Pipeline internal corrosion detection device for pressure pipeline

Abstract

The invention discloses a pipeline internal corrosion detection device for a pressure pipeline, and relates to the technical field of pipeline detection. The device comprises a detection table, the detection table is provided with a rotary supporting mechanism used for supporting and driving a to-be-detected pipeline to rotate around the axis of the to-be-detected pipeline, the detection table is provided with a mounting table capable of axially moving in the to-be-detected pipeline, and the mounting table is provided with an electromagnetic ultrasonic probe; according to the invention, an external driving and internal detection mode is adopted, the pipeline is driven to rotate by the external rotary supporting mechanism, and the electromagnetic ultrasonic probe can form a continuous spiral scanning path on the inner wall of the pipeline in cooperation with the axial movement of the mounting table, so that the inner wall of the pipeline can be detected without omission in a full-coverage manner; when the defect is detected, scanning can be stopped immediately, the defect marking mechanism is triggered to operate, an annular marking ring is formed on the surface of the inner wall of the defect, in-situ and visual positioning of the defect is achieved, accurate guidance is provided for follow-up reinspection or repair, and therefore practicability is improved.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, and specifically to a device for detecting internal corrosion in pressure pipelines. Background Technology

[0002] As a key pressure-bearing equipment for transporting various media, the corrosion, cracks, and mechanical scratches on the inner wall of pressure pipelines are major hidden dangers affecting safe operation. Therefore, a comprehensive corrosion test must be carried out on the inner wall of the pipeline when it leaves the factory.

[0003] Existing detection methods typically involve placing a crawler equipped with detection sensors (such as magnetic flux leakage or ultrasonic sensors) into the pipeline and relying on its own drive for detection. These devices are usually complex in structure and expensive, and are cumbersome and inconvenient to deploy for factory inspection of large-diameter, short-section pipes. They also cannot guarantee detection coverage, are prone to missing areas, and affect the quality of inspection. More importantly, the defect signals detected by such devices are usually stored in the form of electronic data. After the inspection is completed, the defect location needs to be analyzed from a massive amount of data. It is impossible to locate the defect on the pipeline body intuitively and in real time on the inspection site, which brings great inconvenience to subsequent repair and confirmation work. Therefore, this invention proposes a pipeline internal corrosion detection device for pressure pipelines to improve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a device for detecting corrosion inside pressure pipelines in order to solve the problems mentioned above in the background art.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: A device for detecting internal corrosion of pressure pipelines, comprising: The testing platform is equipped with a rotating support mechanism for supporting and driving the pipe under test to rotate around its own axis. The testing platform is also equipped with an installation platform that can move axially along the inside of the pipe under test. An electromagnetic ultrasonic probe is installed on the installation platform. The rotational movement of the rotating support mechanism and the axial movement of the installation platform cooperate to make the electromagnetic ultrasonic probe form a spiral scanning path relative to the inner wall of the pipe. The defect marking mechanism includes an electric push rod mounted on a mounting platform. The piston end of the electric push rod is connected to a storage ring shell surrounding an electromagnetic ultrasonic probe. The storage ring shell is connected to several ring-shaped receiving shells via branch pipes. A material passage groove is formed through the inner bottom wall of the receiving shell. A sealing ball is movably inserted in the material passage groove. A first spring connects the sealing ball to the receiving shell.

[0006] Furthermore, the branch pipe is a flexible hose, and a guide rod with its end movable through the storage ring shell is fixed on the receiving shell. A second spring sleeved on the guide rod is installed between the storage ring shell and the receiving shell.

[0007] Furthermore, a connecting ring is fitted onto the sealing ball, and a connecting frame is provided on the connecting ring. The end of the first spring away from the receiving shell is connected to the connecting frame.

[0008] Furthermore, the inner wall of the receiving shell has two limiting grooves, and the two ends of the connecting frame are slidably inserted into the two limiting grooves respectively.

