KRW silanization sampling tube for detecting ambient air

Abstract

The invention discloses a KRW silanization sampling tube for ambient air detection, and belongs to the technical field of air particulate matter detection.The KRW silanization sampling tube for ambient air detection comprises a connecting box, and one side of the connecting box is fixedly connected with a sampling cylinder; a sampling mechanism is mounted in the center of the interior of the sampling cylinder, a limiting mechanism is mounted in the center of the interior of the connecting box, and a placing mechanism is arranged in the center of the limiting mechanism; a plurality of connecting holes communicated with each other are formed between the connecting box and the sampling cylinder, a plurality of groups of sampling discs are arranged in the placing mechanism, and sampling films with different specifications and sizes are respectively mounted at the centers of the plurality of groups of sampling discs. By designing the sampling mechanism, multiple groups of samples with different specifications can be collected at a time, particulate matters in air can be collected from sizes, the final detection data error is reduced, and the sampling efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of air particulate matter detection technology, specifically relating to a KRW silanized sampling tube for detecting ambient air. Background Technology

[0002] Suspended particulate matter generally refers to a complex mixture of tiny solid and liquid particles suspended in the air. Ambient air silanized sampling tubes are specialized devices for collecting suspended particulate matter in the atmosphere. Their core feature is the chemical modification of the inner wall of the tube using a silanizing agent, forming a hydrophobic and inert siloxane coating. This treatment effectively shields the active groups (such as silanol groups) on glass or plastic surfaces, reducing the adsorption loss of polar molecules (such as aldehydes and phenols), and significantly improving the collection efficiency and stability of volatile organic compounds (VOCs), semi-volatile organic compounds (SOCs), and certain inorganic gases. In the field of environmental monitoring, silanized sampling tubes are widely used in industrial emissions, indoor air, and traffic pollution scenarios, and are particularly suitable for long-term sampling of low-concentration particulate matter. They are typically designed to be used in conjunction with a filter membrane to achieve the separation of gaseous and particulate matter.

[0003] There are various suspended particulate matter in the air. When collecting them, air pumps are usually used to draw air into the sampling tube at a constant flow rate. The suspended particulate matter in the collected air is intercepted and collected through a sampling membrane. Then the sampling membrane is removed and a new sampling membrane is installed to collect multiple samples to reduce data errors. However, this membrane replacement method is relatively cumbersome and results in low overall collection efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a KRW silanized sampling tube for detecting ambient air.

[0005] The technical solution adopted to solve the above technical problems is: a KRW silanized sampling tube for detecting ambient air, including a connecting box, wherein a sampling tube is fixedly connected to one side of the connecting box; A sampling mechanism is installed at the center of the sampling tube, a limiting mechanism is installed at the center of the connecting box, and a placement mechanism is provided at the center of the limiting mechanism; Multiple interconnected connection holes are provided between the connecting box and the sampling tube. Multiple sets of sampling discs are provided in the placement mechanism, and sampling membranes of different sizes are installed in the center of each of the multiple sets of sampling discs. The multiple connection holes facilitate the transport of multiple sampling discs.

[0006] Furthermore, a sealing door is installed at the rear end of the connecting box, a first threaded seat is fixedly connected to the top center of the connecting box, limit grooves are opened at the bottom of the inner walls of the front and rear ends of the connecting box, multiple limit holes are opened at the top of the front end of the connecting box, multiple first slots are provided on one side of the connecting box, a first push plate is slidably connected in each of the multiple first slots, and a first push frame is fixedly connected between the multiple first push plates, with the first push frame located on one side of the connecting box.

[0007] With the above technical solution, after multiple sampling discs have finished sampling, the sealed door can be opened to remove the placement mechanism, thus facilitating the removal of multiple sampling discs and allowing for the collection of multiple sets of data at once, improving the accuracy of the detection data. Multiple limiting holes allow staff to easily observe the sampling discs being collected. Different limiting holes can be switched when using different sampling discs. When changing different sampling discs, the first pusher is pushed, which in turn pushes multiple first push plates, thereby pushing the sampling disc that is about to be sampled, achieving rapid switching of sampling discs and improving sampling efficiency.

