A real-time detection sampling detection mechanism and method for gas pipeline transportation

Abstract

The present invention relates to the field of gas sampling detection technology, and specifically to a real-time detection sampling detection mechanism and method for gas pipeline transportation. The detection mechanism includes a main pipeline, one side of the main pipeline is connected with a sampling tube group and a return pipe, and the outer ring of the main pipeline between the sampling tube group and the return pipe is provided with an instrument ring group, and one side of the sampling tube group is connected with an air conveyor for supplying clean gas. The present invention inserts an internal control barrel into the main pipeline to sample and collect exhaust gas, and detects the sampled exhaust gas through a gas sensor. After the detection is completed, the internal control barrel is withdrawn from the main pipeline, and the air conveyor conveys clean air to the internal control barrel, which then flows to impact the gas sensor to blow away the exhaust gas retained around the gas sensor, so that the reactant in the gas sensor no longer reacts with the exhaust gas, and the gas sensor can get a complete rest.

Description

Technical Field

[0001] The invention relates to the technical field of gas sampling detection, and in particular to a real-time detection sampling detection mechanism and method for gas pipeline transportation. Background Art

[0002] The exhaust gas produced at the end of industrial production needs to be recycled and processed, and the exhaust gas also needs to be sampled and tested. The composition and proportion of the exhaust gas can be analyzed to determine whether the industrial production process is safe and normal. If there is a problem or failure in production, the composition and proportion of the exhaust gas discharged will not meet the specified range. The sampling test is through the contact reaction between the reactant in the gas sensor and the exhaust gas, and the gas sensor transmits an electrical signal. By analyzing the detection data transmitted by the gas sensor, the composition and proportion of the exhaust gas can be analyzed. After the detection is completed, the exhaust gas needs to be separated from the sensor in time, otherwise the exhaust gas and the reactant in the sensor will continue to react, which will invisibly consume the service life of the sensor. Clean air and inert gas can be used to impact the sensor to completely blow away the exhaust gas retained in the sensor. For this purpose, the present invention provides a real-time detection sampling detection mechanism and method for gas pipeline transportation. Summary of the invention

[0003] The object of the present invention is to provide a real-time detection sampling detection mechanism and method for gas pipeline transportation to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a real-time detection sampling detection mechanism for gas pipeline transportation, comprising a main pipeline, one side of the main pipeline is connected with a sampling tube group and a return pipe, and the outer ring of the main pipeline between the sampling tube group and the return pipe is provided with an instrument ring group, the outer ring of the sampling tube group is provided with an outer gear ring, and an inner shaft group is transmission-connected between one end of the outer gear ring and the sampling tube group, and the other end of the outer gear ring is transmission-connected with a main shaft, one side of the sampling tube group is connected with an air conveyor for supplying clean gas, the air conveyor is transmission-connected to the main shaft, and one side of the air conveyor is transmission-connected with a recorder, one end of the recorder is transmission-connected to the instrument ring group, and a one-way air valve is fixed in the return pipe.

[0005] The sampling tube group includes a sampling tube fixedly connected to the main pipeline, an internal control barrel with an internal piston sliding at one end of the sampling tube, an L-shaped flat tube distributed in the internal control barrel, and a straight rack fixed on the L-shaped flat tube. One end of the L-shaped flat tube passes through a side shell of the internal control barrel. A square hole connected to the air supply device is provided on the sampling tube. A plate hole for the sampling gas to enter is provided on the bottom side shell of the internal control barrel. The outer port of the L-shaped flat tube allows the clean gas to enter the internal control barrel by being opposite to the square hole of the sampling tube. The other end of the sampling tube is opposite to the reflux pipe. The main shaft is movably sleeved in the protruding through hole fixed on the outside of the sampling tube, and the main shaft is meshed and connected with the outer gear ring through a fixed cylinder gear.

