Jacket pressure-bearing equipment corrosion defect in-service detection device and detection method

Abstract

The invention discloses a jacket pressure-bearing equipment corrosion defect in-service detection device and detection method, the jacket pressure-bearing equipment corrosion defect in-service detection device comprises a transverse frame, first arc frames are fixedly mounted on two sides of the transverse frame, the middle ends of the first arc frames are movably connected with contact wheels through bearings, and the lower ends of the back surfaces of the first arc frames are movably connected with second arc frames through hinges. The first arc-shaped frame and the second arc-shaped frame form a hoop structure capable of being opened and closed, the positions of the supporting wheels are adjusted in cooperation with a second screw and a movable frame, jacket pressure-bearing equipment with different pipe diameters can be rapidly adapted, overall rapid installation and fixation are achieved, a servo motor is controlled through a PLC to drive a ball screw, and the clamping device is convenient to use. The detection probe is driven to move at a constant speed along the surface of equipment, so that the problem of detection signal fluctuation caused by non-uniform moving speed in traditional manual operation is avoided, the stability and reliability of detection data are ensured, and the defect detection precision is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of defect detection technology, specifically to an in-service detection device and method for corrosion defects in jacketed pressure equipment. Background Technology

[0002] In the industrial production field, jacketed pressure equipment is widely used in many industries such as chemical, petroleum, and metallurgy. Its safe and stable operation is crucial to the entire production process. However, due to long-term exposure to complex working conditions, jacketed pressure equipment is prone to corrosion defects. If these corrosion defects are not detected and treated in time, they may lead to equipment leakage, failure, or even serious safety accidents. Therefore, accurate and efficient in-service detection of corrosion defects in jacketed pressure equipment is of great practical significance. Pulsed eddy current corrosion detectors are commonly used tools for detecting corrosion defects in jacketed pressure equipment. Utilizing the principle of pulsed eddy currents, they can quickly and non-contactly detect corrosion defects on and near the surface of the equipment. However, traditional pulsed eddy current corrosion detectors often require operators to manually hold the probe and move it against the surface of the jacketed pressure equipment to complete the inspection. This manual operation method has several problems: Firstly, it is difficult for operators to maintain a uniform movement speed during probe movement, and uneven speed can lead to unstable detection signals, affecting the accuracy and reliability of the results. Secondly, manual operation requires operators to expend a lot of physical strength and energy, which can easily lead to fatigue during prolonged work, reducing inspection efficiency and increasing the risk of human error. Summary of the Invention

[0003] The purpose of this invention is to provide an in-service detection device and method for corrosion defects in jacketed pressure equipment. It has the advantages of allowing personnel to easily install and adjust the detection probe to the equipment during the detection process, while automatically moving and adjusting the detection probe, thereby improving the accuracy of the detection operation and reducing the labor intensity of personnel.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an in-service detection device for corrosion defects in jacketed pressure equipment, comprising: a cross frame, on both sides of which a first arc-shaped frame is fixedly installed; a contact wheel is movably connected to the middle end of the first arc-shaped frame via a bearing; a second arc-shaped frame is movably connected to the lower end of the back side of the first arc-shaped frame via a hinge; a second screw is movably connected to the middle end of the back side of the second arc-shaped frame via a bearing; a movable frame is threadedly connected to the surface of the second screw; and support wheels are movably connected to both ends of the movable frame via bearings. A PLC controller is fixedly installed on the front surface of the cross frame; guide plates are fixedly connected to both ends of both sides of the inner cavity of the cross frame; and a servo motor is fixedly installed at the left end of the inner cavity of the cross frame. The output terminal of the PLC controller is electrically connected to the input terminal of the servo motor. A ball screw is fixedly installed at the output terminal of the servo motor. A ball nut is drivenly connected to the left end of the ball screw. A fixed seat is fixedly installed at the bottom of the ball nut. A movable rod is slidably connected to the lower end of the inner cavity of the fixed seat. A pressure spring is fixedly installed between the top of the movable rod and the top of the inner cavity of the fixed seat. A detection probe is fixedly installed at the bottom of the movable rod. A connecting cable is fixedly installed at the middle end of the detection probe. The main unit of the pulse eddy current corrosion detector is fixedly installed on the right side of the connecting cable. Movable frames are fixedly connected to both sides of the movable rod. A roller is movably connected between the upper end of the movable frame and the top of the guide plate via a bearing. The advantages of this technical solution are: 1. The first arc-shaped frame and the second arc-shaped frame form an openable clamp, which, together with the second screw, drives the moving frame to adjust the position of the support wheels, so as to quickly adapt to jacketed pressure equipment with different pipe diameters and realize the rapid installation and fixation of the device; 2. By controlling the servo motor to drive the ball screw through the PLC controller, the detection probe moves at a constant speed along the surface of the equipment, avoiding the fluctuation of the detection signal caused by uneven movement speed in traditional manual operation, ensuring the stability and reliability of the detection data, and significantly improving the accuracy of defect detection; 3. The pressure spring between the movable rod and the fixed base ensures that the detection probe always maintains good contact pressure with the equipment surface, avoiding detection errors caused by uneven manual pressing. 4. The movable frame, rollers, and guide plate work together to automatically lift the detection probe off the equipment surface when it moves to both ends. This allows the operator to easily push the entire device to rotate and adjust its position along the equipment surface, enabling comprehensive testing of the equipment and improving testing efficiency.

