Seamless steel tube end fluorescent magnetic powder inspection device

Abstract

The utility model relates to the technical field of flaw detection devices, in particular to a seamless steel tube end fluorescent magnetic powder flaw detection device. The device comprises a detection box body, a U-shaped shell is arranged at the top of the detection box body, a magnetic defect detector is movably arranged in the U-shaped shell, a spraying assembly is further arranged at the top of the detection box body, a supporting leg frame is arranged at the bottom of the detection box body, and adjusting feet are arranged at the four corners of the bottom of the supporting leg frame. Through the rubber ring on the inner wall of the inlet on the front side of the detection box body, external impurities can be prevented from entering the detection box body, interference of external factors on flaw detection results is reduced, the reliability of the detection results is ensured, in addition, the shading baffles arranged on the two sides of the detection box body can shield external light rays during flaw detection, a low-light environment is created, and the detection efficiency is improved. The display effect of the fluorescent magnetic powder on the surface of the steel pipe is more obvious, and operators can conveniently recognize defects on the surface of the steel pipe.

Description

Technical Field

[0001] This utility model relates to the field of flaw detection device technology, and in particular to a fluorescent magnetic particle flaw detection device for the end of a seamless steel pipe. Background Technology

[0002] In modern industrial production, seamless steel pipes are widely used in various fields such as petroleum, chemical, and power industries due to their superior properties, including high strength and excellent sealing performance. However, during the production and processing of seamless steel pipes, defects such as cracks and porosity are prone to occur at the pipe ends. These defects can seriously affect the quality and safety of the steel pipes, thereby threatening the stable operation of the entire system. Therefore, efficient and accurate flaw detection of the pipe ends of seamless steel pipes is a crucial step in ensuring their quality and safe use.

[0003] Existing magnetic particle inspection equipment has significant deficiencies in the observation stage. In bright environments, external light can interfere with the fluorescent magnetic powder, weakening its fluorescence effect and making it difficult for inspectors to distinguish the location and shape of defects. This not only leads to misjudgments and missed detections, allowing unqualified products to enter the market and creating safety hazards in projects, but also increases production costs and reduces production efficiency due to repeated inspections. Utility Model Content

[0004] The purpose of this invention is to provide a fluorescent magnetic particle flaw detection device for the ends of seamless steel pipes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution, which includes a testing box, a U-shaped shell on the top of the testing box, a magnetic particle flaw detector movably disposed inside the U-shaped shell, a spraying assembly on the top of the testing box, and a support frame at the bottom of the testing box, with adjustable feet at each of the four corners of the bottom of the support frame.

[0006] As a preferred embodiment of this utility model, the front of the detection box is provided with an inlet, the inner wall of the inlet is provided with a rubber ring, the two sides of the detection box are symmetrically provided with observation ports, each observation port is provided with a transparent plate, and the inner bottom surface of the U-shaped shell is provided with a pair of through grooves.

[0007] As a preferred embodiment of this utility model, the inner walls on both sides of the U-shaped shell are provided with sliding grooves, and the magnetic particle flaw detector is fixed to the connecting plates on both sides by several screws. The connecting plates are provided with sliders, which are disposed in the sliding grooves. The magnetic head of the magnetic particle flaw detector passes through the grooves and is located inside the detection box.

[0008] As a preferred embodiment of this utility model, the spraying assembly includes a pump body disposed on the top of the detection box, a liquid storage tank disposed on one side of the pump body, an input end of the pump body disposed in the liquid storage tank, a bend pipe disposed on the output end of the pump body, and a nozzle disposed on the other end of the bend pipe, the nozzle being disposed between the two magnetic heads of the magnetic particle flaw detector.

[0009] As a preferred embodiment of this utility model, the adjusting foot includes an internally threaded cylinder disposed within the support frame, the internally threaded cylinder having a screw threaded on its internal threads, a foot pad being disposed at the bottom of the screw, and an auxiliary nut being disposed at the top of the foot pad.

[0010] As a preferred embodiment of this utility model, a pair of insert shells are provided on both sides of the detection box, and each pair of insert shells is symmetrically arranged on both sides of the observation port. A light-shielding baffle is movably arranged between the two insert shells. The light-shielding baffle is positioned in front of the transparent plate, and a handle is provided on the front of the light-shielding baffle.

[0011] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0012] 1. This utility model uses a rubber ring on the inner wall of the front inlet of the inspection chamber to prevent external impurities from entering the inspection chamber, reduce the interference of external factors on the flaw detection results, and ensure the reliability of the inspection results. In addition, the light-shielding baffles set on both sides of the inspection chamber can block external light during flaw detection, create a low-light environment, and make the display effect of fluorescent magnetic powder on the steel pipe surface more obvious, making it easier for operators to identify defects on the steel pipe surface.

[0013] 2. The pump body, liquid storage tank, bend pipe and nozzle of the spraying assembly of this utility model cooperate with each other. The pump body draws fluorescent magnetic powder liquid from the liquid storage tank and sprays it evenly on the surface of the steel pipe through the nozzle. The nozzle is located between the two magnetic heads of the magnetic particle flaw detector, which ensures that the flaw detection and spraying operations are carried out simultaneously, simplifies the operation process and reduces the waiting time between processes.

