Air detection equipment special for volatile organic compounds

Abstract

The utility model relates to the technical field of air quality detection, and particularly discloses special air detection equipment for volatile organic compounds, which comprises a suction box and a plurality of groups of air inlet pipes, a push head is clamped in the suction box in a sliding manner, and a hydraulic cylinder is arranged on the push head; two groups of one-way valves are arranged on the suction box, one group of one-way valves is connected with a first connecting pipe and a gas chromatograph, the other group of one-way valves is connected with a rotating joint, and the rotating joint is provided with a connecting mechanism for connecting a plurality of groups of gas inlet pipes. The technical problem that the detection efficiency is low due to the fact that a large amount of time needs to be consumed when a worker carries air back after the air is contained in a sealed bottle in a designated area is solved.

Description

Technical Field

[0001] This utility model relates to the field of air quality detection technology, and specifically discloses an air detection device for volatile organic compounds. Background Technology

[0002] Volatile organic compounds (VOCs) in the air pose a significant threat to the environment and human health. VOCs have a wide range of sources, such as industrial emissions, vehicle exhaust, and gasoline evaporation. Long-term exposure to high concentrations of VOCs can lead to respiratory diseases, nervous system damage, and some components may even pose a carcinogenic risk. To ensure the safety of people's lives and property, it is necessary to regularly monitor air quality so that corresponding measures can be taken in a timely manner to improve air quality.

[0003] Greater emphasis is placed on air quality within industrial plant areas because the concentration of volatile organic compounds (VOCs) in the air is typically higher than in other areas. This necessitates increasing the frequency of testing and ensuring that the testing covers the entire plant area. Traditional testing methods require staff to collect air samples in sealed bottles within a designated area and bring them back. However, plant areas are usually quite large, and collecting air samples from various locations within the plant would take a significant amount of time and manpower, resulting in low testing efficiency. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an air detection device specifically for volatile organic compounds, so as to solve the technical problem that it takes a lot of time for staff to collect air in sealed bottles in a designated area and bring it back, resulting in low detection efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an air detection device specifically for volatile organic compounds, comprising a suction box and several sets of air inlet pipes. A pusher head is slidably mounted inside the suction box, and a hydraulic cylinder is installed on the pusher head. The suction box is equipped with two sets of one-way valves. One set of one-way valves is connected to a first connecting pipe and a gas chromatograph, while the other set of one-way valves is connected to a rotary joint. The rotary joint is equipped with a connecting mechanism for connecting the several sets of air inlet pipes. The suction box is connected to a designated area via the connecting mechanism. Then, through the cooperation of the suction box and the pusher head, negative pressure is used to draw air from the designated area into the suction box. The air is then compressed into the gas chromatograph for detection, enabling rapid collection of air from the designated area, thereby reducing air collection time and improving detection efficiency.

[0006] Furthermore, the connecting mechanism includes a fixed sleeve, on which several sets of air intake pipes are fixedly connected; a sealing ring is slidably fitted onto the fixed sleeve, and a second connecting pipe is provided on the sealing ring; the second connecting pipe is connected to the rotary joint, and a rotating component is provided on the second connecting pipe; several sets of filter chambers are formed on the fixed sleeve, and filter components are provided in each of the several sets of filter chambers. The second connecting pipe cooperates with the sealing ring, so that the second connecting pipe can only communicate with one set of air intake pipes, thereby detecting the air in one area and ensuring the accuracy of the detection results.

[0007] Furthermore, the filter assembly includes fixing blocks that are snapped onto the fixing sleeve. Several sets of filter screens are slidably mounted on several sets of fixing blocks, and each set of filter screens is snapped into the filter chamber. The sets of filter screens are horizontally distributed, and the diameter of the filter holes decreases sequentially, with the filter screens closer to the second connecting pipe having smaller filter hole diameters. The filter assembly performs stepped filtration of the air, improving the filtration effect while ensuring the airflow rate.

[0008] Furthermore, the rotating assembly includes a drive motor, the output shaft of which is connected to a gear. A geared ring is provided on the second connecting tube, and the gear meshes with the geared ring. The rotating assembly is used to rotate the second connecting tube, thereby achieving the purpose of automatically adjusting different detection areas.

