Automatic detection device for outer diameter of high-temperature furnace tube

Abstract

The invention relates to the technical field of furnace tube detection, and discloses an automatic detection device for the outer diameter of a high-temperature furnace tube, and the automatic detection device comprises a driving assembly, the exterior of the driving assembly is fixedly connected with a first supporting plate, and the interiors of the upper end and the lower end of the first supporting plate are fixedly connected with supporting rods. A threaded rod is fixedly connected to the interior of the middle of the first supporting plate, a second supporting plate is arranged on the outer wall of one side of the supporting rod, a first roller is rotationally connected to the interior of the second supporting plate, a second roller is rotationally connected to the interior of the first supporting plate, and a supporting assembly is arranged on the upper surface of the second supporting plate and the upper surface of the driving assembly. A scanning assembly is arranged outside the supporting assembly. A third gear is driven by a motor to be meshed with a gear ring, under double-constraint transmission of a limiting plate and an adjusting rod, an infrared laser distance measuring sensor is driven to conduct 360-degree rotary scanning around the axis of the furnace tube, and full-circumferential and full-stroke automatic accurate detection of the outer diameter of the furnace tube in the high-temperature environment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of furnace tube detection, in particular to an automatic detection device for the outer diameter of a high-temperature furnace tube. Background Art

[0002] In industries like chemical and metallurgy, high-temperature furnace tubes serve as core pressure-bearing heat transfer equipment. The uniformity of their outer diameter and the integrity of their circumferential morphology are directly related to the safety and process stability of the equipment. Accurately inspecting the outer diameter of high-temperature furnace tubes is crucial for ensuring the continuity of industrial production and preventing safety incidents such as leaks and explosions.

[0003] In existing technology, the outer diameter of high-temperature furnace tubes is primarily inspected using contact measurement methods, typically represented by mechanical roller-type inspection devices and manual handheld caliper measurements. Taking the mechanical roller-type inspection method as an example, it typically consists of a contact roller, a displacement sensor, and a support frame. The contact roller rests against the outer wall of the furnace tube via an elastic mechanism, producing linear displacement as the tube surface fluctuates. A displacement sensor (such as a grating ruler) records the roller's displacement to convert it into the outer diameter. This type of device requires manual propulsion or movement along the axis of the furnace tube using simple guide rails, completing the inspection step by step. During the inspection process, the roller continuously rubs against the surface of the high-temperature furnace tube.

[0004] However, the inventors of this application have found that the above technology has at least the following technical problems: contact detection cannot achieve 360° full-circumferential continuous scanning, and can only obtain local point data, which makes it difficult to fully reflect the circumferential morphological characteristics of the furnace tube. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides an automatic detection device for the outer diameter of high-temperature furnace tubes, which solves the problem that contact detection cannot achieve 360° full-circumferential continuous scanning, can only obtain local point data, and is difficult to fully reflect the circumferential morphological characteristics of the furnace tube.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic detection device for the outer diameter of a high-temperature furnace tube, comprising a driving assembly, wherein the driving assembly is fixedly connected to a support plate 1 on the outside of the driving assembly, and the upper and lower ends of the support plate 1 are fixedly connected to a support rod, and the middle inner part of the support plate 1 is fixedly connected to a threaded rod, and one side outer wall of the support rod is provided with a support plate 2, and the inner part of the support plate 2 is rotatably connected to a roller 1, and the middle inner part of the support plate 2 is arranged at the thread of the threaded rod, and the inner part of the support plate 1 is rotatably connected to a roller 2, and the roller 2 and the roller 1 are arranged relative to the outer diameter of the furnace tube, and the upper inner parts of the support plate 2 and the driving assembly are provided with a snap assembly, the upper surfaces of the support plate 2 and the driving assembly are provided with a supporting assembly, and a scanning assembly is provided on the outside of the support assembly, and the support assembly is fixed to the upper surfaces of the support plate 2 and the driving assembly through the snap assembly.

