Filtering device for gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographic instruments, in particular to a filtering device for a gas chromatographic instrument, which comprises a gas chromatographic instrument body, a cylinder is arranged at the top of the gas chromatographic instrument body, a plate sleeve is welded on the outer side of the cylinder, an insertion plate is sleeved in the plate sleeve, a filter screen is mounted in the insertion plate through a mounting frame, and the filter screen is connected with the gas chromatographic instrument body. A brushing assembly is arranged at one end of the barrel; and the brushing assembly comprises a second circular frame fixed in the cylinder through a bolt, a sleeve is arranged in the second circular frame in a penetrating and sleeving mode, a connecting rod is arranged in the sleeve in a penetrating and sleeving mode through a bearing, and an impeller is fixed to the top end of the connecting rod through a flat key. Through the insertion type design, the insertion plate is inserted into the cylinder from the plate sleeve, the filter screen is mounted in the cylinder, mounting and dismounting are convenient, the filter screen is convenient to replace, the impeller can drive the wiping brush to rotate through the connecting rod, the filter screen is brushed, and the filter efficiency is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a filtering device for gas chromatographs. Background Art

[0002] Gas chromatograph is an instrument that uses chromatographic separation and detection technology to perform qualitative and quantitative analysis on complex mixtures of multiple components. It can usually be used to analyze organic matter in the soil that is thermally stable and has a boiling point not exceeding 500°C, such as volatile organic compounds, organochlorine, organophosphorus, polycyclic aromatic hydrocarbons, phthalates, etc.

[0003] Patent announcement No. CN220386071U discloses a filtering device of a gas chromatograph, including a gas chromatograph body and an injection port, wherein an air suction pump is connected to the top of the injection port through a conduit, and a filtering mechanism for filtering impurities in the sample is provided at the air inlet pipe end of the suction pump; the filtering mechanism includes a filter cartridge detachably connected to the upper surface of the gas chromatograph body, an injection tube is provided at the top of the filter cartridge, and two symmetrically arranged filter plates are provided in the filter cartridge, the two filter plates are distributed up and down, and the filter aperture of the filter plate close to the injection port is smaller than the filter plate above it; the filtering mechanism also includes a cleaning component for cleaning the filter material inside the filter cartridge and a disassembly component for disassembling and assembling the filter plate, which solves the problem that when using a brush to brush the sediment on the filter plate, the hard texture of the brush bristles easily causes scratches and scrapes on the surface of the filter plate, thereby reducing the filtering effect and service life of the filter plate.

[0004] The shortcomings of the existing gas chromatograph filtering device are that the filter plate is fixedly installed and is not easy to disassemble and replace, and the filter plate cannot be cleaned. The filtered dust, impurities, etc. will accumulate on the filter plate, thereby affecting the filtering efficiency of the filter plate. Therefore, a filtering device for a gas chromatograph is proposed. The plug-in design facilitates the installation and disassembly of the filter screen, and the filter screen can be cleaned by a rotating wiping brush to avoid affecting its filtering efficiency. Utility Model Content

[0005] In view of the problems in the prior art, the utility model provides a filtering device for a gas chromatograph, which facilitates the installation and removal of the filter screen through a plug-in design, and the filter screen can be cleaned by a rotating wiping brush to avoid affecting its filtering efficiency.

[0006] The technical solution adopted by the utility model to solve the technical problem is a filtering device for a gas chromatograph, comprising a gas chromatograph body, a cylinder body is arranged on the top of the gas chromatograph body, a plate sleeve is welded on the outside of the cylinder body, a plug plate is sleeved inside the plate sleeve, a filter screen is installed inside the plug plate through a mounting frame, and a cleaning brush assembly is arranged at one end of the cylinder body;

[0007] The cleaning brush assembly includes a second circular frame fixed to the inside of the cylinder by bolts, a sleeve is inserted into the inside of the second circular frame, a connecting rod is inserted into the inside of the sleeve through a bearing, an impeller is fixed to the top of the connecting rod by a flat key, a layer plate is fixed to the bottom of the connecting rod by bolts, and a wiping brush is fixed to the bottom of the layer plate by bolts.

[0008] By adopting the above technical solution, the impeller drives the layer plate and the wiping brush at the bottom thereof to rotate through the connecting rod, so as to wipe the top of the filter screen to prevent dust, impurities, etc. from affecting the filtering efficiency of the filter screen, and the plug plate is inserted into the cylinder through the plate sleeve to facilitate the installation and disassembly of the filter screen.

[0009] Specifically, the bottom end of the cylinder is connected with a connecting pipe through a threaded groove, and the bottom end of the connecting pipe is connected to the gas inlet end of the gas chromatograph body through a pipeline joint.

[0010] Specifically, a one-way valve is sleeved on the outer side of the connecting pipe, and an air inlet pipe is welded on the top of the cylinder.

