CN118149210A - Gas pipeline inner wall corrosion detection device - Google Patents

Abstract

The invention relates to the technical field of pipeline detection, in particular to a gas pipeline inner wall corrosion detection device, which comprises: dolly, supplementary removal subassembly, first drive assembly, detection component, pressure sensor and separation and reunion spacing subassembly: the auxiliary moving assembly is used for assisting the trolley to move in the pipeline; the detection assembly is used for collecting photos of the inner wall of the pipeline and processing the collected photos to identify corrosion areas of the inner wall of the pipeline; the clutch limiting assembly is used for controlling the second gear of the first transmission assembly to move along the axial direction of the rotating rod, so that the first gear is meshed with or separated from the second gear, the rotating induction frame of the auxiliary moving assembly rotates until the auxiliary wheel contacts the inner wall of the pipeline during meshing, and the second gear is limited during separation to prevent the rotating induction frame of the auxiliary moving assembly from rotating. The trolley of the detection device can creep up and down in the vertical bending gas pipeline to detect corrosion through the combined work of the trolley roller and the auxiliary wheel of the auxiliary moving assembly.

Description

Gas pipeline inner wall corrosion detection device

Technical Field

The invention relates to the technical field of pipeline detection, in particular to a gas pipeline inner wall corrosion detection device.

Background

Urban gas pipe networks are important components in urban infrastructure construction, pipeline corrosion problems are increasingly prominent in recent years, and the urban gas pipe networks enter the accident frequency of pipeline accidents, so that potential threats are brought to urban safety.

The gas pipeline for detecting the damage position of the pipeline disclosed in the prior art comprises a first gas pipeline, a first left side pressure device, a first differential pressure processor, a first right side pressure device, a pipeline connecting seam, a left strain gauge, a right strain gauge and a bearing plate, wherein the first left side pressure device is arranged on the left side inside the first gas pipeline, the first differential pressure processor is connected to the right side of the first left side pressure device, the first right side pressure device is connected to the right side of the first differential pressure processor, the right side of the first gas pipeline is connected with a second gas pipeline through the pipeline connecting seam, the right side of the left strain gauge is provided with the right strain gauge, and the bearing plate is arranged at the bottom of filling gas; the pipeline detection devices proposed in the prior art all move transversely to realize pipeline detection.

However, in practical applications there are vertically arranged pipes, especially with curved vertical pipes, and the devices provided by the prior art do not allow for inner wall detection of curved vertical pipes.

Accordingly, it is desirable to provide a gas pipeline inner wall corrosion detection device that addresses the above-described issues.

Disclosure of Invention

The invention provides a gas pipeline inner wall corrosion detection device, which is characterized in that an auxiliary moving assembly is arranged, so that the auxiliary moving assembly and a trolley roller form a support in a pipeline together, and the problem that in practical application, a vertically arranged pipeline, particularly a vertical pipeline with a bend, cannot detect the inner wall of the bent vertical pipeline is solved.

The invention relates to a gas pipeline inner wall corrosion detection device, which adopts the following technical scheme: comprising the following steps:

A trolley;

an auxiliary movement assembly, comprising: one end of the rotary induction frame is rotationally connected in a groove formed in the top of the trolley through a rotary rod, and an auxiliary wheel is arranged at the other end of the rotary induction frame, wherein the rotary rod is parallel to an axle of the trolley;

a first transmission assembly, comprising: the first gear is sleeved and fixed on an axle inside the shell of the trolley; the second gear is arranged at the end part of the rotating rod through a guide structure, the guide structure is used for guiding the second gear along the axial direction of the rotating rod, and the first gear is meshed with the second gear;

The detection assembly is used for collecting photos of the inner wall of the pipeline and processing the collected photos to identify a corrosion area of the inner wall of the pipeline;

The pressure sensor is used for detecting whether the auxiliary wheel is pressed or not;

And the clutch limiting assembly is used for enabling the rotary induction frame to rotate through the first transmission assembly when the axle rotates until the pressure sensor detects that the auxiliary wheel is pressed, driving the second gear to move along the axial direction of the rotary rod, enabling the first gear to be separated from the second gear, and limiting the second gear to prevent the rotary induction frame from rotating.

Preferably, the guide structure comprises: the cross section is rectangular square pole, and square pole concentric setting is at the tip of rotary rod, and wherein, the second gear cover is established on square pole.

