A high-sensitivity detection device based on gas phase ion mobility spectrometry

Abstract

The present application relates to the technical fields of gas phase ion mobility spectrometry application, and mainly relates to a high-sensitivity detection device based on gas phase ion mobility spectrometry, which comprises a detection device body, an air inlet component arranged on one side of the detection device body, a filter cartridge fixed on one side of the detection device body, an insertion tube fixed in the filter cartridge, a gas guide component installed in the insertion tube, a rotating ring rotatably sleeved on the outside of the insertion tube, a partition plate fixed on the outside of the rotating ring, a filter part installed on the rotating ring, a movable insertion part installed on the insertion tube and connected with the filter part, and the movable insertion part being in communication with the air inlet component and the gas guide component. The filter device of the conventional instrument is optimized, a plurality of filter parts are arranged on the outside of the rotating ring, and the movable insertion part is used for docking, so that when a single filter part is replaced due to overload filtering, the single filter part can be conveniently disassembled without stopping the instrument, and the detection efficiency is improved when a large number of products are detected.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of gas phase ion mobility spectrometry application, in particular to a high-sensitivity detection device based on gas phase ion mobility spectrometry. BACKGROUND

[0002] Gas chromatography-ion mobility spectrometry (GC-IMS) is one of the new technologies for detecting volatile components developed in recent years, and the application range of the GC-IMS in the analysis of food volatile components is gradually expanded.

[0003] During the transportation, storage and processing of aquatic products, the quality of the aquatic products is easily deteriorated due to the influence of external environment and self factors (microorganisms, endogenous enzymes, etc.), because the characteristic indexes of different varieties of aquatic products change differently. Aquatic products and related products have strong aroma characteristics, and the aroma components change significantly as the freshness decreases, so the GC-IMS is suitable for online monitoring of aquatic products and related products.

[0004] When detecting gas input, the filter equipment needs to be replaced and cleaned frequently to reduce impurities in the gas into the equipment system, and the detection time is increased. SUMMARY

[0005] The purpose of the application is to provide a high-sensitivity detection device based on gas phase ion mobility spectrometry to solve the problem of replacing and cleaning the filter equipment for batch detection.

[0006] To achieve the above purpose, the application provides the following technical scheme: a high-sensitivity detection device based on gas phase ion mobility spectrometry, comprising a detection equipment body, a gas inlet component is arranged on one side of the detection equipment body, a filter cartridge is fixed on one side of the detection equipment body, a plug-in pipe is fixed in the filter cartridge, a gas guide component is installed in the plug-in pipe, a rotating ring is rotatably connected to the outside of the plug-in pipe, a baffle is fixed on the outside of the rotating ring, a filter part is installed on the rotating ring, a movable plug-in part is installed on the plug-in pipe and is connected to the filter part, the movable plug-in part is in communication with the gas inlet component and the gas guide component, and a shielding plate is arranged on the filter cartridge, an opening is formed in the filter cartridge, and the shielding plate is slidably installed in the opening.

[0007] Preferably, the air guide component comprises an air guide pipe fixed on the inner wall of the installation pipe, an air outlet pipe is fixed at the bottom end of the installation pipe, the other end is connected with the movable insertion part, an air inlet pipe is fixed in the installation pipe, the outer end of the filter cartridge is fixed with a carrier gas pipe which is connected with the air inlet component, and the air inlet pipe is connected with the carrier gas pipe.

[0008] Preferably, the outer end of the air inlet pipe and the air outlet pipe is a tapered structure.

[0009] Preferably, the filter part and the abutting part of the rotating ring are provided with magnetic blocks, both ends of the filter part are fixed with air pipes, and the air pipes are connected with the movable insertion part.

[0010] Preferably, the movable insertion part comprises a fixed plate fixed on both ends of the installation pipe, a first insertion pipe is slidingly inserted into the fixed plate, one end of the first insertion pipe is connected with the air pipe, the outer side of the first insertion pipe is fixed with an end plate, the outer side of the first insertion pipe is sleeved with a reset spring abutting against the end plate and the fixed plate, one outer end of the first insertion pipe is fixedly connected with the air guide pipe, and the other outer end of the first insertion pipe is fixedly connected with a hose connected with the air inlet component.

[0011] Preferably, the adjusting part comprises an adjusting column fixed on the end plate, a limiting pipe is fixed on the first insertion pipe, the limiting pipe slidingly abuts against the fixed plate, an adjusting arc plate is fixed on the inner wall of the shielding plate and abuts against the adjusting column, and the side close to the adjusting column of the adjusting arc plate is an arc surface structure.

