A petrochemical pipeline corrosion defect detection device and method

Abstract

The present invention provides a device and method for detecting corrosion defects in a petrochemical pipeline, and relates to the field of pipeline defect detection. The detection device includes a mounting plate, and also includes: a battery box, which is mounted on one side of the mounting plate, and an extension structure includes a transmission assembly arranged on one side of the mounting plate, a rotating frame rotatably connected to the outside of the transmission assembly, and a push arm rotatably connected to the outside of the transmission assembly and rotatably connected to the rotating frame, and a connecting wire connected to a controller is installed on one side of the electromagnetic ultrasonic thickness probe; the present invention drives the screw rod to rotate through a servo motor, so that the mobile frame drives the rotating frame to flip, and at the same time, the auxiliary wheel and the mobile wheel are tightly attached to the inside of the pipeline, realizing the size adjustment function, so that the device can easily adapt to pipelines with different inner diameters, so as to cope with various complex working conditions, enhance the versatility and flexibility of the detection device, and solve the problem that the pipeline corrosion detection device in the prior art is not easy to adjust the size.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline defect detection, and in particular to a device and method for detecting corrosion defects in petrochemical pipelines. Background Art

[0002] Petrochemical pipelines are an indispensable and important part of chemical production. They are mainly used to transport oil, natural gas, chemical raw materials, intermediates, synthetics and finished products. Since petrochemical raw materials usually contain corrosive substances, the inner wall of the petrochemical pipeline is easily corroded and damaged during the transportation process. Therefore, a petrochemical pipeline corrosion defect detection device is set up to perform corrosion defect detection on the petrochemical pipeline, so as to promptly discover the safety hazards such as corrosion, cracks, and peeling in the petrochemical pipeline, thereby avoiding these hazards from developing into serious accidents.

[0003] After searching, the Chinese patent application number 202222222740.2 discloses a pipeline corrosion detection device, including a detection box, a locator and a magnetic induction detector, the locator is installed on the front side of the detection box, the magnetic induction detector is installed on the front side of the locator, and also includes: a base, the base is concave, and the detection box is placed on the base; track wheels, four track wheels are rotatably installed on the front and rear ends of the left and right sides of the base; tracks, the track meshes and sleeves on the outer walls of the two track wheels on the same side; motors, the motors are installed on the inner wall of the base, the number of the motors is two, and the two motors are respectively installed on the left front end and the right rear end of the inner wall of the base. The pipeline corrosion detection device can realize the disassembly between the detection box and the base, is simple to operate, and is flexible to use. The equipment needed in other pipelines can be installed on the base, and the support mechanism is used to achieve the effect of stable movement, so that the support mechanism is fully utilized, resources are saved, and the scope of application is wide, which meets the use needs of enterprises;

[0004] The above patent still has the following shortcomings: it is not convenient to adjust the size to adapt to the defects of pipes with different inner diameters. The traditional pipeline corrosion detection device adopts a fixed structure, and its size and shape are determined after manufacturing. It cannot be adjusted according to the actual inner diameter of the pipeline. This design makes the detection device only suitable for pipes of specific sizes, limiting its scope of application. Summary of the invention

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a petrochemical pipeline corrosion defect detection device and method to solve the problem in the prior art that it is inconvenient to adjust the size to adapt to pipelines with different inner diameters.

[0006] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a petrochemical pipeline corrosion defect detection device, comprising a mounting plate, and further comprising:

[0007] A battery box is mounted on one side of the mounting plate, and a controller is fixed on one side of the battery box, a control board is mounted on the top of one side of the controller, and a data interface is mounted on the bottom of one side of the controller;

[0008] An extension structure is arranged on the other side of the mounting plate, wherein the extension structure comprises a transmission assembly arranged on one side of the mounting plate, a rotating frame rotatably connected to the outside of the transmission assembly, and a push arm rotatably connected to the outside of the transmission assembly and rotatably connected to the rotating frame;

[0009] The pressure storage structure is arranged inside the extension structure to make the device move smoothly and not easy to shake or slip;

[0010] A moving wheel is rotatably connected to the interior of the rotating frame, and a driving motor connected to the rotating frame is installed at the rotating end of the moving wheel;

[0011] An auxiliary wheel is rotatably connected to the inside of the rotating frame on a side away from the moving wheel;

[0012] A fitting structure is arranged on the outer side of the rotating frame;

[0013] An electromagnetic ultrasonic thickness measuring probe is installed inside the bonding structure, and a connecting wire connected to the controller is installed on one side of the electromagnetic ultrasonic thickness measuring probe;

