A device for intelligently detecting surface defects of steel

Abstract

The present invention discloses a device for intelligently detecting surface defects of steel, which relates to the technical field of steel detection. The present invention includes a machine body. On the left and right sides of the top of the machine body, mounting seats are rotationally connected in a limited manner. A steel material is mounted between the mounting seats in a limited manner. A motor is fixedly installed on the right side of the machine body, and the motor is in transmission connection with the right mounting seat. In the central part of the top of the machine body, a coil ring is slidably connected in a limited manner. Spray nozzles are uniformly and fixedly installed on the inner side of the coil ring. A connecting pipe is fixedly installed at the central part of the top end of the coil ring. An intermittent movement assembly is arranged between the left mounting seat and the coil ring. The present invention can perform intermittent cross magnetization on the surface of the steel material, thereby improving the magnetization effect, being beneficial to the observation of magnetic powder, and improving the detection effect of surface defects of the steel material. It can perform intermittent cross magnetization on the left and right of the steel material and spray magnetic suspension liquid, avoiding the phenomenon of uneven distribution of magnetic suspension liquid and improving the magnetization effect.

Description

Technical Field

[0001] The present invention relates to the technical field of steel material detection, and in particular to a device for intelligently detecting surface defects of steel material. Background Art

[0002] In the production and welding of steel, the quality of steel needs to be tested before leaving the factory, and the detection of surface defects is a kind of quality inspection. Most steels are ferromagnetic materials. Therefore, magnetic particle testing can be used for surface defect detection. Magnetic particle testing is a non-destructive testing method that detects defects on the surface or near the surface of ferromagnetic materials by the accumulation of magnetic powder in the leakage magnetic field near the defect. It has the advantages of high sensitivity, easy operation, fast inspection speed, easy to detect workpieces, and low inspection cost.

[0003] However, the existing devices for intelligently detecting surface defects of steel materials through magnetic particle inspection still have the following defects during use:

[0004] 1. When the existing intelligent device for detecting surface defects of steel is spraying the magnetic suspension, it is directly uniformly sprayed through the laterally distributed nozzles without cooperating with the energized coil. Therefore, in the process of moving the energized coil for magnetization, the magnetic suspension that is not magnetized in time will flow downward under the action of gravity, which will easily lead to uneven distribution of the magnetic suspension. At the same time, the movement of the traditional energized coil is a uniform translation, without overlapping magnetization with intermittent pauses, which reduces the magnetization effect.

[0005] 2. When the existing intelligent device for detecting steel surface defects uses an energized coil for magnetization, the energized coil only performs translational magnetization, and does not perform intermittent cross-magnetization on various areas on the steel surface, thereby reducing the magnetization effect, being unfavorable for the observation of magnetic powder, and reducing the detection effect. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned problems that the magnetization is not carried out in time while the magnetic suspension is sprayed, the magnetic suspension will be unevenly distributed due to the casting, and there is no overlapping magnetization with intermittent pauses, which reduces the magnetization effect, and there is no intermittent cross-magnetization of various areas on the surface of the steel, which further reduces the magnetization effect, is not conducive to the observation of magnetic powder, and reduces the detection effect. The present invention provides a device for intelligently detecting surface defects of steel.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] An apparatus for intelligently detecting surface defects of steel, comprising a machine body. On the left and right sides of the top of the machine body, there are mounting seats rotatably connected with limited positions. A steel material is mounted between the mounting seats with limited positions. A motor is fixedly installed on the right side of the machine body, and the motor is in transmission connection with the right mounting seat. At the central position of the top of the machine body, there is a coil ring slidably connected with limited positions. Inside the coil ring, spray nozzles are evenly and fixedly installed. At the central position of the top end of the coil ring, a connecting pipe is fixedly installed;

[0009] An intermittent movement assembly is arranged between the left mounting seat and the coil ring. The intermittent movement assembly is used to drive the coil ring to move intermittently left and right. Below the coil ring inside the machine body, there is a cross magnetization assembly, and the cross magnetization assembly is used to cross magnetize the steel material.

[0010] Further, the angle of deflection of the coil ring in the initial state is 45°.

