Welding seam detection device for pressure vessel

Abstract

The utility model discloses a pressure vessel welding seam detection device, and belongs to the technical field of pressure vessel detection. Comprising a U-shaped support; the U-shaped support is composed of a bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are perpendicularly fixed to the two sides of the bottom plate. A driving shaft and a first screw rod are movably mounted on the first side plate and the second side plate respectively, and the driving shaft and the first screw rod are arranged oppositely; one end, opposite to the first screw rod, of the driving shaft is connected with a pressure vessel body through a fixing mechanism; a cleaning detection mechanism is movably mounted above the pressure vessel body; according to the pressure vessel welding seam detection device, the surface of the pressure vessel can be subjected to ash removal treatment and then detected, the influence of ash attached to the surface of the pressure vessel on a detection result is avoided, welding seam detection on the surface of the pressure vessel can be automatically realized, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model specifically relates to a pressure vessel weld detection device, belonging to the technical field of pressure vessel detection. Background Art

[0002] Pressure vessels play an extremely important role in the petrochemical industry. Horizontal storage tanks, as a type of pressure vessel, are commonly used to store oil, natural gas, and their extracts. Horizontal storage tanks often store flammable, explosive, corrosive, or toxic substances. Therefore, to ensure their integrity, they must be regularly inspected. Existing horizontal storage tanks are large, and most are welded from multiple sections of a cylinder, with circumferential welds. Due to improper welding processes and operations, as well as stress concentration, cracks in the tank body are most common at these welds. Therefore, inspecting these welds is a key focus of regular tank inspections.

[0003] The pressure vessel weld inspection device is a device specially used to check the integrity of welds in pressure vessels. When in use, the operator needs to manually move the inspection equipment to cover the inspection area. Since the distribution positions of different pressure vessel welds are not fixed and there may be multiple different welds, the operator needs to constantly move the inspection equipment to cover the entire inspection area, which is not only inefficient but may also bring safety hazards due to frequent equipment movement. In addition, during the inspection process, since dust, impurities and other contaminants may adhere to the outer surface of the pressure vessel, it is easy to affect the accuracy and effectiveness of the non-destructive testing results. Therefore, in order to solve the above problems, it is urgent to propose a new pressure vessel weld inspection device. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes a pressure vessel weld detection device, which can clean the surface of the pressure vessel before detection, avoiding the impact of dust on the detection results due to dust adhering to the surface of the pressure vessel, and can automatically realize weld detection on the surface of the pressure vessel, thereby improving work efficiency.

[0005] The utility model provides a pressure vessel weld detection device, comprising a U-shaped support; the U-shaped support is composed of a base plate and a first side plate and a second side plate vertically fixed on both sides of the base plate; a driving shaft and a first screw are movably mounted on the first side plate and the second side plate, respectively, and the driving shaft and the first screw are arranged opposite each other; the driving shaft and the first screw are connected to the pressure vessel body at opposite ends via a fixing mechanism; a cleaning detection mechanism is movably mounted above the pressure vessel body.

[0006] Furthermore, the fixing mechanism includes two fixed plates respectively fixedly connected to the first screw and the opposite end of the driving shaft, and the outer side of the fixed plate close to the first screw is also rotatably connected to a rotating shaft; a clamping plate is installed at the end of the rotating shaft; by adjusting the position of the clamping plate, the clamping plate and the fixed plate on the other side can squeeze and clamp the two ends of the pressure vessel body, thereby fixing pressure vessel bodies of different specifications, thereby improving the adaptability of the device.

[0007] Furthermore, the first screw is threadedly connected to the second side plate; one end of the first screw is away from the driving shaft and exposed outside the second side plate, and a handle is installed at the end of the first screw.

[0008] Furthermore, a second screw is installed between the first side plate and the second side plate; the second screw is located above the pressure vessel body; one end of the second screw passes through the second side plate and is fixedly connected to the output end of the servo motor; the other end of the second screw passes through the first side plate, and the second screw is connected to the drive shaft through an engagement mechanism.

[0009] Furthermore, the meshing mechanism is composed of a first gear and a second gear meshing with each other; the first gear is installed at the end of the second screw; and the second gear is installed at the end of the driving shaft.

[0010] Furthermore, a threaded block is threadedly connected to the second screw rod; a fixed ring is fixedly connected to the outer side of the threaded block via a fixed rod; and the fixed ring is movably connected to the rotating ring via a limiting mechanism.

