A high-temperature pipeline circumferential automatic scanning device

Abstract

This invention relates to the field of pipeline inspection technology, and more particularly to an automatic circumferential inspection device for high-temperature pipelines. The device includes a variable-diameter pipeline clamping mechanism, a circumferential guiding mechanism, a circumferential driving mechanism, a sensor lifting mechanism, and a sensor clamping mechanism. The circumferential guiding mechanism is equipped with a high-temperature protection component and a circumferential driving mechanism. The circumferential driving mechanism is connected to the sensor lifting mechanism, which in turn is connected to the sensor clamping mechanism. The sensor clamping mechanism includes a first limiting frame and a second limiting frame. A linear guide rail assembly is mounted on the upper side of the first limiting frame. High-temperature sensors are mounted on the first and second limiting frames respectively via a first elastic pressing member and a second elastic pressing member. Using the above-mentioned automatic circumferential inspection device for high-temperature pipelines, the clamping and positioning of the high-temperature sensors is achieved. The distance between the two high-temperature sensors is adjustable. The structure is simple and small in size, facilitating in-service inspection of high-temperature pipelines in special locations or confined spaces.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, and in particular to an automatic circumferential inspection device for high-temperature pipelines. Background Technology

[0002] In industries such as petroleum, chemical, and power, there are numerous metal pipelines of various materials used to transport high-temperature, high-pressure, flammable, explosive, or toxic gases and liquids. These high-temperature pipelines are susceptible to corrosion and cracking due to the internal fluid flow and external environmental factors. Once a through-hole defect forms, leakage of the fluid can easily lead to catastrophic accidents. Therefore, in-service inspection and detection of non-through-hole defects in high-temperature pipelines are necessary. This effectively prevents accidents and saves the substantial economic losses associated with downtime inspections.

[0003] To improve the efficiency of scanning and detecting non-penetrating cracks propagating along the circumference, circumferential scanning is generally used. Circumferential scanning only requires the sensor to scan around the pipe once to obtain defects over a certain distance. Although existing circumferential detection setups achieve circumferential scanning, they cannot detect high-temperature pipes above 630°C. Furthermore, at different circumferential positions, the distance between the sensor and the high-temperature pipe changes due to gravity, leading to a decrease in detection accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic circumferential scanning device for high-temperature pipelines, thereby solving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides an automatic circumferential scanning device for high-temperature pipelines, comprising a variable diameter pipeline clamping mechanism, a circumferential guiding mechanism, a circumferential driving mechanism, a sensor lifting mechanism, and a sensor clamping mechanism.

[0006] The variable diameter pipe clamping mechanism is installed on the high-temperature pipe to be tested. The variable diameter pipe clamping mechanism is connected to the circumferential guide mechanism. The circumferential guide mechanism is equipped with a high-temperature protection component and a circumferential drive mechanism. The circumferential drive mechanism is connected to the sensor lifting mechanism, and the sensor lifting mechanism is connected to the sensor clamping mechanism.

[0007] The sensor clamping mechanism includes a first limiting frame and a second limiting frame. A linear guide rail assembly is installed on the upper side of the first limiting frame, and the moving block of the linear guide rail assembly is connected to the second limiting frame. The first limiting frame is connected to the sensor lifting mechanism. Clamping components are installed on both sides of the first limiting frame. A high-temperature sensor is installed on the first limiting frame and the second limiting frame through a first elastic pressing member and a second elastic pressing member, respectively.

[0008] Preferably, the variable diameter pipe clamping mechanism includes an arched clamp, a chain clamp, and an adjusting component. The chain clamp includes a first hinge, a second hinge, and a hook-shaped hinge. The first and second hinges are alternately hinged to form a chain structure. One end of the chain structure is hinged to one end of the arched clamp via a pin, and the other end of the chain structure is hinged to the hook-shaped hinge via a pin. The hook-shaped hinge is connected to the adjusting component at the other end of the arched clamp. An adjusting pipe clamping semi-circular ring is detachably installed on the inner side of the arched clamp to adapt to pipes of different diameters.

[0009] Preferably, the adjusting assembly includes a positioning block installed at the other end of the arched clamp. The positioning block has a through hole and an upper T-nut is fixed on the positioning block. An adjusting screw is internally threaded onto the upper T-nut. The bottom end of the adjusting screw passes through the transverse connecting plate and is threadedly connected to the lower T-nut. The bottom of the transverse connecting plate is a flat structure for installing the lower T-nut. The top of the transverse connecting plate is an arc-shaped structure. A hook-shaped hinge is attached to the top of the transverse connecting plate. A handwheel is provided at the top of the adjusting screw.

