A magnetic particle detector for non-destructive testing

Abstract

This utility model relates to the field of non-destructive testing equipment technology, specifically a magnetic particle testing instrument for non-destructive testing. It includes a handle, a magnetic particle spraying mechanism, a connecting and fixing mechanism, and a testing mechanism. The magnetic particle spraying mechanism and the connecting and fixing mechanism are fixedly connected to the outer surface of the handle. The magnetic particle spraying mechanism includes a placement slot formed inside the handle. In this utility model, the integration of magnetic particle spraying and testing operations is achieved through the configuration of a circulating connecting tube atomizing nozzle and a clamping assembly. Multiple equidistantly distributed atomizing nozzles can form a wide and uniform spraying area, effectively solving the problems of limited and uneven spraying range of traditional handheld sprayers. This ensures comprehensive magnetic particle coverage of the component surface, improving the accuracy of defect detection. The clamping assembly design makes the installation and replacement of the liquid tank more convenient; disassembly and assembly can be completed by rotating the adjuster, significantly improving the operational efficiency when changing the magnetic suspension liquid and adapting to different testing needs.

Description

Technical Field

[0001] This utility model relates to the field of nondestructive testing equipment technology, and in particular to a magnetic particle testing instrument for nondestructive testing. Background Technology

[0002] In industrial production, quality inspection of metal materials and components is crucial. Non-destructive testing (NDT), as a non-destructive testing method, is widely used. Magnetic particle testing is one of the important methods in NDT. Its principle is based on the fact that when a ferromagnetic material is magnetized, defects on or near the surface will cause distortion of the magnetic field lines, generating a leakage magnetic field. This magnetic field will then attract magnetic powder applied to the workpiece surface, forming a visible magnetic trace, which reveals the location, shape, and size of the defect.

[0003] Existing technologies, such as the utility model disclosed in patent CN 206161590 U, include a handheld magnetic particle detector comprising a connecting channel and a rotating spindle. The connecting channel is located in the handle and extends in a straight line. One end of the rotating spindle is fixedly connected to a magnetic yoke. The rotating spindle is inserted into the connecting channel and can rotate within it. A stop structure is provided on the inner wall of the connecting channel facing the magnetic yoke, and a stop portion is provided at the end of the rotating spindle that extends into the connecting channel, the stop portion stopping against the stop structure. This utility model allows the handle to be held vertically when inspecting confined spaces, which helps to balance the torque generated by the weight of the magnetic particle detector. Multiple slots are evenly distributed circumferentially on the inner wall of the connecting channel, and spindle protrusions are evenly distributed circumferentially on the outer wall of the rotating spindle to mate with the slots. The spindle protrusions engage with the slots, allowing the magnetic yoke to rotate to a suitable angle and remain in position.

[0004] Existing technical solutions require inspectors to hold the magnetic particle testing instrument in one hand and a spray bottle containing magnetic suspension in the other for spraying. This results in a limited range and uneven application. In situations with numerous on-site measurements, the spray bottle occupies one hand for extended periods, reducing work efficiency and affecting the accuracy of defect detection. To address these issues, this invention provides a magnetic particle testing instrument for non-destructive testing. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the existing technology where magnetic powder spraying requires two-hand operation, the spraying is uneven, and the accuracy of defect detection is affected, and to propose a magnetic particle testing instrument for non-destructive testing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a magnetic particle detector for non-destructive testing, comprising a handle, a magnetic particle spraying mechanism, a connecting and fixing mechanism, and a flaw detection mechanism. The magnetic particle spraying mechanism and the connecting and fixing mechanism are fixedly connected to the outer surface of the handle, and the flaw detection mechanism is fixedly connected to the bottom of the handle. The magnetic particle spraying mechanism includes a placement slot formed inside the handle.

[0007] The magnetic powder spraying mechanism includes a circulating connecting pipe and an atomizing nozzle, wherein the atomizing nozzle is fixedly connected to the outer surface of the circulating connecting pipe at equal and uniform intervals.

[0008] The magnetic powder spraying mechanism includes a liquid storage tank fixedly connected inside the placement slot. A clamping assembly is fixedly connected to the outer surface of the liquid storage tank. The liquid storage tank is clamped and connected to the inside of the placement slot by the clamping assembly. A water pump is fixedly connected to one end of the liquid storage tank. One end of the circulation connecting pipe is fixedly connected to the outer surface of the water pump, and the other end of the circulation connecting pipe is fixedly connected to the other end of the liquid storage tank.

