Chemical pipeline automatic inspection device with leakage point checking function

Abstract

The invention discloses a chemical pipeline automatic inspection device with a leakage point checking function, and relates to the technical field of pipeline inspection, the chemical pipeline automatic inspection device comprises a machine body, two sliding groups are arranged on the side wall of the machine body, a hydraulic cylinder is arranged in the inner wall of the machine body, a push rod of the hydraulic cylinder is connected with the sliding groups, and a cleaning assembly is arranged on one side of the machine body. A detection assembly is arranged between the two sliding groups; a machine body is placed in a pipeline, then a hydraulic cylinder is controlled to be started, a push rod of the hydraulic cylinder drives two sliding sets to synchronously move, the sliding sets move towards the side away from the machine body till the sliding sets make contact with the inner wall of the pipeline, then a controller controls the sliding sets to move, the sliding sets drive the machine body to move along the pipeline, and in the machine body moving process, the machine body moves. The cleaning assembly is used for cleaning the inner wall of the pipeline, and then the detection assembly is used for detecting the cleaned inner wall of the pipeline, so that leakage points on the surface of the pipeline are checked, and the detection efficiency of the leakage points of the pipeline is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline inspection, in particular to an automatic inspection device for chemical pipelines with a leak detection function. Background Art

[0002] Chemical pipelines are various pipes used in chemical production. They connect various chemical equipment and machines according to the process flow to transport various media. Chemical pipelines are composed of pipes, pipe fittings, pipe accessories, connecting fixtures and valves. Since the pipelines need to be connected through multiple sections to form a complete transportation channel, leakage is very likely to occur at the connection parts. Secondly, long-term outdoor use of the pipelines is also prone to cracks on their surfaces. Existing pipeline inspection devices usually perform inspections on the outer wall of the pipeline, while small cracks on the inner wall surface of the pipeline are difficult to detect, making pipeline inspection difficult. In addition, manual inspection is usually used for pipelines with external cracks. During the manual inspection process, harmful substances are easily inhaled, causing harm to patrol personnel. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic chemical pipeline inspection device with a leak detection function to solve the problems raised in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions: An automated inspection device for chemical pipelines with a leak detection function comprises a body, two sliding groups are provided on the side walls of the body, a hydraulic cylinder is provided in the inner wall of the body, a push rod of the hydraulic cylinder is connected to the sliding groups, a cleaning component is provided on one side of the body, and a detection component is provided between the two sliding groups; Place the machine body into the pipeline, then control the hydraulic cylinder to start, the push rod of the hydraulic cylinder drives the two sliding groups to move synchronously, the sliding group moves to the side away from the machine body until the sliding group contacts the inner wall of the pipeline, then the controller controls the sliding group to move, and the sliding group drives the machine body to move along the pipeline. During the movement of the machine body, the cleaning component cleans the inner wall of the pipeline, and then the detection component detects the inner wall of the pipeline after cleaning, so as to check for leaks on the pipeline surface, thereby improving the efficiency of pipeline leak detection.

[0005] Preferably, the sliding group includes a moving block, a moving groove is provided on a side of the moving block away from the body, a plurality of rollers are provided in the moving groove, a micro motor is provided in the moving block, and a driving shaft of the micro motor is connected to the rollers.

[0006] Preferably, the cleaning component includes an air supply pipe, which consists of an inner pipe and an outer pipe. The end of the inner pipe away from the cleaning component is connected to the air supply pump through a pipe, and the end of the outer pipe away from the cleaning component is connected to the suction pump through a pipe.

[0007] Preferably, an air guide block is provided on one side of the inner tube, and a plurality of air guide grooves are provided in the air guide block. The plurality of air guide grooves are arranged around the axis of the air guide block, and the air guide grooves are connected to the inner tube. A trumpet tube is provided on the side of the outer tube close to the air guide block, and a plurality of spiral blades are provided between the inner tube and the outer tube.

[0008] Preferably, a rotating ring is provided on the side of the trumpet tube away from the inner tube, the rotating ring is rotatably connected to the trumpet tube, an electromagnetic coil is provided in the trumpet tube, a magnetic conductor is provided in the rotating ring, a plurality of cleaning plates are provided on the side of the rotating ring close to the air guide block, a spacer plate is provided between two adjacent cleaning plates, a plurality of rotating motors are provided in the rotating ring, the driving shaft of the rotating motor is connected to the cleaning plate, and the cleaning plate, the spacer plate and the rotating ring are rotatably connected.

