A scanning method based on immersion non-contact pipe scanning equipment

Abstract

The invention relates to a scanning method based on an immersion-type contactless pipe scanning device. The scanning method based on the immersion-type contactless pipe scanning device utilizes a flipping mechanism to drive a clamping and rotating mechanism to flip upward or downward. When flipping downward, the lower half of the pipe is immersed in a liquid medium in an immersion tank. During the scanning and inspection process, the pipe is driven to rotate around its axis by the clamping and rotating mechanism. During the rotation process, the probe performs a contactless scanning and inspection operation on the current inspection section of the pipe. During the scanning and inspection process, the probe does not contact the pipe, and the liquid medium in the immersion tank is used as the sound wave propagation medium of the probe, thereby improving the inspection quality and inspection accuracy of the pipe. At the same time, within the specification range of the equipment, it is possible to perform a contactless scanning and inspection operation on pipes of any length but different diameters that meet the requirements of the equipment, especially special-shaped pipes with diameter changes along the length direction, thereby improving the applicability of contactless scanning and inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic detection, and in particular to a scanning method based on an immersion-type contactless pipe scanning device. Background Art

[0002] At present, when ultrasonic scanning and testing the surface of pipes, the water spray method is mostly used, that is, water is sprayed on the surface of the pipe, and the detection probe is used to directly scan and detect the surface of the pipe. Although this water spray method is simple to operate, it must contact the surface of the pipe during scanning, and it is inevitable that the surface of the pipe will be worn during the detection process. Therefore, the water spray method is generally used for rough processing products such as steel profiles that have low requirements on the surface of the pipe. As the requirements for the detection accuracy of pipes are gradually increasing, some pipes used as targets require that no wear should be caused to their surfaces during detection, and even require non-contact detection. Therefore, it is also necessary to improve the corresponding scanning method to meet the needs of non-contact scanning of pipes. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a scanning method based on an immersion-type non-contact pipe scanning device, which can accurately detect pipes without contacting them, thereby improving the detection quality and accuracy of pipes. The technical solution adopted is as follows:

[0004] A scanning method based on an immersion-type non-contact pipe scanning device, characterized in that: the immersion-type non-contact pipe scanning device comprises an immersion tank, a flipping mechanism, a clamping and rotating mechanism and a scanning mechanism; the flipping mechanism is arranged above the immersion tank, the clamping and rotating mechanism is installed on the flipping mechanism, and the flipping mechanism can drive the clamping and rotating mechanism to flip upward or downward; the scanning mechanism is arranged on one side of the flipping mechanism, and the scanning mechanism comprises an adjustable probe;

[0005] The scanning operation includes the following steps:

[0006] (1) The clamping and rotating mechanism fixes the pipe so that the pipe is placed horizontally above the immersion tank;

[0007] (2) Adjust the relative position between the probe of the scanning mechanism and the pipe, and immerse the probe in the liquid medium of the immersion tank;

[0008] (3) Start the flipping mechanism to drive the clamping and rotating mechanism to flip downward, and the flipping mechanism stops moving when the lower half of the tube is immersed in the liquid medium in the immersion tank;

[0009] (4) The clamping and rotating mechanism drives the pipe to rotate around its axis. During the rotation process, the probe performs non-contact scanning and testing on the pipe in the circumference of the current detection interval. The detection interval is the detection distance that the probe can cover. During the scanning and testing process of the current detection interval, the relative position of the probe and the pipe remains unchanged;

[0010] (5) After scanning and inspecting the current inspection section of the pipe, adjust the probe to move along the length direction of the pipe to the next inspection section, and perform non-contact scanning and inspection operations on the circumference of the next inspection section;

[0011] (6) Repeat steps (4) and (5) until the probe completes non-contact scanning and inspection operations in all inspection areas of the pipe;

[0012] (7) After completing the scanning and inspection of the entire section of the pipe, the flipping mechanism is started again to drive the clamping and rotating mechanism to flip upward, so that the pipe leaves the liquid medium in the immersion tank.

[0013] The liquid medium in the immersion tank is used as the sound wave propagation medium of the probe during the whole scanning and testing process. During the whole scanning and testing process, the probe needs to be immersed in the liquid medium of the immersion tank. Different liquid media can be filled in the immersion tank according to the needs of the scanning and testing operation. In the absence of special requirements, water is generally used as the scanning and testing medium to reduce the scanning and testing cost.

