A pressure vessel weld inspection aid

Abstract

The utility model discloses a pressure vessel weld joint detection auxiliary device belongs to weld joint detection technical field, including support frame and pressure vessel body, the support frame is fixed with mounting panel on symmetry, be equipped with a plurality of rotating rollers between two mounting panels, all be equipped with the adjusting mechanism for adjusting rotating roller position on the mounting panel, through the cooperation of above -mentioned each device between, make rotating roller can adjust position according to the size of pressure vessel body, can guarantee the axle of pressure vessel body always with the axle of mounting shaft opposite, through setting the spacing mechanism to the through -hole spacing of pressure vessel body, a plurality of limit plates in spacing mechanism are scattered outward, make limit plate and the through -hole inner wall on pressure vessel body abut, drive mounting shaft can rotate pressure vessel body through spacing mechanism, can realize the effect of detecting to different specifications pressure vessel body in this way, and the more wide application scope.

Description

Technical Field

[0001] This utility model relates to the field of weld inspection technology, specifically an auxiliary device for inspecting welds in pressure vessels. Background Technology

[0002] The body of a pressure vessel is mostly composed of a central cylindrical section and end caps welded together. Therefore, in order to ensure its airtightness, the welds need to be inspected after welding. Currently, weld inspection is mostly carried out using ultrasonic testing equipment. This requires the inspector to hold the ultrasonic probe, bring it into contact with the weld, and then walk around the pressure vessel to inspect the entire weld. Because the ultrasonic probe is connected to the testing equipment body via a wire, the inspector can easily trip over the wire while walking in a circle, causing poor contact, breaking the wire, or even tripping.

[0003] An investigation revealed that a Chinese utility model patent (publication number: CN221506808U) discloses an auxiliary device for inspecting weld seams in pressure vessels, comprising a base frame and a drive device. Several rotating rollers are rotatably mounted on the base frame. The rollers are arranged in an arc shape, and the pressure vessel is mounted inside the arc-shaped area surrounded by the rollers. The circumferential surface of the rollers abuts against the outer wall of the pressure vessel, and the axis of the rollers is arranged parallel to the axis of the pressure vessel.

[0004] Although the aforementioned patent allows the probe to be in close contact with the weld seam of the pressure vessel through the arrangement of the rotating roller and probe bracket, and the rotating roller assists the rotation of the pressure vessel to detect the weld seam, the position of the rotating roller in this device is fixed. However, the size of the pressure vessel varies. Whether the pressure vessel is larger or smaller than the position where the rotating roller is set, the axis of the pressure vessel cannot be coaxial with the insertion rod that drives the pressure vessel to rotate. As a result, the pressure vessel cannot be driven to rotate, and the weld seam cannot be detected. This device can only be used to detect weld seams of pressure vessels of the same specification, which has a very limited scope of application and is not conducive to use.

[0005] Therefore, this utility model provides an auxiliary device for inspecting weld seams in pressure vessels to solve the above-mentioned problems. Utility Model Content

[0006] (a) Technical problems to be solved This invention provides an auxiliary device for inspecting weld seams in pressure vessels, aiming to solve the problems mentioned in the background art.

[0007] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: It includes a support frame and a pressure vessel body. Mounting plates are symmetrically fixed on the support frame, and multiple rotating rollers are provided between two mounting plates. Each mounting plate is provided with an adjustment mechanism for adjusting the position of the rotating rollers. The adjustment mechanism includes a gear ring, multiple driven wheels, a lead screw, and a mounting block. The mounting block is threadedly connected to the lead screw, and the gear ring meshes with the multiple driven wheels. An mounting shaft is rotatably connected to the support frame, and a mounting cylinder is coaxially fixed on the mounting shaft. A limiting mechanism is provided on the mounting cylinder, and the limiting mechanism includes multiple limiting plates.

[0008] As a preferred technical solution of this application, the mounting plate has a mounting groove, the toothed ring and multiple lead screws are rotatably connected in the mounting groove, the multiple driven wheels are coaxially fixed with the multiple lead screws respectively, the side wall of the mounting groove has a sliding groove, and the mounting block is slidably connected in the sliding groove.

[0009] As a preferred technical solution of this application, a connecting plate is fixedly connected to the mounting block, the end of the rotating roller is rotatably connected to the connecting plate, a drive wheel is rotatably connected in the mounting groove and the drive wheel meshes with the gear ring, and a motor is fixedly connected in the mounting groove and the output end of the motor is coaxially fixed with the drive wheel.

[0010] As a preferred technical solution of this application, the limiting mechanism further includes multiple cross-arranged connecting rods, and a second connecting platform is fixedly connected to both the mounting cylinder and the limiting plate. One end of the connecting rod is rotatably connected to the second connecting platform, and a sliding rod is fixedly connected to the side wall of the limiting plate. A slider is slidably connected to the sliding rod.

[0011] As a preferred technical solution of this application, the mounting cylinder has a cavity, a movable block is slidably connected in the cavity, a first connecting platform is fixedly connected to both the movable block and the slider, and the other end of the connecting rod is rotatably connected to the first connecting platform.

