Valve body side surface magnetic powder detection device

Abstract

The present application belongs to the technical field of magnetic powder detection, and discloses a valve body side surface magnetic powder detection device, which comprises a bent panel and a base, the base is located at the inner side bending part of the bent panel, a detection device is arranged on the bent panel, an auxiliary device is arranged in the base, two vertical plates are fixed to the top of the bent panel, a support is arranged between the opposite sides of the two vertical plates, and a spraying assembly is fixed to one end of the support. When spraying the magnetic powder, the auxiliary device is started to drive the casting valve body to rotate, so that the magnetic powder is uniformly sprayed on the outer surface of the casting valve body. When the outer surface of the casting valve body has a crack, the magnetic powder will also enter the crack. Then, a certain pressure airflow is introduced through the electromagnetic valve, the magnetic powder attached to the outer surface of the casting valve body is blown off, the magnetic powder in the crack will not be blown off, and then the magnetic powder on the outer surface of the casting valve body is detected by the fixed-focus camera, so that the crack distribution of the outer surface of the casting valve body can be observed.

Description

Technical Field

[0001] This invention relates to the field of magnetic particle testing technology, and in particular to a magnetic particle testing device for the side surface of a valve body. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. According to their function, they can be divided into shut-off valves, check valves, and regulating valves. Valves are generally composed of valve body, valve core, valve shell, etc. After casting, the outer surface of the valve body may have fine cracks or protruding fine strip-shaped burrs that adhere to the outer surface of the valve body. Therefore, trace detection is required, and magnetic particle detection is one of the commonly used detection methods.

[0003] Currently, when performing magnetic particle testing on the cast valve body, magnetic powder needs to be sprayed evenly on the outer surface of the valve body. However, during the spraying process, the magnetic powder is scattered and distributed randomly, making it difficult to observe the distribution of magnetic powder on the outer surface of the valve body through the testing equipment. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a magnetic particle detection device for the side surface of a valve body.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a magnetic particle detection device for the side surface of a valve body, comprising a bent panel and a base, the base being located at the inner bend of the bent panel, a detection device being provided on the bent panel, an auxiliary device being provided inside the base, two upright plates being fixed to the top of the bent panel, a support being provided between the opposite sides of the two upright plates, and a spraying component being fixed to one end of the support.

[0006] The spraying assembly includes a fixed plate, which is fixed to the bottom of one end of a bracket. A material injection channel is provided at the bottom of the fixed plate near one side edge, extending to the top of the bracket. An air inlet channel is provided at the top of the bracket near one side edge. One end of the air inlet channel extends obliquely to the bottom of the fixed plate and is connected to one side of the bottom of the material injection channel. A hexagonal hole is provided at the middle of the top of the bracket, extending to the bottom. The hexagonal hole is connected to the air inlet channel.

[0007] Preferably, a hexagonal rod is slidably connected between the inner walls of the hexagonal holes. Multiple through holes are equidistantly opened on one side of the hexagonal rod, extending to the other side. All the through holes are connected to the air intake channel. A bevel is opened at the bottom of the hexagonal rod, extending to the front and rear sides.

[0008] Preferably, the hexagonal rod has an inner sliding cavity inside, which is interconnected with multiple through holes. The bottom of the inner sliding cavity extends into the interior of the bevel. A sliding plate is slidably connected between the inner walls of the inner sliding cavity. Multiple bridging holes extending to the other side are equidistantly provided on one side of the sliding plate. The multiple bridging holes are interconnected with the through holes. The bottom of the sliding plate extends slidably into the interior of the bevel. A contact piece is fixed to the bottom of the sliding plate and is located inside the bevel.

[0009] Preferably, one end of the bracket has an inner cavity, one side of the inner cavity has an insertion port, one end of the insertion port extends through to one side of the air inlet channel, the material injection channel and the insertion port are interconnected, an adjustment plate is slidably arranged between the inner walls of the inner cavity, and a return spring is fixed on one side of the adjustment plate.

[0010] Preferably, one end of the reset spring is fixed to the inner wall of one side of the inner cavity, and the other side of the adjusting plate is fixed with an insert plate. One end of the insert plate slides into the insertion port. The top of the insert plate has a through hole that extends to the bottom. The air intake channel is connected to the through hole. One end of the insert plate is fixed with a push rod, and one end of the push rod slides into the air intake channel.