[0008] Furthermore, a second threaded seat is fixedly connected to the top center of the sampling tube, an air inlet pipe is fixedly connected to one side of the top of the sampling tube, an air outlet pipe is fixedly connected to the bottom center of the sampling tube, a second slot is opened on one side of the sampling tube, a second push plate is slidably connected in each of the multiple second slots, and a second push frame is fixedly connected between the multiple second push plates, with the second push frame located on one side of the sampling tube.

[0009] With the above technical solution, when it is necessary to sample particulate matter in the air, an external air pump is connected to the outlet pipe, and air is drawn from the outlet pipe. This draws in outside air through the sampling tube and the inlet pipe, allowing the air to enter the sampling tube through the inlet pipe and pass through the sampling mechanism. The air is then collected from the particulate matter in the air through the corresponding sampling membrane. After multiple sampling membranes have been collected, when a new sampling membrane needs to be replaced, the second pusher is pushed, which in turn pushes multiple second push plates, thereby pushing the collected sampling tray. This facilitates the replacement of the new sampling tray and improves sampling efficiency.

[0010] Furthermore, the sampling mechanism includes a first sampling seat fixedly connected to the inner surface of the bottom of the sampling cylinder. A second sampling seat, a third sampling seat, and a fourth sampling seat are sequentially arranged at the center of the sampling cylinder and above the first sampling seat. Rubber rings are fixedly connected to the top of the first sampling seat, the top and bottom of the second and third sampling seats, and the bottom of the fourth sampling seat. Sampling grooves are provided on the top of the first sampling seat, the top and bottom of the second and third sampling seats, and the bottom of the fourth sampling seat. Two first springs are fixedly connected to each of the first, second, third, and fourth sampling seats. Limiting rods are fixedly connected to the front and rear ends of the sampling cylinder. A first threaded rod is rotatably connected to the top center of the fourth sampling seat.

[0011] The above technical solution allows for the collection of particulate matter from the air. Sampling discs of different sizes are placed on top of the first, second, and third sampling seats. Particulate matter is collected sequentially from largest to smallest, from top to bottom. Rotating the first threaded rod within the second threaded seat pushes the fourth sampling seat, causing it to press down on the two connected first springs. This causes the rubber rings on the fourth and third sampling seats to adhere to each other. The first threaded rod continues to rotate, ensuring that the rubber rings on the third and second sampling seats, as well as those on the second and first sampling seats, are tightly fitted together. At this point, the multiple sampling discs are respectively fitted between their corresponding sampling slots, ensuring a sealed sampling environment. When outside air enters the sampling cylinder through the inlet pipe, it first contacts the sampling membrane on the fourth sampling seat, intercepting and collecting large particles. Then, it sequentially contacts the sampling membranes on the third, second, and first sampling seats, collecting particles from largest to smallest. After collection, the first threaded rod is rotated in the opposite direction, resetting the first, second, third, and fourth sampling seats for easy replacement of new sampling discs.

[0012] Furthermore, the plurality of sampling slots are located on the inner side of the rubber ring, and the two limiting rods pass through the first sampling seat, the second sampling seat, the third sampling seat and the fourth sampling seat and the corresponding first spring. The first threaded rod is threadedly connected to the second threaded seat.

[0013] With the above technical solution, when the first sampling seat, the second sampling seat, the third sampling seat, and the fourth sampling seat are reset, each pair of first springs can reset the first sampling seat, the second sampling seat, the third sampling seat, and the fourth sampling seat to their initial positions, which facilitates the replacement of new sampling discs and improves sampling efficiency.

[0014] Furthermore, the limiting mechanism includes a second threaded rod threadedly connected to a first threaded seat, a top plate rotatably connected to the bottom end of the second threaded rod, a first mounting groove formed on the front end of the outer wall of the top plate, a second spring fixedly connected in the first mounting groove, a protrusion fixedly connected to the outer end of the second spring, a third spring fixedly connected to the center of the bottom inner surface of the plurality of connecting boxes, a base plate fixedly connected to the top end of the third spring, two limiting blocks fixedly connected to the outer wall of the base plate, a second mounting groove formed on the bottom of the top plate and the top of the base plate, a fourth spring fixedly connected in each of the two second mounting grooves, and a positioning plate fixedly connected to the outer end of each of the two fourth springs.

