Pipe flaw detection device

Abstract

The invention relates to the technical field of pipe flaw detection devices, and discloses a pipe flaw detection device which comprises a motor, the output end of the motor is fixedly connected with a threaded rod, the surface of the threaded rod is in threaded connection with a threaded plate, the end of the threaded plate is fixedly connected with an outer surface detection device, and the bottom of a U-shaped supporting plate is fixedly connected with a lower pull rod. The detection mechanism is arranged, the inner wall detection device is started at the same time to drive the threaded rod to rotate reversely, so that the threaded plate and the outer surface detection device are reset, and the other half of the pipe is detected in the reset process of the outer surface detection device and the inner wall detection device; the surface and the interior of a pipe can be effectively detected at the same time through the outer surface detection device and the inner wall detection device, after detection is completed, the power device can be started to enable the pipe to rotate by 180 degrees, and the other half of the pipe can be detected in the reset process of the outer surface detection device and the inner wall detection device; therefore, manual detection is replaced, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe flaw detection equipment, in particular to a pipe flaw detection device. BACKGROUND

[0002] With the improvement of the production quality and processing technology of welded pipes, the pipes are widely used in water supply, heating and gas supply. In the use of water supply, heating and gas supply, the pipes need to bear certain pressure. Therefore, when the pipes have defects in production, improper use or natural erosion, and have phenomena such as sand eye, crack or unfirm welding on the pipe wall, leakage is easily caused, which results in resource waste and even causes accidents with strong destructive power. Therefore, in the production process of the pipes and before use, the pipes often need to be detected.

[0003] In the prior art, when the pipes are detected, the workers usually hold the flaw detection device to detect the pipes. However, the workers are slow in the detection process, which affects the efficiency of the pipe detection. When the long pipes are detected, the pipes are easily shaken, which affects the quality of the pipe detection. SUMMARY

[0004] The purpose of the present application is to provide a pipe flaw detection device to solve the problems in the background.

[0005] To solve the above technical problems, the present application is realized by the following technical scheme: The utility model provides a kind of pipe flaw detection device, including workbench, both sides of workbench are fixedly connected with support frame, the top of support frame is connected with motor;The surface of workbench is recessed, the inner wall of recess is slidably connected with sliding block, the top of sliding block is rotatably connected with push plate, the end of push plate away from sliding block is rotatably connected with the placing ring for carrying pipe, the bottom of placing ring is connected with support telescopic link, the end of support telescopic link away from placing ring is connected with the inner wall of recess.Pipe flaw detection device further include limiting mechanism for preventing pipe from shaking when flaw detection, rotating mechanism for driving pipe to rotate to realize whole detection, and detection mechanism for synchronous detection pipe outer surface and inner surface;Limiting mechanism includes force telescopic plate, one end of force telescopic plate is connected with limiting ring, the inner wall of limiting ring is rotatably connected with contact wheel for being attached with pipe outer surface;Rotating mechanism includes concave plate and power device, the inner wall of concave plate is slidably connected with clamping ring for clamping pipe end, the surface of clamping ring is hinged with driven rod, power device is used to drive concave plate and clamping ring rotate around pipe axis;Detection mechanism includes U-shaped support plate and motor, the inner wall of U-shaped support plate is connected with electric telescopic link, the output end of electric telescopic link is connected with inner wall detection device for extending into pipe interior;The surface of motor is fixedly connected to the surface of support frame, the output end of motor is connected with threaded rod, the surface of threaded rod is screw-connected with threaded plate, the end of threaded plate is fixedly connected with outer surface detection device for being attached with pipe outer surface;The surface of support frame is provided with sliding slot, both ends of U-shaped support plate are slidably connected to the inner wall of sliding slot.

[0006] Limiting mechanism further includes sliding slot plate, the top of sliding slot plate is fixedly connected to the top of support frame inner wall, the inner wall of sliding slot plate is slidably connected with slide plate;The top of slide plate is fixedly connected with rack, the output end of motor is fixedly connected with gear disc engaged with rack, gear disc rotates and drives rack and slide plate to move along the length direction of sliding slot plate.

[0007] The bottom of slide plate is connected with bent plate, the end of bent plate away from slide plate is fixedly connected with recess plate, the inner wall of recess plate is slidably connected with elastic plate, the end of elastic plate away from recess plate is in contact with the outer surface of limiting ring;The end of force telescopic plate away from limiting ring is fixedly connected with both ends of recess plate.

[0008] The surface of bent plate is connected with T-shaped contact frame;The surface of sliding block is rotatably connected with expansion rod, the end of expansion rod away from sliding block is rotatably connected with push rod, the end of push rod away from expansion rod is connected with elastic frame, T-shaped contact frame is in contact with the surface of elastic frame and extrudes elastic frame when moving.

[0009] Rotating mechanism further includes right-angle telescopic plate, one end of right-angle telescopic plate is fixedly connected to the end of workbench, both sides of right-angle telescopic plate are hinged with push plate, the end of push plate away from right-angle telescopic plate is hinged with right-angle rod, the end of right-angle rod away from push plate is fixedly connected to the surface of force telescopic plate.