[0011] Preferably, a limiting ring is fixed between the inner walls of the air intake channel, and a torque hinge is fixed on one side of the inner wall of the air intake channel at the bottom of the limiting ring. A butterfly plate is fixed on the torque hinge, the butterfly plate is located inside the air intake channel, and the top of the butterfly plate is sealed and fitted to the bottom of the limiting ring. One end of the push rod extends to the bottom side of the butterfly plate.

[0012] Preferably, the detection device includes a camera frame, an arc-shaped support plate is fixed to the front side of the camera frame near the bottom edge, a fixed-focus camera is installed inside the arc-shaped support plate, a laser rangefinder is installed on the front side of the camera frame, and a guide plate is fixed to the bottom of the camera frame, with the bottom of the guide plate fixed to the top of the bent panel.

[0013] Preferably, the auxiliary device includes a turntable, an electromagnetic drive wheel is provided inside the base, a rotating sleeve is rotatably provided between the inner walls of the base near the top edge, the bottom of the rotating sleeve is connected to the electromagnetic drive wheel, the bottom of the turntable is fixed to the top of the rotating sleeve, a pad is fixed to the top of the turntable, and a cast valve body is placed on the top of the pad.

[0014] Preferably, a washer is fixed at the top of the turntable near the edge of the outer surface, and the bent end of the hexagonal rod slides and engages with the washer. A notch is provided at the top of the washer near one side edge, and an installation port is provided on one side of the turntable below the notch. A solenoid valve is installed inside the installation port.

[0015] Preferably, an annular tube is fixed at the top of the pad near the edge of the outer surface. Four vertical tubes are equidistantly connected to the top of the annular tube along the circumferential direction. The tops of the multiple vertical tubes are all closed. Multiple nozzles are connected to the outer surfaces of the multiple vertical tubes. The output port of the solenoid valve is connected to the bottom of the annular tube. The openings of the multiple nozzles all face the center of the pad.

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

[0017] 1. In this invention, when spraying magnetic powder, an auxiliary device needs to be activated to drive the casting valve body to rotate, so that the magnetic powder can be evenly sprayed on the outer surface of the casting valve body. When there are cracks on the outer surface of the casting valve body, the magnetic powder will also enter the cracks. Then, a certain pressure airflow is introduced through the solenoid valve to blow off the magnetic powder attached to the outer surface of the casting valve body, while the magnetic powder located in the cracks will not be blown off. Then, the distribution of cracks on the outer surface of the casting valve body can be observed by detecting the magnetic powder on the outer surface of the casting valve body through a fixed-focus camera.

[0018] 2. When the detection device in this invention is working, the outer surface of the cast valve body can be detected by a fixed-focus camera and a laser rangefinder, which makes it easy to observe the distribution of residual magnetic powder.

[0019] 3. When the auxiliary device in this invention is working, the electromagnetic drive wheel drives the rotating sleeve to rotate, which in turn drives the components on the turntable to rotate synchronously. In conjunction with the spraying assembly, the sprayed magnetic powder can be evenly covered on the outer surface of the cast valve body. During the rotation, the on / off of the spraying assembly is controlled, and the magnetic powder on the outer surface of the cast valve body is post-processed after spraying the magnetic powder, laying the groundwork for the detection device to detect it.

[0020] 4. When the spraying component of this invention is working, the external high-pressure airflow flows through the air inlet channel. The high-pressure airflow inside the air inlet channel generates thrust, so the high-pressure airflow acts on the disc, pressing one end of the disc downwards and causing the disc to flip downwards from the torque hinge. At this time, the air inlet channel is in a conductive state, and the internal high-pressure airflow connects the air inlet channel with the bottom of the fixed plate. At the same time, when the disc flips downwards, it pushes the push rod to one side, causing it to slide the insert plate, which in turn causes the through hole on the insert plate to slide to the point where it connects with the injection channel. At this time, the magnetic powder inside the injection channel can flow downwards and be evenly sprayed outwards from the top of the fixed plate under the blowing of the high-pressure air inside the air inlet channel. Attached Figure Description

