A new type of pneumatic descaling access road machine

Abstract

The application discloses a novel aerodynamic descaling caliper machine, and relates to the technical field of oil field pipeline descaling equipment, which comprises a supporting device for supporting a pipeline, descaling caliper devices and collecting devices arranged at the two ends of the supporting device respectively; the descaling caliper device comprises a supporting mechanism, a descaling caliper mechanism and a driving mechanism; the supporting mechanism is used for sending an aerodynamic drill bit into one end of the pipeline; the descaling caliper mechanism comprises an aerodynamic motor and an aerodynamic drill bit rotating under the drive of the aerodynamic motor, the tail end of the aerodynamic motor is connected with an air pipe, and the tail of the aerodynamic motor is provided with a caliper gauge for checking the inner diameter of the pipeline; the driving mechanism comprises an air pipe conveying device; and the collecting device comprises an extraction mechanism for collecting dirt generated during descaling from the other end of the pipeline. Therefore, the problem of the current oil pipeline inner wall descaling is solved, the inner wall of the oil field pipeline is descaled, the inner diameter is checked, the oil field pipeline is prevented from being blocked, and the oil field transportation efficiency is ensured.

Description

Technical Field

[0001] This application relates to the technical field of oilfield pipeline descaling equipment, and in particular to a novel pneumatic descaling and diameter-checking machine. Background Technology

[0002] The petroleum industry is the industrial sector that extracts oil, oil-bearing rocks, and natural gas, as well as refines and processes them. It includes oil and gas geological exploration, development, extraction, refining, transportation, and storage. Oilfield pipelines (usually metal pipelines) are typically used during the oil and gas extraction and transportation process. During oilfield production, pipelines operate over long periods and distances, and impurities and scale easily accumulate on the inner walls of the pipelines. This can reduce the inner diameter of the pipelines and, in severe cases, lead to blockages, affecting the efficiency of oilfield transportation.

[0003] Currently, the descaling process for the inner walls of oil pipelines faces the following challenges:

[0004] 1. Existing descaling devices mostly use scrapers to remove dirt from inside oil pipelines. However, the rotation of the scraper requires power transmission, and pipelines are generally long, requiring a very long drive shaft, which results in a long power transmission path and low power transmission efficiency.

[0005] 2. The inner wall of the pipe after descaling lacks inspection, making it impossible to quickly check whether the inner wall of the pipe after descaling is qualified and whether the inner diameter meets the standard.

[0006] Therefore, a descaling device is needed to remove scale from the inner wall of oilfield pipelines and inspect the inner diameter to ensure the normal use of the pipelines and prevent blockages that could affect oilfield transportation efficiency. Utility Model Content

[0007] To address the aforementioned problems, achieve descaling of the inner walls of oilfield pipelines, inspect the inner diameter, prevent pipeline blockage, and ensure oilfield transportation efficiency, this application provides a novel pneumatic descaling and diameter-checking machine.

[0008] The novel pneumatic descaling and borehole cleaning machine provided in this application adopts the following technical solution.

[0009] A novel pneumatic descaling and pipe-gauging machine includes: a support device for supporting a pipe, wherein a descaling and pipe-gauging device and a collection device are respectively provided at both ends of the support device;

[0010] The descaling and unscaling device includes a support mechanism, a descaling and unscaling mechanism, and a drive mechanism. The support mechanism includes a support frame with a grooved plate. The grooved plate is driven by a first power unit to move along the axial direction of the pipe, used to feed a pneumatic drill bit into one end of the pipe. The descaling and unscaling mechanism includes a pneumatic motor placed on the grooved plate and a pneumatic drill bit driven to rotate by the pneumatic motor. The tail end of the pneumatic motor is connected to an air pipe, and a gauge for inspecting the inner diameter of the pipe is provided at the tail end of the pneumatic motor. The drive mechanism includes a drive bracket mounted on the support frame. Two drive rollers are spaced vertically on the drive bracket, and at least one drive roller is driven to rotate by a second power unit mounted on the drive bracket. The air pipe passes through the two drive rollers.

[0011] The collection device includes an extraction mechanism for collecting the dirt generated during descaling from the other end of the pipe.