[0010] The end of the right-angle telescopic plate away from the workbench is connected with the driven ring, the surface of the power device is fixedly connected to the outer surface of the driven ring, the output end of the power device is connected with the rotating disc, and the side of the rotating disc away from the power device is fixedly connected to the outer surface of the concave plate.

[0011] The surface of the support frame is connected with the long rod, the end of the long rod away from the support frame is connected with the groove ring, the inner wall of the groove ring is slidingly connected with the sliding ring, and the end of the driven rod away from the clamping ring is hingedly connected to the outer surface of the sliding ring.

[0012] The detection mechanism further comprises a lower pull rod, one end of the lower pull rod is fixedly connected to the bottom of the U-shaped support plate, and the end of the lower pull rod away from the U-shaped support plate is fixedly connected to the two sides of the placement ring; when the placement ring moves up and down, the U-shaped support plate is driven to slide along the sliding groove through the lower pull rod.

[0013] The inner wall of the placement ring is in contact with the outer surface of the pipe, the axis of the inner wall detection device is collinear with the axis of the pipe, and the detection end of the inner wall detection device when extending into the pipe is opposite to the inner surface of the pipe.

[0014] The axis of the driven ring is collinear with the axis of the pipe, and the axis of the rotating disc is collinear with the axis of the driven ring; the detection end of the outer surface detection device faces the outer surface of the pipe, and the detection end of the outer surface detection device when moving is attached to the outer surface of the pipe.

[0015] The present application has the following beneficial effects: The application is characterized in that the pipe to be detected is placed on the surface of the placing ring, and then the motor is started to drive the gear disc to rotate, which drives the rack to move towards each other, and the sliding plate slides towards each other in the inner wall of the sliding groove plate, which drives the bending plate to move towards each other, and the recessed plate, the elastic plate and the stress expansion plate are pushed to move towards each other, the limiting ring is pushed to move towards each other, the contact wheel is driven to move towards each other, so that the contact wheel contacts the pipe, and the T-shaped contact frame is driven to move towards each other while the bending plate moves, and the T-shaped contact frame contacts the surface of the elastic frame, and the contact wheel contacts the pipe, and the bending plate is pushed to move towards each other, and the recessed plate and the stress expansion plate are pushed to move towards each other, the limiting ring is limited and kept stationary, the stress expansion plate is contracted towards each other by the pushing force of the bending plate, the surface of the elastic plate contacts the limiting ring, the elastic plate is kept stationary with the limiting ring, the recessed plate is extruded to slide towards each other in the inner wall of the recessed plate, the T-shaped contact frame is driven to move towards each other with the bending plate and extrude the elastic frame, the elastic frame is extruded to bend towards each other in the middle part, the pushing rod is pushed to move towards each other, the expansion rod is expanded to move towards each other, the sliding block is pushed to slide towards each other in the inner wall of the recess, the end of the lower pushing plate is pushed to move towards each other, the other end of the lower pushing plate pulls the placing ring to move downwards, the placing ring is separated from the pipe, the supporting expansion rod is contracted downwards, the pipe is limited by the limiting ring and the contact wheel, the shaking phenomenon during detection is prevented, the detection quality is improved, the contact wheel contacts the pipe, the pipe rotation is not affected during positioning, the placing ring is separated from the pipe after positioning, the friction force between the pipe and the placing ring is prevented during pipe rotation, and the rotation difficulty phenomenon is prevented.

[0016] The present application is characterized in that the rotating mechanism is arranged, when the force extension plate moves towards each other, the right angle rod moves towards each other, the end of the push plate moves towards each other, the other end of the push plate pushes the right angle extension plate towards the workbench, the right angle extension plate moves towards the workbench, the driven ring moves towards the workbench, the power device and the rotating disc move towards the workbench, the concave plate and the clamping ring move towards the workbench, the end of the driven rod moves towards the workbench, the angle of the driven rod changes, the clamping ring slides towards each other, the clamping ring contacts the pipe and clamps the pipe, the pipe is fixed, the rotating disc rotates in the inner wall of the driven ring, the concave plate and the clamping ring rotate, the pipe rotates, the clamping ring rotates, the driven rod rotates, the sliding ring rotates in the inner wall of the groove ring, the pipe is clamped by the clamping ring, the pipe is more stable, the pipe is rotated by the power device.

