Synchronous self-protection electromagnetic ultrasonic pipeline interior detection device

Abstract

The utility model relates to a synchronous self-protection electromagnetic ultrasonic detection device for detecting the interior of a pipeline. The utility model aims to provide the synchronous self-protection electromagnetic ultrasonic pipeline internal detection device which is simple and convenient to operate, high in adaptability, high in detection precision, high in passing ability, safe and long in service life. The utility model relates to a synchronous self-protection electromagnetic ultrasonic pipeline interior detection device which comprises a bin body, and a bin cover is arranged on the bin body. The detection assembly comprises a detection probe; the supporting assembly comprises a first supporting arm and a second supporting arm, and one end of the first supporting arm and one end of the second supporting arm are fixedly arranged on the two opposite sides of the detection probe respectively; the moving assembly comprises a first moving crank arm and a second moving crank arm, moving wheels are arranged at one ends of the first moving crank arm and the second moving crank arm, the other end of the first supporting arm is rotationally connected with the other end of the first moving crank arm, and the other end of the second supporting arm is rotationally connected with the other end of the second moving crank arm.

Description

Technical Field

[0001] This utility model relates to an electromagnetic ultrasonic testing device, and more particularly to a synchronous self-protected electromagnetic ultrasonic testing device for internal pipeline testing. Background Technology

[0002] Electromagnetic Acoustic Testing (EMAT) technology has the advantages of non-contact testing, wide testing coverage, and multi-technology driven capabilities, and is widely used in the detection of defects and health monitoring of metal structures in the petroleum, petrochemical, aerospace and other fields.

[0003] Electromagnetic ultrasonic technology is applicable to the safety inspection of oil and gas pipelines and can detect sub-millimeter defects, such as circumferential weld cracks, stress corrosion defects, and initial defects. It can avoid the application pain points of traditional magnetic flux leakage testing, such as single detection target (only able to detect a certain type of pipeline with a fixed diameter) and large driving force requirements. However, due to the limitation of permanent magnets or electromagnets in the detection system, the detection probe body has an adsorption force. Therefore, during the detection process, it is very easy to have rigid collisions with weld beads, deformation defects, and bends, which will damage the probe, affecting the accuracy of the detection and shortening the life of the detection device. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a synchronous self-protecting electromagnetic ultrasonic pipeline internal inspection device that is easy to operate, highly adaptable, has high detection accuracy, strong throughput, safety, and long service life.

[0005] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal inspection device, comprising a chamber body with a chamber cover; a detection component including a detection probe; a support component including a first support arm and a second support arm, one end of which is fixedly mounted on opposite sides of the detection probe; and a moving component including a first moving crank arm and a second moving crank arm, each with a moving wheel at one end. The first and second moving crank arms are rotatably mounted at opposite ends of the chamber body and along the extension direction of the chamber body. The other end of the first support arm is rotatably connected to the other end of the first moving crank arm, and the other end of the second support arm is rotatably connected to the other end of the second moving crank arm. The first and second moving crank arms can drive the detection probe to move synchronously with themselves along the radial direction of the pipeline.

[0006] This utility model discloses a synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device, wherein the support assembly further includes a first connecting rod and a second connecting rod, and a first fixing ring and a second fixing ring are sleeved on the chamber body. One end of the first connecting rod is rotatably connected to the first support arm, and the other end of the first connecting rod is rotatably connected to the first fixing ring. One end of the second connecting rod is rotatably connected to the second support arm, and the other end of the second connecting rod is rotatably connected to the second fixing ring.

[0007] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, wherein the support assembly further includes a support tension spring, one end of which is connected to a first support arm and the other end of which is connected to a second support arm.

[0008] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal inspection device, wherein a support flange is provided on the chamber body, the support flange includes a first flange, a second flange, a third flange and a fourth flange, the second flange and the third flange are respectively provided at opposite ends of the chamber body, the first flange and the second flange are connected by a fixing rod and are spaced apart, the third flange and the fourth flange are connected by a fixing rod and are spaced apart, and the first movable crank arm and the second movable crank arm are respectively rotatably connected to the first flange and the fourth flange.

