Defect detection device and detection method for large flange forgings

Abstract

The invention relates to the technical field of flange detection devices, and discloses a large flange forge piece defect detection device which comprises a detection base, a detection mechanism is arranged on the detection base, a longitudinal sliding rod is arranged on the detection base, the detection mechanism comprises a longitudinal sliding sleeve arranged on the longitudinal sliding rod in a sliding mode, and a bearing sliding sleeve is arranged on the longitudinal sliding sleeve. A fixed rod is slidably arranged on the bearing sliding sleeve, an extension rod is rotatably arranged at one end of the fixed rod, a detector is arranged at one end of the extension rod, a bearing plate is arranged at the other end of the fixed rod, a supporting pipe sleeve is arranged on the detection base, and a centering mechanism is arranged in the supporting pipe sleeve; compared with the prior art, the flange defect detection device has the beneficial effects that the centering mechanism can adjust the movement track of the detector according to the inner diameter of a flange, the applicability of the device is improved, the detector moves along the circumferential track, the comprehensiveness of detection is guaranteed, the situation of missing detection is avoided, and the accuracy of flange defect detection is improved.

Description

Technical Field

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

[0002] In the pipeline systems of the petroleum, chemical, natural gas and other industries, large flange forgings are key components for pipeline connections. For example, in an oil pipeline, two pipes are connected by flange forgings and fastened together with bolts to ensure the sealing of the pipeline and enable the safe transportation of oil under high pressure. However, for reasons of safety, reliability and quality control requirements, it is necessary to use detection equipment to detect defects in the produced flanges.

[0003] At present, when inspecting defects of large flange forgings, the flanges are usually inspected by manually holding ultrasonic detection devices. Since the planning of the detection path relies on manually moving ultrasonic detection devices, this detection method is prone to missed detections, and thus cannot accurately detect defects inside the flange forgings, affecting 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 large flange forging defect detection device and detection method.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: a large flange forging defect detection device, comprising a detection base, a detection mechanism is provided on the detection base, a longitudinal slide bar is provided on the detection base, and two groups of longitudinal slide bars are arranged, the detection mechanism comprises a longitudinal sliding sleeve slidably arranged on the longitudinal slide bar, 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 fixed rod is slidably provided on the supporting sliding sleeve, an extension rod is rotatably provided at one end of the fixed 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 fixed rod, the bearing plate can move in a circular trajectory according to the inner diameter of the flange, a supporting pipe sleeve is provided on the detection base, a centering mechanism for centering the flange is provided in the supporting 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 supporting turntable is rotatably provided on the detection base, a supporting slide groove is provided on the supporting turntable, a supporting slider is slidably provided in the supporting slide groove, the supporting slider cooperates with the bearing plate to slide and rotate, a follow-up slide is slidably provided in the supporting turntable, a supporting connecting rod rotatably connected to the supporting slider is rotatably provided on one side of the follow-up slide, a positioning rod is rotatably provided in the follow-up slide, and the positioning rod is driven by a centering mechanism to move along the axis of the supporting turntable.

[0007] As an improvement, the centering mechanism includes a centering cone sleeve and a mounting plate which are sequentially arranged on the supporting sleeve. The inner side of the centering cone sleeve is a conical structure. A centering cone column is slidably arranged in the centering cone sleeve. The cross section of the centering cone column is a conical structure. A plurality of groups of mounting through holes are equidistantly arranged on the supporting sleeve along the circumferential direction. The mounting through holes are matched with the centering cone sleeve. A centering slide rod is slidably arranged in the mounting through holes. One end of the centering slide rod is slidably matched with the centering cone column. A centering support rod is provided at the other end of the centering slide rod. A centering ball sleeve is sleeved on the centering support rod. A centering electric push rod is provided at the lower end of the detection base for driving the centering cone column to move along the axial direction of the supporting sleeve.