[0010] Preferably, the arched clamp has clamp connecting parts on both sides, the clamp connecting parts have several first mounting holes, and a water cooling pipe is provided on the inner side of the arched clamp, the water cooling pipe is connected to the cooling water circulation equipment.

[0011] Preferably, the circumferential guiding mechanism includes two mirror-arranged annular guide rails and a transmission gear ring;

[0012] The transmission gear ring includes an upper tooth portion and a lower tooth portion. The upper tooth portion has dovetail grooves at both ends and a second mounting hole that is opposite to the first mounting hole. The lower tooth portion has dovetail protrusions at both ends and a third mounting hole. The dovetail protrusions are located in the dovetail grooves.

[0013] The annular guide rail includes two opposing and detachably connected arc-shaped rails. The arc-shaped rail includes an L-shaped rail connecting part and a T-shaped rail guide part. The L-shaped rail connecting part has a fourth mounting hole. One of the annular guide rails is fixedly connected to the transmission gear ring. The transmission gear ring is connected to the clamp connecting part on one side of the arched clamp. The clamp connecting part on the other side of the arched clamp is connected to the other annular guide rail.

[0014] The high-temperature protection component includes an arc-shaped connector that can be detachably installed on an arc-shaped slide rail and a flexible thermal insulation coating layer wrapped around the high-temperature pipeline. The two arc-shaped connectors are respectively installed on two annular guide slide rails and are symmetrically arranged. Two fixing plates are provided on the arc-shaped connectors, and the two fixing plates are respectively used to fix the two ends of the flexible thermal insulation coating layer.

[0015] Preferably, the circumferential drive mechanism includes a mounting frame, a drive assembly is mounted on one side of the mounting frame, the output shaft of the drive assembly is connected to a drive gear that meshes with a transmission gear ring, mounting frames are provided on both sides inside the mounting frame, at least one H-shaped double-sided track wheel is provided on the upper part of the mounting frame, at least one single-sided pulley is provided on both sides of the lower part of the mounting frame, and a sensor lifting mechanism is mounted on the other side of the mounting frame.

[0016] Preferably, the first elastic pressing member is a bridge-type compression spring member installed on the linear guide rail assembly, and a first compression spring is installed on the bridge-type compression spring member. The first compression spring is arranged opposite to the high temperature sensor on the first limit frame.

[0017] The second elastic pressing component includes a damping connector installed at one end of the second limiting frame. A T-shaped compression spring is connected to the damping connector, and a second compression spring is installed on the T-shaped compression spring. The second compression spring is positioned opposite to the high-temperature sensor on the second limiting frame.

[0018] Preferably, the clamping assembly includes cantilever connectors installed on both sides of the first limiting frame. The cantilever connectors are connected to one end of the arc-shaped cantilever, and the other end of the arc-shaped cantilever is connected to the roller frame through a third compression spring. The roller frame is equipped with at least one roller through an adjusting plate, and the adjusting plate has at least two fifth mounting holes.

[0019] Preferably, the clamping assembly is further provided with a locking assembly, which includes a locking rod, the two ends of which are respectively connected to positioning elements on the two roller frames.

[0020] Preferably, the high-temperature sensor includes a protective housing, an electromagnetic ultrasonic guided wave sensor disposed inside the protective housing, and a high-temperature resistant ceramic plate fixed on the side of the protective housing opposite to the high-temperature pipe.

[0021] Therefore, the present invention employs the above-mentioned high-temperature pipeline circumferential automatic scanning device, which has the following beneficial effects:

[0022] (1) A high-temperature sensor is installed through the first elastic pressing part and the second elastic pressing part, which realizes the rapid clamping and positioning of the high-temperature sensor, which is convenient for the installation of the high-temperature sensor and has strong adaptability to the size of the high-temperature sensor. At the same time, the distance between the two high-temperature sensors is adjusted by the linear guide rail assembly to adapt to the different near-field blind zones of the electromagnetic ultrasonic guided wave sensor in pipes of different materials and specifications. The near-field blind zone is avoided by adjusting the distance between the sensors, which improves the accuracy of circumferential scanning. A lifting mechanism is also provided to fit the pipe during detection and to raise it for heat dissipation when not in operation, ensuring the scanning accuracy and sensor life.

