Pressure pipeline nondestructive testing equipment and testing method

Abstract

The present invention discloses a nondestructive testing device and method for pressure pipelines. The device comprises a magnetized wire, a sealing plate, a coaxially connected rotating tube and a fixed tube, each of which is coaxially fixedly mounted with a bracket, and an air intake pipe is sealed on the sealing plate. Advantageous effects: Because the device rotates while advancing within the pipeline, it can inspect all areas of the pipeline's inner wall after traveling from one end of the pipeline to the other, eliminating the need for the device to travel back and forth within the pipeline. This significantly reduces testing time and significantly improves testing efficiency.

Description

Technical Field

[0001] The present invention relates to the field of pipeline detection, and in particular to a non-destructive detection device and a detection method for a pressure pipeline. Background Art

[0002] Currently, most of the common automated testing equipment on the market that uses magnetic particles for non-destructive testing of pressure pipelines can only perform automated testing on the outer wall of the pipeline and cannot be used for non-destructive testing of the inner wall of the pipeline. Even if there are a few devices specifically suitable for non-destructive testing of the inner wall of the pipeline, most of these devices are not mature enough and there will be many problems during use.

[0003] For example, the patent publication number CN111380951B shows a device suitable for non-destructive testing of the inner wall of a pipeline. However, the device has problems such as low testing efficiency and long testing time. Because it cannot rotate around the central axis of the pipeline during the testing process, it can only test a certain area of ​​the inner wall of the pipeline. Therefore, it needs to move back and forth in the pipeline multiple times to test all areas of the inner wall of the pipeline.

[0004] For example, the patent with publication number CN109270086B shows a device specifically used for non-destructive testing of welds on the inner wall of a pipeline. The problem with this device is that it cannot be applied to the inspection of the entire inner wall of the pipeline when the inner diameter of the pipeline is large. Because when the inner diameter of the pipeline is large, the volume and weight of the entire device are also large, the manufacturing cost is high, and a large amount of magnetic suspension fluid is required to complete the inspection of the entire inner wall of the pipeline. The volume of the magnetic suspension fluid cylinder for storing the corresponding magnetic suspension fluid will be very large, resulting in a heavy load on the mounting frame and difficulty in moving the equipment. At the same time, when the rotating mechanism drives the mounting frame to rotate, it is very easy for the fixed seat to rotate and the walking wheel to slip, affecting the inspection. Especially when the inner wall of the pipeline is relatively smooth, the rotation of the mounting frame with a large driving load can easily drive the walking wheel to slide against the inner wall of the pipeline. Summary of the Invention

[0005] The main purpose of the present invention is to provide a pressure pipeline non-destructive testing device and testing method, aiming to solve the problem that the existing equipment used for non-destructive testing of pipeline inner walls has low detection efficiency and is not suitable for non-destructive testing of pressure pipelines with larger inner diameters.

[0006] To solve the above problems, the present invention proposes a pressure pipeline nondestructive testing device, comprising a magnetized wire, a sealing plate, a rotating tube and a fixed tube connected in a coaxial rotation, wherein a bracket is coaxially fixedly mounted on the rotating tube and the fixed tube, and an air intake pipe is sealed on the sealing plate;

[0007] A mounting plate is coaxially and sealedly fixedly mounted on the fixed tube, a sealing ring is coaxially sleeved outside the mounting plate, the sealing ring is sealedly connected to the mounting plate, and an air outlet is provided on the mounting plate;

[0008] One end of the fixed tube is sealed and plugged with a sealing plug;

[0009] A fan is coaxially fixedly mounted on the rotary tube, the fan being close to the air outlet. The airflow ejected from the air outlet blows toward the fan, driving the fan to drive the rotary tube to rotate. A third mounting tube, a second mounting rod, a second mounting tube, and the fan are fixedly mounted on the rotary tube in sequence along the axial direction.

[0010] The end of the mounting tube 3 away from the rotary tube is rotatably mounted with a nozzle, and the nozzle is connected to an infusion tube, which sequentially passes through the mounting tube 3, the rotary tube, the fixed tube, the sealing plug, and the sealing plate, and is sealed and fixedly connected to the sealing plug and the sealing plate;

[0011] There are multiple second mounting rods, which are spaced apart. The magnetized wire is slidably connected to the multiple second mounting rods and can rotate on the second mounting rods. One end of the magnetized wire is movably inserted into the rotating tube and sequentially passes through the fixed tube, the sealing plug, and the sealing plate. The magnetized wire is slidably and hermetically connected to the sealing plug, and the magnetized wire is fixedly and hermetically connected to the sealing plate.