[0008] As an improvement, a centering spring is provided on the centering cone column, and an adjusting stud is connected to the mounting plate via threads, and 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 via threads, the centering slide rod is provided with a reset spring movably abutting against the reset studs, and the centering support rod passes through the reset studs.

[0010] As an improvement, a matching ball head column is provided in the centering cone column, a matching sliding column is slidably provided at the lower end of the matching ball head column, and a centering connecting plate connected to the telescopic end of the centering electric push rod is provided at one end of the matching sliding column extending from the matching ball head column. A reversing rod is provided on the outer wall of the matching ball head column, and an adjusting rod is provided on the outer wall of the positioning rod. A connecting plate is rotatably provided 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 provided at one end of the extension rod near the fixed rod, an extension column is slidably provided in the extension sleeve, an extension spring connected to the extension column is provided in the extension sleeve, and a limiting through hole cooperating with the extension column is provided on the fixed rod.

[0012] As an improvement, a supporting sleeve is symmetrically provided at the upper end of the longitudinal sleeve, and a supporting screw sleeve connected to the supporting sleeve is slidably provided in the two groups of supporting sleeves. A connecting screw rod that is threadably matched with the supporting screw sleeve is rotatably provided in the longitudinal sleeve, a connecting gear is provided at the lower end of the connecting screw rod, and an adjusting gear that meshes with the connecting gear is rotatably provided in the longitudinal sleeve.

[0013] A large flange forging defect detection method, using the large flange forging defect detection device, the steps are as follows: Step 1: Turn the extension rod to a vertical position and place the flange on the detection base; Step 2: Rotate the extension rod to a horizontal state, start the centering mechanism to adjust the flange axis and the support sleeve axis to be in line, and fix the flange from the inside of the flange; Step 3: Adjust the detector position according to the inner diameter of the flange so that the detector is close to the inner wall of the flange; Step 4: Start the detector, and drive the detector to rotate in a circle matching the inner diameter of the flange through the driving mechanism. The detector performs a comprehensive inspection of the flange during the movement; Step 5: Turn the extension rod to a vertical position and move the tested flange out of the test base.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the centering mechanism can center the flange and fix the flange at the same time, and the motion trajectory of the bearing plate can be adjusted according to the inner diameter of the flange, thereby improving the applicability of the device of the present invention. The detector detects the flange during the movement of the circular trajectory. The circular motion trajectory ensures the comprehensiveness of the detection, avoids the occurrence of missed detection, and improves the accuracy of flange defect detection. Specifically: 1. The centering mechanism drives the centering cone column by telescoping 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 sliding cooperation with multiple sets of centering slide rods, thereby realizing the centering and fixing of the flange, avoiding displacement of the flange during the detection process, and improving the comprehensiveness and accuracy of the detection; 2. During the circular rotation of the support turntable, the positioning rod drives the follower slide to move synchronously, and the synchronous slide drives the support slide to slide along the support slide groove through the support connecting rod. Since the support slide sleeve is limited to the sliding position of the fixed rod and the longitudinal slide rod is limited to the sliding position of the longitudinal slide sleeve, the support slide drives the bearing plate that cooperates with its sliding rotation to move in a circular trajectory, and the detector performs a circular motion synchronously, thereby performing a comprehensive inspection of the flange, avoiding the situation that the existing manual handheld inspection components are missed during the inspection process, and improving the accuracy of the inspection; 3. The centering cone column drives the matching ball head column to move downward synchronously. During the downward movement of the reversing rod, the positioning rod is driven to move upward through the cooperation of the connecting plate and the adjusting rod. The follow-up slide moves upward while driving the supporting connecting rod to rotate. The supporting connecting rod drives the supporting slider to move away from the axis of the supporting turntable, thereby adjusting the position of the supporting slider and then adjusting the motion trajectory of the monitor. The adaptive adjustment method reduces the setting of power components, improves the integrity of the device of the present invention, and reduces maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The invention discloses a structural schematic diagram of a large flange forging defect detection device and a detection method.

