Quantitative gas sample injection device

Abstract

A quantitative gas sample injection device, comprising a support table (1), recovery monitoring assemblies (4), fixing assemblies (5), and gas sample injection cylinders (6). Two support frames (2) are symmetrically distributed at the top of the support table (1), and gas intake treatment boxes (17) used in conjunction with the gas sample injection cylinders (6) are fixedly connected to the sides of the two support frames (2) close to each other; the recovery monitoring assemblies (4) are mounted on one side of the support table (1) and are symmetrically distributed; the fixing assemblies (5) are mounted at the bottom of the support table (1) and are connected and used in conjunction with the recovery monitoring assemblies (4); the gas sample injection cylinders (6) are mounted at the top of the support table (1) and are located on one side of the support frames (2), a first connection pipeline (20) is mounted between the two gas sample injection cylinders (6), and two pressure relief pipelines (25) are mounted on one side of the first connection pipeline (20). The device can avoid the problems of gas leakage and extremely high internal gas pressure during detection.

Description

A gas quantitative sampling device Technical Field

[0001] The present invention relates to the technical field of gas processing equipment, and in particular to a gas quantitative sampling device. Background Art

[0002] A gas is a shapeless, volumeless fluid that is compressible and expandable. It is a state of matter. Like liquids, gases are fluids: they can flow and deform. However, unlike liquids, gases have large distances between their molecules, allowing them to be compressed and expanded. Without restraint (a container or force field), gases can expand, and their volume is unlimited. The atoms or molecules of a gaseous substance are free to move relative to one another. The kinetic energy of the atoms or molecules of a gaseous substance is relatively high. The state of a gas can be influenced by its volume, temperature, and pressure. These factors contribute to the various gas laws, which in turn influence each other.

[0003] When processing the gas, a sampling operation is required.

[0004] In the prior art, no leak detection component is set after the gas is sampled, which may lead to gas leakage. On the one hand, it affects the normal processing of the gas, and on the other hand, it is easy to cause varying degrees of damage to the on-site equipment. At the same time, no quantitative gas intake equipment is set, which may lead to the problem of excessive internal gas pressure during detection, resulting in varying degrees of safety hazards and unable to meet the requirements of normal use. Therefore, the present invention needs to design a gas quantitative sampling device to solve the above-mentioned problems. Technical issues

[0005] The purpose of the present invention is to provide a gas quantitative sampling device to solve the problem proposed in the above background technology that after the gas is sampled, a leak detection component is not set, which may lead to gas leakage. On the one hand, it affects the normal processing of the gas, and on the other hand, it is easy to cause varying degrees of damage to the on-site equipment. At the same time, the quantitative gas intake equipment is not set, which may lead to the problem of excessive internal gas pressure during detection, resulting in varying degrees of safety hazards and the inability to meet the requirements of normal use. Technical Solutions

[0006] In order to achieve the above technical features, the purpose of the present invention is achieved as follows:

[0007] A gas quantitative sampling device comprises a support platform, a recovery monitoring component, a fixing component, and a gas sampling cylinder;

[0008] Two groups of support frames are symmetrically distributed on the top of the support platform, and a support side plate is installed on the top of each group of support frames. An air intake processing box used in conjunction with a gas sampling cylinder is fixedly connected to the side close to the two groups of support frames. The interior of the air intake processing box is installed with an injection assembly, and the injection assembly includes a filter inner chamber and a delivery pipe. The interior of the air intake processing box is fixedly connected to a filter inner chamber extending to the outside, and one side of the filter inner chamber is fixedly connected to a gas density sensor, and both sides of the gas density sensor are fixedly connected to the delivery pipe;

[0009] The recycling monitoring assembly is installed on one side of the support platform and is symmetrically distributed. The recycling monitoring assembly includes a connecting plate and a mounting base plate. A symmetrically distributed connecting plate is installed on one side of the support platform, and the bottom of each connecting plate is fixedly connected to the mounting base plate.

