Pipeline defect detection device

Abstract

The invention provides a pipeline defect detection device, and relates to the technical field of pipeline detection devices. The invention provides a pipeline defect detection device which comprises a mounting seat, a first driving mechanism, a clamping assembly, a third driving mechanism and a defect detection piece, and the first driving mechanism is arranged on the mounting seat. The two clamping assemblies are oppositely arranged on the mounting base in a spaced mode in the first direction. The clamping and holding assembly comprises supports, two clamping and holding pieces and a second driving mechanism, the supports are movably connected with the mounting base, and the two clamping and holding pieces are arranged on the corresponding supports at intervals in the second direction and movably connected with the supports. The two defect detection pieces are arranged on the mounting base at intervals in the first direction and are movably connected with the mounting base; through the synergistic effect of the first driving mechanism, the second driving mechanism and the third driving mechanism, the clamping assembly can adapt to the to-be-detected pipelines with different pipe diameters, the clamp does not need to be frequently replaced, and the detection efficiency is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline detection devices, and in particular to a pipeline defect detection device. Background Art

[0002] In today's society, various pipeline systems are widely used in many important fields, including oil, natural gas, chemical industry, municipal water supply and drainage. These pipelines often need to be buried underground for a long time or installed in complex submarine environments. With the increase of service time and the influence of external factors (such as soil corrosion, pressure changes, water erosion, etc.), pipelines are prone to defects such as cracks, holes, corrosion and thinning.

[0003] The existing pipeline detection device includes a fixing mechanism and a detection mechanism. The fixing mechanism is fixed to the pipeline through a mechanical structure and drives the detection mechanism to move along the pipeline wall to realize pipeline detection.

[0004] Although the above solution can achieve the purpose of detecting pipelines, it often requires replacing fixing mechanisms of different specifications when facing pipelines of different diameters. It has poor versatility and is not flexible enough in adjusting the position and spacing of the detection mechanism, making it difficult to meet diverse detection needs. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present application provides a pipeline defect detection device that is applicable to pipelines of different diameters.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] An embodiment of the present application provides a pipeline defect detection device, including a mounting base;

[0008] A first driving mechanism is provided on the mounting seat;

[0009] Two clamping assemblies are spaced apart and arranged opposite to each other on the mounting seat along a first direction;

[0010] The clamping assembly includes a bracket, two clamping members, and a second driving mechanism, wherein the bracket is movably connected to the mounting seat, and the two clamping members are arranged on the corresponding brackets at intervals along a second direction and are movably connected to the brackets, the first direction is perpendicular to the second direction, the first driving mechanism is configured to drive the brackets in the two clamping assemblies to move in a direction toward or away from each other, and the second driving mechanism is configured to drive the two clamping members corresponding thereto to move in a direction toward or away from each other, so that the spacing between the two clamping members in the first direction and the second direction is adjustable;

[0011] A third driving mechanism and two defect detection pieces, the two defect detection pieces are arranged on the mounting seat at intervals along the first direction and are movably connected to the mounting seat, and the third driving mechanism is constructed to drive the two defect detection pieces to move toward or away from each other so that the distance between the two defect detection pieces is adjustable.

[0012] In an embodiment of the present application, the first driving mechanism, the second driving mechanism and the third driving mechanism all have a first driving direction and a second driving direction, and the first driving direction is opposite to the second driving direction.

[0013] In the embodiment of the present application, the first driving mechanism includes a first driving motor, a first gear set, and a first rotating assembly. The first driving motor is fixed to the mounting base. The first rotating assembly is rotatably disposed on the mounting base and extends along the first direction. The first gear set is connected between the driving shaft of the first driving motor and the first rotating assembly.

[0014] Along the first direction, the peripheral wall of the first rotating assembly has two first external threads spaced apart from each other, and the brackets in the two clamping assemblies have first internal threads matching the corresponding first external threads, and the first external threads are threadedly engaged with the corresponding first internal threads;

[0015] When the driving shaft of the first driving motor rotates in different directions, the first rotating assembly is driven by the first gear set to rotate forward or reverse around its own axis, so as to drive the brackets in the two clamping assemblies to move toward or away from each other.

[0016] In the embodiment of the present application, the first rotating component is a first screw, and the mounting seat has first bearing seats at positions corresponding to the two ends of the first screw, and the two ends of the first screw are respectively rotatably arranged on the first bearing seats;

[0017] The top end of the bracket is provided with a first nut matching the first screw rod, the mounting seat is provided with a first avoidance notch, the first nut passes through the first avoidance notch and is screwed into the first screw rod; and / or,

[0018] The axis of the output shaft of the first gear set is arranged to intersect with the axis of the drive shaft of the first drive motor.

[0019] In an embodiment of the present application, the mounting seat has a first sliding portion on a side facing the bracket, the bracket has a connecting portion, and the connecting portion has a second sliding portion matching the first sliding portion, and the first sliding portion and the second sliding portion slide in cooperation with each other.

[0020] In the embodiment of the present application, the first sliding portion is one of a slide rail and a slider, and the second sliding portion is the other of the slide rail and the slider.

[0021] In the embodiment of the present application, each of the clamping assemblies further comprises two connecting frames, and the two clamping members are respectively connected to the two connecting frames, wherein one clamping member is mounted on one connecting frame, and the connecting frame is slidably connected to the bracket;

[0022] The second driving mechanism includes a second driving motor, a second gear set and a second rotating assembly, the second driving motor is fixedly mounted on the bracket, the second rotating assembly is rotatably mounted on the bracket and extends along the second direction, and the second gear set is connected between the driving shaft of the second driving motor and the second rotating assembly;

[0023] Along the second direction, the peripheral wall of the second rotating assembly has two second external threads spaced apart from each other, the connecting frame has a second internal thread matching the second external thread, and the second external thread and the second internal thread are screwed together;

[0024] When the driving shaft of the second driving motor rotates in different rotation directions, the second rotating assembly is driven by the second gear set to rotate forward or reverse around its own axis, so as to drive the two clamping members on the bracket to move toward or away from each other along the second direction.