[0021] Figure 1 This invention provides a front-view three-dimensional structural schematic diagram of a magnetic particle detection device for the side surface of a valve body;

[0022] Figure 2 This invention provides a side-view three-dimensional structural diagram of a magnetic particle detection device for the side surface of a valve body;

[0023] Figure 3 This invention provides a front-view three-dimensional structural diagram of the detection device in a valve body side surface magnetic particle detection device;

[0024] Figure 4 This invention provides a side-view three-dimensional structural diagram of the detection device in a valve body side surface magnetic particle detection device;

[0025] Figure 5 This invention provides a front-view three-dimensional structural diagram of the auxiliary device and the spraying assembly working together in a magnetic particle inspection device for the side surface of a valve body;

[0026] Figure 6 This invention provides a cross-sectional three-dimensional structural diagram of the spraying component in a magnetic particle testing device for the side surface of a valve body;

[0027] Figure 7 This invention provides a cross-sectional three-dimensional structural diagram of an auxiliary device in a magnetic particle inspection device for the side surface of a valve body;

[0028] Figure 8 For the present invention Figure 6 A magnified view of a portion of point A in the middle.

[0029] In the diagram: 1. Bending panel; 2. Support leg; 3. Vertical plate; 12. Bracket; 13. Guide frame; 14. Camera mount; 15. Base; 16. Fixing plate; 17. Turntable; 18. Guide plate; 19. Fixed-focus camera; 20. Arc-shaped support plate; 21. Laser rangefinder; 22. Pad; 23. Cast valve body; 24. Washer ring; 25. Notch; 26. Mounting port; 27. Solenoid valve; 28. Hexagonal hole; 29. ​​Hexagonal rod; 30. Inner sliding cavity 31. Slide plate; 32. Through hole; 33. Bridging hole; 34. Reverse joint; 35. Contact piece; 36. Air intake channel; 37. Injection channel; 38. Electromagnetic drive wheel; 39. Rotating sleeve; 40. Annular tube; 41. Vertical tube; 42. Nozzle; 43. Inner cavity; 44. Return spring; 45. Adjusting plate; 46. Insert plate; 47. Insertion port; 48. Through hole; 49. Push rod; 50. Butterfly plate; 51. Limiting ring; 52. Torque hinge. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-8The present invention provides a technical solution: a magnetic particle detection device for the side surface of a valve body, comprising a bent panel 1 and a base 15. The base 15 is located at the inner bend of the bent panel 1. A detection device is provided on the bent panel 1. An auxiliary device is provided inside the base 15. Two upright plates 3 are fixed on the top of the bent panel 1. A bracket 12 is provided between the opposite sides of the two upright plates 3. A spraying component is fixed at one end of the bracket 12.

[0032] The effect achieved is as follows: the casting valve body 23 is placed on the pad 22, the injection channel 37 is connected to the external magnetic powder supply pipe, and the air intake channel 36 is connected to the external high-pressure air pipe. When spraying magnetic powder, the auxiliary device needs to be activated to drive the casting valve body 23 to rotate, so that the magnetic powder can be evenly sprayed on the outer surface of the casting valve body 23. When there are cracks on the outer surface of the casting valve body 23, the magnetic powder will also enter the cracks. Then, a certain pressure airflow is introduced through the solenoid valve 27 to blow off the magnetic powder attached to the outer surface of the casting valve body 23, while the magnetic powder located in the cracks will not be blown off. Then, the distribution of cracks on the outer surface of the casting valve body 23 can be observed by detecting the magnetic powder on the outer surface of the casting valve body 23 through the fixed-focus camera 19.