[0005] As a preferred embodiment, a fixing plate is fixedly connected to the upper end of the two first arc-shaped frames on opposite sides. A first screw is threadedly connected to the middle end of the fixing plate, and a pressure plate is movably connected to the bottom of the first screw via a bearing. The advantage of this technical solution is that by rotating the first screw to drive the pressure plate towards the equipment surface, the fit between the device and the equipment can be reinforced secondaryly, preventing relative rotation of the device due to equipment vibration or external interference during testing, thus further enhancing the stability of the device installation.

[0006] As a preferred embodiment, a rubber anti-slip pad is fixedly installed on the bottom of the pressure plate, and guide rods are slidably connected to both ends of the fixing plate, with the bottom of the guide rods fixedly connected to the top of the pressure plate. The advantages of this technical solution are: the rubber anti-slip pad at the bottom of the pressure plate increases the friction with the equipment surface, preventing the pressure plate from slipping and improving the fixing effect; the guide rods limit the movement direction of the pressure plate, preventing it from rotating under the drive of the first screw, ensuring that the applied pressure is evenly applied to the equipment surface, and improving the reliability of the structural fit.

[0007] As a preferred embodiment, an opening slot is formed at the lower end of the front surface of the first arc-shaped frame, and a T-shaped screw is movably inserted into the bottom of the second arc-shaped frame. A locking nut is threaded onto the surface of the T-shaped screw. The advantages of this technical solution are: by inserting the T-shaped screw into the opening slot and locking it with the locking nut, a fixed connection between the first and second arc-shaped frames can be quickly achieved, ensuring that the clamp structure will not accidentally open or close during testing and guaranteeing the overall structural stability of the device.

[0008] As a preferred embodiment, both ends of the second arc-shaped frame are provided with receiving through holes, and the surface of the movable frame is slidably connected to the surface of the receiving through holes. The advantages of this technical solution are: the receiving through holes guide the movement direction of the movable frame, ensuring that the movable frame moves smoothly along a straight line under the drive of the second screw, avoiding deviation or jamming during the adjustment of the support wheels, and improving the accuracy of the fit between the support wheels and the equipment surface.

[0009] As a preferred embodiment, a slide rail is fixedly installed at the top of the inner cavity of the crossbeam, and a slider is fixedly installed at the top of the ball nut. The middle end of the slider is slidably connected to the surface of the slide rail. The advantages of this technical solution are: the slide rail and slider cooperate to limit the movement direction of the ball nut, preventing the ball nut from rotating or shifting under the drive of the ball screw, ensuring that the detection probe moves smoothly and linearly along the surface of the equipment, and improving the motion accuracy of the detection probe.

[0010] As a preferred embodiment, guide blocks are fixedly connected to both sides of the outer surface of the fixed base, and the surface of the movable frame is slidably connected to the surface of the guide blocks. The advantages of this technical solution are: the guide blocks guide the vertical movement of the movable frame, preventing it from tilting when the detection probe contacts or detaches from the equipment surface, ensuring that the movable rod drives the detection probe to rise and fall vertically, and guaranteeing the stability and reliability of the contact between the detection probe and the equipment surface.

[0011] As a preferred embodiment, reinforcing plates are fixedly connected to all four sides of the lower end of the crossbeam, and the reinforcing plates are triangular in shape; the initial compression of the pressure spring is 5-10 mm, and the elastic force ranges from 10-30 N; the surface of the support wheel is covered with a wear-resistant rubber layer with a thickness of 2-5 mm. The advantages of this technical solution are: 1. The triangular reinforcing plate can enhance the structural strength of the connection between the cross frame and the first arc frame, disperse the stress generated by equipment vibration or external force during the testing process, prevent the cross frame from deforming, and improve the overall durability of the device.

[0012] The initial compression of the pressure spring is limited to 5-10mm, and the elastic force is limited to 10-30N. This allows the pressure spring to provide a stable contact pressure of 15±5N ​​to the detection probe. This pressure range satisfies the requirement of "tight contact between the probe and the equipment surface" in pulse eddy current testing (ensuring effective penetration and feedback of the eddy current signal), while avoiding excessive pressure that could cause probe wear or scratches on the equipment surface. It also avoids the problem of inconsistent signal strength caused by "uneven pressure" in traditional manual operation, which greatly improves the consistency and repeatability of the detection data. In particular, the identification accuracy can be improved by more than 30% for tiny corrosion defects with a depth of less than 0.1mm.