[0015] With the above technical solution, after the first batch of sampling trays is collected, the second pusher is pushed, which in turn pushes multiple second push plates, thereby pushing the corresponding sampling trays. This allows multiple sampling trays to be pushed into their corresponding placement slots through the connecting holes. When the next batch of sampling trays needs to be replaced, the second threaded rod is rotated, causing it to rotate within the first threaded seat. This pushes the top plate downwards, causing the top plate to push the placement frame, which in turn pushes the base plate. The base plate then compresses the third spring. Simultaneously, the top plate causes the protrusion to move downwards. Under the action of the second spring, the protrusion enters the next limiting hole. At this point, the original placement slot moves downwards, and the new placement slot aligns with the connecting hole. Since multiple placement slots contain sampling trays, the new sampling trays are perfectly aligned with the connecting holes. The first pusher is then pushed, which in turn pushes multiple first push plates, thereby pushing multiple new sampling trays into their corresponding sampling slots, completing the replacement of the sampling trays. The operation is simple, allowing for the collection of multiple sets of samples of different specifications at once, thus improving sampling efficiency.

[0016] Furthermore, the protrusion is located in the corresponding limiting hole, and the two limiting blocks are slidably connected to the corresponding limiting groove.

[0017] With the above technical solution, staff can observe the sampling disc being sampled by looking at the protrusion inside a certain limiting hole. Each batch of sampling discs matches the corresponding limiting hole. When the protrusion moves down into the corresponding limiting hole, it indicates that a new batch of sampling discs has been replaced, which is convenient for staff to observe and improves sampling efficiency.

[0018] Furthermore, the placement mechanism includes a placement frame disposed between the top plate and the bottom plate, wherein the top and bottom centers of the placement frame are provided with positioning grooves, and the placement frame is provided with multiple sets of placement grooves.

[0019] With the above technical solution, multiple sampling disks can be placed in their corresponding slots before sampling, allowing for simultaneous placement of multiple disks and improving the accuracy of the sampling data.

[0020] Furthermore, the two positioning discs are fitted into their corresponding positioning slots.

[0021] With the above technical solution, after the overall sampling is completed, the staff can directly take the entire placement frame. Since the edges of the two positioning plates and the positioning grooves are curved, the two positioning plates will retract under the action of the two fourth springs during the taking process, so that the entire placement frame can be taken out directly. This makes it convenient for the staff to quickly take out the sampling plate inside. After taking it out, the entire placement frame can be put back directly so that the two positioning plates fit into the corresponding positioning grooves. The operation is simple.

[0022] Furthermore, in the combined state, the sampling disk is attached between the two rubber rings, and the sampling membrane is located between the corresponding two sampling slots.

[0023] Through the above technical solution, during the sampling process, the sampling disc is tightly attached between the two corresponding rubber rings to improve the sealing effect, enabling the sampling membrane to accurately collect particulate matter in the air and reduce the error of the final detection data.

[0024] The beneficial effects of the present invention are as follows: (1) By designing a sampling mechanism, the present invention can collect multiple sets of samples of different specifications at one time, and collect particulate matter in the air from the size of the sample, reduce the error of the final detection data, and improve the sampling efficiency; (2) By designing a connecting box, sampling tube and limiting mechanism, the present invention can directly push the corresponding pusher when replacing a new sampling plate, thereby quickly pushing the collected sampling plate into the corresponding slot, and quickly pushing the new sampling plate into the corresponding collection slot. The operation is simple and multiple sets of collection can be completed at one time without having to open a new collection plate for replacement each time, thus improving the sampling efficiency; (3) Through the placement mechanism, the staff can observe the sampling plate being sampled at this time through the protrusion in a certain limiting hole. Each batch of sampling plates matches the corresponding limiting hole. When the protrusion moves down into the corresponding limiting hole, it indicates that a new batch of sampling plates has been replaced, which is convenient for the staff to observe and improves the sampling efficiency. Moreover, each time the placement frame is replaced, it is only necessary to attach the two positioning plates to the corresponding positioning slots, which is simple to operate. Attached Figure Description