[0033] like Figure 5 , Figure 6 and Figure 8As shown, the spraying assembly includes a fixed plate 16, which is fixed to the bottom of one end of a bracket 12. A material injection channel 37 extending through to the top of the bracket 12 is formed near one edge of the bottom of the fixed plate 16. An air inlet channel 36 is formed near one edge of the top of the bracket 12, with one end of the air inlet channel 36 extending obliquely through to the bottom of the fixed plate 16 and communicating with one side of the bottom of the material injection channel 37. A hexagonal hole 28 extending through to the bottom is formed at the middle of the top of the bracket 12, and the hexagonal hole 28 and the air inlet channel 36 communicate with each other. A hexagonal rod 29 is slidably connected between the inner walls of the hexagonal hole 28. Multiple through holes 32 are equidistantly provided on one side of the hexagonal rod 29, extending to the other side. Each through hole 32 is interconnected with the air intake channel 36. A bevel 34 extending to both the front and rear sides is provided at the bottom of the hexagonal rod 29. An inner sliding cavity 30 is provided inside the hexagonal rod 29, communicating with the multiple through holes 32. The bottom of the inner sliding cavity 30 extends into the interior of the bevel 34. A sliding plate 31 is slidably connected between the inner walls of the inner sliding cavity 30. Multiple bridging holes 33 are equidistantly provided on one side of the sliding plate 31, extending to the other side. Each bridging hole 33 is interconnected with the through holes 32. The bottom of the sliding plate 31... The sliding plate 31 extends into the interior of the bevel 34. A contact piece 35 is fixed to the bottom of the sliding plate 31, located inside the bevel 34. An inner cavity 43 is formed at one end of the bracket 12, and an insertion port 47 is formed on one side of the inner cavity 43. One end of the insertion port 47 extends through to one side of the air inlet channel 36. The injection channel 37 and the insertion port 47 are interconnected. An adjusting plate 45 is slidably arranged between the inner walls of the inner cavity 43. A return spring 44 is fixed to one side of the adjusting plate 45, with one end fixed to one side of the inner wall of the inner cavity 43. An insertion plate 46 is fixed to the other side of the adjusting plate 45, with one end of the insertion plate 46 slidably extending into the interior of the bevel 34. Inside the socket 47, the top of the insert plate 46 has a through hole 48 extending to the bottom. The air intake channel 36 is connected to the through hole 48. A push rod 49 is fixed to one end of the insert plate 46. One end of the push rod 49 slides through into the air intake channel 36. A limit ring 51 is fixed between the inner walls of the air intake channel 36. A torque hinge 52 is fixed to one side of the inner wall of the air intake channel 36 at the bottom of the limit ring 51. A butterfly plate 50 is fixed on the torque hinge 52. The butterfly plate 50 is located inside the air intake channel 36, and the top of the butterfly plate 50 is sealed and fitted to the bottom of the limit ring 51. One end of the push rod 49 extends to the bottom side of the butterfly plate 50.

[0034] The effect is that when the bevel 34 at the bottom of the hexagonal rod 29 is not rotated to the notch 25, the contact piece 35 is lifted upward by the washer ring 24. At this time, the bridging hole 33 on the slide plate 31 is opposite to the through hole 32, so the air intake channel 36 is in a conductive state. The external high-pressure airflow flows through the air intake channel 36. Inside the air intake channel 36, the flow of high-pressure airflow will generate thrust. Therefore, the high-pressure airflow acts on the disc 50, pressing one end of the disc 50 downward, causing the disc 50 to... The disc 50 flips downwards from the torque hinge 52, at which point the air intake channel 36 is open. High-pressure airflow from inside the channel connects to the bottom of the fixed plate 16. Simultaneously, as the disc 50 flips downwards, it pushes the push rod 49 to one side, causing the insert plate 46 to slide. This allows the through hole 48 on the insert plate 46 to slide to connect with the injection channel 37. At this point, the magnetic powder inside the injection channel 37 can flow downwards, and under the blowing force of the high-pressure air inside the air intake channel 36, it can flow from the fixed plate 16. The top of the fixed plate 16 is sprayed evenly outward. When the bevel 34 rotates to the notch 25, the washer 24 will no longer exert an upward lifting constraint on the contact piece 35. Under the weight of the slide plate 31, it will slide downward, causing the bridging hole 33 and the through hole 32 to be misaligned. At this time, the air intake channel 36 is cut off. Since there is no high-pressure air flow inside the air intake channel 36, the torque force of the torque hinge 52 can drive the disc 50 to flip upward and reset, thereby releasing the push force on the push rod 49. At this time, under the elastic force of the reset spring 44, the insert plate 46 can be reset, cutting off the injection channel 37. At this time, the magnetic powder spraying ends. When the slide plate 31 slides downward, it will press the switch of the solenoid valve 27 to open the solenoid valve 27, allowing the external air with a certain pressure to enter the annular pipe 40, and then enter the riser pipe 41 and spray out from the spray pipe 42 onto the outer surface of the casting valve body 23, blowing off the magnetic powder on the outer surface of the casting valve body 23 for easy detection by the detection device.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the detection device includes a camera frame 14, an arc-shaped support plate 20 is fixed on the front side of the camera frame 14 near the bottom edge, a fixed-focus camera 19 is arranged inside the arc-shaped support plate 20, a laser rangefinder 21 is arranged on the front side of the camera frame 14, and a guide plate 18 is fixed on the bottom of the camera frame 14. The bottom of the guide plate 18 is fixed to the top of the bent panel 1.