[0023] (2) The high-temperature pipe is clamped by the variable diameter pipe clamping mechanism, so that a single device can quickly adapt to high-temperature pipes of different diameters. During the test, there is no need to replace the entire scanning frame. Only the corresponding adjusting pipe clamp semi-circular ring needs to be disassembled or installed to quickly adapt to high-temperature pipes of different sizes, which significantly improves the efficiency of industrial field testing and the versatility of the equipment, and reduces the equipment cost of multi-specification testing.

[0024] (3) A high-temperature protection component is provided on the circumferential guide mechanism. The high-temperature protection component includes an arc-shaped connector that can be detachably installed on the arc-shaped slide rail and a flexible heat insulation covering layer wrapped on the high-temperature pipe. A water-cooling pipe is provided on the inner side of the arched clamp. The water-cooling pipe is connected to the cooling water circulation equipment. By forming a dual protection of "passive heat insulation + active cooling", the drive component of the circumferential drive mechanism is arranged vertically, which increases the distance from the heat source and further improves the service life of the drive component, so that the whole device can adapt to the detection of high-temperature pipes above 630℃.

[0025] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an automatic circumferential scanning device for high-temperature pipelines according to the present invention;

[0027] Figure 2 This is a schematic diagram of the variable diameter pipe clamping mechanism of the present invention;

[0028] Figure 3 This is a schematic diagram of the annular guide rail structure of the present invention;

[0029] Figure 4 This is a cross-sectional view of the annular guide rail of the present invention;

[0030] Figure 5 This is a schematic diagram of the transmission gear ring structure of the present invention;

[0031] Figure 6 This is a side view of an automatic circumferential scanning device for high-temperature pipelines according to the present invention.

[0032] Figure 7 This is a schematic diagram of the sensor clamping mechanism of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the present invention with a high-temperature protection component installed;

[0034] Figure 9 This is a schematic diagram of the pipe clamping mechanism with adjustable pipe clamp semi-circular ring for Example 2.

[0035] Figure Labels

[0036] 1. Variable diameter pipe clamping mechanism; 11. Arched clamp; 111. Clamp connection; 112. First mounting hole; 12. Chain clamp; 121. First hinge; 122. Second hinge; 123. Hook hinge; 13. Adjusting assembly; 131. Positioning block; 132. Upper T-nut; 133. Adjusting screw; 134. Transverse connecting plate; 135. Lower T-nut; 136. Handwheel; 14. Adjusting pipe clamp semi-circular ring; 2. Circumferential guide mechanism; 21. Annular guide slide rail; 211. L-shaped slide rail connection; 212. Fourth mounting hole; 213. T-shaped slide rail guide; 22. Transmission gear ring; 221. Upper tooth; 222. Lower tooth; 223. Second mounting hole; 224. Third mounting hole; 23. Arc-shaped connector; 231. Fixing plate; 24. Flexible thermal insulation coating layer 3. Circumferential drive mechanism; 31. Mounting bracket; 32. Drive assembly; 33. Drive gear; 34. Mounting frame; 35. H-shaped double-sided track wheel; 36. Single-sided pulley; 4. Sensor lifting mechanism; 5. Sensor clamping mechanism; 51. First limiting frame; 52. Second limiting frame; 53. Linear guide rail assembly; 54. Clamping assembly; 541. Cantilever connector; 542. Arc-shaped cantilever; 543. Third compression spring; 544. Roller frame; 545. Adjusting plate; 546. Roller; 547. Fifth mounting hole; 548. Locking rod; 549. Positioning component; 55. First elastic pressing component; 551. Bridge-type compression spring component; 552. First compression spring; 56. Second elastic pressing component; 561. Damping connector; 562. T-shaped compression spring component; 563. Second compression spring; 6. High temperature sensor. Detailed Implementation

[0037] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing the invention 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 the invention. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figure 1 As shown, a high-temperature pipeline circumferential automatic scanning device includes a variable diameter pipeline clamping mechanism 1, a circumferential guiding mechanism 2, a circumferential driving mechanism 3, a sensor lifting mechanism 4, and a sensor clamping mechanism 5.