[0017] The application sets the detection mechanism, when the placing ring moves downward, the lower pull rod is pulled to move downward, when the lower pull rod moves, the U-shaped support plate is pulled to slide downward in the inner wall of the sliding groove, when the U-shaped support plate slides, the electric telescopic rod is pulled to move downward, when the electric telescopic rod moves, the inner wall detection device is pulled to move downward, so that the inner wall detection device is at the same level with the pipe, at this time, the electric telescopic rod is started to push the inner wall detection device to move towards the pipe, so that the inner wall detection device enters the inside of the pipe to detect, at the same time, the motor is started to drive the threaded rod to rotate, when the threaded rod rotates, the threaded plate is moved towards the pipe, when the threaded plate moves, the outer surface detection device is moved towards the pipe, so that the outer surface detection device detects the surface of the pipe, so that the inner wall detection device and the outer surface detection device can detect the surface and the inside of the pipe at the same time, when the outer surface detection device and the inner wall detection device move to the other end of the pipe, the power device is started to drive the pipe to rotate one hundred and eighty degrees, then the electric telescopic rod is started to pull the inner wall detection device to reset, at the same time, the motor is started to drive the threaded rod to reverse, so that the threaded plate and the outer surface detection device reset, in the resetting process of the outer surface detection device and the inner wall detection device, the other half of the pipe is detected, effectively, the outer surface detection device and the inner wall detection device can detect the surface and the inside of the pipe at the same time, after the detection is completed, the power device is started to make the pipe rotate one hundred and eighty degrees, in the resetting process of the outer surface detection device and the inner wall detection device, the other half of the pipe is detected, so that the artificial detection is replaced, and the detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the overall sectional structure of the present application; Figure 3 It is a schematic diagram of the overall structure of the present application; Figure 4 It is a schematic diagram of the limiting ring structure of the present application; Figure 5 It is a schematic diagram of the A part of the present application; Figure 4 Figure 6 It is a schematic diagram of the rotating mechanism structure of the present application; Figure 7 It is a schematic diagram of the right-angle rod structure of the present application;​ Figure 8 It is the schematic diagram of the slip ring structure of the application; Figure 9 It is the schematic diagram of the overall structure of the detection mechanism of the application; Figure 10 It is the schematic diagram of the inner wall detection device structure of the application.

[0020] In the drawings, the components represented by each reference numeral are listed as follows: In the drawings: 1, workbench; 2, support frame; 3, motor; 4, sliding block; 5, push-down plate; 6, placing ring; 7, support telescopic rod; 8, expansion rod; 9, push rod; 10, elastic frame; 11, pipe; 101, limiting mechanism; 102, sliding groove plate; 12, sliding plate; 13, rack; 14, bent plate; 15, groove plate; 16, elastic plate; 17, force telescopic plate; 18, limiting ring; 19, contact wheel; 20, T-shaped contact frame; 21, toothed disc; 30, rotating mechanism; 31, right-angle telescopic plate; 32, push plate; 33, right-angle rod; 34, driven ring; 35, power device; 36, rotating disc; 37, concave plate; 38, clamping ring; 39, driven rod; 40, long rod; 41, groove ring; 42, slip ring; 50, detection mechanism; 51, motor; 52, threaded rod; 53, threaded plate; 54, outer surface detection device; 55, U-shaped support plate; 56, electric telescopic rod; 57, inner wall detection device; 58, pull-down rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0022] Please refer to Figures 1-10 As shown in the drawings, the application is a pipe flaw detection device, which comprises a workbench 1, support frames 2 fixedly connected to the two sides of the workbench 1, a motor 3 fixedly connected to the top of the support frame 2, a groove formed in the surface of the workbench 1, a sliding block 4 slidably connected to the inner wall of the groove, a push-down plate 5 rotatably connected to the top of the sliding block 4, a placing ring 6 for bearing the pipe rotatably connected to the end of the push-down plate 5 away from the sliding block 4, a support telescopic rod 7 fixedly connected to the bottom of the placing ring 6, and the end of the support telescopic rod 7 away from the placing ring 6 connected to the inner wall of the groove.

[0023] The pipe flaw detection device further comprises a limiting mechanism 101 for preventing the pipe from shaking during flaw detection, a rotating mechanism 30 for driving the pipe to rotate to realize full-circle detection, and a detection mechanism 50 for synchronously detecting the outer surface and the inner surface of the pipe.

[0024] In some embodiments, the limiting mechanism 101 comprises a force-bearing telescopic plate 17, one end of which is connected with a limiting ring 18, and the inner wall of the limiting ring 18 is rotationally connected with a contact wheel 19 used for abutting the outer surface of the pipe.

[0025] In some embodiments, the rotating mechanism 30 comprises a concave plate 37 and a power device 35, the inner wall of the concave plate 37 is slidingly connected with a clamping ring 38 used for clamping the end of the pipe, the surface of the clamping ring 38 is hingedly connected with a driven rod 39, and the power device 35 is used for driving the concave plate 37 and the clamping ring 38 to rotate around the axis of the pipe.

[0026] In some embodiments, the detecting mechanism 50 comprises a U-shaped support plate 55 and a motor 51, the inner wall of the U-shaped support plate 55 is fixedly connected with an electric telescopic rod 56, the output end of the electric telescopic rod 56 is connected with an inner wall detecting device 57 used for extending into the interior of the pipe, the surface of the motor 51 is fixedly connected with the surface of the support frame 2, the output end of the motor 51 is connected with a threaded rod 52, the surface of the threaded rod 52 is threadedly connected with a threaded plate 53, the end of the threaded plate 53 is fixedly connected with an outer surface detecting device 54 used for abutting the outer surface of the pipe, and the surface of the support frame 2 is provided with a sliding groove, and the two ends of the U-shaped support plate 55 are slidingly connected with the inner wall of the sliding groove.

[0027] The pipe to be detected is placed on the placing ring 6, one end of the supporting telescopic rod 7 is fixedly connected with the bottom of the placing ring 6, and the other end is connected with the inner wall of the groove of the workbench 1, the supporting telescopic rod 7 supports the placing ring 6 to keep the initial height stable, and ensures that the pipe can be stably carried. The force-bearing telescopic plate 17 drives the limiting ring 18 connected with one end thereof to move towards the pipe until the contact wheel 19 rotationally connected with the inner wall of the limiting ring 18 abuts the outer surface of the pipe tightly. At this time, the contact wheel 19 abuts the pipe to realize the radial limitation of the pipe, preventing the pipe from deviating during the detection. At the same time, since the contact wheel 19 is rotationally connected, it can rotate synchronously with the pipe during the subsequent rotation of the pipe, avoiding hindering the rotation of the pipe.