[0011] Further, an energized coil is arranged inside the coil ring, and the coil ring is located outside the steel material. Thus, the magnetic field generated by the energized coil can magnetize the steel material in the middle.

[0012] Further, a chute is opened at the top of the machine body, and the connecting pipe is slidably connected with limited positions inside the chute. The connecting pipe is communicated with a magnetic suspension liquid conveying pipe, and the connecting pipe is communicated with the spray nozzles inside the coil ring, so that the magnetic suspension liquid can be sprayed out from the spray nozzles through the connecting pipe and the coil ring.

[0013] Further, the intermittent movement assembly includes a half gear. The half gear is fixedly installed on the periphery of the left mounting seat. At the central position inside the machine body, there is a threaded rod rotatably connected with limited positions. On the periphery of the left side of the threaded rod, a gear one is fixedly installed. The gear one is located below the half gear, and the gear one can be meshed with the half gear, so that the gear one can be driven to rotate during the rotation of the half gear. A threaded sleeve is threadedly connected to the outside of the threaded rod, and the rotation of the threaded rod can drive the threaded sleeve to move.

[0014] Further, the top end of the threaded sleeve extends upward to the bottom of the coil ring, and the top of the threaded sleeve is rotatably connected with limited positions at the bottom of the coil ring, so that while the threaded sleeve can drive the coil ring to move left and right, the coil ring can also rotate relative to the threaded sleeve.

[0015] Further, the cross magnetization assembly includes a conical ring. A conical ring is fixedly installed at the right end of the half gear. Two sections of teeth are fixedly installed on the periphery of the conical ring, and the number of teeth in the two sections of teeth is the same. A bevel gear is rotationally connected in a limited manner inside the machine body, and the bevel gear is located right below the conical ring. A column is eccentrically fixedly installed at the bottom end of the bevel gear. A front sliding rod is slidably connected in a limited manner on the front side above the threaded rod inside the machine body. A sleeve rod is fixedly installed at the left end of the front sliding rod, and the sleeve rod is sleeved on the outside of the column. Therefore, when the bevel gear rotates, through the cooperation of the column and the sleeve rod, the sleeve rod and the front sliding rod can be driven to move left and right. A rear sliding rod is slidably connected in a limited manner on the rear side of the front sliding rod inside the machine body. Hinge assemblies are arranged at the tops of the left and right sides of the front sliding rod and the rear sliding rod. Through the action of the hinge assemblies, the front sliding rod and the rear sliding rod can move in a crosswise and staggered manner. Slide sleeves are slidably connected in a limited manner on the outside of the front sliding rod and the rear sliding rod. A rack is fixedly installed at the adjacent end of each slide sleeve. A second gear is fixedly installed on the periphery of the bottom of the coil ring. The second gear is located between the two slide sleeves on both sides, and the second gear meshes with the racks on the front and rear sides. When the slide sleeves move in a staggered manner, the second gear can be driven to rotate. Limiting grooves are symmetrically formed in the upper and lower sides inside the slide sleeves. Limiting blocks are symmetrically and elastically slidably connected to the upper and lower sides of the front sliding rod and the rear sliding rod, and the limiting blocks are evenly distributed left and right on the front sliding rod and the rear sliding rod. The limiting blocks are adapted to the limiting grooves, and thus the slide sleeves can be limited on the outside of the front sliding rod and the rear sliding rod.

[0016] Further, the teeth on the conical ring are located on one side of the smooth area of the half gear, and the two sections of teeth are intermittently distributed. Therefore, the meshing of the teeth on the conical ring with the bevel gear is carried out when the half gear does not drive the first gear to rotate. During the rotation of the conical ring, the teeth can mesh with the bevel gear. The number of teeth in each of the two sections of teeth is half of the number of teeth of the bevel gear, so that the angles by which the two sections of teeth drive the bevel gear to rotate are both 180°.