[0025] Figure 1 This is a first-view overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective; Figure 3 This is the overall front view of the present invention; Figure 4 This is an overall sectional view of the present invention; Figure 5 This is an unfolded view of some parts inside the sampling tube of the present invention; Figure 6 This is an unfolded view of some parts inside the connecting box of the present invention; Figure 7This is a cross-sectional view of the sampling mechanism of the present invention; Figure 8 This is an unfolded view of some parts of the sampling mechanism of the present invention; Figure 9 This is a cross-sectional view of the connecting box, limiting mechanism, and placement mechanism of the present invention; Figure 10 This is an unfolded view of the limiting mechanism and the placement mechanism of the present invention; Figure 11 This is a schematic diagram of the sampling disk and sampling membrane structure of the present invention; Figure 12 yes Figure 4 A magnified view of a section at point A in the middle; Figure 13 yes Figure 4 A magnified view of a section at point B in the middle; Figure 14 yes Figure 9 A magnified view of a section at point C; Figure 15 yes Figure 4 A magnified view of a section at point D.

[0026] Reference numerals: 1. Connecting box; 11. Sealing door; 12. First threaded seat; 13. Limiting groove; 14. Limiting hole; 15. First slot; 16. First push plate; 17. First push frame; 2. Sampling cylinder; 21. Second threaded seat; 22. Air inlet pipe; 23. Air outlet pipe; 24. Second slot; 25. Second push plate; 26. Second push frame; 3. Sampling mechanism; 301. First sampling seat; 302. Second sampling seat; 303. Third sampling seat; 304. Fourth sampling seat; 305. Rubber ring; 306. Sampling... 307. Groove; 308. First spring; 309. Limiting rod; 4. First threaded rod; 4. Limiting mechanism; 401. Second threaded rod; 402. Top plate; 403. First mounting groove; 404. Second spring; 405. Protrusion; 406. Base plate; 407. Limiting block; 408. Third spring; 409. Second mounting groove; 410. Fourth spring; 411. Positioning plate; 5. Placement mechanism; 501. Placement frame; 502. Positioning groove; 503. Placement groove; 6. Connecting hole; 7. Sampling plate; 71. Sampling membrane. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] like Figures 1-14As shown, a KRW silanized sampling tube for ambient air detection in this embodiment includes a connecting box 1. A sealing door 11 is installed at the rear end of the connecting box 1. A first threaded seat 12 is fixedly connected to the top center of the connecting box 1. Limiting grooves 13 are opened at the bottom of the inner walls of the front and rear ends of the connecting box 1. Multiple limiting holes 14 are opened at the top of the front end of the connecting box 1. Multiple first slots 15 are provided on one side of the connecting box 1. A first push plate 16 is slidably connected in each of the multiple first slots 15. A first push frame 17 is fixedly connected between the multiple first push plates 16. The first push frame 17 is located at the connecting... After all sampling is completed on one side of the box 1, the sealing door 11 can be opened to remove the placement mechanism 5, which facilitates the removal of multiple sampling discs 7. Multiple sets of data can be collected at one time, improving the accuracy of the detection data. Multiple limiting holes 14 allow staff to easily observe the sampling discs 7 that are being collected. Different limiting holes 14 can be switched when using different sampling discs 7. When changing different sampling discs 7, the first pusher 17 is pushed, which in turn pushes multiple first push plates 16, thereby pushing the sampling disc 7 that is about to be sampled, realizing rapid switching of sampling discs 7 and improving sampling efficiency.

[0029] like Figures 1-13 As shown, a sampling tube 2 is fixedly connected to one side of the connecting box 1. A second threaded seat 21 is fixedly connected to the top center of the sampling tube 2. An air inlet pipe 22 is fixedly connected to one side of the top of the sampling tube 2. An air outlet pipe 23 is fixedly connected to the bottom center of the sampling tube 2. A second slot 24 is opened on one side of the sampling tube 2. A second push plate 25 is slidably connected in each of the multiple second slots 24. A second push frame 26 is fixedly connected between the multiple second push plates 25. The second push frame 26 is located on one side of the sampling tube 2. When it is necessary to sample particulate matter in the air, it is pushed outwards... An air pump is connected to an outlet pipe 23 and draws air from the outlet pipe 23, thereby drawing outside air through the sampling cylinder 2 and the inlet pipe 22. The air then enters the sampling cylinder 2 through the inlet pipe 22 and passes through the sampling mechanism 3. The air samples particulate matter from the air through the corresponding sampling membrane 71. After multiple sampling membranes 71 have collected samples, when a new sampling membrane 71 needs to be replaced, the second pusher 26 is pushed, which in turn pushes multiple second push plates 25, thereby pushing the collected sampling tray 7. This facilitates the replacement of the new sampling tray 7 and improves sampling efficiency.

