A kind of gas drying and purifying mechanism for non-opening inspection of container dangerous goods

Abstract

The application discloses a kind of gas drying purification mechanism for container dangerous goods non-opening box inspection, including shell, the dry cavity is arranged in the inside of shell, the dispersing mechanism that can be dispersed to the gas of being drawn in is arranged in the inside of connecting head, so as to facilitate the uniform drying of drying agent, the connecting plate is internally provided with the avoidance slot, and the connecting pipe is connected in the inside of avoidance slot, the electric telescopic rod is installed in the sliding sleeve by plate element, the filter mechanism that can detect the dust of being mixed in gas in filter cotton is arranged in the inside of first air bag, when the blockage of dust in long-term filtering process occurs, timely warn people to replace filter cotton, the vertical pipe is threadedly connected in the inside of sleeve head bottom, the gas return pipe end and the vertical pipe are communicated.The application can completely dry the gas extracted in container by dispersing mechanism, so as to improve the effect of gas in gas chromatography-mass spectrometry.

Description

Technical Field

[0001] This invention relates to the field of container dangerous goods inspection technology, specifically a gas drying and purification mechanism for non-opening inspection of container dangerous goods. Background Technology

[0002] Open-container inspection is a crucial method for regulatory authorities to inspect dangerous goods in containers. However, this method suffers from cumbersome procedures and low efficiency. With the rapid development of analytical testing technologies, non-open-container inspection technologies such as X-ray scanning and gas analysis are constantly expanding and being applied. Among these, gas analysis technology, as an important means of cargo identification, has received widespread attention. This technology collects volatile organic compounds (VOCs) from the exhaust hood outside the container. After drying and purifying the collected gas samples, qualitative analysis is performed using gas chromatography-mass spectrometry (GC-MS). The GC-MS analysis results are compared with a mass spectrometry database to determine the composition of the analytes. By collecting and analyzing the VOCs inside the container, the qualitative results of the gas analysis can, to some extent, determine the type of cargo inside the container, thereby assessing whether the cargo is hazardous and whether an open-container inspection is necessary. The existing gas purification and drying processes for gases collected from inside containers are overly cumbersome and costly. Furthermore, the purification process is often uneven, leading to incomplete purification and significantly impacting the effectiveness of gas chromatography-mass spectrometry (GC-MS) analysis and inspection. Additionally, the continuous drying of purified gas by silica gel desiccant in the same location within the drying chamber reduces the desiccant's ability to adsorb moisture over prolonged periods of continuous gas flow, resulting in poor drying and reduced accuracy of GC-MS analysis and detection of gases collected from inside containers. Therefore, it is necessary to provide a gas drying and purification mechanism for non-opening inspection of dangerous goods in containers to address these technical problems. Summary of the Invention

[0003] The purpose of this invention is to provide a gas drying and purification mechanism for non-opening inspection of dangerous goods in containers, in order to solve the problems mentioned in the background art, namely that the existing gas purification and drying process collected inside the container is too cumbersome and costly, and that the purified gas is continuously dried by silica gel desiccant in the same place in the drying box, resulting in incomplete drying of the gas and seriously affecting the analysis and inspection effect of gas chromatography-mass spectrometry. The technical solution of this invention provides a solution that is significantly different from the existing technology, addressing the problem that the existing technical solutions are too simplistic.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a gas drying and purification mechanism for non-opening inspection of dangerous goods in containers, comprising a housing, a drying chamber disposed inside the housing, a connector mounted above the inner side of the drying chamber, a dispersing mechanism disposed inside the connector to disperse the drawn-in gas, thereby facilitating uniform drying of the gas by a desiccant, a mesh plate layered below the inner side of the drying chamber, a connecting plate connected to the bottom of the drying chamber, a clearance groove provided inside the connecting plate, and a connecting pipe penetrating through the clearance groove, the rear end of the connecting pipe being installed with the housing, and the bottom of the drying chamber being connected to the left and right sides. The device is equipped with an air guide head and an air return pipe. A sliding sleeve is slidably connected to the lower inner side of the air guide head. An electric telescopic rod is mounted on the sliding sleeve via a plate. A main pipe is connected to the right side of the connecting pipe. An air pump is installed on the upper inner side of the outer shell. An inner sleeve head is connected to the bottom of the air pump. A first air bladder is provided below the inner sleeve head. An outer sleeve head is slidably connected to both the upper and lower sides of the first air bladder. A filter mechanism is provided inside the first air bladder to detect when the filter cotton becomes clogged with dust in the gas during long-term filtration and to promptly warn people to replace the filter cotton. A vertical pipe is threaded to the inner bottom of the outer sleeve head. The end of the air return pipe is connected to the vertical pipe.