[0009] Furthermore, several sets of fixing blocks are connected by a linkage mechanism, which includes several sets of mating sleeves, each set of mating sleeves being fixedly connected to several sets of fixing blocks. A connecting ring is fitted onto each fixing sleeve, and the connecting ring contacts the several sets of fixing blocks. A first mating block and a second mating block are fitted onto both ends of each mating sleeve. The first mating block is hinged to the second mating block within an adjacent mating sleeve. An interlocking component is provided between one set of first mating blocks, one set of second mating blocks, and the connecting ring. This connecting mechanism allows for the quick disassembly of the filter screen, facilitating cleaning and replacement by staff.

[0010] Furthermore, the interlocking assembly includes a locking pin. A first connecting block is provided on the first mating block, and a second connecting block is provided on the second mating block. One end of the locking pin passes through the first and second connecting blocks. A first connecting groove is formed on the connecting ring, and the other end of the locking pin is located in the first connecting groove. A locking block passes through the connecting ring, and one end of the locking block is located in the first connecting groove. A second locking groove is formed on the locking pin, and the locking block is engaged in the second locking groove. The interlocking assembly fixes the fixing block to the fixing sleeve and fixes the filter screen inside the filter chamber, ensuring that the filter assembly will not separate from the filter chamber during use.

[0011] Furthermore, the first mating block, the second mating block, and the mating sleeve are all arc-shaped, and several sets of the first mating blocks, several sets of the second mating blocks, and several sets of the mating sleeves form a closed ring. Workers can move one set of mating sleeves, thereby moving several sets of mating sleeves simultaneously, enabling rapid disassembly and assembly of all filter screens.

[0012] The working principle and beneficial effects of this solution are as follows:

[0013] In operation, the operator first connects the area to be tested to the suction box via the control connection mechanism. Then, the hydraulic cylinder drives the pusher head to rise inside the suction box, drawing air in through negative pressure. The pusher head then moves downwards, forcing the gas inside the suction box into the gas chromatograph, where it is analyzed. After the analysis, the connection mechanism is adjusted to connect the suction box to another area to be tested, and the above steps are repeated to analyze the air in the desired area. During testing, the operator does not need to spend time bringing the air back, reducing sampling time. The simple operation allows for quick switching between testing areas, increasing testing efficiency.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0016] Figure 2 This is a partial exploded view of the structure of the embodiment;

[0017] Figure 3 This is an enlarged schematic diagram of region A in the embodiment;

[0018] Figure 4 This is a schematic diagram of the connecting mechanism and the linkage mechanism in the embodiment;

[0019] Figure 5 This is an enlarged schematic diagram of region B in the embodiment.

[0020] Figure 6 This is a schematic diagram of the linkage mechanism in the embodiment;

[0021] Figure 7 This is a cross-sectional view of the connecting mechanism and the linkage mechanism in the embodiment.

[0022] The following components are labeled in the attached diagram: 1. Suction box; 2. Push head; 3. Hydraulic cylinder; 4. Gas chromatograph; 5. First connecting pipe; 6. One-way valve; 7. Rotary joint; 8. Second connecting pipe; 9. Gear ring; 10. Drive motor; 11. Sealing ring; 12. Fixing sleeve; 13. Inlet pipe; 14. Fixing block; 15. Filter screen; 16. First slot; 17. Fixing groove; 18. Limiting block; 19. Sliding groove; 20. Mating sleeve; 21. First mating block; 22. Second mating block; 23. Connecting ring; 24. Locking pin; 25. First connecting groove; 26. Second connecting groove; 27. Locking block; 28. First connecting block; 29. ​​Second connecting block; 30. Filter chamber; 31. Second slot; 32. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method:

[0024] Example

[0025] like Figures 1 to 7 As shown, an air detection device specifically for volatile organic compounds (VOCs) is disclosed, including a suction box 1. A pusher head 2 is slidably mounted inside the suction box 1, with its outer side in close contact with the inner wall 3 of the suction box. At this time, the pusher head 2 is in contact with the bottom of the suction chamber 3. A hydraulic cylinder 3 is mounted on the pusher head 2, with its extension end fixedly connected to the pusher head 2. The fixed end of the hydraulic cylinder 3 is fixedly connected to the detection device by bolts. Two sets of one-way valves 6 are provided on the suction box 1. One set of one-way valves 6 is connected to a first connecting pipe 5, the other end of which is connected to a gas chromatograph 4. Air from the suction box 1 can enter the gas chromatograph 4 through the one-way valves 6 and the first connecting pipe 5. A rotary joint 7 is connected to the other set of one-way valves 6, and a connecting mechanism is provided on the rotary joint 7. Several sets of air inlet pipes 14 are provided on the connecting mechanism, with the other ends of the air inlet pipes 14 located in the area where air detection is required. Figure 1 As shown.

