A defect detection device and method for large flange forgings

Abstract

The present invention relates to the technical field of flange detection devices, and discloses a defect detection device for large flange forgings, which includes a detection base. A detection mechanism is provided on the detection base, and a longitudinal sliding rod is provided on the detection base. The detection mechanism includes a longitudinal sliding sleeve slidably arranged on the longitudinal sliding rod. A supporting sliding sleeve is provided on the longitudinal sliding sleeve, and a fixing rod is slidably arranged on the supporting sliding sleeve. One end of the fixing rod is rotatably provided with an extension rod, and a detector is provided at one end of the extension rod. A bearing plate is provided at the other end of the fixing rod. A support pipe sleeve is provided on the detection base, and a centering mechanism is provided inside the support pipe sleeve. The beneficial effects of the present invention compared with the prior art are as follows: The centering mechanism can adjust the movement trajectory of the detector according to the inner diameter of the flange, improving the applicability of the device of the present invention. The detector moves in a circular trajectory, ensuring the comprehensiveness of the detection, avoiding the situation of missed detection, and improving the accuracy of flange defect detection.

Description

Technical Field

[0001] The present invention relates to the technical field of flange detection devices, and in particular to a defect detection device and method for large flange forgings. Background Art

[0002] In the pipeline systems of industries such as petroleum, chemical engineering, and natural gas, large flange forgings are key components for pipeline connection. For example, in an oil pipeline, two pipelines are connected by a flange forging, and bolts are used to fasten them together, which can ensure the sealing of the pipeline and enable the safe transportation of oil under high-pressure environments. Due to reasons such as safety, reliability, and quality control requirements, it is necessary to use a detection device to detect defects in the produced flanges.

[0003] Currently, when detecting defects in large flange forgings, it is usually to manually hold an ultrasonic detection device to detect the flange. Since the planning of the detection path depends on manually moving the ultrasonic detection device, it is easy to miss detections, and thus it is impossible to accurately detect the defects existing inside the flange forging, which affects the subsequent use of the flange. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a defect detection device and method for large flange forgings.

[0005] To solve the above technical problem, the technical solution provided by the present invention is: a defect detection device for large flange forgings, including a detection base, a detection mechanism is provided on the detection base, two groups of longitudinal sliding rods are provided on the detection base, the detection mechanism includes a longitudinal sliding sleeve slidably arranged on the longitudinal sliding rods, a supporting sliding sleeve is provided on the longitudinal sliding sleeve, the height of the supporting sliding sleeve can be adjusted according to the height of the flange, a fixing rod is slidably arranged on the supporting sliding sleeve, one end of the fixing rod is rotatably provided with an extension rod, a detector for detecting flange defects is provided at one end of the extension rod, a bearing plate is provided at the other end of the fixing rod, the bearing plate can move along a circular trajectory according to the inner diameter of the flange, a support pipe sleeve is provided on the detection base, a centering mechanism for centering the flange is provided inside the support pipe sleeve, the centering mechanism can automatically adjust the movement trajectory of the bearing plate according to the inner diameter of the flange, and a driving mechanism for driving the bearing plate to rotate is provided on the detection base.

[0006] As an improvement, a support turntable is rotatably provided on the detection base, a support sliding groove is provided on the support turntable, a support slider is slidably arranged in the support sliding groove, the support slider is slidably and rotatably matched with the bearing plate, a follower sliding plate is slidably arranged inside the support turntable, a support connecting rod rotatably connected to the support slider is rotatably provided on one side of the follower sliding plate, a positioning rod is rotatably arranged inside the follower sliding plate, and the positioning rod is driven by the centering mechanism to move along the axis of the support turntable.

[0007] As an improvement, the centering mechanism includes a centering cone sleeve and a mounting disc sequentially arranged on the support pipe sleeve. The inner side of the centering cone sleeve is a conical structure. A centering cone column is slidably arranged inside the centering cone sleeve, and the cross-section of the centering cone column is a conical structure. A plurality of mounting through holes are equidistantly arranged on the support pipe sleeve along the circumferential direction. The mounting through holes are arranged in cooperation with the centering cone sleeve. Centering sliding rods are slidably arranged in the mounting through holes. One end of each centering sliding rod is slidably matched with the centering cone column, and the other end of each centering sliding rod is provided with a centering support rod. A centering ball sleeve is sleeved on the centering support rod. A centering electric push rod for driving the centering cone column to move along the axis direction of the support pipe sleeve is arranged at the lower end of the detection base.