[0016] Figure 2 It is an exploded view of a large flange forging defect detection device and detection method of the present invention.

[0017] Figure 3 It is a cross-sectional view of a large flange forging defect detection device and detection method of the present invention.

[0018] Figure 4 It is an exploded view of a large flange forging defect detection device and detection method detection mechanism of the present invention.

[0019] Figure 5 This is a cross-sectional view of a large flange forging defect detection device and detection method detection mechanism of the present invention Figure 1 .

[0020] Figure 6 This is a cross-sectional view of a large flange forging defect detection device and detection method detection mechanism of the present invention Figure 2 .

[0021] Figure 7 The present invention is a large flange forging defect detection device and detection method Figure 6 Enlarged view of part A.

[0022] Figure 8 It is an exploded view of a large flange forging defect detection device and a centering mechanism of a detection method according to the present invention.

[0023] Fig. 9 It is a cross-sectional view of a large flange forging defect detection device and a centering mechanism of a detection method according to the present invention.

[0024] Fig.10 The invention discloses a structural schematic diagram of a large flange forging defect detection device and a detection method driving mechanism.

[0025] Fig.11 The present invention is a structural schematic diagram of a large flange forging defect detection device and a detection method in a waiting state.

[0026] Fig.12 It is a structural schematic diagram of the detection state of a large flange forging defect detection device and detection method of the present invention.

[0027] As shown in the figure: 1. Detection base; 11. Support sleeve; 111. Anti-wear pad; 112. Mounting through hole; 113. Longitudinal slide bar; 2. Detection mechanism; 21. Support turntable; 211. Support slide groove; 212. Support slider; 213. Follow-up slide plate; 214. Positioning rod; 215. Adjustment rod; 216. Support connecting rod; 217. Drive gear ring; 22. Carrying plate; 221. Fixed rod; 2211. Limiting through hole; 222. Extension rod; 2221. Extension sleeve; 2222. Extension column; 2223. Extension spring; 23. Detector; 24. Connecting plate; 25. Longitudinal sleeve; 251. Support sleeve; 252. Supporting screw sleeve; 253, supporting sliding sleeve; 254, connecting screw; 255, connecting gear; 256, adjusting gear; 3, centering mechanism; 31, mounting plate; 311, adjusting stud; 32, centering cone sleeve; 321, centering cone column; 322, centering spring; 33, centering slide rod; 331, reset spring; 332, reset stud; 333, centering ball sleeve; 334, centering support rod; 34, matching ball head column; 341, reversing rod; 342, matching slide column; 343, centering electric push rod; 344, centering connecting plate; 4, driving mechanism; 41, driving gear; 411, driving worm wheel; 42, driving worm; 421, crank. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] Combined with Figure 1 , Attachment Figure 2 , Attachment Figure 3 With attached Figure 4 As shown, a large flange forging defect detection device 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 slide bar 113 is provided on the detection base 1, and two groups of longitudinal slide bars 113 are provided. The detection mechanism 2 includes a longitudinal sliding sleeve 25 slidably arranged on the longitudinal slide bar 113, a supporting sliding sleeve 253 is provided on the longitudinal sliding sleeve 25, and the height of the supporting sliding sleeve 253 can be adjusted according to the flange height, a fixed rod 221 is slidably provided on the supporting sliding sleeve 253, and an extension rod 222 is rotatably provided at one end of the fixed rod 221, and the fixed rod 221 and the extension rod 222 are connected to each other. 222 have the same outer diameter. A detector 23 for detecting flange defects is provided at one end of the extension rod 222. The detector 23 is an ultrasonic detector 23. This is the current existing technology and will not be described in detail here. A bearing plate 22 is provided at the other end of the fixed rod 221. The bearing plate 22 can move in a circular trajectory according to the inner diameter of the flange. A supporting sleeve 11 is provided on the detection base 1. A centering mechanism 3 for centering the flange is provided in the supporting 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.

