An open-loop pipeline ultrasonic detection device

Abstract

The present invention discloses an open-loop pipeline ultrasonic detection device, which includes an embracing mechanism, which includes a support base and embracing arms symmetrically arranged on both sides of the support base, the embracing arms including a first connecting frame hinged on the support base and a rear embracing member fixedly connected to the support base, the two first connecting frames are both transmission-connected to a locking mechanism, a front embracing member is hinged on the rear embracing member, and the front embracing member is hinged to the first connecting frame through a first connecting rod; the front ends of the two front embracing members are both provided with knurled wheels with bearings, one of the first connecting frames is provided with an active rubber-coated wheel, which is transmission-connected to a motor assembly, and the other first connecting frame is provided with a driven rubber-coated wheel and an encoder assembly; an adjustment mechanism is provided at one end of the support base, and an ultrasonic probe is provided on the adjustment mechanism; the structural design of this scheme is reasonable, the operation is convenient, the degree of automation is high, and high-precision circumferential scanning of the pipeline can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline detection, and in particular to an open-loop pipeline ultrasonic detection device. Background Art

[0002] Pipelines, as essential equipment for transporting fluids, are widely used in industries like petroleum and chemical engineering, resulting in a large number of pipelines in service. However, potential manufacturing defects and the effects of fluid erosion, environmental corrosion, and external forces during service can easily lead to complex and diverse failures, resulting in severe economic losses and even serious safety accidents. Accidents can be avoided if the problem is identified early and appropriate measures are taken. Pipeline failures can occur in various forms, including localized corrosion, overall corrosion, large-scale damage corrosion, sulfide stress corrosion, stress corrosion cracking, and mechanical damage. Currently, many pipelines in my country are experiencing fatigue and frequent accidents. Therefore, timely inspection of in-service pipelines and subsequent repair or replacement of defective pipelines are of great significance.

[0003] At present, in the field of non-destructive testing, the main methods of pipeline inspection include manual scanning, fixed tooling, manual scanning devices and automatic scanning devices.

[0004] 1. Manual scanning mainly involves operators using handheld detection instruments to detect defects along a certain path on the pipeline surface. This method is widely used, but has low detection efficiency and accuracy and places high technical requirements on the operator.

[0005] 2. Using fixed tooling to detect pipelines has reliable installation and accurate detection, but one installation can only detect a single point and cannot achieve a full-circle scan. The cumbersome installation makes the detection efficiency very low.

[0006] 3. Manual scanning devices include magnetic, chain, and track-type scanning devices. For example, patent publication number CN216669844U, titled "Magnetic Wheel Driven Crawling Ultrasonic Scanner," utilizes a powerful magnetic wheel to attach the scanner to the outer surface of the pipe and then propel it around the pipe for inspection. This device features a compact structure, easy operation, and high detection accuracy. However, the strong adsorption force makes it difficult to disassemble, and this method limits the materials that can be inspected. Furthermore, manual movement of the device is required during scanning.

[0007] For example, the patent with publication number CN210716987U and titled "A Chain Scanner" uses a chain structure to form a ring around the pipe and hold it tightly to the pipe surface. It is suitable for pipes of any material and is not restricted by the pipe material. However, the operator needs to manually rotate the scanner for circumferential scanning, and the disassembly and assembly of this chain structure is cumbersome.

[0008] For example, the patent with publication number CN115575513U and name "An Ultrasonic Guided Wave Scanning Device" has a first fixing frame and a second fixing frame that are tightly matched through slots, blocks, curved tracks, connecting blocks, and limiting mechanisms, so that the device can be fixed on the outside of the pipe. The guided wave probe can also move along the curved track and has a certain adaptability to pipes of different diameters. However, the structure of the device is loose before installation, and multiple components are involved during installation. The process is relatively cumbersome and very inconvenient, and the guided wave probe needs to be moved manually during scanning.

[0009] For example, patent document CN216560407U discloses an automatic ultrasonic pipeline scanning device. This device is mounted on the pipeline through a clamping bolt passing through a support ring. A rolling wheel driven by a motor engages with the teeth on the fixed ring to achieve automatic circumferential scanning. The speed, path, and distance can be precisely controlled while improving efficiency and saving manpower. However, the device is cumbersome to disassemble and assemble, and is time-consuming and labor-intensive. In addition, the centering is easily affected by the installation, making adjustment difficult. Summary of the Invention

[0010] In view of the above-mentioned deficiencies in the prior art, the present invention provides an open-loop pipeline ultrasonic detection device, which solves the problems of low automation level, complicated assembly and disassembly operations, and manual adjustment of the detection station in the prior art pipeline scanning devices.

