A device and method for measuring inner and outer diameters of hot-rolled seamless steel pipes

Abstract

The present invention relates to the technical field of diameter detection, specifically to an inner and outer diameter measuring device and method for hot-rolled seamless steel pipe processing, comprising a base and a seamless steel pipe body arranged above the base, and also comprising a detection support plate, which is constructed as two respectively placed on the inner and outer surfaces of the seamless steel pipe body, one side of the detection support plate is provided with a plurality of rollers that can contact the seamless steel pipe body, one side of the detection support plate is provided with an encoder for detecting the number of rotations of the rollers, and the interior of the detection support plate is provided with an extrusion assembly that pushes the rollers to be close to the surface of the seamless steel pipe body; a marking liquid shell, which is constructed as two for storing different marking liquids, the interior of the detection support plate is slidably connected with an infusion tube that is rotatably connected to one side of the roller, and the marking liquid shell is connected with the infusion tube, and the interior of the marking liquid shell is provided with a liquid pushing assembly that cooperates with the extrusion assembly. The different marking liquids in the two marking liquid shells are sprayed out through the nozzle, so as to intuitively distinguish the defect types.

Description

Technical Field

[0001] The present invention relates to the technical field of diameter detection, and in particular to an inner and outer diameter measuring device and method for hot-rolled seamless steel pipe processing. Background Art

[0002] Hot rolled seamless steel pipe is a steel pipe manufactured by hot rolling process, which has high strength, good mechanical properties and a wide range of applications, such as oil, gas, chemical, power and other industries. In the production process of hot rolled seamless steel pipe, precise control of the inner and outer diameters of the steel pipe is the key link to ensure product quality.

[0003] For example, the patent document with the prior art announcement number CN220670399U relates to the field of measuring the inner and outer diameters of seamless steel pipes, and in particular, relates to a device for measuring the inner and outer diameters of seamless steel pipes, including a base, a workbench is provided above the base, a groove is provided on the top surface of the workbench, the two sides of the groove are flush with the workbench, two fixed blocks are symmetrically provided in the groove, a triangular prism fixed block is provided on one side of each fixed block, and a fixing mechanism is provided on one side of each fixed block that passes through the triangular prism fixed block at a position eccentric to the center. The seamless steel pipe to be measured is placed in the groove, and the symmetrically arranged ball screws are pushed toward the middle, and the values ​​on both sides of the scale line are read and added to obtain the outer diameter of the seamless steel pipe. The seamless steel pipe to be measured is placed on a slider, and then the symmetrically arranged ball screws are pulled to both sides until they cannot be pulled, and the corresponding scale line values ​​of the two limit plates located on one side of the corresponding triangular prism fixed block are read and added to obtain the inner diameter of the seamless steel pipe.

[0004] In the prior art, a triangular prism fixing block is usually used to clamp the steel pipe to achieve diameter detection. However, in actual applications, during the production process of hot-rolled seamless steel pipes, due to factors such as high-temperature rolling, uneven cooling, and mechanical stress, its surface often has unevenness such as local depressions, protrusions, oxide scale peeling, or tiny cracks. These surface defects will cause traditional detection methods to only measure local contact points or single cross-sections of the steel pipe, and cannot fully cover the overall surface morphology of the steel pipe. Therefore, the measurement results are easily affected by surface defects and only reflect one-sided data of local areas. It is difficult to accurately characterize the true diameter and overall geometric characteristics of the steel pipe, thereby affecting the reliability and accuracy of the detection results. To this end, the present application proposes an inner and outer diameter measuring device and method for hot-rolled seamless steel pipe processing. Summary of the invention

[0005] The object of the present invention is to provide an inner and outer diameter measuring device and method for hot-rolled seamless steel pipe processing to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an inner and outer diameter measuring device for hot-rolled seamless steel pipe processing, comprising a base and a seamless steel pipe body arranged above the base, and also comprising: The detection support plate is constructed of two plates respectively placed on the inner and outer surfaces of the seamless steel pipe body, one side of the detection support plate is provided with a plurality of rollers that can contact the seamless steel pipe body, one side of the detection support plate is provided with an encoder for detecting the number of rotations of the rollers, and the interior of the detection support plate is provided with an extrusion component for pushing the rollers to be close to the surface of the seamless steel pipe body; The marking liquid shell is constructed of two parts for storing different marking liquids. The interior of the detection support plate is slidably connected with an infusion tube that is rotationally connected to one side of the roller, and the marking liquid shell is communicated with the infusion tube. The interior of the marking liquid shell is provided with a liquid pushing component that cooperates with the extrusion component.