[0012] Preferably, both ends of the rotating ring are fixed with end rings, and notches are formed in the end rings corresponding to the positions of the air pipes.

[0013] Preferably, the outer side of the shielding plate is fixed with an abutting plate, and the outer wall of the filter cartridge is fixed with a magnetic plate magnetically attracted to the abutting plate.

[0014] Preferably, the partition plate is provided with insertion columns, one of the insertion columns is inserted with an adjusting rod, and the adjacent surfaces of the shielding plate and the filter cartridge are provided with grooves matched with the adjusting rod.

[0015] Preferably, the outer side of the shielding plate is fixed with a pinching plate.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The present application optimizes the traditional filter equipment of the instrument, and by placing multiple filter parts on the outer side of the rotating ring and connecting with the movable insertion part, when a single filter part is replaced due to overload, the filter part can be conveniently disassembled without stopping the instrument, thereby improving the detection efficiency when detecting a large number of products.

[0018] The adjusting member designed on the inner side of the shielding plate can be in mutual butt joint with the movable insertion part, so that the person only needs to open the shielding plate to open the movable insertion part in linkage, and the filter part is more convenient to replace. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the present application;

[0020] Figure 2 It is another angle structure schematic view of the whole of the present application;

[0021] Figure 3 It is a partial sectional side view of the present application;

[0022] Figure 4 It is a partial sectional internal structure schematic view of the filter cartridge of the present application;

[0023] Figure 5 It is Figure 4 It is an enlarged view of A in the middle;

[0024] Figure 6 It is a filter barrel structure schematic view of the present application after removing the shielding plate;

[0025] Figure 7 It is a schematic view of the position relationship between the rotating ring and the filter part of the present application;

[0026] Figure 8 It is a main view of the butt joint between the movable insertion part and the air pipe of the present application.

[0027] In the figure: 1, detection equipment body; 2, air inlet part; 3, filter cartridge; 4, insertion pipe; 5, air guide part; 6, rotating ring; 7, partition plate; 8, filter part; 9, movable insertion part; 10, shielding plate; 11, opening; 12, adjusting member; 13, air guide pipe; 14, air outlet insertion pipe; 15, air inlet insertion pipe; 16, carrier gas pipe; 17, air pipe; 18, fixed plate; 19, first insertion pipe; 20, end plate; 21, return spring; 22, hose; 23, adjusting column; 24, limiting pipe; 25, adjusting arc plate; 26, end ring; 27, notch; 28, fitting plate; 29, magnetic attraction plate; 30, insertion column; 31, adjusting rod; 32, pinch plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Embodiment one: please refer to Figure 1 Figure 4 And Figure 7 , one of the high sensitivity detection device based on gas phase ion mobility spectrometry in the illustration, the detection device body 1 is provided with the gas inlet component 2 on one side, further comprising a filter cartridge 3 fixed on one side of the detection device body 1, the filter cartridge 3 is fixed with an insertion tube 4, the insertion tube 4 is installed with a gas guide component 5; and the rotating ring 6 is sleeved on the outside of the insertion tube 4, the rotating ring 6 is fixed with the partition plate 7, the partition plate 7 is preferably four, and is distributed at equal angles on the outside of the rotating ring 6, the rotating ring 6 is installed with the filter part 8, the number of filter part 8 is four, and is installed between the four partition plates 7 in turn, the insertion tube 4 is installed with the live plug part 9 which is butt jointed with the filter part 8, the live plug part 9 is communicated with the gas inlet component 2 and the gas guide component 5; and the baffle plate 10, the opening 11 is formed on the filter cartridge 3, the baffle plate 10 is slidingly installed at the opening 11, the inner side of the baffle plate 10 is installed with the adjusting part 12 for adjusting the live plug part 9;

[0030] In the scheme, the shape of the filter part 8 is a fan-shaped frame structure, which is filled with filter material, the filter part 8 is communicated with the gas inlet component 2 and the gas guide component 5 through the live plug part 9, the gas to be detected needs to be filtered through the filter part 8 when entering the gas inlet component 2, after the overload of the filter part 8, the personnel opens the baffle plate 10, dismounts the overload filter part 8, and butt joints another filter part 8 with the live plug part 9, so as to satisfy the influence of the filter part 8 replacement when detecting multiple products.

