Laser ultrasonic detection device for circumferential weld of roller wall

Abstract

The utility model discloses a laser ultrasonic detection device for a circumferential weld of a roller wall, which belongs to the technical field of roller weld detection and comprises a shell, a motor is mounted on one side of the shell, a driving roller is fixed on an output shaft of the motor, a limiting structure is arranged in the shell, and a hydraulic cylinder is mounted on the inner top wall of the shell in a sliding manner. A fixing plate is fixed to the telescopic end of the hydraulic cylinder, an ultrasonic detection head is installed at the bottom of the fixing plate, and pressing plates are symmetrically hinged to the bottom of the fixing plate. Through cooperative use of the shell, the motor, the driving roller, the limiting structure, the hydraulic cylinder, the fixing plate, the ultrasonic detection head, the pressing plate, the first spring and the pressing wheel, the upper end and the lower end of a detected roller workpiece can be limited at the same time, the limiting range of the upper end and the lower end of the roller is wider, and the clamping firmness is improved; the problem that the roller shakes or breaks away in the roller welding seam detection process is solved, and therefore the stability of the laser ultrasonic detection device for the roller wall circumferential welding seam is improved.

Description

Technical Field

[0001] This utility model relates to the field of drum weld inspection technology, and in particular to a laser ultrasonic inspection device for drum wall circumferential welds. Background Technology

[0002] The quality of circumferential welds is crucial in the production and use of rollers. Traditional circumferential weld inspection methods, such as radiographic testing and ultrasonic testing, have many limitations. Radiographic testing poses radiation hazards, is detrimental to the health of operators, and involves expensive equipment and complex processes. Conventional ultrasonic testing requires a coupling agent, which is difficult to guarantee for the curved structure of rollers, and its accuracy and efficiency are limited. Laser ultrasonic testing technology, as an emerging non-destructive testing technology, has advantages such as non-contact operation, no need for coupling agent, and high sensitivity. However, most existing laser ultrasonic testing devices are designed for planar structures or simple shapes, and the testing devices for the special structure of roller wall circumferential welds are still imperfect, making it difficult to meet the needs of rapid, accurate, and efficient inspection of roller circumferential welds in actual industrial production.

[0003] For example, utility model application number 202322768033.8 discloses a laser ultrasonic testing device for circumferential weld seams on roller walls. By clamping the workpiece to be tested with clamping rollers, the device can rotate the workpiece while supporting and clamping it. At the same time, a laser ultrasonic testing probe is set below the workpiece to achieve non-contact automated testing of circumferential weld seam defects on the workpiece. This overcomes the disadvantage of traditional piezoelectric ultrasonic testing requiring a coupling agent and achieves efficient testing of circumferential weld seam defects on roller walls.

[0004] The above-mentioned applications still have shortcomings:

[0005] This laser ultrasonic testing device for the circumferential weld of the drum wall clamps the workpiece for testing by clamping rollers. Although it can limit the movement on both sides of the drum, the limiting force is insufficient, the range of the force point on the drum is small, which easily leads to the deviation of the drum and poor stability. In addition, the welded part is not wiped and cleaned during the test, all of which affect the testing accuracy of the drum weld.

[0006] To address this issue, a laser ultrasonic inspection device for the circumferential weld seam of the drum wall was designed. Utility Model Content

[0007] The main purpose of this invention is to provide a laser ultrasonic testing device for the circumferential weld of a drum wall, so as to solve the related technical problems mentioned in the background art.

[0008] The objective of this utility model can be achieved by adopting the following technical solution:

[0009] A laser ultrasonic testing device for circumferential welds on roller walls includes a housing, a motor mounted on one side of the housing, a drive roller fixed to the output shaft of the motor, a limit structure inside the housing, a hydraulic cylinder slidably mounted on the inner top wall of the housing, a fixed plate fixed to the telescopic end of the hydraulic cylinder, an ultrasonic testing head mounted on the bottom of the fixed plate, pressure plates symmetrically hinged to the bottom of the fixed plate, pressure rollers rotatably mounted on one end of each pressure plate, and a spring between the top of each pressure plate and the fixed plate.

[0010] Preferably, the outer shell has through holes on both sides, and positioning plates are symmetrically arranged on the inner sidewall of the outer shell, with the positioning plates slidably connected to the interior of the outer shell. A fixing rod is fixed on one side of each positioning plate, and the fixing rod is slidably connected to the through hole. A U-shaped plate is rotatably connected to one end of each fixing rod. An internal threaded ring is threaded onto the outer side of each fixing rod, and a limiting plate is rotatably connected to one side of each internal threaded ring. Mounting plates are symmetrically installed at the bottom of the positioning plates, and limiting rollers are inclinedly arranged and rotatably connected to the mounting plates.

[0011] Preferably, a movable rod is installed through the top of each fixed plate, a second spring is sleeved on the outside of the movable rod, and the top end of the second spring is fixedly connected to the bottom of the fixed plate. A mounting cover is fixed to the bottom of the movable rod, and an adhesive roller is rotatably installed inside the mounting cover.

