Non-destructive testing equipment and method for pressure pipeline

Abstract

The invention discloses pressure pipeline nondestructive testing equipment and a testing method, the pressure pipeline nondestructive testing equipment comprises a magnetized electric wire, a sealing plate, a rotary pipe and a fixed pipe, the rotary pipe and the fixed pipe are coaxially and rotatably connected, supports are coaxially and fixedly installed on the rotary pipe and the fixed pipe, and an air inlet pipe is arranged on the sealing plate in a sealing mode. The device has the beneficial effects that the device automatically rotates in the process of advancing in the pipeline, so that all areas of the inner wall of the pipeline can be detected after the device walks from one end to the other end of the pipeline, the device does not need to walk back and forth in the pipeline, the detection time is greatly saved, and the detection efficiency is remarkably improved.

Description

Technical Field

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

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

[0003] For example, the patent with publication number CN111380951B shows a device suitable for non-destructive testing of the inner wall of a pipeline. The problem with this device is that the testing efficiency is relatively low and the testing takes a long 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 for many times to test all areas of the inner wall of the pipeline. Another example is a device specifically used for nondestructive testing of welds on the inner wall of a pipeline as shown in the patent with publication number CN109270086B. The problem with this device is that it cannot be used for testing the entire inner wall of the pipeline when the inner diameter of the pipeline is large. This is because when the inner diameter of the pipeline is large, the volume and weight of the entire device are also large, and the manufacturing cost is high. A large amount of magnetic suspension is required to complete the testing of the entire inner wall of the pipeline. The volume of the magnetic suspension cylinder for storing the corresponding magnetic suspension 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 also very easy for the fixed seat to rotate and the walking wheel to slip, affecting the detection. 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

[0004] The main purpose of the present invention is to provide a pressure pipeline nondestructive testing device and a testing method, aiming to solve the problem that the existing equipment used for nondestructive testing of pipeline inner walls has low testing efficiency and is not suitable for nondestructive testing of pressure pipelines with larger inner diameters.

[0005] In order to solve the above problems, the present invention proposes a non-destructive testing device for pressure pipes, comprising a magnetized wire, a sealing plate, a rotating pipe and a fixed pipe connected in a coaxial rotation, wherein the rotating pipe and the fixed pipe are coaxially fixedly mounted with a bracket, 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 sealingly connected to the mounting plate, and an air outlet is arranged on the mounting plate; A sealing plug is sealed and inserted at one end of the fixed tube; A fan is coaxially fixedly installed on the rotary tube, the fan is close to the air outlet, the airflow ejected from the air outlet blows toward the fan, the fan is driven to drive the rotary tube to rotate, and a third mounting tube, a second mounting rod, a second mounting tube, and the fan are fixedly arranged in sequence along the axial direction on the rotary tube; The end of the installation tube 3 away from the rotating tube is rotatably mounted with a nozzle, and the nozzle is connected to an infusion tube, which passes through the installation tube 3, the rotating tube, the fixed tube, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected with the sealing plug and the sealing plate; There are multiple mounting rods 2, which are arranged at intervals. The magnetized wire is slidably connected to the multiple mounting rods 2 and can rotate on the mounting rods 2. One end of the magnetized wire is movably extended into the rotating tube and passes through the fixed tube, the sealing plug, and the sealing plate in sequence. The magnetized wire is slidably and hermetically connected to the sealing plug, and the magnetized wire is sealed and fixedly connected to the sealing plate; A camera is rotatably mounted on one end of the second mounting tube away from the rotating tube, and the camera is connected to a wire. The wire 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.

[0006] 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; 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.

[0007] In one embodiment, the magnetized wire moves through the fixed tube; The other end of the magnetized wire movably extends into the rotating tube and extends out 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 runs through the pressure pipe.

[0008] 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 is communicated with the annular groove, the other end of the oil filling pipe passes through a sealing plate and is sealed and fixedly connected to the sealing plate, and the other end of the oil filling pipe is connected to an oil pump.

