Device for removing redundant penetrant in PT detection

Abstract

The utility model belongs to the technical field of nondestructive penetrant detection, and provides a device for removing redundant penetrant in PT detection, which comprises an outer shell, a lifting grip, a gripper jaw mechanism, a positioning and pressing mechanism and a flexible pressing plate, the lifting grip is arranged in the outer shell, lifting grip sliding grooves are arranged on the inner walls of two sides of the outer shell, the flexible pressing plate comprises an upper pressing plate and a lower pressing plate, and the upper pressing plate and the lower pressing plate are arranged on the outer shell. The upper pressing plate is fixedly connected to the bottom of the sliding groove, the lower pressing plate is connected with the upper pressing plate through a positioning and pressing mechanism, the two sides of the lifting grip are each provided with a set of clamping claw mechanism, each set of clamping claw mechanism comprises a front clamping claw and a rear clamping claw, and the clamping claw mechanisms are arranged between the upper pressing plate and the lower pressing plate; according to the utility model, the penetration detection clearing procedure of the welding joint with curvature on the surface and local unevenness can be effectively executed, the detection efficiency is improved, a detector is protected, and the operation difficulty is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of non-destructive penetrant testing technology, and relates to a device for removing excess penetrant during the penetrant testing process, specifically a device for removing excess penetrant in PT testing. Background Technology

[0002] Penetrant testing, also known as penetrant inspection, is a non-destructive testing method based on the capillary action principle. It is primarily used to detect surface opening defects in non-porous metallic or non-metallic components. Solvent-removable penetrant testing is one of the commonly used penetrant testing methods. The basic process of solvent-removable penetrant testing is: pre-cleaning → penetrant testing → cleaning → development → observation → post-processing. In the inspection of large workpieces or equipment, the cleaning operation is mainly performed by the inspector using a cloth or paper towel coated with organic solvent. Due to time constraints and site conditions, the inspector's uneven wiping force and infrequent cloth replacement compromise the detection sensitivity. Furthermore, during these operations, the limited sealing of ordinary gloves makes the hands easily contaminated by penetrant and organic solvents, which can cause dry skin and even dermatitis with prolonged use.

[0003] In the existing technology, there are cloth clamping devices designed to solve the above problems, each with different focuses. Some focus on the method of stabilizing the clamping of the cloth, while others focus on the method of applying pressure to the detection surface during operation. However, they all suffer from problems such as cumbersome cloth loading and unloading steps, difficulty in controlling the device, and limited applicability to specific detection scenarios. Utility Model Content

[0004] The purpose of this invention is to provide a device for removing excess penetrant during PT testing. By using an instant linkage gripping structure in conjunction with a flexible pressure plate to hold the cloth, the device effectively executes the penetrant testing and cleaning procedure for welded joints with curved surfaces and local unevenness, thereby improving testing efficiency, protecting the tester, and reducing the difficulty of operation.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0006] A device for removing excess penetrant in PT testing includes a housing, a lifting handle, a clamping claw mechanism, a positioning and pressing mechanism, and a flexible pressure plate. The lifting handle is disposed inside the housing, and sliding grooves for the lifting handle are machined on the inner walls of both sides of the housing. The flexible pressure plate includes an upper pressure plate and a lower pressure plate. The upper pressure plate is fixedly connected to the bottom of the sliding groove, and the lower pressure plate is connected to the upper pressure plate through the positioning and pressing mechanism. A set of clamping claw mechanisms is respectively provided on both sides of the lifting handle. Each set of clamping claw mechanisms includes a front clamping claw and a rear clamping claw. The clamping claw mechanisms are disposed between the upper pressure plate and the lower pressure plate. The front clamping claw and the rear clamping claw respectively include a connecting rod, a clamping claw, and a clamping claw drive rod. A trapezoidal hole for the clamping claw to pass through is provided in the middle of the lower pressure plate. The clamping claw is connected to the housing through the connecting rod, and the clamping claw drive rod drives the clamping claw to move up and down within the trapezoidal hole.

[0007] Furthermore, the positioning and clamping mechanism includes connecting springs and positioning screws. The upper pressure plate is connected to the lower pressure plate at its four corners via connecting springs, and the positioning screw passes through the middle of the upper pressure plate and the connecting springs and is fixedly connected to the lower pressure plate.

