Multifunctional oil smoke sampling device

Abstract

The invention belongs to the technical field of oil fume sampling, and particularly relates to a multifunctional oil fume sampling device which comprises a Suma tank, the top of the Suma tank is communicated with an integral sampler, the top of the integral sampler is communicated with an EPC electronic flow controller, the two ends of the EPC electronic flow controller are both communicated with gas conveying pipes, and the gas conveying pipes are communicated with a gas pipeline. One end, far away from the EPC electronic flow controller, of one gas conveying pipe is communicated with a filter membrane clamp, a filter membrane is mounted in the filter membrane clamp, and one end, far away from the gas conveying pipe, of the filter membrane clamp is communicated with a cyclone cutting head; sampling gas flows through the main hose and then enters the cyclone cutting head, particulate samples with selected particle sizes are cut out and left on a filter membrane in the filter membrane clamp, enrichment and collection of the particulate samples are achieved, the sampling gas is shunted through the EPC electronic flow controller, one part of the sampling gas enters the shunting end and is directly collected by the Suma tank, and the other part of the sampling gas enters the sampling end. And direct collection of a long-time constant-current volatile gas sample is realized through the integral sampler, and the other part of sampling gas flows through the sampling tube in the sampling clamp, so that enrichment collection of the semi-volatile organic compound is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of oil fume sampling, in particular to a multifunctional oil fume sampling device. Background Art

[0002] In today's rapid urbanization process, the catering industry, as an important part of the urban economy, has not only enriched the citizens' diet, but also become an important source of urban vitality. However, with the vigorous development of the catering industry, the problem of catering fume pollution has become increasingly prominent, becoming a major challenge affecting urban air quality and the quality of life of residents. In Chinese cooking methods, edible oil is usually used at high temperatures. During the high-temperature cooking process, oil and food will produce more than 300 reaction products, including fatty acids, alkanes, alkenes, aldehydes, ketones, alcohols, esters, aromatic compounds, heterocyclic compounds, etc. After the catering fume is discharged, it can be directly condensed to form PM2.5 (fine particulate matter), and the emitted VOCs (volatile organic compounds) are important precursors of ozone and secondary organic aerosols. This is also one of the sources of ozone pollution in summer in recent years, which has serious adverse effects on the environment. Catering fume not only deteriorates air quality through physical and chemical reactions, but also has an impact on human health that cannot be ignored. Exposure to catering fume has pulmonary toxicity, immunotoxicity, genotoxicity and potential carcinogenicity, which will affect the human respiratory system and immune system.

[0003] With the rapid growth of the number of catering companies, the total amount of oil fume emissions continues to increase, and the environmental and health problems it brings are more prominent. Although the existing sampling and analysis methods are highly sensitive, they have limitations and incompleteness, such as difficult operation, high cost, and insufficient applicability to the large-scale and wide-ranging catering industry. The development of some new online monitoring systems has just started, and there are still some problems in their sensitivity, economy, stability, etc. during the application process. At present, the detection of catering oil fume pollution emissions is still in the manual sampling laboratory analysis stage, but due to the complex composition of catering oil fume, the sampling methods and equipment corresponding to different types of targets are very different. Most of the existing sampling equipment is dedicated equipment, and the types of sampling targets are single. The actual manual sampling process is cumbersome and inefficient, and it is impossible to meet the simultaneous collection of particulate matter, semi-volatile organic compounds and volatile organic compounds of multi-channel representative gases in the same period.

[0004] To this end, the present invention provides a multifunctional oil fume sampling device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a multifunctional oil fume sampling device described in the present invention comprises a Summa tank, the top of the Summa tank is connected to an integral sampler, the top of the integral sampler is connected to an EPC electronic flow controller, both ends of the EPC electronic flow controller are connected to air pipes, one end of the air pipe away from the EPC electronic flow controller is connected to a filter membrane clamp, a filter membrane is installed inside the filter membrane clamp, the end of the filter membrane clamp away from the air pipe is connected to a cyclone cutting head, the other end of the cyclone cutting head is connected to a sampling gun head, the end of the sampling gun head away from the cyclone cutting head is connected to a quick connector, the inner sleeve of the quick connector is installed with a main hose, the inner sleeve of the main hose is installed with a skeleton main pipe, the bottom of the skeleton main pipe is connected to a sampling assembly, the other end of the air pipe away from the EPC electronic flow controller is connected to a sampling pipe, the end of the sampling pipe away from the air pipe is connected to a sampling gun tail, the end of the sampling gun tail away from the sampling pipe is connected to a connecting pipe, and the end of the connecting pipe away from the sampling gun tail is connected to a vacuum pump.