[0014] The transmission assembly includes a connecting plate fixed to one side of the mounting plate, a fixing rod fixed to one side of the connecting plate, a screw rod rotatably connected to the inside of the connecting plate, a limit plate rotatably connected to the outside of the screw rod and connected to the fixing rod, a differential fixed to one side of the fixing rod and having a rotating end connected to the screw rod, a servo motor connected to the rotating end of the differential, and a moving frame sliding on the outside of the fixing rod and rotatably connected to the push arm;

[0015] The fitting structure includes a rotating seat installed on one side of the rotating frame, a connecting frame rotatably connected to both sides of the rotating seat, a fixing frame fixed to the top of one side of the connecting frame, guide wheels rotatably connected to both sides of the top of the fixing frame, an electric telescopic rod fixed inside the fixing frame and having a telescopic end connected to an electromagnetic ultrasonic thickness measuring probe, a guardrail fixed to one side of the top of the fixing frame, and a wire through hole opened on one side of the inside of the fixing frame.

[0016] Furthermore, the rotating frame and the limit plate are rotatably connected, the connecting plate and the fixed rod are welded into an integrated structure, the limit plate and the fixed rod are welded into an integrated structure, the outer wall of the screw rod is provided with an external thread, and the interior of the movable frame is provided with an internal thread that cooperates with the external thread, the rotating frame is connected to the movable frame through a push arm, and the push arms are distributed in a circular shape with equal intervals on the outside of the movable frame.

[0017] Furthermore, roller bearings are installed between the limit plate and the screw rod, and between the connecting plate and the screw rod, respectively, and the screw rod forms a rotating structure through the roller bearings and the connecting plate.

[0018] Furthermore, the pressure storage structure includes an oil storage cylinder fixed at the middle section of the push arm, an oil outlet hole opened inside one side of the oil storage cylinder, a connecting hose connected to one side of the oil outlet hole, a spring seat fixed on the outside of the oil storage cylinder, a telescopic spring installed on the top of the spring seat, a connecting seat fixed at the top of the telescopic spring and connected to the push arm, a piston rod fixed at the bottom end of the connecting seat and slidably arranged inside the oil storage cylinder, and a sealing piston installed at the bottom end of the piston rod and slidably arranged inside the oil storage cylinder.

[0019] Furthermore, the oil storage cylinders are symmetrically distributed on the vertical center line of the screw rod, and the two groups of symmetrically arranged oil storage cylinders are connected through a connecting hose.

[0020] Furthermore, the connecting frame forms a rotating structure through the rotating seat and the rotating frame, and the guide wheels are symmetrically distributed on the vertical center line of the rotating seat.

[0021] Furthermore, the fixing frame and the guardrail are welded into an integrated structure, and the top-view cross-section of the guardrail is a "V"-shaped inclined structure.

[0022] In a second aspect, the present invention provides a method for detecting corrosion defects in a petrochemical pipeline, comprising the following steps:

[0023] S1: Open the pipeline and empty the contents inside the pipeline, then place the device into the pipeline, and use the battery box to provide power for the device to operate;

[0024] S2: Use the stretching structure to stretch and push the moving wheels and auxiliary wheels to move, so that the four sets of moving wheels and auxiliary wheels are in contact with the inner wall of the pipe. At the same time, the fitting structure drives the electromagnetic ultrasonic thickness measuring probe to move toward the inner wall of the pipe;

[0025] S3: Start the driving motor to drive the moving wheel to rotate, drive the device to move inside the pipeline, and at the same time, the electromagnetic ultrasonic thickness probe detects the inner wall of the pipeline, and transmits the detection data to the controller through the connecting wire, so that the controller analyzes and stores the pipeline data for the convenience of staff to view;

[0026] S4: When the device moves to the pipe connection, the length of the push arm is adjusted by the expansion and contraction deformation of the pressure storage structure to reduce the shock of the movement of the device. At the same time, the pressure storage structure uses elastic force to keep the moving wheel and the auxiliary wheel close to the inner wall of the pipe, thereby increasing the friction between the moving wheel and the inner wall of the pipe.

[0027] S5: After the detection is completed, the drive motor is started to rotate in the reverse direction, so that the moving wheel drives the device to return to the original path and leave the inside of the pipeline. The data stored in the controller can be viewed and read through the control panel and the data interface.

[0028] Compared with the prior art, the device and method for detecting corrosion defects in petrochemical pipelines provided by the present invention have the following beneficial effects:

[0029] 1. The petrochemical pipeline corrosion defect detection device drives the screw to rotate through the servo motor, so that the mobile frame drives the rotating frame to flip, and the auxiliary wheel and the mobile wheel are closely attached to the inside of the pipeline, realizing the size adjustment function, so that the device can easily adapt to pipelines with different inner diameters, so as to cope with various complex working conditions, enhance the versatility and flexibility of the detection device, and solve the problem that the pipeline corrosion detection device in the prior art is not easy to adjust the size;

[0030] 2. The petrochemical pipeline corrosion defect detection device drives the connecting frame to move through the rotating frame to adjust the position of the electromagnetic ultrasonic thickness measuring probe, thereby realizing position adjustment. When the device adjusts the size, the position of the electromagnetic ultrasonic thickness measuring probe is moved to ensure that the device can detect the corrosion condition of the pipeline more accurately.