[0028] The support frame 2 is provided with a sliding groove on the surface, and the two ends of the U-shaped support plate 55 are slidingly connected to the inner wall of the sliding groove. By adjusting the sliding position of the U-shaped support plate 55 in the sliding groove, the electric telescopic rod 56 fixedly connected to the inner wall of the U-shaped support plate 55 and the motor 51 fixed on the surface of the support frame 2 are respectively matched with the detection height of the pipe. When the inner wall detection device 57 is started, the output end of the electric telescopic rod 56 pushes the inner wall detection device 57 connected thereto to extend into the pipe along the axial direction, so that the inner wall detection device 57 reaches the position to be detected in the pipe, and is ready to detect the inner surface of the pipe. When the outer surface detection device 54 is started, the output end of the motor 51 drives the threaded rod 52 connected thereto to rotate. Since the threaded plate 53 is threadedly connected with the threaded rod 52, when the threaded rod 52 rotates, the threaded plate 53 is driven to move along the axial direction of the threaded rod 52 towards the pipe, until the outer surface detection device 54 fixedly connected to the end of the threaded plate 53 is attached to the outer surface of the pipe, and synchronous detection of the outer surface of the pipe is realized.

[0029] The rotation mechanism 30 is synchronously started to realize no dead angle detection in the circumferential direction of the pipe. The clamping ring 38 is slidingly connected with the inner wall of the concave plate 37. First, the clamping ring 38 is moved to the end of the pipe and clamps the end of the pipe. Then, the power device 35 is started, and the power device 35 drives the structure (indirectly drives the concave plate 37) connected to the output end to rotate. Since the clamping ring 38 clamps the end of the pipe, when the concave plate 37 rotates, it synchronously drives the clamping ring 38 and the pipe to rotate around the axis of the pipe. At the same time, the end of the driven rod 39 is hinged with the clamping ring 38, which can assist in maintaining the stability of the clamping ring 38 during the rotation of the pipe, so as to avoid the deviation of the clamping ring 38. During the rotation of the pipe, the inner wall detection device 57 (located inside the pipe) and the outer surface detection device 54 (attached to the outside of the pipe) work continuously to realize complete detection of the inner and outer surfaces of the pipe.

[0030] The limiting ring 18 of the limiting mechanism 101 cooperates with the contact wheel 19: the contact wheel 19 is attached to the outer surface of the pipe to form radial limiting, which directly prevents the pipe from shaking during detection. The "rotary connection" design of the contact wheel 19 not only does not hinder the subsequent rotation of the pipe, but also can continuously maintain the limiting effect, which significantly improves the accuracy of the detection data. The inner wall detection device 57 and the outer surface detection device 54 work simultaneously without the need for step-by-step detection of the inner and outer surfaces, which greatly shortens the detection time. The power device 35 of the rotation mechanism 30 drives the pipe to rotate around its axis, and cooperates with the fixed inner wall detection device 57 and the outer surface detection device 54 to cover all areas of the pipe in one time, avoiding the omission or repeated detection of the pipe when it is manually turned over, and realizing the full-circle no-dead-angle detection.

[0031] In some embodiments, the limiting mechanism 101 further comprises a sliding groove plate 102, the top of the sliding groove plate 102 is fixedly connected to the top of the inner wall of the support frame 2, and the inner wall of the sliding groove plate 102 is slidingly connected with the sliding plate 12. The top of the sliding plate 12 is fixedly connected with the rack 13, the output end of the motor 3 is fixedly connected with a gear disc 21 meshing with the rack 13, and the gear disc 21 drives the rack 13 and the sliding plate 12 to move along the length direction of the sliding groove plate 102 when rotating.

[0032] The bottom of the sliding plate 12 is connected with the bent plate 14, the end of the bent plate 14 away from the sliding plate 12 is fixedly connected with the groove plate 15, the inner wall of the groove plate 15 is slidingly connected with the elastic plate 16, and the end of the elastic plate 16 away from the groove plate 15 is in contact with the outer surface of the limiting ring 18. The end of the stress expansion plate 17 away from the limiting ring 18 is fixedly connected with the two ends of the groove plate 15.

[0033] The top of the sliding groove plate 102 is a fixed end, which is directly fixedly connected to the top of the inner wall of the support frame 2, forming a stable top suspension type mounting structure. The inner wall of the sliding groove plate 102 is an active guide surface, which is slidingly connected with the sliding plate 12, limiting the sliding plate 12 to move only along the length direction of the sliding groove plate 102, i.e. the horizontal direction towards or away from the pipe. The sliding plate 12 is an intermediate power transmission component, and the top of the sliding plate 12 is fixedly connected with the rack 13, so that the sliding plate 12 and the rack 13 have no relative displacement and receive linear power from the rack 13. The linear power is transmitted to the subsequent execution component. The whole realizes stable linear movement through the guidance of the sliding groove plate 102. The rack 13 and the gear disc 21 are power conversion components, the gear disc 21 is fixedly connected to the output end of the motor 3, the motor 3 drives the gear disc 21 to rotate coaxially when starting, and the gear disc 21 is meshingly connected with the rack 13, which can convert the rotary motion of the motor 3 into the linear motion of the rack 13, and further drive the sliding plate 12 to move synchronously.

