A method and apparatus for detecting a leak in a container

Abstract

The application discloses a kind of penetration detection tool and method, including framework, mouth edge, compaction frame and wear piece rod, the top of the framework is provided with opening, the framework opening is provided with mouth edge, one end of the compaction frame is hinged with the top of the framework one side, the wear piece rod is connected with mouth edge, and the wear piece rod penetrates the framework.The application solves the stacking problem of perforated parts in penetration detection by the setting of wear piece rod, meets the protection requirements of parts, and secondly solves the problem that the surface of stacked parts may not be covered by penetrant and developer during the detection process.The buckle and compaction frame can quickly fix the wear piece rod, improving the production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of nondestructive testing technology, and particularly relates to a penetrant testing fixture and method. Background Technology

[0002] Non-destructive testing (NDT) is a method of inspecting the surface and internal quality of components without damaging the workpiece or raw materials. Penetrant testing is a technique that uses the surface tension of a liquid to detect surface defects in parts. It is one of the five conventional NDT methods and is often used to detect surface defects in parts during the manufacturing and maintenance stages of aero-engines.

[0003] Many perforated small parts are produced in large quantities and are stacked during penetrant testing. Inspecting these parts often presents the following challenges: First, stacking can cause surface damage from impacts. Second, the small gaps between stacked parts prevent penetrant from fully penetrating the obscured surfaces, resulting in undetectable defects and potential quality issues. Third, during development, developer powder cannot effectively penetrate the stacked parts. Even if penetrant reaches the defect area, the lack of developer to draw out and amplify the penetrant within the defect can lead to missed defects. Therefore, a penetrant testing fixture capable of holding large quantities of multi-perforated parts with spacing between adjacent parts is needed.

[0004] Patent document CN116952965A discloses a fluorescent penetrant testing fixture with damped stage blades and its usage method. The fixture includes a main frame, a fixing unit, and several bottom support rods. The bottom of the main frame is radially connected to the fixing unit by the bottom support rods, which supports the load-bearing bottom of the fixture. The main frame is used for load-bearing and moving and fixing, solving the problem of blade shaking during transportation. The blades are placed in the fixing unit, ensuring that the blade basket can hold a sufficient number of blades without them contacting each other. Fixing individual blades effectively prevents them from contacting each other and reduces collision damage. However, this fixture lacks a mesh barrier structure, making it unsuitable for storing parts. Furthermore, this fixture is suitable for fixing columnar parts, limiting its use for fixing sheet-like parts.

[0005] Patent document CN203998601U discloses a hanging fixture for penetrant testing of hollow blades. It consists of a main frame, a hanging beam, hooks, a lifting ring assembly, and a positioning assembly. However, the hanging beam cannot be moved, making it inconvenient to adjust the number of different mounted parts as needed. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a penetrant testing fixture and method.

[0007] The present invention is achieved through the following technical solutions.

[0008] The present invention provides a penetrant testing fixture, comprising a skeleton, an opening edge, a clamping frame, and a penetrating rod. The skeleton has an opening at the top, and an opening edge is provided on the opening of the skeleton. One end of the clamping frame is hinged to one side of the top of the skeleton via a hinge. The penetrating rod is connected to the opening edge and penetrates through the skeleton.

[0009] Preferably, the opening edge is a rectangular frame structure composed of cylindrical connecting rods, and a groove is provided on the opening edge.

[0010] Preferably, the groove has a V-shaped cross-section and is an annular groove arranged around the axis of the cylindrical connecting rod.

[0011] Preferably, one end of the threading rod is a curved end and the other end is a straight end. The curved end is provided with a bend, and the bend is arranged in a wave shape.

[0012] Preferably, the skeleton has a frame structure, and an isolation net is provided on the outer wall of the skeleton.

[0013] Preferably, a handle is provided on the opening edge, and the handle is rotatably connected to the opening edge.

[0014] Preferably, fasteners are provided on the clamping frame.

[0015] Preferably, the frame is provided with buckles.

[0016] Preferably, the skeleton and the mouth edge are made of stainless steel.

[0017] A method for using a penetrant testing fixture includes the following steps:

[0018] S1: Before the part is inspected, open the buckle, lift the straight end of the part-feeding rod to feed the part, and after feeding the part, put the straight end of the part-feeding rod into the groove, and then lock the clamping frame with the buckle.