[0010] The fixing assembly is installed at the bottom of the support platform and is used in conjunction with the recovery monitoring assembly;

[0011] The gas injection tube is installed on the top of the support platform and located on one side of the support frame. A first connecting pipe is installed between the two gas injection tubes, and two pressure relief pipes are installed on one side of the first connecting pipe.

[0012] The fixing assembly includes a mounting bracket and a supporting inclined plate. A symmetrically distributed mounting bracket is installed at the bottom of the support platform and on one side of the mounting base plate. A connecting side plate is installed on the side of the mounting bracket away from the mounting base plate. A supporting inclined plate is installed between the connecting side plate and the mounting bracket. The bottom of the connecting side plate is threadedly connected to a first positioning bolt that is equidistantly distributed and extends to the bottom of the support platform. One side of the mounting bracket is threadedly connected to a second positioning bolt that extends to the inside of the mounting base plate. A cavity is opened inside the mounting bracket, and a second positioning bolt with the same structure and extending to the inside of the mounting base plate is installed inside the cavity.

[0013] A second pipe is installed between the filter inner chamber and the gas injection cylinder, a first pipe is installed between the air intake treatment box and the gas injection cylinder, the other end of the second pipe is connected to the first connecting pipe, the other end of the first pipe is fixedly connected to the second connecting pipe below the support platform, and the bottom of the second connecting pipe is installed with symmetrically distributed air intake pipes.

[0014] A telescopic slide is installed on the side of the connecting plate away from the support platform, and the top of the telescopic slide is fixedly connected to a symmetrically distributed gas recovery pipeline. A symmetrically distributed buzzer is fixedly connected to the top of the telescopic slide and located between the two gas recovery pipelines. Two flanges are sleeved on the outside of the gas sampling cylinder, and a limit seat is installed on the bottom of the gas sampling cylinder. A gas quality sensor is installed inside the telescopic slide.

[0015] A positioning frame is installed at the bottom of the second pipe and below the support platform. The interior of the positioning frame is threadedly connected to a third positioning bolt that extends into the interior of the support platform and is symmetrically distributed. The interior of the positioning frame is threadedly connected to a third positioning bolt that extends into the interior of the limit seat and is symmetrically distributed.

[0016] Two reinforcement mounting plates are fixedly connected to the top of the support platform and located on the side of the second connecting pipe away from the gas sampling cylinder. The tops of the reinforcement mounting plates are fixedly connected to air pumps, and the output ends of the air pumps are connected to the inside of the second connecting pipe.

[0017] A battery is installed inside the supporting side plate and on one side of the filter inner compartment, and a first valve is fixedly connected to the outside of the delivery pipeline.

[0018] A sealing top cover is installed on the top of each gas sampling cylinder, two symmetrically distributed second valves are fixedly connected to the outer side of each first connecting pipe, and a third valve is installed on the outer side of each air inlet pipe.

[0019] The bottom of the support platform is fixedly connected with support feet on all sides, and the bottom of the support feet is fixedly connected with an anti-slip base.

[0020] A control panel is fixedly connected to one side of the support side panels away from the air intake processing box, and the battery, gas density sensor, first valve, buzzer, air pump, second valve and third valve are all electrically connected to the control panel. Beneficial effects

[0021] 1. The present invention is provided with an air pump and an injection assembly. When in use, the control panel is opened, the third valve is opened, air is taken in through the air intake pipe, delivered to the inside of the first pipe through the second connecting pipe, delivered to the inside of the air intake treatment box through the first pipe, the first valve is opened, and the air is recovered to the inside of the filter inner bin through the delivery pipe. During recovery, the delivery amount is detected by the gas density sensor. During injection, the delivery amount is controlled, the air is delivered to the inside of the first connecting pipe through the second pipe, delivered to the inside of the gas injection cylinder through the first connecting pipe, and subsequent gas treatment is carried out. The gas is delivered to the emergency brake through the second valve and discharged through the support frame fixing assembly, thereby achieving normal operation of the whole.