[0009] Furthermore, the rotating support mechanism includes a mounting frame fixed on the testing table, through which two main support rods and one auxiliary support rod rotate. The two main support rods and the auxiliary support rod are arranged in a triangle. Two transmission belts are driven on the two main support rods and the auxiliary support rod. One end of one of the main support rods is connected to a first motor mounted on the mounting frame.

[0010] Furthermore, the mounting bracket has two through slots, the inner wall of the through slots is fixed with a sliding rod, a connecting block is slidably sleeved on the sliding rod, and a third spring sleeved on the sliding rod is installed between the connecting block and the inner wall of the through slot. The auxiliary support rod rotates through the two connecting blocks.

[0011] Furthermore, the mounting frame has two rotating shafts that rotatably pass through it, and two arc-shaped rods are fixed on the rotating shafts. Pressure rollers are rotatably provided at the ends of the arc-shaped rods, and the mounting frame is provided with a drive unit for driving the two rotating shafts to rotate synchronously in opposite directions.

[0012] Furthermore, the drive unit includes a bidirectional lead screw that rotates through the mounting frame. One end of the bidirectional lead screw is connected to a second motor mounted on the mounting frame. Both ends of the bidirectional lead screw are threaded with movable blocks. Gears are fixed on both of the two rotating shafts. Racks are fixed on both of the two movable blocks, and the two racks mesh with the teeth of the two gears respectively.

[0013] Furthermore, the testing platform has a cavity, and a screw is rotatably passed through the inner wall of the cavity on opposite sides. One end of the screw is connected to a third motor mounted on the testing platform, and a U-shaped frame is threaded onto the screw. A mounting platform is located at the end of the U-shaped frame.

[0014] Furthermore, two vertical rods slide through the end of the U-shaped frame, and the mounting platform is fixed at the bottom of the two vertical rods. A fourth spring is installed between the U-shaped frame and the mounting platform and sleeved on the vertical rods. A support column is fixed at the bottom of the mounting platform, and a ball bearing is tumbled into the end of the support column.

[0015] The beneficial effects of this invention are as follows: 1. In this invention, an external-driven internal inspection mode is adopted. The external rotating support mechanism drives the pipe to rotate, and in conjunction with the axial movement of the internal mounting platform, the electromagnetic ultrasonic probe can form a continuous spiral scanning path relative to the inner wall of the pipe. This structure avoids the complex movement of the driven probe inside the pipe, making the control more stable and ensuring full coverage inspection of the inner wall of the pipe without omissions. When the electromagnetic ultrasonic probe detects a defect, the scanning can be paused immediately and the defect marking mechanism can be triggered to form a ring mark on the inner wall surface of the defect. This achieves in-situ, visual positioning of the defect, providing precise guidance for subsequent re-inspection or repair, thereby improving practicality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a three-dimensional structural diagram of the rotating support structure of the present invention; Figure 4 This is a three-dimensional sectional view of the rotating support structure of the present invention; Figure 5 This is a three-dimensional structural diagram of the defect marking structure of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the defect marking structure of the present invention; Figure 7 This is the present invention. Figure 3 Enlarged view of point A in the middle; Figure 8 This is the present invention. Figure 6 Enlarged view of section B in the middle.

