Magnetic powder detection device capable of reducing errors and used for welding seam of pressure vessel

Abstract

The utility model discloses a magnetic particle detection device capable of reducing errors for a pressure vessel welding seam, and relates to the technical field of welding seam detection. The device comprises a detection box, a mounting opening is formed in the upper end face of the detection box, a powder storage tank is fixed in the mounting opening, a bottom plate is fixed to the bottom of the detection box, two symmetrically-arranged sliding rails are arranged on the lower end face of the bottom plate, and a plurality of bonding nozzles evenly distributed in the radial direction of the sliding rails are fixed to the lower end faces of the sliding rails. U-shaped openings are formed in the positions, located on the two sides of the mounting opening, in the detection box, and U-shaped electromagnets are fixed in the U-shaped openings. According to the utility model, the sliding rail and the bonding nozzle are matched for use, so that the moving direction of the detection box is limited, it is ensured that magnetic powder is stably scattered on a welding seam, and errors are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of weld inspection technology, and in particular relates to a magnetic particle inspection device for pressure vessel welds that can reduce errors. Background Technology

[0002] The workpiece is magnetized by applying an appropriate magnetizing force, and ferromagnetic powder (in dry powder or suspension form) is applied to specific areas of the workpiece surface. Due to the discontinuity of the material, the magnetic field will be distorted, resulting in partial magnetic flux leakage. These leaking magnetic fields will attract magnetic powder, thus forming magnetic powder deposits (magnetic traces) on the workpiece surface. Under appropriate lighting conditions, these magnetic traces will clearly show the location and shape of defects, allowing inspectors to analyze and compare them according to material acceptance standards.

[0003] However, existing magnetic particle inspection devices for pressure vessel welds suffer from errors due to deviations caused by manual control of the device's movement, resulting in misaligned magnetic particle spillage. Furthermore, switching between two sets of magnetization structures eliminates the need for device rotation control, allowing for complete weld magnetization. Therefore, we provide a magnetic particle inspection device for pressure vessel welds that reduces errors and addresses the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic particle inspection device for pressure vessel welds that can reduce errors. By using a slide rail and a bonding nozzle in combination, the movement direction of the inspection box is limited, ensuring that the magnetic powder is stably sprinkled onto the weld and reducing the occurrence of errors.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a magnetic particle inspection device for pressure vessel welds that can reduce errors, including an inspection box; the upper end face of the inspection box has an installation port, and a powder storage tank is fixed inside the installation port; the bottom of the inspection box has a base plate, and two symmetrically arranged slide rails are arranged on the lower end face of the base plate; multiple adhesive nozzles are fixed on the lower end face of the slide rails and evenly distributed along the radial direction of the slide rails; U-shaped openings are opened inside the inspection box on both sides of the installation port, and U-shaped electromagnets are fixed inside the U-shaped openings.

[0007] The present invention is further configured such that a discharge pipe passing through the detection box and the bottom plate is fixed at the bottom of the powder storage tank, and a ball tube located inside the installation port is fixed at the middle position of the discharge pipe.

[0008] The present invention is further configured such that a through-ball block is rotatably arranged inside the ball tube, and a rotating block is fixed at the end of the shaft that rotates through the surface wall of the through-ball block and passes through the surface wall of the ball tube and the detection box.

[0009] The present invention is further configured such that the two ends of the two sets of U-shaped electromagnets pass through the detection box and the base plate, and the lower end surface of the U-shaped electromagnet is higher than the bottom surface of the slide rail.

[0010] The present invention is further provided that the lower end of the base plate is provided with a slot at the position corresponding to the slide rail, and the base plate is used in conjunction with the slide rail through the slot.

[0011] The present invention is further provided with a cover plate inside the mounting port at the upper end of the powder storage tank, and the protrusion at the lower end of the cover plate is inserted into the upper port of the powder storage tank.

[0012] The present invention is further configured such that two positioning blocks are fixed on the peripheral wall of the cover plate and are evenly distributed along the periphery, and a notch is provided on the inner wall of the mounting opening at the position corresponding to the positioning block, and the positioning block is respectively inserted into the corresponding notch.

[0013] This utility model has the following beneficial effects:

[0014] 1. By squeezing the adhesive nozzle, the nozzle is adhered to the surface of the container due to negative pressure. This can position the slide rail and control the movement of the detection box. After the detection box moves with the slide rail, the movement of the detection box can be ensured to be accurate, thus ensuring that the magnetic powder is stably sprinkled on the weld.