[0005] In a further embodiment, the front and rear inner walls of the outer casing are provided with sliding grooves, and the inner side of the outer casing is connected to a drive wheel via a drive shaft.

[0006] In a further embodiment, a sliding plate is installed on the front side of the drying chamber, and a sliding strip is connected to the rear side of the drying chamber, with a plug provided on one side of each drying chamber.

[0007] In a further embodiment, both the slide plate and the slide bar form a left-right sliding structure with the sliding grooves on the front and rear inner walls of the drying chamber.

[0008] In a further embodiment, a sealing plate is connected to the upper inner side of the connector, and a corrugated pipe is arrayed and connected through the lower inner side of the sealing plate.

[0009] In a further embodiment, the dispersing mechanism includes a threaded rod with a bearing connected to the inner side of the connector, and a dispersing roller is installed on the outer side of the threaded rod. A guide post is threadedly connected to the outer side of the threaded rod, and an extrusion plate is installed at the bottom of the guide post. Nozzles are arrayed below the inner side of the extrusion plate.

[0010] In a further embodiment, the outer side of the extrusion plate and the guide groove on the inner wall of the drying chamber form a lifting and sealing sliding structure, the inner wall of the connector and the outer side of the guide post form an upper and lower sealing sliding structure, and the inner sides of the extrusion plate and the guide post are both connected through the bellows.

[0011] In a further embodiment, a rack is installed at the bottom of the connecting plate, and the rack meshes with the drive wheel.

[0012] In a further embodiment, the filtering mechanism includes an inner tube installed between the two outer sleeves, and air outlets are arrayed on the outer side of the inner tube. A mesh frame is provided on the outer side of the inner tube, and a mesh plate is connected to the inner side of the mesh frame. Filter cotton capable of filtering dust inside the gas is provided between the mesh plate and the inner tube. A first spring is connected between the mesh plate and the mesh frame.