[0006] The inner shaft group includes a T-shaped shaft plate fixed on the sampling tube shell, and an outer shaft, a transverse shaft and a small worm supported on the T-shaped shaft plate. The transverse shaft passes through a through hole opened on the shell on one side of the sampling tube. One end of the transverse shaft is connected by meshing transmission with a fixed bevel gear and an annular bevel gear fixed on the outer shaft. The other end of the transverse shaft is connected by meshing transmission with a fixed bevel gear and a bevel gear fixed at one end of the small worm. The outer shaft is connected by meshing transmission through an outer gear ring of a fixed gear. The spiral teeth on the small worm are meshed with a spur rack, and the inner edge of the outer gear ring is stuck in an annular groove arranged on the outside of the sampling tube.

[0007] The instrument ring assembly includes a limiting ring tube stuck in an annular groove opened on the outer wall of the main pipeline, an outer ring gear arranged outside the limiting ring tube, a plurality of neck tubes evenly arranged and fixed between the limiting ring tube and the outer ring gear, and a gas sensor fixed in each neck tube, and a neck tube is connected between the sampling tube and the reflux tube.

[0008] The air conveyor comprises a square slot box fixedly covering the square hole of the sampling tube, a concave flat tube with one end fixedly connected to the square slot box, and a wind barrel fixedly connected to the other end of the concave flat tube.

[0009] The air conveyor also includes a fan distributed in the wind barrel, a fan shaft fixed in the middle of the fan, a short control shaft that is vertically transmitted to the main shaft, and a one-way bearing that establishes transmission between the short control shaft and the fan shaft. One end of the short control shaft is meshed and connected with a bevel gear fixed to the end of the main shaft through a fixed bevel gear, and the other end of the short control shaft is fixed with a one-way bearing. The fan shaft is fixed to the outside of the one-way bearing by setting a concave plate, and the fan shaft is movably sleeved in a through hole opened in the middle of the bottom plate of the wind barrel.

[0010] The recorder includes a long worm gear with one end vertically driven by the fan shaft, a spring group driven by the other end of the long worm gear, an intermittent gear meshing and drivingly connected to the outer ring gear, an intermittent shaft for establishing transmission between the intermittent gear and the spring group, and a pressing group for positioning the intermittent shaft. The intermittent shaft is vertically fixed in the middle of the intermittent gear, and the long worm gear is meshing and drivingly connected with the annular bevel gear fixed on the fan shaft through a fixed bevel gear.

[0011] The pressure-generating group includes a control plate frame fixed on the main pipeline, a movable plate sliding through a plate hole opened on the control plate frame, and a C-shaped spring piece with one end resting on the movable plate, the other end of the C-shaped spring piece is fixed on the control plate frame, the intermittent shaft is movably sleeved in a long column hole opened on the control plate frame, one end of the movable plate is inserted into a V-shaped groove opened on the outer wall of the intermittent shaft by setting a pointed end, and the control plate frame is also provided with a round hole for the long worm to movably sleeve.

[0012] The spring group includes a spring fixed on the intermittent shaft, a slow-control ring gear with a fixed sleeve outside the spring, and a concave binding plate fixed on one side of the slow-control ring gear. The intermittent shaft is movably sleeved in a circular hole opened in the middle of the concave binding plate. The slow-control ring gear is meshed with the helical teeth on the long worm.

[0013] A real-time detection sampling method for gas pipeline transportation comprises the following steps:

[0014] Step 1: Sampling test. The main pipeline is used to transport industrial exhaust gas. The internal control barrel is moved and extended into the main pipeline. The exhaust gas in the main pipeline passes through the holes in the internal control barrel plate to impact the inside of the internal control barrel. Then, it is transported through the sampling tube to impact the gas sensor. The gas sensor detects the composition of the exhaust gas. The exhaust gas after detection flows back to the main pipeline through the reflux pipe.