[0019] S2: During penetrant testing of parts, the penetrant testing fixture and the entire part are directly immersed in the penetrant solution.

[0020] S3: When cleaning the workpiece after penetration, the outer surface of the part can be cleaned first. After the outer surface is cleaned, the clamping frame can be opened and the straight end of the penetrating rod can be lifted. The penetrating liquid in the part hole of the entire penetrating rod can be fully cleaned. After cleaning, the whole basket can be put into the drying equipment and the developing tank for development. After development, the part on the penetrating rod can be moved to observe the visible surface.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention solves the problem of stacking perforated parts in penetrant testing by using a perforation rod, thus meeting the part protection requirements. Secondly, it addresses the issue that penetrant and developer may not be able to cover the surface of stacked parts during testing. The perforation rod can be quickly secured using hooks and clamping frames, improving production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure for placing the elongated part according to the present invention;

[0025] Figure 3 This is a schematic diagram of the structure for placing the barrel-shaped part according to the present invention;

[0026] Figure 4 This is a schematic diagram of the structure for placing the barrel-shaped part according to the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the insert rod of the present invention;

[0028] Figure 6 This is a structural schematic diagram of the fastener of the present invention;

[0029] Figure 7 This is a schematic diagram of the handle of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure at the groove of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure at the groove of the present invention;

[0032] In the diagram: 1-frame, 11-support rod, 2-mouth edge, 3-isolation net, 4-pressure frame, 41-fastener, 5-threading rod, 51-bent end, 52-straight end, 53-bend, 6-groove, 7-hinge, 8-clasp, 9-handle, 10-part. Detailed Implementation

[0033] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0034] Example:

[0035] like Figures 1 to 9As shown, a penetrant testing fixture includes a frame 1, an opening 2, a clamping frame 4, and a penetrant rod 5. The frame 1 has an opening at its top, and the opening 2 is located on the opening. One end of the clamping frame 4 is hinged to one side of the top of the frame 1 via a hinge 7, allowing the clamping frame 4 to be opened to clamp the penetrant rod 5. The penetrant rod 5 is connected to the opening 2 and penetrates through the frame 1. The clamping frame 1 is mainly welded from φ6 stainless steel support rods 11, with 5 support rods 11 in the width direction and 7 support rods 11 in the length direction. The penetrant rod 5 can simultaneously penetrate multiple perforated parts 10 for penetrant testing, with adjacent perforated parts 10 spaced at a certain distance.

[0036] The opening edge 2 is a rectangular frame structure welded from φ12 stainless steel cylindrical connecting rods. Several grooves 6 are provided on the opening edge 2, so that different threading rods 5 can be set according to the number of hanging parts, and fixed by several grooves 6.

[0037] The groove 6 has a V-shaped cross-section and is an annular groove arranged around the axis of the cylindrical connecting rod, so that the through rod 5 and the bent end 51 can be stuck in the groove 6 on the upper and lower sides of the cylindrical connecting rod at the opening 2.

[0038] The threading rod 5 is made of steel. One end of the threading rod 5 is a bent end 51, and the other end is a straight end 52. The bent end 51 is provided with a bending part 53, which is wavy in shape. The main body of the threading rod 5 and the bent end 51 can be locked in the groove 6 of the opening edge 2, and the bending part 53 locks the locking position to prevent the threading rod 5 from rotating or sliding naturally.

[0039] Part 10 is threaded onto the threading rod 5. One threading rod 5 can thread multiple parts 10. The bent end 51 of the threading rod 5 is inserted into the groove 6 of the opening edge 2 and fixed by the bent end 51. The threading rod 5 can be removed and flipped when needed. The straight end 52 of the threading rod 5 rests on the groove 6. The straight end 52 is not fixed. When the threading rod 5 is threading the part 10, the straight end 52 can be lifted to thread the part. After the part 10 is threaded, the threading rod 5 is put back into the groove 6 and then the clamping frame 4 is used to press the threading rod 5. The threading rod 5 can be installed and easily removed. After removal, the penetrant testing fixture can also be used to hold other parts.

[0040] The frame 1 has a frame structure, and the outer wall of the frame 1 is provided with an isolation net 3 with a size of φ1×10×10. The isolation net 3 is made of stainless steel, so that the frame 1 can be used to store other parts and prevent the parts from falling out of the frame 1.