[0013] In a further embodiment, a second spring is connected to the bottom of the vertical tube, and a pressing sleeve is movably connected to the outer side of the bottom of the vertical tube. A limiting block is provided on the outer side of the bottom of the pressing sleeve, and the limiting block and the trapezoidal groove above the drying chamber form a left-right sliding structure.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention includes a filtration mechanism that utilizes a first spring and a pressure sensor connected between the mesh frame and the mesh plate. When gas enters, the filter cotton, due to blockages caused by long-term use, is compressed by the gas, pushing the filter cotton and mesh plate outwards. This, combined with the contraction of the first spring, compresses the pressure sensor. At this point, the pressure sensor, via a microcontroller, prompts the user to replace the filter cotton. Compared to existing technologies, this invention provides timely reminders for replacement and installation when the filter cotton becomes clogged. 2. This invention features a dispersion mechanism. Through a corrugated pipe array running through the inner side of the sealing plate, combined with a squeezing plate and a connected shower-type nozzle, the extracted gas is evenly sprayed onto the lower inner side of the drying chamber. It is then dried and detected by silica gel desiccants placed between two layers of mesh plates. The rotation of the threaded rod drives the guide column and squeezing plate downwards simultaneously, effectively squeezing the gas downwards. This allows the gas to be thoroughly dried and detected by passing through the two layers of silica gel desiccants. Multiple electrically controlled one-way valves and a color sensor recirculate any gas that fails the test back to the inner side of the vertical pipe, undergoing repeated drying in multiple drying chambers until the gas is completely dried. Only then is the gas collected inside the second airbag and finally connected to the gas chromatography-mass spectrometry inlet pipe via a fitting on the lower right side of the second airbag for final inspection. Compared to existing technologies, this structure thoroughly dries the gas inside the container, thereby improving the effectiveness of gas chromatography-mass spectrometry inspection. 3. In summary, when the gas purification and drying device is not in use, the air pump can draw dry air from the outside into the inside, and then the air flows out from the tube on the right side of the second air bladder, allowing the silica gel desiccant to be dried by the flowing air. This ensures that the silica gel desiccant can be reused without affecting its effectiveness. When the silica gel desiccant expires, the door panel on the left side of the outer shell can be manually pulled upwards to remove it, the drying chamber can be taken out, the plug can be removed, and finally the silica gel desiccant can be drained and replaced. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a preferred embodiment of the gas drying and purification mechanism for non-opening inspection of dangerous goods in containers provided by the present invention. Figure 2 for Figure 1 The diagram shows a top-section of the structure. Figure 3 for Figure 1 The diagram shows the installation structure of the mesh plate and filter cotton. Figure 4 for Figure 1 The diagram shows the installation structure of the vertical tube and the second spring. Figure 5 for Figure 4 The enlarged structural diagram at point A is shown below; Figure 6 for Figure 4 The enlarged structural diagram at point B is shown below; Figure 7 for Figure 4 The diagram shows the installation structure of the bellows and guide post.

[0016] In the diagram: 1. Outer shell; 101. Slide groove; 102. Drive wheel; 2. Drying chamber; 201. Slide plate; 202. Slide bar; 203. Plug; 3. Connector; 301. Sealing plate; 302. Bellows; 4. Dispersing mechanism; 401. Threaded rod; 401a. Dispersing roller; 402. Guide column; 403. Extrusion plate; 404. Nozzle; 5. Mesh plate; 6. Connecting plate; 601. Rack; 7. Clearance groove; 8. Air guide head; 801. Sliding sleeve; 802. Electric telescopic rod; 9. Connecting pipe; 901. Main pipe; 10. Air return pipe; 11. Air pump; 12. Inner sleeve; 13. Outer sleeve; 14. First airbag; 15. Filtering mechanism; 1501. Inner pipe; 1502. Air outlet; 1503. Mesh frame; 1504. Mesh plate; 1505. Filter cotton; 1506. First spring; 16. Vertical pipe; 1601. Second spring; 1602. Downward pressing sleeve; 1603. Limiting block; 17. Second airbag. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-7 One embodiment of the present invention provides a gas drying and purification mechanism for non-opening inspection of dangerous goods in containers, comprising a shell 1, a slide 101, a drive wheel 102, a drying chamber 2, a sliding plate 201, a sliding strip 202, a plug 203, a connector 3, a sealing plate 301, a corrugated pipe 302, a dispersing mechanism 4, a threaded rod 401, a dispersing roller 401a, a guide column 402, a pressing plate 403, a nozzle 404, a mesh plate 5, a connecting plate 6, a rack 601, a clearance groove 7, a gas guide head 8, a sliding sleeve 801, and an electric telescopic rod 8. 02. Connecting pipe 9, main pipe 901, return pipe 10, air pump 11, inner sleeve 12, outer sleeve 13, first airbag 14, filter mechanism 15, inner pipe 1501, air outlet 1502, mesh frame 1503, mesh plate 1504, filter cotton 1505, first spring 1506, vertical pipe 16, second spring 1601, pressing sleeve 1602 and limiting block 1603. A drying chamber 2 is provided inside the outer shell 1, and a connector 3 is installed above the inner side of the drying chamber 2. The inner side of the connector 3 is provided with a function to allow the drawn-in gas to pass through. A dispersion mechanism 4 is provided to facilitate uniform drying of the desiccant. A mesh plate 5 is installed in layers on the lower inner side of the drying chamber 2, and a connecting plate 6 is connected to the bottom of the drying chamber 2. An avoidance groove 7 is provided on the inner side of the connecting plate 6, and a connecting pipe 9 is connected through the avoidance groove 7. The rear end of the connecting pipe 9 is installed with the outer shell 1. Air guide heads 8 and return air pipes 10 are connected to the left and right sides of the bottom of the drying chamber 2. A sliding sleeve 801 is slidably connected to the lower inner side of the air guide head 8. An electric telescopic rod 802 is installed on the sliding sleeve 801 through a plate. The right side of the connecting pipe 9 is connected to... There is a main pipe 901. An air pump 11 is installed on the upper inner side of the outer casing 1. The bottom of the air pump 11 is connected to an inner sleeve 12. A first air bag 14 is set below the inner sleeve 12. The upper and lower sides of the first air bag 14 are sealed with outer sleeves 13. The inner side of the first air bag 14 is equipped with a filter mechanism 15 that can detect when the filter cotton 1505 becomes clogged with dust in the gas during long-term filtration and promptly warn people to replace the filter cotton 1505. The bottom inner side of the outer sleeve 13 is threaded with a vertical pipe 16. The end of the return air pipe 10 is connected to the vertical pipe 16. Example 1