[0007] By adopting the above technical solution, the motor-driven gear three of the scanning component is engaged with the ring gear of the support component. Under the dual-constraint transmission of the limit plate and the adjustment rod, the infrared laser ranging sensor is driven to perform a 360° uniform rotation scan around the axis of the furnace tube. At the same time, the double-headed motor of the driving component drives roller one and roller two along the axis of the furnace tube through gear transmission, so that the detector can synchronously complete the full coverage scan of the circumferential direction of the outer diameter of the furnace tube during the full stroke movement. Through the principle of non-contact laser ranging, the distance data of each point on the entire circumference of the furnace tube is obtained in real time. Compared with the local point measurement mode of traditional contact detection, the circumferential morphology of the furnace tube can be accurately restored, the measurement error caused by roller wear or thermal deformation in contact detection is avoided, and continuous and high-precision detection from the circumferential direction to the axial length is realized.

[0008] Preferably, the driving assembly includes a shell, the outer wall of the shell is fixedly connected to the outer wall of the support plate 1, and a ventilation hole is opened at the top of the shell.

[0009] Preferably, a double-headed motor is fixedly connected to the interior of the upper side of the shell, the output end of the double-headed motor is connected to gear one, the tooth end of gear one is meshingly connected to gear two, the interior of gear two is fixedly connected to fixed column one, one side outer wall of fixed column one is fixedly connected to the interior of roller two, and the other side outer wall of fixed column one is rotatably connected to the interior of support plate one.

[0010] Preferably, the support assembly includes a fixing ring, the upper surface of which is fixedly connected to a gear ring, and the bottom end of the fixing ring is fixedly connected to a plurality of mounting blocks, the outside of the mounting blocks being arranged inside the upper side of the driving assembly and support plate 2.

[0011] Preferably, the scanning assembly includes a motor, the outer wall of the motor is fixedly connected to a limiting plate 1, the outside of the limiting plate 1 is arranged inside a fixed ring, the output end of the motor is connected to a gear 3, and the top end of the gear 3 is rotatably connected to a limiting plate 2.

[0012] Preferably, the internal rotation of the limit plate 2 is connected to a connecting column, the top of the connecting column is fixedly connected to a detector, one side of the limit plate 2 is arranged inside the gear ring, the upper outer wall of the connecting column is fixedly connected to an adjusting rod, and one end of the adjusting rod is arranged outside the inside of the gear ring.

[0013] Preferably, the snap assembly includes a second fixing column, and the second fixing column fixes the fixing ring and the gear ring inside the upper side of the driving assembly and the second support plate through a mounting block.

[0014] Preferably, a spring is provided inside one end of the fixed column 2, a limiting block 1 is provided at one end of the spring, and a limiting block 2 is provided at the other end of the spring, and the outsides of the limiting block 1 and the limiting block 2 are both slidably connected to the inside of one end of the fixed column 2.

[0015] Preferably, the detector is an infrared laser ranging sensor, and its signal output end is connected to an external processor.

[0016] Preferably, the surfaces of the roller one and the roller two are provided with a high-temperature resistant ceramic coating, and the ends of the threaded rods are provided with nuts for manually adjusting the clamping distance of the support plate two.

[0017] The present invention provides an automatic detection device for the outer diameter of a high-temperature furnace tube. It has the following beneficial effects: 1. The motor drive gear 3 of the scanning assembly of the present invention is engaged with the ring gear. Under the dual-constraint transmission of the limit plate and the adjustment rod, it drives the infrared laser ranging sensor to perform 360° rotational scanning around the axis of the furnace tube, realizing full-circumferential and full-stroke automated and accurate detection of the outer diameter of the furnace tube in a high-temperature environment, avoiding errors and equipment loss caused by high-temperature burns or mechanical wear in traditional contact measurement, and significantly improving detection accuracy, real-time performance and safety.

