Multifunctional double-channel gas production device

Abstract

The invention discloses a multifunctional double-channel gas production device, and relates to the technical field of environment-friendly sampling. Comprising a gas production box, two symmetrically-arranged gas inlet assemblies are arranged on the gas production box, and collection of different gases is achieved through the two gas inlet assemblies; two symmetrically-arranged support blocks are fixedly installed on the inner side face of the gas collection box, a mixing bottle is fixedly installed between the two support blocks, and two different gases can be conveniently mixed through the mixing bottle. According to the invention, two different gases in the air are respectively extracted into two extraction cylinders with the same mass through two air inlet assemblies, the piston on the lifting plate is pushed in the extraction tube, then the gases with the same mass are uniformly discharged into the mixing bottle, and the lifting plate is lifted as a power source, so that the mixing bottle can be used for mixing the gases with the same mass. And the mixing blades in the mixing assembly are in a position-changing rotating state, so that the flowing speed and the mixing capacity of the two gases are effectively improved, and the two gases are mixed more uniformly and uniformly.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection sampling, in particular to a multifunctional dual-channel gas sampling device. Background Art

[0002] As environmental pollution becomes increasingly serious, environmental protection has become a common concern of the world. It is urgent to protect the environment on which people depend for survival and to carry out in-depth environmental protection work. Environmental monitoring is an important task in environmental protection. Since harmful substances in the air may exist in the form of gaseous compounds such as sulfur dioxide, nitrogen oxides, carbon monoxide, fluoride, chlorine, etc., as well as in the form of phenol and other organic aerosols, or in solid forms such as dust and other different states, sampling is a very important part of atmospheric monitoring and is the first step in determining pollutants in the atmosphere. It is directly related to the credibility of the analysis results.

[0003] Most of the existing dual-channel gas sampling devices collect two different water-soluble gases in the air, mix the collected gases, and then inject the mixed gas into the sample liquid. However, when mixing the two gases, simple mixing methods are usually used, such as static mixing or dynamic mixing. However, these methods may not be able to improve the flow rate and mixing ability of the gas because they may cause problems such as uneven mixing of the gas and unstable gas quality. Therefore, the present invention proposes a multifunctional dual-channel gas sampling device to solve the above-mentioned problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a multifunctional dual-channel gas collection device, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A multifunctional dual-channel gas collection device, comprising a gas collection box, on which two symmetrically arranged gas intake assemblies are provided, and the two gas intake assemblies are used to collect different gases;

[0007] Two symmetrically arranged bracket blocks are fixedly installed on the inner side of the gas sampling box, and a mixing bottle is fixedly installed between the two bracket blocks, through which two different gases can be mixed;

[0008] The gas sampling box is provided with a mixing component inside, through which the two gases in the mixing bottle are quickly mixed;

[0009] A sampling assembly is arranged on the gas sampling box and below the gas inlet assembly, and the mixed gas is injected into the sample through the sampling assembly.

[0010] Preferably, the air intake assembly includes a gas separator fixedly mounted on the upper end surface of the gas collection box and an electric push rod fixedly mounted on the gas collection box, a positioning block is fixedly mounted on the inner side surface of the gas collection box and on the outer side of the bracket block, an extraction pipe is fixedly mounted between the two positioning blocks, a telescopic rod is fixedly connected to the output end of the electric push rod, an end of the telescopic rod away from the electric push rod is fixedly connected to a lifting plate, a push rod is fixedly mounted on the upper end surface of the lifting plate, an end of the push rod away from the lifting plate extends to the interior of the extraction pipe and a piston is fixedly mounted thereon.

[0011] Preferably, the air inlet of the gas separator is fixedly connected to an air inlet pipe, the exhaust port of the gas separator is fixedly connected to a connecting pipe, the end of the connecting pipe away from the gas separator is fixedly connected to a flow guide pipe, the end of the flow guide pipe away from the connecting pipe extends to the interior of the gas collection box and is fixedly connected to the extraction pipe, and the waste outlet of the gas separator is fixedly connected to a waste exhaust pipe.

