Oil and gas equipment weld nondestructive testing magnetic powder spraying auxiliary device
Patent Information
- Application Number
- CN202522449083.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-19
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-11-19
AI Technical Summary
目前，在油气装备焊缝的磁粉检测实践中，磁粉喷洒环节仍存在明显短板；多数情况下依赖于操作人员手持喷壶或简易喷枪进行手动喷洒，这种方式存在以下固有缺陷：其一，喷洒的均匀性与覆盖范围高度依赖操作者的经验和稳定性，难以保证对环缝或复杂空间位置焊缝的全程均匀覆盖，易导致漏检；其二，人工操作效率低下，劳动强度大，尤其在检测大型装备或批量工件时，成为制约整体检测效率的瓶颈；其三，磁粉悬液浪费严重，且飞溅的磁粉可能污染工作环境与设备；尽管市场上存在一些辅助装置，但往往在适应性、自动化程度及与检测流程的集成度方面有所欠缺，难以满足油气领域对高效、精准、环保检测的日益增长的需求，为此，我们提出油气装备焊缝无损检测磁粉喷洒辅助装置
[0009]与现有技术相比，本实用新型的有益效果是：本油气装备焊缝无损检测磁粉喷洒辅助装置，具有以下好处：
Smart Images
Figure CN224865665U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of weld inspection technology, specifically to a magnetic powder spraying auxiliary device for non-destructive testing of welds in oil and gas equipment. Background Technology
[0002] Oil and gas equipment is a key facility in the extraction, transportation, and storage of oil and gas, mainly including pipelines, storage tanks, drilling platform components, and pressure vessels. This equipment often operates under harsh conditions such as high pressure, high temperature, corrosion, and alternating loads, requiring extremely high structural integrity. Welds, as weak points in this equipment, are prone to expansion under stress if defects such as incomplete fusion, porosity, or cracks exist, leading to leaks or even explosions, causing severe economic losses and environmental impacts. Therefore, efficient and reliable non-destructive testing of welds in oil and gas equipment is essential for ensuring safe energy production. Among numerous non-destructive testing methods, magnetic particle testing is widely used in weld quality inspection due to its high sensitivity to surface and near-surface defects in ferromagnetic materials. The basic principle of this technology is to magnetize the workpiece, creating a leakage magnetic field at the defect location, which attracts magnetic powder applied to the surface, thereby revealing the outline of the defect. The traditional magnetic particle testing process usually includes steps such as weld surface pretreatment, magnetization, magnetic powder spraying, and observation and recording. Among these steps, the uniform spraying of magnetic powder is a key operation that affects the accuracy of the test results and is directly related to the defect detection rate. Currently, in the practice of magnetic particle testing of welds in oil and gas equipment, the magnetic particle spraying process still has significant shortcomings. In most cases, it relies on operators manually spraying with handheld sprayers or simple spray guns. This method has the following inherent defects: First, the uniformity and coverage of the spraying are highly dependent on the operator's experience and stability, making it difficult to guarantee uniform coverage of circumferential welds or welds in complex spatial locations, which can easily lead to missed detections. Second, manual operation is inefficient and labor-intensive, especially when inspecting large equipment or batches of workpieces, becoming a bottleneck restricting the overall testing efficiency. Third, there is significant waste of magnetic particle suspension, and the splashed magnetic particle may contaminate the working environment and equipment. Although some auxiliary devices exist on the market, they often lack adaptability, automation, and integration with the testing process, making it difficult to meet the growing demand for efficient, accurate, and environmentally friendly testing in the oil and gas sector. Therefore, we propose a magnetic particle spraying auxiliary device for non-destructive testing of welds in oil and gas equipment. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a magnetic powder spraying auxiliary device for non-destructive testing of welds in oil and gas equipment. It can realize automatic, uniform, and reciprocating spraying of magnetic suspension liquid and integrate weld surface cleaning function. Closed-loop control is achieved through a mechanical position feedback system, thereby significantly improving the consistency and reliability of the testing operation, effectively reducing the intensity of manual operation and material consumption, and effectively solving the problems in the background technology.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment, comprising a mounting box and an adjustment component; Mounting box: A baffle is hinged to the left end of the front side. Two corresponding hydraulic rods are installed on the left and right sides inside the mounting box. A fastening plate is fixed on the telescopic arm of the hydraulic rod. The end face of the fastening plate is provided with evenly distributed anti-slip grooves. Adjustment component: includes a first electric telescopic rod, a connecting frame, a support frame, and a pressure sensor. The first electric telescopic rod is installed on the left side inside the mounting box. A connecting frame is fixed on the telescopic arm of the first electric telescopic rod. A support frame is fixed on the upper side of the connecting frame. Two corresponding pressure sensors are installed on the front and rear sides of the support frame. A moving component is installed on the right side of the connecting frame. A spraying component is installed on the left side of the moving component. The left and right positions of the moving component are adjusted by setting the first electric telescopic rod. By setting the pressure sensor, when one pressure sensor contacts the corresponding extrusion plate during use, the external PLC controller will automatically control the motor to rotate. Wherein: the input ends of the hydraulic rod and the first electric telescopic rod are both electrically connected to the output end of an external PLC controller, and the pressure sensor is bidirectionally electrically connected to the external PLC controller.