[0008] Furthermore, the clamping claw consists of a first clamping claw and a second clamping claw that can rotate relative to each other. One end of the connecting rod is rotatably connected to the bottom of the housing, and the end of the connecting rod away from the bottom of the housing is hinged to the first clamping claw. One end of the clamping claw drive rod is connected to the bottom of the lifting handle, and the end of the clamping claw drive rod away from the lifting handle is hinged to the rotating shaft between the first clamping claw and the second clamping claw.

[0009] Furthermore, the second clamping claw that clamps the front claw is thinner at the top and thicker at the bottom, and has an overall trapezoidal column structure. The bottom surface is at a certain angle to the lower pressure plate surface, and the second clamping claw that clamps the rear claw has an overall rectangular column structure.

[0010] Furthermore, the lower pressure plate is made of a material with good elastic deformation capability, and the upper pressure plate has a greater stiffness than the lower pressure plate, so it can produce small deformations with the larger deformation of the lower pressure plate.

[0011] Furthermore, the top two sides of the outer shell are provided with lifting handle limiting grooves, and the position and size of the lifting handle limiting grooves are adapted to the arc-shaped top heads fixed on both sides of the top of the lifting handle.

[0012] Furthermore, a positioning pin is provided in the lifting handle limiting groove, a limiting spring is provided in the rear part of the positioning pin, and the tail of the positioning pin extends out of the outer shell.

[0013] Furthermore, the portion of the positioning pin that extends out of the outer casing is connected to a pull ring.

[0014] The beneficial effects of this invention are: the use of this device makes the wiping steps of the penetrant testing process more controllable, which can improve the testing speed and reliability, realize the effective execution of the penetrant testing and cleaning procedure for welded joints with curved surfaces and local unevenness, improve testing efficiency, prevent potential skin damage caused by direct contact of human hands with PT penetrant or cleaning agent during the testing and wiping process, and improve the efficiency of cleaning agent, cloth and gloves, reducing unnecessary waste and pollution. Attached Figure Description

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

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

[0017] Figure 3 This is a schematic diagram showing the state of the cloth being held by the gripping claw mechanism of the lifting handle of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the clamping front claw in this utility model;

[0019] Figure 5 This is a front view structural diagram of the clamping front claw in this utility model;

[0020] Figure 6 This is a three-dimensional structural diagram of the clamping claw in this utility model;

[0021] Figure 7 This is a front view of the clamping rear claw structure in this utility model;

[0022] Figure 8 This is a schematic diagram of the positioning pin block in this utility model;

[0023] Figure 9 This is a schematic diagram showing the state of the positioning pin block being lifted by the arc-shaped top in this utility model;

[0024] In the diagram: 1. Outer shell; 2. Lifting handle; 3. Lifting handle sliding groove; 4. Upper pressure plate; 5. Lower pressure plate; 6. Connecting spring; 7. Positioning screw; 8. Clamping front claw; 9. Clamping rear claw; 10. Connecting rod; 11. Clamping claw; 111. First clamping claw; 112. Second clamping claw; 113. Rotating shaft; 12. Clamping claw drive rod; 13. Trapezoidal hole; 14. Lifting handle limiting groove; 15. Arc top; 16. Positioning pin block; 17. Limiting spring; 18. Pull ring; 19. Beveled surface; 20. Cloth. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] A device for removing excess penetrant from PT testing, such as... Figure 1 , Figure 2 , Figure 3 The device includes an outer shell 1, a lifting handle 2, a clamping claw mechanism, a positioning and pressing mechanism, and a flexible pressure plate. The lifting handle 2 is located inside the outer shell 1. The outer shell 1 is Ω-shaped, and the inner walls on both sides are machined with lifting handle sliding grooves 3. The flexible pressure plate includes an upper pressure plate 4 and a lower pressure plate 5. The upper pressure plate 4 is fixedly connected to the bottom of the lifting handle sliding groove 3 at the bottom of the Ω-shaped opening of the outer shell 1. The lower pressure plate 5 is connected to the upper pressure plate 4 through the positioning and pressing mechanism. The positioning and pressing mechanism includes a connecting spring 6 and a positioning screw 7. The four corners of the upper pressure plate 4 are connected to the lower pressure plate 5 through the connecting spring 6. The positioning screw 7 passes through the upper pressure plate 4 and the middle ring of the connecting spring 6 and is fixedly connected to the lower pressure plate 5. A set of clamping claw mechanisms is provided on both sides of the lifting handle 2. Each set of clamping claw mechanisms includes a front clamping claw 8 and a rear clamping claw 9. The clamping claw mechanisms are located between the upper pressure plate 4 and the lower pressure plate 5. The front clamping claw 8 and the rear clamping claw 9 each include a connecting rod 10, a clamping claw 11, and a clamping claw drive rod 12. A trapezoidal hole 13 is provided in the middle of the lower pressure plate 5 for the clamping claw 11 to pass through. The clamping claw 11 is connected to the bottom of the outer shell 1 through the connecting rod 10. The clamping claw drive rod 12 drives the clamping claw 11 to move up and down in the trapezoidal hole 13.

