Portable protective atmospheric environment assessment equipment suitable for green low-carbon monitoring

Abstract

The invention discloses portable protective atmospheric environment assessment equipment suitable for green low-carbon monitoring, and belongs to the technical field of atmospheric environment detection.The portable protective atmospheric environment assessment equipment comprises a portable handheld shell, a data assessment display screen is installed on the outer side of the shell, and an air pump is fixedly installed on the inner side of the shell; meanwhile, the gas inlet end and the gas conveying end of the gas pump are communicated with a sampling gas pipe and a sample discharging pipe respectively, a detection module is installed on the sample discharging pipe in a sealed and penetrating mode, and a first rubber piece and a second rubber piece used for adjusting gas conveying are connected between the lower portion of the fixed pipe and the upper portion of the movable pipe; the movable pipe drives the first rubber part and the second rubber part to be twisted and unfolded when lifting and rotating. The portable protective atmospheric environment assessment equipment suitable for green low-carbon monitoring can perform multi-angle position sampling in a certain area, can perform automatic back flushing on a pipeline after detection is completed, ensures the detection precision, and can perform plugging and protection on the pipeline in a non-use state at the same time.

Description

Technical Field

[0001] This invention relates to the field of atmospheric environment monitoring technology, specifically a portable and protective atmospheric environment assessment device suitable for green and low-carbon monitoring. Background Art

[0002] As the direct carrier of carbon emissions and the greenhouse effect, the atmospheric environment's quality and changes in greenhouse gas concentrations are key indicators for measuring the effectiveness of green and low-carbon development. Therefore, accurate and efficient monitoring and assessment of the atmospheric environment is of great practical significance. When conducting green and low-carbon monitoring, atmospheric environment assessment equipment is needed to detect and analyze the atmospheric environment.

[0003] The prior art (Chinese patent announcement number: CN220584159U, published on 2024-03-12) discloses an atmospheric environment assessment device suitable for carbon monitoring, including an umbrella-shaped gas collection part and an upper and lower monitoring box; the umbrella-shaped gas collection part and the monitoring box are sealed together by a fixing sleeve; the umbrella-shaped gas collection part includes a protective cover, a mixing fan, a base plate, a partition, a special-shaped air inlet pipe, a moisture absorption section, a handle, and a fixing hook; the monitoring box is equipped with an air inlet sleeve, a carbon monitoring instrument, a power supply unit, and a limiting ring; it is equipped with a moisture absorption section with replaceable moisture absorption material to reduce the moisture content in the gas entering the monitor and reduce errors; the arched protective cover can vertically cover the bottom to reduce the possibility of rainwater wetting the device and damaging the parts; when the device is not in use, the upper and lower parts can be retracted for flexible storage, achieving both rain protection and portability.

[0004] Existing technology (Chinese patent publication number: CN118169337A, publication date: 2024-06-11) discloses an intelligent portable gas detector alarm, which includes: a front cover, a display touch screen, a back cover, a filter valve, buttons, a gas port, a trademark, a filter plug, an alligator clip, an air inlet pipe, an exhaust pipe, a gas chamber, a gas sensor, an air pump, a battery, a circuit board, a charging module, a speaker, screws; light holes, a sign, a warning sign, and a charging data port. Ambient gas enters the gas chamber through the filter valve, air inlet pipe, air pump, and exhaust pipe; or it diffuses into the gas chamber through the filter plug and then enters the gas sensor for detection. The detection data is analyzed by the analysis module on the circuit board and displayed on the display touch screen. Alarm information activates the LEDs on the circuit board, causing the light holes to flash, and an audio warning is issued through the speaker. Features include: a large, aesthetically pleasing, and comprehensive display of detection information; a touch screen interface for intuitive and reliable operation; gas detection with both pump-suction and diffusion modes; and powerful integrated audio and video warnings.