[0009] Furthermore, the clamping assembly includes limiting rings fixedly connected to both sides of the placement slot, and the liquid storage tank is engaged inside the placement slot through the limiting rings.

[0010] Furthermore, the limiting ring is threaded with adjusters on both sides, and one end of the adjuster is rotatably connected to a bearing. A clamping plate is fixedly connected to the outer surface of the bearing. The adjuster and the clamping plate are symmetrically arranged inside the limiting ring.

[0011] Furthermore, the limiting ring and the clamping plate are arranged at a distance of two equal parts on the outer surface of the handle, and the liquid storage tank is clamped to the inside of the limiting ring by the clamping plate.

[0012] Furthermore, the connecting and fixing mechanism includes a finger groove formed in the inner top wall of the handle. The finger groove is arranged in four equal parts in the inner top wall of the handle. A telescopic spring is fixedly connected to the outer surface of the finger groove. The telescopic spring is symmetrically arranged on both sides of the finger groove.

[0013] Furthermore, a finger retaining ring is fixedly connected to the bottom of the telescopic spring, and the finger retaining ring and the telescopic spring are arranged at a distance of four equal parts on the inner top wall of the handle.

[0014] Furthermore, the flaw detection mechanism includes a fixed electromagnetic chuck fixedly connected to the bottom of the handle, with limiting members rotatably connected to both sides of the fixed electromagnetic chuck, and a rotating electromagnetic chuck rotatably connected to the outer surface of the limiting members, the rotating electromagnetic chuck being rotatably connected to the bottom of the fixed electromagnetic chuck through the limiting members.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the integration of magnetic powder spraying and detection operations is achieved through the setting of the circulating connecting pipe atomizing nozzle and clamping assembly. Multiple equidistantly distributed atomizing nozzles can form a wide and uniform spraying area, effectively solving the problems of limited and uneven spraying range of traditional handheld sprayers. This ensures comprehensive magnetic powder coverage on the surface of parts and improves the accuracy of defect detection. The design of the clamping assembly makes the installation and replacement of the liquid storage tank more convenient. Disassembly and assembly can be completed by rotating the adjuster, which greatly improves the operational efficiency when replacing magnetic suspension liquid and adapts to different detection needs.

[0016] 2. In this utility model, the design of a telescopic spring, a finger retaining ring, and a rotating electromagnetic chuck significantly improves the stability and comfort of operation. The cooperation between the telescopic spring and the finger retaining ring can adaptively adjust the clamping force according to the finger size of different operators, achieving a stable grip, reducing hand fatigue caused by prolonged operation, and preventing equipment shaking during the testing process from affecting the testing accuracy. The rotating electromagnetic chuck can flexibly adjust the angle to adapt to the testing needs of parts with different shapes, expanding the applicability of the equipment. There is no need to replace the special testing head, further improving the testing efficiency. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of a magnetic particle testing instrument for non-destructive testing is provided for this utility model. Figure 2 This utility model provides a structural schematic diagram of a telescopic spring in a magnetic particle testing instrument used for non-destructive testing; Figure 3 This invention proposes a magnetic particle testing instrument for non-destructive testing. Figure 2 Enlarged view of point A; Figure 4 This utility model provides a frontal structural diagram of a magnetic particle testing instrument used for non-destructive testing; Figure 5 This utility model provides a structural schematic diagram of a limiting ring in a magnetic particle testing instrument used for non-destructive testing; Figure 6 This invention proposes a magnetic particle testing instrument for non-destructive testing. Figure 5 Enlarged view of point B; Figure 7 This invention proposes a magnetic particle testing instrument for non-destructive testing. Figure 5 Enlarged diagram of point C.