[0011] To achieve the above object, the technical solution adopted by the present invention is:

[0012] The cam is connected to the first support frame and the second support frame is connected with the camshaft by the spring, and the camshaft is connected with the first support frame by the spring.

[0013] Furthermore, the locking mechanism includes a screw rod, the screw rod has a square screw nut on the thread, the bottom of the square screw nut abuts against the pressure block, and the middle of the pressure block is provided with an avoidance hole for passing the screw rod. The square screw nut and the two side surfaces of the pressure block are slidably fitted with the inner side surface of the support seat, and the other two sides of the pressure block are respectively connected to the two connecting supports through the second connecting rod, and the two ends of the second connecting rod are respectively hinged to the pressure block and the connecting support, and the two connecting supports are respectively fixedly connected to the two first connecting frames.

[0014] Furthermore, a rebound shock absorber is provided between the first connecting frame and the support seat, and long supports are hinged at both ends of the rebound shock absorber, and the two long supports are fixedly connected to the first connecting frame and the support seat respectively.

[0015] Furthermore, both ends of the screw rod are fixed by flange bearings, and one end of the screw rod protrudes from the support seat and is hinged with a screw handle.

[0016] Furthermore, the adjustment mechanism includes a support block, and the top and bottom of the support block are respectively provided with a toothed upper sheet metal and a toothed lower sheet metal, and both sides of the toothed upper sheet metal and the toothed lower sheet metal are provided with limit racks, and the two limit racks on the toothed upper sheet metal and the toothed lower sheet metal on the same side are arranged facing each other, and U-shaped sliders are slidably provided on both sides of the support block, and a sheet metal piece is provided on the U-shaped slider, and a sliding sleeve is provided on the sheet metal piece, and a limiting ring is provided on the sliding sleeve that abuts against the inner side surface of the sheet metal piece. A toothed fastener is provided on the sliding sleeve located on the outer side of the sheet metal piece. A gap is set between the toothed fastener and the sheet metal piece, and the toothed fastener is engaged with the limiting rack. A sliding groove is provided on the support block. The inner ends of the two sliding sleeves are slidably connected through a guide rod, and a second compression spring is provided between the two sliding sleeves. A pressing piece is provided on the outer ends of the two sliding sleeves. A guide block is provided at the end of the U-shaped slider. A radial telescopic mechanism is provided on the guide block, and the ultrasonic probe is provided on the radial telescopic mechanism.

[0017] Furthermore, the radial telescopic mechanism includes a copper column parallel to the radial direction of the pipe, the copper column is movably arranged on the guide block, a U-shaped guide sheet metal is slidably provided on the guide block, the guide sheet metal is fixedly connected to the outer end of the copper column, a gasket is provided on the inner end of the copper column, and a first compression spring is provided on the copper column located between the guide block and the gasket, and the ultrasonic probe is arranged on the inner end of the copper column.

[0018] Furthermore, a fisheye bearing is provided at the inner end of the copper column, the rotating surface of the fisheye bearing is parallel to the radial direction of the pipe, and the fisheye bearing is connected to the ultrasonic probe through a probe mounting piece.

[0019] Furthermore, the encoder assembly includes a second connecting frame arranged on the first connecting frame, a flange seat is provided on the second connecting frame, a driven rubber-coated wheel is provided at one end of the flange seat, a graphite copper sleeve is provided at the other end of the flange seat, a mounting bracket is provided on the graphite copper sleeve, and one end of the mounting bracket is rotatably arranged on the end of the graphite copper sleeve, an encoder is provided at the other end of the mounting bracket, a metal knurled wheel is provided on the rotating shaft of the encoder, and one end of the mounting bracket on which the encoder is provided is connected to the flange seat through a tension spring.

[0020] Furthermore, the motor assembly includes a motor that is transmission-connected to the active rubber-coated wheel. The motor is sealed by an upper waterproof shell and a lower waterproof shell. The upper waterproof shell and the lower waterproof shell are buckled with each other, and sealant is coated on the buckled contact surfaces.

[0021] The beneficial effects of the present invention are:

[0022] 1. This solution adopts an embracing tooling with novel design, compact structure, and very convenient assembly and disassembly. It can adapt to pipes of different diameters and is not restricted by pipe materials when used. Through the rolling cooperation of the active rubber-coated wheel, the driven rubber-coated wheel and the two knurled wheels with bearings and the outer wall of the pipe, this solution can rotate in the circumferential direction of the pipe. In combination with the ultrasonic probe, it can achieve high-precision circumferential scanning of the pipe.