[0009] Preferably, the detection assembly includes a detection block, which is arranged between two sliding groups. A U-shaped ring groove is provided in the detection block, and the U-shaped ring groove is connected to the outer tube. Two sets of sealing groups are symmetrically provided on both sides of the detection block.

[0010] Preferably, the sealing group includes a plurality of extrusion grooves, an electric cylinder is provided in the extrusion groove, a sealing airbag is provided on the push rod of the electric cylinder, a micro air pump is provided in the sealing airbag, and the micro air pump is connected to the outside through a pipeline.

[0011] Preferably, a plurality of impurity grooves are provided on the side of the U-shaped ring groove away from the outer tube, both ends of the impurity grooves are tangent to the U-shaped ring groove, a filter plate is provided between two adjacent impurity grooves, and a pressure sensor is provided on the outer wall of the detection block.

[0012] First, the machine body is placed in the pipe, and then the hydraulic cylinder is started. The hydraulic cylinder's push rod pushes the moving block to move, and the moving block drives the roller to move toward the side close to the inner wall of the pipe. When the roller contacts the inner wall of the pipe, the hydraulic cylinder stops working. At this time, the axis of the machine body and the axis of the pipe are in a coincident state. Then the controller controls the micro motor in the moving block to start. The drive shaft of the micro motor drives the roller to rotate. When the roller rotates, it rubs against the inner wall of the pipe, and then the roller drives the machine body to move along the pipe. During the movement of the sliding group, the controller first controls the micro air pump in the sealing airbag to start, and the micro air pump extracts the outside air and delivers it to the sealing airbag, so that the gas in the sealing airbag gradually increases, causing the volume of the sealing airbag to expand. When the side walls of two adjacent sealing airbags contact and squeeze each other, the micro air pump in the sealing airbag stops, and then the controller controls the electric cylinder in the detection block to start, and the push rod of the electric cylinder pushes the sealing airbag to move, and the sealing airbag then moves toward the inner wall of the pipe. During the movement of the sealing airbag, it contacts the inner wall of the pipe, so that the two sets of sealing groups, the detection block and the pipe form a detection space; When the roller contacts the inner wall of the pipe, the controller controls the rotating motor in the rotating ring to start, and the driving shaft of the rotating motor drives the cleaning plate to rotate. The cleaning plate rotates from the side away from the rotating ring to the side close to the inner wall of the pipe. During the rotation of the cleaning plate, the cleaning plate drives the spacer plate to rotate. When the cleaning plate rotates, it contacts the inner wall of the pipe. Then the controller controls the electromagnetic coil in the horn tube to start. The electromagnetic coil is energized to generate magnetic force. Since a magnetic conductor is provided in the rotating ring, the magnetic force exerts a force on the rotating ring, and the rotating ring immediately generates a rotational force. When the rotating ring rotates, it drives the cleaning plate and the spacer plate to rotate. When the cleaning plate rotates, it cleans the impurities remaining on the inner wall of the pipe. As the machine moves along the pipeline, the controller starts the external air supply pump and the air suction pump. The air supply pump draws the external gas through the pipeline and inputs it into the inner tube, while the air suction pump draws the air in the outer tube outward. After the external air is transported to the inner tube, it is transported to the air guide groove through the inner tube, and then ejected to the cleaning plate through the air guide groove. Since the cleaning plate rotates during the movement of the machine body, the cleaning plate rotates the inner wall of the pipe to clean it. At the same time, the external air is ejected through the air guide groove, so that the impurities attached to the inner wall of the pipe are cleaned under the joint action of the external air and the cleaning plate. The cleaned impurities move to the side close to the bell pipe under the action of the external air, avoiding the impurities from falling into the pipe and being pushed forward by the machine body, thereby improving the cleanliness of the inner wall of the pipe, and avoiding impurities remaining in the pipe and causing blockage, thereby improving the efficiency of subsequent leakage point detection on the inner wall of the pipe; External gas mixed with impurities flows through the bell tube to the outer tube. During the flow, it encounters the spiral blades and is diverted. As the bell tube flows to the outer tube, the channel diameter gradually becomes smaller. In addition, the space between the spiral blades is compressed, and the suction pump cooperates with each other to gradually increase the flow rate in the outer tube. When the external gas mixed with impurities is transported through the outer tube to the U-shaped ring groove, the flow rate reaches the maximum. Then the external gas mixed with impurities flows along the U-shaped ring groove. During the flow process, since there is an impurity groove inside the U-shaped ring groove and the impurity groove is tangent to the U-shaped ring groove, and the cross-section of the U-shaped ring groove is a curve, the flow velocity of the gas will be different on the inside and outside of the curve when it flows through the curve. The flow rate on the outside is faster, and the flow rate on the inside is slower. The centrifugal force generated makes the impurities in the gas more easily affected. Due to the action of centrifugal force, the impurities in the gas will deviate to the outside, and then a part of the gas and impurities will be separated from the U-shaped ring groove and transported to the impurity groove, thereby achieving the effect of impurity separation and avoiding the impurities from being transported to the enclosed detection space, causing fluctuations in the air pressure in the detection space, thereby affecting the detection effect of leaks on the inner wall of the pipeline; the remaining clean gas in the U-shaped ring groove is transported to the enclosed detection space through the filter plate, and the pressure sensor outside the detection block converts the pressure signal in the detection space into an electrical signal and transmits it to the controller. If the pressure in the detection space does not fluctuate too much, there is no leakage problem in the pipeline. If the pressure in the detection space fluctuates too much, there is a leakage problem in the pipeline where the detection space is located; Finally, the separated impurities are collected into the U-shaped ring groove again through the other end of the impurity groove, and are mixed with the gas again and transported to the outer tube, and finally output to the outside.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The cleaning plate rotates during the movement of the machine body, so that the cleaning plate rotates the inner wall of the pipe to clean it. At the same time, the outside air is ejected through the air guide groove, so that the impurities attached to the inner wall of the pipe are cleaned under the joint action of the outside air and the cleaning plate. The cleaned impurities move to the side close to the bell pipe under the action of the outside air, avoiding the impurities from falling into the pipe and being pushed forward by the machine body, thereby improving the cleanliness of the inner wall of the pipe, and avoiding residual impurities in the pipe and causing blockage, thereby improving the efficiency of subsequent leakage point detection on the inner wall of the pipe.