[0017] Further, the hinge assembly includes hinge rods. Hinge rods are rotationally connected in a limited manner on the left and right sides inside the machine body. The hinge rods are located above the left and right sides of the front sliding rod and the rear sliding rod. Waist slots are symmetrically formed in the front and rear sides of the hinge rods. Fixed columns are fixedly installed at the top ends of the left and right sides of the front sliding rod and the rear sliding rod, and the fixed columns are all located inside the waist slots. Therefore, when the front sliding rod moves, the rear sliding rod can be driven to move in the opposite direction through the action of the hinge rods.

[0018] Further, when the front sliding rod and the rear sliding rod move in a staggered manner once, the angle by which the second gear is driven to rotate by the slide sleeves and the racks is 90°. Further, after the coil ring is driven to rotate by the second gear, the position of the original coil ring and the position of the rotated coil ring are vertically crossed.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. In the present invention, through the cooperative design of the intermittent movement component and the cross magnetization component, intermittent cross magnetization can be carried out on each area of the steel surface, thereby improving the magnetization effect, facilitating the observation of magnetic powder, and enhancing the detection effect of steel surface defects.

[0021] 2. In the present invention, through the design of the intermittent movement component and the nozzle-carrying coil ring, intermittent cross magnetization of the steel and spraying of the magnetic suspension liquid can be carried out, avoiding the phenomenon that the magnetic suspension liquid that has not been magnetized in time flows downward under the action of gravity, and further avoiding the uneven distribution of the magnetic suspension liquid during the magnetization process, thus improving the magnetization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic three-dimensional structure of the present invention Figure 1 ;

[0023] Figure 2 is a schematic three-dimensional structure of the present invention Figure 2 ;

[0024] Figure 3 is a schematic three-dimensional structure inside the body of the present invention Figure 1 ;

[0025] Figure 4 is a schematic three-dimensional structure inside the body of the present invention Figure 2 ;

[0026] Figure 5 is a schematic diagram of the three-dimensional structure inside the left side of the body of the present invention;

[0027] Figure 6 is a schematic diagram of the partial three-dimensional structure inside the left side of the body of the present invention;

[0028] Figure 7 is a schematic diagram of the three-dimensional structure of the coil ring and the cross magnetization component of the present invention;

[0029] Figure 8 is a schematic diagram of the partial three-dimensional structure of the cross magnetization component of the present invention Figure 1 ;

[0030] Figure 9 is a schematic diagram of the partial three-dimensional structure of the cross magnetization component of the present invention Figure 2 ;

[0031] Figure 10 is a schematic diagram of the partial three-dimensional structure of the cross magnetization component of the present invention Figure 3 ;

[0032] Figure 11 is an exploded view of the partial three-dimensional structure of the cross magnetization component of the present invention.

[0033] Reference numerals: 1, body; 11, chute; 2, mounting seat; 3, steel; 4, motor; 5, coil ring; 6, nozzle; 7, connecting pipe; 8, intermittent movement assembly; 81, half gear; 82, threaded rod; 83, gear one; 84, threaded sleeve; 9, cross magnetization assembly; 91, conical ring; 92, teeth; 93, bevel gear; 94, upright column; 95, front slide bar; 96, sleeve rod; 97, rear slide bar; 98, hinge assembly; 981, hinge rod; 982, waist slot; 983, fixed column; 99, sliding sleeve; 910, rack; 911, gear two; 912, limit slot; 913, limit block. Detailed implementation manners

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] An apparatus for intelligently detecting surface defects of steel according to a preferred embodiment of the present invention will be elaborated in detail below, as Figures 1-4 shown, an apparatus for intelligently detecting surface defects of steel includes a body 1. The left and right sides at the top of the body 1 are rotationally connected with mounting seats 2 in a limited manner. A steel 3 is installed between the mounting seats 2 in a limited manner. A motor 4 is fixedly installed on the right side of the body 1. The motor 4 is in transmission connection with the right mounting seat 2. A coil ring 5 is slidably connected with the body 1 at the center of the top in a limited manner. An energized coil is arranged inside the coil ring 5, and the coil ring 5 is located outside the steel 3. Therefore, the magnetic field generated by the energized coil can magnetize the steel 3 in the middle.

