Pipeline internal corrosion detection device for pressure pipeline

Abstract

The invention relates to the technical field of ultrasonic detection, and particularly discloses a pipeline internal corrosion detection device for a pressure pipeline, which comprises a flaw detector, the outer surface of the lower end of the flaw detector is fixedly connected with an ultrasonic probe for scanning the pipeline, and the outer surface of one side of the flaw detector is provided with a connecting kit for binding the flaw detector on a to-be-detected pipeline. The connecting suite consists of two groups of chains, a cross rod is fixedly connected between the two groups of chains, and the outer surface of the other side of the flaw detector is connected with a hook butted with the cross rod; a moving assembly for driving the flaw detector to move on the pipeline is arranged on the outer surface of the lower end of the flaw detector, a connecting sleeve is arranged on one side of the flaw detector, the flaw detector can be bound to the outer surfaces of pipelines of different sizes through a plurality of chains, the two chains and the transverse rod are bound to the surfaces of the pipelines, and meanwhile the moving direction of the flaw detector can be limited; the stability of the flaw detector is improved, and meanwhile, the height of a hook is changed by rotating an adjusting rod, so that the binding degree of the chain can be adjusted.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic detection, in particular to a device for detecting internal corrosion of a pressure pipeline. Background Art

[0002] Pressure pipelines are key infrastructure used in industrial production to transport gas, liquid, and slurry media. They are widely used in multiple industries such as petrochemicals, electric power, and metallurgy. The transported media are gas, liquefied gas, steam, or flammable, explosive, toxic, corrosive liquids with a maximum operating temperature higher than or equal to the standard boiling point. Due to the importance of pressure pipelines, in order to ensure that they are always in a safe operating state during normal operation, pressure pipelines need to be regularly inspected for quality. The most important of these is corrosion inspection of pressure pipelines to avoid stress concentration caused by pipeline corrosion, which may lead to safety hazards. The existing inspection method mainly uses ultrasonic detectors to accurately measure the wall thickness and corrosion detection of pipe walls using the ultrasonic principle. This method has high accuracy and is not limited by wall thickness or inner and outer wall. During ultrasonic testing, coupling agent needs to be sprayed between the probe and the pipe to reduce the absorption of ultrasonic energy by air. However, most existing ultrasonic equipment uses an external pipe to continuously spray the coupling agent at the test site. This not only wastes a lot of coupling agent, but also causes uneven spraying of the coupling agent due to the movement of the ultrasonic probe, leaving bubbles between the probe and the pipe, thus affecting the ultrasonic test results. To this end, we propose a device for detecting corrosion inside a pressure pipeline. Summary of the Invention

[0003] The object of the present invention is to provide a device for detecting corrosion in a pressure pipeline to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting internal corrosion of a pressure pipeline, comprising a flaw detector, an ultrasonic probe for scanning the pipeline fixedly connected to the outer surface of the lower end of the flaw detector, a connection kit for tying the flaw detector to the pipeline to be tested provided on one outer surface of the flaw detector, the connection kit comprising two sets of chains, a crossbar fixedly connected between the two sets of chains, and a hook connected to the crossbar connected to the outer surface of the other side of the flaw detector; The outer surface of the lower end of the flaw detector is provided with a moving assembly for driving the flaw detector to move on the pipeline. The moving assembly includes a groove formed on the outer surface of the lower end of the flaw detector. A motor is provided inside the groove. The output end of the motor is fixedly connected to a drive wheel, which is a Mecanum wheel. A retractable rod with adjustable length is fixedly connected between the motor and the groove. The outer surface of the lower end of the flaw detector is provided with a spray coupling agent coating component, and the coating component includes a flow channel. The flow channel is designed as a ring structure and surrounds the ultrasonic probe. The outer surface of the flaw detector is provided with an embedding groove connected to the flow channel. An infusion tube for conveying the coupling agent is embedded in the embedding groove, and the end of the flow channel is designed as an inclined structure.