[0007] Preferably, the sampling assembly includes a mesh cloth cover, the top of the mesh cloth cover is connected to the all-in-one interface, the top of the all-in-one interface is fixedly connected to one end of the skeleton main pipe, the end of the mesh cloth cover away from the all-in-one interface is fixedly installed with a bottom mesh cloth ring, a plurality of air inlet sampling holes are opened inside the bottom mesh cloth ring, a plurality of sampling hoses are fixedly installed on the top of the bottom mesh cloth ring, one end of the plurality of sampling hoses are respectively connected to the plurality of air inlet sampling holes, and the ends of the plurality of sampling hoses away from the air inlet sampling holes are all connected to one end of the all-in-one interface away from the main hose.

[0008] Preferably, an adjustment component is installed inside the mesh cloth cover, and the adjustment component includes a threaded rod, the outer side of the threaded rod is threadedly connected to a threaded hole block, and the outer side of the threaded hole block is hingedly installed with multiple skeleton rods, and the ends of the multiple skeleton rods away from the threaded hole block are hingedly installed on the top of the bottom mesh cloth ring.

[0009] Preferably, a lower rotating wheel is fixedly mounted on the bottom of the threaded rod, a center plate is fixedly mounted at the center of the bottom mesh cloth ring, and the outer side of one end of the threaded rod fixedly mounted to the lower rotating wheel is fixedly mounted to the center plate via a bearing.

[0010] Preferably, a connecting rotating rod is fixedly installed on the top of the threaded rod, an upper rotating wheel is fixedly installed on the top of the connecting rotating rod, and the upper rotating wheel is rotatably installed inside the all-in-one interface.

[0011] Preferably, a bent connecting plate is fixedly mounted on the outer side of the all-in-one interface, and the upper rotating wheel is located on the inner side of the bent connecting plate.

[0012] Preferably, a sampling clamp is sleeved and installed on the outer side of the sampling tube.

[0013] Preferably, a sealing arc groove is provided on the outer side of the filter membrane clamp, connecting card grooves are provided on both sides of the inner cavity of the sealing arc groove, connecting card blocks are clamped and installed inside the connecting card grooves, a sealing arc block is fixedly installed on the top of the connecting card block, and the sealing arc block is sealingly clamped and installed on the inner side of the sealing arc groove, and the filter membrane is fixedly installed on the inner side of the sealing arc block.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The multifunctional oil fume sampling device described in the present invention controls the internal flow of the sampling gun head and the flow at the shunt end through the EPC electronic flow controller, and opens the integral sampler and the Summa tank at the same time. At this time, the airflow in the sampling channel enters the sampling device through multiple sampling hoses at a set flow rate according to the internal negative pressure of the sampling gun head and the sampling gun tail, and is collected at the all-in-one interface. The sampling gas flows through the main hose and then enters the cyclone cutting head, and the particulate samples of the selected particle size are cut out and retained on the filter membrane inside the filter membrane clamp, so as to achieve the enrichment and collection of the particulate samples. The sampling gas is shunted by the EPC electronic flow controller, and a part of it enters the shunt end and is directly collected by the Summa tank, and the direct collection of the long-term constant-flow volatile gas sample is achieved through the integral sampler, and the other part of the sampling gas continues to flow through the sampling tube in the sampling clamp, so as to achieve the enrichment and collection of semi-volatile organic compounds.

[0016] 2. The multifunctional oil fume sampling device described in the present invention drives the connecting rotating rod to rotate by rotating the upper rotating wheel, thereby driving the threaded rod to rotate. Under the limitation of the skeleton rod, the threaded hole block can be moved up and down on the outside of the threaded rod. When the threaded hole block moves upward, the bottom mesh cloth ring and the mesh cloth sleeve can be pulled by the skeleton rod, so that the sampling component is in a closed state, which is convenient for placing the sampling component in the channel so that the air intake sampling hole and the sampling hose face the airflow direction, and then the mesh cloth sleeve structure is opened by adjusting the component. When the threaded hole block moves downward, the bottom mesh cloth ring and the mesh cloth sleeve can be pushed by the skeleton rod, so that the sampling component is in an expanded state and evenly distributed on the cross-section of the sampling channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a three-dimensional appearance diagram of the present invention;