[0030] The working principle of the present invention is as follows: the driving mechanism 4 provides power for the movement of the supporting plate 22 in a circular trajectory. During the movement, the supporting plate 22 drives the fixing rod 221, the extension rod 222 and the detector 23 to perform circular motion synchronously. The detector 23 can detect the flange from the inside of the flange during the movement of the circular trajectory. The circular motion trajectory ensures the comprehensiveness of the detection and avoids missed detection. At the same time, the centering mechanism 3 can fix the flange while centering the flange. During this process, the centering mechanism 3 can adjust the motion trajectory of the supporting plate 22 according to the inner diameter of the flange, so that the device of the present invention is suitable for flanges with different inner diameters, thereby improving the applicability of the device of the present invention and facilitating its popularization and use.

[0031] Combined with Figure 2 , Attachment Figure 3 , Attachment Figure 8 With attached Fig. 9 As shown, the centering mechanism 3 includes a centering cone sleeve 32 and a mounting plate 31 which are sequentially arranged on the support sleeve 11. The centering cone sleeve 32 and the mounting plate 31 are connected to the support 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 in the centering cone sleeve 32. The cross section of the centering cone column 321 is a conical structure. A plurality of groups of mounting through holes 112 are equidistantly arranged on the support sleeve 11 along the circumferential direction. The mounting through holes 112 are matched with the centering cone sleeve 32. A centering slide bar 33 is slidably arranged in the mounting through holes 112. A limiting groove is provided on the centering slide bar 33. The centering slide rod 33 is limited in sliding position by the cooperation of the bolt and the limiting groove. One end of the centering slide rod 33 is slidably cooperated with the centering cone column 321. The other end of the centering slide rod 33 is provided with a centering support rod 334. The centering support rod 334 is provided with a centering ball sleeve 333. The lower end of the detection base 1 is provided with a centering electric push rod 343 for driving the centering cone column 321 to move along the axial direction of the support sleeve 11. The mounting through holes 112 are all connected with reset studs 332 through threads. The centering slide rod 33 is provided with a reset spring 331 that is movably abutted against the reset stud 332. The centering support rod 334 passes through the reset stud 332.

[0032] Working principle of the centering mechanism 3: the centering electric push rod 343 extends, and the centering electric push rod 343 drives the centering cone column 321 to move downward along the axis direction of the support sleeve 11. During this process, the centering cone column 321 synchronously pushes the multiple sets of centering slide rods 33 to slide along the mounting through hole 112 away from the axis direction of the support sleeve 11, and 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 multiple sets of centering ball sleeves 333 work together to self-center the flange and fix it at the same time, avoiding displacement of the flange during the detection process, thereby improving the comprehensiveness and accuracy of the detection. At this time, The flange is inspected, and at the same time, the centering slide rod 33 squeezes the reset spring 331, and the reset spring 331 contracts and accumulates force. After the inspection is completed, the centering electric push rod 343 is shortened, and the centering cone column 321 moves upward along the axis of the support sleeve 11. The reset spring 331 gradually resets and pushes the centering slide rod 33 to slide along the mounting through hole 112 toward the axis of the support sleeve 11, and the centering support rod 334 drives the centering ball sleeve 333 to move synchronously. Multiple groups of centering ball sleeves 333 are separated from the inner wall of the flange synchronously to achieve the relaxation of the flange. At this time, the inspected flange can be transferred out of the device of the present invention.