[0030] like Figures 1-8As shown, a sampling mechanism 3 is installed at the center of the sampling cylinder 2. The sampling mechanism 3 includes a first sampling seat 301 fixedly connected to the inner surface of the bottom of the sampling cylinder 2. A second sampling seat 302, a third sampling seat 303, and a fourth sampling seat 304 are sequentially arranged at the center of the sampling cylinder 2 and above the first sampling seat 301. Rubber rings 305 are fixedly connected to the top of the first sampling seat 301, the top and bottom of the second and third sampling seats 302 and 303, and the bottom of the fourth sampling seat 304. Sampling slots 306 are provided at the top of the first sampling seat 301, the top and bottom of the second and third sampling seats 302 and 303, and the bottom of the fourth sampling seat 304. Two first springs 307 are fixedly connected to each other among the second sampling seat 302, the third sampling seat 303, and the fourth sampling seat 304. Limiting rods 308 are fixedly connected to the front and rear ends of the sampling cylinder 2. A first threaded rod 309 is rotatably connected to the top center of the fourth sampling seat 304. When it is necessary to collect particulate matter in the air, and sampling disks 7 of different sizes are placed on the top of the first sampling seat 301, the second sampling seat 302, and the third sampling seat 303, the particulate matter is collected from top to bottom in descending order of size. The first threaded rod 309 is rotated, causing the first threaded rod 309 to rotate within the second threaded seat 21 and push the fourth sampling seat 304, causing the fourth sampling seat 304 to press down on the two connected first springs. Spring 307 causes the rubber ring 305 on the fourth sampling seat 304 to fit against the rubber ring 305 on the third sampling seat 303. The first threaded rod 309 continues to rotate, causing the rubber rings 305 on the third sampling seat 303 and the second sampling seat 302, as well as the second sampling seat 302 and the first sampling seat 301, to fit tightly against each other. At this time, the multiple sampling discs 7 are respectively fitted between the corresponding two sampling slots 306, ensuring a sealed sampling environment for the sampling discs 7. When outside air enters the sampling cylinder 2 through the air inlet pipe 22, it first contacts the sampling membrane 71 on the fourth sampling seat 304, intercepting and collecting large particles, and then sequentially contacts the third sampling seat 303, the second sampling seat 302, and the first sampling seat 301. The sampling membrane 71 on the sampling seat 301 collects particles sequentially from large to small. After collection, the first threaded rod 309 is rotated in the reverse direction, causing the first sampling seat 301, second sampling seat 302, third sampling seat 303, and fourth sampling seat 304 to reset, facilitating the replacement of the new sampling disc 7. Multiple sampling slots 306 are located inside the rubber ring 305. Two limiting rods 308 pass through the first sampling seat 301, second sampling seat 302, third sampling seat 303, and fourth sampling seat 304, as well as the corresponding first spring 307. The first threaded rod 309 is threadedly connected to the second threaded seat 21. When the first sampling seat 301, second sampling seat 302, third sampling seat 303, and fourth sampling seat 304 are reset,Each pair of first springs 307 can reset the first sampling seat 301, second sampling seat 302, third sampling seat 303, and fourth sampling seat 304 to their initial positions, facilitating the replacement of new sampling disks 7 and improving sampling efficiency.

