Stirring and spraying device of magnetic particle flaw detector

Abstract

The utility model relates to the related technical field of ultrasonic camera shooting, in particular to a stirring and spraying device of a magnetic particle flaw detector, which comprises a bottom plate, a stirring device is arranged in a liquid storage tank, and a spraying device is arranged on one side of the liquid storage tank. According to the stirring and spraying device of the magnetic powder flaw detector, when the spraying device is started to work, an operator firstly mixes magnetic powder and a dispersing agent according to a proportion and pours the mixture into the liquid storage tank, the stirring device is started to enable the magnetic powder to suspend uniformly, then an external control system starts the self-priming pump, and magnetic powder suspension liquid is conveyed to the spraying pipe through the liquid outlet pipe, the first conveying pipe and the second conveying pipe in sequence; if the spraying height needs to be adjusted to adapt to different workpiece sizes, a second conveying pipe and a telescopic spring are pulled to enable a positioning rod to be disengaged, reset and locked in height, then a control system starts a second motor, a spraying pipe and a spraying head are driven to rotate through transmission of a transmission shaft and a gear, the spraying head sprays mist, and by means of multi-angle rotation and height adjustment, the spraying height can be adjusted. The magnetic powder can uniformly cover the surfaces of various workpieces, so that accurate flaw detection is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of magnetic particle flaw detector, especially to a magnetic particle flaw detector stirring and spraying device. BACKGROUND

[0002] The magnetic particle flaw detector is a professional equipment for nondestructive testing, which is widely used in industrial fields, especially in mechanical manufacturing, aerospace, railway transportation and other industries. Its working principle is based on magnetic principle. When the workpiece to be detected is magnetized, if there are cracks, pores, inclusions and other defects in the workpiece, the magnetic permeability of these parts will be different from that of the intact part, which will cause the magnetic force line to be distorted. At this time, the magnetic powder is uniformly sprayed on the surface of the workpiece, and the magnetic powder will gather at the distorted magnetic force line to form visible magnetic marks, thereby directly showing the position, shape and approximate size of the defects. From the structural composition, it usually includes a magnetizing power supply for providing strong and stable magnetizing current to ensure that the workpiece can be fully magnetized, and a magnetizing coil or a magnetic yoke, which is a key component for generating a magnetic field. The appropriate magnetization mode can be flexibly selected according to the shape and size of the workpiece. In addition, the magnetic powder spraying device can uniformly and accurately sprinkle the magnetic powder, and the observation lighting system can help the operator clearly view the magnetic marks and accurately judge the defect condition, which plays a key role in ensuring the quality of the workpiece and preventing potential safety hazards. Therefore, a magnetic particle flaw detector stirring and spraying device is particularly needed.

[0003] However, the traditional magnetic particle flaw detector stirring and spraying device cannot perform omnidirectional spraying. Due to the limited spraying angle, it is difficult for the magnetic powder to uniformly cover all parts of the workpiece with complex shape, irregular curved surface or internal cavity structure, such as mechanical parts with deep holes, threads and corners, so that the defects in some areas cannot be accurately detected due to insufficient magnetic powder adhesion, greatly increasing the risk of missed detection and hiding potential problems in product quality. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a magnetic particle flaw detector stirring and spraying device to solve the problem of the existing magnetic particle flaw detector stirring and spraying device mentioned in the background art, which cannot perform omnidirectional spraying due to the limited spraying angle. It is difficult for the magnetic powder to uniformly cover all parts of the workpiece with complex shape, irregular curved surface or internal cavity structure, such as mechanical parts with deep holes, threads and corners, so that the defects in some areas cannot be accurately detected due to insufficient magnetic powder adhesion, greatly increasing the risk of missed detection and hiding potential problems in product quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stirring and spraying device for a magnetic particle flaw detector, comprising a base plate, universal wheels installed at the bottom of the base plate, a push rod fixedly connected to the top of one end of the base plate, a liquid storage tank placed on top of the base plate, a stirring device installed inside the liquid storage tank, and a spraying device installed on one side of the liquid storage tank;