[0036] Nozzles 6 are uniformly and fixedly installed on the inner side of the coil ring 5. A connecting pipe 7 is fixedly installed at the center of the top of the coil ring 5. A chute 11 is formed in the top of the body 1, and the connecting pipe 7 is slidably connected with the body 1 inside the chute 11 in a limited manner. The connecting pipe 7 is communicated with a magnetic suspension liquid conveying pipe, and the connecting pipe 7 is communicated with the nozzle 6 inside the coil ring 5, so that the magnetic suspension liquid can be sprayed out from the nozzle 6 through the connecting pipe 7 and the coil ring 5.

[0037] An intermittent movement assembly 8 is arranged between the left mounting seat 2 and the coil ring 5. The intermittent movement assembly 8 is used to drive the coil ring 5 to move intermittently left and right. A cross magnetization assembly 9 is arranged below the coil ring 5 inside the body 1. The cross magnetization assembly 9 is used to cross magnetize the steel 3.

[0038] When performing surface defect detection, first, the steel material 3 is limited and installed between the left and right mounting seats 2. Then, the motor 4 is started, and the motor 4 drives the right mounting seat 2 to rotate, thereby driving the steel material 3 between the mounting seats 2 to rotate. During the rotation of the steel material 3, the connecting pipe 7 is connected to the magnetic suspension liquid conveying pipe, and the magnetic suspension liquid can be sprayed inward through the nozzle 6, thereby completing the spraying of the magnetic suspension liquid on the surface of the steel material 3.

[0039] At the same time, the intermittent movement component 8 is used to drive the coil ring 5 to move intermittently left and right, enabling comprehensive spraying of the steel material 3. Meanwhile, the cross magnetization component 9 is coordinated to make the coil ring 5 cross magnetize the steel material 3, resulting in a better magnetization effect. At the same time, the magnetization of the steel material 3 and the spraying of the magnetic suspension liquid are coordinated with each other, avoiding the phenomenon that the magnetic suspension liquid that has not been magnetized in time flows downward under the action of gravity, making the distribution of the magnetic suspension liquid more uniform during the magnetization process.

[0040] Furthermore, as Figures 3-6 shown, the intermittent movement component 8 includes a semi-gear 81. The semi-gear 81 is fixedly installed on the periphery of the left mounting seat 2. A threaded rod 82 is rotationally connected in a limited manner at the center inside the machine body 1. A first gear 83 is fixedly installed on the periphery of the left side of the threaded rod 82. The first gear 83 is located below the semi-gear 81, and the first gear 83 can be meshed with the semi-gear 81, so that the first gear 83 can be driven to rotate during the rotation of the semi-gear 81. A threaded sleeve 84 is threadedly connected to the outside of the threaded rod 82, and the rotation of the threaded rod 82 can drive the threaded sleeve 84 to move.

[0041] The top end of the threaded sleeve 84 extends upward to the bottom of the coil ring 5, and the top of the threaded sleeve 84 is rotationally connected in a limited manner at the bottom of the coil ring 5, so that while the threaded sleeve 84 can drive the coil ring 5 to move left and right, the coil ring 5 can also rotate relative to the threaded sleeve 84.

[0042] The principle of driving the coil ring 5 to move intermittently left and right by the intermittent movement component 8 is as follows:

[0043] During the process of driving the mounting seat 2 and the steel material 3 to rotate by the motor 4, the left mounting seat 2 can also be driven to rotate, thereby driving the semi-gear 81 to rotate by the left mounting seat 2. Through the mutual meshing of the semi-gear 81 and the first gear 83, during the rotation of the semi-gear 81, the first gear 83 can be intermittently driven to rotate. During the intermittent rotation of the first gear 83, the threaded rod 82 can also be driven to rotate intermittently. By using the threaded connection between the threaded rod 82 and the threaded sleeve 84, the threaded sleeve 84 can be driven to move intermittently left and right by controlling the forward and reverse rotation of the motor 4. By using the top end of the threaded sleeve 84 extending upward to the bottom of the coil ring 5, the coil ring 5 can also be driven to move intermittently left and right.

[0044] Furthermore, as shown in Figure 4 , Figures 6-11 , the initial deflection angle of the coil ring 5 is 45°.