[0012] A camera is rotatably mounted on the end of the second mounting tube away from the rotating tube, and the camera is connected to a wire that passes through the second mounting tube, the rotating tube, the fixed tube, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected to the sealing plug and the sealing plate.

[0013] In one embodiment, a section of the magnetized wire that is slidably connected to the plurality of mounting rods is parallel to the axis of the rotary tube;

[0014] When the rotating tube and the fixed tube are located in the pressure pipe, the rotating tube, the fixed tube and the pressure pipe are coaxial, and a section of the magnetized wire that is slidably connected to the plurality of mounting rods is close to the inner wall of the pressure pipe.

[0015] In one embodiment, the magnetized wire moves through the fixed tube;

[0016] The other end of the magnetized wire is movably extended into the rotating tube and extends from the end of the rotating tube away from the fixed tube;

[0017] When the rotating pipe and the fixed pipe are located in the pressure pipe, the magnetized wire passes through the pressure pipe.

[0018] In one embodiment, an annular groove is provided on the wall of the hole on the sealing plug for the magnetized wire to pass through, and the annular groove is connected to an oil filling pipe. One end of the oil filling pipe is plug-in sealed and fixedly connected to the sealing plug and communicates with the annular groove. The other end of the oil filling pipe passes through the sealing plate and is sealed and fixedly connected to the sealing plate. The other end of the oil filling pipe is connected to an oil pump.

[0019] In one embodiment, the sealing plate is plugged and sealed and fixedly connected to one end of the pressure pipe;

[0020] The rotary tube can be elastically bent.

[0021] In one embodiment, the bracket includes an inner ring and an outer ring that are concentrically and spaced apart, the inner ring and the outer ring being fixedly connected by a plurality of mounting rods, and a ball seat is mounted on an end of each mounting rod away from the inner ring and the outer ring, and a rolling ball is rotatably mounted on the ball seat;

[0022] When the rotating tube and the fixed tube are located in the pressure pipe, the rolling balls are in rolling contact with the inner wall of the pressure pipe;

[0023] The plurality of mounting rods are distributed in a centrally symmetrical manner, and the diameter of the rolling ball located below the fixing tube is larger than the diameters of the other rolling balls on the bracket.

[0024] In one embodiment, when the rotating tube and the fixed tube are located in the pressure pipe, the sealing ring is connected to the inner wall of the pressure pipe in a sliding and sealing manner. At this time, high-pressure gas is injected into the pressure pipe through the air inlet pipe, which can push the sealing ring to slide close to the inner wall of the pressure pipe, and eject air through the air outlet to blow towards the fan, driving the fan to rotate.

[0025] In one embodiment, when the rotating pipe and the fixed pipe are located in the pressure pipe, the nozzle and the camera are close to the inner wall of the pressure pipe.

[0026] In one embodiment, a mounting tube 1 is fixedly mounted on the rotary tube between the mounting tube 2 and the fan, an air suction cylinder is rotatably mounted on one end of the mounting tube 1 away from the rotary tube, the air suction cylinder is connected to one end of the exhaust pipe, the other end of the exhaust pipe passes through the mounting tube 1, the rotary tube, the fixed tube, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected to the sealing plug and the sealing plate, and the other end of the exhaust pipe is connected to a filter and an exhaust pump;

[0027] When the rotary pipe and the fixed pipe are located in the pressure pipe, the suction cylinder is close to the inner wall of the pressure pipe. One end of the suction cylinder close to the inner wall of the pressure pipe is open and is provided with a brush wire, which contacts the inner wall of the pressure pipe.

[0028] In addition, the present invention also proposes a pressure pipeline nondestructive testing method, which uses any of the above-mentioned pressure pipeline nondestructive testing equipment to perform the following steps:

[0029] Insert the magnetized wire through the pressure pipe, then place the rotating pipe and the fixed pipe into one end of the pressure pipe, and seal one end of the pressure pipe with a sealing plate;

[0030] High-pressure gas is injected into the pressure pipe through the air inlet pipe to push the sealing ring to slide against the inner wall of the pressure pipe, and the air is ejected through the air outlet to blow towards the fan, driving the fan to drive the rotary tube to rotate.