[0012] Preferably, the extraction pipe is fixedly connected to an exhaust pipe, one end of the exhaust pipe away from the extraction pipe is fixedly connected to a mixing bottle, a first valve is provided on the guide pipe, and a second valve is provided on the exhaust pipe.

[0013] Preferably, the exhaust pipe is fixedly connected to a diverter pipe, an end of the diverter pipe away from the exhaust pipe is fixedly connected to a telescopic hose, an end of the telescopic hose away from the diverter pipe is fixedly connected to a through pipe, an end of the through pipe away from the telescopic hose is fixedly connected to a vertical pipe, the bottom end of the vertical pipe is fixedly connected to a lifting plate, the top end of the vertical pipe extends to the interior of the mixing bottle, and a plurality of air outlet pipes are fixedly connected to the vertical pipe.

[0014] Preferably, the mixing assembly includes a bearing fixedly mounted on a lifting plate, a spiral rod fixedly mounted on the bearing, one end of the spiral rod away from the bearing extending to the interior of the mixing bottle, a mixing blade fixedly mounted on the spiral rod, the mixing blade is located inside the mixing bottle, and the spiral rod is movably connected to the mixing bottle.

[0015] Preferably, the sampling assembly includes a sample bottle detachably mounted on the lower end surface of the gas sampling box and a sampling pump fixedly mounted on the bottom of the gas sampling box, the output end of the sampling pump is fixedly connected to a sample discharge tube, the end of the sample discharge tube away from the sampling pump extends into the sample bottle, the input end of the sampling pump is fixedly connected to a sampling tube, the end of the sampling tube away from the sampling pump extends to the interior of the mixing bottle, and a third valve is provided on the sampling tube.

[0016] Preferably, a through hole is provided on the upper end surface of the lifting plate and on the inner side of the pushing rod, and the diameter of the through hole is larger than the diameter of the sampling tube.

[0017] Preferably, a positioning frame is fixedly mounted on the outer side surface of the gas collection box, and a support plate is fixedly mounted on the lower end surface of the positioning frame.

[0018] Preferably, a limiting slider is fixedly mounted on the side end surface of the lifting plate, and a limiting slide groove used in conjunction with the limiting slider is provided on the inner side surface of the gas collection box, and the limiting slider is slidably connected to the limiting slide groove.

[0019] The present invention provides a multifunctional dual-channel gas collection device. Compared with the prior art, it has the following beneficial effects:

[0020] 1. The present invention drives the lifting plate to descend by the electric push rod in the air intake assembly, and uses the pistons on the two push rods to move in the two extraction pipes respectively, so that the external gas is separated by the gas separator to extract two different gases into two different extraction pipes, and the gases in the two extraction pipes have the same quality. Then, the lifting plate is raised, and the pistons in the two extraction pipes are used to pass the two gases into the mixing bottle through the exhaust pipe, which effectively ensures that the mixed gas has high quality.

[0021] 2. The mixed gas in the present invention is driven by the sampling pump in the sampling assembly to pass the mixed gas through the sampling tube and the sample arrangement tube into two sample bottles respectively, and the two sample bottles are tested and compared by observation to ensure the accuracy and reliability of the test data;

[0022] 3. In the present invention, when the lifting plate is raised, the spiral rod in the mixing assembly will be raised synchronously, and the raised spiral rod will be in a state of lifting and rotating through the bearing and the connection with the mixing bottle, and the mixing blades on the spiral rod will synchronously follow the rotation. The mixing blades whose positions are changed and in a rotating state can effectively improve the flow speed and mixing capacity of the two gases, so that the mixing of the two gases can be more uniform and balanced.

[0023] 4. In the present invention, part of the gas in the extraction tube can be introduced into the telescopic hose through the shunt pipe, and the gas in the telescopic hose will enter the vertical pipe through the through pipe, and will be discharged into the mixing bottle through the air outlet pipe on the vertical pipe. When the lifting plate drives the spiral rod to rise and rotate, the vertical pipe will rise synchronously, and the gas discharged through the air outlet pipe will be stirred by the mixing blades, so as to be quickly dispersed in the mixing bottle, thereby improving the mixing efficiency and effect of the two gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a front cross-sectional view of the gas extraction box in the present invention;

[0026] Figure 3 It is a side sectional view of the gas collection box in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the air intake assembly in the present invention;

[0028] Figure 5 is a cross-sectional view of the mixing bottle of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the mixing component in the present invention;

[0030] Figure 7 for Figure 5 The enlarged view of point A in the middle;

[0031] Figure 8 for Figure 5 Enlarged view of point B in the middle.