[0025] In the embodiment of the present application, the second rotating component is a second screw, and along the second direction, the two ends of the bracket are respectively provided with second bearing seats, the two ends of the second screw are respectively rotatably connected to the corresponding second bearing seats, and the connecting frame includes a second nut matching the second screw; and / or,

[0026] The axis of the output shaft of the second gear set is arranged to intersect with the axis of the drive shaft of the second drive motor.

[0027] In an embodiment of the present application, the bracket has a third sliding portion extending along the second direction, and the connecting frame has a fourth sliding portion matching the third sliding portion, and the third sliding portion and the fourth sliding portion slide in cooperation with each other.

[0028] In an embodiment of the present application, the clamping member includes a hub motor, a hub and a Mecanum wheel. The hub is coaxially arranged with the output shaft of the hub motor and is rotatably connected to the connecting frame. The Mecanum wheel is sleeved on the outer circumference of the hub and is configured to clamp the pipeline to be inspected.

[0029] In the embodiment of the present application, the third driving mechanism includes a third driving motor, a third gear set, a third rotating assembly and two connecting seats;

[0030] The third drive motor is fixedly mounted on the mounting base, the third rotating assembly is rotatably mounted on the mounting base and extends along the first direction, the third gear set is connected between the drive shaft of the third drive motor and the third rotating assembly, the two defect detection members are respectively mounted on the two connecting bases, one defect detection member is connected to one connecting base, and the two connecting bases are respectively slidably connected to the mounting base;

[0031] Along the first direction, the peripheral wall of the third rotating assembly has two third external threads spaced apart from each other, the connecting seat has a third internal thread matching the third external thread, and the third external thread and the third internal thread are threadedly engaged;

[0032] When the driving shaft of the third driving motor rotates in different rotation directions, the third rotating assembly is driven by the third gear set to rotate forward or reverse around its own axis, so as to drive the two connecting seats and their corresponding defect detection parts to move toward or away from each other.

[0033] In the embodiment of the present application, the third rotating assembly is a third screw, the connecting seat has a third nut matching the third screw, and the third screw is threadedly engaged with the third nut; and / or,

[0034] The axis of the output shaft of the third gear set is arranged to intersect with the axis of the drive shaft of the third drive motor.

[0035] In the embodiment of the present application, the defect detection component is a weak magnetic sensor;

[0036] The pipeline defect detection device also includes a sensor housing and a first sealing ring. The sensor housing has a first accommodating cavity. The weak magnetic sensor is arranged in the first accommodating cavity. The first sealing ring is used to seal the gap around the accommodating cavity.

[0037] An embodiment of the present application provides a pipeline defect detection device, comprising a mounting seat, a first drive mechanism, a clamping assembly, a third drive mechanism, and a defect detection piece, wherein the first drive mechanism is arranged on the mounting seat. Two clamping assemblies are spaced apart and arranged relatively to each other on the mounting seat along a first direction. The clamping assembly comprises a bracket, two clamping pieces, and a second drive mechanism, wherein the bracket is movably connected to the mounting seat, and the two clamping pieces are spaced apart along a second direction on the corresponding bracket and movably connected to the bracket. Two defect detection pieces are spaced apart along the first direction on the mounting seat and movably connected to the mounting seat. Through the coordinated action of the first drive mechanism, the second drive mechanism, and the third drive mechanism, the clamping assembly can adapt to pipelines to be tested of different diameters without the need for frequent replacement of fixtures, thereby greatly improving the detection efficiency.

[0038] In addition to the technical problems solved by the embodiments of the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the pipeline defect detection device provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A schematic diagram of the structure of a pipeline defect detection device provided in an embodiment of the present application;

[0041] Figure 2 for Figure 1 A top view of the pipeline defect detection device;

[0042] Figure 3 for Figure 2 Enlarged view of the middle gear set;

[0043] Figure 4 for Figure 1 Front view of the pipeline defect detection device;

[0044] Figure 5 for Figure 1 Schematic diagram of the structure of the middle clamping assembly;

[0045] Figure 6 for Figure 5 Schematic diagram of the structure of the middle clamping piece;

[0046] Figure 7 This is a schematic diagram of the placement of four weak magnetic sensors.

[0047] Description of reference numerals:

[0048] 100 - mounting seat; 110 - first bearing seat; 120 - first avoidance gap; 130 - first sliding portion;

[0049] 200 - first driving mechanism; 210 - first driving motor; 220 - first gear set; 230 - first rotating assembly;

[0050] 300-clamping assembly; 310-bracket; 311-second bearing seat; 320-clamping member; 321-hub motor; 322-wheel hub; 323-Mecanum wheel; 324-steering drive motor; 325-steering seat; 326-worm gear; 327-worm; 328-hub motor seat; 330-second drive mechanism; 331-second drive motor; 332-second gear set; 333-second rotating assembly; 334-second external thread; 340-first nut; 350-connecting member; 360-connecting portion; 361-second sliding portion; 370-connecting frame; 380-second nut; 390-third sliding portion;

[0051] 400 - third drive mechanism; 410 - third drive motor; 420 - third gear set; 430 - third rotating assembly; 431 - third external thread; 440 - connecting seat; 441 - third nut;

[0052] 500-defect inspection pieces. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0054] In today's society, various pipeline systems are widely used in numerous important sectors, including oil, natural gas, chemicals, and municipal water supply and drainage. Submarine pipeline transportation, with its efficiency, safety, and cost-effectiveness, has become a core component of modern urban infrastructure. However, as pipelines age, corrosion becomes increasingly serious. Pipeline corrosion not only causes environmental pollution but also leads to serious pipeline safety accidents.

