A probe fixing device for magnetic particle flaw detector

Abstract

The invention provides a probe fixing device of a magnetic particle flaw detector in the field of magnetic particle flaw detectors. The probe fixing device of the magnetic particle flaw detector is provided with a crossbeam frame, a moving block, a screw rod, a mounting cylinder connected to the moving block for mounting an annular probe, a rotating cylinder nested in the mounting cylinder, a nozzle installed in the rotating cylinder and distributed in a circumference, and an external magnetic suspension liquid supply mechanism. The moving block and the mounting cylinder drive the annular probe to move back and forth laterally to fully magnetize a workpiece, and at the same time drive the rotating cylinder and the nozzle to spray the magnetic suspension liquid circumferentially on the workpiece, so that the magnetic suspension liquid is evenly distributed on the workpiece, the operation is simple, the magnetic suspension liquid spraying uniformity is good, and the flaw detection efficiency is improved; by providing a rotating cylinder with an annular cavity and a lifting plate arranged in the annular cavity, the dripping magnetic suspension liquid is collected and lifted, so that the lifted magnetic suspension liquid flows to the workpiece again under the action of gravity and inertia, and the uniformity of magnetic suspension liquid coating is improved.

Description

Technical Field

[0001] The invention relates to the field of magnetic particle flaw detectors, and in particular to a probe fixing device of a magnetic particle flaw detector. Background Art

[0002] Magnetic particle detectors are suitable for wet magnetic particle detection of surface and near-surface cracks and minor defects caused by casting, quenching, machining, fatigue, etc. on various small and medium-sized parts such as crankshafts, camshafts, and spline shafts. When the workpiece is magnetized, if there is a defect on the workpiece surface, the magnetic resistance at the defect increases, resulting in leakage magnetic flux, forming a local magnetic field. The magnetic powder will then show the shape and position of the defect there, thereby determining the presence of the defect.

[0003] Magnetic particle flaw detectors can be equipped with four probe types: A, D, E, and O. 1. Horseshoe Probe (Type A): Suitable for inspecting various fillet welds and the internal and external corners of large workpieces. 2. Electromagnetic Yoke Probe (Type D): Equipped with a movable joint, it can inspect both curved and flat surfaces. 3. Rotating Magnetic Field Probe (Type E): Suitable for comprehensive flaw detection of various welds, curved and flat surfaces of various geometric shapes, and pressure vessels such as pipes, boilers, and spherical tanks, inspecting all defects and flaws on the workpiece surface. 4. Magnetic Ring Coil (Type O): Suitable for inspecting circumferential cracks on any workpiece that can fit within the coil. It is particularly convenient for detecting fatigue marks (fatigue marks are perpendicular to the axial direction) and can also be used for remote demagnetization of workpieces. Traditional magnetic particle flaw detectors require the use of a spraying agent, which requires frequent probe adjustments and repeated application of the agent, making operation cumbersome. Furthermore, a large amount of magnetic suspension is required.

[0004] The present application provides a magnetic ring and coil probe fixing device for a rod-shaped workpiece. Summary of the Invention

[0005] The purpose of this application is to solve the problem of cumbersome operation caused by the need for multiple adjustments and multiple spraying of traditional probes; compared with the existing technology, a probe fixing device for a magnetic particle flaw detector is provided, which can drive the probe to move and perform synchronous spraying operations at the same time, so that the magnetic suspension is evenly sprayed on the circumferential surface of the workpiece.

[0006] A probe fixing device for a magnetic particle flaw detector comprises a base and an annular probe; a crossbeam frame is fixedly connected to the base, a moving block slidably connected to the crossbeam frame is nested in the crossbeam frame, a screw threadedly connected to the moving block is provided in the crossbeam frame, and the screw is connected to a screw motor; a mounting cylinder is fixedly connected to the lower end of the moving block, a ring-shaped probe is nested and fixed on the left side of the mounting cylinder, and the annular probe is electrically connected to an external flaw detector through a cable; a rotating cylinder rotatably connected to the mounting cylinder is nested on the right side of the mounting cylinder, a plurality of groups of nozzles equidistantly distributed are provided on the inside of the rotating cylinder, and the nozzles are connected to a magnetic suspension liquid supply mechanism; a bevel gear ring is sleeved on the left side of the rotating cylinder, the bevel gear ring is meshed with a driving gear, the driving gear is fixedly connected to a transmission shaft extending above the mounting cylinder, the upper end of the transmission shaft is fixedly connected to a rolling gear, and the rolling gear is meshed with a rack plate fixedly connected to the crossbeam frame.