[0023] 2. The clasping arms of the clasping mechanism are arranged symmetrically, and the front clasping member can be driven to rotate through the first connecting rod, so that the diameter of the ring body formed by the two knurled wheels with bearings and the active rubber-coated wheel and the driven rubber-coated wheel can be adaptively adjusted to adapt to pipes of different diameters.

[0024] 3. The installation of the clutch mechanism on the pipe mainly relies on the clamping force provided by the locking mechanism, so that the active rubber-coated wheel, the driven rubber-coated wheel and the two knurled wheels with bearings are pressed against the outer wall of the pipe. The locking mechanism rotates the screw to make the square screw nut move axially and squeeze the pressure block at its bottom. The pressure block can drive the first connecting frame to rotate through the second connecting rod and the connecting support, and the first connecting frame can drive the two front parts to rotate in opposite directions through the first connecting rod, so that the knurled wheel with bearings at the front end of the front part is tightly attached to the pipe and locked, and finally the clutch mechanism is firmly clamped on the pipe.

[0025] 4. The rebound shock absorber is used to reset the clutch mechanism and makes the entire clutch mechanism compact and flexible. When this solution needs to be removed from the pipeline, the pressure on the pressure block is eliminated by rotating the screw in the opposite direction. Under the action of the tension of the rebound shock absorber, the first connecting frame rotates and resets, and the two front clutch parts rotate in opposite directions, so that the knurled wheel with bearing is automatically separated from the pipeline. It is easy to operate and convenient to disassemble and assemble.

[0026] 5. This solution can adjust the axial position of the ultrasonic probe in the pipeline through the adjustment mechanism. When the ultrasonic probe needs to be adjusted, the pressing piece is pressed to compress the second compression spring, and the sliding sleeves at both ends move inward, so that the toothed engagement part disengages from the limiting rack, and then the U-shaped slider is slid. When the ultrasonic probe is adjusted to the appropriate position, the pressing piece is released. Under the action of the second compression spring, the sliding sleeve automatically resets and the toothed engagement part automatically engages with the limiting rack, finally realizing the axial position adjustment and fixation of the ultrasonic probe.

[0027] 6. This solution uses a radial telescopic mechanism to achieve adaptive adjustment of the ultrasonic probe in the radial direction of the pipe. The tension of the first compression spring can be used to press the ultrasonic probe against the outer wall of the pipe. At the same time, a fisheye bearing is provided to enable the ultrasonic probe to adaptively rotate, so that the ultrasonic probe and the pipe can fit tightly.

[0028] 7. The encoder component of this solution is used to record the position and movement distance of the clutch mechanism for accurate positioning, providing scanning position information for the ultrasonic flaw detector. Combined with the signal detected by the ultrasonic probe, the specific location of the pipeline defect can be found.

[0029] 8. The motor assembly of this solution is the braking part of the clutch mechanism, which is used to drive the clutch mechanism to rotate automatically to achieve circumferential scanning of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the open-loop pipeline ultrasonic detection device of this scheme.

[0031] Figure 2 This is a first structural diagram of the scanning mechanism and the pipeline.

[0032] Figure 3 This is a second structural diagram of the scanning mechanism and the pipeline.

[0033] Figure 4 Schematic diagram of the first structure of the scanning mechanism.

[0034] Figure 5 Schematic diagram of the second structure of the scanning mechanism.

[0035] Figure 6 It is a structural diagram of the clutching mechanism.

[0036] Figure 7 This is a structural diagram of the clutching mechanism when it is clutching.

[0037] Figure 8 It is a structural diagram of the coupling mechanism and the large-diameter pipe.

[0038] Figure 9 It is a structural diagram of the coupling mechanism and the small-diameter pipe.

[0039] Figure 10 It is a structural diagram of the locking mechanism.

[0040] Figure 11 Schematic diagram of the structure of the adjustment mechanism.

[0041] Figure 12 A cross-sectional view of the adjustment mechanism.

[0042] Figure 13 It is a structural diagram of the local components of the regulating mechanism.

[0043] Figure 14 for Figure 13 Schematic diagram of the structure when the pressing piece is removed.

[0044] Figure 15 Schematic diagram of the structure of the support block.

[0045] Figure 16 It is a side sectional view of the adjustment mechanism.

[0046] Figure 17 This is a structural diagram of the regulating mechanism during adjustment.

[0047] Figure 18 This is a structural diagram of the encoder component.

[0048] Figure 19 A schematic diagram of the motor assembly.

[0049] Figure 20 This is a structural diagram of the control box.

[0050] Figure 21 This is a schematic diagram of the structure inside the control box.

[0051] Figure 22 This is the logic block diagram of the motor closed-loop control.