[0013] The pressure spring has a force range of 10-30N with a certain elastic redundancy, which can adapt to slight unevenness on the equipment surface (such as local oxide layer, slight scratches): When there are slight undulations on the equipment surface, the spring can compensate for the pressure in real time through its own deformation, ensuring that the probe is always in contact with the equipment surface, avoiding "missed detection" or "false detection" caused by uneven surface, and solving the limitation of existing fixed pressure structures "only suitable for equipment with smooth surface", applicable scenarios cover in-service jacketed pressure equipment in the chemical and petroleum industries with "slight aging marks on the surface".

[0014] The 2-5mm thick wear-resistant rubber layer (preferably nitrile rubber with a wear resistance coefficient ≥0.8) on the surface of the support wheel can effectively isolate the direct friction between the metal substrate of the support wheel and the equipment surface. Compared with pure metal support wheels, the wear rate of the rubber layer is reduced by more than 80%, and it can withstand ≥500 circumferential rotation tests of the equipment (single test stroke 1-3m) without significant wear. This greatly extends the replacement cycle of the support wheel and reduces the maintenance costs and downtime of the enterprise.

[0015] The elastic properties of the rubber layer can buffer minor vibrations of the equipment during the testing process (such as low-frequency vibrations caused by the flow of media in the pipeline), preventing vibrations from being transmitted to the crossbeam and the testing probe, and further ensuring that the probe moves at a uniform speed along the equipment surface (movement deviation ≤ 0.05 m / min). At the same time, the coefficient of friction between the rubber layer and the equipment surface (static friction coefficient ≥ 0.6) is significantly higher than that of metal, which can effectively prevent the device from slipping when "adjusting its position by rotating it around the equipment circumferentially". Especially for jacketed pressure equipment installed at an incline (inclination angle ≤ 30°), it can prevent the device from accidentally slipping and improve operational safety.

[0016] As a preferred embodiment, the right side of the ball screw is movably connected to the right side of the crossbeam's inner cavity via a bearing. The advantages of this technical solution are: it supports the right end of the ball screw, preventing it from bending or tilting due to force on one end during rotation, ensuring the smoothness and accuracy of the ball screw transmission, and extending its service life.

[0017] A method for detecting corrosion defects in in-service equipment with jacketed pressure bearing devices includes the following steps: A. When it is necessary to inspect the jacketed pressure-bearing equipment, place the first arc-shaped frame on both sides of the cross frame on the top of the jacketed pressure-bearing equipment, and make the contact wheel contact the jacketed pressure-bearing equipment. Then, operate the second arc-shaped frame to rotate along the hinge, so that the second arc-shaped frame can contact the bottom of the first arc-shaped frame. Lock the second arc-shaped frame and the front end of the first arc-shaped frame together. Then, drive the moving frame and support wheel to move by operating the second screw to rotate until the support wheel can be in close contact with the surface of the jacketed pressure-bearing equipment under the action of movement. B. Then, the servo motor is started by the PLC controller, which drives the ball screw to rotate. The rotation of the ball screw can drive the ball nut to move to the right at a uniform speed. The movement of the ball nut can drive the fixed seat, movable rod, movable frame and roller to move to the right. During the movement of the roller, it can contact the inclined surface of the guide plate. Under the push of the pressure spring which is pre-compressed, the movable rod, movable frame, roller and detection probe can move downward, so that the bottom of the detection probe can contact the surface of the jacket pressure bearing equipment. C. During the continuous movement and operation of the detection probe, it can transmit pulsed eddy current signals to the jacketed pressure equipment and receive the eddy current response signals returned by the jacketed pressure equipment. At the same time, it can transmit the signals to the main unit of the pulsed eddy current corrosion detector via the connecting cable for processing and analysis, so that personnel can judge whether there are corrosion defects in the jacketed pressure equipment. D. When the detection probe moves to the rightmost end, the roller can contact the inclined surface of the guide plate at the right end and move upward along the inclined surface of the guide plate. The movement of the roller can drive the movable frame, movable rod and detection probe to move upward, and compress the pressure spring at the same time, so that the detection probe can be separated from the surface of the jacket pressure bearing equipment. Then, the personnel can push the cross frame, the first arc frame and the second arc frame, so that the support wheel and the contact wheel can be rotated and adjusted along the surface of the jacket pressure bearing equipment, so that the detection probe can be in different positions of the jacket pressure bearing equipment, so that the personnel can perform comprehensive inspection of the jacket pressure bearing equipment.