[0014] 2. The impurity groove is tangent to the U-shaped annular groove. Furthermore, the cross-section of the U-shaped annular groove is a curve, so when the gas flows through the curve, the flow rate will be different on the inside and outside of the curve. The flow rate is faster on the outside and slower on the inside. The centrifugal force generated makes the impurities in the gas more easily affected. Due to the action of centrifugal force, the impurities in the gas will shift outward, and then some of the gas and impurities will be separated from the U-shaped annular groove and transported to the impurity groove, thus achieving the effect of impurity separation and preventing impurities from being transported into the enclosed detection space, causing fluctuations in the air pressure in the detection space, and thus affecting the detection effect of leaks on the inner wall of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention when it is in working state; Figure 2It is a front view of the present invention in working state; Figure 3 It is a structural schematic diagram of the present invention when it is in the storage state; Figure 4 It is a front view of the present invention in the storage state; Figure 5 Schematic diagram of the internal structure of the present invention; Figure 6 It is an internal front view of the present invention; Figure 7 It is a structural diagram of the inner tube, air guide groove and spiral blade; Figure 8 It is a schematic diagram of the structure of the outer tube, the trumpet tube and the detection block; Figure 9 Schematic diagram of the internal structure of the detection block; Figure 10 is the internal front view of the detection block; In the figure: 1, body; 11, sliding group; 12, moving block; 13, moving groove; 14, roller; 2. Cleaning assembly; 21. Air duct; 22. Inner tube; 23. Outer tube; 24. Air guide block; 241. Air guide slot; 25. Bell tube; 26. Spiral blade; 27. Rotating ring; 28. Cleaning plate; 29. ​​Spacer; 3. Detection assembly; 31. Detection block; 32. U-shaped ring groove; 33. Sealing group; 34. Extrusion groove; 35. Sealing airbag; 36. Impurity groove; 37. Filter plate. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] Example: Figure 1-Figure 5 As shown, the present invention provides a technical solution for an automated inspection device for chemical pipelines with a leak detection function, comprising a body 1, two sets of sliding groups 11 are provided on the side wall of the body 1, a hydraulic cylinder is provided in the inner wall of the body 1, a push rod of the hydraulic cylinder is connected to the sliding group 11, a cleaning component 2 is provided on one side of the body 1, and a detection component 3 is provided between the two sliding groups 11.