[0015] Step 2: Instrument cleaning. After the exhaust gas detection is completed, the internal control barrel moves and retracts into the sampling tube. Before the internal control barrel moves to the end, the L-shaped flat tube and the air conveyor are connected for a period of time. The air conveyor conveys clean air or inert gas to the L-shaped flat tube, and then injects it into the sampling tube through the internal control barrel. The clean air flow blows away the reaction exhaust gas retained in the gas sensor by impacting the gas sensor.

[0016] Step 3: Instrument replacement. A single sampling test of exhaust gas corresponds to one extension and retraction movement of the internal control barrel. The recorder records the number of extension and retraction times of the internal control barrel. If the number of extension and retraction times exceeds the specified value, it will automatically trigger the detection instrument replacement mechanism in the instrument ring group, and the new gas sensor will be put into subsequent exhaust gas detection.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention inserts an internal control barrel into the main pipeline to sample and collect exhaust gas, and detects the sampled exhaust gas through a gas sensor. After the detection, the internal control barrel is withdrawn from the main pipeline, and the air conveyor conveys clean air to the internal control barrel, which then flows to impact the gas sensor and blows away the exhaust gas retained around the gas sensor, so that the reactant in the gas sensor no longer reacts with the exhaust gas, and the gas sensor can get a complete rest.

[0019] 2. The present invention determines whether the gas sensor needs to be replaced by collecting the number of times the internal control barrel is extended and retracted. If the number of times the internal control barrel is extended and retracted is sufficient, it means that the gas sensor has completed the specified number of detections, and the reaction substance in the gas sensor can no longer fully react with the exhaust gas passing through next time, and the transmitted electrical signal data is not true. Therefore, the recorder is used to accumulate power to control the detection instrument replacement mechanism in the trigger instrument ring group. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 Schematic diagram of the sampling tube group position.

[0022] Figure 3 Schematic diagram of the sampling tube group structure.

[0023] Figure 4 Schematic diagram of the return pipe structure.

[0024] Figure 5 This is a schematic diagram of the instrument ring group structure.

[0025] Figure 6 Schematic diagram of the gas sensor location.

[0026] Figure 7 This is a schematic diagram of the location of the internal control barrel.

[0027] Figure 8 This is a schematic diagram of the air conveyor structure.

[0028] Fig. 9 This is a schematic diagram of the recorder structure.

[0029] Fig.10 It is a schematic diagram of the structure of the compression group.

[0030] Fig.11 This is a schematic diagram of the structure of the clockwork group.

[0031] Fig.12 Schematic diagram of the position of the outer ring gear.

[0032] In the figure: main pipeline 1, sampling tube group 2, reflux pipe 3, instrument ring group 4, outer gear ring 5, inner shaft group 6, main shaft 7, air conveyor 8, recorder 9, one-way air valve 10, spur rack 11, inner control barrel 12, sampling tube 13, L-shaped flat tube 14, outer shaft 15, transverse shaft 16, T-shaped shaft plate 17, small worm 18, outer ring gear 19, gas sensor 20, neck tube 21, limit ring tube 22, electric contact interface 23, fan 24, wind barrel 25, concave flat tube 26, fan shaft 27, one-way bearing 28, short control shaft 29, square groove box 30, spring group 31, pressure group 32, long worm 33, intermittent shaft 34, intermittent gear 35, C-shaped spring 36, movable plate 37, control plate frame 38, concave restraining plate 39, spring 40, slow control ring gear 41. 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 technical solutions in 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] See also Figures 1 to 12 The present invention provides a technical solution: a real-time detection sampling detection mechanism for gas pipeline transportation, comprising a main pipeline 1, a sampling tube group 2 and a return pipe 3 are connected to one side of the main pipeline 1, and an instrument ring group 4 is arranged on the outer ring of the main pipeline 1 between the sampling tube group 2 and the return pipe 3, an outer gear ring 5 is arranged on the outer ring of the sampling tube group 2, and an inner shaft group 6 is transmission-connected between one end of the outer gear ring 5 and the sampling tube group 2, a main shaft 7 is transmission-connected at the other end of the outer gear ring 5, an air conveyor 8 for supplying clean gas is connected to one side of the sampling tube group 2, the air conveyor 8 is transmission-connected to the main shaft 7, and a recorder 9 is transmission-connected on one side of the air conveyor 8, one end of the recorder 9 is transmission-connected to the instrument ring group 4, and a one-way air valve 10 is fixed in the return pipe 3.