[0009] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal inspection device. The movable component further includes a first support base and a fourth support base respectively disposed on the inner walls of a first flange and a fourth flange; a second support base and a third support base respectively disposed on the inner walls of a second flange and a fourth flange; a first rotation adjustment rod; a second rotation adjustment rod; a first elastic connecting rod; and a second elastic connecting rod. The first and second movable crank arms are rotatably connected to the first and fourth support bases, respectively. One end of the first elastic connecting rod is rotatably connected to the end of the first movable crank arm away from the moving wheel; the other end of the first elastic connecting rod is rotatably connected to the end of the first support arm away from the detection probe and one end of the first rotation adjustment rod; the other end of the first rotation adjustment rod is rotatably connected to the second support base; one end of the second elastic connecting rod is rotatably connected to the end of the second movable crank arm away from the moving wheel; the other end of the second elastic connecting rod is rotatably connected to the end of the second support arm away from the detection probe and one end of the second rotation adjustment rod; and the other end of the second rotation adjustment rod is rotatably connected to the third support base.

[0010] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, wherein multiple detection probes are provided, multiple sets of support components and moving components are provided, the chamber is cylindrical, and the multiple detection probes correspond one-to-one with the multiple sets of support components and moving components and are evenly arranged along the circumference of the chamber.

[0011] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, wherein the detection component further includes a probe housing corresponding to the detection probe, the detection probe is disposed inside the probe housing, and the first support arm and the second support arm are respectively fixedly disposed on opposite sides of the probe housing.

[0012] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, wherein the detection component further includes a battery pack and a storage module disposed within a chamber. The chamber is provided with several wiring holes along its circumference. The battery pack and the storage module are electrically connected by wires. The storage module is connected to the detection probe through excitation cables and acquisition cables, respectively.

[0013] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal inspection device, wherein the chamber body is further provided with an anti-collision mechanism, the anti-collision mechanism includes a fixed plate and an anti-collision frame, one end of the anti-collision frame is disposed on one surface of the fixed plate, and the other surface of the fixed plate is disposed on the outer wall of the first flange or the fourth flange.

[0014] This utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, wherein the anti-collision frame is equipped with a universal joint for power connection.

[0015] The difference between this invention and existing technologies lies in the following: A flange is installed on the chamber body, and two support seats are used to support and fix the movable crank arm. A fixing ring is fitted onto the chamber body, and a connecting rod is used to support the support arm. Then, through a support spring, elastic connecting rod, support seats, and a rotating adjusting rod, the movable crank arm and the support arm are securely connected, forming a detection structure in which the detection probe and the movable crank arm move synchronously. During detection, pneumatic or traction power is used to drive the detection device to move. Multiple detection probes, in conjunction with a storage module, perform high-precision electromagnetic ultrasonic testing on the pipeline.

[0016] This utility model provides a synchronous self-protecting electromagnetic ultrasonic pipeline internal inspection device, which includes at least the following beneficial effects:

[0017] (1) The detection structure in which the detection probe and the moving curved arm move synchronously can avoid collision or friction between the detection probe and the inner wall of the pipe, effectively protect the detection probe and extend its service life; ensure that the detection probe always maintains a certain distance from the inner wall of the pipe, thereby ensuring the accuracy of the detection. The height difference can be set according to the requirements; the two moving curved arms of the detection device can extend outward or retract inward on the chamber body, which can be applied to pipes of different diameters, overcoming the limitation of existing detection equipment that can only be used for pipes of fixed diameter.

[0018] (2) Two support structures are formed on the left and right sides of the silo by setting flanges, which effectively solves the problem of space shortage caused by the linkage of the moving boom and the support arm.

[0019] (3) The setting of support base, support spring and elastic connecting rod enhances the linkage between the moving curved arm and the support arm, shortens the response time of the linkage between the two, and reduces the ineffective stroke of the linkage; and increases the range of motion of the moving curved arm and the linkage space between the moving curved arm and the support arm, so that the moving curved arm has enough extension and retraction space along the radial direction of the pipeline, thereby meeting the detection requirements of pipelines with different diameters and improving the adaptability of the detection device.

[0020] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to the present invention;

[0022] Figure 2 This is a front view of a synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to this utility model;

[0023] Figure 3 This is a left view of a synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to this utility model;

[0024] Figure 4 This is a schematic diagram of the connection and cooperation between the detection probe, the moving component, and the support component in this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the compartment body in this utility model;

[0026] Figure 6 This is a front sectional view of the compartment body in this utility model.