[0008] As an improvement, a centering spring is arranged on the centering cone column, and an adjusting stud is connected to the mounting disc by threads. The lower end of the adjusting stud is movably abutted against the centering cone column.

[0009] As an improvement, the mounting through holes are all connected with reset studs by threads. A reset spring that is movably abutted against the reset stud is arranged on the centering sliding rod, and the centering support rod penetrates through the reset stud.

[0010] As an improvement, a mating ball head column is arranged inside the centering cone column. A mating sliding column is slidably arranged at the lower end of the mating ball head column. One end of the mating sliding column extending out of the mating ball head column is provided with a centering connecting plate connected to the telescopic end of the centering electric push rod. A reversing rod is arranged on the outer wall of the mating ball head column, and an adjusting rod is arranged on the outer wall of the positioning rod. A connecting plate is rotatably arranged at the lower end of the detection base, and the two ends of the connecting plate are respectively slidably matched with the reversing rod and the adjusting rod.

[0011] As an improvement, an extension sleeve is arranged at one end of the extension rod close to the fixed rod. An extension column is slidably arranged inside the extension sleeve. An extension spring connected to the extension column is arranged inside the extension sleeve. A limiting through hole for cooperating with the extension column is arranged on the fixed rod.

[0012] As an improvement, supporting sleeves are symmetrically arranged at the upper end of the longitudinal sliding sleeve. A supporting screw sleeve connected to the supporting sliding sleeve is slidably arranged in each of the two supporting sleeves. A connecting screw rod that is in threaded cooperation with the supporting screw sleeve is rotatably arranged inside the longitudinal sliding sleeve. A connecting gear is arranged at the lower end of the connecting screw rod. An adjusting gear that meshes with the connecting gear is rotatably arranged inside the longitudinal sliding sleeve.

[0013] A method for detecting defects of large flange forgings, using the large flange forging defect detection device as described above, the steps are as follows:

[0014] Step 1: Rotate the extension rod to the vertical state, and place the flange on the detection base;

[0015] Step 2: Rotate the extension rod to the horizontal state, start the centering mechanism to adjust the axis of the flange to be collinear with the axis of the support pipe sleeve, and at the same time fix the flange from the inside of the flange.

[0016] Step 3: Adjust the position of the detector according to the inner diameter of the flange so that the detector is close to the inner wall of the flange;

[0017] Step 4: Start the detector, and drive the detector to perform a circular rotation that matches the inner diameter of the flange through the driving mechanism. The detector comprehensively inspects the flange during the movement process;

[0018] Step 5: Rotate the extension rod to the vertical state, and remove the inspected flange from the inspection base.

[0019] The beneficial effects of the present invention compared with the prior art are as follows: The centering mechanism can center and fix the flange while adjusting the movement trajectory of the bearing plate according to the inner diameter of the flange, improving the applicability of the device of the present invention. The detector inspects the flange during the movement process of the circular trajectory, and the circular movement trajectory ensures the comprehensiveness of the inspection, avoiding missed inspections and improving the accuracy of flange defect detection. Specifically:

[0020] 1. The centering mechanism drives the centering cone column through the telescopic movement of the centering electric push rod. The centering cone column drives the centering support rod and the centering ball sleeve to move synchronously to abut against the inner wall of the flange through the sliding cooperation with multiple groups of centering sliding rods, thereby realizing the centering and fixing of the flange, avoiding displacement of the flange during the inspection process, and improving the comprehensiveness and accuracy of the inspection;

[0021] 2. During the circular rotation of the support turntable, the positioning rod drives the follower slide plate to move synchronously. The synchronous slide plate drives the support slider to slide along the support chute through the support connecting rod. Due to the sliding limit of the supporting sleeve on the fixed rod and the sliding limit of the longitudinal slide rod on the longitudinal sleeve, the support slider drives the bearing plate that is slidably and rotationally matched with it to perform a circular trajectory movement, and the detector moves circularly synchronously, thereby comprehensively inspecting the flange, avoiding missed inspections during the inspection process of manually holding the inspection component in the prior art, and improving the inspection accuracy;

[0022] 3. The centering cone column drives the cooperating ball head column to move downward synchronously. During the downward movement of the reversing rod, it drives the positioning rod to move upward through the cooperation of the connecting plate and the adjusting rod. While the follower slide plate moves upward, it drives the support connecting rod to rotate, and the support connecting rod drives the support slider to move away from the axis of the support turntable, thereby realizing the adjustment of the position of the support slider, and further adjusting the movement trajectory of the monitor. The self-adaptive adjustment method reduces the setting of power components, improves the integrity of the device of the present invention, and reduces the maintenance cost. Brief Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of a large flange forging defect detection device and detection method of the present invention.

