Pretreatment mechanism of trace gas analysis equipment

Abstract

The utility model belongs to the technical field of gas pretreatment mechanisms, and discloses a pretreatment mechanism of trace gas analysis equipment, which comprises a machine body, a gas inlet pipeline is arranged above the machine body, the gas outlet end of the gas inlet pipeline is connected with a treatment box, one end of the gas inlet pipeline extending into the treatment box is connected with a first conical pipeline, and the other end of the gas inlet pipeline is connected with a second conical pipeline. A first conical pipeline is arranged on the air inlet pipeline, a dust collecting bag which is easy to disassemble and assemble is arranged on the first conical pipeline, and filtering assemblies are arranged on the periphery of the outer wall of the treatment box. The shape of the first conical pipeline is gradually enlarged from the smaller diameter of the air inlet pipeline to the larger diameter of the dust collecting bag; the filtering assemblies are arranged on the periphery of the outer wall of the treatment box, so that the gas is promoted to be uniformly distributed on the surface of the dust collection bag, the gas is prevented from being concentrated in a certain local area, and the local flow velocity of the surface of the dust collection bag can be effectively reduced through uniform distribution.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas pretreatment mechanism technical field, specifically related to a trace gas analysis equipment's pretreatment mechanism. BACKGROUND

[0002] The trace gas pretreatment mechanism is used for processing and analyzing the key component of the specific gas with extremely low concentration in the atmosphere. It plays a crucial role in the trace gas analysis system, and the main function is to purify and enrich the measured gas, remove interfering substances, and ensure that the subsequent analysis instrument can accurately detect the concentration of the target gas.

[0003] In the application number 202320204348.7, a combined dryer capable of pretreating gas is disclosed, "the gas to be dried is introduced into the inlet pipe, so that the gas to be dried passes through the dust removal cloth bag, the dust removal cloth bag filters the larger solid particles in the gas to be dried, the gas to be dried passing through the dust removal cloth bag passes through the dust collection box and the air filter cotton into the first connecting pipe, the air filter cotton filters the fine solid particles in the gas to be dried, the gas to be dried passes through the first connecting pipe into the decontamination pipe and passes through the activated carbon, the activated carbon can adsorb the corrosive gas in the gas to be dried, and can preliminarily remove the water in the gas to be dried, the gas to be dried enters the second connecting pipe through the decontamination pipe, that is, the pretreatment of the gas to be dried is completed, and the drying of the gas to be dried can be started through the second connecting pipe into the drying main body", in the above-mentioned, when the gas is directly introduced into the dust removal cloth bag through the inlet pipe, the gas is easy to concentrate in a certain specific area of the cloth bag. This will cause the particulate matter load in this area to suddenly increase, and the filter material will quickly reach saturation state. This local saturation phenomenon will seriously reduce the overall filtration efficiency. Moreover, the concentration of gas in a certain area will also greatly increase the wear degree of the cloth bag in that area. Especially in the case of high flow rate or high concentration of particulate matter, the cloth bag is likely to have perforation or rupture. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a trace gas analysis equipment's pretreatment mechanism to solve the problem that the gas is easy to concentrate in the local area when it is directly introduced into the dust removal cloth bag through the inlet pipe, which leads to rapid saturation of the area, reduces the overall filtration efficiency, and intensifies the wear of the cloth bag, and even may cause the cloth bag to be perforated or ruptured.

[0005] To achieve the above object, the utility model provides following technical scheme: a kind of trace gas analysis equipment's pre-processing mechanism, comprising: body, drying main body is equipped in the body, the upper portion of the body is equipped with air inlet pipeline, the air outlet end of the air inlet pipeline is connected with processing box, box cover is installed on the processing box, and the air inlet pipeline is installed on box cover, sealing strip is equipped between the box cover and processing box, the air inlet pipeline extends to the end in processing box interior and is connected with first conical pipeline, easily detachable dust cloth bag is installed on the first conical pipeline, sealing soft pad is equipped between the first conical pipeline and dust cloth bag, the outer wall of the processing box is equipped with filter assembly around, cleaning assembly is equipped on the dust cloth bag, the main function of sealing soft pad is to form reliable sealing between the first conical pipeline and dust cloth bag, prevent gas from leaking from connecting portion, sealing soft pad is usually made of elastic material, can fill the tiny gap of connecting portion, ensure airtightness.