[0032] In the figure: 1. gas sampling box; 2. bracket block; 3. mixing bottle; 4. gas separator; 5. electric push rod; 6. positioning block; 7. extraction tube; 8. telescopic rod; 9. lifting plate; 10. push rod; 11. piston; 12. air inlet pipe; 13. connecting pipe; 14. guide pipe; 15. waste pipe; 16. exhaust pipe; 17. first valve; 18. second valve; 19. diverter pipe; 20. telescopic hose; 21. through pipe; 22. vertical pipe; 23. outlet pipe; 24. bearing; 25. screw rod; 26. mixing blade; 27. sample bottle; 28. sampling pump; 29. ​​sample discharge tube; 30. sampling tube; 31. through hole; 32. positioning frame; 33. support plate; 34. limit slider; 35. limit slide groove; 36. third valve. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] See also Figure 1-8The present invention is a multifunctional dual-channel gas collection device, including a gas collection box 1, on which two symmetrically arranged gas intake components are provided, and the collection of different gases is achieved through the two gas intake components. A positioning frame 32 is fixedly installed on the outer side of the gas collection box 1, and a support plate 33 is fixedly installed on the lower end surface of the positioning frame 32. The gas intake component includes a gas separator 4 fixedly installed on the upper end surface of the gas collection box 1 and an electric push rod 5 fixedly installed on the gas collection box 1. The power source of the electric push rod 5 can be installed on the gas collection box to ensure that the electric push rod 5 can be used normally. A positioning block 6 is fixedly installed on the inner side of the gas collection box 1 and on the outer side of the bracket block 2, and an extraction The output end of the electric push rod 5 is fixedly connected with a telescopic rod 8, and the end of the telescopic rod 8 away from the electric push rod 5 is fixedly connected with a lifting plate 9. The upper end surface of the lifting plate 9 is fixedly installed with a push rod 10, and the end of the push rod 10 away from the lifting plate 9 extends to the inside of the extraction pipe 7, and a piston 11 is fixedly installed. The piston 11 is slidably connected with the inner side surface of the extraction pipe 7, and the side end surface of the lifting plate 9 is fixedly installed with a limiting slider 34. The inner side surface of the gas collection box 1 is provided with a limiting slide 35 used in conjunction with the limiting slide 34. The limiting slide 34 is slidably connected with the limiting slide 35. The limiting slide 34 is limitedly slid in the limiting slide 35 by the limiting slide 34 to ensure the stability of the lifting plate 9 when lifting;

[0036] The air inlet of the gas separator 4 is fixedly connected with an air inlet pipe 12, and a filter screen can be arranged at the pipe mouth of the air inlet pipe 12 to prevent external impurities from entering the gas separator 4. The exhaust port of the gas separator 4 is fixedly connected with a connecting pipe 13, and the end of the connecting pipe 13 away from the gas separator 4 is fixedly connected with a guide pipe 14, and the end of the guide pipe 14 away from the connecting pipe 13 extends to the interior of the gas collection box 1 and is fixedly connected with the extraction pipe 7. The waste outlet of the gas separator 4 is fixedly connected with a waste discharge pipe 15, and the extraction pipe 7 is fixedly connected with an exhaust pipe 16, and the end of the exhaust pipe 16 away from the extraction pipe 7 is fixedly connected with the mixing bottle 3, and a first valve 17 is arranged on the guide pipe 14, and a second valve 18 is arranged on the exhaust pipe 16. The function of the gas separator 4 is to separate different gases from the gas in the atmosphere. When separating gases, the gas separator 4 in the present technical solution discharges the designated gas into the mixing bottle 3 as needed, and then discharges the other gases through the waste discharge pipe 15;

[0037] Two symmetrically arranged bracket blocks 2 are fixedly installed on the inner side of the gas sampling box 1, and a mixing bottle 3 is fixedly installed between the two bracket blocks 2, so that two different gases can be mixed conveniently through the mixing bottle 3;