[0055] Common submarine pipeline inspection methods usually use pipeline inspection devices to perform inspections outside the pipeline. Pipeline inspection devices have the advantages of being non-invasive, safe, efficient, and low-cost, and are widely used in submarine pipeline inspection tasks.

[0056] However, existing pipeline inspection devices can only inspect pipes of a certain size or within a narrow range of diameters. This requires purchasing multiple sets of specialized off-pipe inspection devices for different diameters, increasing costs. Furthermore, frequent replacement of pipeline inspection devices significantly reduces inspection efficiency.

[0057] In order to overcome the defects in the prior art, an embodiment of the present application provides a defect detection device that is applicable to pipes of different diameters.

[0058] The contents of this application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of this application more clearly and in detail.

[0059] in, Figure 1 This is a schematic diagram of the structure of the pipeline defect detection device provided in an embodiment of the present application. Figure 1 Where a represents the first direction and b represents the second direction. Figure 2 for Figure 1 Top view of the pipeline defect detection device. Figure 3 for Figure 2 Enlarged view of the middle gear set; Figure 4 for Figure 1 Front view of the pipeline defect detection device; Figure 5 for Figure 1 Schematic diagram of the structure of the middle clamping assembly; Figure 6 for Figure 5 Schematic diagram of the structure of the middle clamping piece; Figure 7 This is a schematic diagram of the placement of four weak magnetic sensors.

[0060] The specific structure of the pipeline defect detection device and various possible implementation methods are described in detail below.

[0061] like Figure 1 As shown, in an embodiment of the present application, a pipeline defect detection device is provided, comprising:

[0062] The mounting base 100, the first driving mechanism 200 and the clamping assembly 300 are provided on the mounting base 100. The two clamping assemblies 300 are spaced apart and arranged opposite to each other on the mounting base 100 along a first direction. The clamping assembly 300 includes a bracket 310, two clamping members 320 and a second driving mechanism 330. The bracket 310 is movably connected to the mounting base 100. The two clamping members 320 are spaced apart and movably connected to the corresponding bracket 310 along a second direction. The first direction is perpendicular to the second direction. The first driving mechanism 200 is configured to drive the brackets 310 in the two clamping assemblies 300 to move toward or away from each other. The second driving mechanism 330 is configured to drive the two clamping members 320 corresponding thereto to move toward or away from each other, so that the spacing between the two clamping members 320 in the first direction and the second direction is adjustable.

[0063] The third driving mechanism 400 and the two defect detection pieces 500 are arranged on the mounting base 100 at intervals along the first direction and are movably connected to the mounting base 100. The third driving mechanism 400 is constructed to drive the two defect detection pieces 500 to move toward or away from each other so that the distance between the two defect detection pieces 500 is adjustable.

[0064] Among them, the mounting base 100 is a frame structure made of high-strength aluminum alloy material, two first driving mechanisms 200 are provided at the opposite ends of the top of the mounting base 100, two clamping components 300 are connected to the corresponding two first driving mechanisms 200, and the third driving mechanism 400 is provided between the two first driving mechanisms 200.

[0065] The first driving mechanism 200 adjusts the spacing between the two clamping assemblies 300 in the first direction according to the diameter of the pipe to be tested, ensuring that the two clamping assemblies 300 can clamp the pipe to be tested in the first direction. The second driving mechanism 330 then adjusts the spacing between the two clamping members 320 in the second direction, ensuring that the two clamping members 320 can clamp the pipe to be tested in the second direction, thereby fixing the mounting base 100 on the pipe to be tested. The third driving mechanism 400 then drives the two defect detection members 500 to perform inspection on the pipe to be tested.

[0066] Through the coordinated action of the first drive mechanism 200, the second drive mechanism 330 and the third drive mechanism 400, the clamping assembly 300 can adapt to pipes of different diameters to be tested, eliminating the need for frequent replacement of clamps, thereby greatly improving detection efficiency.

[0067] Furthermore, the distance between the two defect detection parts 500 can be adjusted synchronously, so as to cover detection points at different positions of the pipeline, thereby realizing all-round and no-dead-angle detection of the pipeline.

[0068] Therefore, by providing a clamping assembly 300 with adjustable spacing, the device can accommodate pipes of varying diameters, enhancing its versatility. The adjustable spacing of the clamping assembly 300 in both directions ensures stable clamping of the pipe, preventing device wobbling during testing that could affect the results. The third drive mechanism 400 adjusts the spacing between the defect detection elements 500, allowing for flexible adjustment of the detection position and range based on testing requirements, improving both accuracy and comprehensiveness of testing.

[0069] The bracket 310 is a C-shaped structure, with its top connected to the first drive mechanism 200 and internally provided with a clamping member 320 and a second drive mechanism 330. The clamping member 320 is slidably connected to the bracket 310 along the second direction, and the second drive mechanism 330 is used to drive the clamping member 320 to move.

[0070] It should be noted that the clamping assembly 300 and the first driving mechanism 200 can be simultaneously arranged at the bottom of the mounting base 100, or can be arranged as follows. Figure 1 As shown, the mounting posts are provided on opposite sides. The third driving mechanism 400 and the defect detection member 500 are also provided. The clamping member 320 and the second driving mechanism 330 can be as shown. Figure 1 As shown, they are simultaneously arranged inside the bracket 310, and can also be arranged on two opposite sides of the bracket 310.

[0071] In the embodiment of the present application, the first driving mechanism 200 , the second driving mechanism 330 and the third driving mechanism 400 all have a first driving direction and a second driving direction, and the first driving direction and the second driving direction are opposite.

[0072] The first driving mechanism 200 , the second driving mechanism 330 and the third driving mechanism 400 all use bidirectional motors as power sources, and the forward and reverse rotations of the motors correspond to the first driving direction and the second driving direction, respectively.