[0017] Reference numerals: 1. Inspection table; 2. Rotating support mechanism; 3. Mounting platform; 4. Electromagnetic ultrasonic probe; 5. Defect marking mechanism; 6. Rotating shaft; 7. Arc-shaped rod; 8. Pressure roller; 9. Drive unit; 10. Cavity; 11. Screw; 12. Third motor; 13. U-shaped frame; 14. Vertical rod; 15. Fourth spring; 16. Support column; 17. Ball bearing; 201. Mounting frame; 202. Main support rod; 203. Secondary support rod; 204. Conveyor belt; 205. First motor; 206. Through 501. Groove; 207. Slide rod; 208. Connecting block; 209. Third spring; 501. Electric push rod; 502. Storage ring shell; 503. Receiving shell; 504. Material passage groove; 505. Sealing ball; 506. First spring; 507. Guide rod; 508. Second spring; 509. Connecting ring; 5010. Connecting frame; 5011. Limiting groove; 5012. Branch pipe; 901. Two-way lead screw; 902. Second motor; 903. Movable block; 904. Gear; 905. Rack. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0019] like Figures 1-8 As shown, in some embodiments of the present invention, a pipe corrosion detection device for pressure pipelines includes: The testing platform 1 is equipped with a rotating support mechanism 2 for supporting and driving the pipe under test to rotate around its own axis. The testing platform 1 also has a mounting platform 3 that can move axially within the pipe. An electromagnetic ultrasonic probe 4 is mounted on the mounting platform 3. The rotational movement of the rotating support mechanism 2 and the axial movement of the mounting platform 3 coordinate to create a helical scanning path for the electromagnetic ultrasonic probe 4 relative to the inner wall of the pipe. When performing corrosion detection on the inner wall of the pipe, the pipe is placed on the rotating support mechanism 2. The rotating support mechanism 2 not only supports the pipe but also drives it to rotate around its axis. Simultaneously, the mounting platform 3 moves axially within the pipe, and the electromagnetic ultrasonic probe 4 scans the inner wall of the pipe... The wall is inspected (it directly excites ultrasonic waves in the workpiece through electromagnetic effect, without the need for coupling agent, and does not contact the inner wall of the pipe, thus achieving non-contact detection). The rotating support mechanism 2 rotates the pipe at a uniform speed, which constitutes the circumferential motion required for scanning. The mounting table 3 makes a controllable linear feed in a direction parallel to the pipe axis, which constitutes the axial motion required for scanning. The circumferential motion combined with the axial motion can form a continuous spiral scanning path relative to the inner wall of the pipe. Compared with the complex movement of the driven probe in the pipe, this method simplifies the structure, makes the control more stable and reliable, and can effectively cover the entire area of ​​the inner wall of the pipe, avoiding the occurrence of missed detection. The defect marking mechanism 5 includes an electric push rod 501 mounted on the mounting platform 3. The piston end of the electric push rod 501 is connected to a storage ring shell 502 surrounding the electromagnetic ultrasonic probe 4. Preferably, the storage ring shell 502 surrounds the probe rod of the electromagnetic ultrasonic probe 4 and is used to store color marking slurry. Several ring-shaped receiving shells 503 are connected to the storage ring shell 502 through a branch pipe 5012. The slurry can flow into the receiving shells 503 through the branch pipe 5012. A material passage trough 504 is formed through the inner bottom wall of the receiving shell 503. A sealing device is movably inserted in the material passage trough 504. A first spring 506 connects the blocking ball 505 to the receiving shell 503. Preferably, the material passage 504 is constructed as an arc-shaped groove. The blocking ball 505 blocks the material passage 504 under the elastic force of the first spring 506, and a portion of the blocking ball 505 protrudes from the receiving shell 503. In actual use, the testing table 1 is equipped with a PLC controller, which controls the operation of the rotating support mechanism 2 and the mounting table 3, and is wired to the electric push rod 501 and the electromagnetic ultrasonic probe 4. When the electromagnetic ultrasonic probe 4 detects a defect, the PLC controller controls the rotating support mechanism... 2 and the installation platform 3 are suspended, and the electric push rod 501 is controlled to operate. The piston end of the electric push rod 501 pushes the storage ring shell 502 downward, and the receiving shell 503 approaches the inner wall of the pipe. The sealing ball 505 is blocked after contacting the pipe wall, while the storage ring shell 502 continues to be pressed down under the action of the push rod. This relative movement causes the sealing ball 505 in each receiving shell 503 to overcome the force of the first spring 506 and move upward, thereby opening the material passage trough 504. The slurry in the receiving shell 503 is released under pressure and adheres to the inner wall of the pipe. Since several receiving shells 503 are distributed in a ring, Furthermore, surrounding the electromagnetic ultrasonic probe 4, the slurry is released at multiple points and adheres to the inner wall of the pipe, forming a ring-shaped marking circle. The marking circle corresponds exactly to the defect location, forming an intuitive physical mark, which provides accurate guidance for subsequent re-inspection or repair, thereby improving practicality. After marking is completed, the piston end of the electric push rod 501 retracts, driving the storage ring shell 502 to move upward. The elastic force of the first spring 506 forces the sealing ball 505 to seal the material passage 504 again. Then, the PLC controller controls the rotating support mechanism 2 and the mounting platform 3 to run again, thereby inspecting other areas. In this scheme, an external drive and internal inspection mode is adopted. The external rotating support mechanism 2 drives the pipe to rotate, and in conjunction with the axial movement of the internal mounting platform 3, the electromagnetic ultrasonic probe 4 can form a continuous spiral scanning path relative to the inner wall of the pipe. This structure avoids the complex movement of the driven probe inside the pipe, making the control more stable and ensuring full coverage inspection of the inner wall of the pipe without omissions. When the electromagnetic ultrasonic probe 4 detects a defect, the scanning can be paused immediately and the defect marking mechanism 5 can be triggered to form a ring mark on the inner wall surface of the defect. This design realizes in-situ, visual positioning of the defect, providing accurate guidance for subsequent re-inspection or repair, thereby improving practicality.