[0014] The above-mentioned flipping mechanism is used to drive the clamping and rotating mechanism to flip upward or downward, so that the clamping and rotating mechanism clamps the entire pipe and flips it downward to immerse it in the liquid medium of the immersion tank or leave the immersion tank; when the pipe is immersed in the liquid medium, the flipping mechanism stops moving; when the pipe completes all scanning and inspection operations, the flipping mechanism resets and flips the entire pipe upward to leave the immersion tank. On the other hand, when the scanning and inspection operation is completed, the flipping mechanism drives the clamping and rotating mechanism to flip upward to leave the immersion tank, which helps to reduce the immersion corrosion maintenance of the equipment and facilitates the loading and unloading of the pipes to be inspected.

[0015] The flipping mechanism can use a servo motor to drive the flipping shaft to rotate. Specifically, in a specific scheme, the flipping mechanism includes a fixed seat, a flipping motor, a flipping shaft and a flipping seat. Both ends of the flipping shaft are rotatably mounted on the fixed seat. The flipping shaft is located above the immersion tank. The flipping seat is fixedly mounted on the flipping shaft and rotates with the flipping seat. One end of the flipping shaft is transmission-connected to the output shaft of the flipping motor.

[0016] The clamping and rotating mechanism is used to clamp the pipe and can drive the pipe to rotate along its axial direction.

[0017] The above-mentioned scanning mechanism is used to perform contactless scanning and inspection operations on the pipe. The scanning mechanism is provided with an adjustable probe. The probe can adjust its relative position with the pipe, and can also translate along the length direction of the pipe to adjust its relative horizontal position with the pipe, so as to perform circumferential scanning and inspection operations on the pipe in different inspection intervals of the pipe.

[0018] In the above step (4), during the scanning and inspection operation of the current inspection interval, the relative position of the probe and the pipe remains unchanged to ensure the consistency and stability of the scanning results.

[0019] As a preferred embodiment of the present invention, the clamping and rotating mechanism comprises a first clamping and rotating assembly and a second clamping and rotating assembly, wherein the first clamping and rotating assembly is fixedly arranged at the power output end of the flipping mechanism, and the second clamping and rotating assembly is movably arranged at the power output end of the flipping mechanism; in the step (1), when the clamping and rotating mechanism clamps and fixes the pipe, the second clamping and rotating assembly first translates to a corresponding position according to the length of the pipe, and the first clamping and rotating assembly and the second clamping and rotating assembly then clamp the pipe from both ends of the pipe.

[0020] As a further preferred embodiment of the present invention, the first clamping and rotating assembly includes a first driving device and a first conical top, the first driving device is fixedly mounted on the power output end of the flipping mechanism, and the first conical top is mounted on the power output end of the first driving device; the second clamping and rotating assembly includes a translation driving mechanism, a driven device and a second conical top, the translation driving mechanism is arranged on the power output end of the flipping mechanism, the driven device is mounted on the power output end of the translation driving mechanism, and the second conical top is mounted on the linkage end of the driven device; the cone portion of the first conical top is opposite to the cone portion of the second conical top, and the axis of the first conical top and the axis of the cone portion of the second conical top are on the same horizontal line.

[0021] In step (1), the translation drive mechanism first translates the second conical head to the corresponding position according to the length of the pipe, and then the first conical head and the second conical head are inserted from the two ends of the pipe to clamp and fix the pipe. When the pipe is immersed in the coupling liquid for scanning and inspection, the first drive device is started, and with the cooperation of the driven device, the first conical head and the second conical head are rotated. The clamping friction between the side surfaces of the first conical head and the second conical head and the inner wall of the pipe drives the pipe to rotate along its axis, so that the probe can scan the outer wall of the pipe at a certain inspection interval.

[0022] In practical applications, the first conical plug and the second conical plug of different sizes can be replaced according to pipes of different diameters to improve the applicability of the equipment.

[0023] In a specific solution, the first driving device is driven by a servo motor, and the first conical plug can be directly mounted on the output shaft of the servo motor, or connected to the output shaft of the servo motor through a rotating shaft and a synchronous belt. The driven device can be a driven roller, and the second conical plug can be directly mounted on the roller shaft of the driven roller.

[0024] As a further preferred embodiment of the present invention, a plurality of detachable wear-resistant strips are provided on the side surfaces of the first conical plug and the second conical plug along the generatrix direction thereof. The wear-resistant strips are in contact with the inner wall of the pipe, thereby increasing the clamping friction between the first conical plug and the second conical plug and the inner wall of the pipe, reducing the wear of the first conical plug and the second conical plug during the rotation process, and increasing the service life of the first conical plug and the second conical plug.

[0025] As a further preferred embodiment of the present invention, the translation drive mechanism includes a translation guide rail, a translation seat, a translation drive motor, a translation rack and a translation drive gear; the translation guide rail and the translation rack are arranged horizontally and parallel, and the translation seat can be movably mounted on the translation guide rail; the translation drive gear can be rotatably mounted on the translation seat, and the translation drive gear is connected to the output shaft of the translation drive motor, and the translation drive gear is meshed with the translation rack. The translation drive motor drives the translation drive gear to rotate, so that the entire translation seat is translated along the translation guide rail under the meshing action of the translation drive gear and the translation rack, so that the distance between the second conical head and the first conical head is adapted to the pipe to be scanned.