[0012] As a preferred technical solution of this application, an electro-hydraulic rod is fixedly connected inside the cavity, and the output end of the electro-hydraulic rod is fixedly connected to the moving block.

[0013] (III) Beneficial Effects By adjusting the position of multiple rotating rollers using an adjustment mechanism, the rollers can be positioned according to the dimensions of the pressure vessel body, ensuring that the axis of the pressure vessel body is always aligned with the axis of the mounting shaft. By setting a limiting mechanism to limit the through-hole of the pressure vessel body, multiple limiting plates in the limiting mechanism are dispersed outward, causing the limiting plates to abut against the inner wall of the through-hole on the pressure vessel body. Driving the mounting shaft can then drive the pressure vessel body to rotate through the limiting mechanism, thereby achieving the effect of testing pressure vessel bodies of different specifications and having a wider range of applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a pressure vessel weld inspection auxiliary device. Figure 2 A cross-sectional view of the mounting plate in an auxiliary device for inspecting weld seams in a pressure vessel. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 A cross-sectional view of the mounting cylinder in an auxiliary device for inspecting weld seams in a pressure vessel; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the internal structure of the mounting plate in an auxiliary device for inspecting weld seams in pressure vessels.

[0015] In the picture: 1. Support frame; 2. Mounting plate; 3. Pressure vessel body; 4. Connecting plate; 5. Rotary roller; 6. Mounting shaft; 7. Mounting cylinder; 8. Limiting plate; 9. Motor; 10. Drive wheel; 11. Gear ring; 12. Driven wheel; 13. Lead screw; 14. Mounting block; 15. Connecting rod; 16. Electro-hydraulic rod; 17. Moving block; 18. First connecting platform; 19. Sliding block; 20. Sliding rod; 21. Second connecting platform. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model provides an auxiliary device for inspecting weld seams in pressure vessels, such as... Figures 1-6As shown, the technical solution includes a support frame 1 and a pressure vessel body 3. It should be noted that a mounting frame is connected to the support frame 1, and a detection probe for inspecting weld seams is connected to the mounting frame via an electric guide rail. An electric telescopic rod is mounted on the detection probe. The electric guide rail and the electric telescopic rod drive the detection probe to abut against the weld seam on the pressure vessel body 3. The detection probe, electric guide rail, and electric telescopic rod are all existing technologies and will not be elaborated upon here. Mounting plates 2 are symmetrically fixed to the support frame 1, and multiple rotating rollers 5 are provided between the two mounting plates 2. Each mounting plate 2 is equipped with an adjustment mechanism for adjusting the position of the rotating rollers 5. The adjustment mechanism includes a gear ring 11, multiple driven wheels 12, a lead screw 13, and a mounting block 14. The mounting block 14 is threadedly connected to the lead screw 13, and the gear ring 11 meshes with the multiple driven wheels 12. A mounting shaft 6 is rotatably connected to the support frame 1, and the mounting shaft 6 is driven by a drive motor and a pulley assembly. A mounting cylinder 7 is coaxially fixed to the mounting shaft 6, and the mounting cylinder 7 is equipped with a limiting mechanism, which includes multiple limiting plates 8.

[0018] The mounting plate 2 has a mounting groove, and the toothed ring 11 and multiple lead screws 13 are rotatably connected in the mounting groove. Multiple driven wheels 12 are coaxially fixed with multiple lead screws 13 respectively. The side wall of the mounting groove has a sliding groove, and the mounting block 14 is slidably connected in the sliding groove. A connecting plate 4 is fixedly connected to the mounting block 14. The end of the rotating roller 5 is rotatably connected to the connecting plate 4. A driving wheel 10 is rotatably connected in the mounting groove, and the driving wheel 10 meshes with the toothed ring 11. A motor 9 is fixedly connected in the mounting groove, and the output end of the motor 9 is coaxially fixed with the driving wheel 10. When in use, the starter motor 9 drives the drive wheel 10 to rotate. The rotating drive wheel 10 drives multiple mounting blocks 14 in the adjustment mechanism to move. The mounting blocks 14 drive the rotating rollers 5 to move synchronously through the connecting plate 4. According to the size of the pressure vessel body 3, the multiple rotating rollers 5 are controlled to disperse or move closer synchronously, so that the axis of the pressure vessel body 3 is always opposite to the axis of the mounting shaft 6. It should be noted that the motor 9 is connected to an external power source through wires. The external power source includes a battery for providing power to the motor 9 and a control switch for controlling its start and stop. The external power source is existing technology. The specific model and specifications of the motor 9 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts existing technology in this field, so it will not be described in detail.

