Air quality detection device capable of sampling telescopically

Abstract

The invention discloses an air quality detection device with a telescopic sampling function, and relates to the technical field of air quality detection.The air quality detection device comprises a detection frame and a vacuum pump, a detection module is arranged in the detection frame, a sensor module is installed at the bottom of the detection module, and an exhaust pipe is arranged at one end of the detection frame; the vacuum pump is arranged at one end of the exhaust pipe, and a sampling pipe is mounted at the other end of the detection frame. The air quality detection device capable of sampling telescopically adopts a negative pressure sampling design, the detection frame is vacuumized through the vacuum pump to form stable negative pressure, an air sample quickly enters the detection frame without interference by using atmospheric pressure difference, and the sample can be sealed and isolated through cooperative control of the electric valve I and the electric valve II, so that the sample is prevented from being mixed with external air; and a sensor module consisting of a laser scattering sensor and a PID optical ion sensor is combined, so that the concentration of harmful gases such as particulate matters and VOCs can be accurately detected, and the accuracy and authenticity of sampling and detection data are comprehensively ensured.

Description

Technical Field

[0001] This invention relates to the field of air quality detection technology, specifically to a retractable sampling air quality detection device. Background Technology

[0002] With rapid industrial development and increasing demands for environmental governance, the requirements for the accuracy, convenience, and adaptability of air quality detection are rising. In particular, pollution factors such as industrial exhaust emissions and urban dust are becoming increasingly complex, and the demand for sampling and detection in special scenarios such as high altitudes, deep pits, and enclosed spaces is constantly increasing, which places higher and more detailed demands on the comprehensive performance of air quality detection devices.

[0003] Existing air quality detection devices are mostly fixed structures, and the sampling position and distance cannot be flexibly adjusted, making it difficult to adapt to the sampling needs of special areas such as high altitudes and deep pits. At the same time, traditional sampling methods are prone to problems such as sample mixing with the outside air and residual sample interfering with subsequent detection, resulting in insufficient detection accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a scalable sampling air quality detection device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a retractable sampling air quality detection device, comprising a detection frame and a vacuum pump, wherein a detection module is disposed inside the detection frame, and a sensor module is installed at the bottom of the detection module; an air extraction pipe is disposed at one end of the detection frame, and the vacuum pump is disposed at one end of the air extraction pipe; a sampling pipe is disposed at the other end of the detection frame, and an electric valve is disposed on one side inside the sampling pipe; a connecting plate is disposed at the bottom of the detection frame, and a hydraulic rod is disposed at the bottom of the connecting plate.

[0006] Furthermore, the detection frame is provided with an outer frame, and the interior of the outer frame has a hollow structure.

[0007] Furthermore, a card plate is fitted inside the outer frame, and one side of the outer frame is fixedly connected to a hydraulic rod, while a connecting plate is slidably disposed on the inner surface of the outer frame.

[0008] Furthermore, a fixing component for auxiliary fixation is installed at the bottom of the outer frame, and the fixing component includes a fixing plate, a threaded rod and an adjusting plate. The threaded rod is rotatably installed inside the fixing plate, and an adjusting plate is provided with an external thread at one end of the threaded rod.

[0009] Furthermore, the adjusting plate is slidably disposed at the bottom of the outer frame, and both the fixing plate and the adjusting plate have a rubber layer on their outer surfaces.

[0010] Furthermore, auxiliary straps are installed on both sides of the outer surface of the outer frame, and the auxiliary straps have an arc-shaped structure.

[0011] Furthermore, a combined tube is threaded onto one end of the sampling tube, and a protective component for auxiliary protection is provided on one side of the outer frame.

[0012] Furthermore, the protective assembly includes a connecting plate, a rotating shaft, a baffle, and a magnetic suction plate. The connecting plate has a rotating shaft rotatably mounted inside it, the outer surface of the rotating shaft is provided with a baffle, and a magnetic suction plate is fixedly mounted on one side of the baffle. The magnetic suction plate is magnetically connected to the outer frame.

[0013] This invention provides a scalable sampling air quality detection device, which has the following advantages: 1. This invention adopts a negative pressure sampling design. A vacuum pump is used to create a stable negative pressure in the detection frame. The atmospheric pressure difference allows the air sample to enter the detection frame quickly and without interference. The coordinated control of electric valves one and two can seal and isolate the sample to prevent it from mixing with the outside air. Combined with a sensor module composed of a laser scattering sensor and a PID photoionization sensor, it can accurately detect the concentration of particulate matter and harmful gases such as VOCs, ensuring the accuracy and authenticity of sampling and detection data in all aspects.