[0026] As a preferred embodiment of the present invention, in step (2), adjusting the relative position between the probe of the scanning mechanism and the pipe includes adjusting the relative horizontal position, relative front-back position, and relative height position between the probe and the pipe.

[0027] As a further preferred embodiment of the present invention, the scanning mechanism comprises a scanning translation adjustment mechanism, a scanning front-back adjustment mechanism, a scanning lifting adjustment mechanism, and the probe; the scanning translation adjustment mechanism is arranged on one side of the immersion tank, the scanning front-back adjustment mechanism is installed on the adjustment end of the scanning translation adjustment mechanism, the scanning lifting adjustment mechanism is installed on the adjustment end of the scanning front-back adjustment mechanism, and the probe is installed on the adjustment end of the scanning lifting adjustment mechanism; in the step (2), the relative horizontal position between the probe and the pipe is first adjusted by the scanning translation adjustment mechanism to determine the detection interval, and then the relative front-back position between the probe and the pipe is adjusted by the scanning front-back adjustment mechanism, and then the relative height position between the probe and the pipe is adjusted by the scanning lifting adjustment mechanism.

[0028] Usually, after adjusting the relative horizontal position, relative front and rear position, and relative height position between the probe and the pipe, the position of the probe is no longer adjusted during the circumferential scanning and inspection operation of a certain inspection interval of the pipe. In a specific scheme, the scanning translation adjustment mechanism, the scanning front and rear adjustment mechanism, and the scanning lifting and lowering adjustment mechanism can be adjusted by appropriate motorized or manual methods according to the accuracy requirements. For example, in a specific scheme, the scanning translation adjustment mechanism can be adjusted by a synchronous belt, and the scanning front and rear adjustment mechanism is installed on the scanning translation seat, and translated along the length direction of the pipe under the drive of the synchronous belt; the scanning front and rear adjustment mechanism can use a motor to drive the nut to drive the screw to rotate, so that the scanning front and rear adjustment seat moves forward and backward; the scanning lifting and lowering adjustment mechanism can be adjusted manually, by manually rotating the screw to cooperate with the screw hole on the scanning front and rear adjustment seat, so that the scanning lifting seat is lifted and lowered.

[0029] As a further preferred embodiment of the present invention, in step (2), when adjusting the relative position between the probe of the scanning mechanism and the pipe, the relative front-to-back distance between the probe and the pipe is detected in real time, and the adjustment is stopped when it exceeds the set value. In order to avoid the probe from being too close to the pipe, when adjusting the relative front-to-back position between the probe of the scanning mechanism and the pipe, a set value is set in advance as a safe adjustment range, and the adjustment is stopped when it exceeds the set value. Usually, a proximity switch can be set at the equivalent position of the probe. When the proximity switch is closed, it is regarded that the relative front-to-back position between the probe of the scanning mechanism and the pipe exceeds the set value.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The present invention is based on the scanning method of the immersion non-contact pipe scanning equipment. The turning mechanism drives the clamping and rotating mechanism to turn upward or downward. When turning downward, the lower half of the pipe is immersed in the liquid medium of the immersion tank. During the scanning and detection process, the clamping and rotating mechanism drives the pipe to rotate around its axis. During the rotation process, the probe performs non-contact scanning and detection operations on the current detection interval of the pipe. During the scanning and detection process, the probe and the pipe are not in contact, and the liquid medium in the immersion tank is used as the sound wave propagation medium of the probe, thereby improving the detection quality and detection accuracy of the pipe. At the same time, within the specification range of the equipment, non-contact scanning and detection operations can be performed on pipes of any length but different diameters that meet the requirements of the equipment, especially special-shaped pipes with diameter changes along the length direction, thereby improving the applicability of non-contact scanning and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an immersion non-contact pipe scanning device in a preferred embodiment of the present invention;

[0033] Figure 2It is a structural schematic diagram of another perspective of the immersion non-contact pipe scanning device in a preferred embodiment of the present invention;

[0034] Figure 3 for Figure 1 Top view

[0035] Figure 4 for Figures 1 to 3 A schematic diagram of the structure of the scanning front and rear adjustment mechanism and the scanning lifting and lowering adjustment mechanism of the middle scanning mechanism;