Preferably, the clutch limiting assembly comprises:

The movable block is arranged at the top of the shell of the trolley in a sliding manner, and the bottom of the movable block is provided with a containing groove, wherein the containing groove of the movable block is sleeved on a part of the second gear which radially penetrates out of the top of the shell of the trolley;

The gear limiting groove is formed in the inner wall of the shell of the trolley;

And the linear driving assembly is used for driving the movable block to move and driving the second gear to axially slide along the square rod so as to enable the second gear to be meshed with or separated from the first gear, and when the second gear is separated from the first gear, the second gear moves into the gear limiting groove.

Preferably, the detection assembly comprises: the device comprises a processing module, a positioner and two cameras, wherein the two cameras are respectively arranged on the front end face and the rear end face of the shell of the trolley, the processing module is used for processing photos acquired by the cameras to identify a corrosion area of the inner wall of the pipeline, and the positioner is used for positioning the corrosion area.

Preferably, the rotating induction frame comprises: two second poles that fix perpendicularly on a first pole, and first pole and two second poles form U type structure, and wherein, the rotary rod sets up at two tip of first pole, and the auxiliary wheel passes through the shaft setting and deviates from the tip of first pole at the second pole, and pressure sensor sets up the shaft and the junction of second pole at the auxiliary wheel, and pressure sensor and processing module electricity are connected.

Preferably, an annular illuminating lamp is sleeved and fixed on the outer ring of the mounting seat of the camera.

Preferably, the method further comprises: the cleaning assembly is connected with the axle through the second transmission assembly, and when the trolley moves, the axle rotates and drives the cleaning assembly to rotate through the second transmission assembly so as to clean lenses of the camera and a lampshade of the annular illuminating lamp.

Preferably, the second transmission assembly comprises:

the inner ring of the annular belt wheel is rotationally connected with the outer ring of the annular illuminating lamp, and the outer ring is rotationally connected with a first mounting hole on the end face of the trolley shell;

the driving wheel is rotationally connected in a second mounting hole on the end face of the trolley shell;

The transmission belt is arranged between the annular belt pulley and the driving wheel in a transmission way;

and the input end of the gear transmission assembly is in transmission connection with an axle inside the trolley shell, and the output end of the gear transmission assembly is in transmission connection with the driving wheel.

Preferably, the gear assembly comprises:

the third gear is sleeved and fixed on the axle;

a fourth gear engaged with the third gear;

and one end of the transmission rod is connected with the fourth gear, and the other end of the transmission rod is connected with the driving wheel.

Preferably, the cleaning assembly comprises: and one end of the rotating block is connected to the axial surface of the annular belt wheel, and cleaning cotton is arranged between the rotating block and the lens of the camera.

The beneficial effects of the invention are as follows:

1. According to the invention, the auxiliary moving assembly is arranged, when the trolley runs, the axle is meshed with the two gears of the first transmission assembly, so that the rotary induction frame of the auxiliary moving assembly rotates, the auxiliary wheel on the rotary induction frame is propped against the inner wall of the pipeline, at the moment, the second gear is driven to move through the clutch limiting assembly, so that the second gear is separated from the first gear, and the second gear is limited, so that the rotary induction frame of the auxiliary moving assembly is limited and fixed, at the moment, when the trolley moves, the trolley works together with the auxiliary wheel on the rotary induction frame, and crawls up and down in the vertical bent gas pipeline, so that the detection of the corrosion area of the inner wall of the pipeline is realized by the detection assembly on the trolley, and the purpose of up and down crawling in the bent gas pipeline is achieved.

2. According to the invention, the second transmission assembly and the cleaning assembly are arranged, the second transmission assembly is in transmission connection with the axle, and when the trolley moves, the axle rotates and drives the cleaning assembly to rotate through the second transmission assembly, so that cleaning cotton of the cleaning assembly wipes and cleans dust adhered on the camera and the irradiation lamp, and further, the influence of dust on the camera and the irradiation lamp on the normal work of the camera and the irradiation lamp is avoided, so that the detection result is more accurate.