[0005] Although existing atmospheric environmental assessment equipment has the function of vent covering and protection, it cannot effectively remove the residual gas sample in the pipeline after use and before closing the vent. This makes the inner wall of the pipeline and the sensor detection end susceptible to contamination, which will affect the accuracy of subsequent re-detection and has certain defects in use. Summary of the Invention

[0006] The purpose of this invention is to provide a portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring, in order to solve the problem mentioned in the background art that although the atmospheric environment assessment devices on the market have the function of covering and protecting the vents, they cannot effectively remove the residual gas samples in the pipeline after use and before closing the vents, which makes the inner side of the pipeline wall and the sensor detection end easily contaminated.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a portable and protective atmospheric environment assessment device suitable for green and low-carbon monitoring, comprising a portable and handheld housing, with a data assessment display screen mounted on the outer side of the housing, and an air pump fixedly mounted on the inner side of the housing. The air pump's inlet and outlet ends are respectively connected to a sampling air tube and a discharge tube, and a detection module is sealed and installed through the discharge tube. A pressure regulating component driven by negative pressure is slidably disposed on the inner side of the sampling air tube, and an extension tube assembly is raised and lowered on the outer side of the sampling air tube. The pressure regulating component slides down... The drive extension tube assembly moves upward and extends outward from the outside of the sampling gas tube. A backwashing assembly for flushing the pipeline is provided between the air pump and the sample discharge tube. The backwashing assembly includes a fixed tube fixedly installed at the lower end of the air pump and a sliding sleeve that is slidably installed on the upper part of the sample discharge tube. The upper end of the sliding sleeve is elastically rotatably connected to a movable tube. A first rubber component and a second rubber component for adjusting gas delivery are connected between the lower part of the fixed tube and the upper part of the movable tube. When the movable tube moves up and down and rotates, it drives the first rubber component and the second rubber component to twist and unfold in order to deliver gas to flush the pipeline.

[0008] Preferably, the pressure regulating component includes a movable slip ring that is slidably disposed inside the sampling tube, and an elastic sealing film is provided on the inner side of the movable slip ring to seal against each other. The sampling tube, the movable slip ring and the elastic sealing film form a sealing structure. At the same time, the movable slip ring and the elastic sealing film slide down along the inner wall of the sampling tube under the action of negative pressure, and the elastic sealing film undergoes elastic deformation when the negative pressure continues to increase.

[0009] Preferably, the extension tube assembly includes a lifting sleeve that is slidably installed on the outside of the sampling tube via a slide groove, and a spring is connected between the lifting sleeve and the lower end of the sampling tube. A traction rope is fixedly connected between the movable slip ring and the lifting sleeve. During the downward movement of the movable slip ring, the lifting sleeve is pulled upward by the traction rope.

[0010] Preferably, a telescopic sleeve is rotatably mounted on the upper end of the lifting sleeve, and a spiral guide groove is provided on the outer wall of the telescopic sleeve. The telescopic sleeve extends through the top of the housing, and a ball bearing is embedded in the inner wall of the through hole at the top of the housing. The ball bearing rolls along the guide groove to drive the telescopic sleeve to rotate. A sampling head is fixedly mounted on the top of the telescopic sleeve, and air inlets are evenly provided on the side wall of the sampling head.

[0011] Preferably, the movable tube is sleeved on the top of the sampling tube, and the inner diameter of the movable tube is larger than the inner diameter of the sampling tube. The first and second adhesive parts connecting the fixed tube and the movable tube are both cylindrical structures. During the elastic rotation of the movable tube, it cooperates with the fixed tube to twist the first and second adhesive parts. The sampling tube and the movable tube are sealed together.

[0012] Preferably, when the air pressure inside the first adhesive component increases, it expands, driving the movable tube to rotate elastically on the sliding sleeve, and simultaneously driving the sliding sleeve to slide on the outside of the sample dispensing tube. When the movable tube rotates and resets, it twists the first adhesive component, and when the first adhesive component twists, it simultaneously pulls the sliding sleeve and the movable tube upward.