[0026] The connecting mechanism includes a fixed sleeve 13, within which a sealing ring 12 is slidably fitted. A second connecting pipe 8 is mounted on the sealing ring 12, the second connecting pipe 8 being Z-shaped. The other end of the second connecting pipe 8 is connected to a rotary joint 7. A rotating component is mounted on the second connecting pipe 8. Several sets of air intake pipes 14 are fixedly connected to the fixed sleeve 13. Several sets of filter chambers 31 are formed on the fixed sleeve 13, and the air intake pipes 14 are respectively connected to the filter chambers 31. The filter chambers 31 are arranged in a ring on the fixed sleeve 13. The second connecting pipe 8 communicates with one of the filter chambers 31 through the sealing ring 12. Each of the filter chambers 31 contains a filter component, such as... Figure 2 and Figure 4 As shown.

[0027] The rotating assembly includes a drive motor 11, which is bolted to the outer wall of the suction box 1. The output end of the drive motor 11 is connected to a connecting shaft and a gear 10 via a coupling. The connecting shaft and gear 10 are fixedly connected. A gear ring 9 is provided on the second connecting pipe 8, and the gear 10 meshes with the gear ring 9. The gear ring 9 coincides with the axis of the rotary joint 7. Figure 3 As shown.

[0028] The filter assembly includes several sets of filter screens 16. Several sets of first slots 17 are provided on both sides of the filter chamber 31. The two ends of each set of filter screens 16 are respectively secured within the first slots 17. The filter screens 16 are horizontally distributed within the filter chamber 31, with the diameter of their mesh openings increasing and decreasing sequentially. The filter screens 16 closer to the air intake pipe 14 have larger mesh openings, while those closer to the sealing ring 12 have smaller mesh openings. The several sets of filter screens 16 cooperate with each other to achieve a stepped filtration effect. A fixing groove 18 is provided on the fixing sleeve 13, and a fixing block 15 is secured within the fixing groove 18. Several sets of sliding grooves 20 are provided on the fixing block 15. Each set of filter screens 16 is provided with a limiting block 19, which is slidably secured within the sliding groove 20. Figure 4 As shown.

[0029] Several sets of fixed blocks 15 are connected by a linkage mechanism, which includes several sets of mating sleeves 21. Each set of mating sleeves 21 is fixedly connected to a corresponding fixed block 15. A first mating block 22 and a second mating block 23 are respectively fitted onto both ends of each mating sleeve 21. A connecting ring 24 is fitted onto the connecting sleeve, and the inner wall of the connecting ring 24 contacts the fixed block 15. The first mating block 22 is hinged to the second mating block 23 on the adjacent mating sleeve 21. The mating sleeves 21, the first mating blocks 22, and the second mating blocks 23 are all arc-shaped. Several sets of mating sleeves 21, several sets of first mating blocks 22, and several sets of second mating blocks 23 form a closed ring. An interlocking component that engages with the connecting ring 24 is provided between one set of first mating blocks 22 and the adjacent second mating block 23. Figure 6 As shown.

[0030] The interlocking assembly includes a locking pin 25, a first connecting block 29 on a first mating block 22, and a second connecting block 30 on a second mating block 23. The second connecting block 30 is slidably fitted into the first connecting block 29, and the second connecting block 30 and the first connecting block 29 are rotatably connected. One end of the locking pin 25 passes through the first connecting block 29 and the second connecting block 30, and the locking pin 25 is cylindrical. A first connecting groove 26 is formed on the connecting ring 24, and the other end of the locking pin 25 is located in the first connecting groove 26. A second connecting groove 27 is formed on the connecting ring 24, and a locking block 28 passes through the second connecting groove 27. A second locking slot 32 is formed on the locking pin 25, and the locking block 28 is fitted into the second locking slot 32. The locking block 28 is fixedly connected to the connecting ring 24 through the engagement of the locking block 28 and the second locking slot 32. Figure 5 As shown.