[0005] Among them, the outer surface of the infusion tube is provided with a socket, and a valve plate is slidably connected to the inside of the socket. The valve plate and the socket are adapted to each other and maintained sealed. The height of the socket is smaller than the height of the infusion tube, and the end of the valve plate extends to the outside of the socket.

[0006] Among them, the outer surface of the valve plate is rotatably connected to a connecting rod through a rotating shaft, the end of the connecting rod away from the valve plate is an annular structure, and is rotatably connected to a connecting rod inside it, one end of the connecting rod is fixedly connected to turntable 1, and the other end is fixedly connected to turntable 2, the axes of turntable 1 and turntable 2 coincide with each other, the end of turntable 1 away from the connecting rod is rotatably connected to a bearing, the bearing is rotatably connected to the flaw detector, and a counterweight block is provided below the annular outer surface of turntable 2.

[0007] Among them, the annular outer surface of the turntable 2 is fixedly connected with a telescopic rod, and the annular outer surface of the telescopic rod is provided with a telescopic sleeve, the end of the telescopic sleeve away from the turntable 2 is fixedly connected to the counterweight block, and the end of the telescopic sleeve away from the flaw detector is fixedly connected to the guide rod, and the outer surface of the flaw detector is fixedly connected with a fixed rod at the position of the central circular hole of the bearing, the fixed rod passes through turntable 1 and turntable 2, and the end thereof is fixedly connected to a disk wheel, and a guide groove is provided on the outer surface of the disk wheel close to the flaw detector, and the guide rod is located inside the guide groove.

[0008] There are two groups of guide grooves, which are symmetrically distributed with the telescopic sleeve as the symmetry axis. The two groups of guide grooves are interconnected to form a closed loop, and the guide grooves are designed as a spiral structure.

[0009] Among them, the outer surface of the chain away from the cross bar is fixedly connected with several groups of protrusions, the outer surface of the lower end of the protrusion is embedded with a ball bearing, one side of the hook is fixedly connected with a sliding block, the outer surface of the upper end of the sliding block is rotatably connected to the adjusting rod through a rotating shaft, the outer surface of the adjusting rod is provided with a thread, and the outer surface of the flaw detector is fixedly connected with a limiting block threadedly connected to the adjusting rod at a corresponding position of the outer surface of the flaw detector. The sliding block is designed as a rectangular structure, and one end of it is in contact with the outer surface of the flaw detector.

[0010] The hook is formed by bending sheet metal, and a notch is provided at one end of the limiting block away from the flaw detector. A gear is rotatably connected to the notch through a rotating shaft and is engaged with a thread on the outer surface of the adjusting rod.

[0011] In which, the moving assembly also includes a slide, a slide groove is provided on the inner surface of the groove at a position corresponding to the slide, the end of the slide is located inside the slide, a storage cavity is provided inside the flaw detector at a position corresponding to the motor, and the interior of the storage cavity is slidably connected with a matching extrusion plate, the lower end outer surface of the extrusion plate is fixedly connected with a spring 1 at the corresponding position of the storage cavity, the upper end outer surface of the motor is fixedly connected with a lifting rod, the upper end of the lifting rod extends into the storage cavity and is fixedly connected to the extrusion plate, an annular groove is provided on the outer surface of the lower end of the flaw detector, a lifting ring is slidably connected inside the annular groove, the lower end outer surface of the lifting ring is fixedly connected with a silicone ring, a spring 2 is fixedly connected between the lifting ring and the annular groove, and a channel is provided between the annular groove and the storage cavity, and the two are connected through the channel.

[0012] The ring groove is located outside the flow channel, the silicone ring is designed as a hollow structure, and through holes are provided on the outer surfaces of the upper ends of the silicone ring and the lifting ring.