[0035] refer to Figure 3 It is understood that the sampling tube group 2 includes a sampling tube 13 fixedly connected to the main pipeline 1, an internal control barrel 12 with an internal piston sliding at one end of the sampling tube 13, an L-shaped flat tube 14 distributed in the internal control barrel 12, and a straight rack 11 fixed on the L-shaped flat tube 14, one end of the L-shaped flat tube 14 passes through a side shell of the internal control barrel 12, a square hole connected to the air supply device 8 is opened on the sampling tube 13, a plate hole for the sampling gas to enter is opened on the bottom side shell of the internal control barrel 12, the outer port of the L-shaped flat tube 14 is opposite to the square hole of the sampling tube 13 to allow the clean gas to enter the internal control barrel 12, the other end of the sampling tube 13 is opposite to the reflux pipe 3, the main shaft 7 is movably sleeved in the protruding through hole fixed on the outside of the sampling tube 13, and the main shaft 7 is meshed and connected with the outer gear ring 5 through a fixed cylinder gear.

[0036] refer to Figure 3 It is understood that the inner shaft group 6 includes a T-shaped shaft plate 17 fixed on the housing of the sampling tube 13, and an outer shaft 15, a transverse shaft 16 and a small worm 18 supported on the T-shaped shaft plate 17. The transverse shaft 16 passes through a through hole opened on the housing of one side of the sampling tube 13. One end of the transverse shaft 16 is connected to the outer shaft 15 through a fixed bevel gear and a ring bevel gear fixed on the outer shaft 15. The other end of the transverse shaft 16 is connected to the bevel gear fixed on one end of the small worm 18 through a fixed bevel gear. The outer shaft 15 is connected by a meshing transmission connection through the fixed gear outer ring 5, the spiral teeth on the small worm 18 are meshed with the spur rack 11, and the inner edge of the outer ring 5 is stuck in the annular groove arranged on the outside of the sampling tube 13. The outer shaft 15, the transverse shaft 16 and the small worm 18 are respectively movably sleeved in different through holes opened on the T-shaped shaft plate 17, and the T-shaped shaft plate 17 also passes through the long strip hole opened on the shell of the inner control barrel 12, thereby limiting the rotation of the inner control barrel 12.

[0037] refer to Figure 5It is understood that the instrument ring group 4 includes a limiting ring tube 22 stuck in an annular groove opened on the outer wall of the main pipeline 1, an outer ring gear 19 arranged outside the limiting ring tube 22, a plurality of neck tubes 21 evenly arranged and fixed between the limiting ring tube 22 and the outer ring gear 19, and a gas sensor 20 fixed in each neck tube 21, a neck tube 21 is connected between the sampling tube 13 and the return pipe 3, the gas sensor 20 is a prior art instrument, the power connection port in the gas sensor 20 extends to the outside of the neck tube 21, the electric contact interface 23 is externally connected to the power supply in the prior art, and when a neck tube 21 is between the sampling tube 13 and the return pipe 3, the internal The gas sensor 20 is electrically connected to detect the pipeline gas flowing between the sampling tube 13 and the return pipe 3. When a new gas sensor 20 is replaced for detection, the outer ring gear 19 is controlled to rotate to drive all the neck tubes 21 to move synchronously around, so that the new neck tube 21 moves between the sampling tube 13 and the return pipe 3, and the new gas sensor 20 in the neck tube 21 begins to detect the pipeline gas passing through. At this time, the power connection port on the new gas sensor 20 automatically contacts the electric contact interface 23 and is energized. The one-way gas valve 10 is a one-way gas guide valve in the prior art, and the one-way gas valve 10 in the return pipe 3 prevents the pipeline gas from flowing back.