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 It is a schematic diagram of the three-dimensional upward-looking structure of the present invention;

[0021] Figure 4 It is a schematic diagram of a local enlarged structure in the present invention;

[0022] Figure 5 It is a partial cross-sectional structural schematic diagram of the present invention;

[0023] Figure 6 It is a schematic diagram of a local three-dimensional structure in the present invention;

[0024] In the figure: 1. Summa tank; 2. Integral sampler; 3. Vacuum pump; 4. Connecting pipe; 5. Sampling gun tail; 6. Sampling tube; 7. Sampling clamp; 8. EPC electronic flow controller; 9. Gas pipe; 10. Sampling gun head; 11. Quick connector; 12. Skeleton main pipe; 13. Bending connecting plate; 14. Main hose; 15. All-in-one interface; 16. Upper rotating wheel; 17. Mesh cloth cover; 18. Filter membrane clamp; 19. Cyclone cutting head; 20. Filter membrane; 21. Lower rotating wheel; 22. Center plate; 23. Inlet sampling hole; 24. Bottom mesh cloth ring; 25. Connecting rotating rod; 26. Threaded rod; 27. Threaded hole block; 28. Skeleton rod; 29. ​​Sealing arc block; 30. Push block; 31. Connecting card block; 32. Sealing arc groove; 33. Connecting card groove; 34. Sampling hose. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figures 1 to 6As shown, a multifunctional oil fume sampling device described in an embodiment of the present invention comprises a Summa tank 1, the top of the Summa tank 1 is connected to an integral sampler 2, the top of the integral sampler 2 is connected to an EPC electronic flow controller 8, both ends of the EPC electronic flow controller 8 are connected to an air supply pipe 9, one end of the air supply pipe 9 away from the EPC electronic flow controller 8 is connected to a filter membrane clamp 18, a filter membrane 20 is installed inside the filter membrane clamp 18, the end of the filter membrane clamp 18 away from the air supply pipe 9 is connected to a cyclone cutting head 19, the other end of the cyclone cutting head 19 is connected to a sampling gun head 10, the end of the sampling gun head 10 away from the cyclone cutting head 19 is connected to a quick connector 11, the inner sleeve of the quick connector 11 is installed with a main hose 14, the inner sleeve of the main hose 14 is installed with a skeleton main pipe 12, the bottom of the skeleton main pipe 12 is connected to a sampling assembly, the sampling assembly comprises a mesh cloth cover 17, the top of the mesh cloth cover 17 is connected to an all-in-one interface 15, the top of the all-in-one interface 15 is fixedly connected to one end of the skeleton main pipe 12, the mesh cloth cover 17 is connected to a multi-in-one interface 15, the top of the multi-in-one interface 15 is fixedly connected to one end of the skeleton main pipe 12, A bottom mesh cloth ring 24 is fixedly installed at one end of the cloth cover 17 away from the multi-in-one interface 15, and a plurality of air intake sampling holes 23 are opened inside the bottom mesh cloth ring 24. The number of the air intake sampling holes 23 is six or eighteen. A plurality of sampling hoses 34 are fixedly installed on the top of the bottom mesh cloth ring 24. One end of the plurality of sampling hoses 34 is respectively connected to the plurality of air intake sampling holes 23. One end of the plurality of sampling hoses 34 away from the air intake sampling holes 23 is connected to one end of the multi-in-one interface 15 away from the main hose 14, and the other end of the plurality of sampling hoses 34 is connected to the main hose 14. The end of the gas pipe 9 away from the EPC electronic flow controller 8 is connected to the sampling pipe 6, the outer side of the sampling pipe 6 is sleeved with a sampling clamp 7, the end of the sampling pipe 6 away from the gas pipe 9 is connected to the sampling gun tail 5, the end of the sampling gun tail 5 away from the sampling pipe 6 is connected to the connecting pipe 4, the end of the connecting pipe 4 away from the sampling gun tail 5 is connected to the vacuum pump 3, the sampling gun head 10, the gas pipe 9 and the sampling gun tail 5 are all provided with heating resistors to ensure that the high-temperature oil smoke entering the pipeline will not condense in the pipeline due to the temperature drop;During operation, select a sampling assembly with an appropriate number of air inlet sampling holes 23, connect the sampling gun head 10 part through the cooperation of the quick connector 11 and the main hose 14, select an appropriate cyclone cutting head 19 as needed, install the filter membrane 20 in the filter membrane clamp 18, and install the aged Tenax sampling tube 6, install the integral sampler 2 and the Summa tank 1 on the connecting hose end branched off by the EPC electronic flow controller 8, and then carry out sampling, by closing the mesh cloth cover 17, extend the mesh cloth cover 17 into the channel, so that the air inlet sampling holes 23 and the sampling hose 34 face the airflow direction, and then adjust the assembly to make the mesh cloth cover 17-shaped structure in an open state, and the sampling hose 34 is evenly distributed on the cross-section of the sampling channel according to the limit of the skeleton rod 28 and the soft wire, turn on the vacuum pump 3 to evacuate the air, and control the air flow through the EPC electronic flow controller. The controller 8 controls the internal flow rate of the sampling gun head 10 and the flow rate at the shunt end, and opens the integral sampler 2 and the Summa tank 1 at the same time. At this time, the airflow in the sampling channel enters the sampling device through the multiple sampling hoses 34 according to the set flow rate according to the internal negative pressure of the sampling gun head 10 and the sampling gun tail 5, and is collected at the all-in-one interface 15. The sampling gas flows through the main hose 14 and enters the cyclone cutting head 19, and the granular samples of the selected particle size are cut and left on the filter membrane 20 inside the filter membrane clamp 18, so as to realize the enrichment and collection of the granular samples. The sampling gas is shunted by the EPC electronic flow controller 8, and a part of it enters the shunt end and is directly collected by the Summa tank 1, and the direct collection of the long-term constant flow volatile gas sample is realized through the integral sampler 2, and the other part of the sampling gas continues to flow through the sampling tube 6 in the sampling clamp 7, so as to realize the enrichment and collection of semi-volatile organic compounds. ;