[0013] The present invention has at least the following beneficial effects: 1. By providing a connection kit on one side of the flaw detector, the flaw detector can be tied to the outer surface of pipes of different sizes through multiple sets of chains. Two sets of chains and a crossbar are tied to the pipe surface, which can limit the movement direction of the flaw detector and increase its stability. At the same time, by rotating the adjustment rod to change the height of the hook, the tightness of the chain binding can be adjusted. The above mechanism improves the versatility of the device. 2. An inclined flow channel is provided around the ultrasonic probe on the outer surface of the lower end of the flaw detector for spraying coupling agent, allowing the coupling agent to flow along the ultrasonic probe to the outer wall of the pipeline to be tested. The coupling agent's fluidity and viscosity make it easier to form a thin film of coupling agent between the ultrasonic probe and the pipeline, evenly applying the coupling agent to the test area, which is beneficial to the propagation of ultrasound and reduces ultrasonic energy loss. At the same time, a valve with a variable opening is provided on the surface of the infusion tube. When the flaw detector is at the highest point of the pipeline, the coupling agent will flow along the annular outer surface of the pipeline under the action of gravity, making it easier to form a thin film. The opening of the infusion tube can be reduced, reducing the coupling agent flow rate and lowering usage costs. When the flaw detector is at the lowest point of the pipeline, the coupling agent cannot flow on the pipeline surface by gravity alone. Increasing the opening of the infusion tube allows more coupling agent to contact the ultrasonic probe through the flow channel, which is conducive to the formation of a coupling agent film. 3. By setting a silicone ring on the periphery of the ultrasonic probe, when adjusting the distance between the ultrasonic probe and the pipe, the silicone ring will squeeze the outer surface of the annular pipe, isolating the ultrasonic probe in a small space. Then, coupling agent is injected into the small space through the flow channel, and the ultrasonic probe is soaked in the coupling agent, thereby ensuring full contact between the ultrasonic probe and the coupling agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the moving component and the coating component of the present invention; Figure 3 It is a structural schematic diagram of the mobile assembly of the present invention; Figure 4 Schematic diagram of the structure of the coating assembly of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle; Figure 6 This is a schematic structural diagram of the silicone ring and lifting ring of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic structural diagram of the valve plate and connecting rod of the present invention; Figure 9 This is a schematic structural diagram of the turntable 1, the connecting rod, and the turntable 2 of the present invention; Figure 10 This is a schematic structural diagram of the counterweight and the disc pulley of the present invention; Figure 11 It is a structural schematic diagram of the guide groove of the present invention; Figure 12 For the present invention Figure 1 A in the middle is an enlarged structural diagram; Figure 13 This is a schematic structural diagram of the extrusion plate and storage cavity of the present invention; Figure 14 Schematic diagram of the structure of the channel and storage cavity of the present invention; Figure 15 It is a schematic diagram of the explosion structure of the silicone ring and the lifting ring of the present invention.