[0007] Furthermore, the magnetic suspension liquid supply mechanism includes a sleeve that is rotatably sleeved on the outside of the rotating cylinder and connected to the mounting cylinder, the nozzle extends to the outside of the rotating cylinder and is connected to the inner cavity of the sleeve; the sleeve is connected to a liquid inlet pipe, and the liquid inlet pipe is connected to an external magnetic suspension liquid extraction pump; the rotating cylinder is provided with an annular cavity, and the annular cavity is provided with a lifting plate that is spaced apart from the nozzle and equidistantly distributed around the circumference.

[0008] Preferably, the crossbeam frame is provided with a transverse groove for the moving block to slide transversely, the cross-section of the moving block is an inverted T-shape, and the moving block is provided with a threaded hole that cooperates with the screw rod; the screw rod is nested in the transverse groove, and the screw rod motor is fixed to the right side wall of the crossbeam frame by bolts.

[0009] Preferably, the mounting tube is a horizontally arranged cylinder with openings at both ends. A partition is provided in the middle of the mounting tube, and a left annular groove for installing an annular probe is provided on the left side of the partition. The annular probe is fixedly connected to the inner wall of the left annular groove by bolts.

[0010] Preferably, the mounting cylinder is provided with a right annular groove for nesting the rotating cylinder, and the rotating cylinder is rotatably connected to the right annular groove via a bearing sleeve. The rotating cylinder is a cylindrical structure with openings at both ends and arranged horizontally.

[0011] Preferably, the rotating cylinder is provided with an accommodating cavity for accommodating the driving gear and the transmission shaft above the right annular groove, and the transmission shaft is vertically arranged and rotatably connected to the mounting cylinder.

[0012] Preferably, the rotating cylinder is provided with a group of symmetrically arranged raised rings located inside the sleeve and rotatably connected to the sleeve, the sleeve is provided with an annular groove matching the raised rings, and the sleeve is fixedly connected to the mounting cylinder through a fixing frame.

[0013] Preferably, the annular cavity is formed by end plates integrally formed with the rotating cylinder and arranged at the openings on both sides of the rotating cylinder, and the inner wall of the inner cavity of the rotating cylinder.

[0014] Preferably, the lifting plate is arranged parallel to the rotating cylinder and divides the annular cavity into a plurality of independent fan-shaped cavities.

[0015] Preferably, collecting grooves are provided on both side end faces of the lifting plate. The collecting grooves are trapezoidal grooves, and their inner ends extend to the inner end faces of the lifting plate to form flow outlets. The collecting grooves are provided with blocking bars near the flow outlets, and the height of the blocking bars is less than the depth of the collecting grooves.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The present invention is provided with a crossbeam frame, a moving block, a screw rod, a mounting cylinder connected to the moving block for mounting an annular probe, a rotating cylinder nested in the mounting cylinder, a nozzle installed in the rotating cylinder and distributed in a circumferential manner, and an external magnetic suspension liquid supply mechanism. The moving block and the mounting cylinder drive the annular probe to move back and forth laterally to fully magnetize the workpiece, and at the same time drive the rotating cylinder and the nozzle to spray the magnetic suspension liquid circumferentially on the workpiece, so that the magnetic suspension liquid is evenly distributed on the workpiece. The operation is simple, the magnetic suspension liquid spraying is uniform, and the flaw detection efficiency is improved.

[0018] (2) The present invention realizes rotational spraying of the workpiece by providing a rotating cylinder and a sleeve rotatably sleeved on the outside of the rotating cylinder, thereby ensuring uniformity of spraying.

[0019] (3) The present invention is provided with a rotating cylinder with an annular cavity and a lifting plate arranged in the annular cavity, so as to collect and lift the dripping magnetic suspension, so that the lifted magnetic suspension flows toward the workpiece again under the action of gravity and inertia, thereby saving the amount of magnetic suspension and improving the uniformity of magnetic suspension application.

[0020] (4) The present invention improves the lifting effect of the magnetic suspension, ensures that the magnetic suspension flows out at a high place, and ensures that the magnetic suspension is poured on the workpiece by providing a lifting plate with a collecting groove, a collecting groove with a trapezoidal cross-section and an inner opening extending to the inner end surface of the lifting plate, and a blocking bar provided at the outflow port of the collecting groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention from the right side perspective;

[0022] Figure 2 is a schematic diagram of the three-dimensional structure of the present invention from a rear side perspective;

[0023] Figure 3 It is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the assembly structure of the installation cylinder in the present invention;

[0025] Figure 5 It is a schematic diagram of the transverse cross-sectional structure of the installation cylinder in the present invention;

[0026] Figure 6 This is a schematic diagram of the explosion structure of the installation tube in the present invention;

[0027] Figure 7 Schematic diagram of the three-dimensional structure of the ring probe in the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the installation cylinder in the present invention;

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the rotating drum in the present invention;

[0030] Figure 10 It is a horizontal cross-sectional structural schematic diagram of the rotating drum in the present invention.