[0041] like Figure 2 As shown, in this embodiment, a high-temperature pipe with a large diameter is fixed. After removing the adjusting clamp semi-circular ring, the variable diameter pipe clamping mechanism 1 is installed on the high-temperature pipe to be tested. The variable diameter pipe clamping mechanism 1 includes an arched clamp 11, a chain clamp 12, and an adjusting component 13. The arched clamp 11 has clamp connecting parts 111 on both sides, and the clamp connecting parts 111 have several first mounting holes 112. The chain clamp 12 includes a first hinge 121, a second hinge 122, and a hook-shaped hinge 123. The first hinge 121 and the second hinge 122 are alternately hinged to form a chain structure. One end of the chain structure is hinged to one end of the arched clamp 11 by a pin, and the other end of the chain structure is hinged to the hook-shaped hinge 123 by a pin. The hook-shaped hinge 123 is connected to the adjusting component 13 at the other end of the arched clamp 11. The adjusting assembly 13 includes a positioning block 131 installed at the other end of the arched clamp 11. The positioning block 131 has a through hole and an upper T-nut 132 is fixed on the positioning block 131. An adjusting screw 133 is internally threaded onto the upper T-nut 132. The bottom end of the adjusting screw 133 passes through the transverse connecting plate 134 and is threadedly connected to the lower T-nut 135. The bottom of the transverse connecting plate 134 is a flat structure for installing the lower T-nut 135, and the top of the transverse connecting plate 134 is an arc-shaped structure. A hook-shaped hinge 123 is hooked onto the top of the transverse connecting plate 134, and a handwheel 136 is provided on the top of the adjusting screw 133. By hooking the hook-shaped hinge 123 onto the transverse connecting plate 134 and rotating the adjusting screw 133 by the handwheel 136, the transverse connecting plate 134 is moved upward, thereby locking the chain structure and the chain clamp 12 to the pipeline. The length of the chain structure can be adjusted by adjusting the number of the first hinge 121 and the second hinge 122. The pipe clamping mechanism, which combines the arched clamp 11 with the chain clamp, is adopted. This not only makes it convenient for the scanning device to be quickly installed on the outside of the coating layer of high-temperature pipes, but also makes it suitable for high-temperature pipes of different diameters.

[0042] The variable-diameter pipe clamping mechanism 1 is connected to the circumferential guide mechanism 2, which includes two mirror-arranged annular guide rails 21 and a transmission gear ring 22. For example... Figure 5As shown, the transmission gear ring 22 includes an upper tooth portion 221 and a lower tooth portion 222. The upper tooth portion 221 has dovetail grooves at both ends and a second mounting hole 223 opposite to the first mounting hole 112. The lower tooth portion 222 has dovetail protrusions at both ends and a third mounting hole 224. The dovetail protrusions are located within the dovetail grooves. Figures 3-4 As shown, the annular guide rail 21 includes two opposing and detachably connected arc-shaped rails. The arc-shaped rail includes an L-shaped rail connecting part 211 and a T-shaped rail guide part 213. The L-shaped rail connecting part 211 has a fourth mounting hole 212. One of the annular guide rails 21 is fixedly connected to the transmission gear ring 22. The transmission gear ring 22 is connected to the clamp connecting part 111 on one side of the arched clamp 11. The clamp connecting part 111 on the other side of the arched clamp 11 is connected to the other annular guide rail 21.

[0043] A circumferential drive mechanism 3 is installed on the circumferential guide mechanism 2. The circumferential drive mechanism 3 includes a mounting frame 31, on one side of which a drive assembly 32 is installed. The drive assembly 32 uses a servo motor and a servo right-angle reducer. The servo right-angle reducer is placed vertically, and the motor is connected to the motion mechanism through the right-angle reducer. This increases the distance between the motor and the high-temperature pipeline, further reducing the heat radiation from the pipeline to the motor and increasing the overall service life of the scanning frame. A PT100 temperature sensor is placed inside the motor windings to collect the motor temperature in real time, enabling intelligent thermal management of the motor through a subsequent control terminal. This constitutes a complete integrated thermal protection system of "passive insulation - active cooling - intelligent management," significantly improving the service life and operational stability of the equipment under high-temperature conditions.