[0014] 2. This invention uses a hydraulic rod to drive the connecting plate to extend and retract the detection frame along the outer frame, which can flexibly adjust the sampling height and position. Combined with the combined pipe with the threaded connection at the end of the sampling tube, the sampling path can be extended according to the sampling distance requirements, adapting to sampling scenarios in different target areas. The protective component adopts a follow-up opening design, which can automatically push the baffle to release the magnetic attraction and open synchronously when the detection frame extends and retracts, without the need for manual operation.

[0015] 3. The present invention uses a protective component baffle that can fit tightly against the outer frame via a magnetic plate when not sampling, effectively blocking the sampling tube port and preventing dust, water, and impurities from entering. This protects the sampling tube, detection module, and other core components from damage. After the test is completed, the vacuum pump can extract the residual gas in the detection frame through the extraction tube, achieving rapid cleaning of the detection frame and avoiding interference from residual samples with the next test result, thus ensuring the continuity of testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a scalable sampling air quality detection device according to the present invention; Figure 2 This is a schematic diagram of the structure of a scalable sampling air quality detection device according to the present invention from another perspective; Figure 3 This is a schematic diagram of the vacuum pump connection structure of a retractable sampling air quality detection device according to the present invention; Figure 4This is a schematic diagram of the detection frame structure of a scalable sampling air quality detection device according to the present invention; Figure 5 This is a schematic diagram of a partial connection structure inside the outer frame of a retractable sampling air quality detection device according to the present invention. In the diagram: 1. Outer frame; 2. Fixing assembly; 201. Fixing plate; 202. Threaded rod; 203. Adjusting plate; 3. Auxiliary belt; 4. Detection frame; 5. Protective assembly; 501. Connecting plate; 502. Rotating shaft; 503. Baffle; 504. Magnetic suction plate; 6. Sampling tube; 7. Combination tube; 8. Electric valve one; 9. Detection module; 10. Electric valve two; 11. Suction pipe; 12. Vacuum pump; 13. Sensor module; 14. Clamping plate; 15. Connecting plate; 16. Hydraulic rod. Detailed Implementation

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0018] like Figures 1-5As shown, a retractable sampling air quality detection device includes an outer frame 1, a fixing component 2, a fixing plate 201, a threaded rod 202, an adjusting plate 203, an auxiliary belt 3, a detection frame 4, a protective component 5, a connecting plate 501, a rotating shaft 502, a baffle 503, a magnetic suction plate 504, a sampling tube 6, a combined tube 7, an electric valve 1 8, a detection module 9, an electric valve 2 10, an extraction pipe 11, a vacuum pump 12, a sensor module 13, a clamping plate 14, a connecting plate 15, and a hydraulic rod 16. The detection module 9 is installed inside the detection frame 4, and the sensor module 13 is installed at the bottom of the detection module 9. The outer frame 1 is installed outside the detection frame 4, and the interior of the outer frame 1 has a hollow structure. Auxiliary straps 3 are installed on both sides of the outer surface of frame 1, and the auxiliary straps 3 are arc-shaped. The arc-shaped auxiliary straps 3 installed on both sides of the outer surface of frame 1 can help the operator carry the device, or further reinforce the device with the fixing component 2, so as to avoid the device shaking during the sampling and detection process and affect the data accuracy. It is also beneficial to collect gas at different depths at the same height. A clamping plate 14 is installed inside the outer frame 1, and one side of the inner side of the outer frame 1 is fixedly connected to the hydraulic rod 16. The connecting plate 15 is slidably set on the inner surface of the outer frame 1. A suction pipe 11 is provided at one end of the detection frame 4, and a vacuum pump 12 is provided at one end of the suction pipe 11. A sampling pipe 6 is installed at the other end of the detection frame 4, and an electric valve is provided on one side of the inner side of the sampling pipe 6. A connecting plate 15 is installed at the bottom of the detection frame 4, and a hydraulic rod 16 is installed at the bottom of the connecting plate 15. The electric valve 10 between the detection module 9 and the suction pipe 11 is opened by the controller, and the vacuum pump 12 installed at one end of the suction pipe 11 is started. The vacuum pump 12 performs vacuuming treatment inside the detection frame 4 through the suction pipe 11. Since the detection frame 4 is sealed with the outer frame 1, the sampling tube 6 and the suction pipe 11, a stable negative pressure can be formed inside the detection frame 4 during the vacuuming process. When the internal negative pressure value of the detection frame 4 is reached, the vacuum pump 12 and the electric valve 10 are closed to maintain the negative pressure state inside the detection frame 4. Then the electric valve 8 is opened, and at this time the internal negative pressure of the detection frame 4 is negative. The outside is at normal atmospheric pressure, creating a significant atmospheric pressure difference. Air from the target area, under this pressure difference, passes sequentially through the combined pipe 7, the sampling pipe 6, and the electric valve 8 into the detection frame 4, completing the air sample collection. After collection, the controller immediately closes the electric valve 8, sealing the air sample inside the detection frame 4 to prevent mixing with outside air and ensure accurate detection data. Once the sample is sealed, the detection module 9 inside the detection frame 4 is activated. The sensor module 13 installed at the bottom of the detection module 9, specifically a laser scattering sensor and a PID photoionization sensor, directly contacts the air sample inside the detection frame 4. The laser scattering sensor is responsible for detecting PM2.5 in the sample.5. PM10 and other particulate matter concentration: The PID photoionization sensor is responsible for detecting the concentration of harmful gases such as VOCs in the sample. After detection, the electric valve 10 is opened, and the vacuum pump 12 is started to extract the detected gas from the detection frame 4 through the extraction pipe 11, completing the cleaning of the detection frame 4.