[0036] The effect achieved is that the outer surface of the cast valve body 23 can be inspected by the fixed-focus camera 19 and the laser rangefinder 21, which makes it easier to observe the distribution of residual magnetic powder.

[0037] like Figure 1 , Figure 2 , Figure 5 and Figure 7As shown, the auxiliary device includes a turntable 17, an electromagnetic drive wheel 38 is installed inside the base 15, a rotating sleeve 39 is rotatably installed between the inner walls of the base 15 near the top edge, the bottom of the rotating sleeve 39 is connected to the electromagnetic drive wheel 38, the bottom of the turntable 17 is fixed to the top of the rotating sleeve 39, a pad 22 is fixed to the top of the turntable 17, a cast valve body 23 is placed on the top of the pad 22, a washer ring 24 is fixed to the top of the turntable 17 near the outer surface edge, the bevel 34 at the bottom of the hexagonal rod 29 slides and engages with the washer ring 24, and the top of the washer ring 24... A notch 25 is provided near one edge of the part. An installation port 26 is provided below the notch 25 on one side of the turntable 17. A solenoid valve 27 is installed inside the installation port 26. An annular tube 40 is fixed on the top of the pad 22 near the outer edge of the surface. Four vertical tubes 41 are equidistantly connected to the top of the annular tube 40 along the circumferential direction. The tops of the multiple vertical tubes 41 are all closed. Multiple nozzles 42 are connected to the outer surface of the multiple vertical tubes 41. The output port of the solenoid valve 27 is connected to the bottom of the annular tube 40. The openings of the multiple nozzles 42 all face the center of the pad 22.

[0038] The effect achieved is that the electromagnetic drive wheel 38 drives the rotating sleeve 39 to rotate, which in turn drives the components on the turntable 17 to rotate synchronously. Combined with the spraying assembly, the sprayed magnetic powder can be evenly covered on the outer surface of the cast valve body 23. During rotation, the on / off state of the spraying assembly is controlled, and the magnetic powder on the outer surface of the cast valve body 23 is post-processed after spraying, laying the groundwork for the detection device. When the turntable 17 rotates, if the bevel 34 at the bottom of the hexagonal rod 29 has not rotated to the notch 25, the contact piece 35 is lifted upwards by the washer ring 24. At this time, the bridging hole 33 on the slide plate 31 is aligned with the through hole 32, therefore... When the air intake channel 36 is in the open state, when the bevel 34 is rotated to the notch 25, the washer ring 24 will not exert an upward lifting constraint on the contact piece 35. Under the weight of the slide plate 31, it will slide downward, thereby causing the bridging hole 33 and the through hole 32 to be misaligned. At this time, the air intake channel 36 is in the cut-off state. When the slide plate 31 slides downward, it will press the switch of the solenoid valve 27 to open the solenoid valve 27, thereby allowing the external air with a certain pressure to enter the annular pipe 40, and then enter the riser pipe 41 and be sprayed out from the nozzle 42 onto the outer surface of the cast valve body 23, blowing off the magnetic powder on the outer surface of the cast valve body 23, which is convenient for the detection device to detect.