[0044] The output shaft of the servo right-angle reducer meshes with the drive gear 33 via a coupling with the transmission gear ring 22. The transmission gear ring 22 has a module of 3, 100 teeth, a pitch circle diameter of 300mm, an addendum circle diameter of 306mm, a dedendum circle diameter of 292.5mm, and a tooth width of 30mm. The drive gear 33 has a module of 3, 20 teeth, a pitch circle diameter of 60mm, an addendum circle diameter of 66mm, a dedendum circle diameter of 52.5mm, and a tooth width of 32mm, meeting the requirements for gear meshing. The center distance between the transmission gear ring 22 and the drive gear 33 is 180mm, and both have an ISO 6 accuracy class, allowing for high-precision rotation and meeting the requirements for sensor accuracy scanning. Both the large and small gears are made of 42CrMo material, which can withstand high-temperature working environments up to 650℃.

[0045] Mounting frames 34 are provided on both sides of the mounting bracket 31. The upper part of the mounting frame 34 is provided with two H-shaped double-sided track wheels 35. The gap between the H-shaped double-sided track wheels 35 and the T-shaped slide rail guide part 213 is only 0.05mm, which has no impact on the detection accuracy. The lower part of the mounting frame 34 is provided with five single-sided pulleys 36 on both sides. When the servo motor and servo right-angle reducer are started, the drive gear 33 moves along the transmission gear ring 22.

[0046] On the other side of the mounting bracket 31 is a sensor lifting mechanism 4 (using a lead screw structure, with a lifting platform threaded onto the lead screw structure). For example... Figure 6 As shown, the lifting platform of the sensor lifting mechanism 4 is connected to the sensor clamping mechanism 5. The sensor lifting mechanism 4 enables the lifting and lowering of the sensor clamping mechanism 5, ensuring that the high-temperature sensor 6 is in contact with the high-temperature pipe during operation and rises to dissipate heat during non-operation. Adjustable detachment is achieved through the sensor lifting mechanism 4, reducing direct heat conduction. The high-temperature sensor 6 includes a protective housing and an electromagnetic ultrasonic guided wave sensor housed within the protective housing. A high-temperature resistant ceramic plate is fixed to the side of the protective housing opposite to the high-temperature pipe.

[0047] like Figure 7As shown, the sensor clamping mechanism 5 includes a first limiting frame 51 and a second limiting frame 52. A linear guide rail assembly 53 is mounted on the upper side of the first limiting frame 51. The moving block of the linear guide rail assembly 53 is connected to the second limiting frame 52. The distance between the first limiting frame 51 and the second limiting frame 52 is adjusted by the linear guide rail assembly 53, thereby adjusting the distance between the high-temperature sensors 6 set in the first limiting frame 51 and the second limiting frame 52. The first limiting frame 51 is connected to the sensor lifting mechanism 4. Clamping assemblies 54 are mounted on both sides of the first limiting frame 51. The high-temperature sensors 6 are mounted on the first limiting frame 51 and the second limiting frame 52 respectively through a first elastic pressing member 55 and a second elastic pressing member 56. The first elastic pressing member 55 is a bridge-shaped compression spring 551 mounted on the linear guide rail assembly 53. A first compression spring 552 is mounted on the bridge-shaped compression spring 551, and the first compression spring 552 is arranged opposite to the high-temperature sensors 6 on the first limiting frame 51. The second elastic pressing member 56 includes a damping connector 561 installed at one end of the second limiting frame 52. A T-shaped compression spring 562 is connected to the damping connector 561. A second compression spring 563 is installed on the T-shaped compression spring 562. The second compression spring 563 is positioned opposite to the high temperature sensor 6 on the second limiting frame 52. The first clamping spring 552 and the second clamping spring 563 stably fix the high-temperature sensor 6 in the first limiting frame 51 and the second limiting frame 52. The clamping assembly 54 includes cantilever connectors 541 installed on both sides of the first limiting frame 51. The cantilever connectors 541 are connected to one end of the arc-shaped cantilever 542. The other end of the arc-shaped cantilever 542 is connected to the roller frame 544 through the third clamping spring 543 (using a high-strength, high-temperature resistant, high-pressure spring), realizing the adjustment of the distance between the roller frame 544 and the pipe. The roller frame 544 is equipped with four rollers 546 through the adjusting plate 545. The rollers 546 are in contact with the high-temperature pipe. The adjusting plate 545 has two fifth mounting holes 547. The clamping assembly 54 is also provided with a locking assembly, which includes a locking rod 548. The two ends of the locking rod 548 are respectively connected to the positioning parts 549 on the two roller frames 544. When the entire mechanism detects an inverted state, the upward lifting action of the arc-shaped cantilever 542 of the sensor clamping mechanism will prevent the two high-temperature sensors 6 from not adhering to the pipe due to gravity or other factors in the inverted state.