[0018] 2. The snap assembly of the present invention uses a spring within the second fixing column to push the first and second limit blocks. When the support assembly's mounting block engages the mounting slots of the drive assembly and support plate 2, the elastic force forces the limit blocks into the mounting block's limit slots, creating a mechanical lock. To disassemble, simply squeeze the limit blocks to compress the springs, releasing the lock. This allows for rapid installation and removal of the support assembly, facilitating equipment maintenance and component replacement, effectively improving the convenience and efficiency of inspection operations and reducing downtime.

[0019] 3. The drive assembly of the present invention has ventilation holes at the top of its housing, creating an air convection channel during operation, continuously dissipating heat from the dual-headed motor and ensuring stable operation in high-temperature environments. The dual-headed motor, through the meshing transmission of Gear 1 and Gear 2, drives Roller 2 to rotate. The opposing Roller 1 abuts against the outer surface of the furnace tube, forming a clamping drive structure. The friction force drives the detection device to move smoothly along the axis of the furnace tube, ensuring the reliability and travel accuracy of the drive system under high-temperature conditions and ensuring the continuity and stability of the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the partial structure of the support plate 2 of the present invention; Figure 3 It is a schematic diagram of the local structure of the support rod of the present invention; Figure 4This is a schematic diagram of the local structure of the air vent of the present invention; Figure 5 It is a schematic diagram of a partial structure of a gear of the present invention; Figure 6 It is a schematic diagram of the local structure of the detector of the present invention; Figure 7 It is a schematic diagram of the local structure of the adjustment rod of the present invention; Figure 8 It is a schematic diagram of the local structure of the spring of the present invention.

[0021] Among them, 1. Drive assembly; 11. Housing; 12. Air vent; 13. Double-headed motor; 14. Gear 1; 15. Gear 2; 16. Fixed column 1; 2. Support plate 1; 3. Support rod; 4. Threaded rod; 5. Support plate 2; 6. Roller 1; 7. Roller 2; 8. Buckle assembly; 81. Fixed column 2; 82. Spring; 83. Limit block 1; 84. Limit block 2; 9. Support assembly; 91. Fixed ring; 92. Gear ring; 93. Mounting block; 10. Scanning assembly; 101. Motor; 102. Limit plate 1; 103. Gear 3; 104. Connecting column; 105. Limit plate 2; 106. Detector; 107. Adjustment rod. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please see the attached Figure 1 -Attached Figure 3 , an embodiment of the present invention provides an automatic detection device for the outer diameter of a high-temperature furnace tube, comprising a driving assembly 1, a driving assembly 1, a support plate 2 fixedly connected to the outside of the driving assembly 1, a support rod 3 fixedly connected to the inner parts of the upper and lower ends of the support plate 2, a threaded rod 4 fixedly connected to the middle inner part of the support plate 2, a support plate 2 5 is provided on the outer wall of one side of the support rod 3, a roller 1 6 is rotatably connected to the inner part of the support plate 2 5, the middle inner part of the support plate 2 5 is arranged at the thread of the threaded rod 4, a roller 2 7 is rotatably connected to the inner part of the support plate 2, and the roller 2 7 is arranged opposite to the roller 1 6 on the outer diameter of the furnace tube, a snap assembly 8 is provided on the upper inner part of the support plate 2 5 and the driving assembly 1, a support assembly 9 is provided on the upper surface of the support plate 2 5 and the driving assembly 1, a scanning assembly 10 is provided on the outside of the support assembly 9, and the support assembly 9 is fixed to the upper surface of the support plate 2 5 and the driving assembly 1 through the snap assembly 8.

[0024] Specifically, support plate 1 2 and support plate 2 5 are first installed around the outer diameter of the furnace tube using support rod 3 and threaded rod 4. Support plate 2 5 is then secured with a nut. The power output of drive assembly 1 drives roller 2 7, driving roller 2 7 to rotate. Simultaneously, the oppositely positioned roller 1 6 rests against the outer surface of the furnace tube, and the continuous operation of drive assembly 1 drives the entire detection device along the outer wall of the furnace tube. Support assembly 9, mounted on the upper surfaces of drive assembly 1 and support plate 2 5, is securely locked by snap assembly 8. Scanning assembly 10 rotates based on support assembly 9, measuring its distance to the outer surface of the furnace tube in real time during continuous rotation. This distance data is then transmitted to an external processor for real-time calculation and analysis, ultimately obtaining the precise outer diameter and topography of the furnace tube along its circumference.