[0005] Furthermore, the moving component includes a fixed ring, a sliding frame, a gear ring, a motor, a gear, and a rubber sealing ring. A fixed ring is fixed to the right side of the support frame. An annular groove is installed at the right end of the fixed ring, and a gear ring is fixed inside the annular groove. A sliding frame is slidably connected to the side of the fixed ring. A motor is installed on the right side of the sliding frame, and a gear is disposed inside the sliding frame. The gear meshes with the gear ring. The output shaft of the motor is fixed to the right end of the gear. A rubber sealing ring is fixed to the right end of the annular groove, and an annular opening is formed at the right end of the rubber sealing ring. The output shaft of the motor is located inside the annular opening. The input end of the motor is electrically connected to the output end of an external PLC controller. The moving component drives the sweeping component and the spraying component.
[0006] Furthermore, it also includes a cleaning assembly, which comprises a second electric telescopic rod, a connecting strip, and brush bristles. The second electric telescopic rod is installed on the lower side of the sliding frame, and a connecting strip is fixed on the telescopic arm of the second electric telescopic rod. Evenly distributed brush bristles are fixed on the lower side of the connecting strip. The input end of the second electric telescopic rod is electrically connected to the output end of an external PLC controller, and the surface of the oil and gas equipment is cleaned by the cleaning assembly.
[0007] Furthermore, the spraying assembly includes a nozzle, an injection pipe, and an extrusion plate. The nozzle is fixed on the left side of the sliding frame, and the injection pipe is fixed inside the inlet of the nozzle. Two corresponding extrusion plates are fixed on the front and rear sides of the sliding frame. The two extrusion plates cooperate with two pressure sensors to spray magnetic powder by setting the spraying assembly.
[0008] Furthermore, a groove is provided on the upper side of the connecting frame, and a storage box is snapped into the inside of the groove. The storage box is connected to the connecting frame by bolts, and the storage box is used to store the residue and the corresponding magnetic powder.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment has the following advantages: 1. A mechanical position feedback system is constructed by combining a pressure sensor and an extrusion plate. When the spraying component reaches the end of its stroke, it can automatically trigger the motor to reverse, thereby achieving precise reciprocating motion without manual intervention. This not only eliminates spraying blind spots and ensures complete coverage of the weld area, but also significantly improves the automation and reliability of the inspection process. 2. The cleaning component and the spraying component are integrated on the same moving component; the cleaning component can be controlled to remove impurities from the weld surface first, and then the spraying component can perform magnetic powder spraying, realizing continuous automated operation of the two key steps; this integrated design greatly shortens the process changeover time and effectively improves the overall inspection efficiency. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a schematic diagram of the spraying component structure of this utility model; Figure 3 This is a schematic diagram of the structure of the mobile component of this utility model.
[0011] In the diagram: 1. Mounting box; 2. Adjustment assembly; 21. First electric telescopic rod; 22. Connecting frame; 23. Support frame; 24. Pressure sensor; 3. Moving assembly; 31. Fixing ring; 32. Sliding frame; 33. Gear ring; 34. Motor; 35. Gear; 36. Rubber sealing ring; 4. Sweeping assembly; 41. Second electric telescopic rod; 42. Connecting strip; 43. Brush bristles; 5. Spraying assembly; 51. Nozzle; 52. Injection pipe; 53. Extrusion plate; 6. Storage box; 7. Bolt; 8. Baffle; 9. Hydraulic rod; 10. Fastening disc. Detailed Implementation
[0012] 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.