[0006] Preferably, the dust cloth bag is fixed with a first mounting plate, the first mounting plate is in the shape of a circular ring, the inner wall of the first conical pipeline is provided with a threaded groove, and the outer wall of the first mounting plate is provided with an external thread.

[0007] The cleaning assembly includes an elastic rope and a collection box, the elastic rope is connected between the first conical pipeline and the dust cloth bag, and the collection box is installed at the bottom end of the dust cloth bag.

[0008] Through the above technical scheme:

[0009] In use, the box cover is installed on the treatment box. The main function of the sealing strip is to form a tight seal between the box cover and the treatment box, preventing gas leakage. The sealing strip is usually made of elastic material, which can fill the small gap between the box cover and the treatment box, ensuring good airtightness. The gas inlet pipe is connected to the gas to be pretreated, and the first tapered pipe gradually expands from the smaller diameter of the gas inlet pipe to the larger diameter of the dust cloth bag. This tapered design can effectively distribute the incoming gas evenly across the entire surface of the dust cloth bag, avoiding the concentration of gas in a certain local area of the dust cloth bag, thereby preventing local blockage and uneven filtration. This uniform distribution helps to improve the overall filtration efficiency and service life of the dust cloth bag. The main function of the dust cloth bag is to filter solid particulate matter such as dust, soot, and particulate pollutants from the gas. Through physical interception and adsorption, the dust cloth bag can effectively capture and remove these particulate matters. The filter assembly is provided around the outer wall of the treatment box, so that the gas filtered by the dust cloth bag flows out from the four sides of the treatment box, which can make the gas evenly distributed on the surface of the dust cloth bag, avoiding the concentration of gas in a certain local area. This uniform distribution can effectively reduce the local flow rate on the surface of the dust cloth bag, reducing the impact and wear of the cloth bag by the gas. When the gas enters the dust cloth bag, the elastic rope pulls the dust cloth bag, causing it to vibrate continuously. This vibration causes the dust inside the bag to detach from the bag surface and fall into the collection box below. The collection box can collect dust for subsequent unified treatment. When it is necessary to disassemble the dust cloth bag, the box cover is opened, the first mounting plate is twisted, the threaded groove and the external threads are separated, and then the dust cloth bag is removed for cleaning and replacement. Rapid disassembly and replacement of the dust cloth bag can significantly reduce system downtime, improving equipment availability and production efficiency.

[0010] The filter assembly comprises a mounting pipe, a second tapered pipe, a second mounting plate and filter cotton, the mounting pipe is connected to the side wall of the treatment box, the second tapered pipe is connected to the gas inlet end of the mounting pipe, the second mounting plate is arranged on one side of the second tapered pipe, the second mounting plate and the second tapered pipe are provided with a clamping assembly and a limiting assembly, and the filter cotton is mounted on the second mounting plate. The second mounting plate is in the shape of a circular ring, and the filter cotton is mounted on the second mounting plate by adhesion.

[0011] Preferably, the clamping assembly comprises a clamping groove and a clamping block, the clamping groove is opened on the outer wall of the second tapered pipe, and the clamping block is connected to the outer wall of the second tapered pipe close to the second mounting plate.

[0012] The limiting assembly comprises a fixed cylinder, a movable rod and a limiting rod, the fixed cylinder is installed on the sidewall of the second conical pipeline, the movable rod is movably installed in the fixed cylinder, the limiting rod is installed at the end of the movable rod away from the fixed cylinder, and the limiting rod can act on the second mounting plate.

[0013] Through the above technical scheme:

[0014] In use, the gas preliminarily filtered by the dust removal bag is further filtered by the plurality of filter assemblies. The plurality of filter assemblies are evenly distributed around the processing box, which can make the gas evenly distributed after entering the processing box, avoiding the gas flowing in a certain area. This uniform distribution can ensure that the gas is in full contact with each filter assembly, improving the filtering efficiency. In this process, the filter cotton implements secondary filtration on the gas. The filter cotton usually has a finer fiber structure and can capture the tiny particulate matter remaining after preliminary filtration. This means that after two-stage filtration, the particulate matter content in the gas can be greatly reduced, thereby significantly improving the overall filtering efficiency. Subsequently, the filtered gas enters the installation pipeline through the second conical pipeline. The second conical pipeline expands the cross-sectional area of the airflow, allowing the gas to be more evenly distributed across the entire surface of the filter cotton rather than concentrated in a local area. In this way, the effective working area of the filter cotton is maximized. When it is necessary to replace the filter cotton, the movable rod is rotated, and the limiting rod is moved away from the second mounting plate. Then, the second mounting plate is pulled out, and the clamping block is disengaged from the clamping groove, so that the second mounting plate can be removed for replacement of the filter cotton thereon. After the replacement of the filter cotton is completed, the clamping groove and the clamping block are aligned, and the second mounting plate is attached to the second conical pipeline. Then, the limiting rod is rotated again, and the limiting rod acts on the second mounting plate to limit the second mounting plate, ensuring that it is not easily detached. The easily replaceable filter cotton can reduce labor and time costs, and maintenance personnel can quickly complete the operation, shorten the maintenance time, and reduce labor costs.

[0015] The gas outlet end of each of the plurality of filter assemblies is connected with a decontamination pipe, the decontamination pipe has a "wavy shape", and the decontamination pipe is filled with activated carbon packs.

[0016] Through the above technical scheme:

[0017] In use, the filtered gas enters the decontamination pipe. The decontamination pipe is in a wavy shape, which increases the surface area of the activated carbon package and provides more adsorption sites for the gas. This allows the gas to fully contact more surface of the activated carbon package during the flow through the decontamination pipe, thereby significantly improving the adsorption efficiency. Through the adsorption of the activated carbon package, the corrosive gas can be effectively removed, protecting the equipment and prolonging its service life. At the same time, the wavy shape design can effectively reduce the pressure drop of the gas flow. Compared with the straight pipe, the wavy structure reduces the flow rate of the gas by increasing the tortuosity of the flow path, reduces the resistance of the gas flow, and thereby reduces the overall pressure drop of the system.

[0018] Further, a multi-way connector is installed at the gas outlet end of the plurality of decontamination pipes, and the multi-way connector is connected with the gas guide pipe.

[0019] Specifically, the multi-way connector plays a key role in connecting the plurality of decontamination pipes in the system. Then, the gas guide pipe guides the filtered and adsorbed gas into the machine body for subsequent drying and a series of pretreatment operations.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] (1) The utility model discloses a first conical pipe and a plurality of filter assemblies are arranged, so that the gas can be uniformly distributed to the entire surface of the dust removal cloth bag. In use, the shape of the first conical pipe gradually expands from the smaller diameter of the gas inlet pipe to the larger diameter of the dust removal cloth bag, thereby effectively uniformly distributing the entering gas to the entire surface of the dust removal cloth bag. The filter assemblies are arranged around the outer wall of the treatment box, which promotes the uniform distribution of the gas on the surface of the dust removal cloth bag and avoids the concentration of the gas in a local area. Uniform distribution can effectively reduce the local flow rate of the surface of the dust removal cloth bag and reduce the impact and wear of the gas on the cloth bag.

[0022] (2) The utility model discloses a spring rope and a collection box, which are used to clean the dust in the dust removal cloth bag. In use, the airflow enters the dust removal cloth bag, and the spring rope pulls and shakes the dust removal cloth bag to make the dust separate from the surface of the cloth bag and fall into the collection box for subsequent unified treatment. This method greatly simplifies the cleaning process, reduces the workload and time of cleaning, and prolongs the service life of the dust removal cloth bag.

[0023] (3)The utility model discloses a through setting movable rod, spacing rod, clamping block and card slot etc. part, make filter cotton easy to replace, when using, rotate movable rod, movable rod drives spacing rod and removes from second mounting plate, then, draw second mounting plate, make clamping block separate from card slot to be able to conveniently take down second mounting plate to change filter cotton on it, filter cotton of easy replacement can reduce artificial and time cost, and maintenance personnel can complete operation quickly, shorten maintenance time, reduce artificial cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structural diagram of the utility model;

[0025] Figure 2 It is the structural diagram of the utility model filter assembly installation;

[0026] Figure 3 It is the structural diagram of the utility model dust cloth bag;

[0027] Figure 4 It is the structural diagram of the utility model decontamination pipe;

[0028] Figure 5 It is Figure 4 A part enlarged view in of

[0029] Figure 6 It is Figure 4 B part enlarged view in of

[0030] Figure 7 It is Figure 4 C part enlarged view in of

[0031] In the drawing: 1, machine body;2, drying main body;3, air inlet pipeline;4, processing box;5, box cover;6, sealing strip;7, first conical pipeline;8, dust cloth bag;9, first mounting plate;10, screw groove;11, external thread;12, sealing soft pad;13, installation pipeline;14, second conical pipeline;15, second mounting plate;16, filter cotton;17, card slot;18, clamping block;19, fixed cylinder;20, movable rod;21, spacing rod;22, decontamination pipe;23, activated carbon bag;24, multi-pass connector;25, air guide pipeline;26, elastic rope;27, collection box. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the protection scope of the utility model.