[0015] Figure: 1. Flaw detector; 10. Ultrasonic probe; 11. Limit block; 12. Sliding block; 13. Hook; 14. Gear; 15. Adjustment rod; 16. Notch; 2. Connector kit; 20. Crossbar; 21. Protrusion; 22. Chain; 3. Moving assembly; 30. Drive wheel; 31. Motor; 32. Retracting rod; 33. Groove; 34. Slide; 35. Slide plate; 36. Ring groove; 37. Silicone ring; 38. Lifting ring; 381. Spring 2; 382. Through hole ; 39. Spring 1; 391. Storage chamber; 392. Channel; 393. Extrusion plate; 394. Lifting rod; 4. Coating assembly; 40. Embedded groove; 41. Valve plate; 411. Socket; 42. Flow channel; 43. Infusion tube; 44. Connecting rod; 45. Counterweight; 46. Disc pulley; 47. Bearing; 48. Turntable 1; 49. Connecting rod; 50. Fixed rod; 51. Turntable 2; 52. Telescopic sleeve; 53. Guide rod; 54. Telescopic rod; 55. Guide groove. 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 1: Please refer to Figure 1-15 The present invention provides a technical solution: a device for detecting corrosion inside a pressure pipeline, comprising a flaw detector 1, wherein an ultrasonic probe 10 for scanning the pipeline is fixedly connected to the outer surface of the lower end of the flaw detector 1, and a connection kit 2 for tying the flaw detector 1 to the pipeline to be tested is provided on the outer surface of one side of the flaw detector 1, wherein the connection kit 2 is composed of two sets of chains 22, and a cross bar 20 is fixedly connected between the two sets of chains 22. A hook 13 that docks with the cross bar 20 is connected to the outer surface of the other side of the flaw detector 1; the two sets of chains 22 are used to tie the flaw detector 1 to the outer surface of the pipeline to be tested. Due to the characteristics of the chains 22, the connection kit 2 can tie the flaw detector 1 to pipelines of different diameters and at the same time limit the movement direction of the flaw detector 1 to prevent it from deviating; See also Figure 1The outer surface of the lower end of the flaw detector 1 is provided with a moving component 3 for driving the flaw detector 1 to move on the pipeline. The moving component 3 includes a groove 33 formed on the outer surface of the lower end of the flaw detector 1. A motor 31 is provided inside the groove 33. The output end of the motor 31 is fixedly connected to a driving wheel 30, which is a Mecanum wheel. A retractable rod 32 with adjustable length is fixedly connected between the motor 31 and the groove 33. The flaw detector 1 performs circular motion or translational motion around the outer surface of the pipeline, which is driven by the Mecanum wheel driven by the motor 31, thereby increasing the range of motion of the flaw detector 1. The distance between the flaw detector 1 and the pipeline can be adjusted by adjusting the tightness of the binding of the connecting kit 2, so that a small gap is maintained between the ultrasonic probe 10 and the pipeline, which facilitates the formation of a flowing layered film by the coupling agent in the gap, thereby facilitating the passage of ultrasound and reducing ultrasonic energy loss. See also Figures 5 to 7 The lower outer surface of the flaw detector 1 is provided with a spray coupling agent coating assembly 4. The coating assembly 4 includes a flow channel 42. The flow channel 42 is annular and surrounds the ultrasonic probe 10. The outer surface of the flaw detector 1 is provided with an embedding groove 40 connected to the flow channel 42. A liquid infusion tube 43 for delivering the coupling agent is embedded within the embedding groove 40. The end of the flow channel 42 is designed with an inclined structure, and the tilt direction is aligned with the ultrasonic probe 10. When the coupling agent flows along the ultrasonic probe 10 toward the pipeline, the viscosity of the coupling agent forms a thin film between the ultrasonic probe 10 and the pipeline. The annular shape of the flow channel 42 ensures that the coupling agent can be distributed to the outer surface of the ultrasonic probe 10, thereby covering the pipeline surface with the coupling agent. The coating assembly 4 in the above structure forms a thin film of coupling agent between the ultrasonic probe 10 and the pipeline, which facilitates ultrasonic penetration. At the same time, with the help of the connection kit 2, the tightness of the connection kit 2 can be adjusted for pipelines of different diameters, thereby maintaining the gap between the ultrasonic probe 10 and the pipeline for pipelines of different sizes.

[0018] See also Figures 7 to 9 The outer surface of the infusion tube 43 is provided with a socket 411, and a valve plate 41 is slidably connected to the inside of the socket 411. The valve plate 41 and the socket 411 are adapted to each other and maintain a seal therebetween. The height of the socket 411 is smaller than the height of the infusion tube 43. The end of the valve plate 41 extends to the outside of the socket 411. The valve plate 41 slides inside the socket 411, so that the flow rate of the coupling agent in the flow channel 42 is restricted by the valve plate 41. At the same time, the valve plate 41 is completely located inside the infusion tube 43, and a sealing gasket is provided on the surface of the valve plate 41 to prevent leakage.