[0027] like Figures 1 to 6As shown, an adjustment component is installed inside the mesh cloth cover 17, and the adjustment component includes a threaded rod 26, the outer side of the threaded rod 26 is threadedly connected to a threaded hole block 27, and the outer side of the threaded hole block 27 is hingedly installed with multiple skeleton rods 28, and the ends of the multiple skeleton rods 28 away from the threaded hole block 27 are hingedly installed on the top of the bottom mesh cloth ring 24, and the bottom of the threaded rod 26 is fixedly installed with a lower rotating wheel 21, and the center of the bottom mesh cloth ring 24 is fixedly installed with a center plate 22, and the outer side of one end of the threaded rod 26 and the lower rotating wheel 21 is fixedly installed with the center plate 22 through a bearing, and the top of the threaded rod 26 is fixedly installed with a connecting rotating rod 25, and the top of the connecting rotating rod 25 is fixedly installed with an upper rotating wheel 16, and the upper rotating wheel 16 is rotatably installed inside the multi-in-one interface 15; when working, the upper rotating wheel 16 can be rotated to drive the connecting rotating rod 25 to rotate The threaded rod 26 is moved, thereby driving the threaded rod 26 to rotate. Under the limitation of the skeleton rod 28, the threaded hole block 27 can be moved up and down on the outside of the threaded rod 26. When the threaded hole block 27 moves upward, the bottom mesh cloth ring 24 and the mesh cloth cover 17 can be pulled by the skeleton rod 28, so that the sampling component is in a closed state, which is convenient for placing the sampling component in the channel, so that the air intake sampling hole 23 and the sampling hose 34 face the airflow direction, and then the mesh cloth cover 17-shaped structure is opened by adjusting the component. When the threaded hole block 27 moves downward, the bottom mesh cloth ring 24 and the mesh cloth cover 17 can be pushed by the skeleton rod 28, so that the sampling component is in an expanded state and evenly distributed on the cross-section of the sampling channel. At the same time, the threaded rod 26 can also be driven to rotate by rotating the lower rotating wheel 21, which is convenient for closing the sampling component more quickly when not collecting.

[0028] like Figures 1 to 6 As shown, a bending connecting plate 13 is fixedly installed on the outer side of the multi-in-one interface 15, and the upper rotating wheel 16 is located on the inner side of the bending connecting plate 13; when working, the setting of the bending connecting plate 13 can ensure that the upper rotating wheel 16 is stably rotated and installed on the inner side of the multi-in-one interface 15, and the setting of the bending connecting plate 13 does not affect the rotation of the upper rotating wheel 16 and will not affect the normal use of the multi-in-one interface 15.