[0038] A sampling assembly is provided on the gas sampling box 1 and below the gas inlet assembly, and the mixed gas is injected into the sample through the sampling assembly. The sampling assembly includes a sample bottle 27 detachably mounted on the lower end surface of the gas sampling box 1 and a sampling pump 28 fixedly mounted on the inner bottom of the gas sampling box 1. The output end of the sampling pump 28 is fixedly connected with a sample discharge tube 29, and the end of the sample discharge tube 29 away from the sampling pump 28 extends into the sample bottle 27. The input end of the sampling pump 28 is fixedly connected with a sampling tube 30, and the end of the sampling tube 30 away from the sampling pump 28 extends to the interior of the mixing bottle 3. A third valve 36 is provided on the sampling tube 30. A through hole 31 is provided on the upper end surface of the lifting plate 9 and on the inner side of the push rod 10. The aperture of the through hole 31 is larger than the diameter of the sampling tube 30. The through hole 31 is used to ensure that the lifting plate 9 will not affect the normal use of the sampling tube 30 when it is lifted or lowered. The detachable installation method can be bolted to thread the sample bottle 27 on the lower end surface of the gas sampling box.

[0039] In this embodiment, the lifting plate 9 is driven down by the electric push rod 5 in the air intake assembly, and the pistons 11 on the two push rods 10 are respectively moved in the two extraction tubes 7, so that the external gas is separated by the gas separator 4 and two different gases are drawn into two different extraction tubes 7. The gases in the two extraction tubes 7 have the same quality. Then, the lifting plate 9 is raised, and the two gases are introduced into the mixing bottle 3 through the exhaust pipe 16 through the pistons 11 in the two extraction tubes 7, effectively ensuring that the mixed gas has high quality. The mixed gas is driven by the sampling pump 28, so that the mixed gas is introduced into the two sample bottles 27 through the sampling tube 30 and the sample arrangement tube 29 respectively. The two sample bottles 27 are tested and compared by observation to ensure the accuracy and reliability of the test data.

[0040] Embodiment 2:

[0041] See also Figure 1-8 On the basis of the first embodiment, a mixing assembly is provided inside the gas sampling box 1, and the two gases in the mixing bottle 3 are quickly mixed through the mixing assembly. The mixing assembly includes a bearing 24 fixedly mounted on the lifting plate 9, and a spiral rod 25 is fixedly mounted on the bearing 24. One end of the spiral rod 25 away from the bearing 24 extends to the inside of the mixing bottle 3. A mixing blade 26 is fixedly mounted on the spiral rod 25. The mixing blade 26 is located inside the mixing bottle 3, and the spiral rod 25 is movably connected to the mixing bottle 3.

[0042] In this embodiment, when the lifting plate 9 is raised, the spiral rod 25 in the mixing assembly will rise synchronously. The raised spiral rod 25 will be in a raised and rotating state through the bearing 24 and the connection with the mixing bottle 3. The mixing blades 26 on the spiral rod 25 will follow the rotation synchronously. The mixing blades 26 that change position and are in a rotating state can effectively improve the flow speed and mixing ability of the two gases, making the mixing of the two gases more uniform and balanced.

[0043] Embodiment three:

[0044] On the basis of the first embodiment, the exhaust pipe 16 is fixedly connected with a shunt pipe 19, and the end of the shunt pipe 19 away from the exhaust pipe 16 is fixedly connected with a telescopic hose 20, and the end of the telescopic hose 20 away from the shunt pipe 19 is fixedly connected with a through pipe 21, and the end of the through pipe 21 away from the telescopic hose 20 is fixedly connected with a vertical pipe 22, the bottom end of the vertical pipe 22 is fixedly connected to the lifting plate 9, the top end of the vertical pipe 22 extends to the interior of the mixing bottle 3, and the vertical pipe 22 is fixedly connected with a plurality of air outlet pipes 23, and when the vertical pipe 22 follows the lifting and lowering of the lifting plate 9, the air outlet pipe 23 on the vertical pipe 22 is always in the mixing bottle 3.