[0012] Preferably, a protective ring is provided on the outer side of the inner threaded ring, and vertical stripes are provided on the protective ring.

[0013] Preferably, anti-slip strips are evenly provided on one side of the limiting plate, and the anti-slip strips are rubber anti-slip strips.

[0014] Preferably, the outer side of the drive roller is uniformly provided with limiting plates, and the limiting plates are provided with anti-slip particles.

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

[0016] This utility model provides a laser ultrasonic testing device for circumferential welds on roller walls. Through the coordinated use of a shell, motor, drive roller, limiting structure, hydraulic cylinder, fixing plate, ultrasonic testing head, pressure plate, spring, and pressure roller, it can simultaneously limit the upper and lower ends of the roller workpiece being tested. The wider limiting range of the upper and lower ends on the roller improves the clamping firmness and avoids problems such as roller shaking or detachment during the inspection of roller welds, thereby improving the stability of the laser ultrasonic testing device for circumferential welds on roller walls.

[0017] By using the through hole, fixing rod, inner threaded ring, limiting plate, C-shaped plate, positioning plate, mounting plate and limiting roller in combination, when the starting motor drives the drive roller to rotate, it drives the drum to rotate, while the sticking roller at the top contacts the top of the drum at the same time, and sticks and cleans the dust and impurities at the weld position of the drum. Under the elastic force of spring two, the sticking roller adheres to the outside of drums of different sizes, thereby improving the detection accuracy of the laser ultrasonic detection device for the weld seam of the drum wall.

[0018] By using the movable rod, spring 2, mounting cover and adhesive roller in combination, the inner screw ring is rotated outward. The inner screw ring drives the limiting plate to separate from the outer side of the outer shell, and then the positioning plate moves up and down. The positioning plate drives the mounting plate and the limiting roller to move up and down, adjusting the distance between the limiting roller and the drive roller, so as to limit and drive the rotation of rollers of different diameters, thereby improving the overall flexibility and applicability. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 For the present utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0021] Figure 3 This is a schematic diagram showing the connection between the fixed plate and the movable rod of this utility model;

[0022] Figure 4 This is a schematic diagram showing the connection between the C-shaped plate and the limiting plate of this utility model.

[0023] In the diagram: 1. Outer shell; 2. Motor; 3. Drive roller; 4. Limiting structure; 5. Hydraulic cylinder; 6. Fixing plate; 7. Ultrasonic detection head; 8. Pressure plate; 9. Spring 1; 10. Pressure roller; 11. Through hole; 12. Fixing rod; 13. Inner threaded ring; 14. Limiting plate; 15. C-shaped plate; 16. Positioning plate; 17. Mounting plate; 18. Limiting roller; 19. Movable rod; 20. Spring 2; 21. Mounting cover; 22. Adhesive roller. Detailed Implementation

[0024] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0025] Example 1

[0026] like Figures 1-4As shown, this embodiment provides a laser ultrasonic testing device for circumferential welds on roller walls, including a housing 1. A motor 2 is mounted on one side of the housing 1, and a drive roller 3 is fixed to the output shaft of the motor 2. A limit structure 4 is provided inside the housing 1. A hydraulic cylinder 5 is slidably mounted on the inner top wall of the housing 1. A fixing plate 6 is fixed to the telescopic end of the hydraulic cylinder 5. An ultrasonic testing head 7 is mounted on the bottom of the fixing plate 6. Pressure plates 8 are symmetrically hinged to the bottom of the fixing plate 6. Pressure rollers 10 are rotatably mounted on one end of each pressure plate 8. Springs 9 are provided between the top of the pressure plate 8 and the fixing plate 6. Openings are provided on both sides of the housing 1. There is a through hole 11. The inner sidewall of the outer shell 1 is symmetrically provided with positioning plates 16, and the positioning plates 16 are slidably connected to the interior of the outer shell 1. A fixing rod 12 is fixed on one side of each positioning plate 16, and the fixing rod 12 is slidably connected to the through hole 11. A U-shaped plate 15 is rotatably connected to one end of each fixing rod 12. An inner threaded ring 13 is threaded on the outer side of each fixing rod 12. A limit plate 14 is rotatably connected to one side of each inner threaded ring 13. Mounting plates 17 are symmetrically installed at the bottom of the positioning plates 16. Limiting rollers 18 are obliquely arranged on each mounting plate 17, and the limiting rollers 18 are rotatably connected to the mounting plate 17.

