Multi-station rotary lifting device for weld inspection

Abstract

The utility model discloses a kind of multi-station rotary lifting devices for weld flaw detection, including the workbench of through-hole, the electric lift of being set below table top and the supporting plate passing through through-hole, supporting plate is used to carry flaw detector;Several sliding assemblies are distributed along annular equiangular angle on table top, radially adjustable rotary table is equipped on each sliding assembly, rotary table is made of bearing support, bearing sleeve and the inner disc supported by bearing, outer disc is detachably set in inner disc and is used to place workpiece.Lift preferably worm gear screw structure, cooperate double telescopic rod with oilless bushing guide, realize the stable lifting of flaw detector;Sliding assembly preferably dovetail groove guide rail and is equipped with limit. The device realizes flaw detector height adjustable, workpiece rotation angle adjustable, station radial adjustable and multi-station parallel flaw detection, structure is stable, operation is efficient, and application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of flaw detection equipment technology, specifically to a multi-station rotary lifting device for weld flaw detection. Background Technology

[0002] Weld inspection is a crucial quality control step in industrial production, used to detect internal and surface defects in welded joints, such as cracks, porosity, slag inclusions, and lack of fusion. Common inspection methods include ultrasonic testing, radiographic testing, magnetic particle testing, and penetrant testing. In actual production, the types and sizes of workpieces to be inspected are diverse, including pipe flanges, pressure vessel joints, and steel structure welds. These workpieces often require comprehensive inspection from multiple angles to ensure that the weld quality meets standard requirements.

[0003] Traditional weld flaw detection operations typically employ a single-station manual operation method, allowing only one workpiece to be inspected at a time. After inspection, the next workpiece must be manually moved, resulting in long workpiece changeover times, low equipment utilization, and an inability to meet the demands of mass production. Furthermore, many workpieces to be inspected are quite heavy, making manual handling not only labor-intensive but also posing safety hazards and increasing the risk of workplace injuries, severely hindering the efficiency of flaw detection operations.

[0004] Therefore, there is an urgent need for a weld flaw detection device that can achieve simultaneous operation at multiple workstations, precise positioning and adjustment, and rapid adaptation to workpieces of different sizes. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-station rotary lifting device for weld flaw detection, so as to solve the problems of low efficiency, high labor intensity, insufficient adaptability and difficulty in workpiece adjustment in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-station rotary lifting device for weld flaw detection includes a workbench with a horizontal tabletop at the top. The workbench is characterized by having a through hole at the center of the tabletop, an electric lift below the workbench, and a support plate at the top of the electric lift. The support plate is driven by the electric lift to move up and down through the through hole.

[0008] The workbench is also provided with multiple rotating platforms, which are arranged in a ring at equal angles around the through hole. Each rotating platform is slidably connected to the workbench via a sliding assembly. The sliding direction of the sliding assembly is along the radial direction of the through hole. The sliding assembly includes a guide rail fixed to the workbench surface and a slider that slides with the guide rail. The rotating platform is fixed on the slider, and each rotating platform includes a rotatable rotating disk.

[0009] Preferably, the rotary table further includes a bearing support, which is fixed on the slider, and the rotary disk is rotatably mounted on the bearing support via a bearing and a bearing sleeve.

[0010] Preferably, the electric lifting platform includes a base plate, a worm gear screw jack, and a motor. The base plate is fixed to the ground, the worm gear screw jack is mounted on the base plate via a connecting seat, the motor is connected to the input end of the worm gear screw jack, and the support plate is connected to the output end of the worm gear screw jack.

[0011] Preferably, the electric lift further includes a guide assembly, which includes a telescopic rod and a sleeve seat. The upper end of the telescopic rod is fixedly connected to the support plate, the sleeve seat is fixed to the base plate, and the lower end of the telescopic rod is inserted into the sleeve seat and slides in cooperation with the sleeve seat.