[0022] 2. The present invention is provided with a recovery monitoring component and a fixing component. When installing and using, the connecting plate is aligned with one side of the support platform for installation, and the mounting frame is aligned with the bottom of the support platform and one side of the mounting base plate. The first positioning bolt is used to cooperate with the connecting side plate and the support platform for positioning and installation, and the second positioning bolt is used to cooperate with the mounting frame and the mounting base plate for positioning and installation. The stability of the equipment is improved by installing a supporting inclined plate, which is convenient for the installation and separation of the recovery monitoring component as a whole, and normal maintenance is carried out, which reduces the labor intensity. The gas at the working site is regularly recovered and processed through the gas recovery pipeline. After detection by the gas quality sensor installed inside the telescopic slide, when the detection value exceeds the set value, an early warning is performed through the buzzer to remind the staff to cooperate with the discharge in time, thereby avoiding gas leakage, which not only ensures the subsequent gas processing efficiency including various gas treatments, but also performs different operations according to the requirements of use. Since harmful gases are recovered, the contact time of harmful gases with on-site equipment is reduced, thereby avoiding different degrees of corrosion and damage to the equipment at the working site and extending the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and examples.

[0024] FIG1 is a front view of the structure of a gas quantitative sampling device provided by an embodiment of the present invention;

[0025] FIG2 is a side view of the overall structure of a gas quantitative sampling device provided by an embodiment of the present invention;

[0026] FIG3 is an enlarged view of the structure of a recycling monitoring component provided by an embodiment of the present invention;

[0027] FIG4 is an enlarged view of the fixing assembly structure provided by an embodiment of the present invention;

[0028] FIG5 is an enlarged view of the structure of the sample injection assembly provided in an embodiment of the present invention;

[0029] FIG6 is an enlarged view of a portion A in FIG1 provided by an embodiment of the present invention;

[0030] FIG7 is an enlarged view of a portion B in FIG1 provided by an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Support platform; 2. Support frame; 3. Support side panels;

[0033] 4. Recovery monitoring assembly; 41. Connecting plate; 42. Telescopic slide; 43. Gas recovery pipe; 44. Installation base plate;

[0034] 5. Fixing assembly; 51. Mounting frame; 52. Supporting inclined plate; 53. Connecting side plate; 54. First positioning bolt; 55. Second positioning bolt;

[0035] 6. Gas sampling tube; 7. First pipeline; 8. Second pipeline;

[0036] 9. Sampling assembly; 91. Filter chamber; 92. Battery; 93. Gas density sensor; 94. Delivery pipeline; 95. First valve;

[0037] 10. Positioning frame; 11. Third positioning bolt; 12. Support foot; 13. Anti-slip base; 14. Buzzer; 15. Reinforced mounting plate; 16. Air pump; 17. Air intake treatment box; 18. Sealing top cover; 19. Control panel; 20. First connecting pipe; 21. Second valve; 22. Second connecting pipe; 23. Air intake pipe; 24. Third valve; 25. Pressure relief pipe. Modes for Carrying Out the Invention

[0038] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0039] 1-7 , a gas quantitative sampling device includes a support platform 1 , a recovery monitoring component 4 , a fixing component 5 , and a gas sampling cylinder 6 ;

[0040] Two groups of support frames 2 are symmetrically distributed on the top of the support platform 1, and a supporting side plate 3 is installed on the top of each group of support frames 2. An air intake processing box 17 used in conjunction with the gas sampling tube 6 is fixedly connected to the side of the two groups of support frames 2. The interior of the air intake processing box 17 is installed with an injection assembly 9, and the injection assembly 9 includes a filter inner chamber 91 and a delivery pipe 94. The interior of the air intake processing box 17 is fixedly connected to the filter inner chamber 91 extending to the outside, and one side of the filter inner chamber 91 is fixedly connected to a gas density sensor 93, and both sides of the gas density sensor 93 are fixedly connected to a delivery pipe 94;