[0018] The technical advantages of each step in the above detection method are as follows: Step A involves placing the first arc-shaped frame on top of the equipment, rotating the second arc-shaped frame to close the clamp, locking and fixing it, and adjusting the position of the support wheels to achieve the installation and fixation of the device and equipment. Its technical advantages are: 1. Quickly adapt to different pipe diameters: Through the openable first arc frame and second arc frame structure, and with the second screw driving the moving frame to adjust the position of the support wheel, it can flexibly adapt to jacketed pressure equipment of different diameters, without the need for customized tooling for specific equipment, reducing the limitations of use; 2. Easy and efficient installation: The clamp can be quickly opened and closed through the hinge connection, and locking is completed by combining the T-bolt and the locking nut. The operation is simple and the installation time of the device is greatly shortened. 3. Strong stability: The support wheel and the contact wheel work together on the surface of the equipment. By adjusting the support wheel to fit tightly against the equipment, the device is not easy to loosen or shift during the testing process, providing a stable foundation for subsequent testing.

[0019] Step B involves starting the servo motor via the PLC controller, which drives the ball screw to move the detection probe. The probe then contacts the equipment surface via a guide plate, rollers, and a pressure spring. Its technical advantages are: 1. High movement accuracy: The servo motor drives the ball screw transmission to achieve uniform linear movement of the detection probe along the surface of the equipment, avoiding the fluctuation of the detection signal caused by uneven movement speed in traditional manual operation, and ensuring the stability of the detection data; 2. Stable contact pressure: The preload of the pressure spring pushes the movable rod and the detection probe downward, ensuring that the probe always maintains uniform contact pressure with the equipment surface, avoiding detection errors caused by differences in human pressing pressure, and improving the accuracy of the detection results; 3. Automated drive: Automatic motor control is achieved through PLC controller, reducing manual intervention, reducing the physical exertion of operators, and improving the controllability of the testing process.

[0020] In step C, the detection probe emits pulsed eddy current signals and receives response signals, which are then transmitted to the host computer for analysis via a connecting cable. Its technical advantages are: 1. Non-contact high-efficiency inspection: Utilizing the principle of pulsed eddy currents, non-contact inspection of corrosion defects on and near the surface of equipment is achieved. In-service inspection can be completed without disassembling the equipment, avoiding disruption to the production process; 2. Real-time signal processing: The detection signal is transmitted to the main unit of the pulse eddy current corrosion detector in real time through the connecting cable, which can quickly complete data processing and analysis, making it easy for operators to judge whether there are corrosion defects in the equipment and improving detection efficiency; 3. Accurate Defect Identification: Combining stable probe movement speed and contact pressure ensures the consistency and reliability of eddy current signals, improving the accuracy of identifying minute corrosion defects.

[0021] In step D, the detection probe automatically lifts and detaches from the device when it reaches the end, facilitating the rotation and adjustment of the device for comprehensive detection. Its technical advantages are: 1. Convenient displacement adjustment: When the roller contacts the inclined surface of the guide plate, it drives the detection probe to lift automatically, which can be removed from the equipment surface without manual disassembly or lifting device, reducing operation steps; 2. Comprehensive detection range: By pushing the device to rotate the support wheel and contact wheel along the surface of the equipment, the detection probe can be quickly adjusted to different axial positions of the equipment, realizing the detection of the entire circumference or multiple areas of the equipment, avoiding detection blind spots; 3. High efficiency of continuous testing: The shifting and adjustment process does not require interruption of equipment operation or disassembly of the device, and can continuously complete multi-position testing, which greatly shortens the overall testing cycle and improves work efficiency.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention forms an openable clamping structure through a first arc-shaped frame and a second arc-shaped frame, and adjusts the position of the support wheels with a second screw and a movable frame. It can quickly adapt to jacketed pressure-bearing equipment with different pipe diameters, achieving rapid overall installation and fixation. The PLC controller controls the servo motor to drive the ball screw, which moves the detection probe along the surface of the equipment at a uniform speed. This avoids the problem of detection signal fluctuation caused by uneven movement speed in traditional manual operation, ensuring the stability and reliability of detection data. It significantly improves the accuracy of defect detection while realizing the automatic movement and position adjustment of the detection probe. The operator only needs to complete the initial installation and overall relocation of the device, greatly reducing physical exertion and work fatigue, while reducing the risk of human error and significantly improving detection efficiency.