[0006] The spraying device includes a liquid outlet pipe, a self-priming pump, a first delivery pipe, a second delivery pipe, a fixing hole, a telescopic spring, a stop block, a positioning rod, a positioning hole, a fixing plate, a second motor, a drive shaft, a first gear, a second gear, a spray pipe, and a nozzle. A liquid outlet pipe is connected to one side of the storage tank. A self-priming pump is installed at one end of the liquid outlet pipe. The first delivery pipe is connected internally to the self-priming pump. A second delivery pipe is slidably connected internally to the first delivery pipe. A fixing hole is formed on the surface of the first delivery pipe. A telescopic spring is fixedly connected to the outer side of the fixing hole. A stop block is fixedly connected to one end of the telescopic spring. A positioning rod is fixedly connected to the inner side of the stop block. A positioning hole is formed on the outer wall surface of the second delivery pipe. A fixing plate is fixedly connected to one side of the second delivery pipe. A second motor is fixedly connected above the fixing plate. A drive shaft is fixedly connected to the output end of the second motor. A first gear is fixedly connected to one end of the drive shaft. A second gear meshes with the outer wall surface of the first gear. The second gear rotates at the top of the second delivery pipe. A spray pipe is fixedly connected to the upper surface of the second gear. A nozzle is installed at the bottom of the spray pipe.

[0007] Preferably, multiple sets of the casters are provided at the bottom of the base plate, and are symmetrically arranged at the four corners of the base plate with respect to the central axis of the base plate.

[0008] Preferably, the stirring device includes a motor housing, a first motor, a rotating shaft, a stirring shaft, a stirring rod, a connecting rod, a brush holder, and a brush. The motor housing is fixedly connected to the top of the liquid storage tank. The first motor is fixedly connected inside the motor housing. The output end of the first motor is fixedly connected to the rotating shaft. One end of the rotating shaft is fixedly connected to the stirring shaft. The stirring rod is fixedly connected to the surface of the stirring shaft. The connecting rod is fixedly connected to the outer side of the bottom end of the stirring shaft. One end of the connecting rod is fixedly connected to the brush holder. A brush is installed at the bottom of the brush holder.

[0009] Preferably, the rotating shaft is configured to rotate in conjunction with the stirring shaft via a first motor, and multiple sets of stirring rods are provided on the surface of the stirring shaft.

[0010] Preferably, multiple sets of brush holders and brushes are provided at the bottom of the stirring shaft, and they are evenly spaced around the outer wall surface of the bottom of the stirring shaft with respect to the center of the stirring shaft.

[0011] Preferably, the stop block and the positioning rod form a telescopic structure through a telescopic spring.

[0012] Preferably, the positioning holes are distributed in multiple groups on the surface of the second conveying pipe at equal intervals, and the outer wall size of the positioning rod is consistent with the inner wall size of the fixing hole and the positioning hole.

[0013] Compared with the prior art, the magnetic particle flaw detector stirring and spraying device has the advantages that when the spraying device needs to be started for magnetic powder spraying operation, the operator first mixes the magnetic powder with the appropriate amount of dispersing agent according to the specified proportion and pours it into the liquid storage tank, then starts the stirring device to make the magnetic powder uniformly suspended in the liquid, after preparation, the external control system sends a start instruction to the self-priming pump, the self-priming pump is powered on and runs, the uniformly mixed magnetic powder suspension in the liquid storage tank is sucked through the liquid outlet pipe, and then sequentially conveyed to the spraying pipe through the first conveying pipe and the second conveying pipe, at this time, if the spraying height needs to be adjusted to adapt to workpieces of different sizes, the operator only needs to pull the second conveying pipe to make it slide in the first conveying pipe, the telescopic spring is stretched under stress, the positioning rod on the stop block is pulled out of the fixing hole of the first conveying pipe, when the height is adjusted to the appropriate height, the positioning rod is accurately inserted into the corresponding positioning hole in the outer wall of the second conveying pipe under the rebound action of the telescopic spring, rapid and stable height positioning is realized, the spraying range covers the key parts of the workpiece, then the control system starts the second motor, the output end of the second motor drives the transmission shaft to rotate, the first gear fixed at one end of the transmission shaft rotates synchronously, since the first gear and the second gear are meshed with each other, the second gear rotates at high speed at the top end of the second conveying pipe, drives the spraying pipe and the nozzle at the bottom to rotate together, in the rotating process, the nozzle uniformly sprays the magnetic powder suspension in the form of mist, thanks to the multi-angle rotation of the nozzle and the flexible adjustment of the spraying height, whether it is a planar workpiece or an irregular workpiece with complex shape, deep hole, thread, corner and other structures, the magnetic powder can be uniformly and fully covered on the surface of the workpiece, so that the magnetic powder is accurately adsorbed on the magnetic force line distortion caused by defects on the surface of the workpiece, clear magnetic marks are formed, which provides a reliable basis for subsequent accurate judgment of the quality of the workpiece, and effectively solves the many drawbacks of the traditional spraying device. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an appearance side view structure schematic diagram of the utility model;