[0038] refer to Figure 8 It is understood that the air conveyor 8 includes a square slot box 30 fixedly covered at the square hole of the sampling tube 13, a concave flat tube 26 fixedly connected to the square slot box 30 at one end, and a wind barrel 25 fixedly connected to the other end of the concave flat tube 26.

[0039] The air conveyor 8 also includes a fan 24 distributed in the wind barrel 25, a fan shaft 27 fixed in the middle of the fan 24, a short control shaft 29 that is vertically transmitted to the main shaft 7, and a one-way bearing 28 that establishes a transmission between the short control shaft 29 and the fan shaft 27. One end of the short control shaft 29 is meshed and connected with a bevel gear fixed at the end of the main shaft 7 through a fixed bevel gear. The other end of the short control shaft 29 is fixed with a one-way bearing 28. The fan shaft 27 is fixed to the outside of the one-way bearing 28 by setting a concave plate, and the fan shaft 27 is movably sleeved in a through hole opened in the middle of the bottom plate of the wind barrel 25.

[0040] The recorder 9 includes a long worm gear 33 with one end vertically transmitted to the fan shaft 27, a spring group 31 transmission-connected to the other end of the long worm gear 33, an intermittent gear 35 meshing and transmission-connected to the outer ring gear 19, an intermittent shaft 34 for establishing transmission between the intermittent gear 35 and the spring group 31, and a pressing group 32 for positioning the intermittent shaft 34. The intermittent shaft 34 is vertically fixed in the middle of the intermittent gear 35, and the long worm gear 33 is meshing and transmission-connected to the annular bevel gear fixed on the fan shaft 27 through a fixed bevel gear.

[0041] The pressure-generating group 32 includes a control plate frame 38 fixed on the main pipeline 1, a movable plate 37 sliding through a plate hole opened on the control plate frame 38, and a C-shaped spring piece 36 with one end resting on the movable plate 37, and the other end of the C-shaped spring piece 36 is fixed on the control plate frame 38. The intermittent shaft 34 is movably sleeved in the long column hole opened on the control plate frame 38. One end of the movable plate 37 is inserted into the V-shaped groove opened on the outer wall of the intermittent shaft 34 by setting a pointed end. The control plate frame 38 is also provided with a round hole for the long worm 33 to be movably sleeved.

[0042] The mainspring assembly 31 includes a mainspring 40 fixedly sleeved on an intermittent shaft 34, a slow-control ring gear 41 fixedly sleeved on the outside of the mainspring 40, and a concave binding plate 39 fixed on one side of the slow-control ring gear 41. The intermittent shaft 34 is movably sleeved in a circular hole opened in the middle of the concave binding plate 39, and the slow-control ring gear 41 is meshedly connected with the spiral teeth on the long worm 33.

[0043] A real-time detection sampling method for gas pipeline transportation comprises the following steps:

[0044] Step 1: Sampling detection, the main pipeline 1 is used to transport industrial exhaust gas, the internal control barrel 12 is moved and extended into the main pipeline 1, the exhaust gas in the main pipeline 1 passes through the plate holes of the internal control barrel 12 to impact the inside of the internal control barrel 12, and then is transported through the sampling tube 13 to impact the gas sensor 20, the gas sensor 20 detects the composition of the exhaust gas, and the exhaust gas after detection flows back to the main pipeline 1 through the reflux pipe 3;

[0045] Step 2: Instrument cleaning. After the exhaust gas detection is completed, the internal control barrel 12 moves and retracts into the sampling tube 13. Before the internal control barrel 12 moves to the end, the L-shaped flat tube 14 and the air conveyor 8 are connected for a period of time. The air conveyor 8 conveys clean air or inert gas to the L-shaped flat tube 14, and then injects it into the sampling tube 13 through the internal control barrel 12. The clean air flow blows away the reaction exhaust gas retained in the gas sensor 20 by impacting the gas sensor 20;