[0052] Among them, 1. pipeline, 2. scanning mechanism, 3. control box, 4. ultrasonic flaw detector; 21. clutch mechanism, 22. locking mechanism, 23. motor assembly, 24. encoder assembly, 25. adjustment mechanism; 2101. roller pulley with bearing, 2102. front joint, 2103. rear joint, 2104. first connecting rod, 2105. parent and child nails, 2106. first short support, 2107. first connecting frame, 2108. first long support, 2109. rebound shock absorber, 2110. second long support, 2111. support seat, 21 13. Plug bolt, 2114. Thrust ball bearing, 2115. Active rubber-coated wheel, 2116. Second short support, 2117. Second connecting frame, 2118. Flange seat, 2119. Driven rubber-coated wheel, 2120. Handle, 2121. Handle mounting seat; 2201. Connecting support, 220. Second connecting rod, 2203. First flange bearing, 2204. Pressure block, 2205. Square screw nut, 2206. Screw, 2207. Second flange bearing, 2208. Cover plate, 2209. Screw handle; 2301. Motor, 2302, upper waterproof shell, 2303, sealing cover, 2304, stuffing box, 2305, lower waterproof shell; 2401, graphite copper sleeve, 2402, mounting bracket, 2403, tension spring, 2404, encoder, 2405, metal knurled wheel; 2501, limit ring, 2502, guide block, 2503, first compression spring, 2504, copper column, 2505, gasket, 2506, fisheye bearing, 2507, sliding groove, 2509, probe mounting part, 2510, ultrasonic probe, 2511, guide sheet metal, 2 512. Toothed lower sheet metal, 2513. U-shaped slider, 2514. Support block, 2515. Pressing part, 2516. Toothed upper sheet metal, 2517. Limiting rack, 2518. Sheet metal piece, 2519. Toothed fastener, 2520. Guide rod, 2521. Sliding sleeve, 2522. Second compression spring; 301. Elastic handle, 302. Upper sealing cover, 303. Control box housing, 304. Internal mounting structure, 305. Motor speed regulator, 306. Lower sealing cover, 307. Circuit board, 308. Large-capacity lithium battery. DETAILED DESCRIPTION

[0053] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0054] Example 1

[0055] like Figures 1 to 5As shown, the open-loop pipeline 1 ultrasonic detection device of this scheme consists of three parts: a scanning mechanism 2, a control box 3 and an ultrasonic flaw detector 4; the scanning mechanism 2 is used for automatic circumferential scanning and detection of the pipeline 1. The scanning mechanism 2 includes five modules: an embracing mechanism 21, a locking mechanism 22, a motor assembly 23, an encoder assembly 24 and an adjustment mechanism 25. An ultrasonic probe 2510 is provided on the adjustment mechanism 25. The motor assembly 23 and the control box 3 are connected by an aviation plug cable. The encoder assembly 24 and the ultrasonic probe 2510 are connected to the ultrasonic flaw detector 4 and output the scanning position and pipeline 1 defects on it.

[0056] like Figures 6 to 9 As shown, the clasping mechanism 21 is used to clamp the pipe 1. The clasping mechanism 21 includes a support base 2111 and clasping arms symmetrically arranged on both sides of the support base 2111. The clasping arms include a first connecting frame 2107 hinged on the support base 2111 and a rear clasping member 2103 fixedly connected to the support base 2111. The two first connecting frames 2107 are both transmission-connected to the locking mechanism 22. The rear clasping member 2103 is hinged to the front clasping member 2102 using a plug bolt 2113. A thrust ball bearing 2114 is also installed at the hinge to reduce end face friction and make the rotation smooth. The front joint 2102 is hinged to the first connecting frame 2107 through the first connecting rod 2104, wherein the end of the first connecting rod 2104 is hinged to the first short support 2106 fixed on the first connecting frame 2107 through the parent nail 2105, and the second short support 2116 on the first connecting frame 2107 is hinged to the support seat 2111 through the plug bolt 2113.

[0057] The front ends of the two front couplings 2102 are each provided with a metal knurled wheel 2101 with a bearing, and a second connecting frame 2117 is provided on each of the two first connecting frames 2107. An active rubber-coated wheel 2115 is provided on one of the second connecting frames 2117, and the active rubber-coated wheel 2115 is transmission-connected to the motor assembly 23. The other second connecting frame 2117 is provided with a driven rubber-coated wheel 2119 and an encoder assembly 24. The active rubber-coated wheel 2115, the driven rubber-coated wheel 2119 and the two knurled wheels 2101 with bearings are jointly surrounded by an embracing arm to form a variable-diameter ring body, and this ring body corresponds to the pipe 1 of the same size.