[0033] Combined with Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 With attached Fig.10 As shown, a support turntable 21 is rotatably provided on the detection base 1, a support slide groove 211 is provided on the support turntable 21, a support slider 212 is slidably provided in the support slide groove 211, the support slider 212 is slidably and rotatably matched with the bearing plate 22, a follower slide plate 213 is slidably provided in the support turntable 21, a support connecting rod 216 rotatably connected to the support slider 212 is rotatably provided on one side of the follower slide plate 213, a positioning rod 214 is rotatably provided in the follower slide plate 213, and the positioning rod 214 is driven by the centering mechanism 3 to move along the axis of the support turntable 21; A driving gear ring 217 is provided on the outer side of the supporting turntable 21, and the driving mechanism 4 includes a driving gear 41 rotatably set on the detection base 1, the driving gear 41 is meshed with the driving gear ring 217, and a driving worm wheel 411 is provided at the lower end of the driving gear 41. A driving worm 42 meshed with the driving worm wheel 411 is rotatably provided on the detection base 1, and a crank 421 is rotatably provided at one end of the driving worm 42.

[0034] The working principle of the detector 23 performing circular trajectory motion is as follows: the crank 421 is turned, the driving worm 42 drives the driving gear 41 to rotate through the driving worm wheel 411, and the driving gear 41 drives the supporting turntable 21 to perform circular rotation through the driving gear ring 217 meshing therewith. In this process, the centering mechanism 3 drives the positioning rod 214 to move along the axis of the supporting turntable 21 according to the inner diameter of the flange, and the positioning rod 214 drives the follower slide 213 to move synchronously. The follower slide 213 drives the supporting slide 212 to slide along the supporting slide groove 211 through the supporting connecting rod 216. Since the supporting sleeve 253 is pressed against the fixed rod 2 21 is limited in sliding and the longitudinal slide bar 113 is limited in sliding of the longitudinal sleeve 25. Therefore, the support slider 212 drives the bearing plate 22 that cooperates with its sliding and rotating movement to perform a circular trajectory. The fixed rod 221 drives the detector 23 to perform a synchronous circular motion through the extension rod 222 to perform a comprehensive detection of the flange. Furthermore, 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 motion trajectory according to the inner diameter of the flange, which is convenient for detecting flanges with different inner diameters and improves the applicability of the device of the present invention.

[0035] Combined with Figure 4 , Attachment Figure 5 , Attachment Figure 8 With attached Fig. 9 As shown, a centering spring 322 is provided on the centering cone column 321, and an adjusting stud 311 is threadedly connected to the mounting plate 31, an adjusting groove is provided on the upper end of the adjusting stud 311, and the lower end of the adjusting stud 311 is movably abutted against the centering cone column 321, a matching ball head column 34 is provided in the centering cone column 321, and a matching sliding column 342 is slidably provided at the lower end of the matching ball head column 34, and a centering connecting plate 344 connected to the telescopic end of the centering electric push rod 343 is provided at one end of the matching sliding column 342 extending from the matching ball head column 34, a reversing rod 341 is provided on the outer wall of the matching ball head column 34, and an adjusting rod 215 is provided on the outer wall of the positioning rod 214, and a connecting plate 24 is rotatably provided at the lower end of the detection base 1, and the two ends of the connecting plate 24 are respectively slidably matched with the reversing rod 341 and the adjusting rod 215.

[0036] The working principle of the reversing rod 341 driving the adjusting rod 215 to move is as follows: in the initial state, the centering spring 322 drives the centering cone column 321 to maintain the tendency of moving downward along the axis direction of the centering cone sleeve 32 through deformation, and the centering cone column 321 cooperates with the centering slide rod 33, the centering support rod 334 and the centering ball sleeve 333 to initially position the flange. In this process, the centering cone column 321 drives the matching ball head column 34 to move downward synchronously. Since the centering electric push rod 343 is not started, the centering connecting plate 34 4 is stationary, the mating ball stud 34 and the mating sliding post 342 slide relative to each other, the mating ball stud 34 drives the reversing rod 341 to move downward, the reversing rod 341 drives the positioning rod 214 to move upward through the cooperation between the connecting plate 24 and the adjusting rod 215, the follow-up slide plate 213 moves upward while driving the supporting connecting rod 216 to rotate, the supporting connecting rod 216 drives the supporting slider 212 to move away from the axis of the supporting rotating disk 21, thereby realizing the preliminary position adjustment of the supporting slider 212; Furthermore, when the centering electric push rod 343 is extended, 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 matching sliding column 342 to move downward to the extreme position of the matching ball head column 34, the centering electric push rod 343 continues to extend, and the centering connecting plate 344 can drive the matching ball head column 34 to move through the matching sliding column 342, thereby accurately centering the flange and accurately adjusting the position of the support slider 212.