[0015] Figure 2 It is a stirring device structure schematic diagram of the utility model;

[0016] Figure 3 It is a spraying device structure schematic diagram of the utility model;

[0017] Figure 4The first gear and the second gear are matched with each other.

[0018] Figure 5 The utility model discloses Figure 3 The enlarged structural schematic diagram of A in the middle.

[0019] In the drawing: 1, bottom plate;2, universal wheel;3, push rod;4, liquid storage tank;5, stirring device;501, motor shell;502, first motor;503, rotating shaft;504, stirring shaft;505, stirring rod;506, connecting rod;507, brush holder;508, brush;6, spraying device;601, liquid outlet pipe;602, self-priming pump;603, first conveying pipe;604, second conveying pipe;605, fixing hole;606, extension spring;607, stop block;608, positioning rod;609, positioning hole;610, fixed plate;611, second motor;612, transmission shaft;613, first gear;614, second gear;615, spraying pipe;616, spray head. Specific embodiments

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a magnetic particle flaw detector stirring spraying device, including bottom plate 1, the bottom of bottom plate 1 is equipped with universal wheel 2, the top of one end of bottom plate 1 is fixedly connected with push rod 3, the top of bottom plate 1 is placed with liquid storage tank 4, stirring device 5 is arranged in the inside of liquid storage tank 4, spraying device 6 is provided on the side of liquid storage tank 4;