[0041] The recovery monitoring assembly 4 is installed on one side of the support platform 1 and is symmetrically distributed. The recovery monitoring assembly 4 includes a connecting plate 41 and a mounting base plate 44. A symmetrically distributed connecting plate 41 is installed on one side of the support platform 1, and the bottom of the connecting plate 41 is fixedly connected to the mounting base plate 44;

[0042] The fixing component 5 is installed at the bottom of the support platform 1 and is used in conjunction with the recovery monitoring component 4;

[0043] The gas injection tube 6 is installed on the top of the support platform 1 and located on one side of the support frame 2. A first connecting pipe 20 is installed between the two gas injection tubes 6. Two pressure relief pipes 25 are installed on one side of the first connecting pipe 20.

[0044] When the present invention is in use, the control panel 19 is opened, the air pump 16 is running, the third valve 24 is opened, the air is processed during on-site operation through the air intake pipe 23, the air is transported to the inside of the first pipe 7 through the second connecting pipe 22, and then to the inside of the air intake treatment box 17 through the first pipe 7, the first valve 95 is opened, and the air is recovered to the inside of the filter inner chamber 91 through the delivery pipe 94. During recovery, the delivery volume is detected by the gas density sensor 93, and the intake volume is controlled during sampling. The air is transported to the inside of the first connecting pipe 20 through the second pipe 8, and then to the inside of the gas sampling cylinder 6 through the first connecting pipe 20 for subsequent gas processing. The gas is transported to the emergency brake through the second valve 21, and discharged through the support frame 2 fixing component 5, thereby achieving the normal operation of the whole. By aligning the connecting plate 41 with one side of the support platform 1 for installation, aligning the mounting frame 51 with the bottom of the support platform 1 and the side of the mounting base 44, the first positioning bolt 54 is engaged. The connecting side plate 53 is positioned and installed with the support platform 1, and the second positioning bolt 55 is used to cooperate with the mounting frame 51 and the mounting base plate 44 for positioning and installation. The installation of the supporting inclined plate 52 improves the stability of the equipment, facilitates the installation and separation of the recovery monitoring component 4 as a whole, and performs normal maintenance, which reduces the intensity of manual labor. The gas at the work site is regularly recovered and processed through the gas recovery pipe 43. After detection by the gas quality sensor installed inside the telescopic slide 42, when the detection value exceeds the set value, an early warning is performed through the buzzer 14 to remind the staff to cooperate with the discharge in time, thereby avoiding gas leakage, which not only ensures the subsequent gas processing efficiency including various gas treatments, but also performs different operations according to the needs of use. Since the harmful gas is recovered, the contact time of the harmful gas with the on-site equipment is reduced, thereby avoiding different degrees of corrosion and damage to the equipment at the work site and extending the overall service life.

[0045] Further, referring to Figures 1-5, the fixing assembly 5 includes a mounting bracket 51 and a support inclined plate 52. The mounting brackets 51 are symmetrically installed at the bottom of the support platform 1 and on one side of the mounting base plate 44. The mounting brackets 51 are installed on the side away from the mounting base plate 44. The supporting inclined plates 52 are installed between the connecting side plates 53 and the mounting brackets 51. The bottom of the connecting side plates 53 is threadedly connected to first positioning bolts 54 that are equidistantly distributed and extend to the bottom of the support platform 1. One side of the mounting bracket 51 is threadedly connected to a second positioning bolt 55 that extends into the interior of the mounting base plate 44. The interior of the mounting bracket 51 has a cavity, and the interior of the cavity is installed with a second positioning bolt 55 of the same structure that extends into the interior of the mounting base plate 44. The mounting bracket 51 is aligned with the bottom of the support platform 1 and on one side of the mounting base plate 44. The connecting side plates 53 are positioned and installed with the support platform 1 by means of the first positioning bolts 54, and the mounting bracket 51 is positioned and installed with the mounting base plate 44 by means of the second positioning bolts 55. The installation of the support inclined plates 52 improves the stability of the equipment.