[0012] By adopting the above technical solution, the support device can support the pipeline; the descaling and diameter checking device extends into the pipeline from one end to descale the inner wall of the pipeline and check the diameter; the first power unit can drive the support frame to move and send the starting drill bit into the pipeline, realizing the insertion of the drill bit. The drill bit is powered by a pneumatic motor, which is supplied with air by an air pipe. The air pipe itself has a certain degree of flexibility and can be bent, which can reduce the space occupation and facilitate the insertion of the drill bit into the pipeline by pushing the air pipe, without damaging the inner wall of the pipeline; the drive mechanism can realize the automatic delivery of the air pipe, thereby realizing the change of the position of the drill bit in the pipeline, realizing the descaling of the pipeline in all positions; the extraction mechanism can collect the dirt generated during descaling from the other end of the pipeline, improving environmental protection. In summary, the descaling of the pipeline is realized.

[0013] Optionally, the descaling and unblocking device further includes a reel mechanism, which includes a reel frame and a reel for winding and taking up the air pipe. The reel is driven to rotate by a third power unit mounted on the reel frame.

[0014] By adopting the above technical solution, and through the setting of the reel mechanism, the reel can be rotated by the third power unit, which can realize the automatic winding and rewinding of the air tube, which is beneficial for the collection of the air tube and reduces the space occupation.

[0015] Optionally, a rotating tooth is provided coaxially with the reel, and a second detection switch for detecting the rotation of the rotating tooth is provided on the reel frame.

[0016] By adopting the above technical solution, the rotation speed of the reel and the length of the air pipe released or wound on the reel can be detected by the second detection switch to detect the rotating teeth, and thus the position of the drill bit in the pipeline can be determined, which facilitates the realization of automated control.

[0017] Optionally, a protective ring is provided around the reel.

[0018] By adopting the above technical solution, the installation of the protective ring helps to improve the protection of the reel.

[0019] Optionally, the descaling and unscaling device further includes a centering mechanism, which includes a lifting cylinder and a clamping assembly mounted on the support frame near the support device. The lifting cylinder is used to lift the pipe, and the clamping assembly includes a fixed baffle and a movable baffle mounted on the support frame. The movable baffle is driven by a fourth power unit on the support frame to move closer to or away from the fixed baffle to clamp the pipe. A third detection switch is provided on the fixed baffle and the movable baffle.

[0020] By adopting the above technical solution, and through the setting of the centering mechanism, the lifting cylinder can lift the pipeline, and the fourth power unit can drive the moving baffle to move, which works with the fixed baffle to clamp the pipeline, thereby realizing the automatic centering of the pipeline, ensuring the positioning accuracy of the pipeline, and ensuring that the drill bit is normally fed into the pipeline.

[0021] Optionally, the support device includes several pipe support mechanisms spaced apart along the pipe axial direction. Each pipe support mechanism includes a pipe support frame and V-shaped rollers mounted on the pipe support frame. At least one pipe support mechanism has a fifth power unit mounted on its pipe support frame, which drives the V-shaped rollers to rotate.

[0022] By adopting the above technical solution, the V-shaped roller can be rotated by the fifth power unit, thus realizing pipeline transportation.

[0023] Optionally, the support device further includes several pipe-passing mechanisms spaced apart along the axial direction of the pipe. Each pipe-passing mechanism includes a pipe-passing support frame, on which a pipe-passing rod is hinged. The pipe-passing rod is driven to swing by a sixth power unit mounted on the pipe-passing support frame.

[0024] By adopting the above technical solution and setting the pipe-passing mechanism, automatic loading and unloading of pipes is realized. The sixth power unit can drive the pipe-passing rod to swing. When a pipe to be descaled approaches, the pipe-passing rod swings upward to lift the pipe to be descaled. The pipe to be descaled rolls down onto the V-shaped roller along the inclined direction of the pipe-passing rod, realizing automatic loading. The pipe-passing rod resets. When the pipe descaled is finished, the pipe-passing rod swings up again. The pipe is lifted off the V-shaped roller and automatically completes the rolling unloading.