[0073] For example, the first driving direction of the first driving mechanism 200, the second driving mechanism 330, and the third driving mechanism 400 is to drive the two brackets 310, the two clamping members 320, and the two defect detection members 500 toward each other. Correspondingly, the second driving direction of the first driving mechanism 200, the second driving mechanism 330, and the third driving mechanism 400 is to drive the two brackets 310, the two clamping members 320, and the two defect detection members 500 away from each other.

[0074] Since the driving mechanism has two opposite driving directions, the motion control of each component is more flexible and precise, and fine adjustment of the distance between the clamping assembly 300 and the defect detection component 500 can be achieved to meet the detection requirements under different working conditions. At the same time, it simplifies the design of the control system and reduces equipment costs.

[0075] Combine Figure 2 and Figure 3 As shown, in an embodiment of the present application, the first driving mechanism 200 includes a first driving motor 210, a first gear set 220 and a first rotating assembly 230. The first driving motor 210 is fixed to the mounting base 100, and the first rotating assembly 230 is rotatably disposed on the mounting base 100 and extends along a first direction. The first gear set 220 is connected between the driving shaft of the first driving motor 210 and the first rotating assembly 230.

[0076] Along the first direction, the peripheral wall of the first rotating component 230 has two first external threads spaced apart from each other, and the brackets 310 in the two clamping components 300 have first internal threads matching the corresponding first external threads, and the first external threads are screwed together with the corresponding first internal threads.

[0077] When the driving shaft of the first driving motor 210 rotates in different directions, the first rotating assembly 230 is driven by the first gear set 220 to rotate forward or reverse around its own axis, thereby driving the brackets 310 in the two clamping assemblies 300 to move toward or away from each other.

[0078] The transmission system utilizes a combination of gears and lead screws, resulting in high efficiency and precision, stably and reliably driving the bracket 310 of the clamping assembly 300. Bearings support the first lead screw at both ends, ensuring rotational stability and reducing wear. The intersecting arrangement of the gears creates a more compact structure, saving installation space.

[0079] In the embodiment of the present application, the first rotating component 230 is a first screw, and a first bearing seat 110 is provided at positions on the mounting seat 100 corresponding to the two ends of the first screw, and the two ends of the first screw are respectively rotatably arranged on the first bearing seat 110.

[0080] The top end of the bracket 310 has a first nut 340 that matches the first screw rod. The mounting base 100 has a first relief notch 120. The first nut 340 passes through the first relief notch 120 and is threadedly engaged with the first screw rod. Alternatively, the axis of the output shaft of the first gear set 220 may intersect with the axis of the drive shaft of the first drive motor 210.

[0081] The first drive motor 210 is a stepper motor and is fixedly mounted on the top of the mounting base 100. A first gear set 220, comprised of helical gears, connects the drive shaft of the first drive motor 210 to the first rotating assembly 230. The axis of the output shaft of the first gear set 220 intersects perpendicularly with the axis of the drive shaft of the first drive motor 210. A first lead screw is horizontally arranged on the mounting base 100 along a first direction, with both ends mounted within the first bearing block 110 for rotation.

[0082] Connectors 350 are mounted on the tops of the two brackets 310. These connectors 350 are connected to first nuts 340, which threadably engage the first lead screw through the first clearance notch 120 in the mounting base 100. When the first drive motor 210 rotates forward, the first lead screw is driven forward by the first gear set 220, and the two brackets 310 are driven toward each other by the threaded mechanism. When the motor rotates reversely, the brackets 310 move away from each other.

[0083] Exemplarily, the first rotating assembly 230 includes a first screw, a first gear set 220 is arranged in the middle of the first screw, the first gear set 220 includes two mutually perpendicular helical gears, one of which is sleeved on the side wall of the first screw, and the other helical gear is arranged on the output shaft of the first drive motor 210 through a coupling.

[0084] The first drive motor 210 drives the first screw to rotate through the cooperation of two bevel gears, thereby driving the bracket 310 on it to move. At this time, the two first external threads on the first screw have opposite thread rotation directions, ensuring that when the first screw rotates, the first nut 340 that cooperates with the two first external threads drives the two brackets 310 to move closer to or away from each other.

[0085] For example, Figure 3 As shown, the first rotating assembly 230 includes two first lead screws, and the first gear set 220 includes four helical gears arranged perpendicular to each other, forming a cross structure. Two opposing helical gears are connected to one end of a corresponding first lead screw, the other end of which is connected to the first bearing seat 110. The other two opposing helical gears are mounted on the mounting base 100 via the helical gear bearing seat, one of which is connected to the first drive motor 210 via a connecting shaft.

[0086] The first drive motor 210 drives the two first screws to rotate through the cooperation of the four bevel gears of the cross structure, thereby driving the bracket 310 thereon to move. At this time, the thread rotation direction of the two first external threads on the first screw is the same, ensuring that when the first screw rotates, the first nut 340 that cooperates with the two first external threads drives the two brackets 310 to move closer to or away from each other.

[0087] The transmission system utilizes a combination of gears and lead screws, resulting in high efficiency and precision, stably and reliably driving the bracket 310 of the clamping assembly 300. Bearings support the first lead screw at both ends, ensuring rotational stability and reducing wear. The intersecting arrangement of the gears creates a more compact structure, saving installation space.

[0088] like Figure 4As shown, in the embodiment of the present application, the side of the mounting base 100 facing the bracket 310 has a first sliding portion 130, the bracket 310 has a connecting portion 360, and the connecting portion 360 has a second sliding portion 361 that matches the first sliding portion 130, and the first sliding portion 130 and the second sliding portion 361 slide in cooperation with each other.

[0089] Two parallel rails are mounted on the side of the mounting base 100 facing the bracket 310, serving as first sliding portions 130. Two sliders are positioned corresponding to the connecting portion 360 of the bracket 310, serving as second sliding portions 361. The sliders closely cooperate with the rails to enable the bracket 310 to slide along a first direction on the mounting base 100. During the sliding process, the first sliding portion 130 and the second sliding portion 361 cooperate with each other to guide the direction of movement of the bracket 310, ensuring stable movement of the bracket 310.