[0031] The magnetic suspension is delivered to the nozzle through the liquid delivery tube, and the nozzle spirally advances in the pressure pipe to spray the magnetic suspension on the inner wall of the pressure pipe;

[0032] A magnetized wire is passed through, wherein a section of the magnetized wire connected to the plurality of mounting rods 2 is spirally advanced in the pressure pipe to magnetize the pressure pipe;

[0033] The camera is turned on and spirally moves forward in the pressure pipe to capture images of the inner wall of the pressure pipe, and transmits the images to a computer through a wire. Beneficial effects

[0034] 1. The pressure pipeline nondestructive testing equipment of the present application injects high-pressure air into the pipeline to drive the equipment to move axially along the pipeline and rotate around the central axis of the pipeline. The equipment does not have a large motor to drive the equipment to move axially along the pipeline and rotate around the central axis of the pipeline. The equipment does not carry a container for storing magnetic suspension. It is light in weight, easy to move and rotate, fast in speed and high in efficiency. It not only improves the detection efficiency, but also solves the problems of heavy weight, difficulty in moving and rotating the equipment. It is very suitable for use in occasions where the inner diameter of the pipeline is large and the inner wall is smooth.

[0035] 2. Since the equipment rotates while moving forward in the pipeline, it can complete the inspection of all areas of the inner wall of the pipeline after moving from one end of the pipeline to the other end. There is no need for the equipment to move back and forth in the pipeline, which greatly saves inspection time and significantly improves inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 It is a structural schematic diagram of a pressure pipeline nondestructive testing device of the present invention;

[0038] Figure 2 Schematic diagram of the structure of the stent of the present invention;

[0039] Figure 3 yes Figure 1 A magnified view of part A in FIG;

[0040] Figure 4 yes Figure 1 A magnified view of part B in FIG;

[0041] Figure 5 yes Figure 1Enlarged view of part C in FIG;

[0042] Figure 6 yes Figure 1 Enlarged view of part D in .

[0043] The following are the descriptions of the reference numerals:

[0044] 1. Pressure pipe; 2. Rotating pipe; 3. Fixed pipe; 4. Connecting ring; 5. Mounting ring; 6. Bearing 1;

[0045] 7. Bracket; 71. Inner ring; 72. Mounting rod 1; 73. Outer ring; 74. Ball seat; 75. Rolling ball;

[0046] 8. Mounting plate; 9. Sealing ring; 10. Air outlet; 11. Fan; 12. Mounting pipe 1; 13. Exhaust pipe; 14. Suction cylinder; 15. Bearing 2; 16. Brush; 17. Mounting pipe 2; 18. Wire; 19. Camera; 20. Computer; 21. Filter; 22. Exhaust pump; 23. Mounting rod 2; 24. Magnetized wire; 25. Sealing plug; 26. Annular groove; 27. Oil filling pipe; 28. Threading hole; 29. ​​Mounting pipe 3; 30. Infusion tube; 31. Nozzle; 32. Sealing plate; 33. Intake pipe. DETAILED DESCRIPTION

[0047] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The present invention proposes a non-destructive testing device for pressure pipelines. The non-destructive testing device for pressure pipelines drives the device to move axially along the pipeline and rotate around the central axis of the pipeline in the pipeline by injecting high-pressure air into the pipeline. The device does not provide a large motor to drive the device to move axially along the pipeline and rotate around the central axis of the pipeline in the pipeline. The device does not carry a container for storing magnetic suspension, is light in weight, and can move and rotate easily. The moving and rotating speeds are fast and efficient, which not only improves the detection efficiency, but also solves the problems of the heavy weight of the device and the difficulty of moving and rotating. The device is very suitable for use in occasions where the inner diameter of the pipeline is large and the inner wall is smooth. In addition, since the device rotates while moving forward in the pipeline, the device completes the detection of all areas of the inner wall of the pipeline after moving from one end of the pipeline to the other end. There is no need for the device to move back and forth in the pipeline, which greatly saves detection time and significantly improves detection efficiency.

[0052] Specifically, in one embodiment of the invention, Figure 1 As shown, the pressure pipeline nondestructive testing equipment includes a magnetized wire 24, a sealing plate 32, a rotating tube 2 and a fixed tube 3 connected to each other in a coaxial rotation, as shown in FIG. Figure 4 As shown, a mounting ring 5 is coaxially sleeved outside the rotating tube 2 and the fixed tube 3. The mounting ring 5 is rotationally connected to the rotating tube 2 through a bearing 6. The mounting ring 5 is fixedly connected to the fixed tube 3 through a connecting ring 4. The magnetized wire 24 is used to magnetize the pressure pipe 1. The sealing plate 32 is plugged and sealed and fixedly connected to one end of the pressure pipe 1. The sealing plate 32 is used to seal one end of the pressure pipe 1, and then high-pressure air can be injected into the pressure pipe 1 to drive the pressure pipe non-destructive testing equipment to move axially forward in the pressure pipe 1.