[0019] See also Figures 8 to 10The outer surface of the valve disc 41 is rotatably connected to a connecting rod 44 through a rotating shaft. The end of the connecting rod 44 away from the valve disc 41 is an annular structure, and a connecting rod 49 is rotatably connected inside it. One end of the connecting rod 49 is fixedly connected to a turntable 1 48, and the other end is fixedly connected to a turntable 2 51. The axes of the turntable 1 48 and the turntable 2 51 coincide with each other. The end of the turntable 1 48 away from the connecting rod 49 is rotatably connected to a bearing 47, and the bearing 47 is rotatably connected to the flaw detector 1. A counterweight 45 is provided below the annular outer surface of the turntable 2 51. By providing a counterweight 45 on the outer surface of the flaw detector 1, the counterweight 45 is always vertically downward due to its own weight. When the flaw detector 1 makes a circular motion around the pipeline, the counterweight 45 remains vertically downward. Relative to the flaw detector 1, the turntable 1 48 and the turntable 2 51 and the connecting rod 4 9 rotates, and turntable 1 48, turntable 2 51, and connecting rod 49 form a crankshaft structure. When the flaw detector 1 moves around the pipeline, the valve plate 41 slides back and forth along the socket 411 under the action of the connecting rod 44, turntable 1 48, and connecting rod 49. Through the above structure, when the flaw detector 1 moves from the highest point to the lowest point of the pipeline, the opening of the valve plate 41 gradually reaches its maximum. At this time, the ultrasonic probe 10 and the flow channel 42 of the flaw detector 1 gradually open upward, and a portion of the coupling agent will fall directly to the ground under the action of gravity. In order to ensure that the coupling agent contacts the pipeline, the opening of the valve plate 41 is increased, thereby increasing the flow rate of the coupling agent, ensuring that the pipeline surface is sufficiently coated with coupling agent. When the flaw detector 1 moves from the lowest point to the highest point of the pipeline again, the opening of the valve plate 41 gradually decreases to the minimum, reducing the flow rate of the coupling agent and avoiding coupling agent waste.

[0020] See also Figure 8 and 9The annular outer surface of the turntable 2 51 is fixedly connected to a telescopic rod 54, and the annular outer surface of the telescopic rod 54 is sleeved with a telescopic sleeve 52. The end of the telescopic sleeve 52 away from the turntable 2 51 is fixedly connected to the counterweight 45, and the end of the telescopic sleeve 52 away from the flaw detector 1 is fixedly connected to a guide rod 53. The outer surface of the flaw detector 1 is fixedly connected to a fixing rod 50 at the center circular hole position of the bearing 47. The fixing rod 50 passes through the turntable 1 48 and the turntable 2 51, and its end is fixedly connected to the disc wheel 46. The outer surface of the disc wheel 46 near the flaw detector 1 is provided with a guide groove 55, and the guide rod 53 is located inside the guide groove 55. Since the opening between the valve plate 41 and the socket 411 is affected by the counterweight 45, When the flaw detector 1 moves along the pipeline from the highest point of the pipeline to the lowest point of the pipeline, the disc wheel 46 moves synchronously with the flaw detector 1 and rotates 180° relative to the counterweight 45. At this time, the telescopic sleeve 52, guided by the guide rod 53, moves along the guide groove 55 together with the counterweight 45 and gradually moves away from the disc wheel 46, increasing the length of the counterweight 45 to the bearing 47, thereby increasing the torque for opening and closing the valve plate 41, and thus increasing the stability of the structure. When the flaw detector 1 moves from the lowest point of the pipeline to the highest point of the pipeline, the disc wheel 46 moves synchronously with the flaw detector 1 and rotates again 180° relative to the counterweight 45 to complete the reset. The counterweight 45 gradually approaches the disc wheel 46 through the guide rod 53 on the surface of the telescopic sleeve 52 to prevent the pipeline from blocking the counterweight 45.