[0012] Preferably, there are two telescopic rods, which are symmetrically distributed about the center of the support plate and fixedly connected to the support plate respectively. The inner wall of the sleeve seat is provided with an oil-free bushing, and the telescopic rod slides with the sleeve seat through the oil-free bushing.

[0013] Preferably, the guide rail is a dovetail groove guide rail, the slider is a dovetail groove slider, and limit blocks are provided at both ends of the guide rail, the limit blocks being used to limit the sliding stroke of the slider.

[0014] Preferably, the rotary disk includes an inner disk and an outer disk. A positioning boss is provided at the center of the upper side of the inner disk, and a positioning hole is provided on the outer disk to cooperate with the positioning boss. The outer disk is detachably sleeved on the inner disk, and different sizes of outer disks can be replaced to accommodate workpieces of different sizes.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting up multiple rotating platforms arranged in a circular, equidistant manner, multiple workpieces can be placed simultaneously for flaw detection, enabling multi-station parallel operation and significantly improving flaw detection efficiency. Compared with traditional single-station operation, equipment utilization is significantly improved, meeting the needs of mass production. Simultaneously, the use of an electric lifting platform to drive the pallet lifting eliminates the need for operators to frequently manually move heavy workpieces and adjust equipment, greatly reducing labor intensity, improving operational safety, and minimizing the risk of work-related injuries.

[0017] 2. The rotary table allows for 360° continuous rotation or angular positioning of the workpiece, while the sliding assembly enables radial position adjustment. The flaw detector's height is adjusted via a lifting mechanism. The cooperation between the dovetail guide rail and the slider, along with the setting of limit blocks, ensures the accuracy and repeatability of radial adjustment. The self-locking performance of the worm gear screw jack guarantees the stability and precision of height adjustment. This allows the flaw detector to accurately align with the weld position of the workpiece, ensuring that process parameters such as the flaw detection angle and coupling distance meet standard requirements, significantly improving flaw detection quality and reliability.

[0018] 3. By designing a combined structure of inner and outer discs, the device can quickly adapt to workpieces with different outer diameters, avoiding the cumbersome operation of frequently changing tooling fixtures in traditional methods, and greatly improving changeover efficiency. The overall structure of the device is rationally designed, with clear functions and coordinated cooperation among the worktable, sliding components, rotary table, and electric lift. The double telescopic rod guide assembly, combined with oil-free bushings, ensures the stability and smoothness of the lifting process, preventing the pallet from swaying or tilting during lifting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the rotary table of this utility model.

[0021] Figure 3 This is a schematic diagram of the electric lifting platform of this utility model;

[0022] Figure 4 This is a structural diagram of the present invention in its working state.

[0023] Explanation of the labels in the diagram:

[0024] Workbench 1, Tabletop 1-1, Through Hole 1-2, Guide Rail 2, Slider 2-1, Limit Block 2-2, Rotary Table 3, Bearing Sleeve 3-1, Bearing 3-2, Inner Plate 3-3, Outer Plate 3-4, Bearing Support 3-5, Positioning Boss 3-31, Electric Lifting Machine 4, Base Plate 4-1, Worm Gear Screw Lifting Machine 4-2, Motor 4-3, Support Plate 4-4, Connecting Seat 4-5, Telescopic Rod 4-6, Sleeve Seat 4-7, Workpiece 5, Flaw Detector 6. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 4 As shown, the present invention provides a multi-station rotary lifting device for weld flaw detection, including a worktable 1 and an electric lift 4.

[0027] The workbench 1 has a frame structure, welded from shaped steel or steel plates, and possesses sufficient strength and rigidity to withstand the weight of multiple workpieces 5. The top of the workbench 1 has a horizontal table surface 1-1, and a through hole 1-2 is provided at the center of the table surface 1-1. The through hole 1-2 is a circular hole, and its specific size is determined according to the actual size of the pallet 4-4 used, ensuring that the pallet 4-4 can smoothly pass through the through hole 1-2 and move up and down.