[0025] Optionally, the lower drive roller is driven to rotate by the second power unit, and a long slot is opened in the vertical direction on the drive bracket. The upper drive roller shaft is located in the long slot and is driven to move up and down by the seventh power unit set on the drive bracket.

[0026] By adopting the above technical solution, the seventh power unit drives the upper drive roller to move up and down, thereby adjusting the gap between the upper and lower drive rollers to ensure proper clamping of the air pipe and ensure the delivery of the air pipe.

[0027] Optionally, the collection device further includes a walking base, and the extraction mechanism includes a walking vehicle mounted on the walking base. The walking vehicle includes a walking frame and walking wheels on the walking frame. An eighth power unit for driving the walking wheels to rotate is provided on the walking frame. An exhaust device for extracting dirt generated during descaling in the collection pipe is provided on the walking vehicle. An extraction lifting bracket is raised and lowered on the walking frame. A fourth detection switch and an extraction connecting pipe connected to the air intake of the exhaust device are provided on the extraction lifting bracket.

[0028] By adopting the above technical solution, the trolley can be used to move the exhaust device closer to or further away from the pipeline, thereby adjusting it to suit pipelines of different lengths and connecting the extraction connector to the other end of the pipeline, ensuring that the exhaust equipment can extract air from the pipeline.

[0029] In summary, this application includes at least the following beneficial effects:

[0030] 1. This application utilizes a support device to support the pipeline; a descaling and diameter-checking device extends into the pipeline from one end to descale the inner wall and check the diameter; a first power unit moves the support frame and sends the starting drill bit into the pipeline; the drill bit is powered by a pneumatic motor, which is supplied with air from an air pipe; the air pipe is flexible and bendable, reducing space occupation and facilitating the insertion of the drill bit into the pipeline without damaging the inner wall of the pipeline; the drive mechanism enables automatic transport of the air pipe, thereby changing the position of the drill bit within the pipeline, achieving full-position descaling within the pipeline; the extraction mechanism collects the waste generated during descaling from the other end of the pipeline, improving environmental friendliness; in summary, this application achieves descaling of the pipeline.

[0031] 2. This application, through the setting of the reel mechanism, uses a third power unit to drive the reel to rotate, which can realize the automatic winding and rewinding of the air tube, which is beneficial for the collection of the air tube and reduces the space occupied by the length.

[0032] 3. This application realizes automatic loading and unloading of pipes through the setting of the pipe-passing mechanism. The sixth power unit can drive the pipe-passing rod to swing. When the pipe to be descaled approaches, the pipe-passing rod swings upward to lift the pipe to be descaled. The pipe to be descaled rolls down onto the V-shaped roller along the inclined direction of the pipe-passing rod to realize automatic loading. The pipe-passing rod resets. When the pipe descaled is finished, the pipe-passing rod swings up again. After the pipe is lifted off the V-shaped roller, it automatically completes the rolling unloading. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the main structure of a new type of pneumatic descaling and gauging machine.

[0035] Figure 2 This is a top view schematic diagram of a new type of pneumatic descaling and borehole cleaning machine.

[0036] Figure 3 This is a side view of a new type of pneumatic descaling and gauging machine.

[0037] Figure 4 This is a schematic diagram of the main structure of the descaling and unscaling device.

[0038] Figure 5 This is a top view schematic diagram of the descaling and unscaling device.

[0039] Figure 6 This is a schematic diagram of the main structure of the collection device.

[0040] Explanation of reference numerals in the attached drawings: 1. Pipe support frame; 2. V-shaped roller; 3. Fifth power unit; 4. Pipe support frame; 5. Pipe rod; 6. Sixth power unit; 7. Support frame; 8. Groove plate; 9. First detection switch; 10. First power unit; 11. Pneumatic motor; 12. Pneumatic drill bit; 13. Gauge; 14. Drive bracket; 15. Second power unit; 16. Reel frame; 17. Reel; 18. Third power unit; 19. Rotary gear; 20. Second detection switch; 21. Protective ring; 22. Lifting cylinder; 23. Fixed baffle; 24. Moving baffle; 25. Fourth power unit; 26. Third detection switch; 27. Traveling base; 28. Traveling vehicle; 29. ​​Eighth power unit; 30. Exhaust equipment; 31. Pull-out lifting bracket; 32. Fourth detection switch; 33. Pull-out connecting pipe; 34. Pipe. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] The following is in conjunction with the appendix Figures 1 to 6 This application will be described in further detail.