[0011] Specifically, a reserved groove corresponding to the plug plate is opened inside the cylinder, and a sleeve cover corresponding to the plate sleeve is fixed to one end of the plug plate by bolts.

[0012] Specifically, a suction assembly is arranged inside the cylinder at the bottom of the second circular frame, and the suction assembly includes a first circular frame fixed inside the cylinder by bolts.

[0013] Specifically, a driving motor is installed inside the first circular frame through a mounting frame, and an exhaust fan blade is fixed to the output shaft at the top of the driving motor through a flat key.

[0014] Beneficial effects of the utility model:

[0015] (1) The utility model discloses a filtering device for a gas chromatograph. When a gas sample enters the cylinder through an air inlet pipe, the impeller is driven to rotate. The impeller drives the layer plate to rotate through a connecting rod. The layer plate rotates to wipe the top of the filter screen through a wiping brush at the bottom thereof. Dust, impurities, etc. accumulated on the filter screen can be cleaned up to prevent dust, impurities, etc. from clogging the mesh of the filter screen, thereby affecting the filtering efficiency of the filter screen.

[0016] (2) The utility model discloses a filtering device for a gas chromatograph, wherein the plug-in plate is inserted into the cylinder from the plate sleeve, so that the filter screen enters the cylinder, and a gas sample can be filtered. When the plug-in plate is fully inserted into the cylinder, the sleeve cover is tightly attached to one side of the plate sleeve to seal the plate sleeve. After the plug-in plate is pulled out of the plate sleeve, the filter screen can be taken out. The installation and disassembly are convenient, and the filter screen can be easily replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a diagram of the cylinder and the plugboard of the utility model;

[0020] Figure 3 It is a cross-sectional view of the cylinder and the inserting plate of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the cleaning and brushing assembly of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the suction assembly of the utility model;

[0023] In the figure: 1. Gas chromatograph body; 2. Cylinder; 3. Plate sleeve; 4. Suction assembly; 401. First circular frame; 402. Drive motor; 403. Exhaust fan blades; 5. Cleaning brush assembly; 501. Second circular frame; 502. Casing; 503. Connecting rod; 504. Impeller; 505. Shelf; 506. Wiping brush; 6. Connecting pipe; 7. Insert plate; 8. Filter; 9. Cover; 10. Inlet pipe; 11. Reserved slot; 12. One-way valve. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] The plug-in design makes it easy to install and remove the filter, and the filter can be cleaned by the rotating wiping brush to avoid affecting its filtering efficiency. Figure 1-5 As shown, the utility model is a filtering device for a gas chromatograph, comprising a gas chromatograph body 1, a cylinder 2 is arranged on the top of the gas chromatograph body 1, a plate sleeve 3 is welded on the outside of the cylinder 2, a plug plate 7 is sleeved inside the plate sleeve 3, a filter screen 8 is installed inside the plug plate 7 through a mounting frame, and a cleaning brush assembly 5 is arranged at one end of the cylinder 2;

[0026] The cleaning brush assembly 5 includes a second circular frame 501 fixed to the inside of the cylinder 2 by bolts, a sleeve 502 is inserted through the inside of the second circular frame 501, a connecting rod 503 is inserted through the inside of the sleeve 502 via a bearing, an impeller 504 is fixed to the top of the connecting rod 503 by a flat key, a layer plate 505 is fixed to the bottom of the connecting rod 503 by bolts, and a wiping brush 506 is fixed to the bottom of the layer plate 505 by bolts.

[0027] When in use, the impeller 504 drives the layer plate 505 and the wiping brush 506 at the bottom thereof to rotate through the connecting rod 503, so as to wipe the top of the filter screen 8 to prevent dust, impurities, etc. from affecting the filtering efficiency of the filter screen 8, and the plug plate 7 is inserted into the cylinder 2 through the plate sleeve 3, so as to facilitate the installation and disassembly of the filter screen 8.

[0028] For example, Figure 2 As shown, the utility model also includes that the bottom end of the cylinder 2 is connected to a connecting pipe 6 through a threaded groove, and the bottom end of the connecting pipe 6 is connected to the gas inlet end of the gas chromatograph body 1 through a pipeline joint.

[0029] When in use, the gas filtered in the cylinder 2 enters the gas chromatograph body 1 through the connecting pipe 6 .

[0030] For example, Figure 2 As shown, the utility model also includes that a one-way valve 12 is sleeved on the outer side of the connecting pipe 6 , and an air intake pipe 10 is welded to the top end of the cylinder 2 .

[0031] When in use, the one-way valve 12 can prevent the gas entering the gas chromatograph body 1 from flowing back, and the provision of the air inlet pipe 10 facilitates the extraction of gas samples into the cylinder 2 .

[0032] For example, Figure 3 As shown, the utility model also includes that a reserved groove 11 corresponding to the plug plate 7 is opened on the inner side of the cylinder 2, and a sleeve cover 9 corresponding to the plate sleeve 3 is fixed to one end of the plug plate 7 by bolts.