[0031] 3. The petrochemical pipeline corrosion defect detection device pushes the moving wheel and the auxiliary wheel to extend through the extension structure, so that the connecting seat squeezes the hydraulic oil and the telescopic spring to store pressure, and adjusts the pressure of the rotating frame on the moving wheel and the auxiliary wheel to prevent slipping during the movement. At the same time, the telescopic spring and the oil inside the oil storage cylinder reduce the impact of vibration on the device, and realize the function of pressure accumulation and buffering, ensuring that the moving wheel of the device is close to the inner wall of the pipeline during the movement, ensuring the normal movement of the device, and reducing the vibration caused by the movement;

[0032] 4. The petrochemical pipeline corrosion defect detection device adjusts the lifting gap of the electromagnetic ultrasonic thickness measuring probe through an electric telescopic rod, thereby realizing gap adjustment, which is convenient for adjusting the height of the lifting gap according to factors such as the roughness of the inner wall of the pipeline and the thickness of the coating, so that the ultrasonic wave can be more effectively transmitted and reflected in the material, ensuring the accuracy and reliability of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is one of the structural schematic diagrams of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0034] Figure 2 This is a second structural schematic diagram of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0035] Figure 3 This is a schematic diagram of the controller structure of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0036] Figure 4 A three-dimensional schematic diagram of the extended structure of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0037] Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a stretched structure of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0038] Figure 6 A schematic diagram of the three-dimensional cross-sectional structure of a transmission component of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0039] Figure 7 A schematic diagram of the three-dimensional structure of a rotating frame of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0040] Figure 8 A schematic diagram of a three-dimensional cross-sectional structure of a fitting structure of a petrochemical pipeline corrosion defect detection device proposed by the present invention;

[0041] Fig. 9 This is a schematic diagram of the three-dimensional cross-sectional structure of a pressure storage structure of a petrochemical pipeline corrosion defect detection device proposed by the present invention.

[0042] Description of reference numerals:

[0043] 1. Mounting plate; 2. Extension structure; 201. Rotating frame; 202. Push arm; 203. Servo motor; 204. Differential; 205. Fixed rod; 206. Connecting plate; 207. Roller bearing; 208. Screw rod; 209. Moving frame; 210. Limiting plate; 3. Auxiliary wheel; 4. Driving motor; 5. Moving wheel; 6. Fitting structure; 601. Connecting frame; 602. Fixed frame; 603. Guide wheel; 604. Guardrail; 60 5. Wire hole; 606. Electric telescopic rod; 607. Rotating seat; 7. Electromagnetic ultrasonic thickness probe; 8. Connecting wire; 9. Controller; 10. Battery box; 11. Data interface; 12. Control board; 13. Pressure storage structure; 1301. Connecting hose; 1302. Oil storage cylinder; 1303. Spring seat; 1304. Sealing piston; 1305. Telescopic spring; 1306. Connecting seat; 1307. Piston rod; 1308. Oil outlet hole. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0045] like Figures 1 to 9 As shown, the embodiment of the present invention provides a petrochemical pipeline corrosion defect detection device, including a mounting plate 1, and also including:

[0046] A battery box 10 is mounted on one side of the mounting plate 1, and a controller 9 is fixed on one side of the battery box 10, a control board 12 is mounted on the top of one side of the controller 9, and a data interface 11 is mounted on the bottom of one side of the controller 9;

[0047] The extension structure 2 is arranged on the other side of the mounting plate 1, wherein the extension structure 2 includes a transmission assembly arranged on one side of the mounting plate 1, a rotating frame 201 rotatably connected to the outside of the transmission assembly, and a push arm 202 rotatably connected to the outside of the transmission assembly and rotatably connected to the rotating frame 201;

[0048] The pressure storage structure 13 is arranged inside the extension structure 2, and is used to make the device move smoothly without shaking or slipping;

[0049] A moving wheel 5 is rotatably connected to the inside of the rotating frame 201, and a driving motor 4 connected to the rotating frame 201 is installed at the rotating end of the moving wheel 5;

[0050] The auxiliary wheel 3 is rotatably connected to the inner part of the rotating frame 201 away from the moving wheel 5;

[0051] The fitting structure 6 is arranged on the outer side of the rotating frame 201;

[0052] The electromagnetic ultrasonic thickness measuring probe 7 is installed inside the bonding structure 6 , and a connecting wire 8 connected to the controller 9 is installed on one side of the electromagnetic ultrasonic thickness measuring probe 7 .