[0053] In this embodiment, if Figure 1As shown, the rotating pipe 2 and the fixed pipe 3 are coaxially fixed with a bracket 7, which keeps the rotating pipe 2 and the fixed pipe 3 coaxial with the pressure pipe 1 and facilitates the axial movement of the pressure pipe nondestructive testing equipment in the pressure pipe 1. Specifically, Figure 2 As shown, the bracket 7 includes an inner ring 71 and an outer ring 73 that are concentric and spaced apart. The inner ring 71 and the outer ring 73 are fixedly connected by a plurality of mounting rods 72. Preferably, the plurality of mounting rods 72 are symmetrically distributed along the center. A ball seat 74 is fixedly mounted on one end of each mounting rod 72 away from the inner ring 71 and the outer ring 73. A rolling ball 75 is rotatably mounted on the ball seat 74. The rolling ball 75 can rotate around any ball diameter in the ball seat 74. When the rotary tube 2 and the fixed tube 3 are located in the pressure pipe 1, the rolling ball 75 is in rolling contact with the inner wall of the pressure pipe 1. Such a design facilitates the axial forward movement of the pressure pipeline nondestructive testing equipment in the pressure pipeline 1. In addition, the ball diameter of the rolling ball 75 located below the fixed pipe 3 is larger than the ball diameter of the other rolling balls 75 on the bracket 7 of the fixed pipe 3. Such a design can prevent the airflow ejected from the air outlet 10 from blowing toward the fan 11, and the driving fan 11 drives the rotary pipe 2 to rotate, causing the fixed pipe 3 to rotate, causing the exhaust pipe 13, the wire 18, the oil filling pipe 27, and the infusion pipe 30 to be tangled into a ball, affecting the normal operation of the equipment, and ensuring that the fixed pipe 3 does not rotate and the rotary pipe 2 rotates stably.

[0054] In this embodiment, if Figure 1 As shown, an air inlet pipe 33 is sealed on the sealing plate 32 , and an external high-pressure gas source can be injected into the pressure pipe 1 through the air inlet pipe 33 .

[0055] In this embodiment, if Figure 1 As shown, a mounting plate 8 is coaxially and sealedly fixedly mounted on the fixed tube 3, a sealing ring 9 is coaxially sleeved on the outer circumference of the mounting plate 8, and the sealing ring 9 is sealed and fixedly connected to the outer circumference of the mounting plate 8. An air outlet 10 is provided on the mounting plate 8, and a sealing plug 25 is sealed and plugged into one end of the fixed tube 3. The sealing plug 25 seals one end of the fixed tube 3 so that Figure 1 The area between the middle mounting plate 8 and the sealing plate 32 constitutes a closed space, achieving the technical effect that the high-pressure gas injected into the pressure pipe 1 through the air intake pipe 33 can push the sealing ring 9 to slide close to the inner wall of the pressure pipe 1. Specifically, when the rotary pipe 2 and the fixed pipe 3 are located in the pressure pipe 1, the sealing ring 9 is connected to the inner wall of the pressure pipe 1 in a sliding seal. At this time, the high-pressure gas injected into the pressure pipe 1 through the air intake pipe 33 can push the sealing ring 9 to slide close to the inner wall of the pressure pipe 1 to drive the pressure pipe non-destructive testing equipment to move axially forward in the pressure pipe 1, and eject air through the air outlet 10 to blow towards the fan 11, driving the fan 11 to drive the rotary pipe 2 to rotate.

[0056] In this embodiment, the material of the sealing ring 9 is preferably rubber. With this design, the outer edge of the sealing ring 9 and the inner wall of the pressure pipe 1 can be tightly pressed against each other to achieve a sliding and sealing connection between the two.

[0057] In this embodiment, if Figure 1 As shown, a fan 11 is coaxially fixedly mounted on the rotary tube 2 , and the fan 11 is close to the air outlet 10 . The airflow ejected from the air outlet 10 blows toward the fan 11 , driving the fan 11 to drive the rotary tube 2 to rotate.