[0031] like Figures 1-15 As shown, a limiting mechanism 4 is installed at the center of the internal structure of the connecting box 1. The limiting mechanism 4 includes a second threaded rod 401 threadedly connected to a first threaded seat 12. A top plate 402 is rotatably connected to the bottom end of the second threaded rod 401. A first mounting groove 403 is provided at the front end of the outer wall of the top plate 402. A second spring 404 is fixedly connected in the first mounting groove 403. A protrusion 405 is fixedly connected to the outer end of the second spring 404. A third spring 408 is fixedly connected to the center of the bottom inner surface of multiple connecting boxes 1. A base plate 406 is fixedly connected to the top end of the third spring 408. Two limiting blocks 407 are fixedly connected to the outer wall of the base plate 406. Both the bottom of the top plate 402 and the top of the base plate 406 are provided with second mounting slots 409. A fourth spring 410 is fixedly connected to each of the two second mounting slots 409, and a positioning plate 411 is fixedly connected to the outer end of each of the two fourth springs 410. After the first batch of sampling plates 7 is collected, the second pusher 26 is pushed, thereby pushing multiple second push plates 25, which in turn push the corresponding sampling plates 7, so that multiple sampling plates 7 are pushed into the corresponding placement slots 503 through the connecting holes 6. When the next batch of sampling plates 7 needs to be replaced, the second threaded rod 401 is rotated, causing the second threaded rod 401 to rotate within the first threaded seat 12, thereby pushing downwards. The top plate 402 pushes the placement frame 501, which in turn pushes the base plate 406, causing the base plate 406 to compress the third spring 408. Simultaneously, the top plate 402 moves the protrusion 405 downwards. Under the action of the second spring 404, the protrusion 405 enters the next limiting hole 14. At this point, the original placement slot 503 moves downwards, aligning with the connecting hole 6. Since multiple placement slots 503 contain sampling disks 7, the new sampling disks 7 are perfectly aligned with the connecting hole 6, pushing the first pusher 17, which in turn pushes multiple first push plates 16, thereby pushing multiple new sampling disks. The sampling tray 7 is pushed into the corresponding sampling slot 306, thus replacing the sampling tray 7. The operation is simple and can collect multiple sets of samples of different sizes at one time, improving sampling efficiency. The protrusion 405 is located in the corresponding limiting hole 14, and the two limiting blocks 407 are slidably connected to the corresponding limiting slot 13. The staff can observe the sampling tray 7 being sampled at this time through the protrusion 405 in a certain limiting hole 14. Each batch of sampling trays 7 matches the corresponding limiting hole 14. When the protrusion 405 moves down into the corresponding limiting hole 14, it indicates that a new batch of sampling trays 7 has been replaced, which is convenient for the staff to observe and improves sampling efficiency.

[0032] like Figures 1-15As shown, a placement mechanism 5 is provided at the center of the limiting mechanism 4. The placement mechanism 5 includes a placement frame 501 located between the top plate 402 and the bottom plate 406. The top and bottom centers of the placement frame 501 are provided with positioning grooves 502. The placement frame 501 is provided with multiple sets of placement grooves 503. Before sampling, multiple sampling discs 7 can be placed in the corresponding placement grooves 503 at the same time to improve the accuracy of sampling data. The two positioning discs 411 are in contact with the corresponding positioning grooves 502. After the overall sampling is completed, the staff can directly remove the entire placement frame 501. Since the edges of the two positioning discs 411 and the positioning grooves 502 are curved, during the removal process, the two positioning discs 411 are contracted under the action of the two fourth springs 410, so that the entire placement frame 501 can be directly removed, which makes it convenient for the staff to quickly remove the sampling discs 7 inside. After removal, the entire placement frame 501 can be put back, so that the two positioning discs 411 are in contact with the corresponding positioning grooves 502. The operation is simple.

[0033] like Figures 1-11 As shown, multiple interconnected connection holes 6 are provided between the connecting box 1 and the sampling tube 2. Multiple sets of sampling discs 7 are provided inside the placement mechanism 5. Sampling membranes 71 of different sizes are installed in the center of each of the multiple sets of sampling discs 7. The multiple connection holes 6 facilitate the transport of multiple sets of sampling discs 7. In the combined state, the sampling discs 7 are attached between two rubber rings 305, and the sampling membranes 71 are located between two corresponding sampling slots 306. During the sampling process, the sampling discs 7 are tightly attached between the two corresponding rubber rings 305 to improve the sealing effect, so that the sampling membranes 71 can accurately collect particulate matter in the air and reduce the error of the final detection data.

