drives the clamping rod (62) to disengage from the clamping groove (91), the activated carbon plate (9) in the material preparation shell (32) will slide down due to its own gravity, so that the activated carbon plate (9) in the air outlet pipe (3) is pushed out. A support plate (33) is installed on the air outlet pipe (3). When the activated carbon plate (9) in the preparation shell (32) pushes the activated carbon plate (9) in the air outlet pipe (3), the activated carbon plate (9) pushed out of the air outlet pipe (3) will abut against the upper surface of the support plate (33).

7. The exhaust gas absorption device for liquid chromatograph according to claim 6, characterized in that: When the activated carbon plate (9) located in the air outlet pipe (3) is pushed out, the sliding frame (53) has completed a cycle of movement, and the dust cover (56) will be separated from the filtering surface of the filter screen (8) and sink into the penetration groove (31).

8. The exhaust gas absorption device for liquid chromatograph according to claim 7, characterized in that: When the dust cover (56) sucks away impurities on the filter screen (8), the sliding frame (53) can block the filter holes on the filter screen (8) between the dust cover (56) and the penetration groove (31).

9. The exhaust gas absorption device for liquid chromatograph according to claim 1, characterized in that: The processing box (1) is equipped with a liquid inlet pump (11) and a liquid outlet pipe (13); the liquid inlet pump (11) is connected to the interior of the processing box (1) through the liquid inlet pipe (12); the liquid outlet pipe (13) is connected to the interior of the processing box (1); and a solenoid valve (14) is installed on the liquid outlet pipe (13).

10. The exhaust gas absorption device for liquid chromatograph according to claim 1, characterized in that: A check valve (21) is installed in the air intake pipe (2).

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