[0021] See also Figure 10 and 11 There are two groups of guide grooves 55, and the two groups are symmetrically distributed with the telescopic sleeve 52 as the symmetry axis. The two groups of guide grooves 55 are interconnected to form a closed loop. The guide grooves 55 are designed as a spiral structure, and the bearing 47 is used as the rotating part connecting the turntable 48 to facilitate the passage of the fixing rod 50. The disk wheel 46 is fixedly connected to the flaw detector 1 through the fixing rod 50.

[0022] See also Figure 1 and 12The chain 22 is fixedly connected to the outer surface away from the cross bar 20 with a plurality of groups of protrusions 21. The outer surface of the lower end of the protrusion 21 is embedded with a ball. The ball reduces the friction of the chain 22 when sliding on the surface of the pipe, thereby increasing the smoothness of the movement of the flaw detector 1. One side of the hook 13 is fixedly connected to the sliding block 12. The outer surface of the upper end of the sliding block 12 is connected to the adjusting rod 15 through the rotating shaft. The cross bar 20 in the middle of the chain 22 is embedded in the middle of the hook 13. The flaw detector 1 is tied to the surface of the pipe through the chain 22. The outer surface of the rod 15 is provided with a thread. The user rotates the adjusting rod 15 to pull the hook 13 upward, so that the chain 22 is tied to the pipe more tightly. The distance between the ultrasonic probe 10 and the pipe can be adjusted by squeezing the moving component 3. The outer surface of the flaw detector 1 is fixedly connected to a limiting block 11 threadedly connected to the adjusting rod 15 at a position corresponding to the adjusting rod 15. The sliding block 12 is designed as a rectangular structure, and one end of it is in contact with the outer surface of the flaw detector 1. The sliding block 12 remains stable when sliding along the side wall of the flaw detector 1.

[0023] See also Figure 12 The hook 13 is made of sheet metal bent and composed of sheets, which can increase the contact area between the hook 13 and the cross bar 20, making the connection more stable. The end of the limiting block 11 away from the flaw detector 1 is provided with a notch 16, and the inside of the notch 16 is connected to a gear 14 that is threadedly engaged with the outer surface of the adjusting rod 15 through a rotating shaft. The principle of worm gear is used to make the adjusting rod 15 self-locking, reducing the difficulty of operation.

[0024] Example 2: Please refer to Figure 3 、 13The movable assembly 3 also includes a slide plate 35, and a slide groove 34 is provided on the inner surface of the groove 33 at a position corresponding to the slide plate 35. The end of the slide plate 35 is located inside the slide groove 34 and matches the slide groove 34. A storage cavity 391 is provided inside the flaw detector 1 at a position corresponding to the motor 31. The storage cavity 391 is slidably connected to an extrusion plate 393 matching it. The lower end outer surface of the extrusion plate 393 is fixedly connected to a spring 1 39 at a position corresponding to the storage cavity 391. The upper end outer surface of the motor 31 is fixedly connected to a lifting rod 394. The upper end of the lifting rod 394 extends into the storage cavity 391 and is fixedly connected to the extrusion plate 393. The outer surface of the lower end of the flaw detector 1 is provided with an annular groove 36, and a lifting ring 38 is slidably connected to the inner surface of the annular groove 36. The outer surface of the lower end of the lifting ring 38 is fixedly connected to a silicone ring 37. A spring 2 381 is fixedly connected between the lifting ring 38 and the annular groove 36. A channel 392 is provided between the storage chamber 391 and the storage chamber 391, and the two are connected by the channel 392. The present embodiment and the first embodiment are implemented simultaneously for the best effect. When the distance between the flaw detector 1 and the pipeline is changed by rotating the adjustment rod 15, the flaw detector 1 will press the driving wheel 30 and the motor 31, compressing the retraction rod 32. The lifting rod 394 lifts the extrusion plate 393 inside the storage chamber 391, and the air between the storage chamber 391 and the extrusion plate 393 is pressed into the annular groove 36 through the channel 392, forcing the lifting ring 38 to move downward along the annular groove 36, forcing the second spring 381 to stretch, pressing the silicone ring 37 to fit the outer surface of the pipeline. As the coupling agent enters the flow channel 42, the ultrasonic probe 10 is immersed in the space formed between the silicone ring 37, the pipeline, and the flaw detector 1. Excess coupling agent flows out through the gap between the silicone ring 37 and the pipeline. The above structure can reduce the cavity formed in the coupling agent, further reducing the loss of ultrasonic energy.