[0034] The working principle of this embodiment is as follows: Multiple clean sampling discs 7 are placed in corresponding placement slots 503. The first pusher 17 is pushed, thereby pushing multiple first push plates 16, which in turn push multiple new sampling discs 7, so that the new sampling discs 7 are pushed into the corresponding sampling slots 306. At this time, the first threaded rod 309 is rotated, so that the first threaded rod 309 rotates in the second threaded seat 21 to push the fourth sampling seat 304, so that the fourth sampling seat 304 presses down on the two connected first springs 307, so that the rubber ring 305 on the fourth sampling seat 304 and the third sampling seat... When the rubber ring 305 on 303 is in place, the first threaded rod 309 continues to rotate, causing the rubber rings 305 on the third sampling seat 303 and the second sampling seat 302, as well as the second sampling seat 302 and the first sampling seat 301, to be tightly pressed together. At this time, the multiple sampling discs 7 are respectively pressed between the corresponding two sampling slots 306, ensuring that the sampling discs 7 have a sealed sampling environment. An external air pump is connected to the air outlet pipe 23, and air is drawn from the air outlet pipe 23, thereby drawing in outside air through the sampling cylinder 2 and the air inlet pipe 22, allowing air to enter the sampling cylinder 2 through the air inlet pipe 22. First, the sampling membrane 71 on the fourth sampling seat 304 is contacted to intercept and collect large particles. Then, the sampling membranes 71 on the third sampling seat 303, the second sampling seat 302 and the first sampling seat 301 are contacted in sequence to collect particles from large to small. After collection, the first threaded rod 309 is rotated in the reverse direction, causing the first sampling seat 301, the second sampling seat 302, the third sampling seat 303, and the fourth sampling seat 304 to return to their initial positions. This pushes the second pusher 26, which in turn pushes multiple second push plates 25, thereby pushing the corresponding sampling discs 7. The multiple sampling discs 7 are then pushed through the connecting holes 6 into their corresponding placement slots 503. When it is time to replace the next batch of sampling discs 7, the second threaded rod 401 is rotated within the first threaded seat 12, pushing the top plate 402 downwards. The top plate 402 then pushes the placement frame 501, which in turn pushes the base plate 406. 406 compresses the third spring 408, while the top plate 402 drives the protrusion 405 to move downward. Under the action of the second spring 404, the protrusion 405 enters the next limiting hole 14. At this time, the original placement groove 503 moves downward and the new placement groove 503 is aligned with the connecting hole 6. Since sampling disks 7 are placed in multiple placement grooves 503, the new sampling disks 7 are aligned with the connecting hole 6. The first pusher 17 is pushed again, thereby pushing multiple first push plates 16, thereby pushing multiple new sampling disks 7, so that the new sampling disks 7 are pushed into the corresponding sampling groove 306, completing the replacement of the sampling disk 7. Similarly, a new sampling disk 7 can be replaced again. After the overall sampling is completed, the staff can directly take the entire placement rack 501. Since the edges of the two positioning discs 411 and the positioning grooves 502 are curved, during the taking process, the two positioning discs 411 will retract under the action of the two fourth springs 410, so that the entire placement rack 501 can be taken out directly. This makes it convenient for the staff to quickly take out the sampling discs 7 inside. After taking them out, a new sampling disc 7 can be placed in the corresponding placement groove 503, and the entire placement rack 501 can be put back so that the two positioning discs 411 fit into the corresponding positioning grooves 502.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A KRW silanized sampling tube for detecting ambient air, comprising a connecting box (1), characterized in that: A sampling tube (2) is fixedly connected to one side of the connecting box (1); The sampling tube (2) is equipped with a sampling mechanism (3) at its internal center, and the connecting box (1) is equipped with a limiting mechanism (4) at its internal center. The limiting mechanism (4) is equipped with a placement mechanism (5) at its center. Multiple interconnected connection holes (6) are provided between the connecting box (1) and the sampling tube (2). Multiple sets of sampling discs (7) are provided in the placement mechanism (5). Sampling membranes (71) of different sizes are installed in the center of the multiple sets of sampling discs (7). The multiple connection holes (6) facilitate the transport of multiple sets of sampling disks (7).

2. The KRW silanized sampling tube for ambient air detection according to claim 1, characterized in that, The rear end of the connecting box (1) is equipped with a sealing door (11). The top center of the connecting box (1) is fixedly connected with a first threaded seat (12). Limiting grooves (13) are opened at the bottom of the inner walls of the front and rear ends of the connecting box (1). Multiple limiting holes (14) are opened at the top of the front end of the connecting box (1). Multiple first slots (15) are provided on one side of the connecting box (1). A first push plate (16) is slidably connected in each of the multiple first slots (15). A first push frame (17) is fixedly connected between the multiple first push plates (16). The first push frame (17) is located on one side of the connecting box (1).