[0033] When in use, when the inserting plate 7 is inserted into the cylinder 2, its edge enters the reserved groove 11, which can improve the stability of the inserting plate 7 and prevent it from being skewed. The cover 9 is used to seal the plate cover 3 to prevent air leakage.

[0034] For example, Figure 5 As shown, the utility model further includes that a suction assembly 4 is arranged inside the cylinder 2 at the bottom of the second circular frame 501, and the suction assembly 4 includes a first circular frame 401 fixed inside the cylinder 2 by bolts.

[0035] When in use, the first circular frame 401 is used to support the driving motor 402 .

[0036] For example, Figure 5 As shown, the utility model also includes that a driving motor 402 is installed inside the first circular frame 401 through a mounting frame, and an exhaust fan blade 403 is fixed to the top output shaft of the driving motor 402 through a flat key.

[0037] When in use, the driving motor 402 drives the exhaust fan blades 403 to rotate, so that the gas sample can be drawn into the cylinder 2.

[0038] When the utility model is used, a person uses a power cord to connect the device to an external power source, turns on the driving motor 402 to drive the exhaust fan blades 403 to rotate at a high speed, and can draw a gas sample into the cylinder 2 through the air inlet pipe 10. After the gas sample entering the cylinder 2 is filtered by the filter screen 8, it flows from the connecting pipe 6 to the gas chromatograph body 1. The one-way valve 12 can prevent the gas sample entering the gas chromatograph body 1 from flowing back;

[0039] The plug plate 7 is inserted into the cylinder 2 from the plate sleeve 3, so that the filter screen 8 enters the cylinder 2, and a gas sample can be filtered. When the plug plate 7 is fully inserted into the cylinder 2, the cover 9 is tightly attached to one side of the plate sleeve 3 to seal the plate sleeve 3. After the plug plate 7 is pulled out from the plate sleeve 3, the filter screen 8 can be taken out. It is easy to install and disassemble, and it is convenient to replace the filter screen 8.

[0040] When the gas sample enters the cylinder 2 through the air inlet pipe 10, it drives the impeller 504 to rotate, and the impeller 504 drives the layer plate 505 to rotate through the connecting rod 503. The layer plate 505 rotates to wipe the top of the filter screen 8 through the wiping brush 506 at the bottom, so as to clean up the dust, impurities and the like accumulated on the filter screen 8, so as to prevent the dust, impurities and the like from clogging the mesh of the filter screen 8, thereby affecting the filtering efficiency of the filter screen 8.

[0041] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A filter device for gas chromatograph, characterized in that: The gas chromatograph comprises a gas chromatograph body (1), wherein a cylinder (2) is arranged on the top of the gas chromatograph body (1), a plate sleeve (3) is welded on the outside of the cylinder (2), a plug plate (7) is sleeved inside the plate sleeve (3), a filter screen (8) is installed inside the plug plate (7) via a mounting frame, and a cleaning brush assembly (5) is arranged at one end of the cylinder (2); The cleaning brush assembly (5) comprises a second circular frame (501) fixed to the inside of the cylinder (2) by bolts, a sleeve (502) is inserted through the inside of the second circular frame (501), a connecting rod (503) is inserted through the inside of the sleeve (502) by a bearing, an impeller (504) is fixed to the top of the connecting rod (503) by a flat key, a layer plate (505) is fixed to the bottom of the connecting rod (503) by bolts, and a wiping brush (506) is fixed to the bottom of the layer plate (505) by bolts.

2. A gas chromatograph filter device according to claim 1, characterized in that: The bottom end of the cylinder (2) is connected to a connecting pipe (6) via a threaded groove, and the bottom end of the connecting pipe (6) is connected to the gas inlet end of the gas chromatograph body (1) via a pipe joint.

3. A gas chromatograph filter device according to claim 2, characterized in that: A one-way valve (12) is sleeved on the outside of the connecting pipe (6), and an air inlet pipe (10) is welded to the top end of the cylinder (2).

4. A gas chromatograph filter device according to claim 1, characterized in that: A reserved groove (11) corresponding to the plug plate (7) is provided on the inner side of the cylinder (2), and a sleeve cover (9) corresponding to the plate sleeve (3) is fixed to one end of the plug plate (7) by means of bolts.

5. A gas chromatograph filter device according to claim 1, characterized in that: A suction assembly (4) is arranged inside the cylinder (2) at the bottom of the second circular frame (501), and the suction assembly (4) comprises a first circular frame (401) fixed inside the cylinder (2) by bolts.

6. A gas chromatograph filter device according to claim 5, characterized in that: A driving motor (402) is installed inside the first circular frame (401) through a mounting frame, and an exhaust fan blade (403) is fixed to the top output shaft of the driving motor (402) through a flat key.

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