[0019] Please see Figure 1 and Figure 3The filtration mechanism 15 includes an inner tube 1501 installed between two outer sleeves 13, with air outlets 1502 arranged in an array on the outer side of the inner tube 1501. A mesh frame 1503 is provided on the outer side of the inner tube 1501, and a mesh plate 1504 is connected to the inner side of the mesh frame 1503. A filter cotton 1505 is provided between the mesh plate 1504 and the inner tube 1501 to filter dust inside the gas. A first spring 1506 is connected between the mesh plate 1504 and the mesh frame 1503. The gas inside the container is first drawn into the inner tube 1501 by the air pump 11 through the air gun and air inlet pipe, in conjunction with the inner sleeve 12 and outer sleeve 13. The gas is then evenly filtered for dust through the filter cotton 1505 through the air outlets 1502, and the filtered gas enters the first airbag through the mesh plate 1504 and mesh frame 1503. 14. Note that the first airbag 14 is flat in its initial state. When the first airbag 14 expands, it can temporarily store the drawn-in gas. Since the filter cotton 1505 will become clogged during long-term use, once the filter cotton 1505 becomes clogged, it can no longer filter the drawn-in gas. In order to remind people to replace the clogged filter cotton 1505, a first spring 1506 and a pressure sensor are connected between the mesh frame 1503 and the mesh plate 1504. When gas enters, due to the blockage of the filter cotton 1505, it can push the filter cotton 1505 and the mesh plate 1504 to move outward when squeezed by the gas. In conjunction with the contraction of the first spring 1506, it squeezes the pressure sensor. At this time, the pressure sensor prompts people through the microcontroller that the filter cotton 1505 needs to be replaced. Example 2