[0046] Further, referring to Figures 1, 2, 6, and 7, a second pipe 8 is installed between the filter inner chamber 91 and the gas injection tube 6, a first pipe 7 is installed between the air intake treatment box 17 and the gas injection tube 6, the other end of the second pipe 8 is connected to the first connecting pipe 20, the other end of the first pipe 7 and the bottom of the support platform 1 are fixedly connected to the second connecting pipe 22, the bottom of the second connecting pipe 22 is installed with a symmetrically distributed air intake pipe 23, the other end of the air intake pipe 23 is connected to the outside to cooperate with the air intake. The air is transported to the inside of the first connecting pipe 20 through the second pipe 8, and then to the inside of the gas injection tube 6 through the first connecting pipe 20 for subsequent gas treatment. The gas is transported to the emergency brake through the second valve 21 and discharged through the pressure relief pipe 25, achieving the normal operation of the whole.

[0047] Further, referring to Figures 1-4, a telescopic slide 42 is installed on the side of the connecting plate 41 away from the support platform 1, and the top of the telescopic slide 42 is fixedly connected to a symmetrically distributed gas recovery pipe 43, and the top of the telescopic slide 42 and between the two gas recovery pipes 43 are fixedly connected to a symmetrically distributed buzzer 14, the outer side of the gas sampling tube 6 is sleeved with two flanges, and the bottom of the gas sampling tube 6 is installed with a limit seat, and a gas quality sensor is installed inside the telescopic slide 42. The corresponding sensor is replaced according to the gas requirements during detection to perform gas-assisted detection processing. During installation and use, the connecting plate 41 is aligned with one side of the support platform 1 for installation, the mounting frame 51 is aligned with the bottom of the support platform 1 and the side of the mounting base plate 44, the first positioning bolt 54 is used to cooperate with the connecting side plate 53 and the support platform 1 for positioning and installation, and the second positioning bolt 55 is used to cooperate with the mounting frame 51 and the mounting base plate 44 for positioning and installation. The stability of the equipment is improved by installing the supporting inclined plate 52, which facilitates the installation and separation of the entire recovery monitoring component 4 and normal maintenance, reducing the intensity of manual labor, and regularly recovering and treating the gas at the work site through the gas recovery pipeline 43. After detection by the gas quality sensor installed inside the telescopic slide 42, when the detection value exceeds the set value, an early warning is issued through the buzzer 14 to remind the staff to cooperate with the discharge in time, thereby avoiding gas leakage, thereby ensuring the subsequent gas processing efficiency including various gas treatments, and performing different operations according to the requirements of use. Since the harmful gas is recovered, the contact time of the harmful gas with the on-site equipment is reduced, thereby avoiding different degrees of corrosion and damage to the equipment at the work site and extending the overall service life.

[0048] Further, referring to Figures 1-4, a positioning bracket 10 is installed at the bottom of the second pipe 8 and below the support platform 1. The interior of the positioning bracket 10 is threadedly connected to third positioning bolts 11 that extend into the interior of the support platform 1 and are symmetrically distributed. The interior of the positioning bracket 10 is threadedly connected to third positioning bolts 11 that extend into the interior of the limit seat and are symmetrically distributed. The present invention uses first positioning bolts 54 to connect the side plate 53 to the support platform 1 for positioning and installation, and second positioning bolts 55 to connect the mounting bracket 51 to the mounting base 44 for positioning and installation. The installation of the support inclined plate 52 improves the stability of the equipment.