[0031] The one-way valve 6, rotary joint 7, and gas chromatograph 4 are all technical means commonly used by those skilled in the art, and their usage and structure are well known to those skilled in the art.

[0032] In practice

[0033] In use, the operator first adjusts the connection mechanism to connect the space to be tested with the second connecting pipe 8 and the suction box 1 through the air inlet pipe 14 and the filter chamber 31. Then, the hydraulic cylinder 3 is activated, and its extension end retracts, causing the push head 2 to move upward. When the push head 2 moves upward, the suction box 1 is under negative pressure. At this time, the air from the area to be tested moves into the suction box 1 through the corresponding air inlet pipe 14, filter chamber 31, second connecting pipe 8, rotary joint 7, and corresponding one-way valve 6, adjusting the pressure inside the suction box 1 to equal atmospheric pressure. The gas inside the suction box 1 is now the air from the area to be tested. When the air passes through the filter chamber 31, the filter assembly filters the air. Then, the operator... The operator restarts hydraulic cylinder 3, extending its telescopic end and driving push head 2 downwards. This forces air from suction box 1 through the corresponding one-way valve 6 and second connecting pipe 8 into gas chromatograph 4, where it is then detected. This method allows for direct suction of air from the area to be tested into gas chromatograph 4. After testing, simply adjust the connection mechanism to connect suction box 1 to another area to be tested, and repeat the above steps to test the air in that area. When testing for organic matter in the air, there is no need for staff to spend time bringing the air back, reducing sampling time and improving testing efficiency.

[0034] When adjusting the connection mechanism, start the drive motor 11. The output end of the drive motor 11 drives the coupling, connecting shaft and gear 10 to rotate. The gear 10 drives the gear ring 9 to rotate. The gear ring 9 drives the second connecting pipe 8 to rotate around the rotary joint 7. The second connecting pipe 8 drives the sealing ring 12 to move within the fixed sleeve 13 until the second connecting pipe 8 is connected to the corresponding filter chamber 31. When air passes through the filter chamber 31, the air passes through several sets of filter screens 16 in sequence. The several sets of filter screens 16 perform stepped filtration of the air. While reducing the burden on the several sets of filter screens 16, it can ensure that the filtration effect is always good and can effectively prevent the problem of poor air circulation caused by the clogging of the filter screens 16.

[0035] After the filter assembly has been used for a period of time, it needs to be cleaned or replaced. When replacing the filter assembly, first move the locking block 28 upwards, causing it to slide within the second connecting groove 27. The locking block 28 first separates from the second groove 32, and then continues to move until it is completely separated from the second connecting groove 27. At this point, the locking pin 25 is released. Then, the operator pulls the mating sleeve 21 to separate the mating block from the fixing groove 18. At the same time, the mating sleeve 21 moves the filter screen 16, causing it to separate from the first groove 17, until the filter screen 16 is completely separated from the filter chamber 31. As the mating sleeve 21 moves, it also moves the first mating block 22 and the second mating block 23. 3. Slide within the mating sleeve 21 to increase the diameter of the ring formed by several sets of mating sleeves 21, several sets of first mating blocks 22, and several sets of second mating blocks 23. Then, the worker separates the locking pin 25 from the first connecting block 29 and the second connecting block 30. Then, the worker pulls the first mating block 22 and the second mating block 23 to pull the linkage mechanism into a straight line, causing several sets of first mating blocks 22 to rotate around the second mating block 23. Then, the worker can move the filter screen 16, causing the limiting block 19 to slide within the sliding groove 20 until the limiting block 19 separates from the sliding groove 20, causing the filter screen 16 to separate from the fixing block 15. The worker then cleans or replaces the filter screen 16.