[0034] The bent plate 14 is fixedly connected with the bottom of the sliding plate 12 at one end and the groove plate 15 at the other end, which plays a role of steering transmission and transmits the horizontal power of the sliding plate 12 to the groove plate 15, driving the groove plate 15 to move synchronously towards the pipe. The groove plate 15 is a U-shaped groove structure, the inner wall of which is slidingly connected with the elastic plate 16, and the elastic plate 16 can slide along the groove depth direction of the groove plate 15. Meanwhile, the two ends of the groove plate 15 are fixedly connected with one end of the stress expansion plate 17, and the other end of the stress expansion plate 17 is fixedly connected with the limiting ring 18, forming a power transmission chain of the groove plate 15, the stress expansion plate 17 and the limiting ring 18. One end of the elastic plate 16 is embedded in the inner wall of the groove plate 15, and the other end is in flexible contact with the outer surface of the limiting ring 18. When the limiting ring 18 is blocked by the pipe, the elastic plate 16 can buffer the power through its own deformation.

[0035] When the pipe is placed in the placing ring 6, the motor 3 at the top of the support frame 2 is started: the output end of the motor 3 drives the gear disc 21 to rotate around its own axis. Because the gear disc 21 is meshed with the rack 13, the rotary motion is converted into the linear motion of the rack 13. The rack 13 drives the sliding plate 12 fixed thereto to slide smoothly along the inner wall of the sliding groove plate 102 towards the pipe. When the sliding plate 12 slides, the bent plate 14 at the bottom thereof moves synchronously, thereby driving the groove plate 15 fixed to the bent plate 14 to move towards the pipe. The force-stretching plates 17 at both ends of the groove plate 15 are stretched out synchronously with the groove plate 15, pushing the limiting ring 18 fixed thereto to move towards the pipe, and finally making the contact wheel 19 on the inner wall of the limiting ring 18 gradually close to the outer surface of the pipe. When the contact wheel 19 contacts the outer surface of the pipe, the limiting ring 18 cannot continue to move due to the obstruction of the pipe. However, at this time, the motor 3 still drives the sliding plate 12, the bent plate 14, and the groove plate 15 to move towards the pipe. When the groove plate 15 moves, the inner wall thereof exerts a pressing force on the elastic plate 16, and the elastic plate 16 slides along the inner wall of the groove plate 15 towards the limiting ring 18 and elastically deforms, while the force-stretching plate 17 is moderately contracted due to the pushing force. Under the combined action of the two, the contact wheel 19 is tightly attached to the outer surface of the pipe, and damage to the pipe or the contact wheel 19 caused by rigid pushing force is avoided, realizing self-adaptive attachment.

[0036] In some embodiments, the surface of the bent plate 14 is connected with the T-shaped contact frame 20. The surface of the sliding block 4 is rotationally connected with the expansion rod 8, the end of the expansion rod 8 away from the sliding block 4 is rotationally connected with the push rod 9, the end of the push rod 9 away from the expansion rod 8 is connected with the elastic frame 10, and the T-shaped contact frame 20 contacts the surface of the elastic frame 10 and presses the elastic frame 10 when the T-shaped contact frame 20 moves.

[0037] When the limiting mechanism 101 works, the bent plate 14 moves with the sliding plate 12 and drives the T-shaped contact frame 20 to synchronously move close to the elastic frame 10, the T-shaped contact frame 20 presses the elastic frame 10 to make it bend, the bent elastic frame 10 pushes the push rod 9 to move, thereby driving the expansion rod 8 to expand and pushing the sliding block 4 to slide in the groove of the workbench 1, the sliding block 4 slides and pulls the placing ring 6 to move downward through the lower push plate 5 (the support telescopic rod 7 synchronously contracts), so that the placing ring 6 is automatically separated from the pipe, greatly improving the operation efficiency. Since the placing ring 6 is separated from the pipe, when the pipe is rotated for full-circle detection by the subsequent rotating mechanism 30, the pipe will not rub against the placing ring 6, which not only ensures smooth and stable rotation of the pipe, but also avoids damage to the surface of the pipe or rotation deviation caused by friction, thereby ensuring the accuracy of the detection data. The elastic property of the elastic frame 10 can buffer the pressing force of the T-shaped contact frame 20, avoiding damage to the T-shaped contact frame 20, the push rod 9, or the expansion rod 8 due to excessive force caused by rigid contact, thereby prolonging the service life of the components.

[0038] In some embodiments, the rotating mechanism 30 further comprises a right-angled telescopic plate 31, one end of which is fixedly connected to the end of the workbench 1, both sides of the right-angled telescopic plate 31 are hingedly connected with a push plate 32, one end of the push plate 32 away from the right-angled telescopic plate 31 is hingedly connected with a right-angled rod 33, and one end of the right-angled rod 33 away from the push plate 32 is fixedly connected to the surface of the force-receiving telescopic plate 17.