[0018] As a specific embodiment of the present invention, the sliding group 11 includes a moving block 12, a moving groove 13 is provided on the side of the moving block 12 away from the body 1, a plurality of rollers 14 are provided in the moving groove 13, a micro motor is provided in the moving block 12, and the driving shaft of the micro motor is connected to the rollers 14.

[0019] As a specific embodiment of the present invention, the cleaning component 2 includes an air supply pipe 21, which is composed of an inner pipe 22 and an outer pipe 23. The end of the inner pipe 22 away from the cleaning component 2 is connected to the air supply pump through a pipe, and the end of the outer pipe 23 away from the cleaning component 2 is connected to the air suction pump through a pipe.

[0020] As a specific embodiment of the present invention, an air guide block 24 is provided on one side of the inner tube 22, and a plurality of air guide grooves 241 are provided in the air guide block 24. The plurality of air guide grooves 241 are arranged around the axis of the air guide block 24, and the air guide grooves 241 are connected to the inner tube 22. A trumpet tube 25 is provided on the side of the outer tube 23 close to the air guide block 24, and a plurality of spiral blades 26 are provided between the inner tube 22 and the outer tube 23.

[0021] As a specific embodiment of the present invention, a rotating ring 27 is provided on the side of the trumpet tube 25 away from the inner tube 22, and the rotating ring 27 is rotatably connected to the trumpet tube 25. An electromagnetic coil is provided in the trumpet tube 25, and a magnetic conductor is provided in the rotating ring 27. A plurality of cleaning plates 28 are provided on the side of the rotating ring 27 close to the air guide block 24, and a spacer plate 29 is provided between two adjacent cleaning plates 28. A plurality of rotating motors are provided in the rotating ring 27, and the driving shaft of the rotating motor is connected to the cleaning plate 28. The cleaning plate 28 and the spacer plate 29 are rotatably connected to the rotating ring 27.

[0022] As a specific embodiment of the present invention, the detection assembly 3 includes a detection block 31, which is arranged between the two sliding groups 11. A U-shaped ring groove 32 is provided in the detection block 31, and the U-shaped ring groove 32 is connected to the outer tube 23. Two groups of sealing groups 33 are symmetrically provided on both sides of the detection block 31.

[0023] As a specific embodiment of the present invention, the sealing group 33 includes several extrusion grooves 34, an electric cylinder is provided in the extrusion groove 34, a sealing airbag 35 is provided on the push rod of the electric cylinder, a micro air pump is provided in the sealing airbag 35, and the micro air pump is connected to the outside world through a pipeline.

[0024] As a specific embodiment of the present invention, a plurality of impurity grooves 36 are provided on the side of the U-shaped ring groove 32 away from the outer tube 23. The two ends of the impurity grooves 36 are tangent to the U-shaped ring groove 32. A filter plate 37 is provided between two adjacent impurity grooves 36. A pressure sensor is provided on the outer wall of the detection block 31.

