An ultrasonic testing auxiliary positioning device for a pressure vessel welded joint

Abstract

The utility model relates to ultrasonic detection auxiliary positioning device technical field, and disclose a kind of ultrasonic detection auxiliary positioning device of pressure vessel welded joint, including roof.The ultrasonic detection auxiliary positioning device of pressure vessel welded joint, by the setting of left and right moving mechanism and front and back moving mechanism, when using, the drive motor of upper is started, drive motor drives the rotation of first lead screw on output end, and then first lead screw surface screw thread connection first threaded plate left and right movement is carried out, simultaneously, can be started again the servo motor of first threaded plate bottom, servo motor drives the rotation of second lead screw on output end, and then second lead screw surface screw thread connection ultrasonic detector head below second threaded plate front and back movement is carried out, to reach the effect that ultrasonic detector head moves front and back left and right, improve the detection range of ultrasonic detector head, avoid the existence detection blind area and lead to equipment cannot be normally used.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrasonic testing auxiliary positioning devices, and in particular to an ultrasonic testing auxiliary positioning device for welded joints of pressure vessels. Background Technology

[0002] Pressure vessels, as core and critical equipment in fields such as petrochemicals, energy and power, and aerospace, often operate under harsh conditions including high temperature, high pressure, and corrosive media. Welded joints, as weak points in structural mechanics, are prone to major safety accidents such as leaks and explosions due to welding defects (e.g., cracks, porosity, incomplete penetration, slag inclusions). Therefore, extremely high requirements are placed on the accuracy and efficiency of non-destructive testing of welded joints. Ultrasonic testing, with its advantages of strong penetration, high sensitivity, no radiation hazard to humans, and moderate cost, has become the mainstream technology for defect detection in pressure vessel welded joints.

[0003] In ultrasonic testing, the coupling state and relative positional accuracy between the ultrasonic probe and the surface of the pressure vessel weld joint directly determine the accuracy and reliability of the test results. Currently, ultrasonic testing typically involves manually holding the probe or using a simple support to fix it in place. When manually holding the probe, the operator relies on experience to control the probe's trajectory, coupling pressure, and speed, resulting in high labor intensity, low testing efficiency, and potential probe positioning deviations due to hand tremors and operator fatigue. This makes it difficult to ensure precise alignment of the testing path with the weld joint, leading to missed defects or misjudgments. While using a simple support to fix the probe reduces manual labor intensity, the support structure usually only allows for unidirectional movement and lacks flexible adjustment capabilities for left-right and forward-backward movement, making it difficult to adapt to the testing requirements of pressure vessel weld joints with different curvatures and specifications. Utility Model Content

[0004] (a) Technical problems to be solved The purpose of this invention is to provide an ultrasonic testing auxiliary positioning device for welded joints of pressure vessels, which solves the problem mentioned in the background art of lacking flexible adjustment function for bidirectional movement of the probe in the left and right and forward and backward directions, making it difficult to adapt to the testing needs of welded joints of pressure vessels with different curvatures and specifications.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an ultrasonic testing auxiliary positioning device for welded joints of pressure vessels, comprising a top plate, a left-right moving mechanism fixedly connected to one side of the top plate, an extension block fixedly connected to the bottom of the left-right moving mechanism, a front-back moving mechanism fixedly connected to the surface of the extension block, a first electric push rod fixedly connected to the bottom of the front-back moving mechanism, and a disassembly and assembly mechanism fixedly connected to the bottom of the first electric push rod. The left-right moving mechanism includes a drive motor fixedly connected to one side of the top plate, a first lead screw fixedly connected to the output end of the drive motor, and a first threaded plate threadedly connected to the surface of the first lead screw. The front-back moving mechanism includes a servo motor fixedly connected to the surface of the extension block, a second lead screw fixedly connected to the output end of the servo motor, and a second threaded plate threadedly connected to the surface of the second lead screw. The disassembly and assembly mechanism includes an installation port fixedly connected to the bottom of the first electric push rod, limit rails provided on both sides of the installation port, limit posts slidably connected inside the limit rails, an ultrasonic testing head provided on one side of the limit post, and a support spring installed inside the installation port.