[0013] Preferably, when the movable tube moves downward and rotates, it works with the fixed tube to stretch the second rubber part and return it to a cylindrical shape. The first rubber part, the second rubber part, the fixed tube, and the movable tube form a sealed structure. An air inlet pipe is connected to the fixed tube, and a filter purification element is fixedly connected to the upper end of the air inlet pipe. The filter purification element is fixedly installed through the side wall of the housing. When the second rubber part is stretched, the air inlet pipe draws in purified gas through the filter purification element and stores it between the first rubber part and the second rubber part.

[0014] Preferably, the fixed tube is equipped with an air blowing pipe, which connects the internal space of the fixed tube and the space between the first and second adhesive parts. The air blowing pipe is equipped with a one-way pressure valve structure. The movable tube is equipped with an air blowing pipe of the same structure. When the second adhesive part is twisted, air is blown into the fixed tube and the movable tube through the air blowing pipe to achieve backflushing cleaning.

[0015] Preferably, the lower end of the sliding sleeve is fixedly connected to a sealing block by a connecting rod, and the sealing block is fitted and sealed to the lower end of the discharge tube. The connecting rod slides through the lower end of the housing, and a cleaning component fitted to the inner wall of the movable tube is fixedly provided.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring can perform multi-angle sampling within a certain area, and can automatically backflush the pipeline after the test to ensure the detection accuracy. At the same time, the pipeline can be blocked and protected when not in use. The specific details are as follows. 1. Equipped with a sampling air tube and a telescopic sleeve, the movable slip ring and elastic sealing film move downward along the inner side of the sampling air tube under air pressure when the air pump is started. This allows the movable slip ring to pull the lifting sleeve upward on the outer side of the sampling air tube via a traction rope, thereby causing the telescopic sleeve to extend automatically. During the extension of the telescopic sleeve, it can rotate synchronously with the cooperation of the guide groove and ball bearings, thus sampling from different positions in the detection area at multiple angles, ensuring sampling uniformity and improving the accuracy of subsequent detection.

[0017] 2. The system is equipped with a movable tube, a first adhesive component, and a second adhesive component. Initially, the first and second adhesive components are twisted. When the air pump is working, the air pressure inside the first adhesive component gradually increases, causing it to stretch and gradually return to a cylindrical shape. At this time, the movable tube moves downward and rotates, thereby driving the second adhesive component to stretch and unfold synchronously. After the test is completed, the movable tube will rotate elastically, twisting the first and second adhesive components again, thereby venting the gas inside both components and flushing the pipeline to prevent residual gas and impurities from contaminating the pipeline and affecting the accuracy of subsequent tests.

[0018] 3. It is equipped with a movable slip ring, an elastic sealing film, and a sealing block. After the test is completed, the movable slip ring and the elastic sealing film will move upward and reset, thereby sealing the top of the sampling tube. At the same time, during the upward movement of the sliding sleeve, the sealing block will move upward synchronously through the connecting rod, thereby sealing the lower end of the discharge tube and effectively protecting the pipeline. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention from a bottom view; Figure 3 This is a schematic diagram of the main cross-sectional structure of the present invention; Figure 4 This is a schematic diagram of the side sectional structure of the present invention; Figure 5 This is a schematic cross-sectional view of the sampling trachea and telescopic sleeve of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the installation structure of the sampling tube and movable slip ring of the present invention; Figure 8 This is a schematic diagram of the installation structure of the fixed tube and the movable tube of the present invention; Figure 9 This is a schematic diagram of the connection structure between the sample outlet tube and the movable tube of the present invention; Figure 10This is a cross-sectional structural diagram of the fixed tube, movable tube, and sample outlet tube of the present invention; Figure 11 This is a schematic diagram showing the disassembled structure of the fixed tube, movable tube, and sorting tube of the present invention.