[0027] Figure label:

[0028] 01-Bug body; 11-Support flange; 111-First flange; 112-Second flange; 113-Third flange; 114-Fourth flange; 12-Fixing rod; 13-First fixing ring; 14-Second fixing ring; 15-Cable routing hole; 16-Anti-collision mechanism; 161-Fixing plate; 162-Anti-collision frame; 163-Universal joint; 17-Bug cover; 02-Detection assembly; 21-Detection probe; 22-Probe housing; 23-Battery pack; 24-Storage module; 03-Support assembly; 31-First support arm; 32-Second support arm; 33-First connecting rod; 34-Second connecting rod; 35-Support tension spring; 04-Moving assembly; 41-First moving crank arm; 42-Second moving crank arm; 43-Moving wheel; 44-First support seat; 45-Second support seat; 46-Third support seat; 47-Fourth support seat; 48-First elastic connecting rod; 49-Second elastic connecting rod; 50-First rotation adjustment rod; 51-Second rotation adjustment rod. Detailed Implementation

[0029] like Figure 1 , 2 As shown in Figure 4, this utility model discloses a synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, comprising a chamber 01 with a chamber cover 17; a detection component 02 including a detection probe 21; a support component 03 including a first support arm 31 and a second support arm 32, one end of which is fixedly disposed on opposite sides of the detection probe 21; and a moving component 04 including a first moving arm 41 and a second moving arm 42, each with a moving wheel 43 at one end. The first moving arm 41 and the second moving arm 42 are rotatably disposed at opposite ends of the chamber 01 and along the extension direction of the chamber 01. The other end of the first support arm 31 is rotatably connected to the other end of the first moving arm 41, and the other end of the second support arm 32 is rotatably connected to the other end of the second moving arm 42. The first moving arm 41 and the second moving arm 42 can drive the detection probe 21 to move synchronously with themselves along the radial direction of the pipeline.

[0030] The chamber 01 serves as the supporting structure for the detection device and is used to connect with other components. The detection probe 21 is used to detect defects such as cracks, corrosion, and deformation on the inner wall of the pipe. The upper ends of the first support arm 31 and the second support arm 32 are fixedly connected to the left and right side walls of the detection probe 21 by bolts, thereby firmly fixing the detection probe 21 and ensuring that the detection probe 21 always faces the inner wall of the pipe, which facilitates the detection of the pipe.

[0031] Both the first movable crank arm 41 and the second movable crank arm 42 are L-shaped crank arms. The curved parts of the two crank arms are rotatably connected to the left and right ends of the chamber body 01, respectively. The upper ends of the first movable crank arm 41 and the second movable crank arm 42 are provided with movable wheels 43. The movable wheels 43 abut against the inner wall of the pipe to drive the detection device to move. The lower ends of the first movable crank arm 41 and the second movable crank arm 42 are rotatably connected to the lower ends of the first support arm 31 and the second support arm 32, respectively. The first support arm 31 and the second support arm 32 can be either support arms or L-shaped crank arms. L-shaped crank arms are preferred, as they are beneficial to enhance the cooperation and connection effect between the support arm and the movable crank arm. In this way, the chamber body 01 cooperates and connects with the support component 03, the movable component 04 and the detection probe 21 to form a linkage system of "moving wheel 43-crank arm-support arm-probe". This enables the detection probe 21 to move synchronously along the radial direction of the pipe with the movable crank arm. That is, the first movable crank arm 41 and the second movable crank arm 42 can drive the detection probe 21 to move synchronously along the radial direction of the pipe with the movement of the first movable crank arm 41 and the second movable crank arm 42.

[0032] The height of the detection probe 21 is always lower than that of the moving wheel 43. This design has several advantages. First, it avoids collisions or friction between the detection probe 21 and the inner wall of the pipe, effectively protecting the detection probe 21 and extending its service life. Second, it ensures that the detection probe 21 always maintains a certain distance from the inner wall of the pipe, thereby ensuring the accuracy of the detection. The height difference can be set according to requirements. Third, the two moving curved arms of the detection device can extend outward or retract inward on the chamber 01, which can be applied to pipes of different diameters. This overcomes the limitation of existing detection equipment that can only be used on pipes of fixed diameters. It also enables the operation of pipes with prominent deformation defects, severe weld beads, and high requirements for the passage of bends, ensuring the stability and passability of the detection, improving the safety and adaptability of the detection probe 21, and reducing repair and operating costs.