[0020] Please see Figure 1-2 and Figure 4-7The outer casing 1 has grooves 101 on both the front and rear inner walls, and a drive wheel 102 is connected to the inner side of the outer casing 1 via a drive shaft. In a further embodiment, a sliding plate 201 is installed on the front side of the drying chamber 2, and a sliding strip 202 is connected to the rear side of the drying chamber 2. A plug 203 is provided on one side of each drying chamber 2. The sliding plate 201 and the sliding strip 202 form a left-right sliding structure with the grooves 101 on the front and rear inner walls of the drying chamber 2. A sealing plate 301 is connected to the upper inner side of the connector 3, and a bellows 302 is arrayed and connected through the lower inner side of the sealing plate 301. The dispersing mechanism 4 includes a threaded rod 401 with a bearing connected to the inner side of the connector 3, and a dispersing roller 401a is installed on the outer side of the threaded rod 401. A guide post 402 is threadedly connected to the outer side of the threaded rod 401. A pressing plate 403 is installed at the bottom of the drying chamber 2. Spray nozzles 404 are arrayed below the inner side of the pressing plate 403. The outer side of the pressing plate 403 and the guide groove on the inner wall of the drying chamber 2 form a lifting and sealing sliding structure. The inner wall of the connector 3 and the outer side of the guide post 402 form an upper and lower sealing sliding structure. The inner sides of the pressing plate 403 and the guide post 402 are both connected to the bellows 302 through the pipe. A rack 601 is installed at the bottom of the connector 6, and the rack 601 meshes with the drive wheel 102. A second spring 1601 is connected to the bottom of the vertical pipe 16, and a downward pressing sleeve 1602 is movably connected to the outer side of the bottom of the vertical pipe 16. A limit block 1603 is provided on the outer side of the bottom of the downward pressing sleeve 1602, and the limit block 1603 and the trapezoidal groove above the drying chamber 2 form a left and right sliding structure. The servo motor drives the drive wheel 102 to rotate. Since the drive wheel 102 is a half gear, when it rotates, it works with the rack 601 to drive the connecting plate 6 to move intermittently to the right. This causes multiple drying chambers 2 to slide in a sealed manner under the thrust of the upper pressing sleeve 1602 and the second spring 1601. When the through hole above the first drying chamber 2 on the right connects with the through hole at the bottom of the pressing sleeve 1602, the vertical center line of the sliding sleeve 801 coincides with the vertical center line of the connecting pipe 9. Then, the electric telescopic rod 802 is activated by the control button to push the sliding sleeve 801 downward, so that the sliding sleeve 801 is sealed and embedded inside the sleeve above the connecting pipe 9. At this time, the gas inside the first airbag 14 passes through its elastic compression. The gas temporarily stored inside the first airbag 14 is squeezed through the vertical pipe 16 and the button valve to the inner side above the connector 3 by the force of the vertical pipe 16. Because the return pipe 10 connected to the outside of the vertical pipe 16 is equipped with an electrically controlled one-way valve, and the model of the electrically controlled one-way valve is MKS02W, the gas will not be introduced into the inner side of the return pipe 10. Then, it is evenly sprayed into the lower inner side of the drying chamber 2 through the corrugated pipe 302 arrayed through the inner side of the sealing plate 301, in conjunction with the extrusion plate 403 and the connected shower head 404. Two layers of mesh plates 5 are set in the lower inner side of the drying chamber 2, and silica gel desiccant is placed between the two layers of mesh plates 5. The two layers of desiccant distributed on the upper and lower sides can dry the incoming gas. At this time, in order to disperse the incoming gas more evenly,To improve the drying effect of silica gel desiccant on the gas, the micro motor at the bottom of the sealing plate 301 can be activated to drive the threaded rod 401 to rotate, which in turn moves the guide column 402 and the extrusion plate 403 downwards simultaneously. A one-way button valve is installed inside the end of the bellows 302. When the extrusion plate 403 presses downwards, it does not cause the gas to flow back upwards; instead, it presses the gas downwards, allowing it to pass through both layers of silica gel desiccant for thorough drying. If the gas is completely dried by the first layer of desiccant, when it passes through the second layer of silica gel desiccant, if... If the silica gel desiccant layer does not change color, it indicates that the gas is completely dried. At this point, the dried gas will be forced through the gas guide head 8, along with the electrically controlled one-way valve, into the sliding sleeve 801 and the inner side of the connecting pipe 9. Then, it will be forced through the main pipe 901, along with the one-way button valve inside, into the inner side of the second air bladder 17 for storage. If the gas still contains moisture when passing through the second layer of silica gel desiccant, the desiccant layer will change color. This color will be identified by a color sensor located at the bottom of the drying chamber 2. The microcontroller will then quickly open the electrically controlled one-way valve in the return air pipe 10, allowing... Gas that fails to dry properly flows back to the inside of the vertical pipe 16 through the return pipe 10. Then, driven by the drive wheel 102 and the rack 601, the connecting plate 6 and the drying chamber 2 are intermittently moved to the right. Since the internal structure of each drying chamber 2 is the same, when the pressing head 1602 above each drying chamber 2 connects to the through hole above the connecting head 3 in sequence, the gas will be repeatedly dried until it is completely dried. Only then will the gas be collected inside the second gasbag 17, and finally, it will be discharged through the pipe on the lower right side of the second gasbag 17 and discharged into the gas chromatograph-mass spectrometer. The air intake pipe of the spectrum is connected and a final inspection is performed. When the gas purification and drying device is not in use, the air pump 11 can draw dry air from the outside into the inside, and then the air flows out from the pipe on the right side of the second airbag 17, allowing the silica gel desiccant to be dried by the flowing air. This ensures that the silica gel desiccant can be reused without affecting its effectiveness. When the silica gel desiccant expires, it can be manually removed by pulling the left door panel of the outer casing 1 upwards, removing the drying chamber 2, removing the plug 203, and finally draining and replacing the silica gel desiccant.