[0020] In the diagram: 1. Housing; 2. Data evaluation display screen; 3. Air pump; 4. Sampling air tube; 5. Movable slip ring; 6. Elastic sealing film; 7. Lifting sleeve; 8. Traction rope; 9. Telescopic sleeve; 10. Guide groove; 11. Ball bearing; 12. Sampling head; 13. Sampling tube; 14. Fixed tube; 15. Sliding sleeve; 16. Movable tube; 17. First rubber component; 18. Second rubber component; 19. Air inlet pipe; 20. Filter purification component; 21. Air blowing pipe; 22. Cleaning component; 23. Detection module; 24. Connecting rod; 25. Sealing block. Detailed Implementation

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Existing atmospheric environment assessment equipment makes it inconvenient to effectively clean the pipelines after use, resulting in residual gases and impurities affecting the accuracy of subsequent tests. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-10 As shown; A portable and protective atmospheric environment assessment device suitable for green and low-carbon monitoring includes a portable and handheld housing 1, with a data assessment display screen 2 installed on the outside of the housing 1, and an air pump 3 fixedly installed on the inside of the housing 1. The air pump 3 has an inlet end and an outlet end connected to a sampling air tube 4 and a discharge tube 13, respectively, and a detection module 23 is sealed and installed through the discharge tube 13. A pressure regulating component driven by negative pressure is slidably arranged on the inside of the sampling air tube 4, and an extension tube assembly is raised and lowered on the outside of the sampling air tube 4. During the downward movement of the pressure regulating component, the extension tube assembly is driven to move upward and extend outward on the outside of the sampling air tube 4.

[0023] The pressure regulating assembly includes a movable slip ring 5 that is slidably mounted inside the sampling tube 4, and an elastic sealing sheet 6 that fits and seals against the inner side of the movable slip ring 5. The sampling tube 4, the movable slip ring 5, and the elastic sealing sheet 6 form a sealing structure. Under negative pressure, both the movable slip ring 5 and the elastic sealing sheet 6 slide downwards along the inner wall of the sampling tube 4. Furthermore, the elastic sealing sheet 6 undergoes elastic deformation as the negative pressure continues to increase. The extension tube assembly includes a lifting sleeve 7 that is slidably mounted on the outside of the sampling tube 4 via a sliding groove, and a spring connects the lifting sleeve 7 to the lower end of the sampling tube 4. Furthermore, a traction rope 8 is fixedly connected between the movable slip ring 5 and the lifting sleeve 7. During the downward movement of the movable slip ring 5, the lifting sleeve 7 is pulled upward by the traction rope 8. A telescopic sleeve 9 is rotatably installed at the upper end of the lifting sleeve 7. A spiral guide groove 10 is opened on the outer wall of the telescopic sleeve 9. The telescopic sleeve 9 extends through the top of the housing 1. A ball bearing 11 is embedded in the inner wall of the through hole at the top of the housing 1. The ball bearing 11 rolls along the guide groove 10 to drive the telescopic sleeve 9 to rotate. A sampling head 12 is fixedly installed at the top of the telescopic sleeve 9. Air inlets are evenly opened on the side wall of the sampling head 12.

[0024] like Figure 1 - Figure 7 As shown, when testing is required, hold the housing 1, place the sampling head 12 in the testing position, and start the equipment to make the air pump 3 start working. When the air pump 3 starts, the air pressure inside the sampling air tube 4 decreases, causing the movable slip ring 5 and the elastic sealing film 6 to move downward along the inner side of the sampling air tube 4 under the action of air pressure. At the same time, the movable slip ring 5 will pull the lifting sleeve 7 to slide upward on the outer side of the sampling air tube 4 through the traction rope 8. At this time, the lifting sleeve 7 will drive the telescopic sleeve 9 to synchronously extend and retract, thereby changing the sampling position of the sampling head 12. When the telescopic sleeve 9 extends and retracts, the upper end of the housing 1... The ball bearing 11 slides along the spiral guide groove 10, so that the telescopic sleeve 9 rotates synchronously when it moves upward, thereby adjusting the orientation of the air inlet on the sampling head 12 and effectively improving the sampling uniformity. When the telescopic sleeve 9 cannot move upward, the negative pressure inside the sampling air tube 4 is further increased, and the elastic sealing film 6 will undergo elastic deformation under the action of air pressure, so that the air supply channel between the sampling air tube 4 and the air pump 3 is opened, realizing normal air intake and sampling. To ensure that the telescopic sleeve 9 can move under the action of negative pressure, the lifting sleeve 7 and the telescopic sleeve 9 can be made of lightweight plastic material.