3. According to the invention, the positioner, the illumination lamp and the camera are arranged, the interior of the gas pipeline is illuminated through the illumination lamp, at the moment, the camera at the front end can pick up and detect the corrosion part of the inner wall of the gas pipeline, the camera at the rear end can leak to observe and detect the corrosion part of the inner wall of the pipeline, and then the positioner is used for marking and positioning the corrosion part detected by the camera to wait for subsequent repair, so that the device can detect the corrosion part of the gas pipeline more comprehensively.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an embodiment of a gas pipeline inner wall corrosion detection device of the present invention;

FIG. 2 is a schematic view of the bottom half-section of the interior of the cart of the present invention;

FIG. 3 is a schematic view of the endless belt pulley, drive pulley, belt, detection assembly, and cleaning assembly of the present invention;

FIG. 4 is a schematic view of the structure of the first transmission assembly, the auxiliary moving assembly and the movable block of the present invention;

FIG. 5 is a schematic view of a partial enlarged structure at A in FIG. 2 according to the present invention;

fig. 6 is a partially enlarged schematic structural view of the present invention at B in fig. 4.

In the figure: 1. a trolley; 2. a driving member; 3. an axle; 4. a roller; 5. a first gear; 6. a second gear; 7. square rods; 8. a rotating rod; 9. a rotary induction frame; 10. an auxiliary wheel; 11. a gear limit groove; 12. a movable block; 13. an electric push rod; 14. a fixed block; 15. a positioner; 16. an annular lighting lamp; 17. a camera; 18. a third gear; 19. a fourth gear; 20. a transmission rod; 21. a driving wheel; 22. a transmission belt; 23. an annular belt wheel; 24. a rotating block; 25. cleaning cotton.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

An embodiment of a gas pipeline inner wall corrosion detection device of the present invention, as shown in fig. 1, includes: dolly 1, supplementary removal subassembly, first drive assembly, detection component, pressure sensor and separation and reunion spacing subassembly: the auxiliary moving assembly includes: the rotary induction frame 9, one end of the rotary induction frame 9 is rotatably connected in a groove formed in the top of the trolley 1 through a rotary rod 8, and an auxiliary wheel 10 is arranged at the other end of the rotary induction frame 9, wherein the rotary rod 8 is parallel to the axle 3 of the trolley 1; as shown in fig. 4, the first transmission assembly in this embodiment includes: a first gear 5 and a second gear 6, wherein the first gear 5 is sleeved and fixed on the axle 3 inside the shell of the trolley 1; the second gear 6 is arranged at the end part of the rotating rod 8 through a guiding structure, and the guiding structure is used for guiding the second gear 6 along the axial direction of the rotating rod 8; the detection assembly is used for collecting photos of the inner wall of the pipeline and processing the collected photos to identify corrosion areas of the inner wall of the pipeline; the pressure sensor is used for detecting whether the auxiliary wheel 10 is pressed or not; and the clutch limiting assembly is used for driving the rotary induction frame 9 to rotate through the first transmission assembly when the axle 3 of the trolley 1 rotates until the pressure sensor detects that the auxiliary wheel 10 is pressed, driving the second gear 6 to move along the axial direction of the rotary rod 8, so that the first gear 5 and the second gear 6 are separated, and limiting the second gear 6 to prevent the rotary induction frame 9 from rotating.

It should be noted that, when the driving member 2 on the trolley 1 runs, the driving member 2 will make the axle 3 rotate, the first gear 5 rotates when the axle 3 rotates, when the trolley 1 is at the pipeline turning position, the second gear 6 is meshed with the first gear 5 by controlling the clutch limiting assembly, so as to drive the rotary rod 8 to rotate the rotary induction frame 9 until the auxiliary wheel 10 on the rotary induction frame 9 contacts with the inner wall of the pipeline, and at this time, the roller 4 and the auxiliary wheel 10 of the trolley 1 roll in the gas pipeline, so that the rotary induction frame 9 realizes the support of the trolley, thereby facilitating the trolley 1 to climb up and down in the pipeline.

Specifically, as shown in fig. 6, the guide structure includes: the square rod 7 with a rectangular section, the square rod 7 is concentrically arranged at the end part of the rotating rod 8, wherein the second gear 6 is sleeved on the square rod 7.