[0046] Step three: Instrument replacement. A single sampling test of exhaust gas corresponds to one extension and retraction movement of the internal control barrel 12. The recorder 9 records the number of extension and retraction times of the internal control barrel 12. If the number of extension and retraction times exceeds the specified value, the detection instrument replacement mechanism in the instrument ring group 4 will be automatically triggered, and the new gas sensor 20 will be put into subsequent exhaust gas detection.

[0047] The main shaft 7 is externally connected to the motor drive mechanism in the prior art. The main shaft 7 rotates to drive the outer gear ring 5, and then the transverse shaft 16 is driven through the outer shaft 15. Next, the spur rack 11 is driven to rise and fall through the small worm 18, and then the inner control barrel 12 is driven through the L-shaped flat tube 14. The inner control barrel 12 slides in the sampling tube 13, and the inner control barrel 12 is inserted into the main pipeline 1. The plate holes on the inner control barrel 12 are exposed, and the exhaust gas transported in the main pipeline 1 will be injected into the inner control barrel 12, and then the flow impacts the gas sensor 20. The gas sensor 20 detects the composition ratio of the exhaust gas flow, and the inner control barrel 12 retracts into the sampling tube 13. The L-shaped flat tube 14 and the square trough box 3 0 docking connection, so that clean air or inert gas will be injected into the L-shaped flat tube 14, and the subsequent flow will impact and clean the gas sensor 20. The power for the clean airflow is the rotation of the fan 24. Specifically, when the inner control barrel 12 is inserted into the main pipeline 1, the main shaft 7 is driven in the forward direction, and the inner control barrel 12 is retracted into the sampling tube 13. The main shaft 7 is reversed, and the forward rotation of the main shaft 7 will not be transmitted in the air conveyor 8. The reverse rotation of the main shaft 7 will drive the short control shaft 29, and then drive the fan shaft 27 through the one-way bearing 28, thereby driving the fan 24 to continue to drive, and the clean airflow is transported in the path formed by the wind barrel 25, the concave flat tube 26 and the square trough box 30.