[0024] Figure 2It is an exploded view of a defect detection device and detection method for a large flange forging of the present invention.

[0025] Figure 3 It is a sectional view of a defect detection device and detection method for a large flange forging of the present invention.

[0026] Figure 4 It is an exploded view of the detection mechanism of a defect detection device and detection method for a large flange forging of the present invention.

[0027] Figure 5 It is a sectional view of the detection mechanism of a defect detection device and detection method for a large flange forging of the present invention Figure 1 .

[0028] Figure 6 It is a sectional view of the detection mechanism of a defect detection device and detection method for a large flange forging of the present invention Figure 2 .

[0029] Figure 7 It is a defect detection device and detection method for a large flange forging of the present invention Figure 6 and an enlarged view of part A therein.

[0030] Figure 8 It is an exploded view of the centering mechanism of a defect detection device and detection method for a large flange forging of the present invention.

[0031] Figure 9 It is a sectional view of the centering mechanism of a defect detection device and detection method for a large flange forging of the present invention.

[0032] Figure 10 It is a structural schematic diagram of the driving mechanism of a defect detection device and detection method for a large flange forging of the present invention.

[0033] Figure 11 It is a structural schematic diagram of the state to be detected of a defect detection device and detection method for a large flange forging of the present invention.

[0034] Figure 12 It is a structural schematic diagram of the detection state of a defect detection device and detection method for a large flange forging of the present invention.

[0035] As shown in the figure: 1. Detection base; 11. Support pipe sleeve; 111. Anti-wear pad; 112. Installation through hole; 113. Longitudinal sliding rod; 2. Detection mechanism; 21. Support turntable; 211. Support chute; 212. Support slider; 213. Follow-up slide plate; 214. Positioning rod; 215. Adjusting rod; 216. Support connecting rod; 217. Driving gear ring; 22. Bearing plate; 221. Fixed rod; 2211. Limit through hole; 222. Extension rod; 2221. Extension sleeve; 2222. Extension column; 2223. Extension spring; 23. Detector; 24. Connecting plate; 25. Longitudinal sliding sleeve; 251. Support sleeve; 252. Support screw sleeve; 253. Support sliding sleeve; 254. Connecting screw; 255. Connecting gear; 256. Adjusting gear; 3. Centering mechanism; 31. Installation disk; 311. Adjusting stud; 32. Centering cone sleeve; 321. Centering cone column; 322. Centering spring; 33. Centering sliding rod; 331. Return spring; 332. Return stud; 333. Centering ball sleeve; 334. Centering support rod; 34. Matching ball head column; 341. Reversing rod; 342. Matching sliding column; 343. Centering electric push rod; 344. Centering connecting plate; 4. Driving mechanism; 41. Driving gear; 411. Driving worm gear; 42. Driving worm; 421. Crank handle. Detailed implementation manner

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] Combined with the attached Figure 1 、 attached Figure 2 、 attached Figure 3 And the attached Figure 4 As shown in the figure, a defect detection device for large flange forgings includes a detection base 1. An anti-wear pad 111 is provided on the detection base 1. A detection mechanism 2 is provided on the detection base 1. A longitudinal sliding rod 113 is provided on the detection base 1, and two groups of longitudinal sliding rods 113 are provided. The detection mechanism 2 includes a longitudinal sliding sleeve 25 slidably arranged on the longitudinal sliding rod 113. A support sliding sleeve 253 is provided on the longitudinal sliding sleeve 25. The height of the support sliding sleeve 253 can be adjusted according to the height of the flange. A fixed rod 221 is slidably arranged on the support sliding sleeve 253. One end of the fixed rod 221 is rotatably provided with an extension rod 222. The outer diameters of the fixed rod 221 and the extension rod 222 are the same. One end of the extension rod 222 is provided with a detector 23 for detecting flange defects. The detector 23 is an ultrasonic detector 23, which is the current existing technology and will not be elaborated here. The other end of the fixed rod 221 is provided with a bearing plate 22. The bearing plate 22 can move in a circular trajectory according to the inner diameter of the flange. A support pipe sleeve 11 is provided on the detection base 1. A centering mechanism 3 for centering the flange is provided in the support pipe sleeve 11. The centering mechanism 3 can automatically adjust the movement trajectory of the bearing plate 22 according to the inner diameter of the flange. A driving mechanism 4 for driving the bearing plate 22 to rotate is provided on the detection base 1.