[0018] Legend: 1. Handle; 2. Magnetic powder spraying mechanism; 21. Placement slot; 22. Circulation connection pipe; 23. Atomizing nozzle; 24. Liquid storage tank; 25. Clamping assembly; 251. Limiting ring; 252. Regulator; 253. Bearing; 254. Clamping plate; 26. Water pump; 3. Connecting and fixing mechanism; 31. Finger slot; 32. Telescopic spring; 33. Finger fixing ring; 4. Flaw detection mechanism; 41. Fixed electromagnetic chuck; 42. Limiting component; 43. Rotating electromagnetic chuck. Detailed Implementation

[0019] Please see Figure 1-7 This utility model provides a technical solution: a magnetic particle detector for non-destructive testing, including a handle 1, a magnetic particle spraying mechanism 2, a connecting and fixing mechanism 3, and a flaw detection mechanism 4. The magnetic particle spraying mechanism 2 and the connecting and fixing mechanism 3 are fixedly connected to the outer surface of the handle 1, and the flaw detection mechanism 4 is fixedly connected to the bottom of the handle 1. The magnetic particle spraying mechanism 2 includes a placement slot 21 opened inside the handle 1.

[0020] The following section will describe in detail the specific setup and function of its magnetic powder spraying mechanism 2, connecting and fixing mechanism 3, and flaw detection mechanism 4.

[0021] In this embodiment: the magnetic powder spraying mechanism 2 includes a circulating connecting pipe 22 and an atomizing nozzle 23, and the atomizing nozzle 23 is uniformly and evenly fixedly connected to the outer surface of the circulating connecting pipe 22 at equal intervals.

[0022] The magnetic powder spraying mechanism 2 includes a liquid storage tank 24 fixedly connected inside the placement slot 21. A clamping assembly 25 is fixedly connected to the outer surface of the liquid storage tank 24. The liquid storage tank 24 is clamped and connected to the inside of the placement slot 21 by the clamping assembly 25. A water pump 26 is fixedly connected to one end of the liquid storage tank 24. One end of the circulation connecting pipe 22 is fixedly connected to the outer surface of the water pump 26, and the other end of the circulation connecting pipe 22 is fixedly connected to the other end of the liquid storage tank 24.

[0023] The aforementioned components achieve the following effect: the circulation connecting pipe 22, atomizing nozzle 23, liquid storage tank 24, clamping assembly 25, and water pump 26 together constitute a complete and efficient magnetic powder spraying system. The water pump 26 provides stable power to transport the magnetic suspension to the atomizing nozzle 23 through the circulation connecting pipe 22. The atomizing nozzle 23 atomizes the magnetic suspension and sprays it evenly. Combined with the flexible adjustment characteristics of the circulation connecting pipe 22, it can adapt to the spraying requirements of different angles and positions. The clamping assembly 25 ensures that the liquid storage tank 24 is stably fixed during the testing process, avoiding the magnetic suspension from spilling or the delivery being interrupted due to equipment movement.

[0024] Specifically, the clamping assembly 25 includes limiting rings 251 fixedly connected to both sides of the placement slot 21, and the liquid storage tank 24 is engaged inside the placement slot 21 by the limiting rings 251.

[0025] The aforementioned components achieve the following effects: the limiting ring 251 provides precise positioning and initial fixation for the storage tank 24, ensuring that the storage tank 24 can be smoothly placed into the placement slot 21 and limiting the large horizontal sway of the storage tank 24. This ensures that the connection between the storage tank 24 and the water pump 26 and the circulation connection pipe 22 remains stable, preventing pipe detachment or leakage caused by displacement of the storage tank 24, and providing a basic guarantee for the stable delivery of the magnetic suspension liquid.

[0026] Specifically, the two sides of the limiting ring 251 are threadedly connected to the adjuster 252, one end of the adjuster 252 is rotatably connected to the bearing 253, and the outer surface of the bearing 253 is fixedly connected to the clamping plate 254. The adjuster 252 and the clamping plate 254 are symmetrically arranged inside the limiting ring 251.

[0027] The effects achieved by the above components are as follows: the symmetrically arranged regulator 252 and clamping plate 254 can achieve bidirectional clamping of the liquid storage tank 24 by rotating the regulator 252. The bearing 253 ensures that when the regulator 252 rotates, the clamping plate 254 only moves horizontally and does not rotate with the regulator 252, thus avoiding frictional damage between the clamping plate 254 and the liquid storage tank 24, preventing excessive clamping force from damaging the liquid storage tank 24, and achieving reliable fixation and flexible disassembly of the liquid storage tank 24.

[0028] Specifically, the limiting ring 251 and the clamping plate 254 are arranged at a distance of two equal parts on the outer surface of the handle 1, and the liquid storage tank 24 is clamped to the inside of the limiting ring 251 by the clamping plate 254.