[0053] The working principle and beneficial effects of the above technical solution are as follows: open the pipeline, remove the existing materials in the pipeline, send the device into the pipeline, use the battery box 10 to provide power support for the device, activate the device operation, operate the extension structure 2 to perform the extension action, push the moving wheel 5 and the auxiliary wheel 3 to move toward the inner wall of the pipeline, ensure that the four sets of moving wheels 5 and the auxiliary wheels 3 are completely in contact with the inner wall, and at the same time, the contact structure 6 drives the electromagnetic ultrasonic thickness measuring probe 7 assembly to move toward the inner wall of the pipeline for comprehensive inspection, start the drive motor 4 to drive the moving wheel 5 to start rotating, thereby driving the entire device to move smoothly in the pipeline. During this process, the electromagnetic ultrasonic thickness measuring probe 7 is responsible for detecting the condition of the inner wall of the pipeline and transmitting the collected data through the pipeline. The data is transmitted to the controller 9 in real time through the connecting wire 8. After receiving the data, the controller 9 automatically analyzes and safely stores it for subsequent staff to check at any time. When it moves to the pipeline connection, the pressure storage structure 13 telescopically adjusts the length of the push arm 202 to reduce the shock of the movement of the device. At the same time, the pressure storage structure 13 uses elastic force to keep the moving wheel 5 and the auxiliary wheel 3 close to the inner wall of the pipeline. After completing the detection task, the drive motor 4 is started in the reverse direction, so that the moving wheel 5 drives the device to return to the pipeline entrance along the original route. When the device completely exits the pipeline, the control panel 12 and the data interface 11 can be used to easily access the detailed detection data stored in the controller 9 for further analysis and evaluation.

[0054] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in one embodiment: the transmission assembly includes a connecting plate 206 fixed to one side of the mounting plate 1, a fixed rod 205 fixed to one side of the connecting plate 206, a screw rod 208 rotatably connected to the inside of the connecting plate 206, a limit plate 210 rotatably connected to the outside of the screw rod 208 and connected to the fixed rod 205, a differential 204 fixed to one side of the fixed rod 205 and with a rotating end connected to the screw rod 208, a servo motor 203 connected to the rotating end of the differential 204, and a movable frame 209 sliding on the outside of the fixed rod 205 and rotatably connected to the push arm 202.

[0055] The working principle and beneficial effects of the above technical solution are as follows: when adjusting the size of the device, by starting the servo motor 203, the differential 204 drives the screw rod 208 to rotate. At the same time, since the inside of the moving frame 209 is provided with a thread meshing with the screw rod 208, the screw rod 208 is moved on the outside of the screw rod 208 by the thread of the moving frame 209 during the rotation. At the same time, the moving frame 209 slides on the outside of the fixed rod 205 to limit the moving direction of the moving frame 209 and prevent the moving frame 209 from rotating with the screw rod 208. The moving frame 209 pushes the rotating frame 201 to flip through the push arm 202, so that the four groups of rotating frames 201 are unfolded outward and drive the auxiliary wheels 3 and the moving wheels 5 to move toward the inner wall of the pipeline, so that the auxiliary wheels 3 and the moving wheels 5 are closely attached to the inside of the pipeline, so that the device is not easy to shake during the movement, and the moving range of the moving frame 209 is limited by the limit plate 210.

[0056] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in one embodiment: the rotating frame 201 and the limiting plate 210 are rotatably connected, the connecting plate 206 and the fixed rod 205 are welded into an integrated structure, the limiting plate 210 and the fixed rod 205 are welded into an integrated structure, the outer wall of the screw rod 208 is provided with an external thread, and the interior of the mobile frame 209 is provided with an internal thread that cooperates with the external thread, the rotating frame 201 is connected to the mobile frame 209 through the push arms 202, and the push arms 202 are distributed in a circular shape with equal intervals on the outer side of the mobile frame 209.

[0057] The working principle and beneficial effects of the above technical solution are as follows: the rotating frame 201 rotates around the limit plate 210 so that the push arm 202 can push the rotating frame 201 to flip, and the connecting plate 206 and the limit plate 210 are connected and fixed by the fixing rod 205 to support the screw rod 208. The threaded engagement allows the movable frame 209 to convert the rotational motion into linear motion, thereby moving on the surface of the screw rod 208. Multiple groups of rotating frames 201 and push arms 202 are used to prop up the device so that the moving wheels 5 and the auxiliary wheels 3 are close to the inner wall of the pipe.

[0058] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in one embodiment: roller bearings 207 are installed between the limiting plate 210 and the screw rod 208, and between the connecting plate 206 and the screw rod 208, respectively, and the screw rod 208 forms a rotating structure through the roller bearings 207 and the connecting plate 206.