[0038] Working principle of the present invention: The driving mechanism 4 provides power for the movement of the carrier plate 22 along a circular trajectory. During the movement of the carrier plate 22, the fixed rod 221, the extension rod 222 and the detector 23 are driven to perform circular motion synchronously. During the circular motion of the detector 23, the flange can be detected from the inner side of the flange. The circular motion trajectory ensures the comprehensiveness of the detection and avoids missed detection. At the same time, the centering mechanism 3 can center and fix the flange. During this process, the centering mechanism 3 can adjust the motion trajectory of the carrier plate 22 according to the inner diameter of the flange, so that the device of the present invention is applicable to flanges with different inner diameters, improves the applicability of the device of the present invention, and is convenient for popularization and use.

[0039] Combined with the attached Figure 2 、attached Figure 3 、attached Figure 8 And attached Figure 9 As shown, the centering mechanism 3 includes a centering cone sleeve 32 and a mounting plate 31 arranged in sequence on the support tube sleeve 11. The centering cone sleeve 32 and the mounting plate 31 are connected to the support tube sleeve 11 by bolts. The inner side of the centering cone sleeve 32 is a conical structure. A centering cone column 321 is slidably arranged inside the centering cone sleeve 32. The cross-section of the centering cone column 321 is a conical structure. A plurality of mounting through holes 112 are equidistantly arranged on the support tube sleeve 11 along the circumferential direction. The mounting through holes 112 are arranged in cooperation with the centering cone sleeve 32. Centering slide rods 33 are slidably arranged in the mounting through holes 112. Limit grooves are formed on the centering slide rods 33. The support tube sleeve 11 is bolted to cooperate with the limit grooves to slide and limit the centering slide rods 33. One end of the centering slide rod 33 is slidably matched with the centering cone column 321. The other end of the centering slide rod 33 is provided with a centering support rod 334. A centering ball sleeve 333 is sleeved on the centering support rod 334. A centering electric push rod 343 for driving the centering cone column 321 to move along the axis direction of the support tube sleeve 11 is arranged at the lower end of the detection base 1. The mounting through holes 112 are all connected with a reset stud 332 by threads. A reset spring 331 that is movably abutted against the reset stud 332 is arranged on the centering slide rod 33. The centering support rod 334 penetrates through the reset stud 332.

[0040] Working principle of the centering mechanism 3: The centering electric push rod 343 extends, driving the centering cone column 321 to move downward along the axis of the support tube sleeve 11. During this process, the centering cone column 321 simultaneously pushes multiple groups of centering sliding rods 33 to slide away from the axis of the support tube sleeve 11 along the installation through hole 112. The centering support rod 334 drives the centering ball sleeve 333 to move synchronously until it abuts against the inner wall of the flange. The combined action of multiple groups of centering ball sleeves 333 performs self-centering and fixation on the flange, preventing the flange from shifting during the detection process and improving the comprehensiveness and accuracy of the detection. At this time, the flange can be detected. Meanwhile, the centering sliding rod 33 squeezes the return spring 331, and the return spring 331 contracts and stores energy under the force. After the detection is completed, the centering electric push rod 343 shortens, the centering cone column 321 moves upward along the axis of the support tube sleeve 11, the return spring 331 gradually returns to its original position and pushes the centering sliding rod 33 to slide along the installation through hole 112 towards the axis of the support tube sleeve 11. The centering support rod 334 drives the centering ball sleeve 333 to move synchronously, and multiple groups of centering ball sleeves 333 are separated from the inner wall of the flange synchronously, realizing the relaxation of the flange. At this time, the detected flange can be transferred out of the device of the present invention.