[0049] Further, referring to Figures 1, 2, 6, and 7, two reinforcement mounting plates 15 are fixedly connected to the top of the support platform 1 and located on the side of the second connecting pipe 22 away from the gas sampling cylinder 6. The tops of the reinforcement mounting plates 15 are fixedly connected to the air pump 16, and the output end of the air pump 16 is connected to the interior of the second connecting pipe 22. The present invention operates the air pump 16, opens the third valve 24, takes in air through the air intake pipe 23, delivers it to the interior of the first pipe 7 through the second connecting pipe 22, and delivers it to the interior of the air intake treatment box 17 through the first pipe 7.

[0050] Further, referring to Figures 1, 2, 5 and 6, a battery 92 is installed inside the supporting side plate 3 and on one side of the filter inner compartment 91, and a first valve 95 is fixedly connected to the outside of the delivery pipe 94, and power supply for the equipment is provided by the battery 92.

[0051] 1, 2, and 7, a sealing cap 18 is installed on the top of each gas injection tube 6, two symmetrically distributed second valves 21 are fixedly connected to the outside of each first connecting pipe 20, and a third valve 24 is installed on the outside of each air inlet pipe 23. The sealing cap 18 is used for sealing.

[0052] Furthermore, referring to FIG. 1 and FIG. 2 , the bottom of the support platform 1 is fixedly connected with support feet 12 on all four sides, and the bottoms of the support feet 12 are fixedly connected with anti-skid bases 13 .

[0053] Furthermore, a control panel 19 is fixedly connected to one side of one of the supporting side panels 3, away from the air intake processing box 17. The battery 92, gas density sensor 93, first valve 95, buzzer 14, air pump 16, second valve 21, and third valve 24 are all electrically connected to the control panel 19. The control panel 19 provides unified control of the battery 92, gas density sensor 93, first valve 95, buzzer 14, air pump 16, second valve 21, and third valve 24, ensuring normal operation of the entire system.

[0054] Sensors measure environmental parameters, convert them into signals, and send them to the controller. The controller receives and processes the signals, generating corresponding control signals based on a pre-set control algorithm. The control signals are transmitted to the actuators through the output module, which converts the control signals into corresponding actions or adjustments, thereby achieving control of the controlled object. At the same time, the sensors continuously provide feedback to the controller, enabling the system to adjust and optimize the control strategy in real time.

Claims

1. A gas quantitative sampling device, characterized in that: It comprises a support platform (1), a recovery monitoring component (4), a fixing component (5), and a gas sampling cylinder (6); Two groups of support frames (2) are symmetrically distributed on the top of the support platform (1), and a support side plate (3) is installed on the top of each group of the support frames (2). An air intake treatment box (17) used in conjunction with a gas injection tube (6) is fixedly connected to the adjacent sides of the two groups of the support frames (2). An injection assembly (9) is installed inside the air intake treatment box (17), and the injection assembly (9) includes a filter inner chamber (91) and a delivery pipeline (94). The inside of the air intake treatment box (17) is fixedly connected to a filter inner chamber (91) extending to the outside, and a gas density sensor (93) is fixedly connected to one side of the filter inner chamber (91), and the two sides of the gas density sensor (93) are fixedly connected to the delivery pipeline (94); The recovery monitoring assembly (4) is installed on one side of the support platform (1) and is symmetrically distributed. The recovery monitoring assembly (4) includes a connecting plate (41) and a mounting base plate (44). The connecting plates (41) are symmetrically distributed and installed on one side of the support platform (1). The bottoms of the connecting plates (41) are fixedly connected to the mounting base plates (44). The fixing component (5) is installed at the bottom of the support platform (1) and is used in conjunction with the recovery monitoring component (4); The gas injection tube (6) is installed on the top of the support platform (1) and is located on one side of the support frame (2). A first connecting pipe (20) is installed between the two gas injection tubes (6), and two pressure relief pipes (25) are installed on one side of the first connecting pipe (20).