[0031] Explanation of the numbers in the figure: 1. Base; 2. Crossbeam; 3. Moving block; 4. Mounting cylinder; 5. Annular probe; 6. Screw; 7. Screw motor; 8. Rotating cylinder; 801. End plate; 802. Annular cavity; 9. Nozzle; 10. Sleeve; 11. Liquid inlet pipe; 12. Fixed frame; 13. Bevel gear ring; 14. Drive gear; 15. Transmission shaft; 16. Rolling gear; 17. Rack plate; 18. Lifting plate; 1801. Collecting trough; 1802. Blocking bar. Implementation Method

[0032] The embodiments will be combined with the drawings in the specification to clearly and completely describe the technical solution of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of this application. Example

[0033] The present invention provides a probe fixing device for a magnetic particle flaw detector, please refer to Figure 1-10 , including a base 1 and an annular probe 5; a crossbeam 2 is fixedly connected to the base 1, a moving block 3 slidably connected to the crossbeam 2 is nested in the crossbeam 2, a screw 6 threadedly connected to the moving block 3 is provided in the crossbeam 2, and the screw 6 is connected to a screw motor 7; the lower end of the moving block 3 is fixedly connected to the mounting cylinder 4, and a ring probe 5 is nested and fixed on the left side of the mounting cylinder 4, and the annular probe 5 is electrically connected to the external flaw detector through a cable; a rotating cylinder 8 rotatably connected to the mounting cylinder 4 is nested on the right side of the mounting cylinder 4, and a plurality of groups of nozzles 9 equidistantly distributed are provided on the inside of the rotating cylinder 8, and the nozzles 9 are connected to a magnetic suspension liquid supply mechanism; a bevel gear ring 13 is sleeved on the left side of the rotating cylinder 8, and the bevel gear ring 13 is engaged with a driving gear 14, and the driving gear 14 is fixedly connected to a transmission shaft 15 extending above the mounting cylinder 4, and the upper end of the transmission shaft 15 is fixedly connected to a rolling gear 16, and the rolling gear 16 is engaged with a rack plate 17 fixedly connected to the crossbeam 2.

[0034] Specifically, when performing flaw detection, the rod-shaped workpiece is inserted into the mounting tube 4 and its two ends are clamped and fixed, and the external flaw detector, the magnetic suspension liquid supply mechanism and the screw motor 7 are started; the screw motor 7 drives the screw 6 to rotate, and the screw 6 drives the moving block 3 to move back and forth laterally along the crossbeam frame 2, and the moving block 3 drives the mounting tube 4 and the annular probe 5 installed inside thereof to make horizontal reciprocating movements; at the same time, the external magnetic suspension liquid supply mechanism injects the magnetic separation liquid into the nozzle 9 and sprays it out. During the spraying process, since the rolling gear 16 rolls on the rack plate 17, the rolling gear 16 drives the driving gear 14 to rotate through the transmission shaft 15, and the driving gear 14 drives the bevel gear ring 13 to rotate, and the bevel gear ring 13 drives the rotating tube 8 to rotate, and the rotating tube 8 drives the nozzle 9 to make a circular motion on the outside of the workpiece, and the magnetic suspension is evenly sprayed on the circumferential surface of the workpiece, ensuring sufficient contact between the magnetic suspension and the workpiece surface, ensuring the magnetic trace display effect, and ensuring the flaw detection effect.

[0035] In this embodiment, the crossbeam frame 2 is provided with a transverse sliding groove for the moving block 3 to slide horizontally. The cross-section of the moving block 3 is an inverted T-shape, and a threaded hole is provided on the moving block 3 to cooperate with the screw rod 6; the screw rod 6 is nested in the transverse sliding groove, and the screw motor 7 is fixed to the right side wall of the crossbeam frame 2 by bolts.

[0036] Specifically, the moving block 3 is driven by the screw rod 6 to move the mounting cylinder 4, thereby realizing the transverse reciprocating movement of the annular probe 5 to magnetize the entire workpiece.

[0037] In this embodiment, the mounting tube 4 is a horizontally arranged cylinder with openings at both ends. A partition is provided in the middle of the mounting tube 4. A left annular groove for installing the annular probe 5 is provided on the left side of the partition. The annular probe 5 is fixedly connected to the inner wall of the left annular groove by bolts.