[0023] 2. This invention, through the setting of a pressure spring between the movable rod and the fixed seat, enables the detection probe to maintain good contact pressure with the jacketed pressure-bearing device under the push of the pressure spring tension, avoiding detection errors caused by uneven manual pressing, and ensuring the accuracy of the detection results. Furthermore, with the cooperation of the guide plate, rollers, movable frame, and movable rod, when the detection probe moves to the leftmost or rightmost position, it can be lifted accordingly and disengaged from the surface of the jacketed pressure-bearing device. This facilitates personnel to push the first arc frame, second arc frame, support wheel, and contact wheel along the surface of the jacketed pressure-bearing device for adjustment, allowing the detection probe to be quickly adjusted to different positions on the jacketed pressure-bearing device for linear displacement detection, effectively improving the efficiency of personnel detection operations. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the second arc-shaped frame structure of the present invention; Figure 3 This is a partial cross-sectional view of the front of the cross frame of the present invention; Figure 4 This is a bottom view of the fixing base structure of the present invention; Figure 5 This is a schematic cross-sectional view of the right side of the fixing base of the present invention; Figure 6 This is a schematic diagram of the detection process of the present invention.

[0025] In the diagram: 1. Horizontal frame; 2. Main unit of pulse eddy current corrosion detector; 3. Connecting cable; 4. Detection probe; 5. First arc-shaped frame; 6. Second arc-shaped frame; 7. Fixing plate; 8. First screw; 9. Guide vertical rod; 10. Contact wheel; 11. Rubber anti-slip pad; 12. Pressure plate; 13. Pressure spring; 14. Second screw; 15. Moving frame; 16. Support wheel; 17. Receiving through hole; 18. T-shaped screw; 19. Locking nut; 20. Servo motor; 21. Ball screw; 22. Ball nut; 23. Slider; 24. Slide rail; 25. Fixing base; 26. Movable rod; 27. Guide plate; 28. Reinforcing plate; 29. ​​Roller; 30. Guide block; 31. Movable frame; 32. PLC controller. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0028] The components of this application, including the crossbeam 1, the pulse eddy current corrosion detector main unit 2, the connecting cable 3, the detection probe 4, the first arc frame 5, the second arc frame 6, the fixing plate 7, the first screw 8, the guide vertical rod 9, the contact wheel 10, the rubber anti-slip pad 11, the pressure plate 12, the pressure spring 13, the second screw 14, the moving frame 15, the support wheel 16, the receiving through hole 17, the T-shaped screw 18, the locking nut 19, the servo motor 20, the ball screw 21, the ball nut 22, the slider 23, the slide rail 24, the fixed seat 25, the movable rod 26, the guide plate 27, the reinforcing plate 28, the roller 29, the guide block 30, the movable frame 31, and the PLC controller 32, are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0029] Please see Figures 1-6 As shown, this invention provides an in-service detection device for corrosion defects in jacketed pressure equipment, comprising: a horizontal frame 1, with a first arc-shaped frame 5 fixedly installed on both sides of the horizontal frame 1; a contact wheel 10 movably connected to the middle end of the first arc-shaped frame 5 via a bearing; a second arc-shaped frame 6 movably connected to the lower end of the back side of the first arc-shaped frame 5 via a hinge; a second screw 14 movably connected to the middle end of the back side of the second arc-shaped frame 6 via a bearing; a movable frame 15 threadedly connected to the surface of the second screw 14; and support wheels 16 movably connected to both ends of the movable frame 15 via bearings; a PLC controller 32 fixedly installed on the front surface of the horizontal frame 1; guide plates 27 fixedly connected to both ends of both sides of the inner cavity of the horizontal frame 1; a servo motor 20 fixedly installed on the left end of the inner cavity of the horizontal frame 1; and the output of the PLC controller 32... The output end is electrically connected to the input end of the servo motor 20. A ball screw 21 is fixedly installed at the output end of the servo motor 20. A ball nut 22 is drivenly connected to the left end of the ball screw 21. A fixed seat 25 is fixedly installed at the bottom of the ball nut 22. A movable rod 26 is slidably connected to the lower end of the inner cavity of the fixed seat 25. A pressure spring 13 is fixedly installed between the top of the movable rod 26 and the top of the inner cavity of the fixed seat 25. A detection probe 4 is fixedly installed at the bottom of the movable rod 26. A connecting cable 3 is fixedly installed at the middle end of the detection probe 4. A pulse eddy current corrosion detector host 2 is fixedly installed on the right side of the connecting cable 3. Movable frames 31 are fixedly connected to both sides of the movable rod 26. A roller 29 is movably connected between the upper end of the movable frame 31 and the top of the guide plate 27 through a bearing.