[0029] The effects achieved by the above components are as follows: the bi-divided distance setting ensures that the liquid storage tank 24 is subjected to uniform and symmetrical force within the placement slot 21, avoiding tilting of the liquid storage tank 24 due to unilateral force. This balanced force state ensures that the liquid level of the magnetic suspension inside the liquid storage tank 24 remains horizontal, preventing the magnetic suspension from being completely extracted by the water pump 26 due to tilting. It also reduces local wear between the liquid storage tank 24 and the inner wall of the placement slot 21, extends the service life of the liquid storage tank 24, and ensures the long-term stable operation of the magnetic powder spraying mechanism 2.

[0030] Specifically, the connecting and fixing mechanism 3 includes a finger groove 31 formed in the inner top wall of the handle 1. The finger groove 31 is arranged in four equal parts in the inner top wall of the handle 1. A telescopic spring 32 is fixedly connected to the outer surface of the finger groove 31. The telescopic spring 32 is symmetrically arranged on both sides of the finger groove 31.

[0031] The effects achieved by the above components are as follows: the finger grooves 31, which are set at four equal intervals, match the natural distribution of human fingers, so that the operator's thumb, index finger, middle finger and ring finger can be inserted into the corresponding grooves respectively, realizing the initial fit and positioning of the hand and the handle 1. The symmetrically set telescopic springs 32 can automatically extend and retract according to the depth and thickness of the fingers inserted, generating symmetrical elastic force, which not only ensures the stability of the fingers in the grooves, but also prevents poor blood circulation in the hand due to excessive tightness, thus providing basic comfort for long-term operation.

[0032] Specifically, a finger retaining ring 33 is fixedly connected to the bottom of the telescopic spring 32, and the finger retaining ring 33 and the telescopic spring 32 are arranged at four equal intervals on the inner top wall of the handle 1.

[0033] The aforementioned components achieve the following effects: the four equally spaced finger retaining rings 33 correspond one-to-one with the finger grooves 31, further securing the fingers within the grooves. The silicone finger retaining rings 33 possess excellent elasticity and friction, allowing them to closely conform to the finger skin and effectively prevent slippage of the handle 1 caused by equipment shaking, vibration, or hand sweating during the testing process. Simultaneously, the cooperation between the telescopic spring 32 and the finger retaining rings 33 can accommodate differences in finger sizes among different operators, ensuring a stable and comfortable grip experience for operators with both thick and thin fingers, thereby enhancing the stability of the testing operation.

[0034] Specifically, the flaw detection mechanism 4 includes a fixed electromagnetic chuck 41 fixedly connected to the bottom of the handle 1. Limiting members 42 are rotatably connected to both sides of the fixed electromagnetic chuck 41. A rotating electromagnetic chuck 43 is rotatably connected to the outer surface of the limiting members 42. The rotating electromagnetic chuck 43 is rotatably connected to the bottom of the fixed electromagnetic chuck 41 through the limiting members 42.

[0035] The effects achieved by the above components are as follows: the fixed electromagnetic chuck 41, as the basic magnetization component, can provide a stable magnetic field foundation; the rotating electromagnetic chuck 43 can be angled through the limiting member 42, so that it can cooperate with the fixed electromagnetic chuck 41 to adapt to the surface of parts with different shapes and curves; the damping design of the limiting member 42 ensures that the rotating electromagnetic chuck 43 can stay stably at any angle, ensuring the stability of the magnetic field during the magnetization process, thereby improving the accuracy and comprehensiveness of defect detection.

[0036] Working principle: When in use, the magnetic suspension liquid is first injected into the storage tank 24 and fixed in the placement slot 21 by the clamping assembly 25. The rotating adjuster 252 makes the clamping plate 254 tightly clamp the storage tank 24. The operator puts his finger into the finger slot 31, and the finger fixing ring 33 fixes the finger under the action of the telescopic spring 32 to achieve a stable grip.

[0037] Based on the shape of the component to be inspected, the angle of the rotating electromagnetic chuck 43 is adjusted by the limiting member 42 so that it and the fixed electromagnetic chuck 41 are in contact with the surface of the component. When the power is turned on, the excitation coils in the fixed electromagnetic chuck 41 and the rotating electromagnetic chuck 43 generate a magnetic field to magnetize the component. At the same time, the water pump 26 is started, and the magnetic suspension liquid in the storage tank 24 is transported to the atomizing nozzle 23 through the circulation connecting pipe 22, and then atomized and evenly sprayed on the surface of the component.