[0048] During the reversal stage of the main shaft 7, the rotation of the fan shaft 27 will also drive the long worm 33, thereby driving the slow-control ring gear 41 to rotate slowly, causing the mainspring 40 to contract and accumulate force. After accumulating enough force, it breaks the blocking effect of the movable plate 37, and then the mainspring 40 releases power to control the intermittent shaft 34 to rotate one circle. After one circle is completed, the movable plate 37 clamps the intermittent shaft 34 again, and the mainspring 40 performs the next stage of contraction and accumulation of force. The process of the intermittent shaft 34 rotating one circle corresponds to a replacement of the gas sensor 20. The intermittent gear 35 rotates to drive the outer ring gear 19, and the outer ring gear 1 9 rotates at a fixed angle, so that the old gas sensor 20 is transferred away, and the new neck tube 21 is transported between the sampling tube 13 and the reflux tube 3, and the new gas sensor 20 inside is put into the subsequent sampling detection. In summary, each sampling detection of the gas sensor 20 corresponds to an extension and contraction of the internal control barrel 12, and the clockwork 40 accumulates power for a period of time. Saturation of power accumulation means that the number of detections of the gas sensor 20 has been reached, and a new gas sensor 20 needs to be replaced to avoid the problem of insensitive response caused by the consumption of the reaction substances inside the old gas sensor 20.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A real-time detection sampling detection mechanism for gas pipeline transportation, comprising a main pipeline (1), characterized in that: One side of the main pipeline (1) is connected to a sampling tube group (2) and a return pipe (3), and an instrument ring group (4) is provided on the outer ring of the main pipeline (1) between the sampling tube group (2) and the return pipe (3); an outer ring gear (5) is provided on the outer ring gear of the sampling tube group (2), and an inner shaft group (6) is transmission-connected between one end of the outer ring gear (5) and the sampling tube group (2), and the other end of the outer ring gear (5) is transmission-connected to a main shaft (7); one side of the sampling tube group (2) is connected to an air conveyor (8) for supplying clean gas, and the air conveyor (8) is transmission-connected to the main shaft (7), and one side of the air conveyor (8) is transmission-connected to a recorder (9), and one end of the recorder (9) is transmission-connected to the instrument ring group (4); a one-way air valve (10) is fixed in the return pipe (3); The sampling tube set (2) comprises a sampling tube (13) fixedly connected to the main pipeline (1), an internal control barrel (12) in which a piston slides at one end of the sampling tube (13), an L-shaped flat tube (14) distributed in the internal control barrel (12), and a straight rack (11) fixed on the L-shaped flat tube (14), one end of the L-shaped flat tube (14) passes through a side shell of the internal control barrel (12), and a square hole connected to the air delivery device (8) is opened on the sampling tube (13). A plate hole for the sampling gas to enter is provided on the bottom side shell of the inner control barrel (12); the outer end of the L-shaped flat tube (14) is opposite to the square hole of the sampling tube (13) to allow the clean gas to enter the inner control barrel (12); the other end of the sampling tube (13) is opposite to the return pipe (3); the main shaft (7) is movably sleeved in a protruding through hole fixed on the outside of the sampling tube (13); and the main shaft (7) is meshed and transmission-connected with the outer gear ring (5) through a fixed cylinder gear; The inner shaft assembly (6) includes a T-shaped shaft plate (17) fixed on the housing of the sampling tube (13), and an outer shaft (15), a transverse shaft (16) and a small worm gear (18) supported on the T-shaped shaft plate (17). The transverse shaft (16) passes through a through hole opened on the housing of one side of the sampling tube (13). One end of the transverse shaft (16) is meshed and connected to a ring-shaped bevel gear fixed on the outer shaft (15) through a fixed bevel gear. The other end of the transverse shaft (16) is meshed and connected to a bevel gear fixed on one end of the small worm gear (18) through a fixed bevel gear. The outer shaft (15) is meshed and connected to a fixed gear outer gear ring (5). The spiral teeth on the small worm gear (18) are meshed with the spur gear (11). The inner edge of the outer gear ring (5) is inserted into an annular groove arranged outside the sampling tube (13).

2. The real-time detection sampling detection mechanism for gas pipeline transportation according to claim 1 is characterized by: The instrument ring assembly (4) comprises a limiting ring tube (22) clamped in an annular groove provided on the outer wall of the main pipeline (1), an outer ring gear (19) arranged outside the limiting ring tube (22), a plurality of neck tubes (21) evenly arranged and fixed between the limiting ring tube (22) and the outer ring gear (19), and a gas sensor (20) fixed in each neck tube (21), and a neck tube (21) is connected between the sampling tube (13) and the return tube (3).

3. The real-time detection sampling detection mechanism for gas pipeline transportation according to claim 2 is characterized by: The air conveyor (8) comprises a square slot box (30) fixedly covered at the square hole of the sampling tube (13), a concave flat tube (26) one end of which is fixedly connected to the square slot box (30), and an air barrel (25) fixedly connected to the other end of the concave flat tube (26).

4. The real-time detection sampling detection mechanism for gas pipeline transportation according to claim 3 is characterized by: The air conveyor (8) further comprises a fan (24) distributed in the wind barrel (25), a fan shaft (27) fixed in the middle of the fan (24), a short control shaft (29) vertically transmitted to the main shaft (7), and a one-way bearing (28) established between the short control shaft (29) and the fan shaft (27) for transmission, one end of the short control shaft (29) being meshed and transmission-connected with a bevel gear fixed to the end of the main shaft (7) via a fixed bevel gear, the other end of the short control shaft (29) being fixedly sleeved with the one-way bearing (28), the fan shaft (27) being fixed to the outside of the one-way bearing (28) by arranging a concave plate on the fan shaft (27), and the fan shaft (27) being movably sleeved in a through hole opened in the middle of the bottom plate of the wind barrel (25).