[0025] Working principle of the present invention: First, the machine body 1 is placed in the pipe, and then the hydraulic cylinder is started. The hydraulic cylinder's push rod pushes the moving block 12 to move, and the moving block 12 drives the roller 14 to move toward the side close to the inner wall of the pipe. When the roller 14 contacts the inner wall of the pipe, the hydraulic cylinder stops working. At this time, the axis of the machine body 1 and the axis of the pipe are in a coincident state. Then the controller controls the micro motor in the moving block 12 to start. The drive shaft of the micro motor drives the roller 14 to rotate. When the roller 14 rotates, it rubs against the inner wall of the pipe, and then the roller 14 drives the machine body 1 to move along the pipe. During the movement of the sliding group 11, the controller first controls the micro air pump in the sealing airbag 35 to start, and the micro air pump extracts the outside air and delivers it to the sealing airbag 35, so that the gas in the sealing airbag 35 gradually increases, causing the volume of the sealing airbag 35 to expand. When the side walls of two adjacent sealing airbags 35 contact and squeeze each other, the micro air pump in the sealing airbag 35 stops, and then the controller controls the electric cylinder in the detection block 31 to start, and the push rod of the electric cylinder pushes the sealing airbag 35 to move, and the sealing airbag 35 then moves toward the inner wall of the pipe. During the movement of the sealing airbag 35, it contacts the inner wall of the pipe, so that the two sets of sealing groups 33, the detection block 31 and the pipe enclose a detection space; When the roller 14 contacts the inner wall of the pipe, the controller controls the rotating motor in the rotating ring 27 to start, and the driving shaft of the rotating motor drives the cleaning plate 28 to rotate. The cleaning plate 28 rotates from the side away from the rotating ring 27 to the side close to the inner wall of the pipe. During the rotation of the cleaning plate 28, the cleaning plate 28 drives the spacer plate 29 to rotate. When the cleaning plate 28 rotates, it contacts the inner wall of the pipe. Then the controller controls the electromagnetic coil in the trumpet 25 to start. The electromagnetic coil is energized to generate magnetic force. Since a magnetic conductor is provided in the rotating ring 27, the magnetic force generates a force on the rotating ring 27, and the rotating ring 27 immediately generates a rotational force. When the rotating ring 27 rotates, it drives the cleaning plate 28 and the spacer plate 29 to rotate. When the cleaning plate 28 rotates, it cleans the impurities remaining on the inner wall of the pipe. While the body 1 moves along the pipeline, the controller controls the external air delivery pump and the air suction pump to start. The air delivery pump draws the external air through the pipeline and inputs it into the inner tube 22, while the air suction pump draws the air in the outer tube 23 outward. After the external air is transported to the inner tube 22, it is transported to the air guide groove 241 through the inner tube 22, and then ejected toward the cleaning plate 28 through the air guide groove 241. Since the cleaning plate 28 rotates during the movement of the machine body 1, the cleaning plate 28 rotates the inner wall of the pipe to clean it. At the same time, the external air is ejected through the air guide groove 241, so that impurities attached to the inner wall of the pipe are cleaned under the combined action of the external air and the cleaning plate 28. The cleaned impurities are moved to the side close to the bell tube 25 under the action of the external air, preventing the impurities from falling into the pipe and being pushed forward by the machine body 1. The outside gas mixed with impurities flows through the bell tube 25 to the outer tube 23. During the flow, it encounters the spiral blades 26 and is diverted. As the bell tube 25 flows to the outer tube 23, the channel diameter gradually decreases. In addition, the space between the spiral blades 26 is compressed, and the suction pump cooperates with each other to gradually increase the flow rate in the outer tube 23. When the outside gas mixed with impurities is transported through the outer tube 23 to the U-shaped annular groove 32, the flow rate reaches its maximum. The outside gas, mixed with impurities, then flows along the U-shaped annular groove 32. During this flow, the impurity groove 36 is provided within the U-shaped annular groove 32, and the impurity groove 36 is tangential to the U-shaped annular groove 32. Furthermore, the U-shaped annular groove 32 has a curved cross-section, so the gas flows through the curve at different speeds on the inside and outside. The flow speed is faster on the outside, and slower on the inside. The resulting centrifugal force makes the impurities in the gas more susceptible to impact. Due to the action of centrifugal force, impurities in the gas will deviate to the outside, and then a part of the gas and impurities will be separated from the U-shaped ring groove 32 and transported to the impurity groove 36, thereby achieving the effect of impurity separation and avoiding the impurities from being transported into the enclosed detection space, causing fluctuations in the air pressure in the detection space, thereby affecting the detection effect of leaks on the inner wall of the pipeline; the remaining clean gas in the U-shaped ring groove 32 is transported to the enclosed detection space through the filter plate 37, and the pressure sensor outside the detection block 31 converts the pressure signal in the detection space into an electrical signal and transmits it to the controller. If the pressure in the detection space does not fluctuate too much, there is no leakage problem in the pipeline. If the pressure in the detection space fluctuates too much, there is a leakage problem in the pipeline where the detection space is located; Finally, the separated impurities are collected again into the U-shaped annular groove 32 through the other end of the impurity groove 36, and are mixed with the gas again and transported to the outer tube 23, and finally output to the outside.