[0011] Furthermore, the cleaning and detection mechanism includes a cleaning brush for cleaning the surface of the pressure vessel body and a detector for detecting welds on the surface of the pressure vessel body; the detector and the cleaning brush are arranged opposite to each other on the upper and lower sides of the rotating ring.

[0012] Furthermore, the threaded block is provided with a threaded opening and two limit openings, and the threaded opening is located in the center of the threaded block, and the limit openings are symmetrically arranged on both sides of the threaded opening; the threaded block is threadedly connected to the second screw through the threaded opening; a limit rod is installed through each of the limit openings; the limit rod is arranged parallel to the second screw, and the two ends of the limit rod extend to the first side plate and the second side plate respectively; the limit rod is arranged on the outside of the second screw, which can play the role of limiting guide, so that the threaded block can be more stable when moving and working.

[0013] Furthermore, the limiting mechanism includes two telescopic rods symmetrically arranged on the outer wall of the fixed ring; the two telescopic rods are respectively installed with limiting beads at one end facing away from the fixed ring; a return spring is sleeved on the outer side of the telescopic rod; one end of the return spring is connected to the fixed ring; the other end of the return spring is connected to the limiting bead; a limiting groove matching the limiting bead is provided on the inner side of the rotating ring along its circumference; limiting holes connected to the limiting groove are respectively provided on the left and right sides of the rotating ring; the limiting bead is clamped in the limiting hole.

[0014] Compared with the existing technology, the pressure vessel weld detection device of the present invention can clean the surface of the pressure vessel before detection, avoiding the phenomenon that the detection results are affected by dust adhering to the surface of the pressure vessel; at the same time, there is no need to manually move the detector position to cover the entire detection area, and the weld detection of the pressure vessel surface can be automatically realized, which saves labor and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the installation structure of the handle and servo motor of the utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the fixed ring and the rotating ring of the utility model.

[0018] Figure 4 It is a schematic diagram of the connection structure of the fixing ring, the telescopic rod, the return spring and the limiting bead of the utility model.

[0019] Figure 5 This is a schematic cross-sectional view of the rotating ring of the present invention.

[0020] The components in the accompanying drawings are marked as: 1. Base plate; 2. First side plate; 3. Second side plate; 4. Handle; 5. First screw; 6. Fixed plate; 7. Rotating shaft; 8. Clamping plate; 9. Pressure vessel body; 10. Servo motor; 11. Second screw; 12. Limit rod; 13. Threaded block; 14. Fixed rod; 15. Fixed ring; 16. Rotating ring; 17. Limiting mouth; 18. Telescopic rod; 19. Return spring; 20. Limiting bead; 21. Limiting groove; 22. Limiting hole; 23. Detector; 24. Cleaning brush; 25. First gear; 26. Second gear; 27. Drive shaft. DETAILED DESCRIPTION

[0021] Example 1:

[0022] like Figures 1 to 5The pressure vessel weld detection device shown includes a U-shaped support; the U-shaped support is composed of a base plate 1 and a first side plate 2 and a second side plate 3 vertically fixed on both sides of the base plate 1; a driving shaft 27 and a first screw 5 are movably mounted on the first side plate 2 and the second side plate 3, respectively, and the driving shaft 27 and the first screw 5 are arranged opposite each other; the driving shaft 27 and the first screw 5 are connected to the pressure vessel body 9 at opposite ends through a fixing mechanism; a cleaning detection mechanism is movably mounted above the pressure vessel body 9.

[0023] In another embodiment, the fixing mechanism includes two fixing plates 6 fixedly connected to the first screw 5 and the opposite ends of the drive shaft 27, respectively, and the outer side of the fixing plate 6 close to the first screw 5 is further rotatably connected to the rotating shaft 7; the end of the rotating shaft 7 is mounted with a clamping plate 8; the first screw 5 is threadedly connected to the second side plate 3; the end of the first screw 5 facing away from the drive shaft 27 is exposed on the outside of the second side plate 3, and the end of the first screw 5 is mounted with a handle 4;

[0024] The position of the clamping plate 8 can be adjusted by the first screw 5 and the handle 4. The surfaces of the clamping plate 8 and the fixed plate 6 squeeze and clamp the two ends of the pressure vessel body 9, so that pressure vessel bodies 9 of different specifications can be fixed, thereby improving the adaptability of the device.

[0025] Furthermore, a second screw 11 is installed between the first side plate 2 and the second side plate 3; the second screw 11 is located above the pressure vessel body 9; one end of the second screw 11 passes through the second side plate 3 and is fixedly connected to the output end of the servo motor 10; the other end of the second screw 11 passes through the first side plate 2 and is transmission-connected to the drive shaft 27 via a meshing mechanism; the meshing mechanism is composed of a first gear 25 and a second gear 26 that mesh with each other; the first gear 25 is mounted on the end of the second screw 11; and the second gear 26 is mounted on the end of the drive shaft 27.