[0025] Please see the attached Figure 4 and attached Figure 5 The driving component 1 includes a shell 11, the outer wall of the shell 11 is fixedly connected to the outer wall of the support plate 2, and an air vent 12 is opened at the top of the shell 11; a double-headed motor 13 is fixedly connected to the upper side of the shell 11, and the output end of the double-headed motor 13 is connected to a gear 14, and the tooth end of the gear 14 is meshed with the gear 2 15, and the inside of the gear 2 15 is fixedly connected to a fixed column 16, and the outer wall of one side of the fixed column 16 is fixedly connected to the inside of the roller 2 7, and the outer wall of the other side of the fixed column 16 is rotatably connected to the inside of the support plate 2.

[0026] Specifically, the outer shell 11 serves as a supporting carrier, and its outer wall is fixedly connected to the support plate 12 to form a stable installation reference. The air vent 12 opened at the top can form an air convection channel when the device is running, continuously providing heat dissipation support for the double-headed motor 13, and ensuring the stable operation of the motor in a high-temperature environment. After the double-headed motor 13 is started, its output end drives the gear 14 to rotate, and transmits power to the gear 2 15 through the gear 14, so that the gear 2 15 rotates synchronously. The gear 2 15 is rigidly connected to the roller 2 7 through the fixed column 16, thereby transmitting the rotational power to the roller 2 7. Since the roller 2 7 and the roller 1 6 are relatively against the outer surface of the furnace tube, the two form a clamping drive structure. When the roller 2 7 rotates, the friction force can be used to drive the entire detection device to move smoothly along the axis of the furnace tube.

[0027] Please see the attached Figure 6 and attached Figure 7The supporting assembly 9 includes a fixing ring 91, the upper surface of the fixing ring 91 is fixedly connected to a gear ring 92, the bottom end of the fixing ring 91 is fixedly connected to a plurality of mounting blocks 93, and the outside of the mounting block 93 is arranged inside the upper side of the driving assembly 1 and the support plate 2 5; the scanning assembly 10 includes a motor 101, the outer wall of the motor 101 is fixedly connected to the limiting plate 102, the outside of the limiting plate 102 is arranged inside the fixing ring 91, the output end of the motor 101 is connected to the gear three 103, the top of the gear three 103 is rotatably connected to the limiting plate 2 105; the internal rotatable connection of the limiting plate 2 105 is connected to a connecting column 104, the top of the connecting column 104 is fixedly connected to a detector 106, one side of the limiting plate 2 105 is arranged inside the gear ring 92, the upper outer wall of the connecting column 104 is fixedly connected to an adjusting rod 107, and one end of the adjusting rod 107 is arranged outside the inside of the gear ring 92.

[0028] Specifically, the fixing ring 91 is embedded in the upper interior of the drive assembly 1 and the support plate 2 5 through the bottom mounting block 93, forming a rigid support base. The motor 101 slides inside the fixing ring 91 through the limit plate 102. The gear 3 103 at the output end of the motor 101 meshes with the ring gear 92. When the motor 101 is started, the gear 3 103 performs a circular motion under the constraint of the ring gear 92, driving the limit plate 2 105 to slide along the inside of the ring gear 92. The limit plate 2 105 is rigidly connected to the detector 106 through the connecting column 104. At the same time, the other end of the adjustment rod 107 on the connecting column 104 is engaged in the tooth groove of the ring gear 92, forming a double-constraint transmission structure, ensuring that the detector 106 can perform a 360° rotation scan around the axis of the furnace tube at a fixed radius. During this process, the detector 106 is an infrared laser ranging sensor that continuously emits laser and receives reflected signals, and measures the distance between it and the outer surface of the furnace tube in real time. The distance data is transmitted to the external processor through the signal output end, and the outer diameter size and circumferential morphology data of the furnace tube are obtained after algorithm calculation.