[0059] The working principle and beneficial effects of the above technical solution are as follows: roller bearings 207 are respectively installed between the limit plate 210 and the screw rod 208, and between the connecting plate 206 and the screw rod 208. The screw rod 208 forms a rotating structure with the roller bearing 207 and the connecting plate 206. The friction between the screw rod 208 and the connecting plate 206 and the limit plate 210 is reduced through the roller bearing 207, so that the screw rod 208 rotates smoothly.

[0060] like Fig. 9 As shown, in one embodiment: the pressure storage structure 13 includes an oil storage cylinder 1302 fixed at the middle section of the push arm 202, an oil outlet 1308 opened inside one side of the oil storage cylinder 1302, a connecting hose 1301 connected to one side of the oil outlet 1308, a spring seat 1303 fixed on the outside of the oil storage cylinder 1302, a telescopic spring 1305 installed on the top of the spring seat 1303, a connecting seat 1306 fixed on the top of the telescopic spring 1305 and connected to the push arm 202, a piston rod 1307 fixed at the bottom of the connecting seat 1306 and slidably arranged inside the oil storage cylinder 1302, and a sealing piston 1304 installed at the bottom of the piston rod 1307 and slidably arranged inside the oil storage cylinder 1302.

[0061] The working principle and beneficial effects of the above technical solution are as follows: when the extension structure 2 is unfolded and pushes the moving wheel 5 and the auxiliary wheel 3 to contact the inner wall of the pipeline, the servo motor 203 continues to rotate, so that the screw rod 208 drives the push arm 202 and the rotating frame 201 to move, increasing the pressure of the moving wheel 5 and the auxiliary wheel 3 on the inner wall of the pipeline, and at the same time, the connecting seat 1306 pushes the piston rod 1307 and the sealing piston 1304 to move, squeezing the hydraulic oil in the oil storage cylinder 1302 and the telescopic spring 1305 outside the oil storage cylinder 1302, shortening the push arm 20 2, adjust the pressure of the rotating frame 201 on the moving wheel 5 and the auxiliary wheel 3, so that the pressure of the moving wheel 5 and the auxiliary wheel 3 on the inner wall of the pipeline is within a suitable range, increase the friction between the moving wheel 5 and the inner wall of the pipeline, and prevent the moving wheel 5 from slipping due to the oil on the inner wall of the pipeline. When moving to the pipeline connection, the moving wheel 5 passes through the rotating frame 201 and the push arm 202 to squeeze the connecting seat 1306, so that the connecting seat 1306 squeezes the telescopic spring 1305 and the oil inside the oil storage cylinder 1302, thereby reducing the impact of vibration on the device.

[0062] like Fig. 9 As shown, in one embodiment: the oil storage cylinders 1302 are symmetrically distributed on the vertical center line of the screw rod 208, and two groups of symmetrically arranged oil storage cylinders 1302 are connected through a connecting hose 1301.

[0063] The working principle and beneficial effects of the above technical solution are: multiple groups of oil storage cylinders 1302 are connected through connecting hoses 1301 to jointly share and absorb vibrations during movement, while helping to reduce the overall instability of the device caused by excessive unilateral or local vibrations.

[0064] like Figure 8 As shown, in one embodiment: the fitting structure 6 includes a rotating seat 607 installed on one side of the rotating frame 201, a connecting frame 601 rotatably connected to both sides of the rotating seat 607, a fixed frame 602 fixed at the top of one side of the connecting frame 601, guide wheels 603 rotatably connected to both sides of the top of the fixed frame 602, an electric telescopic rod 606 fixed inside the fixed frame 602 and connected to the electromagnetic ultrasonic thickness measuring probe 7 at the telescopic end, a guardrail 604 fixed to one side of the top of the fixed frame 602, and a wire hole 605 opened on one side of the inside of the fixed frame 602.

[0065] The working principle and beneficial effects of the above technical solution are as follows: during the extension of the rotating frame 201, the two adjacent groups of flipped rotating frames 201 drive the connecting frame 601 to move through the rotating seat 607, so that the connecting frame 601 moves toward the inner wall of the pipeline, shortening the gap between the electromagnetic ultrasonic thickness measuring probe 7 and the pipeline, and at the same time, the guide wheel 603 contacts the pipeline to support one end of the connecting frame 601, and the lifting gap of the electromagnetic ultrasonic thickness measuring probe 7 is adjusted by extending and contracting the electric telescopic rod 606 to ensure the detection accuracy of the electromagnetic ultrasonic thickness measuring probe 7. At the same time, the protective fence 604 cleans the path of the electromagnetic ultrasonic thickness measuring probe 7 to prevent objects from scratching the surface of the electromagnetic ultrasonic thickness measuring probe 7.

[0066] like Figure 8 As shown, in one embodiment: the connecting frame 601 forms a rotating structure with the rotating frame 201 through the rotating seat 607, and the guide wheels 603 are symmetrically distributed on the vertical center line of the rotating seat 607.