[0090] The sliding fit between the first sliding portion 130 and the second sliding portion 361 provides good guidance and support for the movement of the bracket 310, reduces friction and shaking during the movement of the bracket 310, makes the movement of the clamping assembly 300 more stable and accurate, and improves the overall stability and reliability of the device.

[0091] In the embodiment of the present application, the first sliding portion 130 is one of a sliding rail and a sliding block, and the second sliding portion 361 is the other of the sliding rail and the sliding block.

[0092] A T-shaped rail can be installed on the mounting base 100 as the first sliding portion 130, and a T-shaped slider compatible with the rail can be installed on the connection portion 360 of the bracket 310 as the second sliding portion 361. Alternatively, the configuration can be reversed. During installation, ensure the precise fit between the rail and slider. Bolt the rail to the mounting base 100 and the slider to the connection portion 360 of the bracket 310 to ensure flexible and stable sliding between them.

[0093] The standardized structure of the rails and sliders facilitates manufacturing, installation, and maintenance, reducing production costs. This precise fit effectively limits the displacement of the bracket 310 in the non-moving direction, further improving the stability and accuracy of the bracket 310's movement, thereby enhancing the stability and reliability of the clamping assembly 300 in clamping the pipe.

[0094] like Figure 4 and Figure 5 As shown, in the embodiment of the present application, each clamping assembly 300 also includes two connecting frames 370, and the two clamping members 320 are respectively connected to the two connecting frames 370, wherein one clamping member 320 is installed on one connecting frame 370, and the connecting frame 370 is slidably connected to the bracket 310.

[0095] The second driving mechanism 330 includes a second driving motor 331, a second gear set 332 and a second rotating component 333. The second driving motor 331 is fixedly mounted on the bracket 310. The second rotating component 333 is rotatably mounted on the bracket 310 and extends along the second direction. The second gear set 332 is connected between the driving shaft of the second driving motor 331 and the second rotating component 333.

[0096] Along the second direction, the peripheral wall of the second rotating assembly 333 has two second external threads 334 spaced apart from each other. The connecting frame 370 has a second internal thread matching the second external thread 334 . The second external thread 334 and the second internal thread are screwed together.

[0097] When the driving shaft of the second driving motor 331 rotates in different rotation directions, the second rotating component 333 is driven by the second gear set 332 to rotate forward or reverse around its own axis, so as to drive the two clamping members 320 on the bracket 310 to move in the second direction toward or away from each other.

[0098] In each clamping assembly 300, two connecting frames 370 are symmetrically distributed on the bracket 310 along the second direction, and the clamping members 320 are respectively installed on the connecting frames 370. The connecting frames 370 are slidably connected to the slide rails on the bracket 310 through sliders. The second drive motor 331 is fixedly mounted on one side of the bracket 310. The second gear set 332 is composed of two mutually meshing helical gears, connecting the drive shaft of the second drive motor 331 and the second rotating assembly 333. The second lead screw is arranged on the bracket 310 along the second direction, and its two ends are mounted in the second bearing seat 311 to achieve rotation. A second nut 380 is provided on the connecting frame 370, which is screwed into the second lead screw thread. When the second drive motor 331 rotates forward, the second lead screw is driven forward by the second gear set 332, and the two connecting frames 370 approach each other under the thread transmission, and the clamping members 320 are clamped. When the motor is reversed, the clamping members 320 are released.

[0099] By setting up the second driving mechanism 330 and the connecting frame 370, precise spacing adjustment of the clamping members 320 in the second direction is achieved, which can better adapt to pipe surfaces of different shapes and sizes and improve the tightness and stability of the clamping.

[0100] In this embodiment of the present application, the second rotating assembly 333 is a second lead screw. Along the second direction, the bracket 310 has a second bearing block 311 at each end. The second lead screw is rotatably connected to the corresponding second bearing block 311 at each end. The connecting frame 370 includes a second nut 380 that matches the second lead screw. Alternatively, the axis of the output shaft of the second gear set 332 is intersecting with the axis of the drive shaft of the second drive motor 331.

[0101] The structural design of the second lead screw and second bearing block 311 ensures the stability and transmission accuracy of the second rotating assembly 333, making the spacing adjustment of the clamping members 320 more accurate and reliable. The coordination of the second nut 380 with the second lead screw and the rational arrangement of the second gear set 332 improve the transmission efficiency and stability of the entire transmission system. The intersecting arrangement of the gear set axes optimizes the internal structural layout of the clamping assembly 300, saving space.

[0102] Exemplarily, similar to the first driving mechanism 200, the second rotating assembly 333 includes a second screw, a second gear set 332 is arranged in the middle of the second screw, and the second gear set 332 includes two mutually perpendicular helical gears, one of which is sleeved on the side wall of the second screw, and the other helical gear is arranged on the output shaft of the second driving motor 331 through a coupling.

[0103] The second drive motor 331 drives the second screw to rotate through the cooperation of two bevel gears, thereby driving the connecting frame 370 on it to move. At this time, the thread rotation directions of the two second external threads 334 on the second screw are opposite, ensuring that when the second screw rotates, the second nut 380 that cooperates with the two second external threads 334 drives the two connecting frames 370 to move closer to or away from each other.

[0104] Exemplarily, the second rotating assembly 333 includes two second lead screws, and the gear set includes four helical gears arranged perpendicularly to each other, forming a cross structure. Two opposing helical gears are connected to one end of a corresponding second lead screw, the other end of which is connected to the second bearing seat 311. The other two opposing helical gears are mounted on the mounting base 100 via the helical gear bearing seat, one of which is connected to the second drive motor 331 via a connecting shaft.