[0013] Please see Figure 1-3 This embodiment provides a technical solution: a magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment, including a mounting box 1 and an adjustment component 2; Mounting box 1: A baffle 8 is hinged to the left end of the front side. Two corresponding hydraulic rods 9 are installed on the left and right sides inside the mounting box 1. A fastening plate 10 is fixed on the telescopic arm of the hydraulic rod 9. The end face of the fastening plate 10 is provided with evenly distributed anti-slip grooves. Adjustment component 2 includes a first electric telescopic rod 21, a connecting frame 22, a support frame 23, and pressure sensors 24. The first electric telescopic rod 21 is installed on the left side inside the mounting box 1. The connecting frame 22 is fixed to the telescopic arm of the first electric telescopic rod 21. The support frame 23 is fixed to the upper side of the connecting frame 22. Two corresponding pressure sensors 24 are installed on the front and rear sides of the support frame 23. A moving component 3 is installed on the right side of the connecting frame 22, and a spraying component 5 is installed on the left side of the moving component 3. The left and right positions of the moving component 3 are adjusted by setting the first electric telescopic rod 21. The moving component 3 includes a fixed... The support frame 23 comprises a fixed ring 31, a sliding frame 32, a gear ring 33, a motor 34, a gear 35, and a rubber sealing ring 36. A fixed ring 31 is fixed to the right side of the support frame 23. An annular groove is installed at the right end of the fixed ring 31, and the gear ring 33 is fixed inside the annular groove. A sliding frame 32 is slidably connected to the side of the fixed ring 31. A motor 34 is installed on the right side of the sliding frame 32. A gear 35 is installed inside the sliding frame 32, meshing with the gear ring 33. The output shaft of the motor 34 is fixed to the right end of the gear 35. A rubber sealing ring 36 is fixed to the right end of the annular groove, and an annular opening is provided at the right end of the rubber sealing ring 36. The output shaft of motor 34 is located inside the annular opening. The input end of motor 34 is electrically connected to the output end of an external PLC controller. It also includes a cleaning assembly 4, which comprises a second electric telescopic rod 41, a connecting bar 42, and bristles 43. The second electric telescopic rod 41 is mounted on the lower side of the slide frame 32. The connecting bar 42 is fixed to the telescopic arm of the second electric telescopic rod 41, and evenly distributed bristles 43 are fixed to the lower side of the connecting bar 42. The input end of the second electric telescopic rod 41 is electrically connected to the output end of an external PLC controller. The spraying assembly 5 includes a nozzle 51, a material injection pipe 52, and an extrusion plate 53. The slide frame 3... A nozzle 51 is fixed on the left side of the slide frame 32. A feeding pipe 52 is fixed inside the feed inlet of the nozzle 51. Two corresponding extrusion plates 53 are fixed on the front and rear sides of the slide frame 32. The two extrusion plates 53 cooperate with two pressure sensors 24. The magnetic powder is sprayed by the spraying component 5 and the surface of the oil and gas equipment is cleaned by the cleaning component 4. The cleaning component 4 and the spraying component 5 are connected by the moving component 3. The pressure sensor 24 is set so that when one side of the pressure sensor 24 contacts the corresponding extrusion plate 53, the external PLC controller will automatically control the motor 34 to rotate. Among them, the input ends of the hydraulic rod 9 and the first electric telescopic rod 21 are both electrically connected to the output end of the external PLC controller, and the pressure sensor 24 is bidirectionally electrically connected to the external PLC controller.
[0014] The upper side of the connecting frame 22 has a groove, and the storage box 6 is snapped into the inside of the groove. The storage box 6 is connected to the connecting frame 22 by bolts 7. The storage box 6 is used to store the residue and the corresponding magnetic powder.
[0015] The working principle of the magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment provided by this utility model is as follows: First, open the baffle 8 hinged to the left side of the front of the mounting box 1, place the tubular workpiece to be inspected inside the box, and then start the two corresponding hydraulic rods 9 to drive the fastening discs 10 at the telescopic arm ends to move towards each other. The workpiece is firmly clamped by the anti-slip grooves on the disc surface. Next, start the first electric telescopic rod 21 through the external PLC controller, adjust the overall left and right position of the connecting frame 22 and the support frame 23 fixed on it, the moving component 3 and the spraying component 5, so that the nozzle 51 is accurately aligned with the weld seam. At the beginning of the inspection, the second electric telescopic rod 41 of the cleaning component 4 can be controlled to extend, so that the bristles 43 on the lower side of the connecting strip 42 contacts the weld seam surface. Then, start the motor 34 of the moving component 3. The motor drives the gear 35 to mesh with the toothed ring 33 on the fixed ring 31, thereby driving the sliding frame 32 and its lower part. The cleaning component 4 moves along the weld seam trajectory to remove impurities. After cleaning, the second electric telescopic rod 41 retracts, and the magnetic suspension liquid is delivered through the injection pipe 52 and sprayed out by the nozzle 51. The motor 34 continues to drive the sliding frame 32 to drive the spraying component 5 to move around the weld seam at a uniform speed to achieve uniform spraying. During this process, the extrusion plate 53 fixed to the front and rear sides of the sliding frame 32 moves accordingly. When it reaches the end of the stroke, the extrusion plate 53 will touch the corresponding pressure sensor 24 on the support frame 23. The sensor signal triggers the PLC controller to control the motor 34 to automatically reverse, thereby realizing the automatic reciprocating motion of the spraying component 5 within a limited range to ensure that the weld seam is completely covered. The residue and excess magnetic suspension liquid generated during the entire operation can be collected in the storage box 6 fixed to the connecting frame 22 by bolts 7. After all the tests are completed, each actuator is reset, the hydraulic rod 9 releases the workpiece, and the test is completed.