[0058] In this embodiment, if Figure 1 As shown, the rotating tube 2 is fixedly mounted with the third mounting tube 29, the second mounting rod 23, the second mounting tube 17, and the fan 11 in sequence along the axial direction. Figure 6 As shown, the installation pipe 3 29 is rotatably mounted on one end away from the rotary pipe 2 with a nozzle 31, the nozzle 31 is close to the inner wall of the pressure pipe 1, and the nozzle 31 is connected to one end of the infusion pipe 30, as shown in FIG. Figure 1 、 Figure 3 、 Figure 4 、 Figure 6 As shown, the other end of the infusion tube 30 passes through the mounting tube 3 29, the rotary tube 2, the fixed tube 3, the sealing plug 25, and the sealing plate 32 in sequence, and is sealed and fixedly connected to the sealing plug 25 and the sealing plate 32. The other end of the infusion tube 30 is connected to the oil pump, and the magnetic suspension is transported into the infusion tube 30 through the oil pump, and then the magnetic suspension is sprayed on the inner wall of the pressure pipe 1 with the help of the nozzle 31.

[0059] In this embodiment, if Figure 1 As shown, there are multiple mounting rods 23, and they are arranged at intervals. The magnetized wire 24 is slidably connected to the multiple mounting rods 23 and can rotate on the mounting rods 23. One end of the magnetized wire 24 is movably extended into the rotating tube 2 and passes through the fixed tube 3, the sealing plug 25, and the sealing plate 32 in sequence. The magnetized wire 24 is slidably and sealedly connected to the sealing plug 25. This design neither affects the sealing performance of the sealing plug 25 nor affects the axial advancement of the pressure pipeline non-destructive testing equipment in the pressure pipeline 1. The magnetized wire 24 is sealed and fixedly connected to the sealing plate 32. Before the pressure pipeline non-destructive testing equipment moves axially forward in the pressure pipeline 1, the magnetized wire 24 has already passed through the pressure pipeline 1. During the axial advancement of the pressure pipeline non-destructive testing equipment in the pressure pipeline 1, the magnetized wire 24 does not follow it to move axially in the pressure pipeline 1 synchronously, so the magnetized wire 24 is slidably and sealedly connected to the sealing plug 25. In addition, the magnetized wire 24 movably passes through the fixed tube 3, as shown in FIG. Figure 4 As shown, a threading hole 28 is provided on the wall of the rotating tube 2 for the magnetized wire 24 to pass through and extend into the rotating tube 2. The hole wall of the threading hole 28 is chamfered to prevent the magnetized wire 24 from sliding relative to the rotating tube 2.

[0060] In this embodiment, if Figure 1 As shown, a section of the magnetizing wire 24 that is slidably connected to the plurality of mounting rods 23 is parallel to the axis of the rotating pipe 2. When the rotating pipe 2 and the fixed pipe 3 are located in the pressure pipe 1, the rotating pipe 2, the fixed pipe 3, and the pressure pipe 1 are coaxial, and a section of the magnetizing wire 24 that is slidably connected to the plurality of mounting rods 23 is close to the inner wall of the pressure pipe 1. This design allows the pressure pipe 1 to be magnetized through this section of the magnetizing wire 24, which is very suitable for magnetizing pressure pipes 1 with larger diameters and thicker walls.

[0061] In this embodiment, if Figure 1 As shown, the other end of the magnetized wire 24 is movably extended into the rotating tube 2 and extends from the end of the rotating tube 2 away from the fixed tube 3. Of course, in other embodiments, the other end of the magnetized wire 24 may not extend into the rotating tube 2 and extend from the end of the rotating tube 2 away from the fixed tube 3.

[0062] In this embodiment, the sealing plug 25 is made of rubber. With this design, the sealing plug 25 and the outer wall of the magnetized wire 24 can be tightly attached and squeezed against each other to achieve sliding sealing between the two. Furthermore, in this embodiment, Figure 3 As shown, an annular groove 26 is provided on the wall of the hole on the sealing plug 25 for the magnetized wire 24 to pass through, and an oil filling pipe 27 is connected to the annular groove 26. One end of the oil filling pipe 27 is plugged and sealed and fixedly connected to the sealing plug 25 and communicates with the annular groove 26. The other end of the oil filling pipe 27 passes through the sealing plate 32 and is sealed and fixedly connected to the sealing plate 32. The other end of the oil filling pipe 27 is connected to an oil pump. With this design, lubricating oil can be added to the annular groove 26 by the oil pump, reducing the sliding resistance between the magnetized wire 24 and the sealing plug 25, which is beneficial for the pressure pipeline non-destructive testing equipment to move axially forward in the pressure pipeline 1.