[0020] like Figure 5 and Figure 6 As shown, a further technical solution for the defect marking mechanism 5 of the present invention is disclosed. The branch pipe 5012 is a flexible hose, and a guide rod 507 with its end movable through the storage ring shell 502 is fixed on the receiving shell 503. A second spring 508 is installed between the storage ring shell 502 and the receiving shell 503 and sleeved on the guide rod 507. Since the inner wall of the pipe is curved, by setting the guide rod 507 and the second spring 508, when the defect marking mechanism 5 is operating, under the influence of the resistance force, each receiving shell 503 is allowed to independently adapt to the unevenness of the inner wall of the pipe, ensuring that each discharge point can effectively contact the pipe wall, and ensuring that a marking ring can be marked on the curved inner wall of the pipe, thereby improving practicality.

[0021] like Figure 8 As shown, a further technical solution for the defect marking mechanism 5 of the present invention is disclosed. A connecting ring 509 is sleeved on the sealing ball 505, and a connecting frame 5010 is provided on the connecting ring 509. The end of the first spring 506 away from the receiving shell 503 is connected to the connecting frame 5010. Preferably, in order to make the solution more reasonable, the inner wall of the connecting ring 509 is curved, forming an arc-shaped annular groove. The sealing ball 505 is rolled and inserted into the arc-shaped annular groove. The inner diameter of the groove opening at the upper and lower ends of the arc-shaped annular groove is smaller than the diameter of the sealing ball 505, so that the sealing ball 505 can roll within the connecting ring. The ball rolls freely within the connecting ring 509, but cannot completely detach from it. Since both the rotating support mechanism 2 and the mounting platform 3 operate slowly and uniformly, during the scanning process, when a defect is detected, the rotating support mechanism 2 and the mounting platform 3 do not need to stop operating. The electric push rod 501 can run quickly, which drives the storage ring shell 502 to move up and down rapidly once, causing the sealing ball 505 to roll into contact with the inner wall of the pipe. This ensures that the operation of the rotating support mechanism 2 and the mounting platform 3 does not interfere with the operation of the defect marking mechanism 5, thereby improving practicality.

[0022] like Figure 8As shown, a further technical solution for the defect marking mechanism 5 of the present invention is disclosed. Two limiting grooves 5011 are opened on the inner wall of the receiving shell 503. The two ends of the connecting frame 5010 are respectively slidably inserted into the two limiting grooves 5011. By opening the limiting grooves 5011 on the inner wall of the receiving shell 503 and slidably inserting the connecting frame 5010 into the limiting grooves 5011, it can not only play a guiding role to ensure that the sealing ball 505 moves accurately vertically, thereby ensuring effective sealing of the material passage 504, but also play a limiting role to ensure that when the electric push rod 501 drives the storage ring shell 502 to move down, the sealing ball 505 effectively abuts against the inner wall of the pipe and moves up through the counteracting force to ensure effective opening of the material passage 504. At the same time, it can also limit its maximum opening degree to ensure that the sealing ball 505 is not completely retracted into the receiving shell 503 during the opening process, avoiding contact friction between the receiving shell 503 and the inner wall of the pipe.