[0009] In one embodiment, the sealing plate is plug-in sealed and fixedly connected to one end of the pressure pipe; The rotary tube can be bent elastically.

[0010] In one embodiment, the bracket comprises an inner ring and an outer ring which are concentrically and spaced apart, the inner ring and the outer ring are fixedly connected by a plurality of mounting rods, a ball seat is mounted on one 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; When the rotating pipe and the fixed pipe are located in the pressure pipe, the rolling ball is in rolling contact with the inner wall of the pressure pipe; The plurality of mounting rods are centrally symmetrically distributed, and the diameter of the rolling ball located below the fixing pipe is larger than the diameters of other rolling balls on the bracket.

[0011] 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 seal. At this time, high-pressure gas is injected into the pressure pipe through the air inlet pipe to 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 toward the fan, driving the fan to rotate.

[0012] 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.

[0013] In one embodiment, a mounting tube 1 is fixedly installed on the rotary tube between the mounting tube 2 and the fan, an air suction cylinder is rotatably installed 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; When the rotating 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 provided with a brush wire, and the brush wire contacts the inner wall of the pressure pipe.

[0014] In addition, the present invention also proposes a pressure pipeline nondestructive testing method, using any one of the pressure pipeline nondestructive testing devices described above to perform the following steps: The magnetized wire is passed through the pressure pipe, and then the rotating pipe and the fixed pipe are placed at one end of the pressure pipe, and one end of the pressure pipe is sealed 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 flow is ejected through the air outlet to blow toward the fan, driving the fan to drive the rotary tube to rotate; The magnetic suspension is delivered to the nozzle through the infusion tube, and the nozzle spirally moves forward in the pressure pipe to spray the magnetic suspension on the inner wall of the pressure pipe; A magnetized wire is passed through, and a section of the magnetized wire connected to a plurality of mounting rods is spirally advanced in the pressure pipe to magnetize the pressure pipe; The camera is turned on, and the camera spirally moves forward in the pressure pipe to capture images of the inner wall of the pressure pipe, and transmits the images to the computer through a wire. Beneficial Effects

[0015] 1. The pressure pipeline nondestructive testing equipment of the present application injects high-pressure air into the pipeline to drive the equipment to move along the axial direction of 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 along the axial direction of the pipeline and rotate around the central axis of the pipeline. The equipment does not carry a container for storing magnetic suspension, is light in weight, easy to walk and rotate, fast in walking and rotating speed, and high in efficiency. It not only improves the detection efficiency, but also solves the problems of heavy weight, difficulty in walking and rotating of 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; 2. Since the equipment rotates while moving forward in the pipeline, the equipment will 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 the inspection time and significantly improves the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0017] Figure 1 It is a structural schematic diagram of a pressure pipeline nondestructive testing device of the present invention; Figure 2 It is a schematic diagram of the structure of the support of the present invention; Figure 3 yes Figure 1 A magnified view of part A in FIG. Figure 4 yes Figure 1 A magnified view of part B in FIG. Figure 5 yes Figure 1 The enlarged view of the C part in FIG. Figure 6 yes Figure 1 Enlarged view of part D in .

[0018] The following are the descriptions of the reference numerals: 1. Pressure pipe; 2. Rotating pipe; 3. Fixed pipe; 4. Connecting ring; 5. Mounting ring; 6. Bearing 1; 7. Bracket; 71. Inner ring; 72. Mounting rod 1; 73. Outer ring; 74. Ball seat; 75. Rolling ball; 8. Mounting plate; 9. Sealing ring; 10. Air outlet; 11. Fan; 12. Mounting tube one; 13. Exhaust pipe; 14. Suction cylinder; 15. Bearing two; 16. Brush wire; 17. Mounting tube two; 18. Wire; 19. Camera; 20. Computer; 21. Filter; 22. Exhaust pump; 23. Mounting rod two; 24. Magnetized wire; 25. Sealing plug; 26. Annular groove; 27. Oil filling pipe; 28. Threading hole; 29. ​​Mounting tube three; 30. Infusion tube; 31. Nozzle; 32. Sealing plate; 33. Intake pipe. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. 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 the field to implement. When the combination of technical solutions is 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.