[0027] The roller is placed between the limiting structure 4 and the top of the drive roller 3. The hydraulic cylinder 5 is activated to drive the fixed plate 6 to move downward, which in turn moves the pressure plate 8 and the ultrasonic detection head 7 downward, so that the pressure roller 10 at the bottom of the pressure plate 8 contacts the top of the roller. Under the elastic force of the spring 9, the pressure plate 8 lifts the pressure roller 10, which at the same time limits the top of the roller. The motor 2 is activated to drive the drive roller 3 to rotate, which in turn causes the roller to rotate. The ultrasonic detection head 7 is then used to inspect the weld seam of the rotating roller. When the motor 2 is activated to drive the drive roller 3 to rotate, the roller rotates, and the sticking roller 22 at the top contacts the top of the roller at the same time, which sticks and cleans the dust and impurities at the weld seam of the roller. Under the elastic force of the spring 20, the sticking roller 22 adheres to the outside of rollers of different sizes.

[0028] Example 2

[0029] In this embodiment, as Figures 1-4 As shown, a movable rod 19 is installed through the top of the fixed plate 6. A spring 20 is sleeved on the outside of the movable rod 19, and the top of the spring 20 is fixedly connected to the bottom of the fixed plate 6. A mounting cover 21 is fixedly installed at the bottom of the movable rod 19, and an adhesive roller 22 is rotatably installed inside the mounting cover 21.

[0030] Rotate the inner threaded ring 13 outward, and the inner threaded ring 13 will cause the limiting plate 14 to separate from the outer side of the outer shell 1. Then, the positioning plate 16 will move up and down, and the positioning plate 16 will drive the mounting plate 17 and the limiting roller 18 to move up and down, adjusting the distance between the limiting roller 18 and the drive roller 3.

[0031] In this embodiment, a protective ring is provided on the outer side of the inner threaded ring 13, and vertical stripes are provided on the protective ring.

[0032] The protective ring and vertical stripes facilitate the rotation of the inner threaded ring 13 by the staff, and the greater friction makes operation easier.

[0033] In this embodiment, anti-slip strips are evenly provided on one side of the limiting plate 14, and the anti-slip strips are rubber anti-slip strips.

[0034] The rubber anti-slip strip increases the friction between the limiting plate 14 and the outer side of the outer shell 1, thereby improving the adhesion between the limiting plate 14 and the outer shell 1.

[0035] In this embodiment, limit plates are uniformly arranged on the outer side of the drive roller 3, and anti-slip particles are provided on the limit plates.

[0036] The use of limit plates and anti-slip particles increases friction with the outside of the roller, preventing slippage.

[0037] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A laser ultrasonic testing device for circumferential welds on drum walls, characterized in that: The device includes an outer shell (1), a motor (2) is installed on one side of the outer shell (1), a drive roller (3) is fixed to the output shaft of the motor (2), a limit structure (4) is provided inside the outer shell (1), a hydraulic cylinder (5) is slidably installed on the inner top wall of the outer shell (1), a fixed plate (6) is fixed to the telescopic end of the hydraulic cylinder (5), an ultrasonic detection head (7) is installed at the bottom of the fixed plate (6), a pressure plate (8) is symmetrically hinged at the bottom of the fixed plate (6), a pressure roller (10) is rotatably installed at one end of each pressure plate (8), and a spring (9) is provided between the top of the pressure plate (8) and the fixed plate (6).

2. The laser ultrasonic testing device for circumferential welds of drum walls according to claim 1, characterized in that: Both sides of the outer shell (1) are provided with through holes (11). The inner sidewall of the outer shell (1) is symmetrically provided with positioning plates (16), and the positioning plates (16) are slidably connected to the interior of the outer shell (1). One side of the positioning plates (16) is fixed with a fixing rod (12), and the fixing rod (12) is slidably connected to the through hole (11). One end of the fixing rod (12) is rotatably connected with a U-shaped plate (15). The outer side of the fixing rod (12) is threaded with an inner threaded ring (13). One side of the inner threaded ring (13) is rotatably connected with a limiting plate (14). The bottom of the positioning plates (16) is symmetrically provided with mounting plates (17). Limiting rollers (18) are obliquely arranged on the mounting plates (17), and the limiting rollers (18) are rotatably connected to the mounting plates (17).

3. The laser ultrasonic testing device for circumferential welds of drum walls according to claim 1, characterized in that: The top of the fixed plate (6) is equipped with a movable rod (19), and a spring (20) is sleeved on the outside of the movable rod (19). The top of the spring (20) is fixedly connected to the bottom of the fixed plate (6). The bottom of the movable rod (19) is fixed with a mounting cover (21), and an adhesive roller (22) is rotatably installed inside the mounting cover (21).

4. The laser ultrasonic testing device for circumferential welds of drum walls according to claim 2, characterized in that: The outer side of the inner threaded ring (13) is provided with a protective ring, and the protective ring is provided with vertical stripes.

5. The laser ultrasonic testing device for circumferential welds of drum walls according to claim 2, characterized in that: The limiting plate (14) is uniformly provided with anti-slip strips on one side, and the anti-slip strips are rubber anti-slip strips.

6. The laser ultrasonic testing device for circumferential welds of drum walls according to claim 1, characterized in that: The drive roller (3) has a limit plate evenly arranged on its outer side, and the limit plate is provided with anti-slip particles.

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