[0067] The working principle and beneficial effect of the above technical solution are: the rotating seat 607 rotates between the connecting frame 601 and the rotating frame 201, so that the connecting frame 601 is always parallel to the inner wall of the pipeline during the movement.

[0068] like Figure 8 As shown, in one embodiment, the fixing frame 602 and the guardrail 604 are welded into an integrated structure, and the top view cross section of the guardrail 604 is a "V" shaped inclined surface structure. The "V" shaped structure enables the guardrail 604 to easily push away foreign objects in front during the movement.

[0069] Specifically, when the present petrochemical pipeline corrosion defect detection device is used: the pipeline is opened, and the substances in the pipeline are cleared, the device is sent into the pipeline, the battery box 10 is used to provide power support for the device, the device is activated, and the extension structure 2 is operated to perform the extension action, and the moving wheel 5 and the auxiliary wheel 3 are pushed to move toward the inner wall of the pipeline, ensuring that the four groups of moving wheels 5 and the auxiliary wheels 3 are completely in contact with the inner wall. At the same time, the contact structure 6 drives the electromagnetic ultrasonic thickness measuring probe 7 assembly to move toward the inner wall of the pipeline for comprehensive detection, and the driving motor 4 is started to drive the moving wheel 5 to start rotating, thereby driving the entire device to move smoothly in the pipeline. During this process, the electromagnetic ultrasonic thickness measuring probe 7 is responsible for detecting the condition of the inner wall of the pipeline and collecting the data. The data is transmitted to the controller 9 in real time through the connecting wire 8. After receiving the data, the controller 9 automatically analyzes and safely stores it, so that the subsequent staff can check it at any time. When it moves to the pipeline connection, the pressure storage structure 13 is telescopically deformed to adjust the length of the push arm 202 to reduce the shock of the movement of the device. At the same time, the pressure storage structure 13 uses elastic force to make the moving wheel 5 and the auxiliary wheel 3 always close to the inner wall of the pipeline. After completing the detection task, the driving motor 4 is started in the reverse direction, so that the moving wheel 5 drives the device to return to the pipeline entrance along the original path. When the device completely exits the pipeline, the control board 12 and the data interface 11 can be used to conveniently access the detailed detection data stored in the controller 9 for further analysis and evaluation;

[0070] When adjusting the size of the device, the servo motor 203 is started to make the differential 204 drive the screw rod 208 to rotate. At the same time, since the inside of the moving frame 209 is provided with a thread meshing with the screw rod 208, the screw rod 208 is moved on the outside of the screw rod 208 by the thread of the moving frame 209 during the rotation process. At the same time, the moving frame 209 slides on the outside of the fixed rod 205 to limit the moving direction of the moving frame 209 and prevent the moving frame 209 from rotating with the screw rod 208. The moving frame 209 pushes the rotating frame 201 to flip through the push arm 202, so that the four groups of rotating frames 201 are unfolded outward and drive the auxiliary wheels 3 and the moving wheels 5 to move toward the inner wall of the pipeline, so that the auxiliary wheels 3 and the moving wheels 5 are closely attached to the inside of the pipeline, so that the device is not easy to shake during the movement. The friction between the screw rod 208 and the connecting plate 206 and the limit plate 210 is reduced by the roller bearing 207, so that the screw rod 208 rotates smoothly, and the moving range of the moving frame 209 is limited by the limit plate 210.

[0071] During the extension of the rotating frame 201, the two adjacent groups of flipped rotating frames 201 drive the connecting frame 601 to move through the rotating seat 607, so that the connecting frame 601 moves toward the inner wall of the pipeline, shortening the gap between the electromagnetic ultrasonic thickness measuring probe 7 and the pipeline. At the same time, the guide wheel 603 contacts the pipeline to support one end of the connecting frame 601. The lifting gap of the electromagnetic ultrasonic thickness measuring probe 7 is adjusted by the extension and contraction of the electric telescopic rod 606 to ensure the detection accuracy of the electromagnetic ultrasonic thickness measuring probe 7. At the same time, the guardrail 604 cleans the path of the electromagnetic ultrasonic thickness measuring probe 7 to prevent objects from scratching the surface of the electromagnetic ultrasonic thickness measuring probe 7.