[0026] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A chemical pipeline automatic inspection device with a leak detection function, characterized in that: The invention comprises a machine body (1), wherein two sets of sliding groups (11) are arranged on the side wall of the machine body (1), a hydraulic cylinder is arranged in the inner wall of the machine body (1), a push rod of the hydraulic cylinder is connected to the sliding group (11), a cleaning component (2) is arranged on one side of the machine body (1), a detection component (3) is arranged between the two sliding groups (11), the sliding group (11) comprises a moving block (12), the cleaning component (2) comprises an air supply pipe (21), the air supply pipe (21) comprises an inner pipe (22) and an outer pipe (23), and the detection component (3) comprises a detection block (31), and the detection block (31) is arranged between the two sliding groups (11).

2. According to claim 1, the automatic inspection device for chemical pipelines with a leak detection function is characterized by: A moving groove (13) is arranged on a side of the moving block (12) away from the machine body (1), a plurality of rollers (14) are arranged in the moving groove (13), a micro motor is arranged in the moving block (12), and a driving shaft of the micro motor is connected to the rollers (14).

3. According to the automatic inspection device for chemical pipelines with leakage detection function of claim 1, it is characterized by: One end of the inner tube (22) away from the cleaning component (2) is connected to the air delivery pump through a pipeline, and one end of the outer tube (23) away from the cleaning component (2) is connected to the air suction pump through a pipeline.

4. The automatic inspection device for chemical pipelines with a leak detection function according to claim 3 is characterized by: An air guide block (24) is provided on one side of the inner tube (22), a plurality of air guide grooves (241) are provided in the air guide block (24), the plurality of air guide grooves (241) are arranged around the axis of the air guide block (24), the air guide grooves (241) are connected to the inner tube (22), a horn tube (25) is provided on one side of the outer tube (23) close to the air guide block (24), and a plurality of spiral sheets (26) are provided between the inner tube (22) and the outer tube (23).

5. The automatic inspection device for chemical pipelines with a leak detection function according to claim 4 is characterized in that: A rotating ring (27) is arranged on the side of the bell tube (25) away from the inner tube (22), and the rotating ring (27) is rotatably connected to the bell tube (25). An electromagnetic coil is arranged in the bell tube (25), and a magnetic conductor is arranged in the rotating ring (27). A plurality of cleaning plates (28) are arranged on the side of the rotating ring (27) close to the air guide block (24), and a spacer plate (29) is arranged between two adjacent cleaning plates (28). A plurality of rotating motors are arranged in the rotating ring (27), and a driving shaft of the rotating motor is connected to the cleaning plate (28). The cleaning plate (28), the spacer plate (29) and the rotating ring (27) are rotatably connected.

6. The automatic inspection device for chemical pipelines with a leak detection function according to claim 3 is characterized by: A U-shaped annular groove (32) is provided in the detection block (31), the U-shaped annular groove (32) is communicated with the outer tube (23), and two groups of sealing groups (33) are symmetrically provided on both sides of the detection block (31).

7. The automatic inspection device for chemical pipelines with a leak detection function according to claim 6 is characterized by: The sealing group (33) comprises a plurality of extrusion grooves (34), an electric cylinder is arranged in the extrusion groove (34), a sealing air bag (35) is arranged on the push rod of the electric cylinder, a micro air pump is arranged in the sealing air bag (35), and the micro air pump is connected to the outside through a pipeline.

8. The automatic chemical pipeline inspection device with a leak detection function according to claim 7 is characterized by: A plurality of impurity grooves (36) are arranged on the side of the U-shaped annular groove (32) away from the outer tube (23), a filter plate (37) is arranged between two adjacent impurity grooves (36), and a pressure sensor is arranged on the outer wall of the detection block (31).

9. The automatic chemical pipeline inspection device with a leak detection function according to claim 8 is characterized by: Both ends of the impurity groove (36) are tangent to the U-shaped annular groove (32).

10. The automatic chemical pipeline inspection device with leakage detection function according to claim 8 is characterized in that: The curvature of the impurity groove (36) is greater than the curvature of the U-shaped annular groove (32).

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