[0033] Please refer to Figures 1-5 The utility model provides following technical scheme: a trace gas analysis equipment's preprocessing mechanism, include: organism 1, be equipped with dry main body 2 in organism 1, the upper of organism 1 is equipped with air inlet pipeline 3, the gas outlet of air inlet pipeline 3 is connected with processing box 4, install box cover 5 on processing box 4, and air inlet pipeline 3 is installed on box cover 5, be equipped with sealing strip 6 between box cover 5 and processing box 4, the end of air inlet pipeline 3 extension to processing box 4 inside is connected with first conical pipeline 7, install easily detachable dust cloth bag 8 on first conical pipeline 7, be equipped with sealing soft pad 12 between first conical pipeline 7 and dust cloth bag 8, the periphery of the outer wall of processing box 4 is equipped with filter assembly, dust cloth bag 8 is equipped with cleaning assembly, the main function of sealing soft pad 12 is to form reliable sealing between first conical pipeline 7 and dust cloth bag 8, prevent gas from the connecting place leakage, sealing soft pad 12 usually is made of elastic material, can fill the tiny gap of connecting place, ensure airtightness.

[0034] Further, dust cloth bag 8 is fixed with first mounting plate 9, first mounting plate 9 is "circular ring shape", the inner wall of first conical pipeline 7 is provided with screw groove 10, the outer wall of first mounting plate 9 is provided with outer thread 11, screw groove 10 and outer thread 11 are adapted;

[0035] Cleaning assembly includes elastic rope 26 and collection box 27, elastic rope 26 is connected between first conical pipeline 7 and dust cloth bag 8, collection box 27 is installed at the bottom end of dust cloth bag 8.

[0036] Through the above technical scheme:

[0037] In use, the box cover 5 is installed on the treatment box 4. The main function of the sealing strip 6 is to form a tight seal between the box cover 5 and the treatment box 4, preventing gas leakage. The sealing strip 6 is usually made of elastic material, which can fill the small gap between the box cover 5 and the treatment box 4, ensuring good airtightness. The gas inlet pipe 3 is connected to the gas to be pretreated, and the first tapered pipe 7 gradually expands from the smaller diameter of the gas inlet pipe 3 to the larger diameter of the dust cloth bag 8. This tapered design can effectively distribute the incoming gas evenly to the entire surface of the dust cloth bag 8, avoiding the concentration of gas in a certain local area of the dust cloth bag 8, thereby preventing local blockage and uneven filtration. This uniform distribution helps to improve the overall filtration efficiency and service life of the dust cloth bag 8. The main function of the dust cloth bag 8 is to filter solid particles such as dust, soot, and particulate pollutants from the gas. Through physical interception and adsorption, the dust cloth bag 8 can effectively capture and remove these particulate matters. The treatment box 4 is provided with a filter assembly around the outer wall, so that the gas filtered by the dust cloth bag 8 flows out from the four sides of the treatment box 4, which can make the gas evenly distributed on the surface of the dust cloth bag 8, avoiding the concentration of gas in a certain local area. This uniform distribution can effectively reduce the local flow rate on the surface of the dust cloth bag 8, reducing the impact and wear of the gas on the bag. When the gas enters the dust cloth bag 8, the elastic rope 26 pulls the dust cloth bag 8, causing it to vibrate continuously. This vibration causes the dust inside the dust cloth bag 8 to detach from the bag surface and fall into the collection box 27 below. The collection box 27 can collect dust for subsequent unified treatment. When it is necessary to disassemble the dust cloth bag 8, open the box cover 5, rotate the first mounting plate 9, separate the threaded groove 10 and the external thread 11, and then remove the dust cloth bag 8 for cleaning and replacement. The quick disassembly and replacement of the dust cloth bag 8 can significantly reduce system downtime, improve equipment availability and production efficiency.