Specifically, the spacing subassembly of separation and reunion includes: the movable block 12, the gear limiting groove 11 and the linear driving assembly, wherein the movable block 12 is arranged at the top of the shell of the trolley 1 in a sliding manner, the bottom of the movable block 12 is provided with a containing groove, and the containing groove of the movable block 12 is sleeved on a part of the second gear 6 which radially penetrates out of the top of the shell of the trolley 1; the gear limiting groove 11 is formed in the inner wall of the shell of the trolley 1, the linear driving assembly is used for driving the movable block 12 to move and driving the second gear 6 to axially slide along the square rod 7, so that the second gear 6 is meshed with or separated from the first gear 5, as shown in fig. 5, the gear limiting groove 11 matched with the second gear 6 is formed in the shell of the trolley 1, when the movable block 12 moves, the second straight gear 6 is driven to move into the gear limiting groove 11, the gear limiting groove 11 is further used for limiting the second straight gear 6, the square rod 7 on the rotary induction frame 9 is limited, and limiting fixation of the position of the rotary induction frame 9 is achieved.

Specifically, as shown in fig. 2, the detection assembly includes: the device comprises a processing module, a positioner 15 and two cameras 17, wherein the two cameras 17 are respectively arranged on the front end face and the rear end face of the shell of the trolley 1, the processing module is used for processing photos acquired by the cameras 17 to identify a corrosion area of the inner wall of a pipeline, and the positioner 15 is used for positioning the corrosion area so as to facilitate subsequent maintenance; it should be noted that, through the design to two camera 17 positions, when the camera 17 of dolly 1 front end leaks pipeline inner wall corrosion department, the camera 17 of rear end will leak the inspection detection pipeline inner wall corrosion department this moment to make the device detect more comprehensively.

Specifically, the rotary induction stand 9 includes: two second poles fixed perpendicularly on a first pole, and first pole and two second poles form U type structure, wherein, rotary rod 8 sets up at the both ends of first pole, auxiliary wheel 10 deviates from the tip of first pole at the second pole through the shaft setting, pressure sensor sets up the shaft and the second pole junction at auxiliary wheel 10, in this embodiment, pressure sensor sets up in the shaft of auxiliary wheel 10 and the mounting hole on the second pole of rotatory induction frame 9, when auxiliary wheel 10 is pressed, auxiliary wheel 10 will press the transmission to the shaft, the epaxial pressure that the auxiliary wheel of sensor response of shaft received, pressure sensor and processing module electricity are connected.

Specifically, in order to prevent the brightness of the interior of the pipeline from being too low and affecting the operation of the detection assembly, in this embodiment, an annular illuminating lamp 16 is sleeved and fixed on the outer ring of the mounting seat of the camera 17.

Specifically, as shown in fig. 3, the method further includes: the cleaning assembly is connected with the axle 3 through a second transmission assembly, and when the trolley 1 moves, the axle 3 rotates and drives the cleaning assembly to rotate through the second transmission assembly so as to clean lenses of the camera 17.

Specifically, as shown in fig. 2 and 3, the second transmission assembly includes: the device comprises an annular belt pulley 23, a driving wheel 21, a driving belt 22 and a gear transmission assembly, wherein the inner ring of the annular belt pulley 23 is rotationally connected with the outer ring of the annular illuminating lamp 16, and the outer ring of the annular belt pulley 23 is rotationally connected with a first mounting hole on the end face of the shell of the trolley 1; the driving wheel 21 is rotatably connected in a second mounting hole on the end face of the shell of the trolley 1; the transmission belt 22 is arranged between the annular belt pulley 23 and the driving wheel 21 in a transmission way; the input of gear drive subassembly is connected with the inside axletree 3 transmission of dolly 1 casing, and gear drive subassembly's output is connected with the action wheel 21 transmission, and wherein, drive belt 22 sets up in the casing of dolly 1, and with the shells inner wall sliding connection of dolly 1 to make drive belt 22 carry out spacingly to action wheel 21 and annular band pulley 23 through the shells inner wall of dolly 1, and then make annular band pulley 23 can not break away from.

As shown in fig. 2, the gear assembly includes: the third gear 18, the fourth gear 19 and the transmission rod 20 are sleeved and fixed on the axle 3; the fourth gear 19 is meshed with the third gear 18; one end of the transmission rod 20 is connected with the fourth gear 19, and the driving wheel 21 at the other end of the transmission rod 20 is connected, which means that through the design of the third gear 18 and the fourth gear 19, when the axle 3 rotates, the third gear 18 drives the driving wheel 21 to rotate through the fourth gear 19 and the connecting rod 20, and further the rotation on the axle 3 is transmitted to the cleaning assembly to rotate.