[0072] When the extension structure 2 is unfolded and pushes the moving wheel 5 and the auxiliary wheel 3 to contact the inner wall of the pipeline, the servo motor 203 continues to rotate, so that the screw rod 208 drives the push arm 202 and the rotating frame 201 to move, increasing the pressure of the moving wheel 5 and the auxiliary wheel 3 on the inner wall of the pipeline. At the same time, the connecting seat 1306 pushes the piston rod 1307 and the sealing piston 1304 to move, squeeze the hydraulic oil inside the oil storage cylinder 1302 and the telescopic spring 1305 outside the oil storage cylinder 1302 to store pressure, shorten the length of the push arm 202, adjust the pressure of the rotating frame 201 on the moving wheel 5 and the auxiliary wheel 3, so that the pressure of the moving wheel 5 and the auxiliary wheel 3 on the inner wall of the pipeline is within a suitable range, and at the same time, the elasticity of the telescopic spring 1305 is used to increase the pressure of the moving wheel 5 and the auxiliary wheel 3 on the inner wall of the pipeline. The force and the pressure of the hydraulic oil push the connecting seat 1306 to move in the opposite direction, increasing the friction between the moving wheel 5 and the inner wall of the pipeline, and preventing the moving wheel 5 from slipping due to the oil on the inner wall of the pipeline. When moving to the pipeline connection, the moving wheel 5 squeezes the connecting seat 1306 through the rotating frame 201 and the push arm 202, so that the connecting seat 1306 squeezes the telescopic spring 1305 and the oil inside the oil storage cylinder 1302, buffering and absorbing the vibration impact, reducing the impact of vibration on the device, and connecting The hose 1301 connects multiple groups of oil storage cylinders 1302 can share and absorb the vibration during the movement, and at the same time help to reduce the overall instability of the device caused by excessive unilateral or local vibration.

[0073] In addition, an embodiment of the present invention further provides a method for detecting corrosion defects in a petrochemical pipeline, comprising the following steps:

[0074] S1: Open the pipeline and empty the contents inside the pipeline, then place the device into the pipeline, and use the battery box to provide power for the device to operate;

[0075] S2: Use the stretching structure to stretch and push the moving wheels and the auxiliary wheels to move, so that the four sets of moving wheels and the auxiliary wheels are in contact with the inner wall of the pipe. At the same time, the fitting structure drives the electromagnetic ultrasonic thickness measuring probe to move toward the inner wall of the pipe.

[0076] S3: Start the driving motor to drive the moving wheel to rotate, drive the device to move inside the pipeline, and at the same time, the electromagnetic ultrasonic thickness probe detects the inner wall of the pipeline, and transmits the detection data to the controller through the connecting wire, so that the controller analyzes and stores the pipeline data for the convenience of staff to view;

[0077] S4: When the device moves to the pipe connection, the length of the push arm is adjusted by the expansion and contraction deformation of the pressure storage structure to reduce the shock of the movement of the device. At the same time, the pressure storage structure uses elastic force to keep the moving wheel and the auxiliary wheel close to the inner wall of the pipe, thereby increasing the friction between the moving wheel and the inner wall of the pipe.

[0078] S5: After the detection is completed, the drive motor is started to rotate in the reverse direction, so that the moving wheel drives the device to return to the original path and leave the inside of the pipeline. The data stored in the controller can be viewed and read through the control panel and the data interface.

[0079] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A petrochemical pipeline corrosion defect detection device, comprising a mounting plate (1), characterized in that: Also includes: A battery box (10) is mounted on one side of the mounting plate (1), and a controller (9) is fixed to one side of the battery box (10), a control board (12) is mounted on the top end of one side of the controller (9), and a data interface (11) is mounted on the bottom end of one side of the controller (9); An extension structure (2) is arranged on the other side of the mounting plate (1), wherein the extension structure (2) comprises a transmission assembly arranged on one side of the mounting plate (1), a rotating frame (201) rotatably connected to the outside of the transmission assembly, and a push arm (202) rotatably connected to the outside of the transmission assembly and rotatably connected to the rotating frame (201); The pressure storage structure (13) is arranged inside the extension structure (2) and is used to ensure that the device moves smoothly and does not shake or slip; A moving wheel (5) is rotatably connected to the interior of the rotating frame (201), and a driving motor (4) connected to the rotating frame (201) is installed at the rotating end of the moving wheel (5); An auxiliary wheel (3) rotatably connected to the inside of the rotating frame (201) on a side away from the moving wheel (5); A fitting structure (6) arranged on the outside of the rotating frame (201); An electromagnetic ultrasonic thickness measuring probe (7) is installed inside the bonding structure (6), and a connecting wire (8) connected to a controller (9) is installed on one side of the electromagnetic ultrasonic thickness measuring probe (7); The transmission assembly comprises a connecting plate (206) fixed to one side of the mounting plate (1), a fixing rod (205) fixed to one side of the connecting plate (206), a screw rod (208) rotatably connected to the inside of the connecting plate (206), a limit plate (210) rotatably connected to the outside of the screw rod (208) and connected to the fixing rod (205), a differential (204) fixed to one side of the fixing rod (205) and having a rotating end connected to the screw rod (208), a servo motor (203) connected to the rotating end of the differential (204), and a moving frame (209) sliding on the outside of the fixing rod (205) and rotatably connected to the push arm (202); The fitting structure (6) comprises a rotating seat (607) mounted on one side of the rotating frame (201), a connecting frame (601) rotatably connected to both sides of the rotating seat (607), a fixing frame (602) fixed to the top of one side of the connecting frame (601), guide wheels (603) rotatably connected to both sides of the top of the fixing frame (602), an electric telescopic rod (606) fixed inside the fixing frame (602) and having a telescopic end connected to an electromagnetic ultrasonic thickness measuring probe (7), a guardrail (604) fixed to one side of the top of the fixing frame (602), and a wire through hole (605) provided on one side of the inside of the fixing frame (602).