[0033] In use, the detection device is placed into the pipeline and propelled forward by a robot or high-pressure gas. When the pipe diameter changes, the first and second moving arms 41 and 42 rotate radially along the pipeline on the chamber 01. When the pipe diameter increases, the two moving arms extend outward, simultaneously extending the two support arms outward. When the pipe diameter decreases, the two moving arms retract inward, simultaneously retracting the two support arms inward. This ensures that during movement, the moving wheels 43 remain against the inner wall of the pipeline, and the detection probe 21 maintains a certain detection distance from the inner wall. After the detection is complete, the detection device can be removed from the pipeline.

[0034] It should be noted that the outward extension mentioned above and below refers to extending away from the central axis of the pipe, while the inward contraction refers to contraction towards the central axis of the pipe.

[0035] like Figure 2 , 4 As shown, the support assembly 03 also includes a first connecting rod 33 and a second connecting rod 34. A first fixing ring 13 and a second fixing ring 14 are fitted onto the housing 01. One end of the first connecting rod 33 is rotatably connected to the first support arm 31, and the other end is rotatably connected to the first fixing ring 13. One end of the second connecting rod 34 is rotatably connected to the second support arm 32, and the other end is rotatably connected to the second fixing ring 14. The support assembly 03 also includes a support tension spring 35, one end of which is connected to the first support arm 31, and the other end is connected to the second support arm 32.

[0036] In actual testing, the length or diameter of the pipes to be tested varies. When encountering long pipes, the testing device needs to operate continuously inside the pipe. This requires the testing device to have extremely high stability and testing accuracy to prevent it from malfunctioning and affecting testing efficiency while operating inside the pipe.

[0037] Based on this, a first fixing ring 13 and a second fixing ring 14 are fitted in the middle of the hopper body 01. These two fixing rings are firmly connected to the hopper body 01 by welding or bolts. The two ends of the first connecting rod 33 are respectively rotatably connected to the bent part of the first support arm 31 and the first fixing ring 13 by locking pins. Similarly, the two ends of the second connecting rod 34 are also rotatably connected to the bent part of the second support arm 32 and the second fixing ring 14 by locking pins. In this way, the first support arm 31 is supported by the first connecting rod 33 and the first fixing ring 13, and the second support arm 32 is supported by the second connecting rod 34 and the second fixing ring 14. At the same time, the elastic force of the support tension spring 35 is used to tighten the two support arms. This design ensures, on the one hand, that the two support arms will not fall due to their own weight and the weight of the detection probe 21, thus avoiding the two movable curved arms from contracting inward due to falling and affecting the detection accuracy, ensuring that the movable wheel 43 can always be pressed against the inner wall of the pipe, and that the detection probe 21 always maintains a certain detection distance from the inner wall of the pipe; on the other hand, it enhances the linkage between the movable curved arm and the support arm, shortens the response time of their linkage, and reduces the ineffective stroke of the linkage.

[0038] During the testing process, the testing device is placed in the pipe. At this time, the support spring 35 is in a stretched state. When the pipe diameter increases, the support spring 35 contracts under the action of elasticity. At the same time, the first support arm 31 and the second support arm 32 rotate and extend outward, driving the first connecting rod 33 and the second connecting rod 34 to rotate, thereby driving the testing probe 21 to extend outward synchronously along the radial direction of the pipe.

[0039] When the pipe diameter decreases, the first support arm 31 and the second support arm 32 rotate and retract inward, driving the first connecting rod 33 and the second connecting rod 34 to rotate, and driving the detection probe 21 to retract inward synchronously along the radial direction of the pipe. The support spring 35 is stretched as the two support arms retract inward.

[0040] like Figure 1 , 2 As shown, a support flange 11 is provided on the hopper body 01. The support flange 11 includes a first flange 111, a second flange 112, a third flange 113, and a fourth flange 114. The second flange 112 and the third flange 113 are respectively provided at opposite ends of the hopper body 01. The first flange 111 and the second flange 112 are connected by a fixing rod 12 and are spaced apart. The third flange 113 and the fourth flange 114 are connected by a fixing rod 12 and are spaced apart. The first movable crank arm 41 and the second movable crank arm 42 are rotatably connected to the first flange 111 and the fourth flange 114, respectively.