[0023] like Figure 3 and Figure 4 The specific structure of the rotating support mechanism 2 of the present invention is disclosed. The rotating support mechanism 2 includes a mounting frame 201 fixed on the testing table 1. Two main support rods 202 and one auxiliary support rod 203 rotate through the mounting frame 201. The two main support rods 202 and the auxiliary support rod 203 are triangularly distributed. Two transmission belts 204 are drivenly sleeved on the two main support rods 202 and the auxiliary support rod 203. One end of one of the main support rods 202 is connected to a first motor 205 mounted on the mounting frame 201. When placing the pipe, the pipe is... Placed on two conveyor belts 204, the upper surface of the conveyor belts 204 is pressed down by the weight of the pipeline, causing the conveyor belts 204 to partially arc-shaped and cover the lower surface of the pipeline, increasing their contact area with the pipeline. The two main support rods 202 provide indirect support for the pipeline. The first motor 205 performs work, and its output shaft drives the two main support rods 202 and the auxiliary support rod 203 to rotate, thereby driving the two conveyor belts 204 to transmit power. This not only provides horizontal support for the pipeline but also drives the pipeline to rotate, facilitating the inspection of the inner wall of the pipeline.

[0024] like Figure 7As shown, a further technical solution for the rotating support mechanism 2 of the present invention is disclosed. Two through slots 206 are formed through the mounting frame 201. A sliding rod 207 is fixed on the inner wall of the through slot 206. A connecting block 208 is slidably sleeved on the sliding rod 207. A third spring 209 sleeved on the sliding rod 207 is installed between the connecting block 208 and the inner wall of the through slot 206. The auxiliary support rod 203 rotates through the two connecting blocks 208. In the initial state, the elastic force of the third spring 209 is used to force the connecting block 208 to move downward, thereby pulling the conveyor belt 204. In the initial state, the conveyor belt 204 is triangular. When the pipe is placed, the conveyor belt 204 is pressed down under the action of the pipe's gravity. This ensures that the conveyor belt 204 covers the lower surface of the pipe in an arc shape and keeps the conveyor belt 204 taut. This ensures that the conveyor belt 204 can drive the pipe to rotate stably during transmission, thereby ensuring effective detection of the inner wall of the pipe.

[0025] like Figure 3 As shown, a further technical solution for the rotary support mechanism 2 of the present invention is disclosed. Two rotating shafts 6 are rotatably connected on the mounting frame 201. Two arc-shaped rods 7 are fixed on the rotating shafts 6. Preferably, the two arc-shaped rods 7 correspond to the two conveyor belts 204 respectively. Pressure rollers 8 are rotatably provided at the ends of the arc-shaped rods 7. The mounting frame 201 is provided with a driving part 9 for driving the two rotating shafts 6 to rotate synchronously in opposite directions. After the pipe is placed, the driving part 9 drives the two rotating shafts 6 to rotate synchronously in opposite directions, thereby driving the arc-shaped rods 7 to rotate around the rotating shafts 6 as the center. This causes the pressure rollers 8 to roll and press against the upper surface of the pipe. By pressing the upper surface of the pipe with the pressure rollers 8, the elastic force of the third spring 209 forces the conveyor belts 204 to cover the lower surface of the pipe, always providing effective support force for the pipe so that the pipe and the conveyor belts 204 are in close contact, ensuring that the drive does not slip and that the pipe can rotate stably, thereby ensuring the accuracy of the spiral scanning path.