[0041] Combined with attached Figure 2 attached Figure 3 attached Figure 4 attached Figure 5 and attached Figure 10 As shown in attached

[0042] On the detection base 1, a support turntable 21 is rotatably provided. On the support turntable 21, a support chute 211 is provided. In the support chute 211, a support slider 212 is slidably provided. The support slider 212 is slidably and rotatably matched with the bearing plate 22. Inside the support turntable 21, a follower slide plate 213 is slidably provided. On one side of the follower slide plate 213, a support connecting rod 216 rotatably connected to the support slider 212 is rotatably provided. Inside the follower slide plate 213, a positioning rod 214 is rotatably provided. The positioning rod 214 is driven by the centering mechanism 3 to move along the axis of the support turntable 21.

[0043] Working principle of the detector 23 moving in a circular trajectory: Rotate the crank 421, drive the worm 42, drive the driving gear 41 through the driven worm gear 411, and drive the support turntable 21 to rotate in a circle through the driving tooth ring 217 meshing with it. During this process, the centering mechanism 3 drives the positioning rod 214 to move along the axis of the support turntable 21 according to the inner diameter of the flange. The positioning rod 214 drives the follower slide plate 213 to move synchronously. The follower slide plate 213 drives the support slider 212 to slide along the support chute 211 through the support connecting rod 216. Due to the sliding limit of the supporting sleeve 253 on the fixed rod 221 and the sliding limit of the longitudinal slide rod 113 on the longitudinal sleeve 25, the support slider 212 drives the bearing plate 22 that is slidably and rotationally matched with it to move in a circular trajectory. The fixed rod 221 drives the detector 23 to move in a circle synchronously through the extension rod 222 to comprehensively detect the flange. Further, since the centering mechanism 3 can drive the positioning rod 214 to move along the axis of the support turntable 21 according to the inner diameter of the flange, the bearing plate 22 can automatically adjust the movement trajectory according to the inner diameter of the flange, facilitating the detection of flanges with different inner diameters and improving the applicability of the device of the present invention.

[0044] Combined with the attached Figure 4 、the attached Figure 5 、the attached Figure 8 and the attached Figure 9 As shown, a centering spring 322 is provided on the centering conical column 321. An adjusting stud 311 is threadedly connected to the mounting plate 31. An adjusting groove is provided at the upper end of the adjusting stud 311. The lower end of the adjusting stud 311 is in movable abutment with the centering conical column 321. A mating ball head column 34 is provided inside the centering conical column 321. A mating slide column 342 is slidably provided at the lower end of the mating ball head column 34. One end of the mating slide column 342 extending out of the mating ball head column 34 is provided with a centering connecting plate 344 connected to the telescopic end of the centering electric push rod 343. A reversing rod 341 is provided on the outer wall of the mating ball head column 34. An adjusting rod 215 is provided on the outer wall of the positioning rod 214. A connecting plate 24 is rotatably provided at the lower end of the detection base 1. The two ends of the connecting plate 24 are respectively in sliding fit with the reversing rod 341 and the adjusting rod 215.

[0045] Working principle of the reversing rod 341 driving the adjusting rod 215 to move: In the initial state, the centering spring 322 drives the centering cone column 321 to maintain a downward movement trend along the axis direction of the centering cone sleeve 32 through deformation. The centering cone column 321 cooperates with the centering ball sleeve 333 through the centering slide rod 33 and the centering support rod 334 to perform primary positioning on the flange. During this process, the centering cone column 321 drives the mating ball head column 34 to move downward synchronously. Since the centering electric push rod 343 is not activated, the centering connecting plate 344 is stationary, and relative sliding occurs between the mating ball head column 34 and the mating slide column 342. The mating ball head column 34 drives the reversing rod 341 to move downward. The reversing rod 341 drives the positioning rod 214 to move upward through the cooperation of the connecting plate 24 and the adjusting rod 215. While the follower slide plate 213 moves upward, it drives the support connecting rod 216 to rotate. The support connecting rod 216 drives the support slider 212 to move away from the axis direction of the support turntable 21, thereby realizing the initial position adjustment of the support slider 212;

[0046] Further, when the centering electric push rod 343 extends, the telescopic end of the centering electric push rod 343 drives the centering connecting plate 344 to move downward synchronously. When the centering connecting plate 344 drives the mating slide column 342 to move downward to the limit position of the mating ball head column 34, the centering electric push rod 343 continues to extend. The centering connecting plate 344 can drive the mating ball head column 34 to move through the mating slide column 342, thereby performing precise centering on the flange and precisely adjusting the position of the support slider 212.