[0026] The servo motor 10 drives the second screw 11 to rotate, thereby driving the first gear 25 at the end of the second screw 11 to rotate; the first gear 25 and the second gear 26 are meshed accordingly, so that the second gear 26 is driven by the second gear 25 to rotate, thereby driving the driving shaft 27 to rotate.

[0027] In another embodiment, the second screw rod 11 is threadedly connected to a threaded block 3; the outer side of the threaded block 3 is fixedly connected to a fixing ring 15 via a fixing rod 14; the fixing ring 15 is movably connected to a rotating ring 16 via a limiting mechanism; the limiting mechanism includes two telescopic rods 18 symmetrically arranged on the outer wall of the fixing ring 16; the two telescopic rods 18 are respectively equipped with limiting beads 20 at one end away from the fixing ring 15; a return spring 19 is sleeved on the outer side of the telescopic rod 18; one end of the return spring 19 is connected to the fixing ring 15; the return spring The other end of 19 is connected to the limiting bead 20; a limiting groove 21 is formed on the inner side of the rotating ring 16 along its circumference, which matches the limiting bead 20; limiting holes 22 are formed on the left and right sides of the rotating ring 16 and communicate with the limiting groove 21; the limiting bead 20 is engaged in the limiting holes 22; the cleaning and detection mechanism includes a cleaning brush 24 for cleaning the surface of the pressure vessel body 9 and a detector 23 for performing weld detection on the surface of the pressure vessel body 9; the detector 23 and the cleaning brush 24 are arranged opposite to each other on the upper and lower sides of the rotating ring 16;

[0028] The coordinated use of the telescopic rod 18, the return spring 19 and the limit bead 20 ensures the stability of the detector 23 and the cleaning brush 24 during normal use. During operation, the cleaning brush 27 is first located at the bottom to clean the surface of the pressure vessel body 9, thereby avoiding the problem of dust adhering to the surface of the pressure vessel body 9 affecting the detection results. After cleaning, the telescopic rod 18 and the return spring 19 are pulled by hand to move the limit bead 20 out of the limit hole 22, thereby allowing the limit bead 20 to rotate in the annular groove 21. When rotated 180°, the two limit beads 20 exchange positions and re-enter the limit hole 22 for fixation. At this time, the detector 23 and the cleaning brush 24 also exchange positions. The surface of the pressure vessel body 9 is inspected by the detector 23. The detector 23 is a flaw detector capable of performing weld detection on equipment in the prior art, such as an ultrasonic flaw detector, an eddy current flaw detector, etc., and its specific structure and working principle are not described in detail here.

[0029] In another embodiment, a threaded opening and two limit openings 17 are formed on the threaded block 3, and the threaded opening is located in the center of the threaded block 3, and the limit openings 17 are symmetrically arranged on both sides of the threaded opening; the threaded block 3 is threadedly connected to the second screw 11 through the threaded opening; a limit rod 12 is installed through each of the limit openings 17; the limit rod 12 is arranged parallel to the second screw 11, and the two ends of the limit rod 12 extend to the first side plate 2 and the second side plate 3 respectively; the limit rod 12 is arranged on the outside of the second screw 11, which can play the role of limiting guide, so that the threaded block 13 can be more stable when moving and working.

[0030] The pressure vessel weld inspection device of the present invention is mainly used to inspect the weld condition of the pressure vessel body 9 and provide a cleaning function during actual operation. Its working principle is as follows:

[0031] First, the worker installs the pressure vessel body 9 to be inspected. By rotating the first screw 5 with the handle 4, the worker drives the fixed plate 6, the rotating shaft 7, and the abutment plate 8 fixedly connected to the end of the first screw 5 to clamp and secure one end of the pressure vessel body 9. At the same time, the first gear 25 on the outside of the second screw 11 meshes with the second gear 26 on the outside of the drive shaft 27. When the pressure vessel body 9 is securely fixed and the servo motor 10 is turned on, the meshing action of the first gear 25 and the second gear 26 causes the drive shaft 27 and the abutment plate 8 to rotate synchronously in the same direction, ensuring stable operation of the entire system.