[0022] The spraying device 6 comprises a liquid outlet pipe 601, a self-priming pump 602, a first conveying pipe 603, a second conveying pipe 604, a fixing hole 605, an extension spring 606, a stop block 607, a positioning rod 608, a positioning hole 609, a fixed plate 610, a second motor 611, a transmission shaft 612, a first gear 613, a second gear 614, a spraying pipe 615 and a spray head 616, one side of the liquid storage tank 4 is connected with the liquid outlet pipe 601, one end of the liquid outlet pipe 601 is provided with the self-priming pump 602, the inside of the self-priming pump 602 is connected with the first conveying pipe 603, the inside of the first conveying pipe 603 is slidably connected with the second conveying pipe 604, the surface of the first conveying pipe 603 is provided with the fixing hole 605, the outer side of the fixing hole 605 is fixedly connected with the extension spring 606, one end of the extension spring 606 is fixedly connected with the stop block 607, the inner side of the stop block 607 is fixedly connected with the positioning rod 608, the outer wall surface of the second conveying pipe 604 is provided with the positioning hole 609, one side of the second conveying pipe 604 is fixedly connected with the fixed plate 610, the upper side of the fixed plate 610 is fixedly connected with the second motor 611, the output end of the second motor 611 is fixedly connected with the transmission shaft 612, one end of the transmission shaft 612 is fixedly connected with the first gear 613, the outer wall surface of the first gear 613 is meshed with the second gear 614, the second gear 614 rotates at the top end of the second conveying pipe 604, the upper surface of the second gear 614 is fixedly connected with the spraying pipe 615, and the bottom of the spraying pipe 615 is provided with the spray head 616. Through the arrangement of the spraying device 6, when the spraying device 6 needs to be started to perform the magnetic powder spraying operation, the operator first pours the magnetic powder mixed with the dispersing agent in a specified proportion into the liquid storage tank 4, then starts the stirring device 5 to make the magnetic powder uniformly suspended in the liquid, after preparation, the external control system sends a starting instruction to the self-priming pump 602, the self-priming pump 602 is powered on and runs, the mixed uniform magnetic powder suspension in the liquid storage tank 4 is sucked in through the liquid outlet pipe 601 by the suction force of the self-priming pump 602, and then is sequentially conveyed to the spraying pipe 615 through the first conveying pipe 603 and the second conveying pipe 604. At this time, if the spraying height needs to be adjusted to adapt to workpieces of different sizes, the operator only needs to pull the second conveying pipe 604 to make it slide in the first conveying pipe 603, the extension spring 606 is stretched under the action of force, the positioning rod 608 on the stop block 607 is separated from the fixing hole 605 of the first conveying pipe 603, when the height is adjusted to the appropriate height, the positioning rod 608 is accurately inserted into the corresponding positioning hole 609 in the outer wall of the second conveying pipe 604 under the rebound action of the extension spring 606, the height is quickly and stably positioned, the spraying range covers the key parts of the workpiece, then the control system starts the second motor 611, the output end of the second motor 611 drives the transmission shaft 612 to rotate, the first gear 613 fixed at one end of the transmission shaft 612 rotates synchronously, since the first gear 613 and the second gear 614 are meshed with each other, the second gear 614 rotates at high speed at the top end of the second conveying pipe 604, drives the spraying pipe 615 and the spray head 616 at the bottom to rotate together, in the rotating process,The spray head 616 sprays the magnetic powder suspension in a mist form. With the multi-angle rotation of the spray head 616 and the flexible adjustment of the spraying height, the magnetic powder can uniformly cover the surface of the workpiece in all directions, whether the workpiece is a flat workpiece or an irregular workpiece with complex shapes, deep holes, threads, corners and the like. The magnetic powder is accurately adsorbed at the magnetic force line distortion caused by defects on the surface of the workpiece, forming clear magnetic marks, providing a reliable basis for subsequent accurate judgment of the quality of the workpiece, and effectively solving the many drawbacks of the traditional spraying device 6.

[0023] Further, the plurality of universal wheels 2 are arranged at the bottom of the bottom plate 1 and symmetrically arranged at the four corners of the bottom plate 1 with the central axis of the bottom plate 1 as the center. With the arrangement of the universal wheels 2, in the flaw detection workshop, in the face of detection requirements of different workstations, the operator only needs to gently push the push rod 3, and with the flexible steering function of the plurality of universal wheels 2, the device can smoothly and unobstructedly move on the ground, quickly reach the designated location, without consuming a lot of manpower to carry heavy equipment, greatly saving physical strength and time cost.