[0019] like Figure 1 As shown, a fixing component 2 for auxiliary fixation is installed at the bottom of the outer frame 1. The fixing component 2 includes a fixing plate 201, a threaded rod 202, and an adjusting plate 203. The threaded rod 202 is rotatably mounted inside the fixing plate 201, and the adjusting plate 203 is externally threaded at one end of the threaded rod 202. The adjusting plate 203 is slidably disposed at the bottom of the outer frame 1. Both the outer surfaces of the fixing plate 201 and the adjusting plate 203 are provided with a rubber layer. The device is stably fixed by the fixing component 2 installed at the bottom of the outer frame 1. 2 consists of a fixed plate 201, a threaded rod 202, and an adjusting plate 203. The operator can rotate the threaded rod 202, which is rotatably installed inside the fixed plate 201. Since the adjusting plate 203 is threadedly connected to the threaded rod 202 and slidably disposed at the bottom of the outer frame 1, the rotation of the threaded rod 202 will drive the adjusting plate 203 to slide along the bottom of the outer frame 1 until the fixed plate 201 and the adjusting plate 203 cooperate to clamp the fixing surface. At the same time, the rubber layer on the outer surface of the fixed plate 201 and the adjusting plate 203 can increase the friction and improve the fixing stability.

[0020] like Figure 1 , Figure 2 and Figure 4As shown, a combined pipe 7 is threaded onto one end of the sampling tube 6. A protective component 5 for auxiliary protection is provided on one side of the outer frame 1. The protective component 5 includes a connecting plate 501, a rotating shaft 502, a baffle 503, and a magnetic suction plate 504. The rotating shaft 502 is rotatably mounted inside the connecting plate 501. The baffle 503 is provided on the outer surface of the rotating shaft 502. A magnetic suction plate 504 is fixedly mounted on one side of the baffle 503. The magnetic suction plate 504 is magnetically connected to the outer frame 1. When the hydraulic rod 16 extends or retracts, it drives the connecting plate 15 to slide along the inner surface of the hollow outer frame 1, thereby driving the detection frame 4 to extend or retract synchronously, realizing flexible adjustment of the sampling position. When the hydraulic rod 16 drives the detection frame 4 to extend or retract outward, the end of the detection frame 4 will synchronously touch the baffle 503 of the protective component 5. With the thrust of the moving detection frame 4, the magnetic suction plate 504 on one side of the baffle 503 can be demagnetized from the outer frame 1, thereby driving the baffle 504 to extend or retract. The 503 rotates and opens synchronously with the movement of the detection frame 4 around the pivot 502, realizing the follow-up opening of the protective component 5. The detection frame 4 is adjusted to the target sampling position under the drive of the hydraulic rod 16. At this time, the baffle 503 and the magnetic suction plate 504 have moved with the detection frame 4 and are pushed open around the pivot 502. The sampling tube 6 installed at the other end of the detection frame 4 is exposed synchronously. There is no need to manually operate the protective component 5. The protective component 5 consists of a connecting plate 501, a pivot 502, a baffle 503 and a magnetic suction plate 504. The pivot 502, which is rotatably installed inside the connecting plate 501, provides support for the follow-up rotation of the baffle 503. The magnetic connection between the magnetic suction plate 504 and the outer frame 1 can automatically reset and seal when the detection frame 4 is retracted. At the same time, according to the sampling distance requirements, the sampling path can be extended by the combination pipe 7 threaded on one end of the sampling tube 6 to ensure that the sampling tube 6 can be accurately aligned with the target sampling area, preparing for subsequent gas sampling.