[0063] In this embodiment, if Figure 1 and Figure 5 As shown, a camera 19 is rotatably mounted on one end of the mounting tube 2 away from the rotating tube 2. The camera 19 is close to the inner wall of the pressure pipe 1 and is connected to a wire 18. Figure 1 、 Figure 3-Figure 5 As shown, the wire 18 passes through the second mounting tube 17, the rotating tube 2, the fixed tube 3, the sealing plug 25, and the sealing plate 32 in sequence, and is sealed and fixedly connected to the sealing plug 25 and the sealing plate 32. One end of the wire 18 extending out of the sealing plate 32 is connected to the computer 20. With this design, the image can be transmitted to the computer 20 through the wire 18, and then displayed and stored on the computer 20 for viewing.

[0064] Further, such as Figure 1 and Figure 5As shown, a mounting pipe 12 is fixedly mounted on the rotating pipe 2 between the mounting pipe 2 17 and the fan 11. An air suction cylinder 14 is rotatably mounted on the end of the mounting pipe 12 away from the rotating pipe 2 through a bearing 2 15. When the rotating pipe 2 and the fixed pipe 3 are located in the pressure pipe 1, the air suction cylinder 14 is close to the inner wall of the pressure pipe 1. Figure 1 、 Figure 3-Figure 5 As shown, the suction cylinder 14 is connected to one end of the exhaust pipe 13, and the other end of the exhaust pipe 13 passes through the installation pipe 12, the rotary pipe 2, the fixed pipe 3, the sealing plug 25, and the sealing plate 32 in sequence, and is sealed and fixedly connected with the sealing plug 25 and the sealing plate 32. The other end of the exhaust pipe 13 is connected to the filter 21 and the exhaust pump 22. The end of the suction cylinder 14 close to the inner wall of the pressure pipe 1 is open and is provided with a brush 16. The brush 16 contacts the inner wall of the pressure pipe 1. The rotary pipe 2 rotates The brush wire 16 is driven to brush the inner wall of the pressure pipe 1 to brush off the magnetic suspension. At the same time, after the vacuum pump 22 is started, the air near the brush wire 16 is extracted into the suction cylinder 14, thereby driving the magnetic suspension on the brush wire 16 into the suction pipe 13, and finally into the filter 21 for filtration and oil-water separation, filtering out magnetic powder and moisture. This design realizes that the inner wall of the pressure pipe 1 is cleaned in time after the non-destructive testing of the pressure pipe 1 is completed, eliminating the trouble of subsequent special cleaning of the pipe, saving time and effort.

[0065] In this embodiment, when the pressure pipeline nondestructive testing equipment is moving axially in the pressure pipeline 1, the rotation of the rotary tube 2 drives the nozzle 31, the camera 19, the suction cylinder 14, and the magnetized wire 24 to rotate, so that the nozzle 31, the camera 19, the suction cylinder 14, and the magnetized wire 24 on the second mounting rod 23 are spirally advanced. The nozzle 31 spirally advances to spray magnetic suspension on all areas of the inner wall of the pressure pipeline 1, the magnetized wire 24 on the second mounting rod 23 spirally advances to magnetize all areas of the pressure pipeline 1, the camera 19 spirally advances to photograph all areas of the inner wall of the pressure pipeline 1, and the suction cylinder 14 spirally advances to scrub all areas of the inner wall of the pressure pipeline 1, thereby completing the inspection of all areas of the inner wall of the pipeline after the equipment moves from one end of the pipeline to the other end, without the need for the equipment to move back and forth in the pipeline, greatly saving inspection time and significantly improving inspection efficiency.

[0066] In this embodiment, the pressure pipeline nondestructive testing equipment is driven by injecting high-pressure air into the pipeline to move the equipment axially along the pipeline and rotate around the central axis of the pipeline. The equipment does not have a large motor to drive the equipment to move axially along the pipeline and rotate around the central axis of the pipeline. The equipment does not carry a container for storing magnetic suspension, so the equipment is light in weight, and high-pressure air drives its movement and rotation to be easily achieved. Moreover, the movement and rotation speeds are fast and the detection efficiency is high, which not only improves the detection efficiency, but also solves the problems of the equipment's own weight, movement and rotation difficulties. The high-pressure air drives the equipment to move axially along the pipeline and rotate around the central axis of the pipeline in the pipeline without being affected by the smooth inner wall of the pipeline. It is very suitable for use in occasions where the inner diameter of the pipeline is large and the inner wall is smooth.