[0047] Combined with Att Figure 4 、Att Figure 5 、Att Figure 6 、Att Figure 7 、Att Figure 11 And Att Figure 12 As shown in the attached figures, an extension sleeve 2221 is provided at one end of the extension rod 222 close to the fixed rod 221. An extension column 2222 is slidably arranged in the extension sleeve 2221. An extension spring 2223 connected to the extension column 2222 is provided in the extension sleeve 2221. A limiting through hole 2211 cooperating with the extension column 2222 is provided on the fixed rod 221, and a slope is provided on one side of the limiting through hole 2211.

[0048] Working principle of the rotation of the extension column 2222: When the device of the present invention is in the detection state of the attached figure, the extension rod 222 abuts against the end face of the fixed rod 221, and the axes of the extension rod 222 and the fixed rod 221 are collinear. Thus, both the extension rod 222 and the fixed rod 221 can perform relative sliding with the supporting sliding sleeve 253. After the detection is completed, the extension rod 222 is rotated so that the extension rod 222 and the fixed rod 221 are in the attached figure Figure 12 's detection state, the extension rod 222 abuts against the end face of the fixed rod 221, and the axes of the extension rod 222 and the fixed rod 221 are collinear. Thus, both the extension rod 222 and the fixed rod 221 can perform relative sliding with the supporting sliding sleeve 253. After the detection is completed, the extension rod 222 is rotated so that the extension rod 222 and the fixed rod 221 are in the attached figure Figure 11In the to-be-inspected state, during this process, the extension sleeve 2221 drives the extension column 2222 and the extension spring 2223 to rotate synchronously until the extension column 2222 slides into the limit through-hole 2211, thereby realizing the positioning of the extension rod 222. In this state, the flange can be conveniently transferred out of or into the device of the present invention.

[0049] Combined with the attached Figure 2 and the attached Figure 3 and the attached Figure 4 and the attached Figure 5 As shown, symmetrically arranged supporting sleeves 251 are provided at the upper end of the longitudinal sliding sleeve 25. A supporting screw sleeve 252 connected to the supporting sliding sleeve 253 is slidably arranged in each of the two groups of supporting sleeves 251. A connecting screw rod 254 that is in threaded cooperation with the supporting screw sleeve 252 is rotatably arranged in the longitudinal sliding sleeve 25. A connecting gear 255 is provided at the lower end of the connecting screw rod 254. An adjusting gear 256 that meshes with the connecting gear 255 is rotatably arranged in the longitudinal sliding sleeve 25.

[0050] The working principle of the height adjustment of the supporting sliding sleeve 253: When the adjusting gear 256 rotates, the adjusting gear 256 drives the corresponding connecting screw rod 254 to rotate through the connecting gear 255 that meshes with it. The connecting screw rod 254 drives the corresponding supporting screw sleeve 252 to slide along the supporting sleeve 251 through the thread. The moving directions of the two groups of supporting screw sleeves 252 are the same. While the supporting screw sleeve 252 moves, it drives the supporting sliding sleeve 253 connected to it to move synchronously. The supporting sliding sleeve 253 drives the fixed rod 221 and the extension rod 222 to adjust the height, thereby adjusting the height of the detector 23, so that the device of the present invention can be applicable to flange detection operations of different heights.

[0051] Combined with the attached Figure 1 and the attached Figure 4 and the attached Figure 8 and the attached Figure 9 As shown, a method for detecting defects in large flange forgings, using the large flange forging defect detection device described above, the steps are as follows:

[0052] Step 1: Rotate the extension rod 222 until the extension column 2222 is inserted into the limit through-hole 2211. The extension rod 222 is in a vertical state. Place the flange on the detection base 1, and the support tube sleeve 11 is in the hollow position of the flange.

[0053] Step 2: Rotate the extension rod 222 so that the extension rod 222 abuts against the fixed rod 221. The extension rod 222 is in a horizontal state. Operate the centering electric push rod 343 to extend, and cooperate with the ball head column 34 to drive the centering cone column 321 to move downward. The centering cone column 321 pushes the centering slide rod 33 so that all the groups of centering ball heads are in contact with the inner side surface of the flange. While fixing the flange, the axis of the flange is collinear with the axis of the support tube sleeve 11, and the flange is fixed from the inside of the flange.