[0039] Since the right-angled rod 33 is fixed to the surface of the force-receiving telescopic plate 17, when the force-receiving telescopic plate 17 moves towards the pipe, the right-angled rod 33 will be translated towards the pipe at the same time. When the right-angled rod 33 is translated, the hinged end of the right-angled rod 33 will move, thereby pushing the push plate 32 to rotate around the hinge point with the right-angled telescopic plate 31, so that the angle of the push plate 32 changes, gradually transitioning from an inclined state to a horizontal state. During the rotation of the push plate 32, a pushing force along the axis direction of the right-angled telescopic plate 31 will be generated, forcing the right-angled telescopic plate 31 to contract in the direction of the shortened length. When the right-angled telescopic plate 31 contracts, the movable end away from the end of the workbench 1 will move towards the pipe at the same time, thereby driving the subsequent components of the rotating mechanism 30 to move towards the pipe, until the clamping ring 38 of the rotating mechanism 30 reaches a position where it can clamp the end of the pipe, preparing for the subsequent pipe rotating action.

[0040] In some embodiments, one end of the right-angled telescopic plate 31 away from the workbench 1 is connected with a driven ring 34, the surface of a power device 35 is fixedly connected to the outer surface of the driven ring 34, the output end of the power device 35 is connected with a rotating disc 36, and one side of the rotating disc 36 away from the power device 35 is fixedly connected to the outer surface of a concave plate 37.

[0041] In some embodiments, the surface of the support frame 2 is connected with a long rod 40, one end of the long rod 40 away from the support frame 2 is connected with a groove ring 41, the inner wall of the groove ring 41 is slidingly connected with a sliding ring 42, and one end of the driven rod 39 away from the clamping ring 38 is hingedly connected to the outer surface of the sliding ring 42.

[0042] When the right-angle telescopic plate 31 is retracted or extended, it can drive the driven ring 34 to move closer to or away from the pipe. The driven ring 34 provides a stable mounting carrier for the power device 35, ensuring that the power device 35 does not deviate in position when moving with the driven ring 34. The output end of the power device 35 is fixedly connected with the rotating disc 36, and when the power device is started, it drives the rotating disc 36 to rotate coaxially. The side of the rotating disc 36 away from the power device 35 is fixedly connected with the outer surface of the concave plate 37, which can transmit the rotating power of the power device 35 to the concave plate 37 and drive the concave plate 37 to rotate synchronously. The groove ring 41 is an annular groove structure, and its position does not change with the movement of the rotating mechanism, providing a stable sliding track for the subsequent sliding ring 42. One end of the driven rod 39 is hinged to the outer surface of the sliding ring 42, and the other end is hinged to the clamping ring 38 which is slidingly connected with the inner wall of the concave plate 37, forming a stable support chain for the clamping ring 38. Through the limiting of the driven rod 39, the radial deviation of the clamping ring 38 during movement or rotation is avoided.

[0043] When the force-retracting plate 17 of the limiting mechanism 101 moves towards the pipe, it drives the right-angle rod 33 and the push plate 32 to retract the right-angle telescopic plate 31, and the right-angle telescopic plate 31 drives the driven ring 34, the power device 35 and the concave plate 37 to move closer to the pipe. When the concave plate 37 approaches the pipe, the clamping ring 38 connected with the inner wall of the concave plate 37 moves synchronously towards the end of the pipe. At this time, the driven rod 39, being hinged to the sliding ring 42 (position fixed), will limit the movement track of the clamping ring 38 through the hinged relationship, ensuring that the clamping ring 38 always aligns with the end of the pipe until the clamping ring 38 tightly contacts with the end of the pipe, completing the clamping and fixing of the pipe. At this time, the sliding ring 42 still remains in the initial position within the groove ring 41, and the driven rod 39 is in an inclined state.

[0044] Start the power device 35, and the power device 35 drives the rotating disc 36 to rotate, and the rotating disc 36 drives the concave plate 37 to rotate around the axis of the pipe. When the concave plate 37 rotates, the clamping ring 38 connected with the inner wall of the concave plate 37 rotates synchronously, and the clamping ring 38 in turn drives the pipe to rotate around its own axis. At the same time, the rotation of the clamping ring 38 drives one end of the driven rod 39 to rotate synchronously, and the other end of the driven rod 39 pulls the sliding ring 42 to slide along the inner wall of the groove ring 41. The sliding ring 42 follows the rotation along the annular track, keeping collinear with the axis of the pipe. Through the cooperation of the driven rod 39 and the sliding ring 42, the radial deviation of the clamping ring 38 during rotation is effectively avoided, ensuring the stable rotation of the pipe. After the flaw detection is completed, the control motor 3 is reversed to drive the force-retracting plate 17 of the limiting mechanism 101 away from the pipe, the right-angle telescopic plate 31 is extended, the driven ring 34 and the clamping ring 38 are moved away from the pipe, and the clamping ring 38 is separated from the end of the pipe. At the same time, the power device 35 stops working, the sliding ring 42 is reset to the initial position of the groove ring 41 with the driven rod 39, and waits for the next detection.