[0021] Working principle: such as Figure 1-7As shown, the air inside the container is first drawn into the inner tube 1501 by the air pump 11 through the air gun and air inlet pipe, in conjunction with the inner sleeve head 12 and outer sleeve head 13. The air is then evenly filtered for dust through the filter cotton 1505 via the air outlet 1502. The filtered air then passes through the mesh plate 1504 and mesh frame 1503 into the first airbag 14. Note that the first airbag 14 is initially flat. When it expands, it temporarily stores the drawn-in air. However, the filter cotton 1505 may become clogged during long-term use. Once the filter cotton 1505 becomes clogged, it can no longer filter the incoming gas. To remind people to replace the clogged filter cotton 1505, a first spring 1506 and a pressure sensor are connected between the mesh frame 1503 and the mesh plate 1504. When gas enters, due to the blockage of the filter cotton 1505, it can be pushed outward by the gas compression, and the compression of the first spring 1506 can also compress the pressure sensor. At this time, the pressure sensor prompts people to replace the filter cotton 1505 through the microcontroller. Next, the servo motor drives the drive wheel 102 to rotate. Since the drive wheel 102 is a half gear, when it rotates, it can work with the rack 601 to drive the connecting plate 6 to move intermittently to the right. This causes multiple drying chambers 2 to slide in a sealed manner under the thrust of the upper pressing sleeve 1602 and the second spring 1601. When the through hole above the first drying chamber 2 on the right connects with the through hole at the bottom of the pressing sleeve 1602, the vertical center line of the sliding sleeve 801 will also coincide with the vertical center line of the connecting pipe 9. Then, the electric telescopic rod 802 is activated by the control button to push the sliding sleeve 801 downward, so that the sliding sleeve 801 is sealed and embedded inside the sleeve above the connecting pipe 9. At this time, the gas inside the first airbag 14 passes through its elasticity. The gas temporarily stored inside the first airbag 14 is squeezed through the vertical pipe 16 and the button valve to the inner side above the connector 3 by the force of the vertical pipe 16. Since the return pipe 10 connected to the outside of the vertical pipe 16 is equipped with an electrically controlled one-way valve, and the model of the electrically controlled one-way valve is MKS02W, the gas will not be introduced into the inner side of the return pipe 10. Then, it is evenly sprayed into the lower inner side of the drying chamber 2 through the corrugated pipe 302 arrayed through the inner side of the sealing plate 301, in conjunction with the extrusion plate 403 and the connected shower head 404. Two layers of mesh plates 5 are set in the lower inner side of the drying chamber 2, and silica gel desiccant is placed between the two layers of mesh plates 5. The two layers of desiccant distributed on the upper and lower sides can dry the incoming gas. At this time, in order to make the incoming gas more evenly dispersed, The high-density silica gel desiccant effectively dries the gas. At this point, the micro motor at the bottom of the sealing plate 301 is activated, driving the threaded rod 401 to rotate and simultaneously moving the guide column 402 and the extrusion plate 403 downwards. A one-way button valve is installed inside the end of the bellows 302. When the extrusion plate 403 presses downwards, it does not cause the gas to flow back upwards; instead, it presses the gas downwards, allowing it to pass through both layers of silica gel desiccant for thorough drying. If the gas is completely dried by the first layer of desiccant, and then passes through the second layer of silica gel desiccant without changing color, it indicates that the gas is completely dried. The dried gas then passes through the air guide head 8, which, in conjunction with the electrically controlled one-way valve, presses it into the sliding sleeve 801 and the inner side of the connecting pipe 9. Then, through the main pipe 901, in conjunction with the one-way button valve on its inner side, the gas is squeezed into the inner side of the second air bag 17 for storage. If the gas passes through the second layer of silica gel desiccant, and if the gas still contains moisture, the desiccant in that layer will change color. This color is identified by a color sensor located at the bottom of the drying chamber 2. Then, the microcontroller quickly opens the electrically controlled one-way valve in the return air pipe 10, allowing the gas that has not been properly dried to flow back to the inner side of the vertical pipe 16 through the return air pipe 10. Then, through the drive wheel 102 in conjunction with the rack 601, the connecting plate 6 and the drying chamber 2 continue to move intermittently to the right. Since the internal structure of each drying chamber 2 is the same, when the pressing head 1602 above each drying chamber 2 connects sequentially with the through hole above the connecting head 3,The gas will be repeatedly dried until it is completely dried before being collected inside the second gasbag 17. Finally, it will be connected to the gas chromatograph-mass spectrometer inlet tube via a fitting on the lower right side of the second gasbag 17 for final inspection. When the gas purification and drying device is not in use, the air pump 11 can draw the dry air from the outside into the inside, and then the air flows out from the tube on the right side of the second air bag 17, so that the silica gel desiccant can be dried by the flowing air, thus ensuring that the silica gel desiccant can be reused without any change in its effectiveness. At the same time, when the silica gel desiccant expires, the door panel on the left side of the outer shell 1 can be manually pulled upwards to remove it, and the drying chamber 2 can be taken out. Then the plug 203 can be removed, and finally the silica gel desiccant can be drained and replaced. This completes a series of operations.