[0015] 2. By switching between two sets of U-shaped electromagnets, the detection box can be controlled to move left and right without having to reverse the entire device, ensuring smooth operation and improving detection efficiency.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a diagram showing the external structure of this utility model.

[0019] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0020] Figure 3 This is a cross-sectional view of the assembly of the detection box and the U-shaped electromagnet in this utility model.

[0021] Figure 4This is a schematic diagram of the appearance of the testing box in this utility model.

[0022] Figure 5 This is an exploded view of the powder storage tank in this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1-Detection box, 101-Base plate, 102-Mounting port, 103-U-shaped port, 104-U-shaped electromagnet, 105-Notch, 106-Bayonet, 2-Slide rail, 201-Adhesive nozzle, 3-Powder storage tank, 301-Cover plate, 302-Positioning block, 303-Discharge pipe, 304-Ball tube, 305-Through ball block, 306-Rotating block. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1, please refer to Figures 1 to 5 This utility model is a magnetic particle inspection device for pressure vessel welds that can reduce errors. By using the slide rail 2 and the adhesive nozzle 201 together, the movement direction of the inspection box 1 is limited, ensuring that the magnetic powder is stably sprinkled on the weld and reducing the occurrence of errors.

[0027] Specifically, the test box 1 has an installation port 102 on its upper surface, and a powder storage tank 3 is fixed inside the installation port 102. A base plate 101 is fixed at the bottom of the test box 1. Two symmetrically arranged slide rails 2 are provided on the lower surface of the base plate 101. Multiple adhesive nozzles 201 are evenly distributed radially along the lower surface of the slide rails 2. U-shaped openings 103 are provided inside the test box 1 on both sides of the installation port 102. U-shaped electromagnets 104 are fixed inside the U-shaped openings 103. The two ends of the two sets of U-shaped electromagnets 104 pass through the test box 1 and the base plate 101, and the lower surface of the U-shaped electromagnets 104 is higher than the bottom surface of the slide rails 2. A latch 106 is provided on the lower surface of the base plate 101 at the position corresponding to the slide rails 2. The base plate 101 is used in conjunction with the slide rails 2 through the latch 106.

[0028] The operation process of this embodiment is as follows: Using the above-described structure, when inspecting the weld seam on the surface of the pressure vessel, the vessel weld seam is placed horizontally upwards. The inspection box 1 is then placed horizontally above the weld seam, with the slide rail 2 positioned on both sides of the weld seam. The weld seam will then be located between the two ends of the U-shaped electromagnet 104. Therefore, firstly, one U-shaped electromagnet 104 is energized, while the other set of U-shaped electromagnets 104 is de-energized. The inspection box 1 is then operated to slide along the path of the slide rail 2, and the powder storage tank 3 is opened. The energized U-shaped electromagnet 104 then magnetizes the weld seam. Therefore, the magnetic powder falling from the powder storage tank 3 will fall along the path to the weld position, and the magnetized magnetic powder will be attracted to the weld. According to the trace path of the magnetic powder on the weld, the fracture position and shape of the weld can be determined. At the same time, in order to ensure the accuracy of the movement of the detection box 1, the slide rail 2 is connected to the surface wall of the container. By squeezing the adhesive nozzle 201, the adhesive nozzle 201 is attracted to the surface wall of the container due to negative pressure. This can provide a certain positioning for the slide rail 2, thereby controlling the movement of the detection box 1. After the detection box 1 moves with the slide rail 2, the movement of the detection box 1 can be ensured to be accurate, thus ensuring that the magnetic powder is stably sprinkled on the weld.

[0029] By switching between two sets of U-shaped electromagnets 104, the detection box 1 can be controlled to move left and right without having to reverse the entire device.

[0030] Example 2, please refer to Figure 2 and Figure 5 Based on Example 1, the rotation of the through ball block 305 driven by the rotating block 306 facilitates the continuous discharge of magnetic powder.

[0031] Specifically, the bottom of the powder storage tank 3 is fixed with a discharge pipe 303 that passes through the detection box 1 and the bottom plate 101. The middle of the discharge pipe 303 is fixed with a ball tube 304 located inside the installation port 102. A through ball block 305 is rotatably arranged inside the ball tube 304. A rotating block 306 is fixed at the end of the shaft that rotates through the surface of the through ball block 305 and passes through the ball tube 304 and the surface of the detection box 1.