[0043] This application discloses a novel pneumatic descaling and borehole cleaning machine.

[0044] Reference Figures 1 to 6 A novel pneumatic descaling and purging machine includes: a support device, a descaling and purging device, and a collection device.

[0045] The support device includes several pipe support mechanisms and pipe passage mechanisms distributed at intervals along the axial direction of the pipe 34.

[0046] The pipe 34 support mechanism is used to support the pipe 34. As shown in the figure, there are four pipe 34 support mechanisms spaced apart. The pipe 34 support mechanism includes a pipe support frame 1 and V-shaped rollers 2 set on the pipe support frame 1. The pipe support frame 1 of the two middle pipe 34 support mechanisms is equipped with a fifth power unit 3. The fifth power unit 3 can be a motor reducer set. The fifth power unit 3 drives the V-shaped rollers 2 to rotate. By driving the V-shaped rollers 2 to rotate through the fifth power unit 3, the conveying of pipe 34 can be realized.

[0047] There are two pipe-passing mechanisms spaced apart. Each mechanism includes a pipe-passing support frame 4, with a pipe-passing rod 5 hinged to it. The pipe-passing rod 5 is driven to swing by a sixth power unit 6, which can be a cylinder, and is hinged to the support frame 4. This enables automatic loading and unloading of the pipe 34. The sixth power unit 6 drives the pipe-passing rod 5 to swing. When a pipe 34 to be descaled approaches, the pipe-passing rod 5 swings upward, lifting the pipe 34. The pipe 34 then rolls down along the inclined direction of the pipe-passing rod 5 onto the V-shaped roller 2, achieving automatic loading. The pipe-passing rod 5 then resets. After descaling of the pipe 34 is complete, the pipe-passing rod 5 swings upward again, lifting the pipe 34 away from the V-shaped roller 2 and automatically completing the unloading process.

[0048] The descaling and unscaling device includes a support mechanism, a descaling and unscaling mechanism, a drive mechanism, a reel mechanism, and a centering mechanism.

[0049] The support mechanism includes a support frame 7, on which a grooved plate 8 is provided. A first detection switch 9 is provided on both sides of the grooved plate 8 to detect whether the pneumatic drill bit 12 is in place. The grooved plate 8 is driven by a first power unit 10 to move axially along the pipe 34. The first power unit 10 can be a cylinder, used to send the pneumatic drill bit 12 into one end of the pipe 34.

[0050] The descaling and drilling mechanism includes a pneumatic motor 11 placed on a grooved plate 8 and a pneumatic drill bit 12 driven by the pneumatic motor 11 to rotate. The tail end of the pneumatic motor 11 is connected to an air pipe.

[0051] The tail of the pneumatic motor 11 is equipped with a gauge 13 for inspecting the inner diameter of the pipe 34. When the pneumatic drill bit 12 enters the pipe 34, the gauge 13 can inspect the inner wall of the pipe 34 after descaling. If the gauge 13 can pass through the inner wall of the pipe 34, the inspection is qualified. If it cannot pass through, it is unqualified and the pneumatic drill bit 12 needs to be returned to descaling again. If it is still unqualified after multiple descalings, the pipe 34 is scrapped.

[0052] The drive mechanism includes a drive bracket 14 mounted on a support frame 7. Two drive rollers are spaced vertically on the drive bracket 14, with an air pipe passing between the two drive rollers. The lower drive roller is driven to rotate by a second power unit 15, which can be a motor reducer. A long slot is formed along the vertical direction on the drive bracket 14. The upper drive roller shaft is located within the long slot and is moved up and down by a seventh power unit mounted on the drive bracket 14, which can be a cylinder. By using the seventh power unit, the upper drive roller is moved up and down, thereby adjusting the gap between the two drive rollers to ensure proper clamping of the air pipe and ensure air delivery.