[0105] The second drive motor 331 drives the two second screws to rotate through the cooperation of the four bevel gears of the cross structure, thereby driving the connecting frame 370 thereon to move. At this time, the thread rotation direction of the two second external threads 334 on the second screw is the same, ensuring that when the second screw rotates, the second nut 380 that cooperates with the two second external threads 334 drives the two connecting frames 370 to move closer to or away from each other.

[0106] The second nut 380 is connected to the connecting frame 370 via a connecting member 350 .

[0107] In the embodiment of the present application, the bracket 310 has a third sliding portion 390 extending along the second direction, and the connecting frame 370 has a fourth sliding portion matching the third sliding portion 390. The third sliding portion 390 and the fourth sliding portion (not shown in the figure) slide together.

[0108] The third sliding portion 390 is a slide rail, and the fourth sliding portion is a slide groove provided on the connecting frame 370 .

[0109] The sliding cooperation between the third sliding part 390 and the fourth sliding part has good guiding and load-bearing capacity, which can effectively prevent the connecting frame 370 from offsetting and shaking during the sliding process, further improving the accuracy and stability of the spacing adjustment of the clamping parts 320, thereby improving the clamping effect of the clamping assembly 300 on the pipe.

[0110] like Figure 6 As shown, in the embodiment of the present application, the clamping member 320 includes a hub motor 321, a hub 322 and a Mecanum wheel 323. The hub 322 is coaxially arranged with the output shaft of the hub motor 321 and is rotatably connected to the connecting frame 370. The Mecanum wheel 323 is sleeved on the outer circumference of the hub 322 and is configured to clamp the pipeline to be inspected.

[0111] The hub motor 321 in the clamping device 320 is a small, high-torque DC motor. The hub 322 and the output shaft of the hub motor 321 are keyed together for coaxial arrangement. Hub 322 is mounted on the connecting frame 370 via bearings for free rotation. The Mecanum wheel 323, made of polyurethane, is bolted to the outer circumference of hub 322. When clamping the pipe, the hub motor 321 drives hub 322 to rotate, driving the Mecanum wheel 323 to roll. The omnidirectional movement of the Mecanum wheel 323 ensures stable clamping of the pipe and flexible movement within the pipe.

[0112] The clamping device 320, consisting of a hub motor 321, a hub 322, and a Mecanum wheel 323, not only provides stable clamping of the pipe, but also enables the device to more easily reach various inspection locations within the pipe, improving inspection efficiency and range. The flexible material and unique structure of the Mecanum wheel 323 adapt to pipes with varying surface conditions, minimizing damage to the pipe.

[0113] Among them, the clamping part 320 also includes a steering drive motor 324, a steering seat 325, a worm wheel 326, a worm 327 and a hub motor seat 328. The steering drive motor 324 and the steering seat 325 are both arranged on the connecting frame 370. The output shaft of the drive motor is connected to the worm 327. The turbine and the hub motor seat 328 are coaxially arranged on the steering seat 325. The worm 327 and the worm wheel 326 are engaged for transmission. The hub motor seat 328 is used to fix the hub motor 321.

[0114] The drive motor drives the hub motor 321 through the cooperation of the worm gear 326 and the worm 327, thereby driving the Mecanum wheel 323 on the hub 322 to rotate so that it can better abut against the pipeline to be tested.

[0115] Exemplarily, the clamping member 320 includes two or more wheel structures, each wheel structure including a hub motor 321, a hub 322 and a Mecanum wheel 323. The multiple wheel structures are used to achieve better clamping of the pipeline to be tested.

[0116] In the embodiment of the present application, the third driving mechanism 400 includes a third driving motor 410 , a third gear set 420 , a third rotating assembly 430 and two connecting seats 440 .

[0117] The third drive motor 410 is fixedly mounted on the mounting base 100, the third rotating assembly 430 is rotatably mounted on the mounting base 100 and extends along the first direction, the third gear set 420 is connected between the drive shaft of the third drive motor 410 and the third rotating assembly 430, and the two defect detection parts 500 are respectively arranged on two connecting seats 440, one defect detection part 500 is connected to one connecting seat 440, and the two connecting seats 440 are respectively slidably connected to the mounting base 100.

[0118] Along the first direction, the peripheral wall of the third rotating assembly 430 has two third external threads 431 spaced apart from each other, and the connecting seat 440 has a third internal thread matching the third external thread 431 , and the third external thread 431 and the third internal thread are threadedly engaged.

[0119] When the driving shaft of the third driving motor 410 rotates in different rotation directions, the third rotating assembly 430 is driven by the third gear set 420 to rotate forward or reverse around its own axis, so as to drive the two connecting seats 440 and their corresponding defect detection parts 500 to move toward or away from each other.

[0120] The third drive motor 410 is fixedly mounted between the two first drive mechanisms 200. The third gear set 420, consisting of two intermeshing helical gears, connects the drive shaft of the third drive motor 410 and the third rotating assembly 430 (third lead screw). The output axis of the third gear set 420 intersects perpendicularly with the axis of the drive shaft of the third drive motor 410. The third lead screw is horizontally arranged on the mounting base 100 along the first direction, with both ends mounted within the third bearing seat for rotation. Two connecting bases 440 are slidably connected to the slide rails on the mounting base 100 via sliders. A third nut 441 is machined on the connecting base 440 and threadedly engages with the third lead screw. The defect detection member 500 is fixedly mounted on the connecting base 440. When the third drive motor 410 rotates forward, the third lead screw is driven forward by the third gear set 420. The two connecting bases 440 move closer together due to the threaded transmission, and the distance between the defect detection member 500 decreases. When the motor rotates reversely, the distance increases.

[0121] In the embodiment of the present application, the third rotating assembly 430 is a third screw, and the connecting base 440 has a third nut 441 that matches the third screw, and the third screw is threadedly engaged with the third nut 441. Alternatively, the axis of the output shaft of the third gear set is arranged to intersect the axis of the drive shaft of the third drive motor 410.