[0038] Please refer to Figures 1-6 As shown, the filter assembly includes a mounting pipe 13, a second tapered pipe 14, a second mounting plate 15, and filter cotton 16. The mounting pipe 13 is connected to the side wall of the treatment box 4, the second tapered pipe 14 is connected to the gas inlet end of the mounting pipe 13, the second mounting plate 15 is arranged on one side of the second tapered pipe 14, the second mounting plate 15 and the second tapered pipe 14 are provided with a clamping assembly and a limiting assembly, and the filter cotton 16 is installed on the second mounting plate 15. The second mounting plate 15 is in the shape of a "ring", and the filter cotton 16 can be installed on the second mounting plate 15 by pasting.

[0039] Further, the clamping assembly includes a clamping groove 17 and a clamping block 18. The clamping groove 17 is opened on the outer wall of the second tapered pipe 14, and the clamping block 18 is connected to the outer wall of the second mounting plate 15 close to the second tapered pipe 14. The clamping groove 17 and the clamping block 18 are adapted to each other.

[0040] The limiting assembly comprises a fixed cylinder 19, a movable rod 20 and a limiting rod 21. The fixed cylinder 19 is installed on the sidewall of the second conical duct 14. The movable rod 20 is movably installed in the fixed cylinder 19. The limiting rod 21 is installed at the end of the movable rod 20 away from the fixed cylinder 19, and the limiting rod 21 can act on the second mounting plate 15.

[0041] Through the above technical scheme:

[0042] In use, the gas preliminarily filtered by the dust removal cloth bag 8 is further filtered by the plurality of filter assemblies. The plurality of filter assemblies are evenly distributed around the processing box 4, so that the gas is evenly distributed after entering the processing box 4, avoiding the gas flowing in a certain area. This uniform distribution can ensure that the gas is in full contact with each filter assembly, improving the filtering efficiency. In this process, the filter cotton 16 implements secondary filtering on the gas. The filter cotton 16 usually has a finer fiber structure and can capture the small particulate matter remaining after preliminary filtering. This means that the particulate matter content in the gas can be greatly reduced after two-stage filtering, thereby significantly improving the overall filtering efficiency. Subsequently, the filtered gas enters the mounting duct 13 through the second conical duct 14. The second conical duct 14 expands the cross-sectional area of the airflow, so that the gas can be more evenly distributed on the entire surface of the filter cotton 16, rather than concentrated in a local area. In this way, the effective working area of the filter cotton 16 is maximized. When it is necessary to replace the filter cotton 16, the movable rod 20 is rotated, and the limiting rod 21 is moved away from the second mounting plate 15. Then, the second mounting plate 15 is pulled out, so that the clamping block 18 is disengaged from the clamping groove 17, thereby enabling the second mounting plate 15 to be removed for replacement of the filter cotton 16 thereon. After the replacement of the filter cotton 16 is completed, the clamping groove 17 and the clamping block 18 are aligned, and the second mounting plate 15 is attached to the second conical duct 14. Then, the limiting rod 21 is rotated again to act on the second mounting plate 15 to limit the second mounting plate 15, ensuring that it is not easily detached. The easily replaceable filter cotton 16 can reduce labor and time costs, and maintenance personnel can quickly complete the operation, shorten the maintenance time, and reduce labor costs.

[0043] Please refer to Figures 1-7 As shown in the figure, the gas outlet end of each filter assembly is connected with a decontamination pipe 22, which is in a "wavy shape". The decontamination pipe 22 is filled with activated carbon bags 23.

[0044] Through the above technical scheme:

[0045] In use, the filtered gas enters the decontamination tube 22. The decontamination tube 22 is in a wavy shape, which increases the surface area of the activated carbon package 23 and provides more adsorption sites for the gas. This allows the gas to be in full contact with more surface of the activated carbon package 23 when flowing through the decontamination tube 22, thereby significantly improving the adsorption efficiency. Through the adsorption of the activated carbon package 23, the corrosive gas can be effectively removed, protecting the equipment and prolonging its service life. At the same time, the wavy shape design can effectively reduce the pressure drop of the gas flow. Compared with a straight pipeline, the wavy structure reduces the flow rate of the gas by increasing the tortuosity of the flow path, reduces the resistance of the gas flow, and thereby reduces the overall pressure drop of the system.