[0045] In some embodiments, the detection mechanism 50 further comprises a pull-down rod 58, one end of which is fixedly connected to the bottom of the U-shaped support plate 55, and the other end of which is fixedly connected to the two sides of the placement ring 6. When the placement ring 6 moves up and down, the U-shaped support plate 55 is driven to slide along the sliding groove through the pull-down rod 58.

[0046] One end of the pull-down rod 58 is fixedly connected to the bottom of the U-shaped support plate 55 of the detection mechanism 50, and the other end is fixedly connected to the two sides of the placement ring 6. The U-shaped support plate 55 is slidingly connected to the sliding groove on the surface of the support frame 2 at both ends, and can only move in the vertical direction. During operation, the up-and-down movement of the placement ring 6 is caused by the action of the limiting mechanism 101: the motor 3 drives the gear disc 21 to rotate, which drives the sliding plate 12 to move through meshing with the rack 13. The T-shaped contact frame 20 on the surface of the bent plate 14 presses the elastic frame 10, which is pushed by the push rod 9 and the expansion rod 8 to make the sliding block 4 slide. The sliding block 4 pulls the placement ring 6 down through the push plate 5, and at this time the pull-down rod 58 moves down with the placement ring 6, driving the U-shaped support plate 55 to slide along the sliding groove, so that the electric telescopic rod 56 and the inner wall detection device 57 in the inner wall of the U-shaped support plate 55 move down synchronously, until the axis of the inner wall detection device 57 is horizontally aligned with the axis of the pipe, to prepare for the subsequent detection of the pipe. After the detection is completed, the limiting mechanism is reset to make the placement ring 6 move up, and the pull-down rod 58 drives the U-shaped support plate 55 and the inner wall detection device 57 to move up and reset. Through this design, no additional driving device needs to be added to the detection mechanism, and automatic and accurate alignment is achieved through linkage, which not only improves the detection efficiency and alignment accuracy, but also simplifies the structure of the device and reduces the risk of failure.

[0047] As a possible implementation, the inner wall of the placement ring 6 is in contact with the outer surface of the pipe 11, the axis of the inner wall detection device 57 is collinear with the axis of the pipe 11, and the detection end of the inner wall detection device 57 is opposite to the inner surface of the pipe 11 when it extends into the pipe 11.

[0048] The inner wall of the placement ring 6 is in contact with the outer surface of the pipe 11, which can provide initial stable support for the pipe 11 and avoid the pipe 11 from shifting during the placement stage, laying a foundation for the subsequent accurate limiting of the limiting mechanism 101 and stable clamping of the rotating mechanism 30. The axis of the inner wall detection device 57 is collinear with the axis of the pipe 11, which can ensure that the inner wall detection device 57 always maintains a uniform distance with the inner wall of the pipe 11 when it extends along the axial direction of the pipe 11, and will not scratch the inner wall of the pipe 11 due to axis deviation, while ensuring that the detection end can accurately align with the to-be-detected area of the inner surface of the pipe 11, thereby improving the detection accuracy of the inner surface.

[0049] As a possible implementation manner, the axis of the driven ring 34 is collinear with the axis of the pipe 11, and the axis of the rotating disc 36 is collinear with the axis of the driven ring 34. The detection end of the outer surface detection device 54 faces the outer surface of the pipe 11, and the detection end is attached to the outer surface of the pipe 11 when the outer surface detection device 54 moves.

[0050] The axes of the driven ring 34, the rotating disc 36 and the pipe 11 are collinear, which can ensure that, when the rotating mechanism 30 works, the power device 35 drives the clamping ring 38 to rotate through the rotating disc 36 and the concave plate 37, and the pipe 11 can rotate stably and uniformly around its own axis, and will not produce eccentric rotation due to axis deviation, thereby providing a stable rotating basis for full-circle detection. In addition, the detection end of the outer surface detection device 54 faces the outer surface of the pipe 11 and is attached to the outer surface when the outer surface detection device 54 moves, which can make the detection end closely contact with the outer surface of the pipe 11, eliminate the detection gap, avoid the attenuation or distortion of the detection signal caused by the gap, ensure that the defects such as the unfirm welding and cracks on the outer surface can be accurately identified, and further improve the reliability and comprehensiveness of the outer surface detection.