[0053] The winding mechanism includes a winding frame 16, on which a winding 17 for winding and taking up the air hose is provided. A third power unit 18 is provided on the winding frame 16. The third power unit 18 can be a motor reducer unit. Through the setting of the winding mechanism, the third power unit 18 drives the winding 17 to rotate, which can realize the automatic winding and taking up of the air hose, which is beneficial for the collection of air hose and reduces space occupation.

[0054] A rotating tooth 19 is coaxially arranged with the reel 17, and a second detection switch 20 for detecting the rotation of the rotating tooth 19 is provided on the reel frame 16. By detecting the rotating tooth 19 through the second detection switch 20, the rotational speed of the reel 17 and the length of the air pipe released or wound on the reel 17 can be detected, and the position of the drill bit in the pipe 34 can also be determined, which facilitates the realization of automated control.

[0055] A protective ring 21 is provided around the reel 17, which helps to improve the protection of the reel 17.

[0056] The centering mechanism includes a lifting cylinder 22 and a clamping assembly mounted on the support frame 7 near the support device. The lifting cylinder 22 is used to lift the pipe 34. The clamping assembly includes a fixed baffle 23 and a movable baffle 24 mounted on the support frame 7. The movable baffle 24 is driven by a fourth power unit 25 on the support frame 7 to move closer to or away from the fixed baffle 23. The fourth power unit 25 can be a cylinder. A third detection switch 26 is provided on the fixed baffle 23 and the movable baffle 24 to detect whether the pipe 34 is in position. Through the centering mechanism, the lifting cylinder 22 can lift the pipe 34, and the fourth power unit 25 can drive the movable baffle 24 to move, cooperating with the fixed baffle 23 to clamp the pipe 34, thereby achieving automatic centering of the pipe 34, ensuring the accuracy of the positioning of the pipe 34, and ensuring that the drill bit is fed normally into the pipe 34.

[0057] A collection device is used to collect the dirt generated during descaling from the other end of the pipe 34. The collection device includes a traveling base 27 and an extraction mechanism.

[0058] The traveling base 27 is located at the other end of the pipe 34. The extraction mechanism includes a traveling vehicle 28 mounted on the traveling base 27. The traveling vehicle 28 includes a traveling frame and traveling wheels on the traveling frame. An eighth power unit 29 is mounted on the traveling frame to drive the traveling wheels to rotate. The eighth power unit 29 can be a motor reducer unit. The traveling vehicle 28 is equipped with an exhaust device 30 for extracting and collecting dirt generated during descaling in the pipe 34. An extraction lifting bracket 31 is raised and lowered on the traveling frame near the pipe 34. The extraction lifting bracket 31 is equipped with a fourth detection switch 32 and an extraction connecting pipe 33 connected to the air intake of the exhaust device 30. The fourth detection switch 32 is used to detect the position of the pipe 34 and whether it is connected to the extraction connecting pipe 33. By setting the traveling vehicle 28, the exhaust device can be moved closer to or away from the pipe 34, thereby adjusting it to suit pipes 34 of different lengths and connecting the extraction connecting pipe 33 to the other end of the pipe 34, ensuring that the exhaust device 30 extracts air from the pipe 34.

[0059] The support device can support the pipe 34; the descaling and diameter detection device extends into the pipe 34 from one end to descale the inner wall of the pipe 34 and detect the diameter. The first power unit 10 can drive the support frame 7 to move and send the starting drill bit into the pipe 34 to realize the insertion of the drill bit. The drill bit is powered by a pneumatic motor 11, which is supplied with air by an air pipe. The air pipe itself has a certain degree of flexibility and can be bent, which can reduce the space occupation and facilitate the insertion of the drill bit into the pipe 34 by pushing the air pipe, and the inner wall of the pipe 34 is not damaged. The drive mechanism can realize the automatic delivery of the air pipe, thereby realizing the change of the position of the drill bit in the pipe 34, realizing the full-position descaling in the pipe 34. The extraction mechanism can collect the dirt generated during descaling from the other end of the pipe 34, improving environmental protection. In summary, the descaling of the pipe 34 is realized.