[0046] Further, please refer to Figure 1 As shown, the gas outlet end of the plurality of decontamination tubes 22 is provided with a multi-way connector 24, and the multi-way connector 24 is connected with the gas guide pipe 25 between the machine body 1.

[0047] Specifically, the multi-way connector 24 plays a key role in connecting the plurality of decontamination tubes 22 in the system. Subsequently, the gas guide pipe 25 guides the filtered and adsorbed gas into the machine body 1 for subsequent drying and a series of pretreatment operations.

[0048] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pretreatment mechanism of a trace gas analysis apparatus, characterized by comprising: Include: The body (1) is provided with a drying main body (2), the upper part of the body (1) is provided with an air inlet pipeline (3), the air outlet end of the air inlet pipeline (3) is connected with a treatment box (4), the treatment box (4) is provided with a box cover (5), and the air inlet pipeline (3) is installed on the box cover (5), the box cover (5) and the treatment box (4) are provided with a sealing strip (6), one end of the air inlet pipeline (3) extending to the inside of the treatment box (4) is connected with a first conical pipeline (7), the first conical pipeline (7) is provided with a detachable dust cloth bag (8), the first conical pipeline (7) and the dust cloth bag (8) are provided with a sealing soft pad (12), the outer wall of the treatment box (4) is provided with a filter assembly, and the dust cloth bag (8) is provided with a cleaning assembly.

2. A pre-processing mechanism of a trace gas analysis apparatus according to claim 1, characterized in that: The dust cloth bag (8) is fixedly provided with a first mounting plate (9), the first mounting plate (9) is in the shape of a circular ring, the inner wall of the first conical pipeline (7) is provided with a threaded groove (10), and the outer wall of the first mounting plate (9) is provided with an external thread (11), the threaded groove (10) and the external thread (11) are matched.

3. The pre-treatment mechanism of a trace gas analysis apparatus according to claim 1, characterized in that: The filter assembly comprises a mounting pipeline (13), a second conical pipeline (14), a second mounting plate (15) and filter cotton (16), the mounting pipeline (13) is connected to the side wall of the treatment box (4), the second conical pipeline (14) is connected to the air inlet end of the mounting pipeline (13), the second mounting plate (15) is arranged on one side of the second conical pipeline (14), the second mounting plate (15) and the second conical pipeline (14) are provided with a clamping assembly and a limiting assembly, and the filter cotton (16) is mounted on the second mounting plate (15).

4. A pre-treatment mechanism for a trace gas analysis apparatus according to claim 3, characterised in that: The clamping assembly comprises a clamping groove (17) and a clamping block (18), the clamping groove (17) is formed in the outer wall of the second conical pipeline (14), the clamping block (18) is connected to the outer wall of the second mounting plate (15) close to the second conical pipeline (14), and the clamping groove (17) and the clamping block (18) are matched.

5. The pre-treatment mechanism of a trace gas analysis apparatus according to claim 3, characterized by: The limiting assembly comprises a fixed cylinder (19), a movable rod (20) and a limiting rod (21), the fixed cylinder (19) is mounted on the side wall of the second conical pipeline (14), the movable rod (20) is movably mounted in the fixed cylinder (19), the limiting rod (21) is mounted at one end of the movable rod (20) away from the fixed cylinder (19), and the limiting rod (21) can act on the second mounting plate (15).

6. The pre-treatment mechanism of a trace gas analysis apparatus according to claim 3, characterized by: The air outlet ends of a plurality of filter assemblies are connected with a decontamination pipe (22), the decontamination pipe (22) is in the shape of a wave, and the decontamination pipe (22) is filled with an activated carbon bag (23).

7. A pre-treatment mechanism for a trace gas analysis apparatus according to claim 6, characterised in that: The air outlet ends of a plurality of decontamination pipes (22) are provided with a multi-way connector (24), and a gas guide pipeline (25) is connected between the multi-way connector (24) and the body (1).

8. The pre-treatment mechanism of a trace gas analysis apparatus according to claim 1, characterized by: The cleaning assembly comprises an elastic rope (26) connected between the first conical pipeline (7) and the dust removal cloth bag (8), and a collecting box (27) installed at the bottom end of the dust removal cloth bag (8).

Images