[0041] A handle 9 is provided on the opening edge 2. The handle 9 is rotatably connected to the opening edge 2, making it easy to lower and store the handle 9. A protective cover can be provided on the handle 9 to improve grip comfort.

[0042] The clamping frame 4 is provided with a fastener 41, which is located on the side away from the hinge 7.

[0043] The frame 1 is provided with a buckle 8. After the buckle 8 is connected to the fastener 41, it locks the clamping frame 4 to prevent the clamping frame 4 from opening. The buckle 8 is made of existing technology. After the buckle 8 is connected to the fastener 41, it automatically locks. The buckle 8 can be separated from the fastener 41 by pressing the unlock button on the buckle 8.

[0044] A method for using a penetrant testing fixture includes the following steps:

[0045] S1: Before the part 10 is inspected, open the buckle 8, lift the straight end 52 of the inserting rod 5 to insert the part, and after inserting the part, put the straight end 52 of the inserting rod 5 into the groove 6, and then lock the clamping frame 4 through the buckle 8.

[0046] S2: When performing penetrant testing on part 10, the penetrant testing fixture and part 10 are directly immersed in the penetrant solution.

[0047] S3: When cleaning the workpiece after penetration, the outer surface of part 10 can be cleaned first. After the outer surface is cleaned, the clamping frame 4 can be opened and the straight end 52 of the penetrating rod 5 can be lifted. The penetrating liquid in the hole of part 10 of the entire penetrating rod 5 can be fully cleaned. After cleaning, the whole basket can be put into the drying equipment and the developing tank for development. After development, the part 10 on the penetrating rod 5 can be moved to observe the visible surface.

[0048] The entire fixture can perform multiple parts clamping and subsequent drying and fixing operations at once, effectively solving the difficulty of penetrant testing of small sleeve-type parts.

Claims

1. A penetrant testing fixture, characterized in that: It includes a skeleton (1), an opening edge (2), a clamping frame (4) and a threading rod (5). The skeleton (1) has an opening at the top, and the opening edge (2) is provided on the opening of the skeleton (1). One end of the clamping frame (4) is hinged to one side of the top of the skeleton (1) through a hinge (7). The threading rod (5) is connected to the opening edge (2) and passes through the skeleton (1). The opening edge (2) is a rectangular frame structure composed of cylindrical connecting rods, and a groove (6) is provided on the opening edge (2). The groove (6) has a V-shaped cross section and is an annular groove arranged around the axis of the cylindrical connecting rod. One end of the threading rod (5) is a bent end (51), and the other end of the threading rod (5) is a straight end (52). A bend (53) is provided on the bent end (51), and the bend (53) is arranged in a wave shape. The skeleton (1) has a frame structure, and the outer wall of the skeleton (1) is provided with an isolation net (3). The frame (1) is provided with buckles (8).

2. The penetrant testing fixture as described in claim 1, characterized in that: A handle (9) is provided on the opening edge (2), and the handle (9) is rotatably connected to the opening edge (2).

3. The penetrant testing fixture as described in claim 1, characterized in that: Fasteners (41) are provided on the clamping frame (4).

4. The penetrant testing fixture as described in claim 1, characterized in that: The skeleton (1) and the mouth edge (2) are both made of stainless steel.

5. A method of using the penetrant testing fixture as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Before the part (10) is inspected, open the buckle (8), lift the straight end (52) of the inserting rod (5) to insert the part, and after inserting the part, put the straight end (52) of the inserting rod (5) into the groove (6), and then lock the clamping frame (4) through the buckle (8). S2: When performing penetrant testing on part (10), the penetrant testing fixture and part (10) are directly immersed in the penetrant solution; S3: When cleaning the workpiece after the penetration is finished, the outer surface of the part (10) can be cleaned first. After the outer surface is cleaned, the clamping frame (4) can be opened and the straight end (52) of the penetrating rod (5) can be lifted. The penetrating liquid in the hole of the part (10) of the entire penetrating rod (5) can be fully cleaned. After the cleaning is finished, the whole basket can be put into the drying equipment and the developing tank for developing. After the developing is finished, the part (10) on the penetrating rod (5) can be moved to observe the visible surface.

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