[0045] The cross-magnetizing assembly 9 includes a conical ring 91. The right end of the half gear 81 is fixedly installed with the conical ring 91. Two sections of teeth 92 are fixedly installed on the periphery of the conical ring 91, and the number of teeth of the two sections of teeth 92 is the same. A bevel gear 93 is rotationally connected in a limited manner inside the body 1, and the bevel gear 93 is located right below the conical ring 91. The teeth 92 on the conical ring 91 are located on one side of the smooth area of the half gear 81, and the two sections of teeth 92 are intermittently distributed. Therefore, the meshing of the teeth 92 on the conical ring 91 with the bevel gear 93 occurs when the half gear 81 does not drive the gear one 83 to rotate. During the rotation of the conical ring 91, the teeth 92 can mesh with the bevel gear 93. The number of teeth of each of the two sections of teeth 92 is half of the number of teeth of the bevel gear 93, so that the rotation angles of the two sections of teeth 92 driving the bevel gear 93 are both 180°.

[0046] A column 94 is eccentrically fixedly installed at the bottom end of the bevel gear 93. A front slide rod 95 is connected in a limited sliding manner on the front side above the threaded rod 82 inside the body 1. A sleeve rod 96 is fixedly installed at the left end of the front slide rod 95, and the sleeve rod 96 is sleeved outside the column 94. Therefore, when the bevel gear 93 rotates, through the cooperation of the column 94 and the sleeve rod 96, the sleeve rod 96 and the front slide rod 95 can be driven to move left and right.

[0047] A rear slide rod 97 is connected in a limited sliding manner on the rear side of the front slide rod 95 inside the body 1. Hinge assemblies 98 are arranged at the tops of the left and right sides of the front slide rod 95 and the rear slide rod 97. Through the action of the hinge assemblies 98, the front slide rod 95 and the rear slide rod 97 can move in a crosswise and misaligned manner.

[0048] Among them, the hinge assembly 98 includes a hinge rod 981. The hinge rod 981 is rotationally connected in a limited manner on the left and right sides inside the body 1. The hinge rod 981 is located above the left and right sides of the front slide rod 95 and the rear slide rod 97. Waist slots 982 are symmetrically opened on the front and rear sides of the hinge rod 981. Fixed columns 983 are fixedly installed at the top ends of the left and right sides of the front slide rod 95 and the rear slide rod 97, and the fixed columns 983 are all located inside the waist slots 982. Therefore, when the front slide rod 95 moves, the rear slide rod 97 can be driven to move in the opposite direction through the action of the hinge rod 981.

[0049] On the outer sides of the front sliding rod 95 and the rear sliding rod 97, there are sliding sleeves 99 connected in a limited way. At the adjacent ends of the sliding sleeves 99, racks 910 are fixedly installed. Around the bottom of the coil ring 5, a second gear 911 is fixedly installed. The second gear 911 is located between the two sliding sleeves 99 on both sides, and the second gear 911 meshes with the front and rear racks 910. When the sliding sleeves 99 move out of position, the second gear 911 can be driven to rotate. When the front sliding rod 95 and the rear sliding rod 97 move out of position once, the angle of rotation of the second gear 911 driven by the sliding sleeves 99 and the racks 910 is 90°. Then, after the coil ring 5 is driven to rotate by the second gear 911, the position of the original coil ring 5 and the position of the rotated coil ring 5 are vertically crossed.

[0050] On the upper and lower sides inside the sliding sleeve 99, limiting grooves 912 are symmetrically opened. On the upper and lower sides of the front sliding rod 95 and the rear sliding rod 97, limiting blocks 913 are symmetrically and elastically slidably connected. And the limiting blocks 913 are evenly distributed left and right on the front sliding rod 95 and the rear sliding rod 97. The limiting blocks 913 are adapted to the limiting grooves 912, so as to limit the sliding sleeve 99 on the outer sides of the front sliding rod 95 and the rear sliding rod 97.