[0038] In this embodiment, the mounting cylinder 4 is provided with a right annular groove for nesting the rotating cylinder 8. The rotating cylinder 8 is rotatably connected to the right annular groove via a bearing sleeve. The rotating cylinder 8 is a cylindrical structure with both ends open and arranged horizontally.

[0039] Specifically, it is convenient for the workpiece to pass through the annular probe 5 and the rotating cylinder 8, and convenient for magnetization and spraying of magnetic suspension liquid on the workpiece.

[0040] In this embodiment, the rotating cylinder 8 is provided with an accommodating cavity for accommodating the driving gear 14 and the transmission shaft 15 above the right annular groove. The transmission shaft 15 is vertically arranged and rotatably connected to the mounting cylinder 4 .

[0041] Specifically, while the screw rod 6 drives the moving block 3 , the rolling gear 16 rolls on the rack plate 17 to realize the circular motion of the rotating cylinder 8 . Example

[0042] The present invention provides a probe fixing device for a magnetic particle flaw detector, please refer to Figure 4-10 The magnetic suspension liquid supply mechanism includes a sleeve 10 that is rotatably sleeved on the outside of the rotating cylinder 8 and connected to the mounting cylinder 4. The nozzle 9 extends to the outside of the rotating cylinder 8 and is connected to the inner cavity of the sleeve 10; the sleeve 10 is connected to a liquid inlet pipe 11, which is connected to an external magnetic suspension extraction pump.

[0043] Specifically, when supplying magnetic liquid, the external magnetic liquid extraction pump injects the magnetic liquid into the sleeve 10 through the liquid inlet pipe 11, and the magnetic liquid in the sleeve 10 is ejected through the nozzle 9. The magnetic liquid is injected into the nozzle 9 and ejected without affecting the rotation of the rotating cylinder 8.

[0044] In this embodiment, the rotating cylinder 8 is located inside the sleeve 10 and is provided with a group of symmetrically arranged raised rings that are rotatably connected to the sleeve 10. The sleeve 10 is provided with an annular groove that cooperates with the raised rings. The sleeve 10 is fixedly connected to the mounting cylinder 4 through a fixing frame 12.

[0045] Specifically, the stability and sealing of the connection between the sleeve 10 and the rotating drum 8 are ensured.

[0046] In this embodiment, the rotating cylinder 8 is provided with an annular cavity 802 , and the annular cavity 802 is provided with lifting plates 18 spaced apart from the nozzle 9 and distributed equidistantly around the circumference.

[0047] Specifically, when spraying the magnetic suspension, the dripping magnetic suspension drips into the annular cavity 802 under the action of gravity. As the rotating cylinder 8 rotates, the lifting plate 18 performing a circular motion lifts the magnetic suspension to a high place and then flows to the surface of the workpiece under the action of gravity and inertia, realizing the secondary coating of the magnetic suspension, saving the magnetic suspension, and improving the magnetic suspension coating effect.

[0048] In this embodiment, the annular cavity 802 is formed by the end plates 801 integrally formed with the rotating cylinder 8 and located at the openings on both sides of the rotating cylinder 8 , and the inner wall of the inner cavity of the rotating cylinder 8 .

[0049] In this embodiment, the lifting plate 18 is arranged parallel to the rotating cylinder 8 and divides the annular cavity 802 into a plurality of independent sector-shaped cavities.

[0050] Specifically, the lifting plate 18 is improved to lift the magnetic suspension uniformly.

[0051] In this embodiment, collecting grooves 1801 are provided on the end faces on both sides of the lifting plate 18. The collecting grooves 1801 are trapezoidal grooves, and their inner ends extend to the inner end faces of the lifting plate 18 to form a flow outlet. The collecting grooves 1801 are provided with blocking bars 1802 near the flow outlet, and the height of the blocking bars 1802 is less than the depth of the collecting grooves 1801.

[0052] Specifically, when the lifting plate 18 makes a circular motion, the collecting groove 1801 rotates and lifts the magnetic suspension. At the same time, the blocking bar 1802 prevents the magnetic suspension from flowing out of the collecting groove 1801 too early, causing the lifting height to be insufficient and unable to contact the workpiece after flowing out.

[0053] The above description is only a preferred embodiment of the present invention; however, the protection scope of the present invention is not limited thereto.