[0024] Further, the stirring device 5 includes a motor shell 501, a first motor 502, a rotating shaft 503, a stirring shaft 504, a stirring rod 505, a connecting rod 506, a brush holder 507 and a brush 508. The upper portion of the liquid storage tank 4 is fixedly connected with the motor shell 501. The inside of the motor shell 501 is fixedly connected with the first motor 502. The output end of the first motor 502 is fixedly connected with the rotating shaft 503. One end of the rotating shaft 503 is fixedly connected with the stirring shaft 504. The surface of the stirring shaft 504 is fixedly connected with the stirring rod 505. The bottom end of the stirring shaft 504 is fixedly connected with the connecting rod 506. One end of the connecting rod 506 is fixedly connected with the brush holder 507. The bottom portion of the brush holder 507 is installed with the brush 508. When the magnetic powder suspension needs to be prepared, the operator pours the magnetic powder and the dispersing agent into the liquid storage tank 4 according to the proportion, and then starts the stirring device 5. The first motor 502 in the motor shell 501 starts to operate according to the external control system instruction. The output end of the first motor 502 drives the rotating shaft 503 to rotate at a high speed, and then drives the stirring shaft 504 to rotate. The stirring rod 505 fixed to the surface of the stirring shaft 504 rotates with the stirring shaft 504, and strongly stirs the liquid in the liquid storage tank 4, so that the magnetic powder particles are rapidly dispersed in the dispersing agent, avoiding the agglomeration and deposition of the magnetic powder, ensuring the uniform distribution of the magnetic powder, and achieving the ideal flaw detection effect. At the same time, the connecting rod 506 at the bottom end of the stirring shaft 504 drives the brush holder 507 and the brush 508 at the bottom to rotate synchronously. The brush 508 tightly brushes the bottom and the inner wall of the liquid storage tank 4 during the rotation. On the one hand, it can effectively remove the residual impurities attached to the tank wall due to the deposition or chemical reaction of the magnetic powder, preventing the impurities from mixing into the magnetic powder suspension and affecting the flaw detection accuracy. On the other hand, the continuous brushing action can further promote the mixing of the magnetic powder and the dispersing agent, making the uniformity of the magnetic powder suspension better, and laying a solid foundation for the subsequent accurate and efficient spraying flaw detection operation.

[0025] Further, the rotating shaft 503 cooperates with the stirring shaft 504 through the first motor 502 to form a rotating structure, and the stirring rods 505 are arranged on the surface of the stirring shaft 504. Through the arrangement of the stirring rods 505, the stirring efficiency and uniformity of the magnetic powder suspension are greatly enhanced. When the first motor 502 drives the rotating shaft 503 to drive the stirring shaft 504 to rotate, the multiple stirring rods 505 cut into the mixed solution of the magnetic powder and the dispersant from different angles like high-speed rotating paddles, create complex turbulence, and break the possible agglomeration between the magnetic powder particles, so that the magnetic powder is more quickly and uniformly dispersed in the liquid. Compared with a single or small amount of stirring rods, the ideal mixing effect can be achieved in a shorter time, and the magnetic powder suspension with stable quality is provided for subsequent flaw detection work.

[0026] Further, the brush holders 507 and the brushes 508 are arranged in multiple groups at the bottom of the stirring shaft 504 and are arranged at equal intervals around the outer wall surface of the bottom of the stirring shaft 504 with the center of the stirring shaft 504 as the center. Through the arrangement of the brush holders 507 and the brushes 508, on the one hand, the bottom and the inner wall of the liquid storage tank 4 are cleaned in all directions. During the stirring process, the multiple brushes 508 rotate synchronously, and the bottom and the inner wall are washed without dead angles, so that any residual impurities in the corners can be removed in time, and the accumulation of impurities is avoided to affect the purity of the magnetic powder suspension. On the other hand, the uniform distribution design makes the washing force uniformly act on the tank wall, prevents the tank 4 from being worn due to uneven local stress, prolongs the service life of the equipment, and continuously washes the magnetic powder and the dispersant to mix deeply, thereby ensuring the flaw detection precision.

[0027] Further, the stop block 607 cooperates with the positioning rod 608 to form a telescopic structure through the telescopic spring 606, and the positioning rod 608 slides in the fixed hole 605. Through the arrangement of the telescopic spring 606, the stop block 607 and the positioning rod 608, a convenient and stable locking mechanism is provided for height adjustment of the second conveying pipe 604. When the spraying height needs to be adjusted, the second conveying pipe 604 is pulled, the telescopic spring 606 is stretched, the positioning rod 608 is pulled out of the fixed hole 605, and after adjustment, the telescopic spring 606 rebounds to push the positioning rod 608 to accurately insert into the fixed hole 605 or the corresponding positioning hole 609, so that the position of the second conveying pipe 604 is quickly fixed. The operation is simple and efficient, and during the flaw detection operation, the interference such as vibration can be effectively resisted to ensure that the spraying height is stable and unchanged.