[0014] 3. This utility model uses a magnetic particle flaw detector connected to a U-shaped shell groove via a slider, allowing it to move up and down within the U-shaped shell. Operators can easily adjust the position of the flaw detector and adjust its height within the testing chamber according to steel pipes of different diameters. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a side sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the detection box structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the detection box of this utility model when the light-shielding baffle is opened;

[0019] Figure 5 This is a top view of the detection box of this utility model;

[0020] Figure 6 This is a schematic diagram of the spraying component structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the magnetic particle detection component of this utility model;

[0022] Figure 8 This is a schematic diagram of the support frame structure of this utility model;

[0023] Figure 9 This is a schematic diagram of the adjustable foot structure of this utility model.

[0024] Attached reference numerals: 1. Inspection box; 10. U-shaped shell; 11. Slide groove; 12. Observation port; 13. Transparent plate; 14. Inlet; 15. Rubber ring; 16. Through groove; 2. Support leg; 3. Adjustable foot; 30. Internal threaded cylinder; 31. Screw; 32. Foot pad; 33. Auxiliary nut; 4. Magnetic particle flaw detector; 40. Screw; 41. Connecting plate; 42. Slider; 5. Spraying assembly; 50. Pump body; 51. Liquid storage tank; 52. Bend pipe; 53. Nozzle; 6. Insert shell; 60. Light shield; 61. Handle. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0026] like Figures 1-9 As shown, the present invention proposes a fluorescent magnetic particle flaw detection device for the end of a seamless steel pipe. The main body of the flaw detection device is a detection box 1, on which a U-shaped shell 10 is fixedly installed to provide a space for the magnetic particle flaw detector 4 to move. The bottom of the detection box 1 is provided with a support frame 2 to support the entire device. Adjustable feet 3 are installed at the four corners of the bottom of the support frame 2. With the help of the adjustable feet 3, the height and level of the device can be flexibly adjusted to adapt to different working conditions.

[0027] On the front of the inspection chamber 1, there is an inlet 14 for inserting seamless steel pipes. A rubber ring 15 is installed on the inner wall of the inlet 14. The rubber ring 15 can act as a buffer to prevent damage to the inlet 14 when the steel pipe is inserted. Observation ports 12 are symmetrically opened on both sides of the inspection chamber 1. A transparent plate 13 is fixedly installed in each observation port 12. Operators can directly observe the condition of the steel pipe during the flaw detection process through the transparent plate 13.

[0028] The inner walls of both sides of the U-shaped shell 10 are provided with sliding grooves 11. The magnetic particle flaw detector 4 is fixed to the connecting plate 41 by several screws 40 on both sides. The connecting plate 41 is equipped with a slider 42. The slider 42 cooperates with the sliding groove 11, so that the magnetic particle flaw detector 4 can move flexibly inside the U-shaped shell 10, which makes it convenient for operators to adjust the position of the flaw detector. The magnetic head of the magnetic particle flaw detector 4 passes through the through groove 16 opened on the bottom surface of the U-shaped shell 10 and extends into the detection box 1, directly acting on the steel pipe.

[0029] The spraying assembly 5 is installed on the top of the detection box 1. It mainly consists of a pump body 50, a liquid storage tank 51, a bend pipe 52, and a nozzle 53. The liquid storage tank 51 is fixedly connected to one side of the pump body 50. The input end of the pump body 50 is located inside the liquid storage tank 51 and is used to draw fluorescent magnetic powder liquid from the liquid storage tank 51. The output end of the pump body 50 is connected to the bend pipe 52. The nozzle 53 is installed at the other end of the bend pipe 52. The nozzle 53 is located between the two magnetic heads of the magnetic particle flaw detector 4 to ensure that the nozzle 53 can spray the fluorescent magnetic powder liquid evenly onto the surface of the steel pipe during the flaw detection process.

[0030] Adjustable foot 3 is installed inside the support frame 2 and consists of an internal threaded cylinder 30, a screw 31, a foot pad 32, and an auxiliary nut 33. The internal threaded cylinder 30 is fixed inside the support frame 2, and the screw 31 is threadedly connected to the internal threaded cylinder 30. By rotating the screw 31, the extension length of the screw 31 can be adjusted, thereby changing the height of the device. The foot pad 32 is installed at the bottom of the screw 31 to increase the contact area with the ground and ensure the stability of the device. The auxiliary nut 33 is provided on the top of the foot pad 32 to facilitate the operator to adjust the screw 31 more conveniently.

[0031] On each side of the detection chamber 1, there is a pair of insert shells 6, with each pair of insert shells 6 symmetrically distributed on both sides of the observation port 12. A light-shielding baffle 60 can be movably installed between the two insert shells 6. The light-shielding baffle 60 is located in front of the transparent plate 13 and serves to protect and block light. A handle 61 is installed on the front of the light-shielding baffle 60, which allows the operator to flexibly pull the light-shielding baffle 60 to block or expose the observation port 12 as needed.