[0038] Defects on and near the surface of components can distort the magnetic field, causing leakage magnetic fields. Magnetic powder is attracted to these particles, forming magnetic traces. Operators observe these traces to determine the defects. After inspection, the power and water pump 26 are turned off, and the components are removed. If the magnetic suspension needs to be replaced, the reservoir 24 can be removed by rotating the regulator 252 in the reverse direction. The entire process integrates magnetization, magnetic powder spraying, and defect detection under single-handed operation, significantly improving inspection efficiency and accuracy.

Claims

1. A magnetic particle detector for non-destructive testing, comprising a handle (1), a magnetic particle spraying mechanism (2), a connecting and fixing mechanism (3) and a testing mechanism (4), characterized in that: The magnetic powder spraying mechanism (2) and the connecting and fixing mechanism (3) are fixedly connected to the outer surface of the handle (1), and the flaw detection mechanism (4) is fixedly connected to the bottom of the handle (1). The magnetic powder spraying mechanism (2) includes a placement slot (21) opened inside the handle (1). The magnetic powder spraying mechanism (2) includes a circulating connecting pipe (22) and an atomizing nozzle (23), wherein the atomizing nozzle (23) is uniformly and evenly fixedly connected to the outer surface of the circulating connecting pipe (22); The magnetic powder spraying mechanism (2) includes a liquid storage tank (24) fixedly connected inside the placement slot (21). A clamping assembly (25) is fixedly connected to the outer surface of the liquid storage tank (24). The liquid storage tank (24) is clamped and connected to the inside of the placement slot (21) by the clamping assembly (25). A water pump (26) is fixedly connected to one end of the liquid storage tank (24). One end of the circulation connecting pipe (22) is fixedly connected to the outer surface of the water pump (26), and the other end of the circulation connecting pipe (22) is fixedly connected to the other end of the liquid storage tank (24).

2. A magnetic particle testing instrument for non-destructive testing according to claim 1, characterized in that: The clamping assembly (25) includes a limiting ring (251) fixedly connected to both sides of the placement slot (21), and the liquid storage tank (24) is clamped inside the placement slot (21) by the limiting ring (251).

3. A magnetic particle testing instrument for non-destructive testing according to claim 2, characterized in that: The limiting ring (251) is threaded with an adjuster (252) on both sides. One end of the adjuster (252) is rotatably connected to a bearing (253). A clamping plate (254) is fixedly connected to the outer surface of the bearing (253). The adjuster (252) and the clamping plate (254) are symmetrically arranged inside the limiting ring (251).

4. A magnetic particle testing instrument for non-destructive testing according to claim 3, characterized in that: The limiting ring (251) and the clamping plate (254) are arranged at a distance of two equal parts on the outer surface of the handle (1), and the liquid storage tank (24) is clamped to the inside of the limiting ring (251) by the clamping plate (254).

5. A magnetic particle testing instrument for non-destructive testing according to claim 1, characterized in that: The connecting and fixing mechanism (3) includes a finger groove (31) opened on the inner top wall of the handle (1). The finger groove (31) is arranged in four equal parts on the inner top wall of the handle (1). A telescopic spring (32) is fixedly connected to the outer surface of the finger groove (31). The telescopic spring (32) is symmetrically arranged on both sides of the finger groove (31).

6. A magnetic particle testing instrument for non-destructive testing according to claim 5, characterized in that: A finger retaining ring (33) is fixedly connected to the bottom of the telescopic spring (32), and the finger retaining ring (33) and the telescopic spring (32) are arranged at a distance of four equal parts on the inner top wall of the handle (1).

7. A magnetic particle testing instrument for non-destructive testing according to claim 1, characterized in that: The flaw detection mechanism (4) includes a fixed electromagnetic chuck (41) fixedly connected to the bottom of the handle (1). Limiting members (42) are rotatably connected to both sides of the fixed electromagnetic chuck (41). A rotating electromagnetic chuck (43) is rotatably connected to the outer surface of the limiting member (42). The rotating electromagnetic chuck (43) is rotatably connected to the bottom of the fixed electromagnetic chuck (41) through the limiting member (42).

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