[0006] As a further embodiment of this utility model, the extension block is fixedly connected to the bottom of the first threaded plate, and the first electric push rod is fixedly connected to the bottom of the second threaded plate. The first electric push rod is used to drive the ultrasonic detection head to adjust its height.

[0007] As a further embodiment of this utility model, a vertical rod is fixedly connected to the bottom of the top plate, and a clamping platform is fixedly connected to the bottom of the vertical rod. The clamping platform serves to clamp the welding head.

[0008] As a further embodiment of this utility model, a fixed clamping plate is fixedly connected to one side of the clamping platform, and a movable clamping plate is provided on the other side of the clamping platform. The movable clamping plate serves to adjust the clamping distance.

[0009] As a further embodiment of this utility model, a second electric push rod is fixedly connected to one side of the movable clamping plate, and a battery is electrically connected to one side of the second electric push rod via a power line. A welding head is attached to one side of the movable clamping plate. The battery provides continuous power supply.

[0010] As a further embodiment of this utility model, support legs are fixedly connected to the four corners of the bottom of the clamping platform, and reinforcing rods are installed on the surface of the support legs. The support legs serve to support the clamping platform.

[0011] As a further embodiment of this utility model, one side of the drive motor and the servo motor is electrically connected to a PLC controller via a power line. One side of the PLC controller is fixedly connected to the surface of the clamping table. The PLC controller controls the start and stop of the drive motor and the servo motor.

[0012] (III) Beneficial Effects This utility model provides an ultrasonic testing auxiliary positioning device for welded joints of pressure vessels, which has the following beneficial effects: 1. The ultrasonic testing auxiliary positioning device for the welded joint of the pressure vessel, through the setting of left-right moving mechanism and back-forward moving mechanism, when in use, the drive motor at the top is started, which drives the first lead screw on the output end to rotate, thereby causing the first threaded plate connected to the threaded surface of the first lead screw to move left and right. At the same time, the servo motor at the bottom of the first threaded plate can be started again, which drives the second lead screw on the output end to rotate, thereby causing the ultrasonic testing head below the second threaded plate connected to the threaded surface of the second lead screw to move back and forth. This achieves the effect of moving the ultrasonic testing head back and forth and left and right, improving the detection range of the ultrasonic testing head and avoiding the existence of detection blind spots that would cause the equipment to malfunction.

[0013] 2. The ultrasonic testing auxiliary positioning device for the welded joint of the pressure vessel, through the setting of the disassembly and assembly mechanism, when installing the ultrasonic testing head, aligns the limiting posts on both sides of the ultrasonic testing head with the limiting slide rails on both sides of the installation port, then inserts the ultrasonic testing head into the installation port and squeezes the top support spring, so that the limiting posts move to the appropriate position in the limiting slide rails, and then rotates the ultrasonic testing head so that the limiting posts are locked into the limiting grooves of the limiting slide rails, thereby achieving the effect of quickly disassembling and assembling the ultrasonic testing head and improving the disassembly and assembly efficiency of the workers. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the forward and backward moving mechanism of this utility model; Figure 3 This is a schematic diagram of the disassembly and assembly mechanism of this utility model; Figure 4 This is a schematic diagram of the clamping platform structure of this utility model.