[0031] It should be noted that: in order to improve the closing effect of the baffle plate 10 and facilitate the operation of the baffle plate 10, the matching plate 28 is fixed on the outside of the baffle plate 10, the magnetic plate 29 is fixed on the outer wall of the filter cartridge 3 and is magnetically attracted with the matching plate 28, and the pinch plate 32 is fixed on the outside of the baffle plate 10.

[0032] Further, referring to Figure 3 Figure 6 The gas guide component 5 includes a gas guide pipe 13 fixed on the inner wall of the insertion tube 4, the gas guide pipe 13 is fixed with an air outlet plug 14 at the bottom end of the insertion tube 4, the other end is butt jointed with the live plug part 9, the insertion tube 4 is fixed with an air inlet plug 15, the outer end of the air outlet plug 14 and the air inlet plug 15 is a tapered structure, the tapered structure can effectively break the rubber cap of the collection bottle, so as to be inserted into the collection bottle and collect the internal gas.

[0033] In order to facilitate the entry of the gas to be detected, the outer end of the air inlet plug 15 and the air outlet plug 14 is a tapered structure, the design of the tapered structure can effectively break the rubber cap of the collection bottle, so as to be inserted into the collection bottle and collect the internal gas.

[0034] In the scheme, the step of inhaling the gas to be detected is: ​​

[0035] First, the personnel will be equipped with a collection bottle of the gas to be detected directly inserted into the insertion tube 4, and the rubber cap at one end of the collection bottle will be inserted into the gas inlet tube 15 and the gas outlet tube 14;

[0036] Second, the carrier gas tube 16 is injected with nitrogen, which is blown out through the gas inlet tube 15, and the gas to be detected in the collection bottle is squeezed into the gas outlet tube 14, and finally enters the filter part 8 through the gas guide tube 13 and the movable insertion part 9, and then enters the gas inlet part 2 after filtering.

[0037] In this scheme, the insertion length of the gas inlet tube 15 into the collection bottle is longer than that of the gas outlet tube 14. After being inserted into the collection bottle, the gas inlet tube 15 is at the bottom of the collection bottle, and the gas outlet tube 14 is at the mouth of the collection bottle. After nitrogen is injected, the gas in the collection bottle can be effectively discharged from the bottle mouth, thereby effectively injecting the gas to be measured.

[0038] Further, referring to Figure 1 , Figure 3 and Figure 8 , in order to facilitate the installation and disassembly of the filter part 8, a magnetic block is arranged at the joint of the filter part 8 and the rotating ring 6. After the fan-shaped filter part 8 is attached to the outer wall of the rotating ring 6, it is limited by the partition plate 7, so that the installation can be stable and fast. At the same time, the two ends of the filter part 8 are fixed with air pipes 17, which are connected with the movable insertion part 9;

[0039] Among them, in order to improve the installation stability and installation accuracy of the filter part 8, end rings 26 are fixed at both ends of the rotating ring 6. The end rings 26 are provided with notches 27 corresponding to the positions of the air pipes 17. The designed end rings 26 and notches 27 can quickly position the filter part 8 by connecting with the air pipes 17, thereby improving the installation accuracy of the filter part 8.

[0040] Further, referring to Figure 4 and Figure 5 , the movable insertion part 9 includes a fixed plate 18 fixed at both ends of the insertion tube 4. A first insertion tube 19 is slidably inserted into the fixed plate 18. One end of the first insertion tube 19 is connected with the air pipe 17. An end plate 20 is fixed to the outside of the first insertion tube 19. A return spring 21 is sleeved with the end plate 20 and the fixed plate 18. One end of the first insertion tube 19 is fixedly connected with the gas guide tube 13. The other end of the first insertion tube 19 is fixedly connected with a hose 22 connected with the gas inlet part 2. The movable adjustment of the first insertion tube 19 in the movable insertion part 9 satisfies the connection and disassembly of the first insertion tube 19 and the air pipe 17, thereby facilitating the replacement of the filter part 8.

[0041] At the same time, referring to Figure 4 and Figure 5The adjusting member 12 comprises an adjusting column 23 fixed on the end plate 20, a limiting tube 24 fixed on the first insertion pipe 19, the limiting tube 24 being in sliding abutment with the fixed plate 18, and an adjusting arc plate 25 fixed on the inner wall of the shielding plate 10 and in abutment with the adjusting column 23, the adjusting arc plate 25 being arc-shaped on the side close to the adjusting column 23;

[0042] It should be noted that when the shielding plate 10 is opened, the adjusting arc plate 25 is moved, the arc surface of the adjusting arc plate 25 presses the adjusting column 23, so that the end plate 20 and the first insertion pipe 19 move outward and are separated from the air pipe 17, thereby realizing the opening of the live insertion part 9. When the shielding plate 10 is closed, the adjusting arc plate 25 is retracted, and the first insertion pipe 19 is moved again under the pressing of the return spring 21 until it is inserted into the air pipe 17, thereby realizing the connection.