[0032] When using it, first move the magnetic particle flaw detector to the end of the steel pipe that needs to be inspected, and use a wrench to finely adjust the height of several screws 31 at the bottom of the device until the steel pipe is aligned with the inlet 14. Then, insert the steel pipe smoothly into the inlet 14 so that the position to be inspected is exactly below the magnetic particle flaw detector 4.

[0033] Then, fluorescent magnetic powder liquid is poured into the storage tank 51, and the light-shielding baffle 60 on one side is opened. The operator must wear protective gloves, manually hold the magnetic particle flaw detector 4, and press it down inside the U-shaped shell 10 so that its two magnetic heads contact the outer wall of the steel pipe. Then, the magnetic particle flaw detector 4 is started. At the same time, the pump body 50 is turned on. The pump body 50 sprays the fluorescent magnetic powder liquid in the storage tank 51 evenly onto the outer wall of the steel pipe. After spraying an appropriate amount, the pump body 50 is immediately turned off. Considering the continuous effect of the flaw detector, after the pump body 50 stops working, the magnetic particle flaw detector 4 is allowed to continue running for a period of time to ensure the flaw detection effect before it is turned off.

[0034] The operator carefully inspects the outer wall of the steel pipe through observation port 12. When the steel pipe is free of defects, according to the principle of electromagnetism, the magnetic field lines will be regularly distributed inside the workpiece and run parallel to the surface of the steel pipe. No traces of magnetic powder aggregation will appear on the surface of the steel pipe. However, in areas where there are defects and cracks in the steel pipe, due to the discontinuity of the material, the magnetic field distribution will be uneven, and the magnetic field lines will detach from the surface of the steel pipe, generating a leakage magnetic field. The leakage magnetic field will attract the magnetic particles in the fluorescent magnetic powder, causing them to accumulate at the defect. The light inside the detection box 1 is relatively dim, and the fluorescent magnetic powder will emit bright fluorescence in this environment, which will more clearly show the location and shape of the defect, greatly facilitating the operator's observation and judgment.

[0035] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A fluorescent magnetic particle flaw detection device for the end of a seamless steel pipe, comprising a detection chamber (1), wherein a U-shaped shell (10) is provided on the top of the detection chamber (1), characterized in that: A magnetic particle flaw detector (4) is movably installed inside the U-shaped shell (10). A spraying assembly (5) is also installed on the top of the detection box (1). A support frame (2) is installed at the bottom of the detection box (1). Adjustable feet (3) are installed at the four corners of the bottom of the support frame (2).

2. A fluorescent magnetic particle inspection device for the end of a seamless steel pipe according to claim 1, characterized in that: The detection box (1) has an inlet (14) on the front, and a rubber ring (15) is provided on the inner wall of the inlet (14). The detection box (1) has observation ports (12) symmetrically opened on both sides. Each observation port (12) has a transparent plate (13) inside. The U-shaped shell (10) has a pair of through slots (16) on the inner bottom surface.

3. A fluorescent magnetic particle inspection device for the end of a seamless steel pipe according to claim 2, characterized in that: The inner walls of both sides of the U-shaped shell (10) are provided with sliding grooves (11). Both sides of the magnetic particle flaw detector (4) are fixed with connecting plates (41) by several screws (40). The connecting plates (41) are provided with sliders (42). The sliders (42) are located in the sliding grooves (11). The magnetic head of the magnetic particle flaw detector (4) passes through the through groove (16) and is located in the detection box (1).

4. A fluorescent magnetic particle inspection device for the end of a seamless steel pipe according to claim 1, characterized in that: The spraying assembly (5) includes a pump body (50) disposed on the top of the detection box (1), a liquid storage tank (51) disposed on one side of the pump body (50), the input end of the pump body (50) disposed in the liquid storage tank (51), a bend pipe (52) disposed on the output end of the pump body (50), and a nozzle (53) disposed at the other end of the bend pipe (52), and the nozzle (53) disposed between the two magnetic heads of the magnetic particle flaw detector (4).

5. A fluorescent magnetic particle inspection device for the end of a seamless steel pipe according to claim 1, characterized in that: The adjusting foot (3) includes an internally threaded cylinder (30) disposed in the support frame (2), the internally threaded cylinder (30) is provided with a screw (31) with an internal thread, the bottom of the screw (31) is provided with a foot pad (32), and the top of the foot pad (32) is provided with an auxiliary nut (33).

6. A fluorescent magnetic particle inspection device for the end of a seamless steel pipe according to claim 2, characterized in that: The detection box (1) has a pair of insert shells (6) on both sides, and each pair of insert shells (6) is symmetrically arranged on both sides of the observation port (12). A light-shielding baffle (60) is movably arranged between the two insert shells (6). The light-shielding baffle (60) is arranged in front of the transparent plate (13), and a handle (61) is provided on the front of the light-shielding baffle (60).

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