[0025] The ring groove 36 is located on the outside of the flow channel 42. The silicone ring 37 is designed as a hollow structure, and the upper outer surfaces of the silicone ring 37 and the lifting ring 38 are both provided with through holes 382. The design of the through holes 382 can inject the air inside the storage cavity 391 into the hollow silicone ring 37 through the channel 392, so that the silicone ring 37 expands, increases the contact area with the pipeline, and increases the stability of the above structure.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting internal corrosion of a pressure pipeline, comprising a flaw detector (1), wherein an ultrasonic probe (10) for scanning the pipeline is fixedly connected to the outer surface of the lower end of the flaw detector (1), and characterized in that: A connection kit (2) for tying the flaw detector (1) to the pipeline to be tested is provided on one side of the outer surface of the flaw detector (1), the connection kit (2) comprising two groups of chains (22), a cross bar (20) being fixedly connected between the two groups of chains (22), and a hook (13) docking with the cross bar (20) is connected to the other side of the outer surface of the flaw detector (1); The outer surface of the lower end of the flaw detector (1) is provided with a moving assembly (3) for driving the flaw detector (1) to move on the pipeline, the moving assembly (3) comprising a groove (33) formed on the outer surface of the lower end of the flaw detector (1), a motor (31) being provided inside the groove (33), a driving wheel (30) being fixedly connected to the output end of the motor (31), the driving wheel (30) being a Mecanum wheel, and a retractable rod (32) with adjustable length being fixedly connected between the motor (31) and the groove (33); The outer surface of the lower end of the flaw detector (1) is provided with a spray coupling agent coating component (4), the coating component (4) comprising a flow channel (42), the flow channel (42) being designed as an annular structure and surrounding the ultrasonic probe (10), the outer surface of the flaw detector (1) being provided with an embedding groove (40) communicating with the flow channel (42), an infusion tube (43) for conveying the coupling agent being embedded in the embedding groove (40), and the end of the flow channel (42) being designed as an inclined structure.

2. The device for detecting internal corrosion of a pressure pipeline according to claim 1, characterized in that: The outer surface of the infusion tube (43) is provided with a socket (411), and a valve plate (41) is slidably connected inside the socket (411). The valve plate (41) and the socket (411) are adapted to each other and are sealed. The height of the socket (411) is smaller than the height of the infusion tube (43), and the end of the valve plate (41) extends to the outside of the socket (411).

3. The internal corrosion detection device for a pressure pipeline according to claim 2 is characterized in that: The outer surface of the valve plate (41) is rotatably connected to a connecting rod (44) via a rotating shaft. The end of the connecting rod (44) away from the valve plate (41) is an annular structure, and a connecting rod (49) is rotatably connected inside the connecting rod. One end of the connecting rod (49) is fixedly connected to a turntable 1 (48), and the other end is fixedly connected to a turntable 2 (51). The axes of the turntable 1 (48) and the turntable 2 (51) coincide with each other. The end of the turntable 1 (48) away from the connecting rod (49) is rotatably connected to a bearing (47). The bearing (47) is rotatably connected to the flaw detector (1). A counterweight (45) is provided below the annular outer surface of the turntable 2 (51).