[0122] For example, similar to the first drive mechanism 200, the third rotating assembly 430 includes a third screw, and a third gear set 420 is arranged in the middle of the third screw. The third gear set 420 includes two mutually perpendicular helical gears, one of which is sleeved on the side wall of the third screw, and the other helical gear is arranged on the output shaft of the third drive motor 410 through a coupling.

[0123] The third drive motor 410 drives the third screw to rotate through the cooperation of two bevel gears, thereby driving the connecting seat 440 on it to move. At this time, the thread rotation directions of the two second external threads 334 on the third screw are opposite, ensuring that when the third screw rotates, the third nut 441 that cooperates with the two third external threads 431 drives the two connecting seats 440 to move closer to or away from each other.

[0124] Exemplarily, the third rotating assembly 430 includes two third lead screws, and the gear set includes four helical gears arranged perpendicularly to each other, forming a cross structure. Two opposing helical gears are connected to one end of a corresponding third lead screw, the other end of which is connected to a third bearing seat. The other two opposing helical gears are mounted on the mounting base 100 via a helical gear bearing seat, one of which is connected to the third drive motor 410 via a connecting shaft.

[0125] The third drive motor 410 drives the two third screws to rotate through the cooperation of the four bevel gears of the cross structure, thereby driving the connecting seat 440 thereon to move. At this time, the two third external threads 431 on the third screw have the same thread rotation direction, ensuring that when the third screw rotates, the third nut 441 that cooperates with the two third external threads 431 drives the two connecting frames 370 to move closer to or away from each other.

[0126] The third nut 441 is connected to the connecting seat 440 via a connecting piece 350 .

[0127] In the embodiment of the present application, the defect detection component 500 is a weak magnetic sensor. The pipeline defect detection device also includes a sensor housing and a first sealing ring. The sensor housing has a first accommodating cavity. The weak magnetic sensor is arranged in the first accommodating cavity. The first sealing ring is used to seal the gap around the accommodating cavity. Among them, the defect detection component 500 adopts a high-precision weak magnetic sensor. The sensor housing is made of stainless steel and is processed into a box structure with a first accommodating cavity through a mold. The weak magnetic sensor is placed in the first accommodating cavity and fixed by potting glue. The first sealing ring is made of silicone rubber and installed on the opening edge of the sensor housing. The housing is sealed by bolts to ensure that the gap around the first accommodating cavity is sealed. During the detection process, the weak magnetic sensor can detect the weak magnetic field changes generated by defects on the pipeline surface and transmit the signal to the control system for analysis and processing.

[0128] The use of a weak magnetic sensor as the defect detection element 500 enables highly sensitive and accurate detection of defects on and near the pipeline surface. The sensor housing and first sealing ring effectively protect the weak magnetic sensor, preventing external factors such as dust and moisture from affecting its performance, thereby increasing its service life and detection stability. The sealed structural design also meets the requirements of industrial testing environments, enhancing the device's applicability and reliability.

[0129] like Figure 7 As shown, two weak magnetic sensors are respectively provided at the bottom of the two connecting bases 440. These four weak magnetic sensors are driven by the third drive motor 410 to move in the first direction. Thus, the four weak magnetic sensors can realize magnetic induction intensity and magnetic gradient detection with variable spacing.

[0130] The magnetic induction intensity and magnetic gradient detection formula in this embodiment is as follows.

[0131] G=

[0132] Where G is the magnetic gradient matrix, dimensionless.

[0133] is the magnetic induction intensity of sensor No. 1 in the x direction, is the magnetic induction intensity of sensor No. 2 in the x direction, is the magnetic induction intensity of sensor No. 3 in the x direction, is the magnetic induction intensity of sensor No. 4 in the x direction, unit is T.

[0134] is the magnetic induction intensity of sensor No. 1 in the y direction, is the magnetic induction intensity of sensor No. 2 in the y direction, is the magnetic induction intensity of sensor No. 3 in the y direction, is the magnetic induction intensity of sensor No. 4 in the y direction, unit is T.

[0135] is the magnetic induction intensity of sensor No. 1 in the z direction, is the magnetic induction intensity of sensor No. 2 in the z direction, is the magnetic induction intensity of sensor No. 3 in the z direction, is the magnetic induction intensity of sensor No. 4 in the z direction, unit is T.

[0136] The distance between sensor 1 and sensor 2, in mm.

[0137] The distance between sensor No. 1 and sensor No. 4, in mm.

[0138] In summary, by providing a clamping assembly 300 with adjustable spacing, this application can adapt to pipes of varying diameters, enhancing the versatility of the device. The adjustable spacing of the clamping assembly 300 in both directions ensures stable clamping of the pipe, preventing device wobbling during inspection from affecting test results. The third drive mechanism 400 adjusts the spacing between the defect detection elements 500, allowing for flexible adjustment of the inspection position and range based on testing requirements, thereby improving the accuracy and comprehensiveness of inspections.

[0139] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0140] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a" or "an" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0141] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0142] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0143] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or replace some or all of the technical features therein with equivalents. However, such modifications or replacements do not deviate from the essence of the corresponding technical solutions within the scope of the various embodiments of this application.