[0025] like Figures 4-10As shown, a backflushing assembly for flushing the pipeline is provided between the air pump 3 and the sample discharge pipe 13. The backflushing assembly includes a fixed pipe 14 fixedly installed at the lower end of the air pump 3 and a sliding sleeve 15 slidably installed on the upper part of the sample discharge pipe 13. The upper end of the sliding sleeve 15 is elastically rotatably connected to a movable pipe 16. A first adhesive component 17 and a second adhesive component 18 for adjusting gas delivery are connected between the lower part of the fixed pipe 14 and the upper part of the movable pipe 16. When the movable pipe 16 moves up and down, it drives the first adhesive component 17. The second rubber component 18 is twisted and unfolded to deliver gas to flush the pipeline. The movable tube 16 is sleeved on the top of the sample discharge tube 13, and the inner diameter of the movable tube 16 is larger than the inner diameter of the sample discharge tube 13. The first rubber component 17 and the second rubber component 18 connecting the fixed tube 14 and the movable tube 16 are both cylindrical structures. At the same time, during the elastic rotation of the movable tube 16, it cooperates with the fixed tube 14 to twist the first rubber component 17 and the second rubber component 18. The sample discharge tube 13 and the movable tube 16 are sealed together.

[0026] When the air pressure inside the first adhesive component 17 increases, it expands, driving the movable tube 16 to rotate elastically on the sliding sleeve 15. Simultaneously, it drives the sliding sleeve 15 to slide on the outside of the discharge tube 13. When the movable tube 16 rotates back to its original position, it twists the first adhesive component 17. Simultaneously, the twisting of the first adhesive component 17 pulls the sliding sleeve 15 and the movable tube 16 upwards. When the movable tube 16 rotates downwards, it works with the fixed tube 14 to stretch the second adhesive component 18 and return it to a cylindrical shape. The first adhesive component 17, the second adhesive component 18, the fixed tube 14, and the movable tube 16 form a sealed structure. An air inlet pipe 19 is connected to the fixed tube 14, and a filter / purification element 20 is fixedly connected to the upper end of the air inlet pipe 19, penetrating the fixed tube. Installed on the side wall of housing 1, when the second plastic part 18 is stretched, the air inlet pipe 19 draws in purified gas through the filter purification component 20 and stores it between the first plastic part 17 and the second plastic part 18. The fixed pipe 14 is equipped with an air blowing pipe 21, which connects the internal space of the fixed pipe 14 and the space between the first plastic part 17 and the second plastic part 18. The air blowing pipe 21 is equipped with a one-way pressure valve structure. The movable pipe 16 is equipped with an air blowing pipe 21 of the same structure. When the second plastic part 18 is twisted, air is blown into the fixed pipe 14 and the movable pipe 16 through the air blowing pipe 21 to achieve backflushing cleaning. The inner wall of the movable pipe 16 is fixedly equipped with a cleaning component 22 that fits against the inner wall of the discharge pipe 13.

[0027] like Figures 8-10As shown, with the start of the air pump 3, the air pressure inside the first adhesive part 17 gradually increases, causing the first adhesive part 17 to stretch and recover under the action of air pressure, gradually returning to a cylindrical shape. As the first adhesive part 17 recovers, the sliding sleeve 15 drives the movable tube 16 to move downward on the outer side of the upper part of the sample discharge tube 13. At the same time, the movable tube 16 will elastically rotate under the drive of the first adhesive part 17. With the elastic rotation of the movable tube 16, it can synchronously stretch the second adhesive part 18, causing the second adhesive part 18 to gradually recover to a cylindrical shape. During the recovery process of the second adhesive part 18, the space between it and the first adhesive part 17 gradually increases, so that the space between the two can automatically draw in filtered clean air through the air inlet pipe 19 and the filter purification element 20. When the sample gas passes through the sample discharge tube 13, the detection module 23 can accurately detect the gas and transmit the detection data through a digital... As shown on the evaluation display screen 2, after the test is completed, the movable tube 16 will elastically rotate and reset, which can be controlled by a torsion spring. As the movable tube 16 rotates and resets, it can drive the first rubber part 17 and the second rubber part 18 to twist again. At this time, the air inside the first rubber part 17 is discharged, causing the gas in the pipeline to flow to both ends, achieving preliminary rinsing. When the second rubber part 18 twists, the clean air drawn in inside it will be pressurized and blown to the inside of the pipeline through the air blowing pipe 21, achieving a second rinsing and preventing residual samples from affecting the accuracy of the next test. At the same time, the upward movement and rotation of the movable tube 16 can drive the cleaning part 22 to further clean the inside of the sample discharge tube 13. After long-term use, the sliding sleeve 15 can be pulled back and forth by holding the sealing block 25, thereby driving the movable tube 16 to move back and forth and rotate, achieving manual backflushing and ensuring the cleaning effect.