[0028] Further, the positioning holes 609 are distributed in multiple groups at equal intervals on the surface of the second conveying pipe 604, the outer wall size of the positioning rod 608 matches the inner wall size of the fixing hole 605 and the positioning hole 609, and through the arrangement of the fixing hole 605, the positioning rod 608 and the positioning hole 609, fine adjustment and accurate positioning of the spraying height are realized. Multiple groups of positioning holes 609 give the operator rich choices, and the second conveying pipe 604 can be accurately adjusted in length according to different workpiece heights and shapes, so that the spray head 616 is in the best spraying position. The close size design ensures the stability after adjustment, eliminates the influence of height loosening change on the spraying effect, and ensures the smooth progress of the flaw detection operation.

[0029] Working principle: in the magnetic particle flaw detection workshop, when receiving a batch of workpieces to be detected, the operator first accurately allocates the ratio of magnetic powder and dispersing agent according to the material of the workpiece, the estimated defect type and other factors, then pours them into the liquid storage tank 4, at this time, the first motor 502 in the motor shell 501 above the liquid storage tank 4 starts, drives the rotating shaft 503 to rotate at high speed, and then drives the stirring shaft 504 to rotate, a plurality of stirring rods 505 like nimble stirring paddles cut into the mixed liquid from all directions, break the magnetic powder agglomeration, make it uniformly dispersed, at the same time, the connecting rod 506 at the bottom of the stirring shaft 504 drives a plurality of brush holders 507 and brushes 508 to rotate synchronously, without dead angle, washes the bottom and inner wall of the liquid storage tank 4, removes impurities, promotes mixing, lays a solid foundation for subsequent flaw detection, after preparation, the operator pushes the push rod 3 according to the workpiece position, flexibly turns over with the help of the universal wheels 2 symmetrically distributed at the four corners of the bottom plate 1, quickly pushes the device to the designated position, if the workpiece is a large and complex structure with deep holes, threads and the like, the operator needs to adjust the spraying height, only needs to pull the second conveying pipe 604, the extension spring 606 is stretched, the positioning rod 608 is out of the fixed hole 605, after adjusting to the appropriate height, the extension spring 606 rebounds, the positioning rod 608 is accurately inserted into the corresponding positioning hole 609, the height is quickly locked, ensures that the spraying range covers the key parts, then, the external control system starts the self-priming pump 602, uses the suction force to transport the uniformly mixed magnetic powder suspension to the spraying pipe 615 through the liquid outlet pipe 601, the first conveying pipe 603 and the second conveying pipe 604, then, the control system starts the second motor 611, its output end drives the transmission shaft 612 to rotate, makes the first gear 613 rotate synchronously, with the meshing action, the second gear 614 rotates at high speed at the top of the second conveying pipe 604, drives the spraying pipe 615 and the bottom nozzle 616 to rotate together, the nozzle 616 sprays the magnetic powder suspension in mist form, no matter plane workpiece or complex three-dimensional special-shaped workpiece, the magnetic powder can cover the surface of the workpiece in all directions and uniformly, after the workpiece is magnetized by the magnetizing device, the magnetic force line at the defect of the workpiece is distorted, the magnetic powder is accurately adsorbed, forming clear and visible magnetic marks, the operator uses the lighting observation equipment, accurately judges the internal defect condition of the workpiece according to the position, shape and size of the magnetic mark, ensures the quality of the workpiece flowing into the next process is reliable, greatly improves the flaw detection efficiency and precision, meets the pursuit of high quality and high efficiency in modern industrial production, the model of the first motor 502 is Y315S-2, the model of the second motor 611 is YE2-132S-4, in this way, the use process of the magnetic particle flaw detector stirring and spraying device is completed.