[0023] The present invention proposes a nondestructive testing device for pressure pipelines. The nondestructive testing device for pressure pipelines drives the device to move along the axial direction of 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 have a large motor to drive the device to move along the axial direction of 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 is easy to move and rotate. The walking and rotating speeds are fast and the efficiency is high. This not only improves the detection efficiency, but also solves the problems of heavy weight, walking and rotating difficulties of the device. 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 during the process of 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. The device does not need to move back and forth in the pipeline, which greatly saves the detection time and significantly improves the detection efficiency.

[0024] 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 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, and the mounting ring 5 is rotationally connected to the rotating tube 2 through a bearing 6, and 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, and the sealing plate 32 is plugged and sealed and fixedly connected to one end of the pressure pipe 1, and 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.

[0025] In this embodiment, if Figure 1As shown, the rotating tube 2 and the fixed tube 3 are coaxially fixed with a bracket 7, and the bracket 7 keeps the rotating tube 2 and the fixed tube 3 coaxial with the pressure pipeline 1, and facilitates the pressure pipeline nondestructive testing equipment to move axially in the pressure pipeline 1. Specifically, as Figure 2 As shown, the bracket 7 includes an inner ring 71 and an outer ring 73 that are concentrically 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 in the center. A ball seat 74 is fixedly installed at one end of each mounting rod 72 away from the inner ring 71 and the outer ring 73. A rolling ball 75 is rotatably installed on the ball seat 74. The rolling ball 75 can rotate around any ball diameter in the ball seat 74. When the rotating 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 diameters of 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 fan 11 drives the rotating 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 rotating pipe 2 rotates stably.

[0026] 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 .

[0027] 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 outside the mounting plate 8, the sealing ring 9 is sealed and fixedly connected to the outer circumferential surface of the mounting plate 8, an air outlet 10 is arranged on the mounting plate 8, and a sealing plug 25 is sealed and plugged at one end of the fixed tube 3, and one end of the fixed tube 3 is sealed by the sealing plug 25, 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 rotating 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 flow through the air outlet 10 to blow toward the fan 11, driving the fan 11 to drive the rotating pipe 2 to rotate.

[0028] 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.

[0029] In this embodiment, if Figure 1 As shown, a fan 11 is coaxially fixedly installed 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.

[0030] 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 end of the installation pipe 3 29 away from the rotating pipe 2 is rotatably installed 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 installation tube 3 29, 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 with 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.

[0031] 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 movably extends 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 forward movement 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 penetrated the pressure pipeline 1, and during the axial forward movement of the pressure pipeline non-destructive testing equipment in the pressure pipeline 1, the magnetized wire 24 does not follow it to synchronously move axially in the pressure pipeline 1, 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 wall of the threading hole 28 is chamfered to avoid affecting the sliding of the magnetized wire 24 relative to the rotating tube 2.

[0032] In this embodiment, if Figure 1 As shown, a section of the magnetized 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 magnetized wire 24 that is slidably connected to the plurality of mounting rods 23 is close to the inner wall of the pressure pipe 1. With this design, the pressure pipe 1 can be magnetized through this section of the magnetized wire 24, which is very suitable for magnetizing operations of pressure pipes 1 with larger diameters and thicker walls.

[0033] In this embodiment, if Figure 1 As shown, the other end of the magnetized wire 24 movably extends into the rotating tube 2 and extends from one 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 one end of the rotating tube 2 away from the fixed tube 3.

[0034] 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 closely 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 hole wall of the sealing plug 25 for the magnetized wire 24 to pass through, and the annular groove 26 is connected to an oil filling pipe 27, one end of the oil filling pipe 27 is plugged and sealed and fixedly connected to the sealing plug 25, and is communicated 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, and 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 through 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.