[0045] In this embodiment, part of the gas in the extraction tube 7 can be introduced into the telescopic hose 20 through the diverter pipe 19, and the gas in the telescopic hose 20 will enter the vertical pipe 22 through the through pipe 21, and will be discharged into the mixing bottle 3 through the outlet pipe 23 on the vertical pipe 22. When the lifting plate 9 drives the spiral rod 25 to rise and rotate, the vertical pipe 22 will rise synchronously, and the gas discharged through the outlet pipe 23 will be stirred by the mixing blades 26, so as to be quickly dispersed in the mixing bottle 3, thereby improving the mixing efficiency and effect of the two gases.

[0046] Working principle:

[0047] When in use, the first valve 17 on the flow guide pipe 14 is opened, the second valve 18 on the exhaust pipe 16 is closed, the lifting plate 9 is driven down by the electric push rod 5, and the pistons 11 on the two push rods 10 are respectively moved in the two extraction pipes 7, so that the external gas enters the gas separator 4 through the intake pipe 12, and the gas separator 4 will pass the required gas into the extraction pipe 7 through the connecting pipe 13 and the flow guide pipe 14. At this time, the gases in the two extraction pipes 7 are different, and the gases in the two extraction pipes 7 have the same quality. After the required gas is extracted, the first valve 17 on the flow guide pipe 14 is closed, and the second valve 18 on the exhaust pipe 16 is opened, and then the lifting plate 9 is raised, and the two gases are passed into the mixing bottle 3 through the exhaust pipe 16 through the pistons 11 in the two extraction pipes 7, effectively ensuring that the mixed gas has a high quality;

[0048] When the lifting plate 9 is lifted, the screw rod 25 in the mixing assembly will be lifted synchronously, and the lifted screw rod 25 will be in a lifted and rotating state through the bearing 24 and the connection with the mixing bottle 3, and the mixing blades 26 on the screw rod 25 will follow the rotation synchronously, and the mixing blades 26 with position changes and in a rotating state can effectively improve the flow speed and mixing ability of the two gases, so that the mixing of the two gases is more uniform and balanced, and part of the gas in the extraction pipe 7 can be introduced into the telescopic hose 20 through the shunt pipe 19, and the gas in the telescopic hose 20 will enter the vertical pipe 22 through the through pipe 21, and be discharged into the mixing bottle 3 through the outlet pipe 23 on the vertical pipe 22. When the lifting plate 9 drives the screw rod 25 to lift and rotate, the vertical pipe 22 will be lifted synchronously, and the gas discharged through the outlet pipe 23 will be stirred by the mixing blades 26, so as to be quickly dispersed in the mixing bottle 3, thereby improving the mixing efficiency and effect of the two gases;

[0049] After the gas mixing is completed, the third valve 36 is opened, and then the mixed gas is driven by the sampling pump 28 to pass the mixed gas through the sampling tube 30 and the sample discharge tube 29 into the two sample bottles 27 respectively. The two sample bottles 27 are tested and compared by observation to ensure the accuracy and reliability of the test data.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A multifunctional dual-channel gas collection device, comprising a gas collection box (1), characterized in that: The gas collection box (1) is provided with two symmetrically arranged gas intake assemblies, and the collection of different gases is achieved through the two gas intake assemblies; Two symmetrically arranged bracket blocks (2) are fixedly mounted on the inner side of the gas sampling box (1), and a mixing bottle (3) is fixedly mounted between the two bracket blocks (2), so that two different gases can be mixed conveniently through the mixing bottle (3); The gas collection box (1) is provided with a mixing component inside, and the two gases in the mixing bottle (3) are quickly mixed by the mixing component; A sampling assembly is provided on the gas sampling box (1) and below the gas inlet assembly, and the mixed gas is injected into the sample through the sampling assembly.

2. A multifunctional dual-channel gas collection device according to claim 1, characterized in that: The air intake assembly comprises a gas separator (4) fixedly mounted on the upper end surface of the gas collection box (1) and an electric push rod (5) fixedly mounted on the gas collection box (1); a positioning block (6) is fixedly mounted on the inner side surface of the gas collection box (1) and on the outer side of the bracket block (2); an extraction pipe (7) is fixedly mounted between the two positioning blocks (6); a telescopic rod (8) is fixedly connected to the output end of the electric push rod (5); an end of the telescopic rod (8) away from the electric push rod (5) is fixedly connected to a lifting plate (9); a push rod (10) is fixedly mounted on the upper end surface of the lifting plate (9); an end of the push rod (10) away from the lifting plate (9) extends to the interior of the extraction pipe (7) and a piston (11) is fixedly mounted thereon.