Specifically, the cleaning assembly includes: the rotating block 24, one end of which is connected to the axial surface of the annular belt wheel 23, and cleaning cotton 25 is arranged between the rotating block and the lens of the camera 17, and through the design of the cleaning cotton 25, when the annular belt wheel 23 rotates, the annular belt wheel 23 drives the cleaning cotton 25 to wipe and clean dust adhered to the lens of the camera 17 and the lampshade of the annular illuminating lamp 16 through the rotating block 24, so that the camera 17 and the annular illuminating lamp 16 are prevented from being blocked by dust.

Specific working principle

During the use, through the driving piece 2 that starts dolly 1, drive axletree 3 by driving piece 2 and rotate, and control first gear 5 and second gear 6 meshing through separation and reunion spacing subassembly, thereby drive second gear 6 and take place to rotate when first gear 5 rotates, and then make second gear 6 drive rotary rod 8 through square rod 7 and take place to rotate, so that rotary rod 8 drives rotatory induction frame 9 and rotate, until auxiliary wheel 10 supports the pipeline inner wall, when the pipeline inner wall is contacted to auxiliary wheel 10, can extrude the epaxial pressure sensor of auxiliary wheel 10, this pressure sensor sets up between the shaft of rotatory induction frame 9 and auxiliary wheel 10, thereby contact the pipeline inner wall at auxiliary wheel 10, the roller can extrude pressure sensor, pressure sensor can give control module with extrusion signal, send control signal to electric putter 13 by processing module, make movable block 12 drive second gear 6 move into the inside of gear spacing groove 11 by electric putter 13, electric putter 13 is prior art, the electric telescopic is mainly comprises the motor, the body of rod, the drive gear, the controller principle is: the motor is the key part of the flexible work of drive, and the slide rail is used for fixed flexible and is strikeed for, guarantees its steady operation, and drive gear is the key component part of transmission motor drive power, and the controller is then used for controlling the start-stop of motor and the locking of telescopic link, and this is prior art, and this is not described in detail here.

And break away from the meshing with first gear 5, and then when gear spacing groove 11 is spacing to second gear 6, realize spacing fixed to rotatory pole 8, drive piece 2 drive gyro wheel 4 this moment, gyro wheel 4 and auxiliary wheel 10 creep about in the vertical crooked gas pipeline and detect the corruption department to reached the purpose of crawling about in crooked gas pipeline and detecting the corruption department.

Meanwhile, due to the rotation of the axle 3, the axle 3 drives the fourth gear 19 and the connecting rod 20 to rotate with the driving wheel 21 through the third gear 18, and then the driving wheel 21 drives the annular belt wheel 23 to rotate through the driving belt 22, so that the annular belt wheel 23 drives the cleaning cotton 25 to wipe and clean dust adhered on the camera 17 and the irradiation lamp 16 through the rotating block 24, the camera 17 and the irradiation lamp 16 are prevented from being blocked by dust to work normally, and the purpose of cleaning the camera 17 and the irradiation lamp 16 is achieved.

Inside the illumination gas pipeline through the irradiation lamp 16, camera 17 alright gather the picture of gas pipeline inner wall this moment to by processing module to image processing with acquire corrosion area, then mark the location through locator 15 and wait for follow-up repair to corrosion area, when detecting pipeline inner wall corrosion department when the camera 17 hourglass of front end is observed afterwards, the camera 17 of rear end will mend the hourglass and observe and detect pipeline inner wall corrosion department this moment, clean subassembly work in camera 17 observation period, can not influence camera 17 and gather the picture, thereby make the device detect more comprehensive when gas pipeline corrosion department.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. A gas pipeline inner wall corrosion detection device, comprising: trolley (1), characterized in that it further comprises:

An auxiliary movement assembly, comprising: one end of the rotary induction frame (9) is rotationally connected in a groove formed in the top of the trolley (1) through a rotary rod (8), and the other end of the rotary induction frame is provided with an auxiliary wheel (10), wherein the rotary rod (8) is parallel to an axle (3) of the trolley (1);

a first transmission assembly, comprising: the first gear (5) and the second gear (6), the first gear (5) is sleeved and fixed on the axle (3) in the shell of the trolley (1); the second gear (6) is arranged at the end part of the rotating rod (8) through a guide structure, the guide structure is used for guiding the second gear (6) along the axial direction of the rotating rod (8), and the first gear (5) is meshed with the second gear (6);

The detection assembly is used for collecting photos of the inner wall of the pipeline and processing the collected photos to identify a corrosion area of the inner wall of the pipeline;

A pressure sensor for detecting whether the auxiliary wheel (10) is pressed;

And the clutch limiting assembly is used for enabling the rotary induction frame (9) to rotate through the first transmission assembly when the axle (3) rotates until the pressure sensor detects that the auxiliary wheel (10) is pressed, driving the second gear (6) to axially move along the rotary rod (8) so that the first gear (5) and the second gear (6) are separated, and limiting the second gear (6) to prevent the rotary induction frame (9) from rotating.