[0037] Combined with Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 , Attachment Fig.11 With attached Fig.12 As shown, the extension rod 222 is provided with an extension sleeve 2221 at one end close to the fixed rod 221, an extension column 2222 is slidably provided in the extension sleeve 2221, an extension spring 2223 connected to the extension column 2222 is provided in the extension sleeve 2221, and 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.

[0038] The working principle of the extension column 2222 rotation: When the device of the present invention is in the vicinity Fig.12 In the detection state, the end faces of the extension rod 222 and the fixed rod 221 are against each other, and the axes of the extension rod 222 and the fixed rod 221 are in a colinear line, so that the extension rod 222 and the fixed rod 221 can slide relative to the supporting 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 adjacent Fig.11During 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 limiting 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.

[0039] Combined with Figure 2 , Attachment Figure 3 , Attachment Figure 4 With attached Figure 5 As shown, a supporting sleeve 251 is symmetrically provided at the upper end of the longitudinal sleeve 25, and a supporting screw sleeve 252 connected to the supporting sleeve 253 is slidably provided in the two groups of the supporting sleeves 251. A connecting screw 254 that is threadably matched with the supporting screw sleeve 252 is rotatably provided in the longitudinal sleeve 25, a connecting gear 255 is provided at the lower end of the connecting screw 254, and an adjusting gear 256 that meshes with the connecting gear 255 is rotatably provided in the longitudinal sleeve 25.

[0040] The working principle of the height adjustment of the supporting sleeve 253 is as follows: the adjusting gear 256 rotates, and the adjusting gear 256 drives the corresponding connecting screw 254 to rotate through the connecting gear 255 meshing therewith, and the connecting screw 254 drives the corresponding supporting screw sleeve 252 to slide along the supporting sleeve 251 through the thread, and the two groups of supporting screw sleeves 252 have the same moving direction. When the supporting screw sleeve 252 moves, it drives the supporting sleeve 253 connected thereto to move synchronously, and the supporting sleeve 253 drives the height of the fixed rod 221 and the extension rod 222 to be adjusted, thereby adjusting the height of the detector 23, so that the device of the present invention can be suitable for flange detection operations of different heights.

[0041] Combined with Figure 1 , Attachment Figure 4 , Attachment Figure 8 With attached Fig. 9 As shown, a large flange forging defect detection method, using the large flange forging defect detection device, the steps are as follows: Step 1: Rotate the extension rod 222 until the extension column 2222 is inserted into the limiting through hole 2211, the extension rod 222 is in a vertical state, the flange is placed on the detection base 1, and the support sleeve 11 is in the hollow position of the flange; Step 2: Rotate the extension rod 222 to make the extension rod 222 abut against the fixed rod 221, and 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 the multiple groups of centering ball heads abut against the inner side of the flange, and the flange is fixed while making the flange axis and the support pipe sleeve 11 axis collinear, and the flange is fixed from the inside of the flange; Step 3: According to the inner diameter 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 support turntable 21 to rotate through the driving mechanism 4, and the support turntable 21 drives the support slider 212 to rotate in a circle matching the inner diameter of the flange. The detector 23 performs a comprehensive inspection of the flange during the movement; Step 5: Rotate the extension rod 222 until the extension column 2222 is inserted into the limiting through hole 2211 , and the extension rod 222 is in a vertical state, and move the tested flange out of the testing base 1 .