[0036] Among them, each mark is: 1-immersion tank, 2-turning mechanism, 3-clamping and rotating mechanism, 4-scanning mechanism; 21-fixed seat, 22-turning motor, 23-turning transmission pinion, 24-turning transmission gear, 25-turning shaft, 26-turning seat; 31-first clamping and rotating assembly, 311-first driving device, 3111-first clamping seat, 3112-first driving motor, 3113-first driving driving wheel, 3114-first driving driven wheel, 3115-first driving synchronous belt, 3116-first rotating shaft, 312-first conical head, 32-second clamping and rotating assembly, 321-translation driving mechanism, 3211-translation guide rail, 3212-translation seat, 3213-translation driving motor, 3214-translation Shift rack, 322-driven device, 3221-second clamping seat, 3222-driven roller, 323-second conical head, 33-wear-resistant strip; 41-scanning translation adjustment mechanism, 411-scanning fixed seat, 412-scanning translation guide rail, 413-scanning translation seat, 414-scanning translation drive motor, 415-scanning translation drive synchronous belt, 42-scanning front and rear adjustment mechanism, 421-front and rear fixed seat, 422-scanning front and rear adjustment motor, 423-scanning front and rear adjustment seat, 424-front and rear translation guide rod, 425-front and rear adjustment screw rod, 43-scanning lifting adjustment mechanism, 431-scanning lifting seat, 432-lifting connecting seat, 433-scanning lifting guide rod, 434-adjusting screw, 44-probe, 45 proximity switch. DETAILED DESCRIPTION

[0037] The following is a further description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0038] In this embodiment, a specific implementation of an immersion non-contact pipe scanning device applied to the scanning method of the preferred embodiment of the present invention is provided.

[0039] like Figures 1 to 3As shown, the immersion non-contact pipe scanning device includes an immersion tank 1, a turning mechanism 2, a clamping and rotating mechanism 3 and a scanning mechanism 4. In the actual scanning and testing operation, the immersion tank 1 is filled with a liquid medium, and the liquid medium in the immersion tank 1 serves as the sound wave propagation medium of the probe 44 during the entire scanning and testing operation. Different liquid media can be injected according to the needs of the scanning and testing operation. In the absence of special requirements, water is generally used as the scanning and testing medium to reduce the scanning and testing cost.

[0040] The flipping mechanism 2 is used to drive the clamping and rotating mechanism 3 to flip upward or downward, so that the clamping and rotating mechanism 3 clamps the entire pipe and flips it down to immerse it in the liquid medium of the immersion tank 1 or leaves the immersion tank 1; when the pipe is immersed in the liquid medium, the flipping mechanism 2 stops moving; when the pipe completes all scanning and inspection operations, the flipping mechanism 2 is reset to flip the entire pipe up and leave the immersion tank 1; on the other hand, when the scanning and inspection operations are completed, the flipping mechanism 2 drives the clamping and rotating mechanism 3 to flip upward and leave the immersion tank 1, which helps to reduce the immersion corrosion maintenance of the equipment and facilitates the loading and unloading of the pipes to be inspected.

[0041] In this embodiment, the flip mechanism 2 can be driven by a servo motor to rotate the flip shaft 25. Specifically, Figures 1 to 3 As shown, the flip mechanism 2 includes a fixed seat 21, a flip motor 22, a flip transmission pinion 23, a flip transmission gear 24, a flip shaft 25 and a flip seat 26. Both ends of the flip shaft 25 are rotatably mounted on the fixed seat 21. The flip shaft 25 is located above the immersion tank 1. The flip seat 26 is fixedly mounted on the flip shaft 25 and rotates with the flip seat 26. One end of the flip shaft 25 is transmission-connected with the flip transmission gear 24. The flip motor 22 is arranged on the fixed seat 21. The output shaft of the flip motor 22 is transmission-connected with the flip transmission pinion 23. The flip transmission pinion 23 is meshed with the flip transmission gear 24. When in action, the flip motor 22 drives the flip transmission pinion 23 to rotate, and the meshing of the flip transmission pinion 23 and the flip transmission gear 24 drives the flip transmission gear 24 to rotate, thereby driving the flip shaft 25 to rotate, thereby driving the flip seat 26 to flip up or down.

[0042] The clamping and rotating mechanism 3 is used to clamp the pipe and can drive the pipe to rotate along its axial direction. Figures 1 to 3As shown, the clamping and rotating mechanism 3 includes a first clamping and rotating assembly 31 and a second clamping and rotating assembly 32: the first clamping and rotating assembly 31 includes a first driving device 311 and a first conical top 312, the first driving device 311 is fixedly mounted on the flip seat 26, and the first conical top 312 is mounted on the power output end of the first driving device 311; the second clamping and rotating assembly 32 includes a translation driving mechanism 321, a driven device 322 and a second conical top 323, the translation driving mechanism 321 is arranged on the flip seat 26, the driven device 322 is mounted on the power output end of the translation driving mechanism 321, and the second conical top 323 is mounted on the linkage end of the driven device 322; the cone of the first conical top 312 is opposite to the cone of the second conical top 323, and the axis of the first conical top 312 and the axis of the cone of the second conical top 323 are on the same horizontal line. In practical applications, the first conical plug 312 and the second conical plug 323 of different sizes can be replaced according to pipes of different diameters to improve the applicability of the device.