[0048] To adapt to the testing environment of high-temperature pipelines, a high-temperature protection component is installed on the circumferential guide mechanism 2, such as... Figure 8As shown, the high-temperature protection component includes an arc-shaped connector 23 detachably mounted on an arc-shaped slide rail and a flexible thermal insulation covering layer 24 wrapped around the high-temperature pipeline. The flexible thermal insulation covering layer 24 is made of a single type of asbestos of a certain thickness or a composite of multiple thermal insulation materials. Two arc-shaped connectors 23 are respectively mounted on two annular guide slide rails 21 and are symmetrically arranged. Two fixing plates 231 are provided on the arc-shaped connectors 23, which are used to fix the two ends of the flexible thermal insulation covering layer 24. The two ends of the flexible thermal insulation covering layer 24 are fixedly connected to the two fixing plates 231 by bolts, thus fixing the four corners of the flexible thermal insulation covering layer 24 and ensuring that the flexible thermal insulation covering layer 24 wraps around the high-temperature pipeline. A water-cooling pipe is provided inside the arched clamp 11, which is connected to a cooling water circulation device for simultaneous water cooling, actively cooling the variable-diameter pipe clamping mechanism 1 outside the flexible thermal insulation covering layer 24. A flexible thermal insulation layer 24 is installed on the high-temperature pipeline, allowing the variable-diameter pipeline clamping mechanism 1 to be fixed on the flexible thermal insulation layer 24 instead of directly contacting the high-temperature pipeline, thereby significantly blocking heat conduction. Actual measurements show that when the pipeline temperature reaches 600℃, the temperature conducted to the scanning structure components can be reduced to approximately 50℃. Furthermore, active circulating water cooling further enhances the heat dissipation effect.