[0019] The limiting mechanism also includes multiple cross-arranged connecting rods 15. A second connecting platform 21 is fixedly connected to both the mounting cylinder 7 and the limiting plate 8. One end of each connecting rod 15 is rotatably connected to the second connecting platform 21. A sliding rod 20 is fixedly connected to the side wall of the limiting plate 8, and a slider 19 is slidably connected to the sliding rod 20. A cavity is opened inside the mounting cylinder 7, and a moving block 17 is slidably connected within the cavity. A first connecting platform 18 is fixedly connected to both the moving block 17 and the slider 19. The other end of each connecting rod 15 is rotatably connected to the first connecting platform 18. An electro-hydraulic rod 16 is fixedly connected within the cavity, and the output end of the electro-hydraulic rod 16 is fixedly connected to the moving block 17. When in use, the electric hydraulic rod 16 is activated to move the moving block 17. The moving block 17 drives multiple limit plates 8 in the limit mechanism to disperse or move closer together. The position of the limit plate 8 is adjusted according to the size of the through hole on the pressure vessel body 3 of different specifications, so that the limit plate 8 abuts against the inner wall of the through hole on the pressure vessel body 3. The drive mounting shaft 6 can drive the pressure vessel body 3 to rotate through the limit mechanism, thereby achieving the effect of detecting pressure vessel bodies 3 of different specifications, and has a wider range of applications.

[0020] In summary: During operation, the starting motor 9 drives the driving wheel 10 to rotate. The rotating driving wheel 10 drives multiple driven wheels 12 to rotate through the gear ring 11, thereby driving multiple lead screws 13 to rotate. The rotating lead screws 13 drive multiple mounting blocks 14 to move. The mounting blocks 14 drive the rotating rollers 5 to move synchronously through the connecting plate 4. According to the size of the pressure vessel body 3, the multiple rotating rollers 5 are controlled to disperse or move closer synchronously, so that the axis of the pressure vessel body 3 is always opposite to the axis of the mounting shaft 6. When the electric hydraulic rod 16 is activated, it drives the moving block 17 to move. When the output end of the electric hydraulic rod 16 retracts, the moving block 17 drives the connecting rod 15 to rotate, which can push the limiting plate 8 away from the mounting cylinder 7. When the output end of the electric hydraulic rod 16 extends, the moving block 17 drives the connecting rod 15 to rotate, which can pull the limiting plate 8 closer to the mounting cylinder 7. The position of the limiting plate 8 is adjusted according to the size of the through hole on the pressure vessel body 3 of different specifications, so that the limiting plate 8 abuts against the inner wall of the through hole on the pressure vessel body 3. The driving mounting shaft 6 can drive the pressure vessel body 3 to rotate through the limiting mechanism.

[0021] The above description is only a preferred 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 technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An auxiliary device for inspecting weld seams of a pressure vessel, comprising a support frame (1) and a pressure vessel body (3), characterized in that: Mounting plates (2) are symmetrically fixed on the support frame (1). Multiple rollers (5) are provided between the two mounting plates (2). Each mounting plate (2) is provided with an adjustment mechanism for adjusting the position of the rollers (5). The adjustment mechanism includes a toothed ring (11), multiple driven wheels (12), a lead screw (13), and a mounting block (14). The mounting block (14) is threadedly connected to the lead screw (13). The toothed ring (11) meshes with multiple driven wheels (12). A mounting shaft (6) is rotatably connected to the support frame (1). A mounting cylinder (7) is coaxially fixed on the mounting shaft (6). A limiting mechanism is provided on the mounting cylinder (7). The limiting mechanism includes multiple limiting plates (8).

2. The auxiliary device for inspecting weld seams of pressure vessels according to claim 1, characterized in that: The mounting plate (2) has a mounting groove, the toothed ring (11) and multiple lead screws (13) are rotatably connected in the mounting groove, multiple driven wheels (12) are coaxially fixed with multiple lead screws (13), a sliding groove is provided on the side wall of the mounting groove, and the mounting block (14) is slidably connected in the sliding groove.

3. The auxiliary device for inspecting weld seams of pressure vessels according to claim 2, characterized in that: A connecting plate (4) is fixedly connected to the mounting block (14). The end of the rotating roller (5) is rotatably connected to the connecting plate (4). A drive wheel (10) is rotatably connected in the mounting groove, and the drive wheel (10) meshes with the gear ring (11). A motor (9) is fixedly connected in the mounting groove, and the output end of the motor (9) is coaxially fixed with the drive wheel (10).

4. The auxiliary device for inspecting weld seams of pressure vessels according to claim 1, characterized in that: The limiting mechanism also includes multiple cross-arranged connecting rods (15), and a second connecting platform (21) is fixedly connected to both the mounting cylinder (7) and the limiting plate (8). One end of the connecting rod (15) is rotatably connected to the second connecting platform (21), and a sliding rod (20) is fixedly connected to the side wall of the limiting plate (8). A slider (19) is slidably connected to the sliding rod (20).

5. The auxiliary device for inspecting weld seams of a pressure vessel according to claim 4, characterized in that: The mounting cylinder (7) has a cavity, and a movable block (17) is slidably connected in the cavity. A first connecting platform (18) is fixedly connected to both the movable block (17) and the slider (19). The other end of the connecting rod (15) is rotatably connected to the first connecting platform (18).

6. The auxiliary device for inspecting weld seams of a pressure vessel according to claim 5, characterized in that: An electric hydraulic rod (16) is fixedly connected inside the cavity, and the output end of the electric hydraulic rod (16) is fixedly connected to the moving block (17).

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