[0016] It is worth noting that the PLC controller disclosed in the above embodiments is specifically a Siemens S7-200. The pressure sensor 24, the first electric telescopic rod 21, the second electric telescopic rod 41, the motor 34, and the hydraulic rod 9 can be freely configured according to the actual application scenario. The external PLC controller controls the operation of the first electric telescopic rod 21, the second electric telescopic rod 41, the motor 34, and the hydraulic rod 9 using methods commonly used in the prior art.
[0017] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A magnetic particle spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment, characterized in that: Includes mounting box (1) and adjustment assembly (2); Mounting box (1): A baffle (8) is hinged to the left end of the front side. Two corresponding hydraulic rods (9) are installed on the left and right sides inside the mounting box (1). A fastening plate (10) is fixed on the telescopic arm of the hydraulic rod (9). A uniformly distributed anti-slip groove is opened on the end face of the fastening plate (10). Adjustment component (2): includes a first electric telescopic rod (21), a connecting frame (22), a support frame (23) and a pressure sensor (24). The first electric telescopic rod (21) is installed on the left side inside the mounting box (1). The connecting frame (22) is fixed on the telescopic arm of the first electric telescopic rod (21). The support frame (23) is fixed on the upper side of the connecting frame (22). Two corresponding pressure sensors (24) are installed on the front and rear sides of the support frame (23). The moving component (3) is installed on the right side of the connecting frame (22). The spraying component (5) is installed on the left side of the moving component (3). Wherein: the input ends of the hydraulic rod (9) and the first electric telescopic rod (21) are electrically connected to the output end of the external PLC controller, and the pressure sensor (24) is bidirectionally electrically connected to the external PLC controller.
2. The magnetic particle spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment according to claim 1, characterized in that: The moving component (3) includes a fixed ring (31), a sliding frame (32), a gear ring (33), a motor (34), a gear (35), and a rubber sealing ring (36). The right side of the support frame (23) is fixed with a fixed ring (31). An annular groove is installed at the right end of the fixed ring (31). A gear ring (33) is fixed inside the annular groove. A sliding frame (32) is slidably connected to the side of the fixed ring (31). A motor (34) is installed on the right side of the sliding frame (32). A gear (35) is provided inside the sliding frame (32). The gear (35) meshes with the gear ring (33). The output shaft of the motor (34) is fixed at the right end of the gear (35). A rubber sealing ring (36) is fixed at the right end inside the annular groove. An annular opening is provided at the right end of the rubber sealing ring (36). The output shaft of the motor (34) is located inside the annular opening. The input end of the motor (34) is electrically connected to the output end of an external PLC controller.
3. The magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment according to claim 2, characterized in that: It also includes a cleaning assembly (4), which includes a second electric telescopic rod (41), a connecting strip (42) and bristles (43). The second electric telescopic rod (41) is installed on the lower side of the slide frame (32). The connecting strip (42) is fixed on the telescopic arm of the second electric telescopic rod (41). The lower side of the connecting strip (42) is fixed with evenly distributed bristles (43). The input end of the second electric telescopic rod (41) is electrically connected to the output end of an external PLC controller.
4. The magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment according to claim 2, characterized in that: The spraying assembly (5) includes a nozzle (51), a feed pipe (52) and an extrusion plate (53). The nozzle (51) is fixed on the left side of the slide frame (32). The feed pipe (52) is fixed inside the feed inlet of the nozzle (51). Two corresponding extrusion plates (53) are fixed on the front and rear sides of the slide frame (32). The two extrusion plates (53) cooperate with two pressure sensors (24).
5. The magnetic powder spraying auxiliary device for non-destructive testing of weld seams in oil and gas equipment according to claim 1, characterized in that: The upper side of the connecting frame (22) has a groove, and a storage box (6) is snapped into the inside of the groove. The storage box (6) is connected to the connecting frame (22) by bolts (7).