[0043] In this embodiment, the first driving device 311 is driven by a servo motor, and cooperates with a rotating shaft and a synchronous belt to drive the first conical head 312 to rotate. Specifically, Figures 1 to 3 As shown, the first driving device 311 includes a first clamping seat 3111, a first driving motor 3112, a first driving active wheel 3113, a first driving driven wheel 3114, a first driving synchronous belt 3115 and a first rotating shaft 3116. The first clamping seat 3111 and the first driving motor 3112 are arranged on the flip seat 26. The first driving active wheel 3113 is transmission-mounted on the output shaft of the first driving motor 3112. The first driving driven wheel 3114 is rotatably arranged on the first clamping seat 3111. The first driving active wheel 3113 and the first driving driven wheel 3114 tension the first driving synchronous belt 3115 accordingly. The first rotating shaft 3116 is rotatably arranged on the first clamping seat 3111. One end of the first rotating shaft 3116 is transmission-connected to the first driving driven wheel 3114, and the first conical head 312 is mounted on the other end of the first rotating shaft 3116.

[0044] In this embodiment, the translation drive mechanism 321 adopts a method in which the gear rotates and meshes on the rack to drive the translation seat 3212 to move, and the driven device 322 adopts a method in which the second conical head 323 is directly installed. Specifically: Figures 1 to 3As shown, the translation drive mechanism 321 includes a translation guide rail 3211 (two are provided in this embodiment), a translation seat 3212, a translation drive motor 3213, a translation rack 3214, and a translation drive gear (blocked by the translation seat 3212 and not marked in the figure), the translation guide rail 3211 and the translation rack 3214 are arranged horizontally and parallel, the translation seat 3212 is movably mounted on the translation guide rail 3211, and the translation drive gear is rotatably mounted on the translation seat 3212. 212, the translation driving gear is connected to the output shaft of the translation driving motor 3213, and the translation driving gear is meshed with the translation rack 3214; the driven device 322 includes a second clamping seat 3221 and a driven roller 3222, the second clamping seat 3221 is fixedly mounted on the translation seat 3212, the driven roller 3222 is rotatably mounted on the second clamping seat 3221, and the second conical head 323 is mounted on the roller shaft of the driven roller 3222.

[0045] The translation drive mechanism 321 first translates the second conical head 323 to the corresponding position according to the length of the pipe. Specifically, the translation drive motor 3213 drives the translation drive gear to rotate, so that the entire translation seat 3212 translates along the translation guide rail 3211 under the meshing action of the translation drive gear and the translation rack 3214, so that the distance between the second conical head 323 and the first conical head 312 is adapted to the pipe to be scanned, and then the first conical head 312 and the second conical head 323 are inserted from the two end pipe openings of the pipe, so as to clamp and fix the pipe.

[0046] like Figures 1 to 3 As shown, a plurality of detachable wear-resistant strips 33 are provided on the side surfaces of the first conical plug 312 and the second conical plug 323 along the generatrix direction thereof. The wear-resistant strips 33 are in contact with the inner wall of the pipe material, thereby increasing the clamping friction between the first conical plug 312 and the second conical plug 323 and the inner wall of the pipe material, reducing the wear of the first conical plug 312 and the second conical plug 323 during the rotation process, and increasing the service life of the first conical plug 312 and the second conical plug 323.

[0047] like Figures 1 to 4As shown, the scanning mechanism 4 is used for performing contactless scanning and detection operations on the pipe. The scanning mechanism 4 is provided with an adjustable probe 44. The scanning mechanism 4 is arranged on one side of the flip mechanism 2. The scanning mechanism 4 includes a scanning translation adjustment mechanism 41, a scanning front-back adjustment mechanism 42, a scanning lifting adjustment mechanism 43, a probe 44 and a proximity switch 45. The scanning translation adjustment mechanism 41 is used to adjust the relative horizontal position between the probe 44 and the pipe to determine the current detection interval. The scanning front-back adjustment mechanism 42 is used to adjust the relative front-back position between the probe 44 and the pipe. The scanning lifting adjustment mechanism 43 is used to adjust the relative height position between the probe 44 and the pipe. The scanning translation adjustment mechanism 41, the scanning front-to-back adjustment mechanism 42, and the scanning lifting adjustment mechanism 43 can be adjusted by suitable motorized or manual methods according to the accuracy requirements. In this embodiment, the scanning translation adjustment mechanism 41 can be adjusted by a synchronous belt, and the scanning front-to-back adjustment mechanism 42 is installed on the scanning translation seat 413, and translated along the length direction of the pipe under the drive of the synchronous belt; the scanning front-to-back adjustment mechanism 42 can use a motor to drive the nut to drive the screw to rotate, so that the scanning front-to-back adjustment seat 423 moves forward and backward; the scanning lifting adjustment mechanism 43 can be adjusted manually, by manually rotating the screw rod and cooperating with the screw hole on the scanning front-to-back adjustment seat 423, so that the scanning lifting seat 431 is lifted and lowered.