[0029] like Figures 1 to 6As shown, a sealing arc groove 32 is provided on the outer side of the filter membrane clamp 18, and connecting card grooves 33 are provided on both sides of the inner cavity of the sealing arc groove 32, and connecting card blocks 31 are installed inside the connecting card grooves 33, and a sealing arc block 29 is fixedly installed on the top of the connecting card block 31, and the sealing arc block 29 is sealingly installed on the inner side of the sealing arc groove 32, and the filter membrane 20 is fixedly installed on the inner side of the sealing arc block 29; during operation, when the filter membrane 20 needs to be replaced, the push block 30 can be pushed upward to push the connecting card block 31 out from the inside of the connecting card groove 33, and the sealing arc block 29 can be removed from the inside of the sealing arc groove 32, so as to facilitate the replacement of the filter membrane 20, and the filter membrane 20 can be replaced more conveniently and quickly and effectively, further improving the overall filtering effect and performance.

[0030] Working principle: Select a sampling assembly with an appropriate number of air inlet sampling holes 23, connect the sampling gun head 10 part through the cooperation of the quick connector 11 and the main hose 14, select an appropriate cyclone cutting head 19 as needed, install the filter membrane 20 in the filter membrane clamp 18, and install the aged Tenax sampling tube 6. Install the integral sampler 2 and the Summa tank 1 on the end of the connecting hose branched off by the EPC electronic flow controller 8, and then carry out sampling. By closing the mesh cloth cover 17 and extending the mesh cloth cover 17 into the channel, the air inlet sampling holes 23 and the sampling hose 34 are facing the airflow direction, and then the mesh cloth cover 17 structure is opened by adjusting the assembly. The sampling hose 34 is evenly distributed on the cross section of the sampling channel according to the limit of the skeleton rod 28 and the soft wire. Turn on the vacuum pump 3 to evacuate air, and turn on the upper rotating wheel 16 to drive the connecting rotating rod 25 to rotate, thereby driving the threaded rod 26 to rotate. Under the limit of the skeleton rod 28, the threaded holes can be The block 27 moves up and down on the outside of the threaded rod 26. When the threaded hole block 27 moves upward, the bottom mesh cloth ring 24 and the mesh cloth cover 17 can be pulled by the skeleton rod 28, so that the sampling component is in a closed state, which is convenient for placing the sampling component in the channel, so that the air intake sampling hole 23 and the sampling hose 34 face the airflow direction, and then the mesh cloth cover 17-shaped structure is opened by adjusting the component. When the threaded hole block 27 moves downward, the bottom mesh cloth ring 24 and the mesh cloth cover 17 can be pushed by the skeleton rod 28, so that the sampling component is in an expanded state and evenly distributed on the cross-section of the sampling channel. At the same time, the threaded rod 26 can also be driven in by rotating the lower rotating wheel 21. The sampling assembly can be rotated to facilitate faster closing of the sampling assembly when not collecting. The internal flow rate of the sampling gun head 10 and the flow rate at the shunt end are controlled by the EPC electronic flow controller 8. The integral sampler 2 and the Summa tank 1 are opened at the same time. At this time, the airflow in the sampling channel enters the sampling device through multiple sampling hoses 34 according to the negative pressure inside the sampling gun head 10 and the sampling gun tail 5 at the set flow rate, and is collected at the all-in-one interface 15. The sampled gas flows through the main hose 14 and then enters the cyclone cutting head 19. The particle state sample of the selected particle size is cut out and retained on the filter membrane 20 inside the filter membrane clamp 18, so as to realize the enrichment and collection of the particle state sample. The sampled gas is controlled by the EPC electronic flow controller 8. The gas flow is divided by the controller 8, a part of which enters the diversion end and is directly collected by the Summa tank 1, and the direct collection of long-term constant-flow volatile gas samples is realized through the integral sampler 2, and the other part of the sampled gas continues to flow through the sampling tube 6 in the sampling clamp 7 to realize the enrichment and collection of semi-volatile organic compounds. In addition, when the filter membrane 20 needs to be replaced, the push block 30 can be pushed upward to push the connecting card block 31 out of the inside of the connecting card groove 33, and the sealing arc block 29 can be removed from the inside of the sealing arc groove 32, so as to facilitate the replacement of the filter membrane 20, and the filter membrane 20 can be replaced more conveniently, quickly and effectively, and the overall filtering effect and performance are further improved.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multifunctional oil fume sampling device, characterized in that: The invention comprises a Summa tank (1), wherein the top of the Summa tank (1) is connected to an integral sampler (2), the top of the integral sampler (2) is connected to an EPC electronic flow controller (8), both ends of the EPC electronic flow controller (8) are connected to an air supply pipe (9), one end of the air supply pipe (9) away from the EPC electronic flow controller (8) is connected to a filter membrane clamp (18), a filter membrane (20) is installed inside the filter membrane clamp (18), the end of the filter membrane clamp (18) away from the air supply pipe (9) is connected to a cyclone cutting head (19), the other end of the cyclone cutting head (19) is connected to a sampling gun head (10), and the sampling gun head (10) is connected to the sampling gun head (11). 0) is connected to a quick connector (11) at one end away from the cyclone cutting head (19), a main hose (14) is installed in the internal sleeve of the quick connector (11), a skeleton main pipe (12) is installed in the internal sleeve of the main hose (14), and a sampling assembly is connected to the bottom of the skeleton main pipe (12), and another end of the air supply pipe (9) away from the EPC electronic flow controller (8) is connected to a sampling pipe (6), and the end of the sampling pipe (6) away from the air supply pipe (9) is connected to a sampling gun tail (5), and the end of the sampling gun tail (5) away from the sampling pipe (6) is connected to a connecting pipe (4), and the end of the connecting pipe (4) away from the sampling gun tail (5) is connected to a vacuum pump (3).