[0041] The support flange 11 is bolted to the hopper body 01 to achieve a mating connection with other components. Specifically, the second flange 112 and the third flange 113 are bolted to the left and right side walls of the hopper body 01, respectively. The four flanges have identical structures, each with multiple circumferentially distributed through holes on its surface. The number of fixing rods 12 is equal to the number of through holes on each flange. Each fixing rod 12 has threads at both ends. Multiple fixing rods 12 are inserted into the corresponding through holes of the first flange 111 and the second flange 112, and secured with nuts, thus fixing the first flange 111 and the second flange 112 at intervals. Similarly, the fourth flange 114 is also fixed to the third flange 113 at intervals using multiple fixing rods 12. This arrangement forms two support structures on the left and right sides of the hopper body 01, effectively solving the space constraints caused by the linkage between the moving boom and the support arm.

[0042] In addition, the flange is provided with a through groove opened in the radial direction. The through grooves on the second flange 112 and the third flange 113 can not only ensure the range of motion of the first support arm 31 and the second support arm 32, realize the extension and retraction of the support arm in the radial direction of the pipeline, but also play a limiting role for the support arm.

[0043] During the inspection, the movable crank arm extends or retracts radially along the pipe according to the changes in pipe diameter (e.g., cracks, weld beads, pits, etc.). Since the first support arm 31 and the second support arm 32 are located in the through grooves on the second flange 112 and the third flange 113 respectively, the support arms will extend or retract synchronously in the through grooves along with the movable crank arm.

[0044] like Figure 1 , 2As shown in Figure 4, the movable assembly 04 also includes a first support seat 44 and a fourth support seat 47 respectively disposed on the inner walls of the first flange 111 and the fourth flange 114, a second support seat 45 and a third support seat 46 respectively disposed on the inner walls of the second flange 112 and the fourth flange 114, a first rotation adjusting rod 50, a second rotation adjusting rod 51, a first elastic connecting rod 48 and a second elastic connecting rod 49, a first movable crank arm 41 and a second movable crank arm 42 respectively rotatably connected to the first support seat 44 and the fourth support seat 47, and one end of the first elastic connecting rod 48 is away from the first movable crank arm 41. One end of the movable wheel 43 is rotatably connected, the other end of the first elastic link 48 is rotatably connected to the end of the first support arm 31 away from the detection probe 21 and one end of the first rotation adjustment rod 50, the other end of the first rotation adjustment rod 50 is rotatably connected to the second support seat 45, one end of the second elastic link 49 is rotatably connected to the end of the second movable crank arm 42 away from the movable wheel 43, the other end of the second elastic link 49 is rotatably connected to the end of the second support arm 32 away from the detection probe 21 and the end of the second rotation adjustment rod 51, and the other end of the second rotation adjustment rod 51 is rotatably connected to the third support seat 46.

[0045] The first support base 44 and the fourth support base 47 are respectively bolted to the inner walls of the first flange 111 and the fourth flange 114. The first movable crank arm 41 and the second movable crank arm 42 are rotatably connected to the first support base 44 and the fourth support base 47 respectively by locking pins. The left and right ends of the first elastic connecting rod 48 are rotatably connected to the lower ends of the first movable crank arm 41 and the first support arm 31 respectively by locking pins. Similarly, the left and right ends of the second elastic connecting rod 49 are also rotatably connected to the lower ends of the second support arm 32 and the second movable crank arm 42 respectively by locking pins. This configuration has multiple advantages. First, since a strong spring is provided in the middle of the elastic connecting rod, its elastic characteristics enhance the linkage between the movable crank arm and the support arm. Combined with the support tension spring 35, the response time of the linkage between the two can be further shortened, and the ineffective stroke of the linkage can be reduced. Second, it can increase the range of motion of the movable crank arm and the linkage space between the movable crank arm and the support arm, so that the movable crank arm has sufficient extension and contraction space along the radial direction of the pipeline, thereby meeting the detection requirements of pipelines with different diameters and improving the adaptability of the detection device.

[0046] It should be specifically noted that the two opposite sidewalls of the first flange 111 and the second flange 112 are their inner walls, and the two opposite sidewalls of the first flange 111 and the second flange 112 are their outer walls. Similarly, the two opposite sidewalls of the third flange 113 and the fourth flange 114 are their inner walls, and the two opposite sidewalls of the third flange 113 and the fourth flange 114 are their outer walls.