[0022] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate orientations or positional relationships based on the accompanying drawings, and are used only for ease of description and simplification, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas drying and purification mechanism for non-opening inspection of dangerous goods in containers, comprising a housing (1), characterized in that: Multiple drying chambers (2) are provided inside the outer shell (1), and a connector (3) is installed on the upper inner side of the drying chamber (2). A dispersing mechanism (4) is provided inside the connector (3). A mesh plate (5) is installed in layers on the lower inner side of the drying chamber (2). A connecting plate (6) is connected to the bottom of the drying chamber (2). An avoidance groove (7) is opened on the inner side of the connecting plate (6), and a connecting pipe (9) is connected through the avoidance groove (7). The rear end of the connecting pipe (9) is installed with the outer shell (1). A guide head (8) and a return air pipe (10) are connected to the left and right sides of the bottom of the drying chamber (2). A sliding sleeve (801) is slidably connected to the lower inner side of the guide head (8). An electric telescopic rod (802) is installed on the sliding sleeve (801) through a plate. The right side of the connecting pipe (9) is connected to... There is a main pipe (901), an air pump (11) is installed on the upper inner side of the outer shell (1), and an inner sleeve (12) is connected to the bottom of the air pump (11). A first airbag (14) is provided below the inner sleeve (12). An outer sleeve (13) is sealed to the upper and lower sides of the first airbag (14). A filter mechanism (15) is provided inside the first airbag (14) to detect when the filter cotton (1505) becomes clogged with dust in the gas during long-term filtration and to promptly warn people to replace the filter cotton (1505). A vertical pipe (16) is threaded to the inner bottom of the outer sleeve (13). The end of the return air pipe (10) is connected to the vertical pipe (16). A second airbag (17) is provided on the right side of the outer shell (1), and the second airbag (17) is connected to the main pipe (901). A sealing plate (301) is connected to the upper inner side of the connector (3), and a bellows (302) is arrayed and connected to the lower inner side of the sealing plate (301). The dispersing mechanism (4) includes a threaded rod (401) with a bearing connected to the inside of the connector (3), and a dispersing roller (401a) is installed on the outside of the threaded rod (401). A guide post (402) is threadedly connected to the outside of the threaded rod (401). An extrusion plate (403) is installed at the bottom of the guide post (402). Nozzles (404) are arranged in an array below the inside of the extrusion plate (403). The outer side of the extrusion plate (403) and the guide groove on the inner wall of the drying chamber (2) form a lifting and sealing sliding structure. The inner wall of the connector (3) and the outer side of the guide post (402) form an upper and lower sealing sliding structure. The inner sides of the extrusion plate (403) and the guide post (402) are both connected to the bellows (302) through the pipe. The bottom of the vertical tube (16) is connected to a second spring (1601), and the bottom outer side of the vertical tube (16) is movably connected to a pressing sleeve (1602). A limiting block (1603) is provided on the bottom outer side of the pressing sleeve (1602), and the limiting block (1603) and the trapezoidal groove above the drying chamber (2) form a left-right sliding structure. The gas is uniformly sprayed into the lower inner side of the drying chamber (2) by the corrugated pipe (302) in conjunction with the extrusion plate (403) and the connected shower head (404). The gas is dried and tested by the two layers of silica gel desiccant placed between the two mesh plates (5). The rotation of the threaded rod (401) drives the guide column (402) and the extrusion plate (403) to move downwards at the same time, squeezing the gas downwards. The gas is then fully dried and tested by the two layers of silica gel desiccant. In conjunction with multiple electrically controlled one-way valves and color sensors, the gas that fails the test is returned to the inner side of the vertical pipe (16) through the return pipe (10). Since the structural design of each drying chamber (2) is the same, when the pressure sleeve (1602) above each drying chamber (2) is connected to the through hole above the connector (3) in sequence, the gas will be repeatedly dried until the gas is completely dried and then collected inside the second air bag (17).