[0051] The principle of cross - magnetizing the steel 3 by the coil ring 5 through the cross - magnetization assembly 9 is as follows:

[0052] When the semi - gear 81 rotates to make the coil ring 5 move intermittently left and right, the rotation of the semi - gear 81 will also drive the conical ring 91 to rotate. During the rotation of the conical ring 91, by using the meshing of the teeth 92 on the conical ring 91 and the bevel gear 93, the bevel gear 93 can be driven to rotate. And by using the fact that the teeth 92 are located on one side of the smooth area of the semi - gear 81 and the design of the number of teeth of the teeth 92, when the coil ring 5 is in a static state, the steel 3 can be magnetized at an initial inclination of 45°.

[0053] Then, the tooth 92 meshes with the bevel gear 93, driving the bevel gear 93 to rotate by 180°. During the rotation of the bevel gear 93, through the cooperation of the column 94 at the bottom of the bevel gear 93 and the sleeve rod 96, the sleeve rod 96 and the front sliding rod 95 can be driven to move. During the movement of the front sliding rod 95, through the design of the hinge assembly 98 between the top of the left and right sides of the front sliding rod 95 and the rear sliding rod 97, the rear sliding rod 97 can be driven to move in the opposite direction. By using the cooperation between the limit block 913 and the limit groove 912 inside the sliding sleeve 99, when the front sliding rod 95 and the rear sliding rod 97 move in a misaligned manner in the opposite direction, the sliding sleeve 99 can also be driven to move misaligned. Furthermore, through the cooperation between the rack 910 at the adjacent end of the sliding sleeve 99 and the second gear 911, the second gear 911 can be driven to rotate, and the rotation angle is 90°. Then, through the second gear 911, the coil ring 5 is driven to rotate by 90°, so that the coil ring 5 magnetizes the steel 3 again at an angle perpendicular to the original position, thereby realizing the cross magnetization of the steel 3.

[0054] After magnetization is completed, the second tooth 92 meshes with the bevel gear 93 to make the bevel gear 93 continue to rotate by 180°. At this time, through the cooperation between the column 94 and the sleeve rod 96, the front sliding rod 95 can be driven to move back to the initial position, and at the same time, the rear sliding rod 97 is driven to move misaligned again, driving the coil ring 5 to reverse by 90° and return to the initial 45° inclination. Then, the half gear 81 will also mesh with the first gear 83 again to drive the coil ring 5 to move. During the movement of the coil ring 5, the second gear 911 will be driven to move. By using the mutual meshing between the second gear 911 and the two racks 910, the sliding sleeve 99 can be driven to move, causing the limit block 913 to elastically retract. During the intermittent movement of the sliding sleeve 99 along with the coil ring 5, it moves to the next group of limit blocks 913, re-limiting the sliding sleeve 99, and performing cross magnetization at the next stop of the coil ring 5, while spraying the magnetic suspension liquid at the same time.