[0058] A rebound shock absorber 2109 is arranged between the first connecting frame 2107 and the support seat 2111, and the first long support 2108 and the second long support 2110 are hinged at both ends of the rebound shock absorber 2109, respectively. The first long support 2108 and the second long support 2110 are fixedly connected to the first connecting frame 2107 and the support seat 2111 respectively; the support seat 2111 is fixedly connected to the handle 2120 through the handle mounting seat 2121. During installation, you only need to hold the handle 2120 and press the clamping mechanism 21 hard on the pipe 1 to achieve clamping.

[0059] This solution can rotate in the circumferential direction of the pipe 1 through the rolling cooperation of the active rubber-coated wheel 2115, the driven rubber-coated wheel 2119 and the two bearing knurled wheels 2101 with the outer wall of the pipe 1, and can achieve high-precision circumferential scanning of the pipe 1 in conjunction with the ultrasonic probe 2510; the embracing arms of the embracing mechanism 21 are arranged symmetrically, and the front embracing member 2102 can be driven to rotate through the first connecting rod 2104, so that the diameter of the ring body formed by the two bearing knurled wheels 2101, the active rubber-coated wheel 2115 and the driven rubber-coated wheel 2119 can be adaptively adjusted to facilitate adaptation to pipes 1 of different diameters.

[0060] Example 2

[0061] like Figure 10 As shown, this embodiment provides a specific solution of the locking mechanism 22 on the basis of Example 1. The locking mechanism 22 includes a screw rod 2206, which is constrained by the cover plate 2208 and the support seat 2111 through the first flange bearing 2203 and the second flange bearing 2207. The cover plate 2208 is fixedly connected to the support seat 2111. The screw rod 2206 is threaded with a square screw rod 2206 nut 2205. The bottom of the square screw rod 2206 nut 2205 abuts against the pressure block 2204. The middle of the pressure block 2204 is provided with an avoidance hole for passing the screw rod 2206. The square screw rod 2206 is fixed with the support seat 2111. 06 The two side surfaces of the nut 2205 and the pressure block 2204 are slidably fitted with the inner side surface of the support seat 2111, and the other two sides of the pressure block 2204 are respectively connected to the two connecting supports 2201 through the second connecting rod 2202, and the two ends of the second connecting rod 2202 are respectively hinged to the pressure block 2204 and the connecting support 2201, and the two connecting supports 2201 are respectively fixedly connected to the two first connecting frames 2107; both ends of the screw rod 2206 are fixed by flange bearing limits, and one end of the screw rod 2206 protrudes from the support seat 2111 and is hinged with a screwing handle 2209 to facilitate the rotation of the screw rod 2206.

[0062] The locking mechanism 22 utilizes the self-locking performance of the screw rod 2206 to achieve the locking of the engaging mechanism 21, so that the active rubber-coated wheel 2115, the driven rubber-coated wheel 2119 and the knurled wheel with bearing 2101 maintain good friction on the pipe 1 to avoid slipping.

[0063] The clamping mechanism 21 is installed on the pipe 1 mainly relying on the clamping force provided by the locking mechanism 22, so that the active rubber-coated wheel 2115, the driven rubber-coated wheel 2119 and the two bearing knurled wheels 2101 are pressed against the outer wall of the pipe 1, wherein the locking mechanism 22 rotates the screw rod 2206 to make the square screw rod 2206 nut 2205 move axially and squeeze the pressure block 2204 at its bottom, and the pressure block 2204 can drive the first connecting frame 2107 to rotate through the second connecting rod 2202 and the connecting support 2201, and the first connecting frame 2107 can drive the two front engaging parts 2102 to rotate in opposite directions through the first connecting rod 2104, so that the bearing knurled wheel 2101 at the front end of the front engaging part 2102 is tightly attached to and locked with the pipe 1, and finally the clamping mechanism 21 is firmly clamped on the pipe 1.