[0054] Step 3: Adjust the position of the detector 23 according to the inner diameter of the flange so that the detector 23 is close to the inner wall of the flange;

[0055] Step 4: Start the detector 23, drive the support turntable 21 to rotate through the driving mechanism 4, the support turntable 21 drives the support slider 212 to perform a circular rotation matching the inner diameter of the flange, and the detector 23 comprehensively detects the flange during the movement process;

[0056] Step 5: Rotate the extension rod 222 until the extension column 2222 is inserted into the limit through hole 2211, the extension rod 222 is in a vertical state, and remove the detected flange from the detection base 1.

[0057] When the present invention is specifically implemented, first select a detector 23 with a suitable frequency and type according to needs. For a relatively thick flange, a detector 23 with a lower frequency can be selected to ensure that ultrasonic waves can effectively penetrate the material. At the same time, a coupling agent can be applied to the flange to reduce the reflection loss between the detector 23 and the flange surface;

[0058] After that, rotate the extension rod 222 clockwise so that the extension column 2222 is inserted into the limit through hole 2211, and the extension rod 222 and the fixed rod 221 remain perpendicular to each other. At this time, the upper space of the support sleeve 11 is unobstructed. Operate the centering electric push rod 343 to shorten, and the centering slide rod 33 drives the centering ball sleeve 333 to move and retract into the installation through hole 112. Place the flange to be detected on the support sleeve 11, and the lower end face of the flange contacts the anti-wear pad 111 to prevent the flange from being worn during the detection process;

[0059] After that, operate the centering electric push rod 343 to extend, the centering connecting plate 344 drives the cooperating ball head column 34 to move through the cooperating slide column 342 to accurately center the flange. At the same time, the reversing rod 341 drives the positioning rod 214 to move upward through the cooperation of the connecting plate 24 and the adjusting rod 215. While the follower slide plate 213 moves upward, it drives the support slider 212 to move away from the axis of the support turntable 21 through the support link 216 to complete the adjustment of the position of the support slider 212;

[0060] Then, rotate the extension rod 222 so that the extension rod 222 abuts against the end face of the fixed rod 221. At this time, the axis of the extension rod 222 is collinear with the axis of the fixed rod 221. Rotate the crank 421, and the driving worm 42 drives the support turntable 21 to perform a circular rotation through the cooperation of the driving worm gear 411, the driving gear 41 and the driving tooth ring 217. The support slider 212 drives the bearing plate 22 to perform a circular motion trajectory, and the fixed rod 221 drives the detector 23 to synchronously perform a circular motion through the extension rod 222, so as to comprehensively detect the flange;

[0061] After the detection is completed, rotate the extension rod 222 clockwise to insert the extension column 2222 into the limit through hole 2211. Keep the extension rod 222 perpendicular to the fixed rod 221, and then transfer the detected flange out of the device of the present invention.