3. A multifunctional dual-channel gas collection device according to claim 2, characterized in that: The air inlet of the gas separator (4) is fixedly connected to an air inlet pipe (12), the air outlet of the gas separator (4) is fixedly connected to a connecting pipe (13), the end of the connecting pipe (13) away from the gas separator (4) is fixedly connected to a flow guide pipe (14), the end of the flow guide pipe (14) away from the connecting pipe (13) extends to the interior of the gas sampling box (1) and is fixedly connected to the extraction pipe (7), and the waste outlet of the gas separator (4) is fixedly connected to a waste discharge pipe (15).

4. A multifunctional dual-channel gas collection device according to claim 3, characterized in that: The extraction pipe (7) is fixedly connected to an exhaust pipe (16), one end of the exhaust pipe (16) away from the extraction pipe (7) is fixedly connected to the mixing bottle (3), the flow guide pipe (14) is provided with a first valve (17), and the exhaust pipe (16) is provided with a second valve (18).

5. A multifunctional dual-channel gas collection device according to claim 4, characterized in that: The exhaust pipe (16) is fixedly connected to a shunt pipe (19), one end of the shunt pipe (19) away from the exhaust pipe (16) is fixedly connected to a telescopic hose (20), one end of the telescopic hose (20) away from the shunt pipe (19) is fixedly connected to a through pipe (21), one end of the through pipe (21) away from the telescopic hose (20) is fixedly connected to a vertical pipe (22), the bottom end of the vertical pipe (22) is fixedly connected to the lifting plate (9), the top end of the vertical pipe (22) extends to the interior of the mixing bottle (3), and a plurality of air outlet pipes (23) are fixedly connected to the vertical pipe (22).

6. A multifunctional dual-channel gas collection device according to claim 1, characterized in that: The mixing assembly comprises a bearing (24) fixedly mounted on a lifting plate (9); a screw rod (25) fixedly mounted on the bearing (24); an end of the screw rod (25) away from the bearing (24) extending to the interior of the mixing bottle (3); a mixing blade (26) fixedly mounted on the screw rod (25); the mixing blade (26) is located inside the mixing bottle (3); and the screw rod (25) is movably connected to the mixing bottle (3).

7. A multifunctional dual-channel gas collection device according to claim 2, characterized in that: The sampling assembly comprises a sample bottle (27) detachably mounted on the lower end surface of the gas sampling box (1) and a sampling pump (28) fixedly mounted on the bottom of the gas sampling box (1); the output end of the sampling pump (28) is fixedly connected to a sample discharge tube (29); one end of the sample discharge tube (29) away from the sampling pump (28) extends into the sample bottle (27); the input end of the sampling pump (28) is fixedly connected to a sampling tube (30); one end of the sampling tube (30) away from the sampling pump (28) extends into the interior of the mixing bottle (3); and a third valve (36) is provided on the sampling tube (30).

8. A multifunctional dual-channel gas collection device according to claim 7, characterized in that: A through hole (31) is provided on the upper end surface of the lifting plate (9) and on the inner side of the pushing rod (10), and the diameter of the through hole (31) is larger than the diameter of the sampling tube (30).

9. The multifunctional dual-channel gas collection device according to claim 1, characterized in that: A positioning frame (32) is fixedly mounted on the outer side surface of the gas collection box (1), and a support plate (33) is fixedly mounted on the lower end surface of the positioning frame (32).

10. The multifunctional dual-channel gas collection device according to claim 1, characterized in that: A limiting slide block (34) is fixedly mounted on the side end surface of the lifting plate (9), and a limiting slide groove (35) for use with the limiting slide block (34) is provided on the inner side surface of the gas collection box (1), and the limiting slide block (34) is slidably connected to the limiting slide groove (35).

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