[0035] In this embodiment, if Figure 1 and Figure 5 As shown, a camera 19 is rotatably mounted on one end of the mounting tube 17 away from the rotating tube 2. The camera 19 is close to the inner wall of the pressure pipe 1. The camera 19 is connected to a wire 18. Figure 1 , Figure 3-Figure 5 As shown, the wire 18 passes through the 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 with 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.

[0036] Further, such as Figure 1 and Figure 5As shown, a mounting tube 12 is fixedly mounted on the rotating tube 2 between the mounting tube 2 17 and the fan 11, and an air suction cylinder 14 is rotatably mounted on the end of the mounting tube 12 away from the rotating tube 2 through a bearing 2 15. When the rotating tube 2 and the fixed tube 3 are located in the pressure pipe 1, the air suction cylinder 14 is close to the inner wall of the pressure pipe 1, as shown in FIG. 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 rotating 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 wire 16. The brush wire 16 contacts the inner wall of the pressure pipe 1. The rotating 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 brushed clean in time after the non-destructive testing of the pressure pipe 1 is completed, eliminating the trouble of subsequent special cost for cleaning the pipe, saving time and effort.

[0037] In this embodiment, when the pressure pipeline nondestructive testing equipment is moving axially in the pressure pipeline 1, the rotation of the rotating 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 mounting rod 23 are spirally moved forward, the nozzle 31 is spirally moved forward to spray the magnetic suspension on all areas of the inner wall of the pressure pipeline 1, the magnetized wire 24 on the mounting rod 23 is spirally moved forward to magnetize all areas of the pressure pipeline 1, the camera 19 is spirally moved forward to photograph all areas of the inner wall of the pressure pipeline 1, and the suction cylinder 14 is spirally moved forward to scrub all areas of the inner wall of the pressure pipeline 1, so that the equipment 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, without the need for the equipment to move back and forth in the pipeline, which greatly saves the inspection time and significantly improves the inspection efficiency.

[0038] 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, and 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 heavy weight, walking and rotation difficulties of the equipment. The high-pressure air drives the equipment to move axially along the pipeline and rotate around the central axis of the pipeline without being affected by the smooth inner wall of the pipeline, and is very suitable for use in occasions where the inner diameter of the pipeline is large and the inner wall is smooth.

[0039] In this embodiment, the nozzle 31 is rotatably 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 rotatably connected to the mounting tube two 17, and the suction cylinder 14 is rotatably 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.

[0040] 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.

[0041] In this embodiment, the rotary tube 2 can be elastically bent. Such a 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.

[0042] In addition, the present invention also proposes a pressure pipeline nondestructive testing method, using any one of the pressure pipeline nondestructive testing devices described above to perform the following steps: S1, passing the magnetized wire 24 through the pressure pipe 1, then placing the rotating pipe 2 and the fixed pipe 3 into one end of the pressure pipe 1, and sealing one end of the pressure pipe 1 with a sealing plate 32; S2, injecting high-pressure gas into the pressure pipe 1 through the air inlet pipe 33 pushes the sealing ring 9 to slide against the inner wall of the pressure pipe 1, and ejects air through the air outlet 10 to blow toward the fan 11, driving the fan 11 to drive the rotary pipe 2 to rotate; S3, delivering the magnetic suspension to the nozzle 31 through the infusion tube 30, and the nozzle 31 spirally moves forward in the pressure pipe 1 to spray the magnetic suspension on the inner wall of the pressure pipe 1; S4, passing the magnetized wire 24, a section of the magnetized wire 24 connected to the plurality of mounting rods 23 spirally moves forward in the pressure pipe 1 to magnetize the pressure pipe 1; S5, turning on the camera 19, the camera 19 spirally moves 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 through the wire 18; S6, start the vacuum pump 22, and use the brush wire 16 to brush the inner wall of the pressure pipe 1.