[0047] The second support 45 and the third support 46 are respectively bolted to the inner walls of the second flange 112 and the third flange 113, and are positioned at the through groove. The upper and lower ends of the first rotating adjustment rod 50 are rotatably connected to the second support 45 and the right end of the first elastic connecting rod 48 respectively through pins. Similarly, the upper and lower ends of the second rotating adjustment rod 51 are also rotatably connected to the third support 46 and the left end of the second elastic connecting rod 49 respectively through pins. With the help of the second support 45, the third support 46, the first rotating adjustment rod 50 and the second rotating adjustment rod 51, the stability of the movement of the curved arm and the support arm can be further enhanced, ensuring that the detection probe 21 always moves radially along the pipeline with the moving curved arm and will not deviate, thereby ensuring the accuracy of the detection device.

[0048] During the testing process, as the pipe diameter decreases, when the moving crank arm retracts inward along the pipe diameter direction, it will drive the elastic connecting rod to move. At this time, the elastic connecting rod is in a stretched state, and under its elastic force, it pulls the support arm to move. When the support arm moves, it retracts synchronously with the moving crank arm along the pipe diameter direction under the support of the connecting rod. At this time, the support tension spring 35 is in a stretched state.

[0049] As the pipe diameter increases, the tension spring 35, under tension, contracts under its elastic force, pulling the two support arms closer together. As the two support arms approach, they extend outwards along the pipe diameter direction under the support of the connecting rod. This outward extension of the support arms pulls the elastic connecting rod, which in turn pulls the moving crank arm to extend outwards along the pipe diameter direction. Simultaneously, the tensioned elastic connecting rod also contracts under its elastic force, pulling the moving crank arm to move. Thus, under the combined elastic force of the tension spring 35 and the elastic connecting rod, the moving crank arm and the support arms extend outwards synchronously along the pipe diameter direction.

[0050] like Figure 1 , 2 As shown, there are multiple detection probes 21, multiple sets of support components 03 and moving components 04, and the chamber body 01 is cylindrical. The multiple detection probes 21 correspond one-to-one with the multiple sets of support components 03 and moving components 04 and are evenly arranged along the circumference of the chamber body 01.

[0051] Multiple detection probes 21 are provided, and the number of support components 03 and moving components 04 is the same as that of detection probes 21 (i.e., one-to-one correspondence). In addition, the number of through grooves on the second flange 112 and the third flange 113 is also the same as that of detection probes 21. This forms a detection device architecture that can detect pipelines from all directions, thereby ensuring the accuracy and stability of the detection.

[0052] like Figure 1As shown, the detection assembly 02 also includes a probe housing 22 corresponding to the detection probe 21. The detection probe 21 is disposed inside the probe housing 22, and the first support arm 31 and the second support arm 32 are respectively fixedly disposed on opposite sides of the probe housing 22.

[0053] Each detection probe 21 is securely installed inside the probe housing 22. Two support arms are fixed to the left and right side walls of the probe housing 22 by bolts. A detection window is provided on the top surface of the probe housing 22 (i.e., the side facing the inner wall of the pipe). The detection probe 21 inspects the pipe through the detection window. The probe housing 22 has a conical design. By reducing the top area of ​​the probe housing 22, it prevents the probe housing 22 from bumping or rubbing against protrusions such as weld beads on the inner wall of the pipe, thus effectively protecting the detection probe 21. This ensures the detection accuracy of the detection probe 21 and extends its service life.

[0054] To further protect the detection probe 21, a roller can be installed on the top of the probe housing 22. When encountering protrusions such as weld beads, the roller will roll over the protrusions to prevent direct contact between the probe housing 22 and the protrusions.

[0055] like Figure 1 , 5 As shown in Figure 6, the detection component 02 also includes a battery pack 23 and a storage module 24 disposed in the chamber 01. The chamber 01 is provided with several wiring holes 15 along the circumference. The battery pack 23 and the storage module 24 are electrically connected by wires. The storage module 24 is connected to the detection probe 21 by excitation cable and acquisition cable, respectively.

[0056] Battery pack 23 is used to power storage module 24 and detection probe 21, and the specific connection is as follows:

[0057] Battery pack 23 is connected to the power supply interface of storage module 24 via wires, providing power to storage module 24. The excitation interface of storage module 24 is connected to the excitation cable on detection probe 21. Storage module 24 not only excites detection probe 21 via the excitation cable but also supplies power to detection probe 21. The acquisition interface of storage module 24 is connected to the acquisition cable on detection probe 21. Both the excitation cable and the acquisition cable are connected to storage module 24 via wiring holes 15 on the housing 01.