[0015] In the diagram: 1. Top plate; 2. Left and right moving mechanism; 201. Drive motor; 202. First lead screw; 203. First threaded plate; 3. Extension block; 4. Front and rear moving mechanism; 401. Servo motor; 402. Second lead screw; 403. Second threaded plate; 5. First electric push rod; 6. Assembly and disassembly mechanism; 601. Mounting port; 602. Limiting slide rail; 603. Limiting post; 604. Ultrasonic detection head; 605. Support spring; 7. Clamping platform; 8. Fixed clamping plate; 9. Moving clamping plate; 10. Second electric push rod; 11. Battery; 12. Welding head; 13. Support leg; 14. Reinforcing rod; 15. PLC controller; 16. Upright pole. 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Example 1 Please see Figures 1 to 4This utility model provides a technical solution: an ultrasonic testing auxiliary positioning device for welded joints of pressure vessels, comprising a top plate 1, a vertical rod 16 fixedly connected to the bottom of the top plate 1, a clamping platform 7 fixedly connected to the bottom of the vertical rod 16, a left-right moving mechanism 2 fixedly connected to one side of the top plate 1, an extension block 3 fixedly connected to the bottom of the left-right moving mechanism 2, the extension block 3 fixedly connected to the bottom of a first threaded plate 203, a first electric push rod 5 fixedly connected to the bottom of a second threaded plate 403, and a front-back moving mechanism 4 fixedly connected to the surface of the extension block 3. Through the left-right moving mechanism 2 and the front-back moving mechanism 4, the ultrasonic testing head 604 can be moved back and forth, left and right, thereby improving the detection range of the ultrasonic testing head 604 and avoiding blind spots that could prevent the equipment from functioning properly. The bottom of the front-back moving mechanism 4 is fixedly connected to the first electric push rod 5, and the bottom of the first electric push rod 5 is fixedly connected to a disassembly and assembly mechanism 6. Through the disassembly and assembly mechanism 6, the ultrasonic testing head 604 can be quickly disassembled and assembled. The effect improves the disassembly and assembly efficiency of the staff. The left and right moving mechanism 2 includes a drive motor 201 fixedly connected to one side of the top plate 1. The drive motor 201 and the servo motor 401 are electrically connected to a PLC controller 15 through a power line. One side of the PLC controller 15 is fixedly connected to the surface of the clamping table 7. The output end of the drive motor 201 is fixedly connected to a first lead screw 202. The surface of the first lead screw 202 is threadedly connected to a first threaded plate 203. The front and rear moving mechanism 4 includes a servo motor 401 fixedly connected to the surface of the extension block 3. The output end of the servo motor 401 is fixedly connected to a second lead screw 402. The surface of the second lead screw 402 is threadedly connected to a second threaded plate 403. The disassembly and assembly mechanism 6 includes an installation port 601 fixedly connected to the bottom of the first electric push rod 5. Limiting slide rails 602 are opened on both sides of the installation port 601. Limiting posts 603 are slidably connected inside the limiting slide rails 602. An ultrasonic detection head 604 is provided on one side of the limiting post 603. A support spring 605 is installed inside the installation port 601. Furthermore, a fixed clamping plate 8 is fixedly connected to one side of the clamping platform 7, and a movable clamping plate 9 is provided on the other side of the clamping platform 7; the movable clamping plate 9 facilitates adjustment of the clamping distance, a second electric push rod 10 is fixedly connected to one side of the movable clamping plate 9, the second electric push rod 10 facilitates the movement of the movable clamping plate 9, a battery 11 is electrically connected to one side of the second electric push rod 10 via a power line, the battery 11 facilitates continuous power supply, a welding head 12 is attached to one side of the movable clamping plate 9; support legs 13 are fixedly connected to the four corners of the bottom of the clamping platform 7, and reinforcing rods 14 are installed on the surface of the support legs 13, the reinforcing rods 14 facilitate the enhancement of the structural strength of the support legs 13.