[0043] 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 changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pressure pipeline nondestructive testing equipment, characterized in that: It includes a magnetized wire, a sealing plate, a rotating tube and a fixed tube connected in a coaxial rotation, the rotating tube and the fixed tube are coaxially fixedly mounted with a bracket, and the sealing plate is sealed with an air intake pipe; 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 sealingly connected to the mounting plate, and an air outlet is arranged on the mounting plate; A sealing plug is sealed and inserted at one end of the fixed tube; A fan is coaxially fixedly installed on the rotary tube, the fan is close to the air outlet, the airflow ejected from the air outlet blows toward the fan, the fan is driven to drive the rotary tube to rotate, and a third mounting tube, a second mounting rod, a second mounting tube, and the fan are fixedly arranged in sequence along the axial direction on the rotary tube; The end of the installation tube 3 away from the rotating tube is rotatably mounted with a nozzle, and the nozzle is connected to an infusion tube, which passes through the installation tube 3, the rotating tube, the fixed tube, the sealing plug, and the sealing plate in sequence, and is sealed and fixedly connected with the sealing plug and the sealing plate; There are multiple mounting rods 2, which are arranged at intervals. The magnetized wire is slidably connected to the multiple mounting rods 2 and can rotate on the mounting rods 2. One end of the magnetized wire is movably extended into the rotating tube and passes through the fixed tube, the sealing plug, and the sealing plate in sequence. The magnetized wire is slidably and hermetically connected to the sealing plug, and the magnetized wire is sealed and fixedly connected to the sealing plate; A camera is rotatably mounted on one end of the second mounting tube away from the rotating tube, and the camera is connected to a wire. The wire 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. A pressure pipeline nondestructive testing device as claimed in 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. A pressure pipeline nondestructive testing device as claimed in claim 1, characterized in that: The magnetized wire moves through the fixed tube; The other end of the magnetized wire movably extends into the rotating tube and extends out 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 runs through the pressure pipe.

4. A pressure pipeline nondestructive testing device as claimed in 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-in sealed and fixedly connected to the sealing plug and communicated with the annular groove, and 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 bent elastically.

6. A pressure pipeline nondestructive testing device as claimed in claim 1, characterized in that: The bracket comprises an inner ring and an outer ring which are concentrically and spaced apart, wherein the inner ring and the outer ring are fixedly connected via a plurality of mounting rods, and a ball seat is mounted on one 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; When the rotating pipe and the fixed pipe are located in the pressure pipe, the rolling ball is in rolling contact with the inner wall of the pressure pipe; The plurality of mounting rods are centrally symmetrically distributed, and the diameter of the rolling ball located below the fixing pipe is larger than the diameters of other rolling balls on the bracket.

7. The pressure pipeline nondestructive testing equipment according to claim 1, characterized in that: 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 seal. 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 eject air through the air outlet to blow toward 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 at one end of the mounting pipe 1 away from the rotary pipe, and 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 with the sealing plug and the sealing plate, and the other end of the exhaust pipe is connected with a filter and an exhaust pump; When the rotating 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 provided with a brush wire, and the brush wire 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: The magnetized wire is passed through the pressure pipe, and then the rotating pipe and the fixed pipe are placed at one end of the pressure pipe, and one end of the pressure pipe is sealed 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 flow is ejected through the air outlet to blow toward the fan, driving the fan to drive the rotary tube to rotate; The magnetic suspension is delivered to the nozzle through the infusion tube, and the nozzle spirally moves forward in the pressure pipe to spray the magnetic suspension on the inner wall of the pressure pipe; A magnetized wire is passed through, and a section of the magnetized wire connected to a plurality of mounting rods is spirally advanced in the pressure pipe to magnetize the pressure pipe; The camera is turned on, and the camera spirally moves forward in the pressure pipe to capture images of the inner wall of the pressure pipe, and transmits the images to the computer through a wire.

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