[0048] Specifically, Figures 1 to 3 As shown, the scanning translation adjustment mechanism 41 includes a scanning fixed seat 411, a scanning translation guide rail 412, a scanning translation seat 413, a scanning translation drive motor 414 and a scanning translation drive synchronous belt 415; the scanning fixed seat 411 is arranged at one side of the immersion tank 1, the scanning translation guide rail 412 is horizontally arranged on the scanning fixed seat 411, the scanning translation drive motor 414, the scanning translation drive synchronous belt 415 and the scanning translation guide rail 412 are all arranged on the scanning fixed seat 411, and the scanning translation seat 413 is movably mounted on the scanning translation guide rail 412 and connected to the scanning translation drive synchronous belt 415. During adjustment, the scanning translation drive motor 414 drives the scanning translation drive synchronous belt 415 to move, driving the scanning translation seat 413 to translate along the scanning translation guide rail 412.

[0049] Specifically, Figure 4As shown, the scanning front and back adjustment mechanism 42 includes a front and back fixed seat 421, a scanning front and back adjustment motor 422, a scanning front and back adjustment seat 423, a front and back translation guide rod 424 (two in the figure) and a front and back adjustment screw rod 425; the front and back fixed seat 421 is arranged on the scanning translation seat 413, and the front and back fixed seat 421 is provided with a guide hole (blocked and not marked in the figure) along the front and back direction that matches the front and back translation guide rod 424, the front and back translation guide rod 424 passes through the corresponding guide hole along the front and back direction, and the scanning front and back adjustment seat 423 is connected to the front end of the front and back translation guide rod 424; the scanning front and back adjustment motor 422 is installed on the front and back fixed seat 421, the front and back adjustment screw rod 425 is arranged along the front and back direction and is connected to the output shaft of the scanning front and back adjustment motor 422 through a nut (not drawn in the figure), and the front end of the front and back adjustment screw rod 425 is rotatably connected and cooperated with the scanning front and back adjustment seat 423. During adjustment, the scanning front and rear adjustment motor 422 drives the front and rear adjustment screw rod 425 to translate forward and backward, driving the scanning front and rear adjustment seat 423 to move forward and backward under the guidance of the front and rear translation guide rod 424 and the guide hole.

[0050] Specifically, Figure 4 As shown, the scanning lifting adjustment mechanism 43 includes a scanning lifting seat 431, a lifting connection seat 432, a scanning lifting guide rod 433 and an adjusting screw 434; the scanning front and rear adjustment seat 423 is provided with a vertical screw hole and a guide hole (blocked and not marked in the figure), the scanning lifting guide rod 433 is in the corresponding guide hole, the lifting connection seat 432 is installed on the upper end of the scanning lifting guide rod 433, the scanning lifting seat 431 is installed on the lower end of the scanning lifting guide rod 433, and the probe 44 and the proximity switch 45 are arranged on the scanning lifting seat 431; the lifting connection seat 432 is provided with a through hole (blocked and not marked in the figure) opposite to the screw hole up and down, the adjusting screw 434 passes through the opposite through hole and screw hole from top to bottom, and the threaded section of the adjusting screw 434 is threadedly connected with the screw hole. During adjustment, the manual adjustment screw rod 434 cooperates with the screw hole on the scanning front and rear adjustment seat 423, so that the scanning lifting seat 431 is lifted and lowered under the guidance of the scanning lifting guide rod 433 and the corresponding guide hole.

[0051] In order to prevent the probe 44 from getting too close to the pipe, Figure 4 As shown, a proximity switch 45 is provided on the scanning lifting seat 431. When adjusting the relative front-to-back position between the probe 44 of the scanning mechanism 4 and the pipe, a set value is set in advance as a safe adjustment range. When the set value is exceeded, the proximity switch 45 is closed, and it is regarded that the relative front-to-back distance between the current probe 44 and the pipe exceeds the set value, and the adjustment is stopped at this time.