[0042] In the specific implementation of the present invention, firstly, a detector 23 of suitable frequency and type is selected according to the needs. For thicker flanges, a detector 23 of lower frequency can be selected to ensure that the ultrasonic wave can effectively penetrate the material. At the same time, a coupling agent can be applied to the flange to reduce the reflection loss of the ultrasonic wave between the detector 23 and the flange surface. Afterwards, the extension rod 222 is rotated clockwise to insert the extension column 2222 into the limiting through hole 2211, and the extension rod 222 and the fixing rod 221 are kept perpendicular to each other. At this time, the upper space of the support sleeve 11 is in an unobstructed state, and the centering electric push rod 343 is operated to shorten, and the centering slide rod 33 drives the centering ball sleeve 333 to move and retract into the installation through hole 112, and the flange to be tested is placed on the support sleeve 11, and the lower end surface of the flange contacts the anti-wear pad 111 to prevent the flange from being worn during the detection process; After that, the centering electric push rod 343 is extended, and the centering connecting plate 344 drives the matching ball head column 34 to move through the matching sliding column 342, so as to accurately center the flange. At the same time, the reversing rod 341 drives the positioning rod 214 to move upward through the matching of the connecting plate 24 and the adjusting rod 215. When the follow-up slide plate 213 moves upward, it drives the supporting slide block 212 to move away from the axis of the supporting turntable 21 through the supporting connecting rod 216, so as to complete the adjustment of the position of the supporting slide block 212. Next, the extension rod 222 is rotated to make the extension rod 222 abut against the end surface of the fixed rod 221. At this time, the axis of the extension rod 222 is in line with the axis of the fixed rod 221. The crank 421 is rotated, and the driving worm 42 drives the supporting turntable 21 to rotate in a circle through the driving worm wheel 411, the driving gear 41 and the driving gear ring 217. The supporting slider 212 drives the bearing plate 22 to move in a circular trajectory. The fixed rod 221 drives the detector 23 to synchronously move in a circular motion through the extension rod 222, thereby performing a comprehensive inspection of the flange. After the detection is completed, the extension rod 222 is rotated clockwise to insert the extension column 2222 into the limiting through hole 2211, and the extension rod 222 and the fixing rod 221 are kept perpendicular to each other, and the flange after the detection is transferred out of the device of the present invention.

[0043] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and do not deviate from the purpose of the invention, they can creatively design a structure and embodiment similar to the technical solution, which should fall within the protection scope of the present invention.

Claims

1. A large flange forging defect detection device, comprising a detection base (1), wherein a detection mechanism (2) is provided on the detection base (1), characterized in that: The detection base (1) is provided with a longitudinal slide bar (113), and the longitudinal slide bar (113) is provided in two groups. The detection mechanism (2) comprises a longitudinal slide sleeve (25) slidably arranged on the longitudinal slide bar (113), and a supporting slide sleeve (253) is provided on the longitudinal slide sleeve (25). The height of the supporting slide sleeve (253) can be adjusted according to the height of the flange. A fixed rod (221) is slidably arranged on the supporting slide sleeve (253), and an extension rod (222) is rotatably provided at one end of the fixed rod (221). A detector (23) for detecting flange defects is provided at one end of the extension rod (222), and a bearing plate (22) is provided at the other end of the fixed rod (221). The bearing plate (22) can move in a circular trajectory according to the inner diameter of the flange. The detection base (1) is provided with a support sleeve (11), and a centering mechanism (3) for centering the flange is provided inside the support 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. The detection base (1) is provided with a driving mechanism (4) for driving the bearing plate (22) to rotate.