2. The gas drying and purification mechanism for non-opening inspection of dangerous goods in containers according to claim 1, characterized in that: The outer shell (1) has grooves (101) on both the front and rear inner walls, and a drive wheel (102) is connected to the inner side of the outer shell (1) via a drive shaft.

3. A gas drying and purification mechanism for non-opening inspection of dangerous goods in containers according to claim 2, characterized in that: A sliding plate (201) is installed on the front side of the drying chamber (2), and a sliding strip (202) is connected to the rear side of the drying chamber (2). A plug (203) is provided on one side of each drying chamber (2).

4. A gas drying and purification mechanism for non-opening inspection of dangerous goods in containers according to claim 3, characterized in that: The sliding plate (201) and the sliding strip (202) both form a left-right sliding structure with the sliding groove (101) on the inner front and rear inner walls of the drying chamber (2).

5. A gas drying and purification mechanism for non-opening inspection of dangerous goods in containers according to claim 2, characterized in that: A rack (601) is installed at the bottom of the connecting plate (6), and the rack (601) meshes with the drive wheel (102).

6. A gas drying and purification mechanism for non-opening inspection of dangerous goods in containers according to claim 1, characterized in that: The filtering mechanism (15) includes an inner tube (1501) installed between the two outer sleeves (13), and air outlets (1502) are arranged in an array on the outer side of the inner tube (1501). A mesh frame (1503) is provided on the outer side of the inner tube (1501), and a mesh plate (1504) is connected to the inner side of the mesh frame (1503). A filter cotton (1505) that can filter dust inside the gas is provided between the mesh plate (1504) and the inner tube (1501). A first spring (1506) is connected between the mesh plate (1504) and the mesh frame (1503).

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