[0052] Based on the immersion non-contact pipe scanning device provided in this embodiment, the corresponding scanning method includes the following steps:

[0053] (1) The translation drive mechanism 321 first translates the second conical plug 323 to a corresponding position according to the length of the pipe, and then feeds the pipe so that the first conical plug 312 is inserted from one end of the pipe; then, the translation drive mechanism 321 drives the second conical plug 323 so that the second conical plug 323 is inserted from the other end of the pipe, so that the first conical plug 312 and the second conical plug 323 clamp and fix the pipe from both ends, and the pipe is placed horizontally above the immersion tank 1;

[0054] (2) adjusting the relative position between the probe 44 of the scanning mechanism 4 and the pipe, including adjusting the relative horizontal position, relative front and rear position, and relative height position between the probe 44 and the pipe, first adjusting the relative horizontal position between the probe 44 and the pipe by the scanning translation adjustment mechanism 41 to determine the detection interval, then adjusting the relative front and rear position between the probe 44 and the pipe by the scanning front and rear adjustment mechanism 42, and then adjusting the relative height position between the probe 44 and the pipe by the scanning lifting adjustment mechanism 43; when adjusting the relative front and rear position between the probe 44 of the scanning mechanism 4 and the pipe, the relative front and rear distance between the probe 44 and the pipe is detected in real time, and the adjustment is stopped when it exceeds the set value; when the adjustment is completed, the probe 44 is immersed in the liquid medium of the immersion tank 1;

[0055] (3) Start the turning mechanism 2, driving the clamping and rotating mechanism 3 to turn downward, and the turning mechanism 2 stops moving when the lower half of the tube is immersed in the liquid medium in the immersion tank 1;

[0056] (4) The first driving device 311 is started, and the first conical plug 312 and the second conical plug 323 are rotated under the linkage of the driven roller 3222. The clamping friction between the side surfaces of the first conical plug 312 and the second conical plug 323 and the inner wall of the pipe drives the pipe to rotate along its axis. During the rotation, the probe 44 performs a non-contact scanning and inspection operation on the outer wall of the pipe in the circumferential direction of the current inspection interval. The inspection interval is the inspection distance that can be covered by the probe 44. During the scanning and inspection operation of the current inspection interval, the position of the probe 44 is no longer adjusted, and the relative position of the probe 44 and the pipe remains unchanged to ensure the consistency and stability of the scanning results.

[0057] (5) After scanning and inspecting the current inspection section of the pipe, the scanning translation adjustment mechanism 41 is used to adjust the probe 44 to move along the length direction of the pipe to the next inspection section, and a non-contact scanning and inspection operation is performed on the circumference of the next inspection section;

[0058] (6) Repeat steps (4) and (5) until the probe 44 completes the non-contact scanning and inspection operation in all inspection intervals of the pipe;

[0059] (7) After completing the scanning and inspection of the entire pipe section, the flipping mechanism 2 is started again to drive the clamping and rotating mechanism 3 to flip upward, so that the pipe leaves the liquid medium in the immersion tank 1.

[0060] The scanning method based on the immersion non-contact pipe scanning equipment of the present invention utilizes the flipping mechanism 2 to drive the clamping and rotating mechanism 3 to flip upward or downward. When flipping downward, the lower half of the pipe is immersed in the liquid medium of the immersion tank 1. During the scanning and detection process, the pipe is driven to rotate around its axis by the clamping and rotating mechanism 3. During the rotation process, the probe 44 performs a non-contact scanning and detection operation on the current detection interval of the pipe. During the scanning and detection process, the probe 44 has no contact with the pipe, and the liquid medium in the immersion tank 1 is used as the sound wave propagation medium of the probe 44, thereby improving the detection quality and detection accuracy of the pipe; at the same time, within the specification range of the equipment, it can perform non-contact scanning and detection operations on pipes of any length but different diameters that meet the requirements of the equipment, especially special-shaped pipes with diameter changes along the length direction, thereby improving the applicability of non-contact scanning and detection.