[0026] like Figure 4 As shown, the specific structure of the drive unit 9 of the present invention is disclosed. The drive unit 9 includes a bidirectional lead screw 901 that rotates through the mounting frame 201. One end of the bidirectional lead screw 901 is connected to a second motor 902 mounted on the mounting frame 201. Both ends of the bidirectional lead screw 901 are threaded with movable blocks 903. Gears 904 are fixed on both rotating shafts 6. Racks 905 are fixed on both movable blocks 903, and the two racks 905 mesh with the teeth of the two gears 904 respectively. When the second motor 902 does work, its output shaft drives the bidirectional lead screw 901 to rotate. Under the action of the bidirectional thread, the two movable blocks 903 move synchronously in opposite directions, thereby driving the two racks 905 to move synchronously in opposite directions. By utilizing the meshing of the teeth of the racks 905 and the gears 904, the two rotating shafts 6 are driven to rotate synchronously in opposite directions.

[0027] like Figure 2 As shown, a further technical solution for the movement of the mounting platform 3 is disclosed in this invention. The testing platform 1 has a cavity 10 inside. A screw 11 is rotatably passed through the inner wall of the cavity 10 on opposite sides. One end of the screw 11 is connected to a third motor 12 mounted on the testing platform 1. A U-shaped frame 13 is threaded onto the screw 11. The mounting platform 3 is located at the end of the U-shaped frame 13. Preferably, a through groove communicating with the cavity 10 is opened on one side of the testing platform 1. The lower horizontal end of the U-shaped frame 13 movably passes through the through groove. The mounting platform 3 is located at the end of the upper horizontal section of the U-shaped frame 13. When the third motor 12 does work, its output shaft drives the screw 11 to rotate. Under the transmission of the screw, the U-shaped frame 13 moves horizontally, thereby driving the mounting platform 3 to move axially along the pipeline.

[0028] like Figure 2 and Figure 6 As shown, a further technical solution for the movement of the mounting platform 3 is disclosed in this invention. Two vertical rods 14 slide through the end of the U-shaped frame 13. The mounting platform 3 is fixed to the bottom end of the two vertical rods 14. A fourth spring 15 is installed between the U-shaped frame 13 and the mounting platform 3, sleeved on the vertical rods 14. A support column 16 is fixed to the bottom end of the mounting platform 3, and a ball bearing 17 is rotatably inserted into the end of the support column 16. By passing the vertical rods 14 through the U-shaped frame 13, the mounting platform 3 is positioned at the end of the vertical rods 14, allowing the mounting platform 3 to have vertical floating capability along the U-shaped frame 13. To make the solution more reasonable, electromagnetic ultrasonic testing... The height of the probe end of head 4 is higher than the height of ball bearing 17. Under the action of gravity, in conjunction with the elastic force of the fourth spring 15, ball bearing 17 effectively rolls and overlaps with the inner wall of the pipe. This ensures that pipes of different diameters can be inspected. At the same time, during inspection, the probe end of electromagnetic ultrasonic probe 4 maintains a suitable gap with the inner wall of the pipe, keeping the inspection distance constant. Furthermore, the ball bearing 17 at the end of the support column 16 rolls on the inner wall of the pipe, providing a stable bottom auxiliary support point for the entire advancing mounting platform 3, preventing it from sagging or vibrating due to excessive cantilever length, ensuring the alignment of the probe in the pipe axis direction, and ensuring the inspection results.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for detecting internal corrosion of pressure pipelines, characterized in that, include: The testing platform (1) is provided with a rotating support mechanism (2) for supporting and driving the pipe to be tested to rotate around its own axis. The testing platform (1) is provided with an installation platform (3) that can move axially along the inside of the pipe to be tested. An electromagnetic ultrasonic probe (4) is provided on the installation platform (3). The rotational movement of the rotating support mechanism (2) is coordinated with the axial movement of the installation platform (3) so that the electromagnetic ultrasonic probe (4) forms a spiral scanning path relative to the inner wall of the pipe. The defect marking mechanism (5) includes an electric push rod (501) mounted on a mounting platform (3). The piston end of the electric push rod (501) is connected to a storage ring shell (502) surrounding the electromagnetic ultrasonic probe (4). The storage ring shell (502) is connected to several ring-shaped receiving shells (503) through a branch pipe (5012). The inner bottom wall of the receiving shell (503) is provided with a material passage groove (504). A sealing ball (505) is movably inserted in the material passage groove (504). A first spring (506) is connected between the sealing ball (505) and the receiving shell (503).