[0058] In addition to the internal power supply detection method described above, to meet the requirements of continuous detection, this detection device can also perform external power supply detection via cable, as detailed below:

[0059] Both sides of the container body 01 are equipped with container covers 17. Cables are introduced into the container body 01 through the airtight connector of the container cover 17. The airtight connector is then electrically connected to the power supply interface of the storage module 24 through the wire to supply power to the storage module 24 and the detection probe 21. Alternatively, the airtight connector is connected to the charging interface of the battery pack 23 through the wire to charge it.

[0060] The electromagnetic detection principle of this detection device is as follows:

[0061] The detection device is placed inside the pipeline and moved by a traction power unit such as a robot or by the pipeline pressure difference. During the movement of the detection device, the detection probe 21, under the excitation of the storage module 24, generates an alternating magnetic field around the probe. Under the action of the bias magnetic field and the dynamic magnetic field, a skin current is generated near the surface of the pipeline. The alternating skin current generates particle vibration under the action of the bias magnetic field, thereby generating stress waves. When there are corrosion defects on the inner and outer pipe walls, due to ultrasonic impedance and other reasons, an echo signal containing defect information will be generated. This affects the distribution and magnitude of the skin current, thereby causing distortion of the surrounding magnetic field through electromagnetic inverse effect. The detection probe 21 captures the changes in the magnetic field and generates a voltage signal. The voltage signal is acquired and stored in parallel by the storage module 24. After the detection is completed, the upper computer software can analyze the characteristic information of the signal, and the location of the defect can be determined by combining it with the mileage information.

[0062] This patent mainly provides a synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device for the safe operation and maintenance of oil and gas pipelines. The core of its detection principle is the coupling mechanism of electromagnetic induction and ultrasonic waves: a skin current is formed in the near-surface of the inner wall of the pipeline through a high-frequency alternating electromagnetic field, and Lorentz force and magnetostriction are generated under the action of a static bias magnetic field, generating stress ultrasonic waves based on structural strain; the receiving end converts the magnetic field signal into a voltage signal through the inverse effect of the ultrasonic echo, and collects and stores it.

[0063] like Figure 1 , 2 As shown in Figure 3, the hopper body 01 is also provided with an anti-collision mechanism 16. The anti-collision mechanism 16 includes a fixed plate 161 and an anti-collision frame 162. One end of the anti-collision frame 162 is disposed on one surface of the fixed plate 161, and the other surface of the fixed plate 161 is disposed on the outer wall of the first flange 111 or the fourth flange 114.

[0064] The anti-collision bracket 162 is a conical structure formed by multiple anti-collision bars. Its blunt end is welded to one surface of the fixed plate 161, and its pointed end extends outward. The middle is hollowed out to facilitate the insertion of cables in the external power supply detection mode. The other surface of the fixed plate 161 is attached to the outer wall of the first flange 111 or the fourth flange 114 and is firmly fixed with bolts. The diameter of the fixed plate 161 is the same as or slightly smaller than that of the flange. The anti-collision mechanism 16 protects the detection device.

[0065] To enhance the protective effect, an anti-collision mechanism 16 can be installed on the first flange 111 and the fourth flange 114. During the inspection process, the anti-collision mechanism 16 can not only prevent the flange from colliding with the protrusions inside the pipe, but also allow the inspection device to be moved by the anti-collision frame 162.

[0066] Furthermore, this detection device can move bidirectionally, meaning it can perform back-and-forth inspections within the pipeline without requiring a change in orientation, thus improving inspection efficiency. During the back-and-forth inspection process, the dual anti-collision mechanism 16 further enhances the safety of the detection device.

[0067] When using high-pressure gas as the driving force to drive the detection device, in order to enhance the driving effect, a leather cup can be installed on each of the first flange 111 and the fourth flange 114. The leather cup improves the airtightness between the detection device and the pipeline, and the pressure difference drives the detection device to move stably in the pipeline, thereby ensuring the stability of the detection.

[0068] like Figure 1 , 2 As shown, the crash barrier 162 is equipped with a universal joint 163 for power connection.

[0069] Each of the two anti-collision mechanisms 16 has a universal joint 163 at its tip on the anti-collision frame 162. When the detection device is in external power supply detection mode, the universal joint 163 facilitates a secure connection with the robot or other traction power source. During the detection process, if protrusions such as weld beads or pits are encountered, a radial displacement difference will occur between the detection device and the robot. The presence of the universal joint 163 ensures that the two automatically adjust their positions during bumpy conditions, thereby improving the stability of the detection device.