[0028] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. In existing atmospheric environment assessment equipment, after testing, the pipeline remains connected to the outside air, making the inner wall of the pipeline and the testing mechanism prone to impurities and contamination, which in turn affects the testing accuracy and service life. To further solve this technical problem, this example discloses the following technical content: Figures 7-11 As shown; a pressure regulating component driven by negative pressure is slidably provided on the inner side of the sampling tube 4, and an extension tube assembly is installed on the outer side of the sampling tube 4. During the downward movement of the pressure regulating component, the extension tube assembly is driven to move upward and extend on the outer side of the sampling tube 4. The lower end of the sliding sleeve 15 is fixedly connected to a sealing block 25 through a connecting rod 24, and the sealing block 25 is fitted and sealed to the lower end of the discharge tube 13. The connecting rod 24 slides through the lower end of the housing 1.

[0029] When the air pump 3 stops working, the lifting sleeve 7 will slide down under the action of the spring force, causing the telescopic sleeve 9 to retract, thus preventing the telescopic sleeve 9 from being damaged because it is always outside the housing 1. At the same time, the movable slip ring 5 will move up under the pull of the traction rope 8, and work with the elastic sealing film 6 to seal the upper end of the sampling air tube 4. When the sliding sleeve 15 moves up, it will pull the sealing block 25 up synchronously through the connecting rod 24, thereby sealing the lower end of the sample discharge tube 13 and achieving effective protection of the equipment pipeline.

[0030] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring, comprising a portable handheld housing (1), and a data assessment display screen (2) installed on the outside of the housing (1), and an air pump (3) fixedly installed on the inside of the housing (1), wherein the air inlet end and the air outlet end of the air pump (3) are respectively connected to a sampling air pipe (4) and a sampling pipe (13), and a detection module (23) is sealed and installed through the sampling pipe (13). Its features are, The sampling tube (4) is slidably provided with a pressure regulating component driven by negative pressure on the inner side, and an extension tube assembly is installed on the outer side of the sampling tube (4) by lifting and lowering. During the downward movement of the pressure regulating component, the extension tube assembly is driven to move upward and extend on the outer side of the sampling tube (4). A backwashing component for flushing the pipeline is provided between the air pump (3) and the discharge tube (13). The backwashing component includes a fixed tube (14) fixedly installed at the lower end of the air pump (3) and a sliding sleeve (15) slidably installed on the upper part of the discharge tube (13). The upper end of the sliding sleeve (15) is elastically rotatably connected to a movable tube (16). A first rubber part (17) and a second rubber part (18) for adjusting gas delivery are connected between the lower part of the fixed tube (14) and the upper part of the movable tube (16). When the movable tube (16) is lifted and rotated, it drives the first rubber part (17) and the second rubber part (18) to twist and unfold so as to deliver gas to flush the pipeline.