[0055] It should be noted that: after the magnetic suspension liquid spraying and cross magnetization are completed from left to right, then reverse the motor 4, and at the same time stop the spraying of the magnetic suspension liquid, so that the coil ring 5 performs cross magnetization again from right to left. After magnetization is completed, the detection of the surface defects of the steel 3 is realized by observing the distribution of the magnetic powder.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for intelligently detecting surface defects of steel, comprising a body (1), characterized in that, On the left and right sides of the top of the body (1), mounting seats (2) are rotatably connected with limited positions. A steel material (3) is installed between the mounting seats (2) with limited positions. A motor (4) is fixedly installed on the right side of the body (1). The motor (4) is in transmission connection with the right mounting seat (2). In the center of the top of the body (1), a coil ring (5) is slidably connected with limited positions. Nozzles (6) are evenly fixedly installed inside the coil ring (5). At the center of the top end of the coil ring (5), a connecting pipe (7) is fixedly installed; An intermittent movement assembly (8) is arranged between the left mounting seat (2) and the coil ring (5). The intermittent movement assembly (8) is used to drive the coil ring (5) to move intermittently left and right. Below the coil ring (5) inside the body (1), a cross magnetization assembly (9) is arranged. The cross magnetization assembly (9) is used to perform cross magnetization on the steel material (3); Among them, the intermittent movement assembly (8) includes: A semi-gear (81), which is fixedly installed on the periphery of the left mounting seat (2); A threaded rod (82), which is rotatably connected with limited positions at the center inside the body (1); A first gear (83), which is fixedly installed on the periphery of the left side of the threaded rod (82). The first gear (83) is located below the semi-gear (81), and the first gear (83) can be meshed with the semi-gear (81); A threaded sleeve (84), which is threadedly connected to the outside of the threaded rod (82); The cross magnetization assembly (9) includes: A conical ring (91), which is fixedly installed at the right end of the semi-gear (81); Tooth teeth (92), two sections of tooth teeth (92) are fixedly installed on the periphery of the conical ring (91), and the number of tooth teeth of the two sections of tooth teeth (92) is the same; A bevel gear (93), which is rotatably connected with limited positions inside the body (1), and the bevel gear (93) is located at the lower right of the conical ring (91); A column (94), which is eccentrically fixedly installed at the bottom end of the bevel gear (93); A front sliding rod (95), which is slidably connected with limited positions on the front side above the threaded rod (82) inside the body (1); A sleeve rod (96), which is fixedly installed at the left end of the front sliding rod (95). The sleeve rod (96) is sleeved on the outside of the column (94); A rear sliding rod (97), which is slidably connected with limited positions on the rear side of the front sliding rod (95) inside the body (1); A hinged assembly (98), which is arranged at the top of the left and right sides of the front sliding rod (95) and the rear sliding rod (97); A sliding sleeve (99), which is slidably connected with limited positions on the outside of the front sliding rod (95) and the rear sliding rod (97); Rack bars (910), which are fixedly installed at the adjacent ends of the sliding sleeves (99); Gear two (911), a gear two (911) is fixedly installed on the periphery of the bottom of the coil ring (5), the gear two (911) is located between the two side sliding sleeves (99), and the gear two (911) meshes with the front and rear racks (910); Limit groove (912), limit grooves (912) are symmetrically opened on the upper and lower sides inside the sliding sleeve (99); Limit block (913), limit blocks (913) are symmetrically and elastically slidably connected to the upper and lower sides of the front sliding rod (95) and the rear sliding rod (97), and the limit blocks (913) are evenly distributed left and right on the front sliding rod (95) and the rear sliding rod (97), and the limit blocks (913) are adapted to the limit grooves (912).

2. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, The initial deflection angle of the coil ring (5) is 45°.

3. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, An energized coil is provided inside the coil ring (5), and the coil ring (5) is located outside the steel material (3).

4. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, A chute (11) is opened at the top of the machine body (1), and the connecting pipe (7) is limitedly slidably connected inside the chute (11), the connecting pipe (7) is communicated with the magnetic suspension liquid conveying pipe, and the connecting pipe (7) is communicated with the spray head (6) inside the coil ring (5).

5. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, The top end of the threaded sleeve (84) extends upward to the bottom of the coil ring (5), and the top of the threaded sleeve (84) is limitedly rotatably connected to the bottom of the coil ring (5).

6. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, The teeth (92) on the conical ring (91) are located on one side of the smooth area of the half gear (81), and the two sections of the teeth (92) are intermittently distributed. During the rotation of the conical ring (91), the teeth (92) can mesh with the bevel gear (93), and the number of teeth of the two sections of the teeth (92) is half of the number of teeth of the bevel gear (93).

7. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that The hinge assembly (98) includes: Hinge rod (981), hinge rods (981) are limitedly rotatably connected to the left and right sides inside the machine body (1), and the hinge rods (981) are located above the left and right sides of the front sliding rod (95) and the rear sliding rod (97); Waist slot (982), waist slots (982) are symmetrically opened on the front and rear sides of the hinge rod (981); Fixed column (983), fixed columns (983) are fixedly installed at the top ends of the left and right sides of the front sliding rod (95) and the rear sliding rod (97), and the fixed columns (983) are all located inside the waist slots (982).

8. The device for intelligently detecting surface defects of steel according to claim 1, characterized in that, When the front sliding rod (95) and the rear sliding rod (97) are displaced by one time, the angle of rotation of the gear two (911) driven by the sliding sleeve (99) and the rack (910) is 90°.

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