[0043] In the scheme, the specific process of replacing the overload filter part 8 comprises the following steps:

[0044] In the first step, after a certain amount of gas to be detected is inhaled, the personnel start to replace the filter part 8, the equipment is stopped first, and then the shielding plate 10 is opened;

[0045] In the second step, the shielding plate 10 is slid along the opening 10, so that the shielding plate 10 drives the corresponding sliding of the adjusting arc plate 25 when it is opened, thereby driving the corresponding movement of the adjusting column 23 and the corresponding retraction of the first insertion pipe 19, so as to separate from the air pipe 17;

[0046] In the third step, the personnel hold the filter part 8 to remove the filter part 8;

[0047] In the fourth step, the rotating ring 6 is rotated by 90°, so that the other filter part 8 is moved to the position corresponding to the live insertion part 9;

[0048] In the fifth step, the shielding plate 10 is closed, and the live insertion part 9 is connected to the new filter part 8 under the action of the return spring 21.

[0049] In the scheme, when a large number of products are detected, the rotation of the plurality of filter parts 8 can meet the rapid replacement of one filter part 8 after overload, without stopping for a long time, thereby improving the efficiency of the detection line. After a batch of products are detected, the personnel can reinstall the four filter parts 8 to cope with the detection of the next batch of products.

[0050] Embodiment Two: Please refer to Figure 6 and Embodiment Two: Please refer to Figure 7 The embodiment further illustrates Embodiment One, and the difference lies in that the structure of the partition plate 7 is optimized to facilitate the rotation of the rotating ring 6 when the personnel replace the filter part 8.

[0051] Specifically, the partition plate 7 is provided with a plurality of insertion columns 30, one of the insertion columns 30 is inserted with an adjusting rod 31, and the adjacent surface of the shielding plate 10 and the filter cylinder 3 is provided with a groove matched with the adjusting rod 31.

[0052] In the scheme, when the filter part 8 is replaced, the personnel only need to take down the adjusting rod 31, then insert it into the upward insertion column 30, and then rotate the rotating ring 6 by pulling down the adjusting rod 31, so that the new filter part 8 can be rotated to the live insertion part 9, and then moved to the groove, which can accurately limit the filter part 8 at the live insertion part 9 docking position, improve the docking accuracy and facilitate the rotation of the rotating ring 6.

[0053] Working principle: when detecting the to-be-detected gas, the personnel first place the to-be-detected product in the collection bottle, one end of the collection bottle is sealed with a rubber cap, and in the detection process, the personnel inserts the collection bottle into the insertion pipe 4, the rubber cap is directly inserted with the gas inlet pipe 15 and the gas outlet pipe 14, the sharp end of the gas inlet pipe 15 and the gas outlet pipe 14 is inserted into the collection bottle, at this time, nitrogen is injected through the carrier gas pipe 16, enters the collection bottle through the gas inlet pipe 15, pushes the gas in the collection bottle into the gas outlet pipe 14, and enters the live insertion part 9 through the gas guide pipe 13, enters the filter part 8 through the air pipe 17, filters the impurities in the gas through the filter part 8, and finally enters the hose 22 through the live insertion part 9, and is transmitted to the gas inlet part 2, and the gas is transmitted to the detection equipment body 1, and the to-be-detected product is detected by gas phase ion mobility spectrum with high sensitivity;

[0054] After continuously detecting a plurality of products in the above manner, the filter part 8 will be overloaded due to too many filtering times, at this time, the filter part 8 needs to be replaced, when replacing, the personnel first opens the shielding plate 10, when the shielding plate 10 is opened along the opening 11, the adjusting column 23 is driven to move outward by the adjusting arc plate 25, so that the end plate 20 and the first insertion pipe 19 move outward synchronously, so that the first insertion pipe 19 is separated from the air pipe 17, the live insertion part 9 and the filter part 8 are disconnected, then the personnel pulls out the adjusting rod 31, inserts it with another insertion column 30, and pulls the adjusting rod 31, so that the new filter part 8 is rotated to the docking position of the live insertion part 9, and the adjusting rod 31 is placed in the groove, then the personnel closes the shielding plate 10, and the shielding plate 10 is closed under the adsorption of the abutting plate 28 and the magnetic plate 29, and the adjusting column 23 is limited by the adjusting arc plate 25, and is driven by the return spring 21 to abut with the air pipe 17, so that the to-be-detected gas can pass through the new filter part 8 smoothly.