2. A petrochemical pipeline corrosion defect detection device according to claim 1, characterized in that: The rotating frame (201) and the limiting plate (210) are rotatably connected, the connecting plate (206) and the fixed rod (205) are welded as an integrated structure, the limiting plate (210) and the fixed rod (205) are welded as an integrated structure, an outer wall of the screw rod (208) is provided with an external thread, and an inner wall of the movable frame (209) is provided with an internal thread that cooperates with the external thread, the rotating frame (201) is connected to the movable frame (209) via a push arm (202), and the push arms (202) are distributed in a circular shape at equal intervals on the outer side of the movable frame (209).

3. A petrochemical pipeline corrosion defect detection device according to claim 1, characterized in that: Roller bearings (207) are respectively installed between the limit plate (210) and the screw rod (208), and between the connecting plate (206) and the screw rod (208). The screw rod (208) forms a rotating structure through the roller bearing (207) and the connecting plate (206).

4. A petrochemical pipeline corrosion defect detection device according to claim 1, characterized in that: The pressure storage structure (13) comprises an oil storage cylinder (1302) fixed at the middle position of the push arm (202), an oil outlet hole (1308) opened inside one side of the oil storage cylinder (1302), a connecting hose (1301) connected to one side of the oil outlet hole (1308), a spring seat (1303) fixed outside the oil storage cylinder (1302), a telescopic spring (1305) mounted on the top of the spring seat (1303), a connecting seat (1306) fixed at the top of the telescopic spring (1305) and connected to the push arm (202), a piston rod (1307) fixed at the bottom of the connecting seat (1306) and slidably arranged inside the oil storage cylinder (1302), and a sealing piston (1304) mounted at the bottom of the piston rod (1307) and slidably arranged inside the oil storage cylinder (1302).

5. A petrochemical pipeline corrosion defect detection device according to claim 4, characterized in that: The oil storage cylinders (1302) are symmetrically distributed on the vertical center line of the screw rod (208), and two groups of symmetrically arranged oil storage cylinders (1302) are connected via a connecting hose (1301).

6. A petrochemical pipeline corrosion defect detection device according to claim 1, characterized in that: The connecting frame (601) forms a rotating structure with the rotating frame (201) through a rotating seat (607), and the guide wheels (603) are symmetrically distributed on the vertical center line of the rotating seat (607).

7. A petrochemical pipeline corrosion defect detection device according to claim 1, characterized in that: The fixing frame (602) and the guardrail (604) are welded into an integrated structure, and the cross-section of the guardrail (604) in a top view is a "V"-shaped inclined surface structure.

8. A method for detecting corrosion defects in a petrochemical pipeline using a petrochemical pipeline corrosion defect detection device as described in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Open the pipeline and empty the material inside the pipeline, then put the device into the pipeline, and use the battery box (10) to provide power for the device to operate; S2: Using the stretching structure (2) to stretch, push the moving wheels (5) and the auxiliary wheels (3) to move, so that the four sets of moving wheels (5) and the auxiliary wheels (3) are in contact with the inner wall of the pipe, and at the same time, the fitting structure (6) drives the electromagnetic ultrasonic thickness measuring probe (7) to move toward the inner wall of the pipe; S3: starting the driving motor (4) to drive the moving wheel (5) to rotate, driving the device to move inside the pipeline, while the electromagnetic ultrasonic thickness probe (7) detects the inner wall of the pipeline and transmits the detection data to the controller (9) through the connecting wire (8), so that the controller (9) analyzes and stores the pipeline data for easy viewing by the staff; S4: When the device moves to the pipe connection point, the pressure storage structure (13) is telescopically deformed to adjust the length of the push arm (202) to reduce the vibration of the device. At the same time, the pressure storage structure (13) uses elastic force to keep the moving wheel (5) and the auxiliary wheel (3) always in close contact with the inner wall of the pipe, thereby increasing the friction between the moving wheel (5) and the inner wall of the pipe; S5: After the detection is completed, the drive motor (4) is started to rotate in the reverse direction, so that the moving wheel (5) drives the device to return to the original path and leave the interior of the pipeline. The data stored in the controller (9) can be viewed and read through the control panel (12) and the data interface (11).

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