4. The internal corrosion detection device for a pressure pipeline according to claim 3 is characterized in that: A telescopic rod (54) is fixedly connected to the annular outer surface of the turntable (51), and a telescopic sleeve (52) is sleeved on the annular outer surface of the telescopic rod (54). The end of the telescopic sleeve (52) away from the turntable (51) is fixedly connected to the counterweight (45), and the end of the telescopic sleeve (52) away from the flaw detector (1) is fixedly connected to a guide rod (53). A fixing rod (50) is fixedly connected to the outer surface of the flaw detector (1) at the position of the central circular hole of the bearing (47). The fixing rod (50) passes through the turntable (48) and the turntable (51), and the end of the fixing rod (50) is fixedly connected to a disk wheel (46). A guide groove (55) is formed on the outer surface of the disk wheel (46) close to the flaw detector (1), and the guide rod (53) is located inside the guide groove (55).

5. The device for detecting internal corrosion of a pressure pipeline according to claim 4, characterized in that: The number of the guide grooves (55) is two groups, and the two groups are symmetrically distributed with the telescopic sleeve (52) as the symmetry axis. The two groups of guide grooves (55) are interconnected to form a closed loop, and the guide grooves (55) are designed as a spiral structure.

6. The device for detecting internal corrosion of a pressure pipeline according to claim 1, characterized in that: The chain (22) is fixedly connected to an outer surface away from the cross bar (20) with a plurality of groups of protrusions (21), and a ball is embedded in the outer surface of the lower end of the protrusion (21). A sliding block (12) is fixedly connected to one side of the hook (13), and an upper outer surface of the sliding block (12) is rotatably connected to an adjusting rod (15) via a rotating shaft. The outer surface of the adjusting rod (15) is provided with a thread. A limiting block (11) threadedly connected to the adjusting rod (15) is fixedly connected to the outer surface of the flaw detector (1) at a position corresponding to the adjusting rod (15). The sliding block (12) is designed as a rectangular structure, and one end of the sliding block is in contact with the outer surface of the flaw detector (1).

7. The device for detecting internal corrosion of a pressure pipeline according to claim 6, characterized in that: The hook (13) is formed by bending a sheet of metal. A notch (16) is formed at one end of the limiting block (11) away from the flaw detector (1). A gear (14) is rotatably connected to the notch (16) via a rotating shaft and is threadedly meshed with the outer surface of the adjusting rod (15).

8. The device for detecting internal corrosion of a pressure pipeline according to claim 1, characterized in that: The moving assembly (3) further comprises a slide plate (35), a slide groove (34) is provided at a position on the inner surface of the groove (33) corresponding to the slide plate (35), an end of the slide plate (35) is located inside the slide groove (34), a storage cavity (391) is provided inside the flaw detector (1) at a position corresponding to the motor (31), a matching extrusion plate (393) is slidably connected inside the storage cavity (391), a spring (39) is fixedly connected at a position corresponding to the storage cavity (391) on the outer surface of the lower end of the extrusion plate (393), and a spring (39) is fixedly connected at a position corresponding to the storage cavity (391). The outer surface of the upper end of the motor (31) is fixedly connected to the storage cavity (391). A lifting rod (394) is provided, the upper end of which extends into the storage cavity (391) and is fixedly connected to the extrusion plate (393); an annular groove (36) is provided on the outer surface of the lower end of the flaw detector (1); a lifting ring (38) is slidably connected inside the annular groove (36); a silicone ring (37) is fixedly connected to the outer surface of the lower end of the lifting ring (38); a second spring (381) is fixedly connected between the lifting ring (38) and the annular groove (36); a channel (392) is provided between the annular groove (36) and the storage cavity (391), and the two are connected via the channel (392).

9. The device for detecting internal corrosion of a pressure pipeline according to claim 8, characterized in that: The annular groove (36) is located outside the flow channel (42), the silicone ring (37) is of hollow structure design, and through holes (382) are provided on the upper outer surfaces of the silicone ring (37) and the lifting ring (38).

Images