[0064] Example 3

[0065] like Figures 11 to 15 As shown, this embodiment provides a specific solution of the adjustment mechanism 25 on the basis of Example 1. The adjustment mechanism 25 includes a support block 2514. The top and bottom of the support block 2514 are respectively provided with a toothed upper sheet metal 2516 and a toothed lower sheet metal 2512. Both sides of the toothed upper sheet metal 2516 and the toothed lower sheet metal 2512 are provided with a limit rack 2517. The two limit racks 2517 on the toothed upper sheet metal 2516 and the toothed lower sheet metal 2512 on the same side are arranged opposite to each other. U-shaped sliders 2513 are slidably provided on both sides of the support block 2514. A sheet metal piece 2518 is provided on the U-shaped slider 2513. A sliding sleeve 2521 is passed through the sheet metal piece 2518, and the sliding sleeve 2521 is provided with a contact with the sheet metal piece 251 8. The inner sides of the limiting ring 2501 abut against each other, and a toothed fastening part 2519 is provided on the sliding sleeve 2521 located on the outer side of the sheet metal piece 2518. The toothed fastening part 2519 is set with a gap between the sheet metal piece 2518, and the toothed fastening part 2519 is engaged with the limiting rack 2517. A sliding groove 2507 is provided on the support block 2514. The inner ends of the two sliding sleeves 2521 are slidably connected by a guide rod 2520, and a second compression spring 2522 is provided between the two sliding sleeves 2521. The outer ends of the two sliding sleeves 2521 are both provided with a pressing part 2515. A guide block 2502 is provided at the end of the U-shaped slider 2513, and a radial telescopic mechanism is provided on the guide block 2502. The ultrasonic probe 2510 is provided on the radial telescopic mechanism.

[0066] This solution can adjust the axial position of the ultrasonic probe 2510 on the pipe 1 through the adjustment mechanism 25. When the ultrasonic probe 2510 needs to be adjusted in position, the pressing piece 2515 is pressed to compress the second compression spring 2522, and the sliding sleeves 2521 at both ends move inward, so that the toothed engagement part disengages from the limiting rack 2517, and then the U-shaped slider 2513 is slid. When the ultrasonic probe 2510 is adjusted to a suitable position, the pressing piece 2515 is released. Under the action of the second compression spring 2522, the sliding sleeve 2521 automatically resets and the toothed engagement part automatically engages with the limiting rack 2517, finally realizing the axial position adjustment and fixation of the ultrasonic probe 2510.

[0067] Example 4

[0068] like Figure 11 、 Figure 16 and Figure 17 As shown, this embodiment, based on Example 3, provides a specific scheme of the radial telescopic mechanism, which includes a copper column 2504 radially parallel to the pipe 1, and the copper column 2504 is movably arranged on the guide block 2502. A U-shaped guide sheet metal 2511 is slidably provided on the guide block 2502, and the guide sheet metal 2511 is fixedly connected to the outer end of the copper column 2504. A gasket 2505 is provided at the inner end of the copper column 2504, and a first compression spring 2503 is provided on the copper column 2504 located between the guide block 2502 and the gasket 2505. The ultrasonic probe 2510 is arranged on the inner end of the copper column 2504.

[0069] A fisheye bearing 2506 is provided at the inner end of the copper column 2504 . The rotating surface of the fisheye bearing 2506 is parallel to the radial direction of the pipe 1 . The fisheye bearing 2506 is connected to the ultrasonic probe 2510 through a probe mounting member 2509 .

[0070] This solution can achieve adaptive adjustment of the ultrasonic probe 2510 in the radial direction of the pipe 1 through a radial telescopic mechanism, and the ultrasonic probe 2510 can be pressed against the outer wall of the pipe 1 by utilizing the tension of the first compression spring 2503; at the same time, a fisheye bearing 2506 is provided to enable the ultrasonic probe 2510 to be adaptively rotated, so that the ultrasonic probe 2510 can fit tightly against the pipe 1.

[0071] Example 5

[0072] like Figure 18As shown, based on Example 1, this embodiment provides a specific scheme of the encoder assembly 24, which includes a flange seat 2118 arranged on the second connecting frame 2117, a driven rubber-coated wheel 2119 arranged at one end of the flange seat 2118, and a graphite copper sleeve 2401 arranged at the other end of the flange seat 2118. A mounting bracket 2402 is arranged on the graphite copper sleeve 2401, and one end of the mounting bracket 2402 is rotatably arranged at the end of the graphite copper sleeve 2401, and an encoder 2404 is arranged at the other end of the mounting bracket 2402, a metal knurled wheel 2405 is arranged on the rotating shaft of the encoder 2404, and one end of the mounting bracket 2402 provided with the encoder 2404 is connected to the flange seat 2118 through a tension spring 2403.

[0073] The encoder assembly 24 of this solution is used to record the position and movement distance of the clutch mechanism 21 for precise positioning, provide scanning position information for the ultrasonic flaw detector 4, and combine with the signal detected by the ultrasonic probe 2510 to find the specific location of the defect in the pipeline 1; through the tension of the tension spring 2403, the metal knurled wheel 2405 can be tightly fitted with the outer wall of the pipeline 1.