[0028] On the worktable 1-1, multiple rotating tables 3 are arranged in a ring at equal angles around the through hole 1-2. In this embodiment, there are 8 rotating tables 3, that is, one rotating table 3 is arranged every 45°. In other embodiments, the number of rotating tables 3 can also be 3, 4, 6 or other numbers, which can be adjusted according to actual needs and the size of the worktable 1. Too few rotating tables 3 will reduce work efficiency, while too many will make the worktable 1-1 too crowded, affecting operation and maintenance.

[0029] Each rotary table 3 is slidably connected to the worktable 1 via a sliding assembly. The sliding assembly includes a guide rail 2 and a slider 2-1. The guide rail 2 is fixed to the table surface 1-1 of the worktable 1, and the guide rail 2 extends radially along the through hole 1-2, that is, it extends outward from the edge of the through hole 1-2. The guide rail 2 is preferably a dovetail groove guide rail, and the guide rail 2 is fixed to the table surface 1-1 by bolts.

[0030] The slider 2-1 slides on the guide rail 2. Preferably, the slider 2-1 is a dovetail slider, forming a mating pair with the dovetail guide rail 2. The slider 2-1 can be slidable manually. The operator pushes the slider 2-1 along the guide rail 2 according to the size of the workpiece 5 and the requirements of the flaw detection position, adjusting the distance between the rotary table 3 and the center of the through hole 1-2 to accommodate the flaw detection needs of different workpieces 5. In some embodiments, a servo motor or stepper motor can be configured on the sliding assembly to drive the ball screw, achieving automatic adjustment of the slider 2-1's position.

[0031] Limiting blocks 2-2 are provided at both ends of the guide rail 2. The limiting blocks 2-2 are metal blocks and are fixed to the ends of the guide rail 2 by bolts or welding. The function of the limiting blocks 2-2 is to limit the sliding stroke of the slider 2-1 and prevent the slider 2-1 from sliding excessively and dislodging from the guide rail 2.

[0032] The rotary table 3 is fixed on the slider 2-1. The rotary table 3 includes a bearing support 3-5 and a rotating disk. The bearing support 3-5 is a vertical support, and its bottom is fixedly connected to the slider 2-1 by bolts. The upper part of the bearing support 3-5 is provided with a bearing mounting hole, in which a bearing 3-2 and a bearing sleeve 3-1 are installed.

[0033] Bearing 3-2 is preferably a deep groove ball bearing or an angular contact ball bearing. The outer ring of bearing 3-2 is interference-fitted or clearance-fitted with the bearing mounting hole of bearing support 3-5. It is fixed in bearing support 3-5 by end cover or bearing cover to prevent axial movement of bearing 3-2.

[0034] Bearing sleeve 3-1 is a cylindrical part, with its outer surface tightly fitted to the inner ring of bearing 3-2, typically using an interference fit or a transition fit. The inner bore of bearing sleeve 3-1 mates with the lower part of inner disc 3-3. Through bearing sleeve 3-1, inner disc 3-3 is connected to bearing 3-2, allowing inner disc 3-3 to be rotatably mounted relative to bearing support 3-5.

[0035] The inner disk 3-3 is rotatably mounted on the bearing support 3-5 via the bearing sleeve 3-1 and the bearing 3-2. Specifically, the lower part of the inner disk 3-3 has a cylindrical shaft segment or shaft hole that mates with the inner hole of the bearing sleeve 3-1. This shaft segment or shaft hole is inserted into the bearing sleeve 3-1 and fixed to the bearing sleeve 3-1 by a key connection, interference fit, or threaded connection, ensuring that the inner disk 3-3 can drive the bearing sleeve 3-1 to rotate together. The inner disk 3-3 can rotate freely 360° relative to the bearing support 3-5 with the support of the bearing 3-2. The rotation process is smooth and stable, with high concentricity and low frictional resistance.