[0032] Next, the servo motor 10 outside the second side plate 3 is started to drive the second screw 11 directly connected to its output end. A threaded opening is provided in the center of the threaded block 13 to cooperate with the second screw 11. This threaded structure ensures that the two can move relative to each other. In order to achieve stable longitudinal translation and prevent rotation, a limit opening 17 is provided on the threaded block 13, and a limit rod 12 is inserted into the limit opening 17. The limit opening 17 and the limit rod 12 form a sliding relationship, effectively limiting additional rotation during screw advancement.

[0033] The servo motor 10 drives the second screw 11 to rotate, which in turn drives the shaft 27 to rotate through the meshing mechanism, causing the rotating ring 16 to move horizontally while driving the pressure vessel body 9 to rotate, thereby cleaning or inspecting the surface area of ​​the pressure vessel body 9. This eliminates the need to manually move the pressure vessel body 9, saving labor.

[0034] Among them, the detector 23 is used to detect whether there are cracks or other defects in the welds of the pressure vessel body 9, and the cleaning brush 24 can pre-clean the surface of the pressure vessel body 9 to ensure the effectiveness of the entire inspection process; and the entire process has a high degree of automation, which can significantly improve production efficiency and detection accuracy.

[0035] The above embodiments are only preferred implementations of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the scope of the present invention are included in the scope of the present invention.

Claims

1. A pressure vessel weld inspection device, comprising a U-shaped support, the U-shaped support comprising a base plate and first and second side plates vertically fixed to either side of the base plate; characterized in that: A driving shaft and a first screw are movably mounted on the first side plate and the second side plate respectively, and the driving shaft and the first screw are arranged opposite each other; the driving shaft and the first screw are connected to the pressure vessel body at opposite ends through a fixing mechanism; a cleaning detection mechanism is movably mounted above the pressure vessel body.

2. The pressure vessel weld inspection device according to claim 1, characterized in that: The fixing mechanism includes two fixing plates respectively fixedly connected to the first screw and the opposite end of the driving shaft, and the outer side of the fixing plate close to the first screw is also rotatably connected to the rotating shaft; the end of the rotating shaft is equipped with a tightening plate.

3. The pressure vessel weld inspection device according to claim 1 or 2, characterized in that: The first screw is threadedly connected to the second side plate; one end of the first screw is away from the driving shaft and exposed outside the second side plate, and a handle is installed at the end of the first screw.

4. The pressure vessel weld inspection device according to claim 1, characterized in that: A second screw is installed between the first side plate and the second side plate; the second screw is located above the pressure vessel body; one end of the second screw passes through the second side plate and is fixedly connected to the output end of the servo motor; the other end of the second screw passes through the first side plate, and the second screw is connected to the drive shaft through an engagement mechanism.

5. The pressure vessel weld inspection device according to claim 4, characterized in that: The meshing mechanism is composed of a first gear and a second gear meshing with each other; the first gear is installed on the end of the second screw; and the second gear is installed on the end of the driving shaft.

6. The pressure vessel weld inspection device according to claim 4, characterized in that: A threaded block is threadedly connected to the second screw rod; a fixed ring is fixedly connected to the outer side of the threaded block via a fixed rod; and the fixed ring is movably connected to the rotating ring via a limiting mechanism.

7. The pressure vessel weld inspection device according to claim 1, characterized in that: The cleaning and detecting mechanism comprises a cleaning brush for cleaning the surface of the pressure vessel body and a detector for detecting welds on the surface of the pressure vessel body; the detector and the cleaning brush are arranged opposite to each other on the upper and lower sides of the rotating ring.

8. The pressure vessel weld inspection device according to claim 6, characterized in that: The threaded block is provided with a threaded opening and two limit openings, and the threaded opening is located in the center of the threaded block, and the limit openings are symmetrically arranged on both sides of the threaded opening; the threaded block is threadedly connected to the second screw rod through the threaded opening; a limit rod is installed through each of the limit openings; the limit rod is arranged parallel to the second screw rod, and both ends of the limit rod extend to the first side plate and the second side plate respectively.

9. The pressure vessel weld inspection device according to claim 6, characterized in that: The limiting mechanism includes two telescopic rods symmetrically arranged on the outer wall of the fixed ring; limiting beads are respectively installed on the ends of the two telescopic rods facing away from the fixed ring; a return spring is sleeved on the outer side of the telescopic rod; one end of the return spring is connected to the fixed ring; the other end of the return spring is connected to the limiting bead; a limiting groove matching the limiting bead is provided on the inner side of the rotating ring along its circumference; limiting holes connected to the limiting groove are respectively provided on the left and right sides of the rotating ring; the limiting bead is snapped into the limiting hole.

Images