Claims

1. A pipeline defect detection device, characterized in that: include Mounting seat (100); A first driving mechanism (200) is provided on the mounting seat (100); Two clamping assemblies (300) are spaced apart and arranged opposite to each other on the mounting seat (100) along a first direction; The clamping assembly (300) comprises a bracket (310), two clamping members (320) and a second driving mechanism (330), wherein the bracket (310) is movably connected to the mounting seat (100), and the two clamping members (320) are arranged on the corresponding bracket (310) at intervals along the second direction and are movably connected to the bracket (310), wherein the first direction is perpendicular to the second direction, and the first driving mechanism (200) is configured to drive the brackets (310) in the two clamping assemblies (300) to move in a direction of approaching or moving away from each other, and the second driving mechanism (330) is configured to drive the two clamping members (320) corresponding thereto to move in a direction of approaching or moving away from each other, so that the spacing between the two clamping members (320) in the first direction and the second direction is adjustable; A third driving mechanism (400) and two defect detection members (500), wherein the two defect detection members (500) are spaced apart along a first direction on the mounting seat (100) and are movably connected to the mounting seat (100), and the third driving mechanism (400) is configured to drive the two defect detection members (500) to move in a direction toward or away from each other, so that the spacing between the two defect detection members (500) is adjustable.

2. The pipeline defect detection device according to claim 1, characterized in that: The first driving mechanism (200), the second driving mechanism (330) and the third driving mechanism (400) all have a first driving direction and a second driving direction, and the first driving direction and the second driving direction are opposite.

3. The pipeline defect detection device according to claim 2, characterized in that: The first driving mechanism (200) comprises a first driving motor (210), a first gear set (220) and a first rotating assembly (230); the first driving motor (210) is fixed to the mounting seat (100); the first rotating assembly (230) is rotatably disposed on the mounting seat (100) and extends along the first direction; the first gear set (220) is connected between a driving shaft of the first driving motor (210) and the first rotating assembly (230); Along the first direction, the peripheral wall of the first rotating assembly (230) has two first external threads spaced apart from each other, and the brackets (310) in the two clamping assemblies (300) have first internal threads matching the corresponding first external threads, and the first external threads are screwed together with the corresponding first internal threads; When the driving shaft of the first driving motor (210) rotates in different rotation directions, the first rotating assembly (230) is driven by the first gear set (220) to rotate forward or reverse around its own axis, thereby driving the brackets (310) in the two clamping assemblies (300) to move in directions of approaching or moving away from each other.

4. The pipeline defect detection device according to any one of claims 1 to 3, characterized in that: The mounting seat (100) has a first sliding portion (130) on a side facing the bracket (310), the bracket (310) has a connecting portion (360), and the connecting portion (360) has a second sliding portion (361) that matches the first sliding portion (130), and the first sliding portion (130) and the second sliding portion (361) are slidably matched with each other.

5. The pipeline defect detection device according to claim 4, characterized in that: The first sliding portion (130) is one of a sliding rail and a sliding block, and the second sliding portion (361) is the other of the sliding rail and the sliding block.

6. The pipeline defect detection device according to claim 3, characterized in that: Each of the clamping assemblies (300) further comprises two connecting frames (370), and the two clamping members (320) are respectively connected to the two connecting frames (370), wherein one clamping member (320) is mounted on one connecting frame (370), and the connecting frame (370) is slidably connected to the bracket (310); The second driving mechanism (330) comprises a second driving motor (331), a second gear set (332) and a second rotating assembly (333); the second driving motor (331) is fixedly mounted on the bracket (310); the second rotating assembly (333) is rotatably mounted on the bracket (310) and extends along a second direction; the second gear set (332) is connected between a driving shaft of the second driving motor (331) and the second rotating assembly (333); Along the second direction, the peripheral wall of the second rotating component (333) has two second external threads (334) spaced apart from each other, the connecting frame (370) has a second internal thread matching the second external thread (334), and the second external thread (334) and the second internal thread are screwed together; When the driving shaft of the second driving motor (331) rotates in different rotation directions, the second rotating assembly (333) is driven by the second gear set (332) to rotate forward or reverse around its own axis, thereby driving the two clamping members (320) on the bracket (310) to move toward or away from each other along the second direction.

7. The pipeline defect detection device according to claim 6, characterized in that: The bracket (310) has a third sliding portion (390) extending along the second direction, and the connecting frame (370) has a fourth sliding portion matching the third sliding portion (390), and the third sliding portion (390) and the fourth sliding portion are slidably matched with each other.

8. The pipeline defect detection device according to claim 7, characterized in that: The clamping member (320) comprises a hub motor (321), a wheel hub (322), and a Mecanum wheel (323); the wheel hub (322) is coaxially arranged with the output shaft of the hub motor (321) and is rotatably connected to the connecting frame (370); the Mecanum wheel (323) is sleeved on the outer periphery of the wheel hub (322); and the Mecanum wheel (323) is configured to clamp the pipeline to be inspected.

9. The pipeline defect detection device according to claim 3, characterized in that: The third driving mechanism (400) comprises a third driving motor (410), a third gear set (420), a third rotating assembly (430), and two connecting seats (440); The third driving motor (410) is fixedly mounted on the mounting seat (100), the third rotating assembly (430) is rotatably mounted on the mounting seat (100) and extends along the first direction, the third gear set (420) is connected between the driving shaft of the third driving motor (410) and the third rotating assembly (430), the two defect detection members (500) are respectively mounted on the two connecting seats (440), one defect detection member (500) is connected to one connecting seat (440), and the two connecting seats (440) are respectively slidably connected to the mounting seat (100); Along the first direction, the peripheral wall of the third rotating assembly (430) has two third external threads (431) spaced apart from each other, the connecting seat (440) has a third internal thread matching the third external thread (431), and the third external thread (431) and the third internal thread are screwed together; When the driving shaft of the third driving motor (410) rotates in different rotation directions, the third rotating assembly (430) is driven by the third gear set (420) to rotate forward or reverse around its own axis, thereby driving the two connecting seats (440) and the corresponding defect detection parts (500) to move in a direction toward or away from each other.

10. The pipeline defect detection device according to any one of claims 1 to 3, characterized in that: The defect detection component (500) is a weak magnetic sensor; The pipeline defect detection device also includes a sensor housing and a first sealing ring. The sensor housing has a first accommodating cavity. The weak magnetic sensor is arranged in the first accommodating cavity. The first sealing ring is used to seal the gap around the accommodating cavity.

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