[0074] Example 6

[0075] like Figure 19 As shown, this embodiment provides a specific solution of the motor assembly 23 based on the embodiment 1. The motor assembly 23 of this solution is the braking part of the clutch mechanism 21, which is used to drive the clutch mechanism 21 to automatically rotate to achieve circumferential scanning of the pipeline 1. The motor assembly 23 includes a motor 2301. The motor 2301 is preferably a DC servo reduction motor. The motor 2301 is sealed and wrapped by the buckling of the upper waterproof shell 2302, the lower waterproof shell 2305 and the second connecting frame 2117, and the buckling contact surface is coated with sealant. After closing, install the screws and tighten them. The output shaft of the motor 2301 and the active rubber-coated wheel 2115 are matched with D-shaped holes and fastened with top screws to ensure accurate and reliable transmission. The motor assembly 23 of this solution is waterproof, dustproof, and anti-interference. The DC servo reduction motor 2301 is surrounded by a snap-fit waterproof shell, and its control cable is led out from the sealing cover 2303 and the stuffing box 2304, which is well sealed. The control box 3 uses a waterproof shell, and each control component is also waterproof. Each connector uses a waterproof aviation plug, so that the internal circuit is well sealed.

[0076] Example 7

[0077] like Figure 20 and Figure 21As shown, this embodiment provides a specific solution for the control box 3 on the basis of Example 1. The control box 3 consists of an external shell and an internal electronic control system, which is used for power supply and control of the scanning mechanism 2. The external shell has good waterproof and dustproof capabilities, including an elastic handle 301, an upper sealing cover 302, a control box shell 303 and a lower sealing cover 306. There are silicone sealing pads at the connections and fittings of each part; the internal electronic control system is used to realize the control of the scanning mechanism 2, including an internal mounting structure 304 fixed on the control box shell 303, an external connector and a control button, etc. The internal mounting structure 304 is installed with a circuit board 307, a motor speed regulator 305 and a large-capacity lithium battery 308, so that the internal structure of the control box 3 is compact. At the same time, the control box 3 uses a waterproof shell, and each control component is also selected to be waterproof. Each connector uses a waterproof aviation plug, so that the internal circuit is well sealed.

[0078] like Figure 22 As shown, the control box 3 uses CAN communication to control the operation of the scanning mechanism 2. In this way, the motor speed regulator 305 will regularly upload feedback information such as the speed and current of the motor 2301. After reading the CAN message, the controller obtains the output through PID calculation and then sends the message through the CAN bus, thereby realizing closed-loop control of the speed and torque of the motor 2301, which can ensure that the scanning mechanism 2 runs at a steady speed on the pipeline 1 and improve the detection accuracy.

[0079] In combination with the above embodiments 1-7, the working process of this solution is described:

[0080] During installation of this solution, the screw rod 2206 is rotated in the reverse direction to loosen the locking mechanism 22, and the handle 2120 is grasped to press the engaging mechanism 21 against the pipe 1, so that the active rubber-coated wheel 2115, the driven rubber-coated wheel 2119 and the two knurled wheels with bearings 2101 are in close contact with the outer wall of the pipe 1. The screw rod 2206 is rotated to lock the engaging mechanism 21. The position of the ultrasonic probe 2510 is adjusted by the adjustment mechanism 25, and the motor 2301 is started. The ultrasonic probe 2510 scans the pipe 1 to be tested in the forward direction for a full circle, and at the same time transmits the internal damage information of the pipe 1 to be tested for a full circle to the ultrasonic flaw detector 4. The encoder 2404 sends the real-time position information during the scanning process to the ultrasonic flaw detector 4. When the detection is completed, the motor 2301 is rotated in the reverse direction to return the entire device to the original installation position value, and the locking mechanism 22 is loosened and the scanning mechanism 2 is removed.

[0081] The basic principle of ultrasonic testing performed by ultrasonic probe 2510 in this embodiment is to utilize the characteristics of ultrasonic waves as they propagate through a medium. Specifically, ultrasonic waves reflect, refract, and transmit through interfaces between different materials, generating echoes. By analyzing the characteristics of these echoes, information such as the internal structure, defects, and dimensions of the object being tested can be determined, thereby achieving non-destructive testing.