2. A large flange forging defect detection device according to claim 1, characterized in that: A support turntable (21) is rotatably provided on the detection base (1), a support slide groove (211) is provided on the support turntable (21), a support slider (212) is slidably provided in the support slide groove (211), the support slider (212) and the bearing plate (22) are slidably and rotatably cooperated, a follower slide plate (213) is slidably provided in the support turntable (21), a support connecting rod (216) rotatably connected to the support slider (212) is rotatably provided on one side of the follower slide plate (213), a positioning rod (214) is rotatably provided in the follower slide plate (213), and the positioning rod (214) is driven by the centering mechanism (3) to move along the axis of the support turntable (21).

3. A large flange forging defect detection device according to claim 2, characterized in that: The centering mechanism (3) comprises a centering cone sleeve (32) and a mounting plate (31) which are sequentially arranged on the support sleeve (11); 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 groups of mounting through holes (112) are equidistantly arranged on the support sleeve (11) along the circumferential direction; the mounting through holes (112) and the centering cone sleeve (32) are matched. A centering slide bar (33) is slidably provided in the installation through hole (112), one end of the centering slide bar (33) is slidably matched with the centering cone column (321), the other end of the centering slide bar (33) is provided with a centering support rod (334), and the centering support rod (334) is sleeved with a centering ball sleeve (333), and the lower end of the detection base (1) is provided with a centering electric push rod (343) for driving the centering cone column (321) to move along the axial direction of the support pipe sleeve (11).

4. A large flange forging defect detection device according to claim 3, characterized in that: A centering spring (322) is provided on the centering cone column (321), and an adjusting stud (311) is threadedly connected to the mounting plate (31), and the lower end of the adjusting stud (311) is movably abutted against the centering cone column (321).

5. A large flange forging defect detection device according to claim 3, characterized in that: The mounting through holes (112) are all connected to reset studs (332) via threads, the centering slide bar (33) is provided with a reset spring (331) movably abutting against the reset studs (332), and the centering support rod (334) passes through the reset studs (332).

6. A large flange forging defect detection device according to claim 3, characterized in that: A matching ball head column (34) is provided inside the centering cone column (321), a matching sliding column (342) is slidably provided at the lower end of the matching ball head column (34), and a centering connecting plate (344) connected to the telescopic end of the centering electric push rod (343) is provided at one end of the matching sliding column (342) extending out of the matching 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), and a connecting plate (24) is rotatably provided on the lower end of the detection base (1), and two ends of the connecting plate (24) are respectively slidably mated with the reversing rod (341) and the adjusting rod (215).

7. A large flange forging defect detection device according to claim 1, characterized in that: 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 in the extension sleeve (2221), an extension spring (2223) connected to the extension column (2222) is provided in the extension sleeve (2221), and a limiting through hole (2211) cooperating with the extension column (2222) is provided on the fixed rod (221).

8. A large flange forging defect detection device according to claim 1, characterized in that: A supporting sleeve (251) is symmetrically provided at the upper end of the longitudinal sleeve (25), and a supporting screw sleeve (252) connected to the supporting sleeve (253) is slidably provided in both groups of the supporting sleeves (251). A connecting screw (254) threadably engaged with the supporting screw sleeve (252) is rotatably provided in the longitudinal sleeve (25), a connecting gear (255) is provided at the lower end of the connecting screw (254), and an adjusting gear (256) meshing with the connecting gear (255) is rotatably provided in the longitudinal sleeve (25).

9. A large flange forging defect detection method, using the large flange forging defect detection device according to any one of claims 1 to 8, characterized in that: The steps are as follows: Step 1: Rotate the extension rod (222) to a vertical position and place the flange on the detection base (1); Step 2: Rotate the extension rod (222) to a horizontal state, start the centering mechanism (3) to adjust the flange axis and the support sleeve (11) axis to be in line with each other, and fix the flange from the inside of the flange; 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; Step 4: starting the detector (23), and driving the detector (23) to rotate in a circle matching the inner diameter of the flange through the driving mechanism (4), and the detector (23) performs a comprehensive inspection of the flange during the movement; Step 5: Rotate the extension rod (222) to a vertical position and move the tested flange out of the testing base (1).

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