Claims

1. A probe fixing device for a magnetic particle flaw detector, characterized in that: The invention comprises a base (1) and an annular probe (5); the base (1) is fixedly connected to a crossbeam frame (2); a moving block (3) slidably connected to the crossbeam frame (2) is nested in the crossbeam frame (2); a screw (6) threadedly connected to the moving block (3) is provided in the crossbeam frame (2); the screw (6) is connected to a screw motor (7); a mounting tube (4) is fixedly connected to the lower end of the moving block (3); an annular probe (5) is nested and fixed on the left side of the mounting tube (4); the annular probe (5) is electrically connected to an external flaw detector via a cable; a screw (6) threadedly connected to the moving block (3) is nested in the right side of the mounting tube (4); A rotating cylinder (8) rotatably connected to the mounting cylinder (4), a plurality of nozzles (9) equidistantly arranged inside the rotating cylinder (8), the nozzles (9) being connected to a magnetic suspension liquid supply mechanism; a bevel gear ring (13) is sleeved on the left side of the rotating cylinder (8), the bevel gear ring (13) is meshed with a driving gear (14), the driving gear (14) is fixedly connected to a transmission shaft (15) extending above the mounting cylinder (4), the upper end of the transmission shaft (15) is fixedly connected to a rolling gear (16), the rolling gear (16) is meshed with a rack plate (17) fixedly connected to the crossbeam frame (2); The magnetic suspension liquid supply mechanism comprises a sleeve (10) rotatably sleeved on the outside of a rotating cylinder (8) and connected to a mounting cylinder (4); a nozzle (9) extending to the outside of the rotating cylinder (8) and communicating with an inner cavity of the sleeve (10); a liquid inlet pipe (11) communicating with the sleeve (10), and the liquid inlet pipe (11) communicating with an external magnetic suspension liquid extraction pump; an annular cavity (802) is provided in the rotating cylinder (8), and lifting plates (18) are provided in the annular cavity (802) and are spaced apart from the nozzle (9) and equidistantly distributed around the circumference.

2. The probe fixing device of a magnetic particle flaw detector according to claim 1 is characterized in that: The cross beam frame (2) is provided with a transverse sliding groove for the moving block (3) to slide transversely; the moving block (3) has an inverted T-shaped cross section; the moving block (3) is provided with a threaded hole that cooperates with the screw rod (6); the screw rod (6) is nested in the transverse sliding groove; and the screw rod motor (7) is fixed to the right side wall of the cross beam frame (2) by means of bolts.

3. The probe fixing device of a magnetic particle flaw detector according to claim 1, characterized in that: The mounting tube (4) is a horizontally arranged cylinder with openings at both ends. A partition is provided in the middle of the mounting tube (4). A left annular groove for mounting an annular probe (5) is provided on the left side of the partition. The annular probe (5) is fixedly connected to the inner wall of the left annular groove by means of bolts.

4. The probe fixing device of a magnetic particle flaw detector according to claim 3 is characterized in that: The mounting cylinder (4) is provided with a right annular groove for nesting the rotating cylinder (8), and the rotating cylinder (8) is rotatably connected to the right annular groove via a bearing sleeve. The rotating cylinder (8) is a cylindrical structure with openings at both ends and arranged horizontally.

5. The probe fixing device of a magnetic particle flaw detector according to claim 4, characterized in that: The rotating cylinder (8) is provided with a receiving cavity for receiving a driving gear (14) and a transmission shaft (15) located above the right annular groove. The transmission shaft (15) is vertically arranged and rotatably connected to the mounting cylinder (4).

6. The probe fixing device of a magnetic particle flaw detector according to claim 1, characterized in that: The rotating cylinder (8) is provided with a group of symmetrically arranged raised rings located inside the sleeve (10) and rotatably connected to the sleeve (10); the sleeve (10) is provided with an annular groove that cooperates with the raised rings; and the sleeve (10) is fixedly connected to the mounting cylinder (4) via a fixing frame (12).

7. The probe fixing device of a magnetic particle flaw detector according to claim 1, characterized in that: The annular cavity (802) is formed by enclosing end plates (801) formed integrally with the rotating cylinder (8) and arranged at openings on both sides of the rotating cylinder (8) and the inner wall of the inner cavity of the rotating cylinder (8).

8. The probe fixing device of a magnetic particle flaw detector according to claim 1, characterized in that: The lifting plate (18) is arranged parallel to the rotating cylinder (8) and divides the annular cavity (802) into a plurality of independent sector-shaped cavities.

9. The probe fixing device of a magnetic particle flaw detector according to claim 8, characterized in that: The lifting plate (18) is provided with a collecting groove (1801) on both side end surfaces. The collecting groove (1801) is a trapezoidal groove, the inner end of which extends to the inner end surface of the lifting plate (18) to form a flow outlet. The collecting groove (1801) is provided with a blocking bar (1802) near the flow outlet, and the height of the blocking bar (1802) is less than the depth of the collecting groove (1801).

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