2. The gas pipeline inner wall corrosion detection device according to claim 1, wherein the guide structure comprises: the section is rectangular square rod (7), and square rod (7) concentric setting is at the tip of rotary rod (8), and wherein, second gear (6) cover is established on square rod (7).

3. The gas pipeline inner wall corrosion detection device according to claim 2, wherein the clutch limiting assembly comprises:

The movable block (12) is arranged at the top of the shell of the trolley (1) in a sliding manner, and the bottom of the movable block is provided with a containing groove, wherein the containing groove of the movable block (12) is sleeved on a part of the second gear (6) which radially penetrates out of the top of the shell of the trolley (1);

The gear limiting groove (11) is formed in the inner wall of the shell of the trolley (1);

And the linear driving assembly is used for driving the movable block (12) to move and driving the second gear (6) to axially slide along the square rod (7) so as to enable the second gear (6) to be meshed with or separated from the first gear (5), and when the second gear (6) is separated from the first gear (5), the second gear (6) moves into the gear limiting groove (11).

4. The gas pipeline inner wall corrosion detection device according to claim 1, wherein the detection assembly comprises: the device comprises a processing module, a positioner (15) and two cameras (17), wherein the two cameras (17) are respectively arranged on the front end face and the rear end face of the shell of the trolley (1), the processing module is used for processing photos acquired by the cameras (17) to identify a corrosion area of the inner wall of a pipeline, and the positioner (15) is used for positioning the corrosion area.

5. The gas pipeline inner wall corrosion detection device according to claim 4, wherein the rotary induction frame (9) comprises: two second poles fixed perpendicularly on a first pole, and first pole and two second poles form U type structure, and wherein, rotary rod (8) set up at two tip of first pole, and auxiliary wheel (10) set up the tip that deviates from first pole at the second pole through the shaft, and pressure sensor sets up the shaft and the junction of second pole at auxiliary wheel (10), and pressure sensor and processing module electricity are connected.

6. The gas pipeline inner wall corrosion detection device according to claim 4, wherein an annular illuminating lamp (16) is sleeved and fixed on an outer ring of a mounting seat of the camera (17).

7. The gas pipeline inner wall corrosion detection device according to claim 6, further comprising: the cleaning assembly is connected with the axle (3) through the second transmission assembly, and when the trolley (1) moves, the axle (3) rotates and drives the cleaning assembly to rotate through the second transmission assembly so as to clean lenses of the camera (17) and a lampshade of the annular illuminating lamp (16).

8. The gas pipeline inner wall corrosion detection device according to claim 6, wherein the second transmission assembly comprises:

The inner ring of the annular belt wheel (23) is rotationally connected with the outer ring of the annular illuminating lamp (16), and the outer ring is rotationally connected with a first mounting hole on the end face of the shell of the trolley (1);

The driving wheel (21) is rotationally connected in a second mounting hole on the end face of the shell of the trolley (1);

The transmission belt (22) is arranged between the annular belt wheel (23) and the driving wheel (21) in a transmission way;

And the input end of the gear transmission assembly is in transmission connection with an axle (3) in the shell of the trolley (1), and the output end of the gear transmission assembly is in transmission connection with a driving wheel (21).

9. The gas pipeline inner wall corrosion detection device according to claim 8, wherein the gear transmission assembly comprises:

The third gear (18) is sleeved and fixed on the axle (3);

A fourth gear (19) which meshes with the third gear (18);

And a transmission rod (20) one end of which is connected with the fourth gear (19) and the other end of which is connected with the driving wheel (21).

10. The gas pipeline inner wall corrosion detection device according to claim 8, wherein the cleaning assembly comprises:

And one end of the rotating block (24) is connected to the axial surface of the annular belt wheel (23), and cleaning cotton (25) is arranged between the rotating block and the lens of the camera (17).