[0018] In this invention, the working steps of the device are as follows: First step: When in use, start the drive motor 201 at the top. The drive motor 201 drives the first lead screw 202 on the output end to rotate, thereby causing the first threaded plate 203 connected to the threaded surface of the first lead screw 202 to move left and right. At the same time, the servo motor 401 at the bottom of the first threaded plate 203 can be started again. The servo motor 401 drives the second lead screw 402 on the output end to rotate, thereby causing the ultrasonic detection head 604 below the second threaded plate 403 connected to the threaded surface of the second lead screw 402 to move back and forth. The second step: When installing the ultrasonic detection head 604, align the limiting posts 603 on both sides of the ultrasonic detection head 604 with the limiting slide rails 602 on both sides of the mounting port 601. Then, insert the ultrasonic detection head 604 into the mounting port 601 and press the top support spring 605, so that the limiting posts 603 move to a suitable position in the limiting slide rails 602. Then, rotate the ultrasonic detection head 604 so that the limiting posts 603 are engaged in the limiting grooves of the limiting slide rails 602. It should be noted that the device structure and drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system, and control system of the device is not fully described. However, those skilled in the art can clearly understand the specific details of its power mechanism, power supply system, and control system, provided they understand the principle of the above utility model. The control method in the application document is automatic control through a controller, and the control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic testing auxiliary positioning device for welded joints of pressure vessels, comprising a top plate (1), characterized in that: A left-right moving mechanism (2) is fixedly connected to one side of the top plate (1). An extension block (3) is fixedly connected to the bottom of the left-right moving mechanism (2). A front-back moving mechanism (4) is fixedly connected to the surface of the extension block (3). A first electric push rod (5) is fixedly connected to the bottom of the front-back moving mechanism (4). A disassembly and assembly mechanism (6) is fixedly connected to the bottom of the first electric push rod (5). The left and right moving mechanism (2) includes a drive motor (201) fixedly connected to one side of the top plate (1). The output end of the drive motor (201) is fixedly connected to a first lead screw (202), and the surface of the first lead screw (202) is threadedly connected to a first threaded plate (203). The forward and backward moving mechanism (4) includes a servo motor (401) fixedly connected to the surface of the extension block (3). The output end of the servo motor (401) is fixedly connected to a second lead screw (402), and the surface of the second lead screw (402) is threadedly connected to a second threaded plate (403). The disassembly and assembly mechanism (6) includes an installation port (601) fixedly connected to the bottom of the first electric push rod (5). Limiting slide rails (602) are provided on both sides of the installation port (601). Limiting column (603) is slidably connected inside the limiting slide rail (602). An ultrasonic detection head (604) is provided on one side of the limiting column (603). A support spring (605) is installed inside the installation port (601).

2. The ultrasonic testing auxiliary positioning device for welded joints of pressure vessels according to claim 1, characterized in that: The extension block (3) is fixedly connected to the bottom of the first threaded plate (203), and the first electric push rod (5) is fixedly connected to the bottom of the second threaded plate (403).

3. The ultrasonic testing auxiliary positioning device for welded joints of pressure vessels according to claim 1, characterized in that: The bottom of the top plate (1) is fixedly connected to a vertical pole (16), and the bottom of the vertical pole (16) is fixedly connected to a clamping platform (7).

4. The ultrasonic testing auxiliary positioning device for welded joints of pressure vessels according to claim 3, characterized in that: A fixed clamping plate (8) is fixedly connected to one side of the clamping platform (7), and a movable clamping plate (9) is provided on the other side of the clamping platform (7).

5. The ultrasonic testing auxiliary positioning device for welded joints of pressure vessels according to claim 4, characterized in that: A second electric push rod (10) is fixedly connected to one side of the movable clamp (9), and a battery (11) is electrically connected to one side of the second electric push rod (10) via a power line. A welding head (12) is overlapped on one side of the movable clamp (9).

6. The ultrasonic testing-assisted positioning device for welded joints of pressure vessels according to claim 4, characterized in that: The bottom four corners of the clamping platform (7) are fixedly connected with support legs (13), and the surface of the support legs (13) is equipped with reinforcing rods (14).

7. The ultrasonic testing auxiliary positioning device for welded joints of pressure vessels according to claim 1, characterized in that: One side of the drive motor (201) and the servo motor (401) is electrically connected to a PLC controller (15) via a power line, and one side of the PLC controller (15) is fixedly connected to the surface of the clamping table (7).

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