[0027] The clamping claw 11 consists of a first clamping claw 111 and a second clamping claw 112 that can rotate relative to a rotating shaft 113. One end of the connecting rod 10 is rotatably connected to the bottom of the outer shell 1. The end of the connecting rod 10 away from the bottom of the outer shell 1 is hinged to the end of the first clamping claw 111 away from the second clamping claw 112. One end of the clamping claw drive rod 12 is connected to the bottom of the lifting handle 2, and the other end is hinged to the rotating shaft 113 between the first clamping claw 111 and the second clamping claw 112.

[0028] like Figures 4 to 7 As shown, the second clamping claw of the front clamping claw 8 is thinner at the top and thicker at the bottom, forming a trapezoidal column structure, with its bottom surface at a certain angle to the surface of the lower pressure plate 5; the second clamping claw of the rear clamping claw 9 has a rectangular column structure. The special configuration of the front and rear clamping claws enables the device to achieve a front-sweeping and rear-shoveling cleaning effect, which is beneficial for clamping thinner cloths in penetrant testing.

[0029] The working principle of the gripper mechanism is as follows: When the handle 2 is in a relaxed state, the first gripper 111 and the second gripper 112 of the gripper front 8 and gripper rear 9 are open. When the penetrant removal step is required, the cloth 20 sprayed with cleaning agent is laid flat on the platform. The operator holds the outer shell 1 and the handle 2 to move the device above the cloth 20 and pulls the handle 2 upward. This drives the gripper drive rod 12 to move upward, thereby compressing and folding the gripper front 8 and the gripper rear 9 and closing them to stably grip the cloth 20 sprayed with cleaning agent on the platform. Under the action of the lower pressure plate 5, the cloth is spread out. The upper pressure plate 4 is pressed by the reverse force of the detection surface through the positioning screw 7 and the connecting spring 6, and moves with the hand.

[0030] The lower pressure plate 5 is made of a material with good elastic deformation capability, while the upper pressure plate 4 has greater rigidity than the lower pressure plate 5. The upper pressure plate 4 can undergo small deformations in response to the larger deformations of the lower pressure plate 5. The lower pressure plate 5, with its certain elastic deformation capability, works in conjunction with the upper pressure plate 4 through a connecting spring, enabling it to adapt to the removal of penetrants from complex shaped surfaces.

[0031] The top two sides of the outer shell 1 are also provided with lifting handle limiting grooves 14, which are adapted to the position and size of the arc-shaped tops 15 fixed on both sides of the top of the lifting handle 2. A positioning pin block 16 is provided inside the lifting handle limiting groove 14. A limiting spring 17 is provided at the rear of the positioning pin block 16. The tail of the positioning pin block 16 extends out of the outer shell 1, and a pull ring 18 is connected to the part of the positioning pin block 16 extending out of the outer shell 1. A rope can be tied to the pull ring 18 for easy pulling. The head of the positioning pin block 16 is provided with a beveled surface 19, such as... Figure 8 As shown. When the operator pulls the lifting handle 2 upwards, the arc of the arc-shaped top 15, in conjunction with the beveled surface 19 of the positioning pin block 16, pushes the arc-shaped top 15 away from the positioning pin block 16 and into the lifting handle limiting groove 14, as shown. Figure 9 As shown, after the arc-shaped top 15 has completely passed the positioning pin 16, the positioning pin 16 will spring back to its original position under the action of the limiting spring 17, thereby locking the arc-shaped top 15 and locking the lifting handle 2. After the cleaning process is completed, pull the pull ring 18 connected to the tail of the positioning pin 16 to compress the limiting spring 17 axially, and the lifting handle 2 will unlock and slide down.