[0032] The operation process of this embodiment is as follows: When the ball tube 304 is opened, the rotating block 306 can be directly controlled to rotate, so that the rotating block 306 drives the penetrating ball block 305 to rotate and move in the ball tube 304 through the shaft. This allows the penetrating ball block 305 to open the ball tube 304 so that the magnetic powder falls from the position of the ball tube 304 and the discharge pipe 303 in the powder storage tank 3.

[0033] Example 3, please refer to Figure 2 , Figure 4 and Figure 5 Based on Example 1, the use of cover plate 301 facilitates the addition of magnetic powder.

[0034] Specifically, a cover plate 301 is provided inside the mounting port 102 at the upper end of the powder storage tank 3. The protrusion at the lower end of the cover plate 301 is inserted into the upper port of the powder storage tank 3. Two positioning blocks 302 are fixed on the peripheral wall of the cover plate 301 and are evenly distributed along the periphery. A notch 105 is provided on the inner wall of the mounting port 102 at the position corresponding to the positioning block 302. The positioning blocks 302 are respectively inserted into the corresponding notches 105.

[0035] The operation process of this embodiment is as follows: When adding magnetic powder to the inside of the powder storage tank 3, the cover plate 301 is removed from the port position of the powder storage tank 3 to open the port of the powder storage tank 3, so that the magnetic powder can be poured into the powder storage tank 3. When sealing the powder storage tank 3, the position of the positioning block 302 on the surface of the cover plate 301 corresponding to the recess 105 is controlled so that the cover plate 301 is inserted into the port position of the powder storage tank 3, and the positioning block 302 is in the recess 105, so that the cover plate 301 is prevented from shifting in position in the powder storage tank 3.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A magnetic particle inspection device for pressure vessel welds that can reduce errors, comprising an inspection box (1); characterized in that: The upper end face of the test box (1) is provided with an installation port (102), and a powder storage tank (3) is fixed inside the installation port (102). The bottom of the test box (1) is fixed with a base plate (101). Two symmetrically arranged slide rails (2) are provided on the lower end face of the base plate (101). Multiple adhesive nozzles (201) are fixed on the lower end face of the slide rails (2) and are evenly distributed along the radial direction of the slide rails (2). U-shaped openings (103) are provided inside the test box (1) on both sides of the installation port (102). U-shaped electromagnets (104) are fixed inside the U-shaped openings (103).

2. The magnetic particle inspection device for pressure vessel welds that can reduce errors according to claim 1, characterized in that, The bottom of the powder storage tank (3) is fixed with a discharge pipe (303) that passes through the detection box (1) and the bottom plate (101), and a ball tube (304) located inside the installation port (102) is fixed in the middle of the discharge pipe (303).

3. The magnetic particle inspection device for pressure vessel welds that can reduce errors according to claim 2, characterized in that, The inside of the ball tube (304) is provided with a through ball block (305) that rotates. The end of the shaft of the through ball block (305) that rotates through the ball tube (304) and the surface of the detection box (1) is fixed with a rotating block (306).

4. The magnetic particle inspection device for pressure vessel welds that can reduce errors according to claim 1, characterized in that, The two ends of the two sets of U-shaped electromagnets (104) pass through the detection box (1) and the base plate (101), and the lower end of the U-shaped electromagnet (104) is higher than the bottom surface of the slide rail (2).

5. The magnetic particle inspection device for pressure vessel welds that can reduce errors according to claim 1, characterized in that, The bottom end of the base plate (101) is provided with a slot (106) at the position corresponding to the slide rail (2), and the base plate (101) is used in conjunction with the slide rail (2) through the slot (106).

6. The magnetic particle inspection device for pressure vessel welds that can reduce errors according to claim 1, characterized in that, The powder storage tank (3) has a cover plate (301) inside the mounting port (102) at the upper end, and the protrusion at the lower end of the cover plate (301) is inserted into the upper port of the powder storage tank (3).

7. A magnetic particle inspection device for pressure vessel welds that can reduce errors, as described in claim 6, is characterized in that... The cover plate (301) has two positioning blocks (302) evenly distributed along its periphery. The inner wall of the mounting port (102) is provided with a notch (105) at the position corresponding to the positioning block (302). The positioning block (302) is inserted into the corresponding notch (105).

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