[0049] Example 2

[0050] This embodiment targets high-temperature pipes with smaller diameters, requiring the installation of an adjusting clamp semi-circular ring 14. In this embodiment, bolts are used to install the adjusting clamp semi-circular ring 14 inside the arched clamp 11, achieving adaptation to the smaller diameter high-temperature pipes. This increases the contact area with the high-temperature pipe, preventing relative sliding between the variable diameter pipe clamping mechanism 1 and the high-temperature pipe, improving the connection reliability between the variable diameter pipe clamping mechanism 1 and the high-temperature pipe, and facilitating rapid on-site industrial testing. The modular adjusting clamp semi-circular ring 14, connected by bolts, allows a single device to quickly adapt to pipes of different diameters. During testing, there is no need to replace the entire scanning frame; only the corresponding adjusting clamp semi-circular ring 14 needs to be removed or installed to achieve rapid switching between large and small pipe sizes. This significantly improves the efficiency of on-site industrial testing and the versatility of the equipment, while reducing the equipment cost for multi-specification testing.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-temperature pipeline circumferential automatic scanning device, characterized in that: It includes a variable diameter pipe clamping mechanism, a circumferential guiding mechanism, a circumferential driving mechanism, a sensor lifting mechanism, and a sensor clamping mechanism; The variable diameter pipe clamping mechanism is installed on the high-temperature pipe to be tested. The variable diameter pipe clamping mechanism includes an arched clamp, a chain clamp, and an adjusting component. The chain clamp includes a first hinge, a second hinge, and a hook-shaped hinge. The first hinge and the second hinge are alternately hinged to form a chain structure. One end of the chain structure is hinged to one end of the arched clamp by a pin, and the other end of the chain structure is hinged to the hook-shaped hinge by a pin. The hook-shaped hinge is connected to the adjusting component set at the other end of the arched clamp. An adjusting pipe clamp semi-circular ring is detachably installed on the inner side of the arched clamp to adapt to pipes of different diameters. The variable diameter pipe clamping mechanism is connected to the circumferential guide mechanism, which includes two mirror-arranged annular guide rails and a transmission gear ring. The transmission gear ring includes an upper tooth portion and a lower tooth portion. The upper tooth portion has dovetail grooves at both ends and a second mounting hole that is opposite to the first mounting hole. The lower tooth portion has dovetail protrusions at both ends and a third mounting hole. The dovetail protrusions are located in the dovetail grooves. The annular guide rail includes two opposing and detachably connected arc-shaped rails. The arc-shaped rail includes an L-shaped rail connecting part and a T-shaped rail guide part. The L-shaped rail connecting part has a fourth mounting hole. One of the annular guide rails is fixedly connected to the transmission gear ring. The transmission gear ring is connected to the clamp connecting part on one side of the arched clamp. The clamp connecting part on the other side of the arched clamp is connected to the other annular guide rail. The circumferential guide mechanism is equipped with a high-temperature protection component and a circumferential drive mechanism. The high-temperature protection component includes an arc-shaped connector detachably mounted on an arc-shaped slide rail and a flexible thermal insulation coating layer wrapped around the high-temperature pipe. Two arc-shaped connectors are respectively mounted on two annular guide slide rails and are symmetrically arranged. Two fixing plates are provided on the arc-shaped connectors, and the two fixing plates are respectively used to fix the two ends of the flexible thermal insulation coating layer. The circumferential drive mechanism includes a mounting frame. A vertically arranged drive component is mounted on one side of the mounting frame. The output shaft of the drive component is connected to a drive gear that meshes with a transmission gear ring. Mounting frames are provided on both sides inside the mounting frame. At least one H-shaped double-sided track wheel is provided on the upper part of the mounting frame, and at least one single-sided pulley is provided on both sides of the lower part of the mounting frame. The sensor lifting mechanism is mounted on the other side of the mounting frame. The circumferential drive mechanism is connected to the sensor lifting mechanism, and the sensor lifting mechanism is connected to the sensor clamping mechanism. The sensor clamping mechanism includes a first limiting frame and a second limiting frame. A linear guide rail assembly is mounted on the upper side of the first limiting frame, and the moving block of the linear guide rail assembly is connected to the second limiting frame. The first limiting frame is connected to the sensor lifting mechanism. Clamping assemblies are mounted on both sides of the first limiting frame. The clamping assemblies include cantilever connectors mounted on both sides of the first limiting frame. The cantilever connectors are connected to one end of an arc-shaped cantilever, and the other end of the arc-shaped cantilever is connected to a roller frame through a third compression spring. The roller frame is equipped with at least one roller through an adjusting plate, and the adjusting plate has at least two fifth mounting holes. The clamping assembly is also equipped with a locking assembly, which includes a locking rod. The two ends of the locking rod are respectively connected to positioning parts on the two roller frames. The first limiting frame and the second limiting frame are respectively equipped with high-temperature sensors via the first elastic pressing member and the second elastic pressing member.

2. The high-temperature pipeline circumferential automatic scanning device according to claim 1, characterized in that: The adjustment assembly includes a positioning block installed at the other end of the arched clamp. The positioning block has a through hole and an upper T-nut is fixed on the positioning block. An adjusting screw is internally threaded onto the upper T-nut. The bottom end of the adjusting screw passes through the transverse connecting plate and is threaded onto the lower T-nut. The bottom of the transverse connecting plate is a flat structure for installing the lower T-nut. The top of the transverse connecting plate is an arc-shaped structure. A hook-shaped hinge is attached to the top of the transverse connecting plate. A handwheel is provided at the top of the adjusting screw.

3. The high-temperature pipeline circumferential automatic scanning device according to claim 2, characterized in that: The arched clamp has clamp connection parts on both sides, and the clamp connection parts have several first installation holes. A water cooling pipe is installed on the inner side of the arched clamp, and the water cooling pipe is connected to the cooling water circulation equipment.

4. The high-temperature pipeline circumferential automatic scanning device according to claim 3, characterized in that: The first elastic pressing component is a bridge-type compression spring component installed on the linear guide rail assembly. A first compression spring is installed on the bridge-type compression spring component, and the first compression spring is positioned opposite to the high temperature sensor on the first limit frame. The second elastic pressing component includes a damping connector installed at one end of the second limiting frame. A T-shaped compression spring is connected to the damping connector, and a second compression spring is installed on the T-shaped compression spring. The second compression spring is positioned opposite to the high-temperature sensor on the second limiting frame.

5. The high-temperature pipeline circumferential automatic scanning device according to claim 4, characterized in that: The high-temperature sensor includes a protective housing, an electromagnetic ultrasonic guided wave sensor installed inside the protective housing, and a high-temperature resistant ceramic plate fixed on the side of the protective housing opposite to the high-temperature pipe.

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