[0061] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A scanning method based on an immersion non-contact pipe scanning device, characterized in that: The immersion non-contact pipe scanning device comprises an immersion tank, a turning mechanism, a clamping and rotating mechanism and a scanning mechanism; the turning mechanism is arranged above the immersion tank, the clamping and rotating mechanism is installed on the turning mechanism, and the turning mechanism can drive the clamping and rotating mechanism to turn upward or downward; the scanning mechanism is arranged on one side of the turning mechanism, and the scanning mechanism comprises an adjustable probe; The scanning operation includes the following steps: (1) The clamping and rotating mechanism fixes the pipe so that the pipe is placed horizontally above the immersion tank; (2) Adjust the relative position between the probe of the scanning mechanism and the pipe, and immerse the probe in the liquid medium of the immersion tank; (3) Start the flipping mechanism to drive the clamping and rotating mechanism to flip downward, and the flipping mechanism stops moving when the lower half of the tube is immersed in the liquid medium in the immersion tank; (4) The clamping and rotating mechanism drives the pipe to rotate around its axis. During the rotation process, the probe performs non-contact scanning and testing on the pipe in the circumference of the current detection interval. The detection interval is the detection distance that the probe can cover. During the scanning and testing process of the current detection interval, the relative position of the probe and the pipe remains unchanged; (5) After scanning and inspecting the current inspection section of the pipe, adjust the probe to move along the length direction of the pipe to the next inspection section, and perform non-contact scanning and inspection operations on the circumference of the next inspection section; (6) Repeat steps (4) and (5) until the probe completes non-contact scanning and inspection operations in all inspection areas of the pipe; (7) After completing the scanning and inspection of the entire section of the pipe, the flipping mechanism is started again to drive the clamping and rotating mechanism to flip upward, so that the pipe leaves the liquid medium in the immersion tank.

2. The scanning method based on the immersion non-contact pipe scanning device according to claim 1 is characterized in that: The clamping and rotating mechanism comprises a first clamping and rotating assembly and a second clamping and rotating assembly, wherein the first clamping and rotating assembly is fixedly arranged at the power output end of the flipping mechanism, and the second clamping and rotating assembly is movably arranged at the power output end of the flipping mechanism; in the step (1), when the clamping and rotating mechanism clamps and fixes the pipe, the second clamping and rotating assembly first translates to a corresponding position according to the length of the pipe, and then the first clamping and rotating assembly and the second clamping and rotating assembly clamp the pipe from both ends.

3. The scanning method based on the immersion non-contact pipe scanning device according to claim 2 is characterized in that: The first clamping and rotating assembly includes a first driving device and a first conical top, the first driving device is fixedly mounted on the power output end of the flipping mechanism, and the first conical top is mounted on the power output end of the first driving device; the second clamping and rotating assembly includes a translation driving mechanism, a driven device and a second conical top, the translation driving mechanism is arranged on the power output end of the flipping mechanism, the driven device is mounted on the power output end of the translation driving mechanism, and the second conical top is mounted on the linkage end of the driven device; the cone portion of the first conical top is opposite to the cone portion of the second conical top, and the axis of the first conical top and the axis of the cone portion of the second conical top are on the same horizontal line.

4. The scanning method based on the immersion non-contact pipe scanning device according to claim 3 is characterized in that: A plurality of detachable wear-resistant strips are arranged on the side surfaces of the first conical top and the second conical top along the generatrix direction thereof.

5. The scanning method based on the immersion non-contact pipe scanning device according to claim 3 is characterized in that: The translation drive mechanism includes a translation guide rail, a translation seat, a translation drive motor, a translation rack and a translation drive gear; the translation guide rail and the translation rack are arranged horizontally and parallel, and the translation seat can be movably installed on the translation guide rail; the translation drive gear can be rotatably installed on the translation seat, the translation drive gear is drivingly connected to the output shaft of the translation drive motor, and the translation drive gear is meshed with the translation rack.

6. The scanning method based on the immersion non-contact pipe scanning device according to any one of claims 1 to 5, characterized in that: In the step (2), adjusting the relative position between the probe of the scanning mechanism and the pipe includes adjusting the relative horizontal position, relative front-back position, and relative height position between the probe and the pipe.

7. The scanning method based on the immersion non-contact pipe scanning device according to claim 6 is characterized in that: The scanning mechanism comprises a scanning translation adjustment mechanism, a scanning front-to-back adjustment mechanism, a scanning lifting adjustment mechanism, and the probe; the scanning translation adjustment mechanism is arranged on the immersion tank, the scanning front-to-back adjustment mechanism is installed on the adjustment end of the scanning translation adjustment mechanism, the scanning lifting adjustment mechanism is installed on the adjustment end of the scanning front-to-back adjustment mechanism, and the probe is installed on the adjustment end of the scanning lifting adjustment mechanism; in the step (2), the relative horizontal position between the probe and the pipe is first adjusted by the scanning translation adjustment mechanism to determine the detection interval, and then the relative front-to-back position between the probe and the pipe is adjusted by the scanning front-to-back adjustment mechanism, and then the relative height position between the probe and the pipe is adjusted by the scanning lifting adjustment mechanism.

8. The scanning method based on the immersion non-contact pipe scanning device according to claim 6 is characterized in that: In the step (2), when adjusting the relative position between the probe of the scanning mechanism and the pipe, the relative front-to-back distance between the probe and the pipe is detected in real time, and the adjustment is stopped when it exceeds the set value.

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