[0021] In summary, this extendable sampling air quality detection device firstly... Figures 1-5The structure shown, in use, achieves stable fixation of the device through the fixing component 2 installed at the bottom of the outer frame 1. The fixing component 2 consists of a fixing plate 201, a threaded rod 202, and an adjusting plate 203. The operator can rotate the threaded rod 202 rotatably installed inside the fixing plate 201. Since the adjusting plate 203 is threadedly connected to the threaded rod 202 and slidably disposed at the bottom of the outer frame 1, the rotation of the threaded rod 202 will drive the adjusting plate 203 to slide along the bottom of the outer frame 1 until the fixing plate 201 and the adjusting plate 203 cooperate to clamp the fixing surface. At the same time, the rubber layer on the outer surface of the fixing plate 201 and the adjusting plate 203 can increase the friction and improve the fixing. For stability, the arc-shaped auxiliary straps 3 installed on both sides of the outer surface of the outer frame 1 can assist the operator in carrying the device, or further reinforce the device with the fixing component 2, avoiding the device shaking during sampling and detection and affecting data accuracy. This is beneficial for collecting gas at different depths at the same height. After the device is fixed, the hydraulic rod 16 set at the bottom of the connecting plate 15 is activated according to the height or distance requirements of the target sampling area. Since the hydraulic rod 16 is fixedly connected to one side of the inner side of the outer frame 1, and the connecting plate 15 is slidably set on the inner surface of the outer frame 1, and the top and bottom of the detection frame 4 are fixed, the extension and retraction of the hydraulic rod 16 will drive the connecting plate 15 along the hollow structure of the outer frame 1. The inner surface slides, thereby causing the detection frame 4 to extend and retract synchronously, realizing flexible adjustment of the sampling position. When the hydraulic rod 16 drives the detection frame 4 to extend and retract outward, the end of the detection frame 4 will synchronously touch the baffle 503 of the protective component 5. With the thrust of the moving detection frame 4, the magnetic suction plate 504 on one side of the baffle 503 can be demagnetized from the outer frame 1, thereby causing the baffle 503 to rotate synchronously with the movement of the detection frame 4 around the rotating shaft 502, thus realizing the follow-up opening of the protective component 5. The detection frame 4 is adjusted to the target sampling position under the drive of the hydraulic rod 16. At this time, the baffle 503 and the magnetic suction plate 504 have moved with the detection frame 4, and the rotation... With shaft 502 as the center, the sampling tube 6 installed at the other end of the detection frame 4 is simultaneously exposed, without the need for manual operation of the protective component 5. The protective component 5 consists of a connecting plate 501, a rotating shaft 502, a baffle 503, and a magnetic suction plate 504. The rotating shaft 502, which is rotatably installed inside the connecting plate 501, provides support for the rotation of the baffle 503. The magnetic connection between the magnetic suction plate 504 and the outer frame 1 can automatically reset and seal when the detection frame 4 is retracted. At the same time, according to the sampling distance requirements, the sampling path can be extended by the combination pipe 7 threaded on one end of the sampling tube 6 to ensure that the sampling tube 6 can be accurately aligned with the target sampling area, thus preparing for subsequent gas sampling.When not sampling, the hydraulic rod 16 retracts the detection frame 4, the baffle 503 loses the support of the detection frame 4, and the magnetic plate 504 automatically magnetically connects to the outer frame 1. The baffle 503 blocks the port of the sampling tube 6, providing protection against dust, water, and impurities, thus protecting the sampling tube 6 and its internal components. After sampling preparation is completed, the electric valve 8 located on one side inside the sampling tube 6 is closed first. The electric valve 10 between the detection module 9 and the extraction pipe 11 is opened via the controller, and the vacuum pump 12 located at one end of the extraction pipe 11 is started. The vacuum pump 12 pumps air through the extraction pipe 11 into the detection frame 4. The system undergoes a vacuum process. Because the detection frame 4 is sealed to the outer frame 1, sampling tube 6, and extraction tube 11, a stable negative pressure is created inside the detection frame 4 during the vacuuming process. Once the preset negative pressure value is reached, the vacuum pump 12 and electric valve 10 are closed to maintain the negative pressure inside the detection frame 4. Then, electric valve 8 is opened. At this point, the inside of the detection frame 4 is under negative pressure, while the outside is at normal pressure, creating a significant atmospheric pressure difference. Air from the target area will be drawn through the combined tube 7, sampling tube 6, and electric valve 8 into the detection frame 4 under this pressure difference, completing the air sampling process. After the air sample is collected, the electric valve 8 is immediately closed by the controller to seal the air sample inside the detection frame 4, preventing the sample from mixing with the outside air and ensuring accurate detection data. After the sample is sealed, the detection module 9 inside the detection frame 4 is activated. The sensor module 13 installed at the bottom of the detection module 9, specifically a laser scattering sensor and a PID photoionization sensor, will directly contact the air sample inside the detection frame 4. The laser scattering sensor is responsible for detecting the concentration of particulate matter such as PM2.5 and PM10 in the sample, while the PID photoionization sensor is responsible for detecting VOCs in the sample. After the concentration of harmful gases is measured and the test is completed, open the electric valve 10 and start the vacuum pump 12 to extract the gas detected in the detection frame 4 through the extraction pipe 11, thus cleaning the detection frame 4. Then, start the hydraulic rod 16 to retract it, causing the connecting plate 15 and the detection frame 4 to retract into the outer frame 1. Rotate the shaft 502 to close the baffle 503, magnetically fixing the magnetic plate 504 to the outer frame 1. Finally, loosen the threaded rod 202 of the fixing component 2 and adjust the adjusting plate 203 to reset, completing the entire sampling and testing process. The above steps can be repeated for the next sampling and testing as needed.