[0067] In this embodiment, the nozzle 31 is rotationally connected to the mounting tube three 29, the magnetized wire 24 is rotatably slidably connected to the mounting rod two 23, the camera 19 is rotationally connected to the mounting tube two 17, and the suction cylinder 14 is rotationally connected to the mounting tube one 12. This design ensures that the infusion tube 30, the magnetized wire 24, the wire 18, and the exhaust tube 13 in the fixed tube 3 are not wound around when the rotating tube 2 rotates, thereby preventing the infusion tube 30, the magnetized wire 24, the wire 18, and the exhaust tube 13 from being twisted off.

[0068] In this embodiment, if Figure 1 As shown, the liquid delivery pipe 30, the oil injection pipe 27, the wire 18, and the air extraction pipe 13 have sufficient length between the fixed pipe 3 and the sealing plate 32 to ensure that the pressure pipeline nondestructive testing equipment can be moved from one end of the pressure pipeline 1 to the other end.

[0069] In this embodiment, the rotary tube 2 is elastically bendable. This design enables the pressure pipeline non-destructive testing equipment to pass through the curved section of the pressure pipeline 1, thereby expanding the application range of the equipment.

[0070] In addition, the present invention also proposes a pressure pipeline nondestructive testing method, which uses any of the above-mentioned pressure pipeline nondestructive testing equipment to perform the following steps:

[0071] S1. Insert the magnetized wire 24 through the pressure pipe 1, then place the rotating pipe 2 and the fixed pipe 3 into one end of the pressure pipe 1, and seal one end of the pressure pipe 1 with a sealing plate 32;

[0072] S2. High-pressure gas is injected into the pressure pipe 1 through the air inlet pipe 33 to push the sealing ring 9 to slide against the inner wall of the pressure pipe 1, and the air is ejected through the air outlet 10 to blow toward the fan 11, driving the fan 11 to drive the rotary pipe 2 to rotate;

[0073] S3, delivering the magnetic suspension to the nozzle 31 through the liquid delivery tube 30, and the nozzle 31 spirally moving forward in the pressure pipe 1 to spray the magnetic suspension on the inner wall of the pressure pipe 1;

[0074] S4, passing the electromagnetic wire 24, wherein a section of the magnetized wire 24 connected to the plurality of mounting rods 23 spirally advances in the pressure pipe 1 to magnetize the pressure pipe 1;

[0075] S5. Turn on the camera 19, which spirals forward in the pressure pipe 1 to capture an image of the inner wall of the pressure pipe 1 and transmits the image to the computer 20 via the wire 18;

[0076] S6. Start the vacuum pump 22 and use the brush wire 16 to brush the inner wall of the pressure pipe 1.

[0077] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A non-destructive testing device for pressure pipes, characterized in that: It includes a magnetized wire, a sealing plate, a rotating tube and a fixed tube connected in a coaxial rotation, wherein a bracket is coaxially fixedly mounted on the rotating tube and the fixed tube, and an air intake pipe is sealed on the sealing plate; A mounting plate is coaxially and sealedly fixedly mounted on the fixed tube, a sealing ring is coaxially sleeved outside the mounting plate, the sealing ring is sealedly connected to the mounting plate, and an air outlet is provided on the mounting plate; One end of the fixed tube is sealed and plugged with a sealing plug; A fan is coaxially fixedly mounted on the rotary tube, the fan being close to the air outlet. The airflow ejected from the air outlet blows toward the fan, driving the fan to drive the rotary tube to rotate. A third mounting tube, a second mounting rod, a second mounting tube, and the fan are fixedly mounted on the rotary tube in sequence along the axial direction. The end of the mounting tube 3 away from the rotary tube is rotatably mounted with a nozzle, and the nozzle is connected to an infusion tube, which sequentially passes through the mounting tube 3, the rotary tube, the fixed tube, the sealing plug, and the sealing plate, and is sealed and fixedly connected to the sealing plug and the sealing plate; There are multiple second mounting rods, which are spaced apart. The magnetized wire is slidably connected to the multiple second mounting rods and can rotate on the second mounting rods. One end of the magnetized wire is movably inserted into the rotating tube and sequentially passes through the fixed tube, the sealing plug, and the sealing plate. The magnetized wire is slidably and hermetically connected to the sealing plug, and the magnetized wire is fixedly and hermetically connected to the sealing plate. A camera is rotatably mounted on the end of the second mounting tube away from the rotating tube, and the camera is connected to a wire that passes through the second mounting tube, the rotating tube, the fixed tube, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected to the sealing plug and the sealing plate.

2. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: A section of the magnetized wire that is slidably connected to the plurality of mounting rods is parallel to the axis of the rotary tube; When the rotating tube and the fixed tube are located in the pressure pipe, the rotating tube, the fixed tube and the pressure pipe are coaxial, and a section of the magnetized wire that is slidably connected to the plurality of mounting rods is close to the inner wall of the pressure pipe.

3. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: The magnetized wire movably passes through the fixed tube; The other end of the magnetized wire is movably extended into the rotating tube and extends from the end of the rotating tube away from the fixed tube; When the rotating pipe and the fixed pipe are located in the pressure pipe, the magnetized wire passes through the pressure pipe.

4. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: An annular groove is provided on the wall of the hole on the sealing plug for the magnetized wire to pass through, and the annular groove is connected to an oil filling pipe. One end of the oil filling pipe is plug-sealed and fixedly connected to the sealing plug and communicates with the annular groove. The other end of the oil filling pipe passes through the sealing plate and is sealed and fixedly connected to the sealing plate. The other end of the oil filling pipe is connected to an oil pump.

5. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: The sealing plate is plugged and sealed and fixedly connected to one end of the pressure pipe; The rotary tube can be elastically bent.

6. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: The bracket includes an inner ring and an outer ring that are concentric and spaced apart, and the inner ring and the outer ring are fixedly connected by a plurality of mounting rods. A ball seat is installed on one end of each mounting rod away from the inner ring and the outer ring, and a rolling ball is rotatably installed on the ball seat. When the rotating tube and the fixed tube are located in the pressure pipe, the rolling balls are in rolling contact with the inner wall of the pressure pipe; The plurality of mounting rods are distributed in a centrally symmetrical manner, and the diameter of the rolling ball located below the fixing tube is larger than the diameters of the other rolling balls on the bracket.

7. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: When the rotating pipe and the fixed pipe are located in the pressure pipe, the sealing ring is connected to the inner wall of the pressure pipe in a sliding and sealing manner. At this time, the high-pressure gas injected into the pressure pipe through the air inlet pipe can push the sealing ring to slide close to the inner wall of the pressure pipe, and the air flow is ejected through the air outlet to blow towards the fan, driving the fan to rotate.

8. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: When the rotating pipe and the fixed pipe are located in the pressure pipe, the nozzle and the camera are close to the inner wall of the pressure pipe.

9. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: The rotary pipe is fixedly installed with a mounting pipe 1 between the mounting pipe 2 and the fan, and an air suction cylinder is rotatably installed on one end of the mounting pipe 1 away from the rotary pipe. The air suction cylinder is connected to one end of the exhaust pipe, and the other end of the exhaust pipe passes through the mounting pipe 1, the rotary pipe, the fixed pipe, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected to the sealing plug and the sealing plate. The other end of the exhaust pipe is connected to a filter and an exhaust pump; When the rotary pipe and the fixed pipe are located in the pressure pipe, the suction cylinder is close to the inner wall of the pressure pipe. One end of the suction cylinder close to the inner wall of the pressure pipe is open and is provided with a brush wire, which contacts the inner wall of the pressure pipe.

10. A nondestructive testing method for a pressure pipeline, characterized in that: The following steps are performed using a pressure pipeline nondestructive testing device according to any one of claims 1 to 9: Insert the magnetized wire through the pressure pipe, then place the rotating pipe and the fixed pipe into one end of the pressure pipe, and seal one end of the pressure pipe with a sealing plate; High-pressure gas is injected into the pressure pipe through the air inlet pipe to push the sealing ring to slide against the inner wall of the pressure pipe, and the air is ejected through the air outlet to blow towards the fan, driving the fan to drive the rotary tube to rotate. The magnetic suspension is delivered to the nozzle through the liquid delivery tube, and the nozzle spirally advances in the pressure pipe to spray the magnetic suspension on the inner wall of the pressure pipe; A magnetized wire is passed through, wherein a section of the magnetized wire connected to the plurality of mounting rods 2 is spirally advanced in the pressure pipe to magnetize the pressure pipe; The camera is turned on and spirally moves forward in the pressure pipe to capture images of the inner wall of the pressure pipe, and transmits the images to a computer through a wire.

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