[0029] Please see the attached Figure 8 A spring 82 is provided inside one end of the fixed column 81, a limiting block 83 is provided at one end of the spring 82, and a limiting block 84 is provided at the other end of the spring 82. The outsides of the limiting block 83 and the limiting block 84 are both slidably connected to the inside of one end of the fixed column 81.

[0030] Specifically, when the mounting block 93 of the support assembly 9 is inserted into the mounting slots of the drive assembly 1 and the second support plate 5, an external force pushes the second fixing post 81 into the corresponding positioning hole. The spring 82 is compressed and generates elastic rebound force, pushing the first and second limiting blocks 83 and 84 to slide toward each other along the inner wall of the second fixing post 81 until they engage the limiting slots of the mounting block 93, forming a mechanical lock. During disassembly, an external force squeezes the first and second limiting blocks 83 and 84, causing them to move toward each other and compress the spring 82. When the limiting blocks are released from the slots, the second fixing post 81 can be pulled out, releasing the fixed constraint of the support assembly 9.

[0031] Please see the attached Figure 3 and attached Figure 6 The detector 106 is an infrared laser ranging sensor, and its signal output end is connected to an external processor; the surfaces of roller 1 6 and roller 2 7 are provided with a high-temperature resistant ceramic coating, and the end of the threaded rod 4 is provided with a handwheel 41 for manually adjusting the clamping distance of the support plate 2 5.

[0032] Specifically, the detector 106 uses an infrared laser ranging sensor. Through the principle of non-contact measurement, it emits laser light in real time and receives the reflected signal from the outer surface of the furnace tube, transmits the distance data to an external processor, and dynamically generates the outer diameter size and circumferential morphology data of the furnace tube after algorithm calculation, thereby achieving high-precision, real-time detection of the outer diameter of the furnace tube in a high-temperature environment, avoiding the detection errors and equipment losses caused by high-temperature burns or mechanical wear in traditional contact measurement. The high-temperature resistant ceramic coating on the surface of roller 1 6 and roller 2 7 has excellent thermal stability and wear resistance. It can maintain structural integrity when continuously rolling on the outer wall of the high-temperature furnace tube, and prevent the travel accuracy and reliability of the drive component 1 from being affected by high-temperature softening or friction loss. The handwheel 41 at the end of the threaded rod 4 manually rotates to adjust the lateral displacement of the support plate 2 5 along the support rod 3, accurately changing the clamping distance between roller 1 6 and roller 2 7, thereby adapting to furnace tubes of different outer diameter specifications, and realizing rapid installation and universal adjustment of the detection device.

[0033] Working principle: First, manually adjust the support plate 2 5 through the nut at one end of the threaded rod 4 to move along the support rod 3, so that the roller 1 6 and the roller 2 7 adapt to the outer diameter of the furnace tube and rest against its outer wall. After tightening the nut to fix it, the double-headed motor 13 in the driving component 1 is engaged with the gear 1 14 and the gear 2 15 to drive the roller 2 7 to rotate, and the friction driving device moves along the axis of the furnace tube. During this period, the air vent 12 of the shell 11 dissipates heat for the motor, and the support component 9 pushes the limit block 1 83 and the limit block 2 84 into the slot through the spring 82 of the snap assembly 8. The mounting block 93 slot realizes elastic locking, and the motor 101 of the scanning assembly 10 drives the gear three 103 to engage with the ring gear 92. Under the constraints of the limit plate 2 105, the limit plate 1 102 and the adjustment rod 107, it drives the detector 106 infrared laser ranging sensor to rotate 360° around the axis of the furnace tube and scan, measure the distance data in real time and transmit it to the external processor to generate outer diameter and morphology information, so as to realize automatic and accurate detection of the outer diameter of the high-temperature furnace tube in all directions and all strokes, and solve the problems of low efficiency, poor accuracy and safety hazards of traditional detection.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic detection device for the outer diameter of a high-temperature furnace tube, comprising a drive assembly (1), characterized in that: The driving assembly (1) is fixedly connected to a support plate 1 (2) on the outside of the driving assembly (1), and the upper and lower ends of the support plate 1 (2) are fixedly connected to support rods (3), and the middle interior of the support plate 1 (2) is fixedly connected to a threaded rod (4), and a support plate 2 (5) is provided on the outer wall of one side of the support rod (3), and the inside of the support plate 2 (5) is rotatably connected to a roller 1 (6), and the middle interior of the support plate 2 (5) is provided at the thread of the threaded rod (4), and the support plate 1 (2 ) is rotatably connected to roller 2 (7) inside, and roller 2 (7) and roller 1 (6) are arranged on the outer diameter of the furnace tube relative to each other, and buckle assemblies (8) are arranged inside the upper sides of the support plate 2 (5) and the drive assembly (1), and support assemblies (9) are arranged on the upper surfaces of the support plate 2 (5) and the drive assembly (1), and a scanning assembly (10) is arranged outside the support assembly (9), and the support assembly (9) is fixed to the upper surfaces of the support plate 2 (5) and the drive assembly (1) through the buckle assemblies (8).

2. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 1, characterized in that: The driving assembly (1) comprises a housing (11), the outer wall of the housing (11) is fixedly connected to the outer wall of the supporting plate (2), and a ventilation hole (12) is provided at the top end of the housing (11).

3. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 2, characterized in that: A double-headed motor (13) is fixedly connected to the interior of the upper side of the housing (11), the output end of the double-headed motor (13) is connected to gear one (14), the tooth end of the gear one (14) is meshingly connected to gear two (15), the interior of the gear two (15) is fixedly connected to a fixed column one (16), one side outer wall of the fixed column one (16) is fixedly connected to the interior of roller two (7), and the other side outer wall of the fixed column one (16) is rotatably connected to the interior of support plate one (2).

4. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 3, characterized in that: The support assembly (9) comprises a fixing ring (91), the upper surface of the fixing ring (91) is fixedly connected to a gear ring (92), the bottom end of the fixing ring (91) is fixedly connected to a plurality of mounting blocks (93), and the outside of the mounting blocks (93) is arranged inside the upper side of the driving assembly (1) and the second support plate (5).

5. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 4, characterized in that: The scanning assembly (10) includes a motor (101), the outer wall of the motor (101) is fixedly connected to a limiting plate (102), the outside of the limiting plate (102) is arranged inside a fixed ring (91), the output end of the motor (101) is connected to a gear (103), and the top end of the gear (103) is rotatably connected to a limiting plate (105).

6. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 5, characterized in that: The second limiting plate (105) is internally rotatably connected to a connecting column (104), the top of the connecting column (104) is fixedly connected to a detector (106), one side of the second limiting plate (105) is arranged inside the gear ring (92), the upper outer wall of the connecting column (104) is fixedly connected to an adjusting rod (107), and one end of the adjusting rod (107) is externally arranged inside the gear ring (92).

7. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 4, characterized in that: The buckle assembly (8) comprises a second fixing column (81), and the second fixing column (81) fixes the fixing ring (91) and the gear ring (92) to the upper inner side of the driving assembly (1) and the second support plate (5) through the mounting block (93).

8. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 7, characterized in that: A spring (82) is provided inside one end of the second fixed column (81), a limiting block (83) is provided at one end of the spring (82), and a limiting block (84) is provided at the other end of the spring (82), and the outsides of the limiting block (83) and the limiting block (84) are both slidably connected to the inside of one end of the second fixed column (81).

9. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 6, characterized in that: The detector (106) is an infrared laser ranging sensor, and its signal output end is connected to an external processor.

10. The automatic detection device for the outer diameter of a high-temperature furnace tube according to claim 1, characterized in that: The surfaces of the roller 1 (6) and the roller 2 (7) are provided with a high-temperature resistant ceramic coating, and the end of the threaded rod (4) is provided with a nut for manually adjusting the clamping distance of the support plate 2 (5).

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