[0060] In the description of this utility model, it should be understood that the terms "upper," "lower," "one end," "the other end," and "both sides," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the term "connection" should be interpreted broadly. For example, it can refer to a mechanical connection or an electrical connection, or it can refer to the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0061] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A novel pneumatic descaling and borescope machine, characterized in that, include: A support device for supporting pipelines, wherein a descaling device and a collection device are respectively provided at both ends of the support device; The descaling and unscaling device includes a support mechanism, a descaling and unscaling mechanism, and a drive mechanism. The support mechanism includes a support frame with a grooved plate. The grooved plate is driven by a first power unit to move along the axial direction of the pipe, used to feed a pneumatic drill bit into one end of the pipe. The descaling and unscaling mechanism includes a pneumatic motor placed on the grooved plate and a pneumatic drill bit driven to rotate by the pneumatic motor. The tail end of the pneumatic motor is connected to an air pipe, and a gauge for inspecting the inner diameter of the pipe is provided at the tail end of the pneumatic motor. The drive mechanism includes a drive bracket mounted on the support frame. Two drive rollers are spaced vertically on the drive bracket, and at least one drive roller is driven to rotate by a second power unit mounted on the drive bracket. The air pipe passes through the two drive rollers. The collection device includes an extraction mechanism for collecting the dirt generated during descaling from the other end of the pipe.

2. The novel pneumatic descaling and borehole cleaning machine according to claim 1, characterized in that, The descaling and unblocking device also includes a reel mechanism, which includes a reel frame and a reel for winding and taking up the air pipe. The reel is driven to rotate by a third power unit mounted on the reel frame.

3. A novel pneumatic descaling and borehole cleaning machine according to claim 2, characterized in that, A rotating tooth is coaxially arranged with the reel, and a second detection switch for detecting the rotation of the rotating tooth is provided on the reel frame.

4. A novel pneumatic descaling and borehole cleaning machine according to claim 2, characterized in that, The reel is surrounded by a protective ring.

5. A novel pneumatic descaling and borehole cleaning machine according to claim 1, characterized in that, The descaling and unblocking device also includes a centering mechanism, which includes a lifting cylinder and a clamping assembly mounted on the support frame near the support device. The lifting cylinder is used to lift the pipe, and the clamping assembly includes a fixed baffle and a movable baffle mounted on the support frame. The movable baffle is driven by a fourth power unit on the support frame to move closer to or away from the fixed baffle to clamp the pipe. A third detection switch is provided on the fixed baffle and the movable baffle.

6. A novel pneumatic descaling and borehole cleaning machine according to claim 1, characterized in that, The support device includes several pipe support mechanisms spaced apart along the pipe axis. Each pipe support mechanism includes a pipe support frame and V-shaped rollers mounted on the pipe support frame. At least one pipe support mechanism has a fifth power unit mounted on its pipe support frame, which drives the V-shaped rollers to rotate.

7. A novel pneumatic descaling and borehole cleaning machine according to claim 6, characterized in that, The support device also includes several pipe-passing mechanisms spaced apart along the axial direction of the pipe. Each pipe-passing mechanism includes a pipe-passing support frame, on which a pipe-passing rod is hinged. The pipe-passing rod is driven to swing by a sixth power unit mounted on the pipe-passing support frame.

8. A novel pneumatic descaling and borehole cleaning machine according to claim 1, characterized in that, The lower drive roller is driven to rotate by the second power unit. A long slot is opened on the drive bracket in the vertical direction. The upper drive roller shaft is located in the long slot and is driven to move up and down by the seventh power unit set on the drive bracket.

9. A novel pneumatic descaling and borehole cleaning machine according to claim 1, characterized in that, The collection device also includes a walking base, and the extraction mechanism includes a walking vehicle mounted on the walking base. The walking vehicle includes a walking frame and walking wheels on the walking frame. An eighth power unit for driving the walking wheels to rotate is provided on the walking frame. An exhaust device for removing dirt generated during descaling in the collection pipe is provided on the walking vehicle. An extraction lifting bracket is raised and lowered on the walking frame. A fourth detection switch and an extraction connecting pipe connected to the exhaust device are provided on the extraction lifting bracket.

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