Claims

1. An open-loop pipeline ultrasonic detection device, characterized in that: The invention comprises an embracing mechanism for clamping a pipe, the embracing mechanism comprising a support base and embracing arms symmetrically arranged on both sides of the support base, the embracing arms comprising a first connecting frame hinged to the support base and a rear embracing member fixedly connected to the support base, the two first connecting frames are both transmission-connected to a locking mechanism, the rear embracing member is hingedly connected to a front embracing member, and the front embracing member is hingedly connected to the first connecting frame via a first connecting rod; The front ends of the two front coupling members are both provided with bearing knurled wheels, one of the first connecting frames is provided with an active rubber-coated wheel, the active rubber-coated wheel is transmission-connected to the motor assembly, and the other first connecting frame is provided with a driven rubber-coated wheel and an encoder assembly, the active rubber-coated wheel, the driven rubber-coated wheel and the two bearing knurled wheels are collectively surrounded by an embracing arm to form a ring body with a variable diameter; An adjustment mechanism is provided at one end of the support base, an ultrasonic probe is provided on the adjustment mechanism, the motor assembly is electrically connected to the control box, and the ultrasonic probe and encoder assembly are both electrically connected to the ultrasonic flaw detector; The locking mechanism includes a screw rod, a square screw rod nut is threaded on the screw rod, the bottom of the square screw rod nut is in contact with the pressure block, and the middle of the pressure block is provided with an avoidance hole for passing the screw rod. The two side surfaces of the square screw rod nut and the pressure block are slidably fitted with the inner side surface of the support seat, and the other two sides of the pressure block are respectively connected to the two connecting supports through the second connecting rod, and the two ends of the second connecting rod are respectively hinged to the pressure block and the connecting support, and the two connecting supports are respectively fixedly connected to the two first connecting frames.

2. The open-loop pipeline ultrasonic detection device according to claim 1, characterized in that: A rebound shock absorber is provided between the first connecting frame and the support seat, and long supports are hinged at both ends of the rebound shock absorber. The two long supports are fixedly connected to the first connecting frame and the support seat respectively.

3. The open-loop pipeline ultrasonic detection device according to claim 1, characterized in that: Both ends of the screw rod are fixed by flange bearings, and one end of the screw rod protrudes from the support seat and is hinged with a screw handle.

4. The open-loop pipeline ultrasonic detection device according to claim 1, characterized in that: The adjusting mechanism includes a support block, the top and bottom of the support block are respectively provided with a toothed upper sheet metal and a toothed lower sheet metal, both sides of the toothed upper sheet metal and the toothed lower sheet metal are provided with a limit rack, and the two limit racks on the toothed upper sheet metal and the toothed lower sheet metal on the same side are arranged facing each other, and U-shaped sliders are slidably provided on both sides of the support block, a sheet metal piece is provided on the U-shaped slider, a sliding sleeve is passed through the sheet metal piece, and a limiting ring is provided on the sliding sleeve that abuts against the inner side surface of the sheet metal piece, located A toothed fastener is provided on the sliding sleeve on the outer side of the sheet metal piece. A gap is set between the toothed fastener and the sheet metal piece, and the toothed fastener is engaged with the limiting rack. A sliding groove is provided on the support block. The inner ends of the two sliding sleeves are slidably connected by a guide rod, and a second compression spring is provided between the two sliding sleeves. A pressing piece is provided on the outer ends of the two sliding sleeves. A guide block is provided at the end of the U-shaped slider. A radial telescopic mechanism is provided on the guide block, and the ultrasonic probe is provided on the radial telescopic mechanism.

5. The open-loop pipeline ultrasonic detection device according to claim 4, characterized in that: The radial telescopic mechanism includes a copper column parallel to the radial direction of the pipeline, the copper column is movably arranged on the guide block, a U-shaped guide sheet metal is slidably provided on the guide block, the guide sheet metal is fixedly connected to the outer end of the copper column, a gasket is provided on the inner end of the copper column, a first compression spring is provided on the copper column located between the guide block and the gasket, and the ultrasonic probe is arranged on the inner end of the copper column.

6. The open-loop pipeline ultrasonic detection device according to claim 5, characterized in that: A fisheye bearing is provided at the inner end of the copper column, the rotating surface of the fisheye bearing is parallel to the radial direction of the pipeline, and the fisheye bearing is connected to the ultrasonic probe through a probe mounting piece.

7. The open-loop pipeline ultrasonic detection device according to claim 1, characterized in that: The encoder assembly includes a second connecting frame arranged on the first connecting frame, a flange seat is provided on the second connecting frame, the driven rubber-coated wheel is arranged at one end of the flange seat, a graphite copper sleeve is provided at the other end of the flange seat, a mounting bracket is provided on the graphite copper sleeve, and one end of the mounting bracket is rotatably arranged on the end of the graphite copper sleeve, an encoder is provided at the other end of the mounting bracket, a metal knurled wheel is provided on the rotating shaft of the encoder, and one end of the mounting bracket on which the encoder is provided is connected to the flange seat through a tension spring.

8. The open-loop pipeline ultrasonic detection device according to claim 1, characterized in that: The motor assembly includes a motor that is transmission-connected to an active rubber-coated wheel. The motor is sealed and wrapped by an upper waterproof shell and a lower waterproof shell. The upper waterproof shell and the lower waterproof shell are buckled together, and sealant is applied on the contact surfaces of the buckled shell.

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