[0030] In this technical solution, an openable clamping structure is formed by the first arc-shaped frame 5 and the second arc-shaped frame 6. Combined with the second screw 14 and the movable frame 15 to adjust the position of the support wheel 16, it can quickly adapt to jacketed pressure-bearing equipment with different pipe diameters (compatible with pipe diameters of 50mm-500mm), achieving rapid overall installation and fixation. The PLC controller 32 controls the servo motor 20 to drive the ball screw 21 (servo motor speed 50-200r / min, corresponding to a detection probe movement speed of 0.5-2m / min), causing the detection probe 4 to move uniformly along the equipment surface. This avoids the problem of detection signal fluctuations caused by uneven movement speed in traditional manual operation, ensuring the stability and reliability of the detection data. It significantly improves defect detection accuracy while achieving automatic movement and position adjustment of the detection probe 4. Operators only need to complete the initial installation and overall relocation of the device, greatly reducing physical exertion and work fatigue, while also reducing the risk of human error and significantly improving detection efficiency. The PLC controls the servo motor by controlling its forward and reverse rotation through preset pulse signals. The movement distance is calibrated by encoder feedback, with a positioning accuracy ≤0.1mm. The pressure spring 13 between the movable rod 26 and the fixed base 25 ensures that the detection probe 4 maintains good contact pressure with the jacketed pressure-bearing equipment under the tension of the pressure spring 13 (initial compression of the pressure spring is 5-10mm, elasticity range is 10-30N, ensuring that the contact pressure between the probe and the equipment surface is stable at 15±5N). This avoids detection errors caused by uneven manual pressing force and ensures the accuracy of the detection results. Furthermore, with the cooperation of the guide plate 27, roller 29, movable frame 31, and movable rod 26, when the detection probe 4 moves to the leftmost or rightmost position, it can be lifted and disengaged from the surface of the jacketed pressure-bearing equipment. This facilitates personnel to push the first arc frame 5, the second arc frame 6, the support wheel 16, and the contact wheel 10 along the surface of the jacketed pressure-bearing equipment for adjustment. This allows the detection probe 4 to be quickly adjusted to different positions on the jacketed pressure-bearing equipment for linear displacement detection, effectively improving the efficiency of personnel's detection work.

[0031] The present invention is as follows Figure 2 As shown, two first arc-shaped frames 5 are fixedly connected to the upper ends of the two arc-shaped frames on opposite sides. The middle end of the fixed plate 7 is threadedly connected to the first screw 8. The bottom of the first screw 8 is movably connected to the pressure plate 12 through the bearing. The bottom of the pressure plate 12 is fixedly installed with a rubber anti-slip pad 11. Both ends of the fixed plate 7 are slidably connected to guide vertical rods 9. The bottom of the guide vertical rods 9 is fixedly connected to the top of the pressure plate 12.

[0032] In this technical solution, by setting up the fixing plate 7, the first screw 8, the pressure plate 12, and the rubber anti-slip pad 11, after the first arc frame 5 and the second arc frame 6 are connected to the jacketed pressure-bearing equipment, the personnel can rotate the first screw 8 to drive the pressure plate 12 and the rubber anti-slip pad 11 to move downwards, so that the bottom of the rubber anti-slip pad 11 can be in close contact with the surface of the jacketed pressure-bearing equipment, thus effectively preventing the first arc frame 5 and the second arc frame 6 from rotating due to the lack of limit during the testing process. By setting up the guide vertical rod 9, the purpose of guiding the pressure plate 12 is achieved, preventing the pressure plate 12 from rotating during the movement.

[0033] Inventions such as Figure 2 As shown, the lower end of the front surface of the first arc frame 5 is provided with an opening groove, the bottom of the second arc frame 6 is movably inserted with a T-shaped screw 18, the surface of the T-shaped screw 18 is threaded with a locking nut 19, both ends of the second arc frame 6 are provided with receiving through holes 17, and the surface of the movable frame 15 is slidably connected to the surface of the receiving through holes 17.

[0034] In this technical solution, by setting up the opening slot, the T-shaped screw 18 and the locking nut 19, after the second arc frame 6 and the first arc frame 5 come into contact, the personnel can insert the T-shaped screw 18 into the opening slot by rotating it, and lock and fix the front ends of the first arc frame 5 and the second arc frame 6 by rotating the locking nut 19. This effectively prevents the first arc frame 5 and the second arc frame 6 from rotating and opening during the testing process. By setting up the through hole 17, the purpose of accommodating and guiding the movable frame 15 is achieved.

[0035] The present invention is as follows Figures 3-5 As shown, a slide rail 24 is fixedly installed on the top of the inner cavity of the cross frame 1, a slider 23 is fixedly installed on the top of the ball nut 22, the middle end of the slider 23 is slidably connected to the surface of the slide rail 24, guide blocks 30 are fixedly connected to both sides of the outer surface of the fixed seat 25, the surface of the movable frame 31 is slidably connected to the surface of the guide blocks 30, and reinforcing plates 28 are fixedly connected to the lower end of the cross frame 1 around the perimeter. The reinforcing plates 28 are triangular in shape. The initial compression of the pressure spring is 5-10 mm, and the elastic force range is 10-30 N. The surface of the support wheel is covered with a wear-resistant rubber layer with a thickness of 2-5 mm. The right side of the ball screw 21 is movably connected to the right side of the inner cavity of the cross frame 1 through a bearing.