[0062] The above description of the present invention and its implementation manners is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A defect detection device for large flange forgings, comprising a detection base (1), on which a detection mechanism (2) is provided, and characterized in that: On the detection base (1), there are two sets of longitudinal sliding rods (113). The detection mechanism (2) includes a longitudinal sliding sleeve (25) slidably arranged on the longitudinal sliding rods (113). On the longitudinal sliding sleeve (25), there is a supporting sliding sleeve (253), the height of which can be adjusted according to the height of the flange. A fixing rod (221) is slidably arranged on the supporting sliding sleeve (253). One end of the fixing rod (221) is rotatably provided with an extension rod (222), and one end of the extension rod (222) is provided with a detector (23) for detecting flange defects. The other end of the fixing rod (221) is provided with a bearing plate (22), and the bearing plate (22) can move along a circular trajectory according to the inner diameter of the flange; On the detection base (1), there is a support pipe sleeve (11). Inside the support pipe sleeve (11), there is a centering mechanism (3) for centering the flange. The centering mechanism (3) can automatically adjust the movement trajectory of the bearing plate (22) according to the inner diameter of the flange. On the detection base (1), there is a driving mechanism (4) for driving the bearing plate (22) to rotate; On the detection base (1), there is a support turntable (21) rotatably arranged. On the support turntable (21), there is a support chute (211). Inside the support chute (211), there is a support slider (212), which is slidably and rotatably matched with the bearing plate (22). Inside the support turntable (21), there is a follower slide plate (213). On one side of the follower slide plate (213), there is a support connecting rod (216) rotatably connected to the support slider (212). Inside the follower slide plate (213), there is a positioning rod (214), which is driven by the centering mechanism (3) to move along the axis of the support turntable (21); The centering mechanism (3) includes a centering cone sleeve (32) and a mounting disc (31) sequentially arranged on the support pipe sleeve (11). The inner side of the centering cone sleeve (32) is a conical structure. Inside the centering cone sleeve (32), there is a centering cone column (321) with a conical cross-section. On the support pipe sleeve (11), there are multiple groups of mounting through holes (112) equidistantly arranged along the circumferential direction. The mounting through holes (112) are arranged in cooperation with the centering cone sleeve (32). Inside each mounting through hole (112), there is a centering slide rod (33). One end of the centering slide rod (33) is slidably matched with the centering cone column (321), and the other end of the centering slide rod (33) is provided with a centering support rod (334). A centering ball sleeve (333) is sleeved on the centering support rod (334). At the lower end of the detection base (1), there is a centering electric push rod (343) for driving the centering cone column (321) to move along the axis direction of the support pipe sleeve (11); The mounting through holes (112) are all threadedly connected with reset studs (332). A reset spring (331) that is movably abutted against the reset stud (332) is provided on the centering slide bar (33). The centering support rod (334) penetrates through the reset stud (332); A centering spring (322) is provided on the centering cone column (321). An adjusting stud (311) is threadedly connected to the mounting plate (31). The lower end of the adjusting stud (311) is movably abutted against the centering cone column (321); A mating ball head column (34) is provided inside the centering cone column (321). A mating slide column (342) is slidably provided at the lower end of the mating ball head column (34). A centering connecting plate (344) connected to the telescopic end of the centering electric push rod (343) is provided at one end of the mating slide column (342) extending out of the mating ball head column (34); A reversing rod (341) is provided on the outer wall of the mating ball head column (34). An adjusting rod (215) is provided on the outer wall of the positioning rod (214). A connecting plate (24) is rotatably provided at the lower end of the detection base (1). The two ends of the connecting plate (24) are respectively in sliding fit with the reversing rod (341) and the adjusting rod (215).

2. The defect detection device for a large flange forging according to claim 1, wherein: An extension sleeve (2221) is provided at one end of the extension rod (222) close to the fixed rod (221). An extension column (2222) is slidably provided inside the extension sleeve (2221). An extension spring (2223) connected to the extension column (2222) is provided inside the extension sleeve (2221). A limiting through hole (2211) that cooperates with the extension column (2222) is provided on the fixed rod (221).

3. The defect detection device for a large flange forging according to claim 1, characterized in that: Support sleeves (251) are symmetrically provided at the upper end of the longitudinal sliding sleeve (25). Support screw sleeves (252) connected to the support sliding sleeve (253) are slidably provided inside the two support sleeves (251). A connecting screw rod (254) that is in threaded fit with the support screw sleeve (252) is rotatably provided inside the longitudinal sliding sleeve (25). A connecting gear (255) is provided at the lower end of the connecting screw rod (254). An adjusting gear (256) that meshes with the connecting gear (255) is rotatably provided inside the longitudinal sliding sleeve (25).

4. A method for detecting defects in large flange forgings, using the large flange forging defect detection device described in any one of claims 1-3, characterized in that: The steps are as follows: Step 1: Rotate the extension rod (222) to the vertical state, and place the flange on the detection base (1); Step 2: Rotate the extension rod (222) to the horizontal state, start the centering mechanism (3) to adjust the axis of the flange to be collinear with the axis of the support pipe sleeve (11), and at the same time fix the flange from the inside of the flange; Step 3: According to the inner diameter size of the flange, adjust the position of the detector (23) so that the detector (23) is close to the inner wall of the flange; Step 4: Start the detector (23), drive the detector (23) to perform a circumferential rotation that matches the inner diameter of the flange through the driving mechanism (4), and the detector (23) comprehensively detects the flange during the movement; Step 5: Rotate the extension rod (222) to the vertical state, and remove the detected flange from the detection base (1).

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