2. A multifunctional oil fume sampling device according to claim 1, characterized in that: The sampling assembly comprises a mesh cloth sleeve (17), the top of the mesh cloth sleeve (17) is connected to the multi-in-one interface (15), the top of the multi-in-one interface (15) is fixedly connected to one end of the skeleton main pipe (12), the end of the mesh cloth sleeve (17) away from the multi-in-one interface (15) is fixedly installed with a bottom mesh cloth ring (24), a plurality of air intake sampling holes (23) are opened inside the bottom mesh cloth ring (24), a plurality of sampling hoses (34) are fixedly installed on the top of the bottom mesh cloth ring (24), one end of the plurality of sampling hoses (34) is respectively connected to the plurality of air intake sampling holes (23), and the ends of the plurality of sampling hoses (34) away from the air intake sampling holes (23) are all connected to the end of the multi-in-one interface (15) away from the main hose (14).

3. A multifunctional oil fume sampling device according to claim 2, characterized in that: An adjustment component is installed inside the mesh cloth sleeve (17), and the adjustment component comprises a threaded rod (26), the outer side of the threaded rod (26) is threadedly connected to a threaded hole block (27), and the outer side of the threaded hole block (27) is hingedly installed with a plurality of skeleton rods (28), and the ends of the plurality of skeleton rods (28) away from the threaded hole block (27) are hingedly installed on the top of the bottom mesh cloth ring (24).

4. A multifunctional oil fume sampling device according to claim 3, characterized in that: A lower rotating wheel (21) is fixedly mounted at the bottom of the threaded rod (26), a center plate (22) is fixedly mounted at the center of the bottom mesh cloth ring (24), and the outer side of one end of the threaded rod (26) fixedly mounted to the lower rotating wheel (21) is fixedly mounted to the center plate (22) via a bearing.

5. The multifunctional oil fume sampling device according to claim 4, characterized in that: A connecting rotating rod (25) is fixedly mounted on the top of the threaded rod (26), an upper rotating wheel (16) is fixedly mounted on the top of the connecting rotating rod (25), and the upper rotating wheel (16) is rotatably mounted inside the all-in-one interface (15).

6. A multifunctional oil fume sampling device according to claim 5, characterized in that: A bent connecting plate (13) is fixedly mounted on the outer side of the all-in-one interface (15), and the upper rotating wheel (16) is located on the inner side of the bent connecting plate (13).

7. The multifunctional oil fume sampling device according to claim 6, characterized in that: A sampling clamp (7) is sleeved and installed on the outer side of the sampling tube (6).

8. The multifunctional oil fume sampling device according to claim 7, characterized in that: The outer side of the filter membrane clamp (18) is provided with a sealing arc groove (32), and both sides of the inner cavity of the sealing arc groove (32) are provided with connecting card grooves (33), and the interior of the connecting card groove (33) is clamped with a connecting card block (31), and a sealing arc block (29) is fixedly installed on the top of the connecting card block (31), and the sealing arc block (29) is sealingly clamped and installed on the inner side of the sealing arc groove (32), and the filter membrane (20) is fixedly installed on the inner side of the sealing arc block (29).

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