[0036] When installing the filter screen 16, align the limiting block 19 on the clean filter screen 16 with the sliding groove 20. Then move the filter screen 16 so that the limiting block 19 slides within the sliding groove 20 until the limiting block 19 moves to one end of the sliding groove 20. Then, the worker forms a circular ring with the linkage components, ensuring that the fixing sleeve 13 is inside the ring. Then, the second connecting block 30 is inserted into the first connecting block 29, and the locking pin 25 is inserted into the first connecting block 29 and the second connecting block 30, so that the corresponding first mating block 22 is connected to the second mating block 23. Then, rotate several sets of fixing blocks 15 so that the fixing blocks 15 are aligned with the fixing groove 18 and the filter screen 16 is aligned with the first locking groove 17. Then, move the fixing blocks 15 towards the center of the fixing sleeve 13, driving the first mating block 22. The second mating block 23 slides within the mating sleeve 21, causing the diameter of the annular ring formed by several sets of first mating blocks 22, several sets of second mating blocks 23, and the mating sleeve 21 to decrease. Simultaneously, this moves the filter screen 16 into the filter chamber 31, securing it in the filter groove. Then, the operator rotates the connecting ring 24 to align the locking pin 25 with the first connecting groove 26. The operator then moves the connecting ring 24 horizontally until the locking pin 25 is engaged in the first connecting groove 26, ensuring that the opening of the second locking groove 32 faces the same direction as the first connecting groove 26. The operator then inserts the locking block 28 into the second connecting groove 27. When one end of the locking block 28 is in the first connecting groove 26, it engages in the second locking groove 32, fixing the locking pin 25 to the connecting ring 24. This allows for quick assembly and disassembly of the filter screen 16, facilitating cleaning and replacement, ensuring that the air entering the gas chromatograph 4 is free of impurities, and maintaining the airflow rate.

[0037] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. An air monitoring device dedicated to volatile organic compounds, characterized in that: Including suction box and several groups of air inlet pipe, the sliding card is provided with a push head in the suction box, and a hydraulic cylinder is arranged on the push head; Two groups of one-way valves are arranged on the suction box, one group of the one-way valves is connected with a first connecting pipe and a gas chromatograph, and the other group of the one-way valves is connected with a rotary joint, and the rotary joint is provided with a connecting mechanism for connecting several groups of the air inlet pipe.

2. The volatile organic compound-specific air detection device of claim 1, wherein: The connecting mechanism comprises a fixed sleeve, and several groups of the air inlet pipe are fixedly connected to the fixed sleeve. A sealing ring is slidingly clamped on the fixed sleeve, a second connecting pipe is arranged on the sealing ring, the second connecting pipe is connected with the rotary joint, and a rotating assembly is arranged on the second connecting pipe. A plurality of filter cavities are formed in the fixed sleeve, and a plurality of filter assemblies are arranged in the plurality of filter cavities.

3. The volatile organic compound-specific air testing device of claim 2, wherein: The filter assembly comprises a fixed block, the fixed block is clamped on the fixed sleeve, a plurality of filter nets are slidingly clamped on a plurality of fixed blocks, and the plurality of filter nets are clamped in the filter cavities. The plurality of filter nets are horizontally distributed, and the filter hole diameters decrease in turn, and the filter hole diameter of the filter net closer to the second connecting pipe is smaller.

4. The volatile organic compound-specific air detection device of claim 3, wherein: The rotating assembly comprises a driving motor, the output shaft of the driving motor is connected with a gear, the second connecting pipe is provided with a gear ring, and the gear is engaged with the gear ring.

5. The volatile organic compound-specific air testing device of claim 4, wherein: A plurality of fixed blocks are connected through a linkage mechanism, the linkage mechanism comprises a plurality of matching sleeves, and the plurality of matching sleeves are fixedly connected to the plurality of fixed blocks, respectively. The fixed sleeve is sleeved with a connecting ring, and the connecting ring is in contact with the plurality of fixed blocks. First and second matching blocks are arranged at both ends of the matching sleeve, the first matching block is hinged to the second matching block in the adjacent matching sleeve, and an interlocking assembly is arranged between one group of the first matching blocks, the second matching blocks and the connecting ring.

6. The volatile organic compound-specific air testing device of claim 5, wherein: The interlocking assembly comprises a locking pin, a first connecting block is arranged on the first matching block, a second connecting block is arranged on the second matching block, and one end of the locking pin is arranged in the first and second connecting blocks. A first connecting groove is formed in the connecting ring, the other end of the locking pin is located in the first connecting groove, a clamping block is arranged in the connecting ring, one end of the clamping block is located in the first connecting groove, a second clamping groove is formed in the locking pin, and the clamping block is clamped in the second clamping groove.

7. The volatile organic compound-specific air testing device of claim 6, wherein: The first matching block, the second matching block and the matching sleeve are arc-shaped, and a closed ring is formed between the plurality of first matching blocks, the plurality of second matching blocks and the plurality of matching sleeves.

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