[0070] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0071] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0072] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A synchronous self-protected electromagnetic ultrasonic pipeline internal detection device, characterized in that: The device includes a housing with a housing cover; a detection assembly including a detection probe; a support assembly including a first support arm and a second support arm, one end of which is fixedly mounted on opposite sides of the detection probe; and a movement assembly including a first moving crank arm and a second moving crank arm, each with a moving wheel at one end. The first and second moving crank arms are rotatably mounted at opposite ends of the housing and along the extension direction of the housing. The other end of the first support arm is rotatably connected to the other end of the first moving crank arm, and the other end of the second support arm is rotatably connected to the other end of the second moving crank arm. The first and second moving crank arms can drive the detection probe to move synchronously with themselves along the radial direction of the pipeline.

2. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 1, characterized in that: The support assembly further includes a first connecting rod and a second connecting rod. A first fixing ring and a second fixing ring are fitted on the chamber body. One end of the first connecting rod is rotatably connected to the first support arm, and the other end of the first connecting rod is rotatably connected to the first fixing ring. One end of the second connecting rod is rotatably connected to the second support arm, and the other end of the second connecting rod is rotatably connected to the second fixing ring.

3. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 2, characterized in that: The support assembly also includes a support spring, one end of which is connected to the first support arm and the other end of which is connected to the second support arm.

4. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 1, characterized in that: The hopper body is provided with a support flange, which includes a first flange, a second flange, a third flange and a fourth flange. The second flange and the third flange are respectively located at opposite ends of the hopper body. The first flange and the second flange are connected by a fixing rod and are spaced apart. The third flange and the fourth flange are connected by a fixing rod and are spaced apart. The first movable crank arm and the second movable crank arm are respectively rotatably connected to the first flange and the fourth flange.

5. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 4, characterized in that: The moving assembly further includes a first support base and a fourth support base respectively disposed on the inner walls of the first flange and the fourth flange, a second support base and a third support base respectively disposed on the inner walls of the second flange and the fourth flange, a first rotation adjusting rod, a second rotation adjusting rod, a first elastic connecting rod and a second elastic connecting rod. The first moving crank arm and the second moving crank arm are respectively rotatably connected to the first support base and the fourth support base. One end of the first elastic connecting rod is rotatably connected to the end of the first moving crank arm away from the moving wheel, and the other end of the first elastic connecting rod is rotatably connected to the end of the first support arm away from the detection probe and one end of the first rotation adjusting rod. The other end of the first rotation adjusting rod is rotatably connected to the second support base. One end of the second elastic connecting rod is rotatably connected to the end of the second moving crank arm away from the moving wheel, and the other end of the second elastic connecting rod is rotatably connected to the end of the second support arm away from the detection probe and the end of the second rotation adjusting rod. The other end of the second rotation adjusting rod is rotatably connected to the third support base.

6. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 5, characterized in that: The detection probe is provided in multiple sets, the support component and the moving component are provided in multiple sets, the chamber body is cylindrical, and the multiple detection probes correspond one-to-one with the multiple sets of support components and moving components and are evenly arranged along the circumference of the chamber body.

7. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 6, characterized in that: The detection assembly also includes a probe housing corresponding to each detection probe. The detection probe is disposed inside the probe housing, and the first support arm and the second support arm are respectively fixedly disposed on opposite sides of the probe housing.

8. The synchronous self-protected electromagnetic ultrasonic pipeline internal detection device according to claim 7, characterized in that: The detection component also includes a battery pack and a storage module disposed within the chamber. The chamber has several wiring holes arranged circumferentially. The battery pack and the storage module are electrically connected by wires. The storage module is connected to the detection probe by excitation cables and acquisition cables, respectively.

9. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 8, characterized in that: The container body is also equipped with an anti-collision mechanism, which includes a fixed plate and an anti-collision frame. One end of the anti-collision frame is disposed on one surface of the fixed plate, and the other surface of the fixed plate is disposed on the outer wall of the first flange or the fourth flange.

10. The synchronous self-protecting electromagnetic ultrasonic pipeline internal detection device according to claim 9, characterized in that: The crash barrier is equipped with a universal joint for power connection.

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