5. The real-time detection sampling detection mechanism for gas pipeline transportation according to claim 4 is characterized by: The recorder (9) comprises a long worm (33) having one end vertically driven with the fan shaft (27), a spring assembly (31) drivingly connected to the other end of the long worm (33), an intermittent gear (35) meshingly connected with the outer ring gear (19), an intermittent shaft (34) for establishing transmission between the intermittent gear (35) and the spring assembly (31), and a pressing assembly (32) for locking the intermittent shaft (34), wherein the intermittent shaft (34) is vertically fixed to the middle of the intermittent gear (35), and the long worm (33) is meshingly connected with the annular bevel gear fixed on the fan shaft (27) through a fixed bevel gear.

6. A real-time detection sampling detection mechanism for gas pipeline transportation according to claim 5, characterized in that: The pressure-generating group (32) comprises a control plate frame (38) fixed on the main pipeline (1), a movable plate (37) slidingly passing through a plate hole opened in the control plate frame (38), and a C-shaped spring piece (36) with one end resting on the movable plate (37), the other end of the C-shaped spring piece (36) being fixed on the control plate frame (38), the intermittent shaft (34) being movably sleeved in a long column hole opened in the control plate frame (38), one end of the movable plate (37) being inserted into a V-shaped groove opened on the outer wall of the intermittent shaft (34) by providing a tip, and the control plate frame (38) is also provided with a round hole for the long worm (33) to be movably sleeved.

7. The real-time detection sampling detection mechanism for gas pipeline transportation according to claim 5 is characterized by: The spring assembly (31) comprises a spring (40) fixedly sleeved on an intermittent shaft (34), a slow-control ring gear (41) fixedly sleeved outside the spring (40), and a concave binding plate (39) fixed on one side of the slow-control ring gear (41); the intermittent shaft (34) is movably sleeved in a circular hole opened in the middle of the concave binding plate (39); and the slow-control ring gear (41) is meshedly connected with the helical teeth on the long worm (33).

8. A real-time detection sampling method for gas pipeline transportation, used in the real-time detection sampling detection mechanism for gas pipeline transportation according to claim 2, characterized in that: The following steps are involved: Step 1: Sampling detection, industrial exhaust gas is transported in the main pipeline (1), the internal control barrel (12) is moved and extended into the main pipeline (1), the exhaust gas in the main pipeline (1) passes through the plate holes of the internal control barrel (12) to impact the inside of the internal control barrel (12), and then is transported through the sampling tube (13) to impact the gas sensor (20), the gas sensor (20) detects the components of the exhaust gas, and the exhaust gas after detection flows back into the main pipeline (1) through the return pipe (3); Step 2: Cleaning the instrument. After the exhaust gas detection is completed, the internal control barrel (12) moves and retracts into the sampling tube (13). Before the internal control barrel (12) moves to the end, the L-shaped flat tube (14) and the air conveyor (8) are connected for a period of time. The air conveyor (8) conveys clean air or inert gas to the L-shaped flat tube (14), and then injects it into the sampling tube (13) through the internal control barrel (12). The clean air flow blows away the reaction exhaust gas retained in the gas sensor (20) by impacting the gas sensor (20); Step 3: Instrument replacement. A single sampling test of the exhaust gas corresponds to one extension and retraction movement of the internal control barrel (12). The number of extension and retraction times of the internal control barrel (12) is recorded by the recorder (9). If the number of extension and retraction times exceeds the specified value, the detection instrument replacement mechanism in the instrument ring group (4) will be automatically triggered, and the new gas sensor (20) will be put into the subsequent exhaust gas detection.

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