[0036] The inner disc 3-3 can be rotated manually, with the operator turning it by hand to rotate the workpiece 5 and achieve flaw detection coverage of the weld at different angles. In practical use, an electric drive device can also be configured, such as installing a gear ring on the side of the inner disc 3-3. A servo motor or stepper motor drives the gear to mesh with the gear ring, achieving automatic rotation of the inner disc 3-3, further improving the degree of automation, reducing manual operation, and improving flaw detection accuracy and consistency.

[0037] The rotating disk comprises an inner disk 3-3 and an outer disk 3-4. The inner disk 3-3 is the main body of the rotating disk, with a disc-shaped structure. It is connected to the bearing 3-2 via a bearing sleeve 3-1 and can rotate freely 360° relative to the bearing support 3-5. A positioning boss 3-31 is provided at the center of the upper side of the inner disk 3-3. The positioning boss 3-31 is a cylindrical protrusion, and its outer circular surface is concentric with the upper side of the inner disk 3-3. The outer disk 3-4 has a ring-shaped structure, and its outer diameter is slightly larger than or equal to the outer diameter of the workpiece 5 so that the workpiece 5 can be stably placed on the outer disk 3-4. The inner ring of the outer disk 3-4 is a positioning hole, which can be fitted onto the outer circumference of the positioning boss 3-31 to form a clearance fit or a transition fit. The outer disk 3-4 can be designed in various sizes to accommodate workpieces 5 with different outer diameters. The outer discs 3-4 of different sizes have the same positioning hole diameter and can be used with the same inner disc 3-3. By changing the outer discs 3-4 of different outer diameters, they can be quickly adapted to workpieces 5 of different sizes.

[0038] The electric lifting platform 4 is located below the workbench 1, specifically directly below the through hole 1-2. It is used to drive the support plate 4-4 to move up and down, thereby adjusting the height of the flaw detector 6. The electric lifting platform 4 includes a base plate 4-1, a worm gear screw jack 4-2, a motor 4-3, and a support plate 4-4.

[0039] The base plate 4-1 is fixed to the ground, providing a stable support foundation for the entire electric lifting platform 4 and bearing the weight of the electric lifting platform 4, the support plate 4-4, and the flaw detector 6. The worm gear screw jack 4-2 is mounted on the base plate 4-1 via a connecting seat 4-5. The top of the connecting seat 4-5 has an mounting surface for installing the worm gear screw jack 4-2. The worm gear screw jack 4-2 is a commonly used lifting transmission device, composed of a worm, worm wheel, screw, nut, etc., and features smooth transmission, low noise, high load-bearing capacity, and good self-locking performance. The self-locking performance of the worm gear screw jack 4-2 ensures that the support plate 4-4 remains at any height without descending when the machine is stopped, eliminating the need for additional locking devices and making operation simple and safe.

[0040] Motor 4-3 is connected to the worm input shaft of worm gear screw jack 4-2 via a coupling or reducer. Motor 4-3 is fixedly mounted on the input flange of worm gear screw jack 4-2 or fixed to the base plate 4-1 via a bracket. When motor 4-3 rotates, it drives the worm to rotate. The worm, through worm gear transmission, causes the screw to rotate and, through the nut pair, converts the rotation into linear motion, driving the output end to move up and down, thereby realizing the up and down lifting of the support plate 4-4.

[0041] The support plate 4-4 is connected to the output end of the worm gear screw jack 4-2. The support plate 4-4 is a circular steel plate, slightly smaller than the diameter of the through hole 1-2, allowing it to pass smoothly through the through hole 1-2 while maintaining a certain gap with its edge. The top surface of the support plate 4-4 is a flat working surface used to support the flaw detector 6, such as an ultrasonic probe and its support, a magnetic particle flaw detector, a penetrant spraying device, an eddy current flaw detector probe, or other non-destructive testing equipment. The upper surface of the support plate 4-4 can be provided with threaded holes, positioning holes, T-slots, or other mounting structures for fixing the flaw detector 6. The center of the support plate 4-4 is fixedly connected to the output end of the worm gear screw jack 4-2 via a flange or bolts, ensuring that the support plate 4-4 can move up and down synchronously with the output end of the worm gear screw jack 4-2.