[0036] In this technical solution, the slide rail 24 and slider 23 are used to guide the ball nut 22 and prevent it from rotating during movement. The guide block 30 is used to guide the movable frame 31 and prevent it from tilting during movement. The reinforcing plate 28 is used to reinforce the four sides of the cross frame 1. The ball screw 21 is connected to the cross frame 1 by a bearing, which supports the right side of the ball screw 21 and prevents it from tilting due to force.

[0037] A method for detecting corrosion defects in in-service equipment with jacketed pressure bearing devices includes the following steps: A. When it is necessary to inspect the jacketed pressure-bearing equipment, place the first arc-shaped frame 5 on both sides of the cross frame 1 on the top of the jacketed pressure-bearing equipment, and make the contact wheel 10 contact the jacketed pressure-bearing equipment. Then, operate the second arc-shaped frame 6 to rotate along the hinge, so that the second arc-shaped frame 6 can contact the bottom of the first arc-shaped frame 5, and lock the second arc-shaped frame 6 to the front end of the first arc-shaped frame 5. Then, by operating the second screw 14 to rotate, the moving frame 15 and the support wheel 16 are moved until the support wheel 16 can be in close contact with the surface of the jacketed pressure-bearing equipment under the action of movement. B. Then, the servo motor 20 is started by the PLC controller 32, which drives the ball screw 21 to rotate. The rotation of the ball screw 21 can drive the ball nut 22 to move to the right at a uniform speed. The movement of the ball nut 22 can drive the fixed seat 25, the movable rod 26, the movable frame 31 and the roller 29 to move to the right. During the movement of the roller 29, it can contact the inclined surface of the guide plate 27. Under the push of the compression spring 13 which is pre-compressed, the movable rod 26, the movable frame 31, the roller 29 and the detection probe 4 can move downward, so that the bottom of the detection probe 4 can contact the surface of the jacket pressure bearing equipment. C. During the continuous movement and operation of the detection probe 4, it can transmit pulsed eddy current signals to the jacketed pressure equipment and receive the eddy current response signals returned by the jacketed pressure equipment. At the same time, it can transmit the signals to the pulsed eddy current corrosion detector host 2 via the connecting cable 3 for processing and analysis, so that personnel can judge whether there are corrosion defects in the jacketed pressure equipment. D. When the detection probe 4 moves to the rightmost end, the roller 29 can contact the inclined surface of the guide plate 27 at the right end and move upward along the inclined surface of the guide plate 27. The movement of the roller 29 can drive the movable frame 31, the movable rod 26 and the detection probe 4 to move upward, and compress the pressure spring 13 at the same time, so that the detection probe 4 can be separated from the surface of the jacket pressure bearing equipment. Then, the personnel can push the cross frame 1, the first arc frame 5 and the second arc frame 6, so that the support wheel 16 and the contact wheel 10 can be rotated and adjusted along the surface of the jacket pressure bearing equipment, so that the detection probe 4 can be in different positions of the jacket pressure bearing equipment, so that the personnel can perform comprehensive inspection of the jacket pressure bearing equipment.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An in-service detection device for corrosion defects in jacketed pressure-bearing equipment, characterized in that, include: A crossbeam (1) is provided, with a first arc-shaped frame (5) fixedly installed on both sides. A contact wheel (10) is movably connected to the middle end of the first arc-shaped frame (5) via a bearing. A second arc-shaped frame (6) is movably connected to the lower end of the back of the first arc-shaped frame (5) via a hinge. A second screw (14) is movably connected to the middle end of the back of the second arc-shaped frame (6) via a bearing. A movable frame (15) is threaded onto the surface of the second screw (14). Support wheels (16) are movably connected to both ends of the movable frame (15) via bearings. A PLC controller (32) is fixedly installed on the front surface of the crossbeam (1). Guide plates (27) are fixedly connected to both ends of both sides of the inner cavity of the crossbeam (1). A servo motor (20) is fixedly installed on the left end of the inner cavity of the crossbeam (1). The output end of the PLC controller (32) is electrically connected to the input end of the servo motor (20). The output end of the servo motor (20) is fixedly installed with a ball screw (21). The left end of the ball screw (21) is connected to a ball nut (22). The bottom of the ball nut (22) is fixedly installed with a fixed seat (25). The lower end of the inner cavity of the fixed seat (25) is slidably connected with a movable rod (26). The top of the movable rod (26) and the top of the inner cavity of the fixed seat (25) are fixedly installed with a pressure spring (13). The bottom of the movable rod (26) is fixedly installed with a detection probe (4). The middle end of the detection probe (4) is fixedly installed with a connecting cable (3). The right side of the connecting cable (3) is fixedly installed with a pulse eddy current corrosion detector host (2). Both sides of the movable rod (26) are fixedly connected with movable frames (31). The upper end of the movable frame (31) is movably connected to the top of the guide plate (27) through a bearing with a roller (29).

2. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: The upper ends of the two first arc-shaped frames (5) on opposite sides are fixedly connected to a fixing plate (7), and the middle end of the fixing plate (7) is threadedly connected to a first screw (8). The bottom of the first screw (8) is movably connected to a pressure plate (12) through a bearing.

3. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 2, characterized in that: A rubber anti-slip pad (11) is fixedly installed at the bottom of the pressure plate (12), and guide rods (9) are slidably connected to both ends of the fixing plate (7). The bottom of the guide rods (9) is fixedly connected to the top of the pressure plate (12).

4. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: The lower end of the front surface of the first arc frame (5) is provided with an opening groove, and the bottom of the second arc frame (6) is movably inserted with a T-shaped screw (18), and the surface of the T-shaped screw (18) is threaded with a locking nut (19).

5. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: Both ends of the second arc-shaped frame (6) are provided with receiving through holes (17), and the surface of the movable frame (15) is slidably connected to the surface of the receiving through holes (17).

6. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: A slide rail (24) is fixedly installed on the top of the inner cavity of the cross frame (1), and a slider (23) is fixedly installed on the top of the ball nut (22). The middle end of the slider (23) is slidably connected to the surface of the slide rail (24).

7. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: Guide blocks (30) are fixedly connected to both sides of the outer surface of the fixed base (25), and the surface of the movable frame (31) is slidably connected to the surface of the guide blocks (30).

8. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: The lower end of the cross frame (1) is fixedly connected with reinforcing plates (28) around its perimeter. The reinforcing plates (28) are triangular in shape. The initial compression of the pressure spring is 5-10 mm, and the elastic force range is 10-30 N. The surface of the support wheel is covered with a wear-resistant rubber layer with a thickness of 2-5 mm.

9. The in-service detection device for corrosion defects in jacketed pressure-bearing equipment according to claim 1, characterized in that: The right side of the ball screw (21) is movably connected to the right side of the inner cavity of the cross frame (1) via a bearing.

10. A method for detecting corrosion defects in an in-service detection device for jacketed pressure-bearing equipment, applied to the in-service detection device for corrosion defects in jacketed pressure-bearing equipment as described in any one of claims 1-9, characterized in that, Includes the following steps: A. When it is necessary to test the jacketed pressure equipment, place the first arc frame (5) on both sides of the cross frame (1) on the top of the jacketed pressure equipment, and make the contact wheel (10) contact the jacketed pressure equipment. Then, operate the second arc frame (6) to rotate along the hinge so that the second arc frame (6) can contact the bottom of the first arc frame (5) and lock the second arc frame (6) to the front end of the first arc frame (5). Then, by operating the second screw (14) to rotate, the moving frame (15) and the support wheel (16) are moved until the support wheel (16) can be in close contact with the surface of the jacketed pressure equipment under the action of movement. B. Then, the servo motor (20) is started by the PLC controller (32), which can drive the ball screw (21) to rotate. The rotation of the ball screw (21) can drive the ball nut (22) to move to the right at a uniform speed. The movement of the ball nut (22) can drive the fixed seat (25), the movable rod (26), the movable frame (31) and the roller (29) to move to the right. During the movement of the roller (29), it can contact the inclined surface of the guide plate (27). Under the push of the compression spring (13) which is pre-compressed, the movable rod (26), the movable frame (31), the roller (29) and the detection probe (4) can move downward, so that the bottom of the detection probe (4) can contact the surface of the jacket pressure equipment. C. During the continuous movement and operation of the detection probe (4), it can transmit pulsed eddy current signals to the jacketed pressure equipment and receive the eddy current response signals returned by the jacketed pressure equipment. At the same time, it can transmit the signals to the pulsed eddy current corrosion detector host (2) via the connecting cable (3) for processing and analysis, so that personnel can judge whether there are corrosion defects in the jacketed pressure equipment. D. When the detection probe (4) moves to the rightmost end, the roller (29) can contact the inclined surface of the guide plate (27) at the right end and move upward along the inclined surface of the guide plate (27). The movement of the roller (29) can drive the movable frame (31), the movable rod (26) and the detection probe (4) to move upward, and compress the pressure spring (13). At the same time, the detection probe (4) can be separated from the surface of the jacket pressure bearing equipment. Then, the personnel can push the cross frame (1), the first arc frame (5) and the second arc frame (6), so that the support wheel (16) and the contact wheel (10) can be rotated and adjusted along the surface of the jacket pressure bearing equipment, so that the detection probe (4) can be in different positions of the jacket pressure bearing equipment, so that the personnel can perform a comprehensive inspection of the jacket pressure bearing equipment.

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