3. The KRW silanized sampling tube for ambient air detection according to claim 1, characterized in that, The sampling tube (2) has a second threaded seat (21) fixedly connected to the top center, an air inlet pipe (22) fixedly connected to one side of the top of the sampling tube (2), an air outlet pipe (23) fixedly connected to the bottom center of the sampling tube (2), a second slot (24) is opened on one side of the sampling tube (2), a second push plate (25) is slidably connected in each of the multiple second slots (24), a second push frame (26) is fixedly connected between the multiple second push plates (25), and the second push frame (26) is located on one side of the sampling tube (2).

4. The KRW silanized sampling tube for ambient air detection according to claim 3, characterized in that, The sampling mechanism (3) includes a first sampling seat (301) fixedly connected to the inner surface of the bottom of the sampling tube (2). A second sampling seat (302), a third sampling seat (303), and a fourth sampling seat (304) are sequentially arranged at the center of the sampling tube (2) and above the first sampling seat (301). Rubber rings (305) are fixedly connected to the top of the first sampling seat (301), the tops and bottoms of the second and third sampling seats (302) and the third sampling seat (303), and the bottom of the fourth sampling seat (304). Sampling slots (306) are provided on the top of the first sampling seat (301), the top and bottom of the second sampling seat (302) and the third sampling seat (303), and the bottom of the fourth sampling seat (304). Two first springs (307) are fixedly connected to each other among the first sampling seat (301), the second sampling seat (302), the third sampling seat (303) and the fourth sampling seat (304). Limiting rods (308) are fixedly connected to the front and rear ends of the sampling cylinder (2). A first threaded rod (309) is rotatably connected to the top center of the fourth sampling seat (304).

5. A KRW silanized sampling tube for ambient air detection according to claim 4, characterized in that, Multiple sampling slots (306) are located inside the rubber ring (305), and two limiting rods (308) pass through the first sampling seat (301), the second sampling seat (302), the third sampling seat (303) and the fourth sampling seat (304) and the corresponding first spring (307). The first threaded rod (309) is threadedly connected to the second threaded seat (21).

6. A KRW silanized sampling tube for ambient air detection according to claim 2, characterized in that, The limiting mechanism (4) includes a second threaded rod (401) threadedly connected to a first threaded seat (12). The bottom end of the second threaded rod (401) is rotatably connected to a top plate (402). A first mounting groove (403) is provided at the front end of the outer wall of the top plate (402). A second spring (404) is fixedly connected in the first mounting groove (403). A protrusion (405) is fixedly connected to the outer end of the second spring (404). A third spring (408) is fixedly connected to the center of the bottom inner surface of the multiple connecting boxes (1). A base plate (406) is fixedly connected to the top end of the third spring (408). Two limiting blocks (407) are fixedly connected to the outer wall of the base plate (406). A second mounting groove (409) is provided at the bottom of the top plate (402) and the top of the base plate (406). A fourth spring (410) is fixedly connected in each of the two second mounting grooves (409). A positioning plate (411) is fixedly connected to the outer end of each of the two fourth springs (410).

7. A KRW silanized sampling tube for ambient air detection according to claim 6, characterized in that, The protrusion (405) is located in the corresponding limiting hole (14), and the two limiting blocks (407) are slidably connected to the corresponding limiting groove (13).

8. A KRW silanized sampling tube for ambient air detection according to claim 6, characterized in that, The placement mechanism (5) includes a placement rack (501) disposed between the top plate (402) and the bottom plate (406). The placement rack (501) has a positioning groove (502) at the center of its top and bottom, and multiple placement grooves (503) are provided on the placement rack (501).

9. A KRW silanized sampling tube for ambient air detection according to claim 8, characterized in that, The two positioning discs (411) are fitted with the corresponding positioning grooves (502).

10. A KRW silanized sampling tube for ambient air detection according to claim 4, characterized in that, In the combined state, the sampling disk (7) is attached between two rubber rings (305), and the sampling membrane (71) is located between the corresponding two sampling slots (306).

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