[0042] When motor 4-3 rotates, the worm gear screw jack 4-2 drives the support plate 4-4 to rise or fall. The support plate 4-4 passes through the through hole 1-2 and is positioned above the table 1-1 for height adjustment. The operator can adjust the lifting height of the support plate 4-4 according to the height of the workpiece 5 and the position of the weld, ensuring that the probe of the flaw detector 6 is aligned with the weld position of the workpiece 5, and that the flaw detection angle, coupling distance, or other process parameters meet the flaw detection standard requirements. The self-locking performance of the worm gear screw jack 4-2 allows the support plate 4-4 to maintain its current height after lifting stops, eliminating the need for additional braking or locking devices. This makes operation simple, safe, and reliable.

[0043] To further improve the stability and accuracy of the lifting process of the pallet 4-4 and prevent the pallet 4-4 from swaying, tilting, or rotating during the lifting process, the electric lift 4 also includes a guide assembly. The guide assembly includes a telescopic rod 4-6 and a sleeve seat 4-7.

[0044] The telescopic rod 4-6 is a cylindrical rod. The upper end of the telescopic rod 4-6 is fixedly connected to the support plate 4-4, and the lower end of the telescopic rod 4-6 is a free end that is inserted into the sleeve seat 4-7 and slides in fit with the sleeve seat 4-7.

[0045] The sleeve seat 4-7 is fixed on the base plate 4-1. The sleeve seat 4-7 has a cylindrical structure with a cylindrical cavity inside. The inner diameter is slightly larger than the outer diameter of the telescopic rod 4-6. The bottom of the sleeve seat 4-7 is connected to the base plate 4-1 by bolts through a flange, or is fixed to the base plate 4-1 by welding.

[0046] An oil-free bushing is installed on the inner wall of the sleeve seat 4-7. The oil-free bushing is a self-lubricating bearing material, composed of a metal matrix and embedded solid lubricant, offering advantages such as no need for lubrication, wear resistance, low coefficient of friction, and easy maintenance. The oil-free bushing is press-fitted or embedded in the inner bore of the sleeve seat 4-7, which mates with the outer diameter of the telescopic rod 4-6. The telescopic rod 4-6 slides within the sleeve seat 4-7 via the oil-free bushing. During the up-and-down movement of the support plate 4-4, the telescopic rod 4-6 slides smoothly within the sleeve seat 4-7. The oil-free bushing provides guidance and support, reducing frictional resistance, preventing jamming, misalignment, or abnormal wear of the telescopic rod 4-6, extending its service life, and reducing maintenance costs.

[0047] In this embodiment, the telescopic rods 4-6 are preferably two, and the two telescopic rods 4-6 are symmetrically distributed with the center of the support plate 4-4 as the center of symmetry.

[0048] The working principle and usage of this device are as follows:

[0049] First, the operator selects an outer disk 3-4 of appropriate size based on the dimensions and shape of the workpiece 5 to be inspected. If the size of the outer disk 3-4 currently installed on the rotary table 3 is not suitable and needs to be replaced, the current outer disk 3-4 is removed upwards from the positioning boss 3-31 of the inner disk 3-3. Then, a new outer disk 3-4 matching the size of the workpiece 5 is selected, the positioning hole of the new outer disk 3-4 is aligned with the positioning boss 3-31 of the inner disk 3-3, and it is fitted onto the positioning boss 3-31 from above, pressing down the outer disk 3-4 until the bottom surface of the outer disk 3-4 contacts the upper surface of the inner disk 3-3.