[0030] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A stirring spray device for a magnetic particle flaw detector, comprising a base plate (1), characterized in that: The bottom of the base plate (1) is equipped with casters (2), and a push rod (3) is fixedly connected to one end of the base plate (1). A liquid storage tank (4) is placed on top of the base plate (1). A stirring device (5) is installed inside the liquid storage tank (4), and a spraying device (6) is installed on one side of the liquid storage tank (4). The spraying device (6) includes a liquid outlet pipe (601), a self-priming pump (602), a first delivery pipe (603), a second delivery pipe (604), a fixing hole (605), a telescopic spring (606), a stop block (607), a positioning rod (608), a positioning hole (609), a fixing plate (610), a second motor (611), a transmission shaft (612), a first gear (613), a second gear (614), a spray pipe (615), and a nozzle (616). The liquid storage tank (4) is connected to one side of the liquid outlet pipe (601). A self-priming pump (602) is installed at one end of the liquid outlet pipe (601). The self-priming pump (602) is internally connected to the first delivery pipe (603). The second delivery pipe (604) is slidably connected inside the first delivery pipe (603). A fixing hole (605) is opened on the surface of the first delivery pipe (603). A telescopic spring is fixedly connected to the outside of the fixing hole (605). A spring (606) is provided, with a stop (607) fixedly connected to one end of the spring (606), a positioning rod (608) fixedly connected to the inner side of the stop (607), a positioning hole (609) opened on the outer wall surface of the second conveying pipe (604), a fixing plate (610) fixedly connected to one side of the second conveying pipe (604), a second motor (611) fixedly connected above the fixing plate (610), a transmission shaft (612) fixedly connected to the output end of the second motor (611), a first gear (613) fixedly connected to one end of the transmission shaft (612), a second gear (614) meshing with the outer wall surface of the first gear (613), the second gear (614) rotating at the top of the second conveying pipe (604), a spray pipe (615) fixedly connected to the upper surface of the second gear (614), and a nozzle (616) installed at the bottom of the spray pipe (615).

2. The stirring and spraying device for a magnetic particle flaw detector according to claim 1, characterized in that: The omnidirectional wheels (2) are provided in multiple sets at the bottom of the base plate (1) and are symmetrically arranged at the four corners of the base plate (1) with respect to the central axis of the base plate (1).

3. The stirring and spraying device for a magnetic particle flaw detector according to claim 1, characterized in that: The stirring device (5) includes a motor housing (501), a first motor (502), a rotating shaft (503), a stirring shaft (504), a stirring rod (505), a connecting rod (506), a brush holder (507), and a brush (508). The motor housing (501) is fixedly connected to the top of the liquid storage tank (4). The first motor (502) is fixedly connected inside the motor housing (501). The rotating shaft (503) is fixedly connected to the output end of the first motor (502). The stirring shaft (504) is fixedly connected to one end of the rotating shaft (503). The stirring rod (505) is fixedly connected to the surface of the stirring shaft (504). The connecting rod (506) is fixedly connected to the outer side of the bottom end of the stirring shaft (504). The brush holder (507) is fixedly connected to one end of the connecting rod (506). The brush (508) is installed at the bottom of the brush holder (507).

4. The stirring and spraying device for a magnetic particle flaw detector according to claim 3, characterized in that: The rotating shaft (503) is connected to the stirring shaft (504) by the first motor (502) to form a rotating structure, and the stirring rod (505) is provided with multiple sets on the surface of the stirring shaft (504).

5. The stirring and spraying device for a magnetic particle flaw detector according to claim 3, characterized in that: Multiple sets of brush holders (507) and brushes (508) are provided at the bottom of the stirring shaft (504), and they are arranged at equal intervals around the center of the stirring shaft (504) on the outer wall surface of the bottom of the stirring shaft (504).

6. The stirring and spraying device for a magnetic particle flaw detector according to claim 1, characterized in that: The stop block (607) forms a telescopic structure by cooperating with the positioning rod (608) through the telescopic spring (606), and the positioning rod (608) slides inside the fixing hole (605).

7. The stirring and spraying device for a magnetic particle flaw detector according to claim 1, characterized in that: The positioning holes (609) are distributed in multiple sets at equal intervals on the surface of the second conveying pipe (604), and the outer wall size of the positioning rod (608) matches the inner wall size of the fixing hole (605) and the positioning hole (609).

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