[0055] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the application can be varied in a multitude of ways. Such alterations, many of which will be apparent to those skilled in the art, can be based on current technology, and it is intended that the present application encompass any or all such alterations.

[0056] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, which is defined by the appended claims and their equivalents.

Claims

1. A high-sensitivity detection device based on gas-phase ion mobility spectrometry, characterized in that, include: The detection equipment body (1) has an air intake component (2) on one side. Also includes: A filter cartridge (3) is fixed to one side of the main body (1) of the detection equipment. An insertion tube (4) is fixed inside the filter cartridge (3). An air guiding component (5) is installed inside the insertion tube (4). A rotating ring (6) is rotatably fitted onto the outside of the insertion tube (4). A partition (7) is fixed to the outside of the rotating ring (6), and a filter (8) is installed on the rotating ring (6). A movable insertion part (9) is installed on the insertion tube (4) to mate with the filter (8). The movable insertion part (9) is connected to the air intake component (2) and the air guide component (5); and, The filter cylinder (3) has an opening (11) and the baffle (10) is slidably installed at the opening (11). An adjusting member (12) for adjusting the movable insert (9) is installed on the inner side of the baffle (10). The air guiding component (5) includes an air guiding tube (13) fixed on the inner wall of the insertion tube (4). The air guiding tube (13) has an outlet tube (14) fixed at the bottom end of the insertion tube (4) and the other end is connected to the movable insertion part (9). An inlet tube (15) is fixed inside the insertion tube (4). A carrier tube (16) connected to the air inlet component (2) is fixed at the outer end of the filter cylinder (3). The inlet tube (15) is connected to the carrier tube (16). A magnetic block is provided at the joint between the filter section (8) and the rotating ring (6). Both ends of the filter section (8) are fixed with air pipes (17), and the filter section (8) is connected to the movable insertion part (9) through the air pipes (17). The movable insertion part (9) includes a fixing plate (18) fixed at both ends of the insertion tube (4). A first insertion tube (19) is slidably inserted into the fixing plate (18). One end of the first insertion tube (19) is connected to the ventilation tube (17). An end plate (20) is fixed on the outside of the first insertion tube (19). A return spring (21) is sleeved on the outside of the first insertion tube (19) and abuts against the end plate (20) and the fixing plate (18). The outer end of one of the first insertion tubes (19) is fixedly connected to the air guide tube (13), and the outer end of the other first insertion tube (19) is fixedly connected to a hose (22) connected to the air intake component (2). The adjusting component (12) includes an adjusting column (23) fixed on the end plate (20), a limiting tube (24) fixed on the first insertion tube (19), and the limiting tube (24) slidingly connected to the fixing plate (18). An adjusting arc plate (25) that fits against the adjusting column (23) is fixed on the inner wall of the shielding plate (10), and the side of the adjusting arc plate (25) near the adjusting column (23) has an arc-shaped surface structure.

2. The high-sensitivity detection device based on gas-phase ion mobility spectrometry according to claim 1, characterized in that: The outer ends of the air inlet tube (15) and the air outlet tube (14) are tapered.

3. The high-sensitivity detection device based on gas-phase ion mobility spectrometry according to claim 1, characterized in that: Both ends of the rotating ring (6) are fixed with end rings (26), and the end rings (26) have notches (27) at the positions corresponding to the vent pipe (17).

4. The high-sensitivity detection device based on gas-phase ion mobility spectrometry according to claim 1, characterized in that: The outer side of the shielding plate (10) is fixed with a bonding plate (28), and the outer wall of the filter cylinder (3) is fixed with a magnetic plate (29) that magnetically attracts the bonding plate (28).

5. The high-sensitivity detection device based on gas-phase ion mobility spectrometry according to claim 1, characterized in that: The partition (7) is provided with a post (30), and an adjusting rod (31) is inserted into one of the posts (30). The adjacent surfaces of the baffle (10) and the filter cylinder (3) are provided with grooves that are adapted to the adjusting rod (31).

6. The high-sensitivity detection device based on gas-phase ion mobility spectrometry according to claim 1, characterized in that: A pinch plate (32) is fixed to the outside of the shield (10).

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