2. The portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 1, characterized in that: The pressure regulating component includes a movable slip ring (5) that is slidably mounted inside the sampling tube (4), and an elastic sealing sheet (6) that fits and seals against each other is provided on the inner side of the movable slip ring (5). The sampling tube (4), the movable slip ring (5) and the elastic sealing sheet (6) form a sealing structure. At the same time, the movable slip ring (5) and the elastic sealing sheet (6) slide down along the inner wall of the sampling tube (4) under the action of negative pressure. The elastic sealing sheet (6) undergoes elastic deformation when the negative pressure continues to increase.

3. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 2, characterized in that: The extension tube assembly includes a lifting sleeve (7) that is slidably installed on the outside of the sampling tube (4) via a slide groove. A spring is connected between the lifting sleeve (7) and the lower end of the sampling tube (4). A traction rope (8) is fixedly connected between the movable slip ring (5) and the lifting sleeve (7). During the downward movement of the movable slip ring (5), the lifting sleeve (7) is pulled upward by the traction rope (8).

4. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 3, characterized in that: The upper end of the lifting sleeve (7) is rotatably mounted with a telescopic sleeve (9), and the outer wall of the telescopic sleeve (9) is provided with a spiral guide groove (10). The telescopic sleeve (9) extends through the top of the housing (1), and a ball bearing (11) is embedded in the inner wall of the through hole at the top of the housing (1). At the same time, the ball bearing (11) rolls along the guide groove (10) to drive the telescopic sleeve (9) to rotate. A sampling head (12) is fixedly mounted on the top of the telescopic sleeve (9), and air inlets are evenly provided on the side wall of the sampling head (12).

5. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 1, characterized in that: The movable tube (16) is sleeved on the top of the sampling tube (13), and the inner diameter of the movable tube (16) is larger than the inner diameter of the sampling tube (13). The first rubber part (17) and the second rubber part (18) connecting the fixed tube (14) and the movable tube (16) are both cylindrical structures. During the elastic rotation of the movable tube (16), it cooperates with the fixed tube (14) to twist the first rubber part (17) and the second rubber part (18). The sampling tube (13) and the movable tube (16) are sealed together.

6. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 5, characterized in that: When the air pressure inside the first adhesive part (17) increases, it expands, driving the movable tube (16) to rotate elastically on the sliding sleeve (15), and at the same time driving the sliding sleeve (15) to slide on the outside of the sample tube (13). When the movable tube (16) rotates and resets, it twists the first adhesive part (17), and when the first adhesive part (17) twists, it simultaneously pulls the sliding sleeve (15) and the movable tube (16) upward.

7. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 6, characterized in that: When the movable tube (16) moves down and rotates, it works with the fixed tube (14) to stretch the second rubber part (18) and return it to a cylindrical shape. The first rubber part (17), the second rubber part (18), the fixed tube (14) and the movable tube (16) form a sealed structure. An air inlet pipe (19) is connected to the fixed tube (14). At the same time, a filter purification element (20) is fixedly connected to the upper end of the air inlet pipe (19). The filter purification element (20) is fixedly installed through the side wall of the housing (1). When the second rubber part (18) is stretched, the air inlet pipe (19) draws in the purified gas through the filter purification element (20) and stores it between the first rubber part (17) and the second rubber part (18).

8. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 7, characterized in that: An air blowing pipe (21) is installed on the fixed pipe (14), and the air blowing pipe (21) connects the internal space of the fixed pipe (14) and the space between the first rubber part (17) and the second rubber part (18). The air blowing pipe (21) is equipped with a one-way pressure valve structure. The movable pipe (16) is equipped with an air blowing pipe (21) of the same structure. When the second rubber part (18) is twisted, air is blown into the fixed pipe (14) and the movable pipe (16) through the air blowing pipe (21) to achieve backflushing cleaning.

9. A portable protective atmospheric environment assessment device suitable for green and low-carbon monitoring according to claim 1, characterized in that: The lower end of the sliding sleeve (15) is fixedly connected to a sealing block (25) via a connecting rod (24), and the sealing block (25) is fitted and sealed to the lower end of the discharge tube (13). The connecting rod (24) slides through the lower end of the housing (1), and a cleaning component (22) is fixedly provided on the inner wall of the movable tube (16) and fitted to the inner wall of the discharge tube (13).

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