[0050] Then, the operator places the workpiece 5 to be inspected on the rotating disk of the rotary table 3, specifically on the upper surface of the outer disk 3-4, ensuring that the workpiece 5 is concentric with the outer disk 3-4, and that the weld position of the workpiece 5 is easily detectable by the flaw detector 6. This device is equipped with multiple rotary tables 3, which can simultaneously place the workpiece 5 on multiple rotary tables 3, realizing multi-station parallel preparation and improving work efficiency.

[0051] Next, place and secure the flaw detector 6 on the support plate 4-4. The type of flaw detector 6 is determined according to the flaw detection process. For example, ultrasonic flaw detection uses an ultrasonic probe and its support, magnetic particle flaw detection uses a magnetized electrode and a magnetic powder spraying device, and penetrant flaw detection uses a penetrant spraying device, etc. Place the flaw detector 6 on the upper surface of the support plate 4-4 and secure it firmly using bolts, clamps, or other fixing devices on the support plate 4-4. Ensure that the flaw detector 6 remains stable during the lifting and lowering of the support plate 4-4 and during operation, without loosening or displacement.

[0052] Based on the dimensions of workpiece 5 and the radial position of the weld, the operator pushes slider 2-1 to slide on guide rail 2, adjusting the distance between the rotary table 3 and the center of through hole 1-2, so that the weld of workpiece 5 is in the optimal inspection area of ​​flaw detector 6. For workpiece 5 with a larger diameter, rotary table 3 can be moved outward to increase the station diameter, facilitating the placement of workpiece 5 and coverage by flaw detector 6; for workpiece 5 with a smaller diameter, rotary table 3 can be moved inward to decrease the station diameter, bringing workpiece 5 closer to the central flaw detector 6 and optimizing the flaw detection path. After adjustment, slider 2-1 can be fixed to guide rail 2 using locking bolts or other locking mechanisms to prevent radial movement of rotary table 3 during operation.

[0053] Then, by controlling the forward and reverse rotation and running time of motor 4-3, the lifting height of pallet 4-4 is adjusted so that the probe of flaw detector 6 is aligned with the weld position of workpiece 5. After pallet 4-4 is adjusted into place, the self-locking performance of worm gear screw jack 4-2 can keep the position of pallet 4-4 from falling when the machine stops, without the need for additional locking devices. It is simple to operate and safe and reliable.

[0054] During the flaw detection process, workpiece 5 needs to be rotated to inspect various parts of the weld from different angles, achieving a full-circumference scan of the weld. The operator can directly rotate the inner disc 3-3 by hand; the inner disc 3-3 rotates smoothly under the support of bearing 3-2, driving the outer disc 3-4 and workpiece 5 to rotate together. Alternatively, the inner disc 3-3 can be automatically rotated via a configured electric drive device, achieving 360° continuous rotation or angle-based positioning rotation of workpiece 5. During the rotation of workpiece 5, the flaw detector 6 continuously or intermittently inspects the weld, acquiring flaw detection data at various angles and positions of the weld, completing a comprehensive inspection of the weld.

[0055] This device is equipped with multiple rotary tables 3, which can simultaneously hold multiple workpieces 5, enabling parallel or sequential flaw detection operations at multiple stations. While one station is performing flaw detection, other stations can load, rotate, unload, or wait for inspection of workpieces 5. This allows the flaw detector 6 to sequentially inspect workpieces 5 at each station. Alternatively, by adjusting the radial position of each rotary table 3, workpieces 5 from different stations can enter the inspection area of ​​the flaw detector 6 in turn. Parallel operation at multiple stations significantly improves work efficiency, reduces workpiece waiting time, fully utilizes the working time of the flaw detection equipment, and lowers the flaw detection cost per unit workpiece. Loading and unloading operations can be performed synchronously during flaw detection without interference, forming a continuous and efficient flaw detection production cycle.