2. The pipeline corrosion detection device for pressure pipelines according to claim 1, characterized in that, The branch pipe (5012) is a flexible hose, and a guide rod (507) with its end movable through the storage ring shell (502) is fixed on the receiving shell (503). A second spring (508) sleeved on the guide rod (507) is installed between the storage ring shell (502) and the receiving shell (503).

3. The pipeline corrosion detection device for pressure pipelines according to claim 1, characterized in that, The sealing ball (505) is fitted with a connecting ring (509), and a connecting frame (5010) is provided on the connecting ring (509). The end of the first spring (506) away from the receiving shell (503) is connected to the connecting frame (5010).

4. The pipeline corrosion detection device for pressure pipelines according to claim 3, characterized in that, The inner wall of the housing (503) has two limiting grooves (5011), and the two ends of the connecting frame (5010) are respectively slidably inserted into the two limiting grooves (5011).

5. The pipeline corrosion detection device for pressure pipelines according to claim 1, characterized in that, The rotating support mechanism (2) includes a mounting frame (201) fixed on the testing table (1). Two main support rods (202) and one auxiliary support rod (203) rotate through the mounting frame (201). The two main support rods (202) and the auxiliary support rod (203) are arranged in a triangular pattern. Two transmission belts (204) are driven on the two main support rods (202) and the auxiliary support rod (203). The end of one of the main support rods (202) is connected to a first motor (205) mounted on the mounting frame (201).

6. The pipeline corrosion detection device for pressure pipelines according to claim 5, characterized in that, The mounting bracket (201) has two through slots (206) through it. A sliding rod (207) is fixed on the inner wall of the through slot (206). A connecting block (208) is slidably sleeved on the sliding rod (207). A third spring (209) sleeved on the sliding rod (207) is installed between the connecting block (208) and the inner wall of the through slot (206). The auxiliary support rod (203) rotates through the two connecting blocks (208).

7. The pipeline corrosion detection device for pressure pipelines according to claim 5, characterized in that, The mounting bracket (201) has two rotating shafts (6) that rotate through it. Two arc-shaped rods (7) are fixed on the rotating shafts (6). Pressure rollers (8) are rotatably provided at the ends of the arc-shaped rods (7). The mounting bracket (201) is provided with a drive unit (9) for driving the two rotating shafts (6) to rotate synchronously in opposite directions.

8. The pipe corrosion detection device for pressure pipelines according to claim 7, characterized in that, The drive unit (9) includes a bidirectional lead screw (901) that rotates through the mounting frame (201). One end of the bidirectional lead screw (901) is connected to a second motor (902) mounted on the mounting frame (201). Both ends of the bidirectional lead screw (901) are threaded with movable blocks (903). Gears (904) are fixed on both of the two rotating shafts (6). Racks (905) are fixed on both of the two movable blocks (903), and the two racks (905) mesh with the teeth of the two gears (904) respectively.

9. The pipe corrosion detection device for pressure pipelines according to claim 1, characterized in that, The testing platform (1) has a cavity (10) inside. A screw (11) is rotatably passed through the inner wall of the cavity (10) on opposite sides. One end of the screw (11) is connected to a third motor (12) installed on the testing platform (1). A U-shaped frame (13) is threaded on the screw (11), and a mounting platform (3) is installed at the end of the U-shaped frame (13).

10. The pipe corrosion detection device for pressure pipelines according to claim 9, characterized in that, The end of the U-shaped frame (13) has two vertical rods (14) that slide through it. The mounting platform (3) is fixed at the bottom of the two vertical rods (14). A fourth spring (15) is installed between the U-shaped frame (13) and the mounting platform (3) and is sleeved on the vertical rods (14). A support column (16) is fixed at the bottom of the mounting platform (3). A ball bearing (17) is rolled into the end of the support column (16).

Images