[0022] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A scalable sampling air quality detection device, comprising a detection frame (4) and a vacuum pump (12), characterized in that, The detection frame (4) is equipped with a detection module (9) inside, and a sensor module (13) is installed at the bottom of the detection module (9). A suction pipe (11) is provided at one end of the detection frame (4), and a vacuum pump (12) is provided at one end of the suction pipe (11). A sampling pipe (6) is installed at the other end of the detection frame (4), and an electric valve (8) is provided on one side inside the sampling pipe (6). A connecting plate (15) is installed at the bottom of the detection frame (4), and a hydraulic rod (16) is provided at the bottom of the connecting plate (15).

2. The scalable sampling air quality detection device according to claim 1, characterized in that, The detection frame (4) is provided with an outer frame (1) on the outside, and the interior of the outer frame (1) is a hollow structure.

3. The scalable sampling air quality detection device according to claim 2, characterized in that, The outer frame (1) is fitted with a card plate (14), and one side of the outer frame (1) is fixedly connected to a hydraulic rod (16), and a connecting plate (15) is slidably disposed on the inner surface of the outer frame (1).

4. The scalable sampling air quality detection device according to claim 2, characterized in that, The bottom of the outer frame (1) is equipped with a fixing component (2) for auxiliary fixing, and the fixing component (2) includes a fixing plate (201), a threaded rod (202) and an adjusting plate (203). The threaded rod (202) is rotatably installed inside the fixing plate (201), and the adjusting plate (203) is provided on the external thread of one end of the threaded rod (202).

5. The scalable sampling air quality detection device according to claim 4, characterized in that, The adjusting plate (203) is slidably disposed at the bottom of the outer frame (1), and the outer surfaces of the fixing plate (201) and the adjusting plate (203) are both provided with a rubber layer.

6. The scalable sampling air quality detection device according to claim 2, characterized in that, The outer frame (1) has auxiliary strips (3) installed on both sides of its outer surface, and the auxiliary strips (3) are arc-shaped.

7. The scalable sampling air quality detection device according to claim 2, characterized in that, One end of the sampling tube (6) is threaded with a combination tube (7), and a protective component (5) for auxiliary protection is provided on one side of the outer frame (1).

8. The scalable sampling air quality detection device according to claim 7, characterized in that, The protective component (5) includes a connecting plate (501), a rotating shaft (502), a baffle (503) and a magnetic suction plate (504). The connecting plate (501) is rotatably mounted with the rotating shaft (502). The outer surface of the rotating shaft (502) is provided with a baffle (503), and a magnetic suction plate (504) is fixedly mounted on one side of the baffle (503).

9. The scalable sampling air quality detection device according to claim 8, characterized in that, The magnetic plate (504) is magnetically connected to the outer frame (1).

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