[0039] Working Principle: When using this device, the casting valve body 23 is placed on the pad 22, the injection channel 37 is connected to the external magnetic powder supply pipe, and the air intake channel 36 is connected to the external high-pressure air pipe. When spraying magnetic powder, the auxiliary device needs to be activated to rotate the casting valve body 23, thus allowing the magnetic powder to be evenly sprayed onto the outer surface of the casting valve body 23. When there are cracks on the outer surface of the casting valve body 23, the magnetic powder will also enter the cracks. Then, a certain pressure airflow is introduced through the solenoid valve 27 to blow off the magnetic powder adhering to the outer surface of the casting valve body 23, while the magnetic powder located in the cracks will not be blown off. Then, the magnetic powder on the outer surface of the casting valve body 23 can be detected by the fixed-focus camera 19. The rotating sleeve 39 is rotated by the electromagnetic drive wheel 38, thereby... The components on the turntable 17 rotate synchronously. In conjunction with the spraying assembly, the sprayed magnetic powder is evenly coated onto the outer surface of the cast valve body 23. During rotation, the on / off state of the spraying assembly is controlled, and the magnetic powder on the outer surface of the cast valve body 23 is post-treated after spraying, preparing for detection by the testing device. When the turntable 17 rotates, if the bevel 34 at the bottom of the hexagonal rod 29 has not rotated to the notch 25, the contact piece 35 is lifted upwards by the washer ring 24. At this time, the bridging hole 33 on the slide plate 31 is aligned with the through hole 32, so the air intake channel 36 is open. External high-pressure airflow flows through the air intake channel 36. Inside the air intake channel 36, the flow of high-pressure airflow generates thrust, so the high-pressure airflow acts on the disc 50. Press one end of the disc 50 downwards, causing it to flip downwards from the torque hinge 52. At this point, the air intake channel 36 is open, and the high-pressure airflow inside connects the air intake channel 36 to the bottom of the fixed plate 16. Simultaneously, as the disc 50 flips downwards, it pushes the push rod 49 to one side, causing the insert plate 46 to slide. This allows the through hole 48 on the insert plate 46 to slide to connect with the injection channel 37. At this point, the magnetic powder inside the injection channel 37 can flow downwards and, under the blowing force of the high-pressure air inside the air intake channel 36, can be evenly sprayed from the top of the fixed plate 16 to the outside. When the bevel 34 rotates to the notch 25, the washer ring 24 will no longer exert an upward restraining force on the contact piece 35, and it will slide downwards under the weight of the slide plate 31. This causes the bridging hole 33 and the through hole 32 to be misaligned and opposite. At this time, the air intake channel 36 is cut off. Since there is no high-pressure air flow inside the air intake channel 36, the butterfly plate 50 can be driven to flip upward and reset under the torque force of the torque hinge 52, thereby releasing the push force on the push rod 49. At this time, the insert plate 46 can be driven to reset under the elastic force of the reset spring 44, cutting off the injection channel 37. At this time, the magnetic powder spraying ends, and when the slide plate 31 slides downward, it will press the switch of the solenoid valve 27 to open the solenoid valve 27, thereby allowing the external air with a certain pressure to enter the annular pipe 40, and then enter the riser pipe 41 and be sprayed out from the nozzle 42 onto the outer surface of the casting valve body 23, blowing off the magnetic powder on the outer surface of the casting valve body 23, which is convenient for the detection device to detect.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic particle inspection device for the side surface of a valve body, characterized in that, It includes a bent panel (1) and a base (15). The base (15) is located at the inner bend of the bent panel (1). A detection device is provided on the bent panel (1). An auxiliary device is provided inside the base (15). Two upright plates (3) are fixed on the top of the bent panel (1). A bracket (12) is provided between the opposite sides of the two upright plates (3). A spraying component is fixed at one end of the bracket (12). The spraying assembly includes a fixed plate (16), which is fixed to the bottom of one end of a bracket (12). A material injection channel (37) extending through to the top of the bracket (12) is provided near one edge of the bottom of the fixed plate (16). An air intake channel (36) is provided near one edge of the top of the bracket (12). One end of the air intake channel (36) extends obliquely through to the bottom of the fixed plate (16) and communicates with one side of the bottom of the material injection channel (37). A hexagonal hole (28) extending through to the bottom is provided at the middle of the top of the bracket (12). The hexagonal hole (28) and the air intake channel (36) are interconnected. A hexagonal rod (29) is slidably connected between the inner walls of the hexagonal hole (28). A plurality of through holes (32) are equidistantly provided on one side of the hexagonal rod (29), extending to the other side. Each of the through holes (32) is connected to the air intake channel (36). A bevel (34) extending to the front and rear sides is provided at the bottom of the hexagonal rod (29). An inner sliding cavity (30) is provided inside the hexagonal rod (29). The inner sliding cavity (30) is connected to the plurality of through holes (32). The bottom of the inner sliding cavity (30) extends into the interior of the bevel (34). A sliding plate (31) is slidably connected between the inner walls of the inner sliding cavity (30). A plurality of bridging holes (33) extending to the other side are equidistantly provided on one side of the sliding plate (31), and each of the bridging holes (33) is connected to the through holes (32). The bottom of the slide plate (31) extends slidably into the interior of the bevel (34). A contact piece (35) is fixed to the bottom of the slide plate (31). The contact piece (35) is located inside the bevel (34). An inner cavity (43) is opened inside one end of the bracket (12). An insertion port (47) is opened on one side of the inner cavity (43). One end of the insertion port (47) extends through to one side of the air intake channel (36). The injection channel (37) and the insertion port (47) are interconnected. An adjusting plate (45) is slidably arranged between the inner walls of the inner cavity (43). A return spring (44) is fixed on one side of the adjusting plate (45). One end of the return spring (44) is fixed on one side of the inner wall of the inner cavity (43). (45) is fixed with a plate (46) on the other side. One end of the plate (46) slides into the socket (47). The top of the plate (46) has a through hole (48) that extends to the bottom. The air intake channel (36) is connected to the through hole (48). One end of the plate (46) is fixed with a push rod (49). One end of the push rod (49) slides into the air intake channel (36). A limit ring (51) is fixed between the inner walls of the air intake channel (36). A torque hinge (52) is fixed at the bottom of the limit ring (51) on one side of the inner wall of the air intake channel (36). A butterfly plate (50) is fixed on the torque hinge (52). The butterfly plate (50) is located inside the air intake channel (36).Furthermore, the top of the butterfly plate (50) is sealed and fitted to the bottom of the limiting ring (51), and one end of the push rod (49) extends to one side of the bottom of the butterfly plate (50); The auxiliary device includes a turntable (17), an electromagnetic drive wheel (38) is provided inside the base (15), a rotating sleeve (39) is rotatably provided between the inner walls of the base (15) near the top edge, the bottom of the rotating sleeve (39) is connected to the electromagnetic drive wheel (38), the bottom of the turntable (17) is fixed to the top of the rotating sleeve (39), a pad (22) is fixed to the top of the turntable (17), a cast valve body (23) is placed on the top of the pad (22), a washer ring (24) is fixed to the top of the turntable (17) near the outer surface edge, the bevel (34) at the bottom of the hexagonal rod (29) slides and engages with the washer ring (24), a notch (25) is opened on the top of the washer ring (24) near one side edge, an installation port (26) is opened on one side of the turntable (17) below the notch (25), and a solenoid valve (27) is provided inside the installation port (26).

2. The magnetic particle inspection device for the side surface of a valve body according to claim 1, characterized in that: The detection device includes a camera frame (14), an arc-shaped support plate (20) is fixed on the front side of the camera frame (14) near the bottom edge, a fixed-focus camera (19) is arranged inside the arc-shaped support plate (20), a laser rangefinder (21) is arranged on the front side of the camera frame (14), a guide plate (18) is fixed on the bottom of the camera frame (14), and the bottom of the guide plate (18) is fixed on the top of the bent panel (1).

3. The magnetic particle detection device for the side surface of a valve body according to claim 2, characterized in that: An annular tube (40) is fixed at the top of the pad (22) near the edge of the outer surface. Four vertical tubes (41) are equidistantly connected at the top of the annular tube (40) along the circumferential direction. The tops of the multiple vertical tubes (41) are all closed. Multiple nozzles (42) are connected to the outer surfaces of the multiple vertical tubes (41). The output port of the solenoid valve (27) is connected to the bottom of the annular tube (40). The openings of the multiple nozzles (42) are all facing the center of the pad (22).

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