[0032] During wiping, the clamped cloth 20 moves under the guidance of the lifting handle 2 to complete the wiping of the penetrant. After wiping, pull the ring 18 connected to the positioning pin block 16 to release the positioning pin block 16 from limiting the arc-shaped top 15 on the lifting handle 2, so that the clamping front claw 8 and clamping rear claw 9 are released again, the used cloth 20 is put down, and the next clean cloth 20 is clamped to continue to remove excess penetrant.

[0033] This device allows operators to quickly clamp and lock a cloth with organic cleaning agent applied to it by pulling and releasing the handle 2, simplifying the operation, improving cleaning efficiency, and reducing waste and pollution.

[0034] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An apparatus for removing excess penetrant from PT detection, characterized in that: The device includes an outer shell, a lifting handle, a gripping claw mechanism, a positioning and clamping mechanism, and a flexible pressure plate. The lifting handle is located inside the outer shell, and sliding grooves for the lifting handle are machined on the inner walls of both sides of the outer shell. The flexible pressure plate includes an upper pressure plate and a lower pressure plate. The upper pressure plate is fixedly connected to the bottom of the sliding groove, and the lower pressure plate is connected to the upper pressure plate through the positioning and clamping mechanism. A set of gripping claw mechanisms is provided on both sides of the lifting handle. Each set of gripping claw mechanisms includes a front gripping claw and a rear gripping claw. The gripping claw mechanisms are located between the upper pressure plate and the lower pressure plate. The front gripping claw and the rear gripping claw each include a connecting rod, a gripping claw, and a gripping claw drive rod, respectively. A trapezoidal hole for the gripping claw to pass through is provided in the middle of the lower pressure plate. The gripping claw is connected to the outer shell through the connecting rod, and the gripping claw drive rod drives the gripping claw to move up and down within the trapezoidal hole.

2. The apparatus for removing excess penetrant from PT detection according to claim 1, characterized in that: The positioning and clamping mechanism includes connecting springs and positioning screws. The upper pressure plate is connected to the lower pressure plate at its four corners through the connecting springs. The positioning screw passes through the upper pressure plate and the middle ring of the connecting springs and is fixedly connected to the lower pressure plate.

3. The apparatus for removing excess penetrant from PT detection according to claim 1, characterized in that: The clamping claw consists of a first clamping claw and a second clamping claw that can rotate relative to each other. One end of the connecting rod is rotatably connected to the bottom of the housing, and the end of the connecting rod away from the bottom of the housing is hinged to the first clamping claw. One end of the clamping claw drive rod is connected to the bottom of the lifting handle, and the end of the clamping claw drive rod away from the lifting handle is hinged to the rotating shaft between the first clamping claw and the second clamping claw.

4. The apparatus for removing excess penetrant from PT detection according to claim 3, characterized in that: The second clamping claw that holds the front claw is thinner at the top and thicker at the bottom, and has an overall trapezoidal column structure. The bottom surface is at a certain angle to the lower pressure plate surface. The second clamping claw that holds the rear claw has an overall rectangular column structure.

5. The apparatus for removing excess penetrant from PT detection according to claim 1, characterized in that: The lower pressure plate is made of a material with elastic deformation capability, and the upper pressure plate has a greater stiffness than the lower pressure plate, so it can produce small deformations with the larger deformation of the lower pressure plate.

6. The apparatus for removing excess penetrant from PT detection according to claim 1, characterized in that: The top two sides of the outer shell are also provided with lifting handle limiting grooves, and the position and size of the lifting handle limiting grooves are adapted to the arc-shaped top heads fixed on both sides of the top of the lifting handle.

7. The apparatus for removing excess penetrant from PT detection according to claim 6, characterized in that: A positioning pin is provided in the lifting handle limiting groove, a limiting spring is provided in the rear part of the positioning pin, and the tail of the positioning pin extends out of the outer shell.

8. The apparatus for removing excess penetrant from PT detection according to claim 7, characterized in that: The portion of the positioning pin that extends out of the outer casing is connected to a pull ring.

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