[0051] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details, and do not limit the present application to the specific embodiments described. Obviously, according to the content of the present application, many modifications and changes can be made. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A pipe flaw detection device, characterized in that, The system includes a workbench (1), with support frames (2) fixedly connected to both sides of the workbench (1), and the top of the support frames (2) connected to a motor (3); a groove is provided on the surface of the workbench (1), and a slider (4) is slidably connected to the inner wall of the groove; a push plate (5) is rotatably connected to the top of the slider (4); the end of the push plate (5) away from the slider (4) is rotatably connected to a placement ring (6) for supporting the pipe (11); a support telescopic rod (7) is connected to the bottom of the placement ring (6), and the end of the support telescopic rod (7) away from the placement ring (6) is connected to the groove. The groove is connected to the inner wall; it also includes a limiting mechanism (101) to prevent the pipe (11) from shaking during flaw detection, a rotating mechanism (30) to drive the pipe (11) to rotate to achieve full circumference detection, and a detection mechanism (50) to simultaneously detect the outer and inner surfaces of the pipe (11); the limiting mechanism (101) includes a force-bearing telescopic plate (17), one end of which is connected to a limiting ring (18), and the inner wall of the limiting ring (18) is rotatably connected to a contact wheel (19) for contacting the outer surface of the pipe (11); rotation The mechanism (30) includes a concave plate (37) and a power unit (35). The inner wall of the concave plate (37) is slidably connected to a clamping ring (38) for clamping the end of the pipe (11). The surface of the clamping ring (38) is hinged to the driven rod (39). The power unit (35) is used to drive the concave plate (37) and the clamping ring (38) to rotate around the axis of the pipe (11). The detection mechanism (50) includes a U-shaped support plate (55) and a motor (51). An electric telescopic rod (56) is connected to the inner wall of the U-shaped support plate (55). The output end of 6) is connected to the inner wall detection device (57) for extending into the pipe (11); the surface of the motor (51) is fixedly connected to the surface of the support frame (2), the output end of the motor (51) is connected to the threaded rod (52), the surface of the threaded rod (52) is threadedly connected to the threaded plate (53), and the end of the threaded plate (53) is fixedly connected to the outer surface detection device (54) for fitting the outer surface of the pipe (11); the surface of the support frame (2) is provided with a groove, and the two ends of the U-shaped support plate (55) are slidably connected to the inner wall of the groove.

2. The pipe flaw detection device according to claim 1, characterized in that: The limiting mechanism (101) also includes a slide plate (102), the top of which is fixedly connected to the top of the inner wall of the support frame (2), and the inner wall of the slide plate (102) is slidably connected to the slide plate (12); the top of the slide plate (12) is fixedly connected to the rack (13), and the output end of the motor (3) is fixedly connected to a gear plate (21) that meshes with the rack (13). When the gear plate (21) rotates, it drives the rack (13) and the slide plate (12) to move along the length direction of the slide plate (102).

3. The pipe flaw detection device according to claim 2, characterized in that: The bottom of the slide plate (12) is connected to the curved plate (14). The end of the curved plate (14) away from the slide plate (12) is fixedly connected to the grooved plate (15). The inner wall of the grooved plate (15) is slidably connected to the elastic plate (16). The end of the elastic plate (16) away from the grooved plate (15) is in contact with the outer surface of the limiting ring (18). The end of the force-bearing telescopic plate (17) away from the limiting ring (18) is fixedly connected to both ends of the grooved plate (15).

4. The pipe flaw detection device according to claim 3, characterized in that: The surface of the bent plate (14) is connected to the T-shaped contact frame (20); the surface of the slider (4) is rotatably connected to the expansion rod (8); the end of the expansion rod (8) away from the slider (4) is rotatably connected to the push rod (9); the end of the push rod (9) away from the expansion rod (8) is connected to the elastic frame (10); when the T-shaped contact frame (20) moves, it contacts the surface of the elastic frame (10) and squeezes the elastic frame (10).

5. A pipe flaw detection device according to claim 1, characterized in that: The rotating mechanism (30) also includes a right-angle telescopic plate (31), one end of which is fixedly connected to the end of the workbench (1). Push plates (32) are hinged on both sides of the right-angle telescopic plate (31). The end of the push plate (32) away from the right-angle telescopic plate (31) is hinged to a right-angle rod (33). The end of the right-angle rod (33) away from the push plate (32) is fixedly connected to the surface of the force-bearing telescopic plate (17).

6. The pipe flaw detection device according to claim 5, characterized in that: The right-angle telescopic plate (31) is connected to the driven ring (34) at one end away from the workbench (1). The surface of the power device (35) is fixedly connected to the outer surface of the driven ring (34). The output end of the power device (35) is connected to the turntable (36). The side of the turntable (36) away from the power device (35) is fixedly connected to the outer surface of the concave plate (37).

7. A pipe flaw detection device according to claim 6, characterized in that: The surface of the support frame (2) is connected to the long rod (40), and the end of the long rod (40) away from the support frame (2) is connected to the grooved ring (41). The inner wall of the grooved ring (41) is slidably connected to the slip ring (42), and the end of the driven rod (39) away from the clamping ring (38) is hinged to the outer surface of the slip ring (42).

8. A pipe flaw detection device according to claim 1, characterized in that: The detection mechanism (50) also includes a pull rod (58), one end of which is fixedly connected to the bottom of the U-shaped support plate (55), and the other end of which is fixedly connected to both sides of the placement ring (6). When the placement ring (6) moves up and down, the pull rod (58) drives the U-shaped support plate (55) to slide along the groove.

9. A pipe flaw detection device according to claim 1, characterized in that: The inner wall of the placement ring (6) is in contact with the outer surface of the pipe (11), the axis of the inner wall detection device (57) is collinear with the axis of the pipe (11), and the detection end of the inner wall detection device (57) when it extends into the pipe (11) is opposite to the inner surface of the pipe (11).

10. A pipe flaw detection device according to claim 6, characterized in that: The axis of the driven ring (34) is collinear with the axis of the pipe (11), and the axis of the turntable (36) is collinear with the axis of the driven ring (34); the detection end of the outer surface detection device (54) faces the outer surface of the pipe (11), and the detection end of the outer surface detection device (54) is in contact with the outer surface of the pipe (11) when it moves.

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