2. A gas quantitative sampling device according to claim 1, characterized in that: The fixing assembly (5) comprises a mounting frame (51) and a supporting inclined plate (52); the bottom of the support platform (1) and one side of the mounting base plate (44) are provided with symmetrically distributed mounting frames (51); the side of the mounting frames (51) away from the mounting base plate (44) are provided with connecting side plates (53); the supporting inclined plates (52) are provided between the connecting side plates (53) and the mounting frame (51); the bottom of the connecting side plates (53) are threadedly connected with first positioning bolts (54) which are equidistantly distributed and extend to the bottom of the support platform (1); one side of the mounting frame (51) is threadedly connected with second positioning bolts (55) which extend to the inside of the mounting base plate (44); a cavity is provided inside the mounting frame (51); a second positioning bolt (55) having the same structure and extending to the inside of the mounting base plate (44) is installed inside the cavity.

3. A gas quantitative sampling device according to claim 2, characterized in that: A second pipe (8) is installed between the filter inner chamber (91) and the gas injection tube (6), a first pipe (7) is installed between the air intake treatment box (17) and the gas injection tube (6), the other end of the second pipe (8) is connected to the first connecting pipe (20), the other end of the first pipe (7) and located below the support platform (1) is fixedly connected to a second connecting pipe (22), and symmetrically distributed air intake pipes (23) are installed at the bottom of the second connecting pipe (22).

4. A gas quantitative sampling device according to claim 3, characterized in that: A telescopic slide plate (42) is installed on one side of the connecting plate (41) away from the support platform (1); the top of the telescopic slide plate (42) is fixedly connected to symmetrically distributed gas recovery pipes (43); the top of the telescopic slide plate (42) and between the two gas recovery pipes (43) is fixedly connected to symmetrically distributed buzzers (14); the outer side of the gas injection tube (6) is sleeved with two flanges; the bottom of the gas injection tube (6) is installed with a limit seat; and the inside of the telescopic slide plate (42) is installed with a gas quality sensor.

5. A gas quantitative sampling device according to claim 4, characterized in that: A positioning frame (10) is installed at the bottom of the second pipe (8) and below the support platform (1), and the interior of the positioning frame (10) is threadedly connected to third positioning bolts (11) extending into the interior of the support platform (1) and symmetrically distributed, and the interior of the positioning frame (10) is threadedly connected to third positioning bolts (11) extending into the interior of the limit seat and symmetrically distributed.

6. A gas quantitative sampling device according to claim 5, characterized in that: Two reinforcement mounting plates (15) are fixedly connected to the top of the support platform (1) and located on the side of the second connecting pipe (22) away from the gas injection tube (6), and the tops of the reinforcement mounting plates (15) are fixedly connected to air pumps (16), and the output end of the air pump (16) is connected to the inside of the second connecting pipe (22).

7. A gas quantitative sampling device according to claim 6, characterized in that: A storage battery (92) is installed inside the supporting side plate (3) and on one side of the filtering inner compartment (91), and a first valve (95) is fixedly connected to the outside of the delivery pipeline (94).

8. A gas quantitative sampling device according to claim 7, characterized in that: A sealing top cover (18) is installed on the top of each gas injection tube (6), two symmetrically distributed second valves (21) are fixedly connected to the outside of each first connecting pipe (20), and a third valve (24) is installed on the outside of each air intake pipe (23).

9. A gas quantitative sampling device according to claim 8, characterized in that: The bottom of the support platform (1) is fixedly connected to support feet (12) on all sides, and the bottom of the support feet (12) is fixedly connected to an anti-slip base (13).

10. A gas quantitative sampling device according to claim 9, characterized in that: A control panel (19) is fixedly connected to one side of one of the supporting side panels (3) away from the air intake processing box (17); the battery (92), the gas density sensor (93), the first valve (95), the buzzer (14), the air pump (16), the second valve (21) and the third valve (24) are all electrically connected to the control panel (19).

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