[0056] When it is necessary to inspect workpieces 5 of different sizes, the operator removes the current outer disk 3-4 from the inner disk 3-3 and then installs the outer disk 3-4 of the required size.

[0057] After the flaw detection is completed, the operator directly removes workpiece 5 from the outer plate 3-4 of the rotary table, completing the flaw detection operation of one workpiece 5. Then, the next workpiece 5 to be inspected is placed on the same station, and the flaw detection operation continues, forming a continuous production cycle.

[0058] The above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. For example, in addition to dovetail groove guide rails and sliders, guide rails 2 and sliders 2-1 can also adopt linear guide rails, rectangular guide rails, or other forms of sliding guide mechanisms; in addition to worm gear screw jacks 4-2, electric lifting machines 4 can also adopt electric cylinders, ball screw lifting modules, hydraulic cylinders, or air cylinders and other lifting drive forms; bearings 3-2 can be selected according to the load, speed, and operating environment of the inner plate 3-3; the number of rotary tables 3 can be set to 2, 3, 4, 5, 6, 7, or more according to actual needs; the number of telescopic rods 4-6 can be 1 or 2.

Claims

1. A multi-station rotary lifting device for weld flaw detection, comprising a worktable, the top of which has a horizontal surface, characterized in that, The workbench has a through hole in the center of its surface, and an electric lift is located below the workbench. The top of the electric lift is equipped with a support plate, which is driven by the electric lift to move up and down through the through hole. The workbench is also provided with multiple rotating platforms, which are arranged in a ring at equal angles around the through hole. Each rotating platform is slidably connected to the workbench via a sliding assembly. The sliding direction of the sliding assembly is along the radial direction of the through hole. The sliding assembly includes a guide rail fixed to the workbench surface and a slider that slides with the guide rail. The rotating platform is fixed on the slider, and each rotating platform includes a rotatable rotating disk.

2. The multi-station rotary lifting device for weld flaw detection according to claim 1, characterized in that: The rotary table also includes a bearing support, which is fixed on the slider, and the rotary disk is rotatably mounted on the bearing support via a bearing and a bearing sleeve.

3. The multi-station rotary lifting device for weld flaw detection according to claim 1, characterized in that: The electric lifting platform includes a base plate, a worm gear screw jack, and a motor. The base plate is fixed to the ground, the worm gear screw jack is mounted on the base plate via a connecting seat, the motor is connected to the input end of the worm gear screw jack, and the support plate is connected to the output end of the worm gear screw jack.

4. The multi-station rotary lifting device for weld flaw detection according to claim 3, characterized in that: The electric lift also includes a guide assembly, which includes a telescopic rod and a sleeve seat. The upper end of the telescopic rod is fixedly connected to the support plate, the sleeve seat is fixed to the base plate, and the lower end of the telescopic rod is inserted into the sleeve seat and slides in cooperation with the sleeve seat.

5. The multi-station rotary lifting device for weld flaw detection according to claim 4, characterized in that: The telescopic rod consists of two rods, which are symmetrically distributed around the center of the support plate and fixedly connected to the support plate. The inner wall of the sleeve seat is provided with an oil-free bushing, and the telescopic rod slides in contact with the sleeve seat through the oil-free bushing.

6. The multi-station rotary lifting device for weld flaw detection according to claim 1, characterized in that: The guide rail is a dovetail groove guide rail, the slider is a dovetail groove slider, and limit blocks are provided at both ends of the guide rail. The limit blocks are used to limit the sliding stroke of the slider.

7. The multi-station rotary lifting device for weld flaw detection according to claim 2, characterized in that: The rotating disk includes an inner disk and an outer disk. A positioning boss is provided at the center of the upper side of the inner disk, and a positioning hole that mates with the positioning boss is provided on the outer disk. The outer disk is detachably fitted onto the inner disk, and different sizes of outer disks can be replaced to accommodate workpieces of different sizes.

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