[0007] The side plate is fixedly connected to the top of the base, and a driving component for driving the detection support plate to move is arranged inside the side plate.

[0008] Preferably, the extrusion assembly includes a feedback slide rod slidably connected to the inside of the detection support plate, one end of the feedback slide rod is fixedly connected to a bracket for supporting an encoder, the other end of the feedback slide rod is fixedly connected to a piston plate, and the outer surface of the feedback slide rod is sleeved with a spring, one end of the spring is fixedly connected to the detection support plate, and the other end of the spring is fixedly connected to the piston plate.

[0009] Preferably, a gas cylinder is fixedly connected to one side of the detection support plate, and the gas cylinder is sleeved on the outer surface of the piston plate and adapted thereto, a liquid collection tube is fixedly connected to one side of the detection support plate, and the infusion tube extends to the interior of the liquid collection tube, and a connecting tube for supporting the marking liquid shell is connected between the gas cylinder and the liquid collection tube.

[0010] Preferably, the liquid pushing assembly includes an extrusion piston slidably connected to the inside of the marking liquid shell, the inside of the connecting tube is slidably connected to a storage piston, and the top of the connecting tube is fixedly connected to a one-way valve for allowing gas to enter the inside of the connecting tube.

[0011] Preferably, a plurality of nozzles are provided inside the roller, and a semi-arc baffle adapted to the nozzles is slidably connected to the outer surface of the roller, and one end of the semi-arc baffle is fixedly connected to a support plate slidably connected to the detection support plate.

[0012] Preferably, a support plate is fixedly connected to the top of the support plate, an inclined groove is provided on the top of the support plate, a positioning rod is fixedly connected to one end of the extrusion piston, a plurality of positioning holes are provided inside the positioning rod, and a push rod adapted to the plurality of positioning holes is slidably connected to the bottom of the extrusion piston, and the bottom of the push rod is in contact with the support plate.

[0013] Preferably, the outer surface of the infusion tube is provided with a connecting hole communicating with the interior thereof, and the connecting hole is adapted to the connecting tube.

[0014] Preferably, the driving assembly includes a first cylinder fixedly connected to the top of the side plate, a slider is fixedly connected to the output end of the first cylinder, a rotating plate is fixedly connected to one side of the slider, the detection support plate is slidably connected to the inside of the rotating plate, both sides of the rotating plate are fixedly connected to a second cylinder for driving the detection support plate to move, one side of the slider is fixedly connected to a rotating motor for driving the rotating plate to rotate, one end of the rotating plate is fixedly connected to an extension frame, and a diameter gauge is fixedly connected to the top of the extension frame.

[0015] Preferably, a plurality of supports are fixedly connected to the top of the base, and a conveying roller for supporting the seamless steel pipe body is disposed on the top of each of the plurality of supports.

[0016] The present invention also provides a method for measuring inner and outer diameters of hot-rolled seamless steel pipes, comprising the following steps: S1. When in use, first place the seamless steel pipe body on the top of the base, and at the same time, one detection support plate is located on the outer surface of the seamless steel pipe body, and the other detection support plate is placed on the inner wall of the seamless steel pipe body; S2, then operate the driving assembly to rotate the detection support plate; S3. When the detection support plate is driven to rotate, it will drive the roller to roll on the surface of the seamless steel pipe body. At this time, the rolling of the roller will be recorded by the encoder. After rolling half a circle, the rolling path is checked by the encoder to obtain the circumference of the seamless steel pipe body and then converted into its diameter; S4. When the roller encounters a surface defect of the seamless steel pipe body during rolling, the force will drive the drainage component to operate so that the marking liquid is discharged to the surface of the seamless steel pipe body to mark the defect.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By closely contacting the roller with the surface of the seamless steel pipe body and recording the number of rotations of the roller through the encoder, the circumference of the steel pipe can be accurately calculated, and then the diameter can be derived. The extrusion assembly composed of the spring and the feedback slide bar can ensure that the roller is always in close contact with the surface of the steel pipe. Even when there is a slight unevenness on the surface of the steel pipe, it can maintain a stable contact force to avoid measurement errors. When the roller encounters a convex or concave defect on the surface of the steel pipe, it will trigger different movement mechanisms, and push different marking liquids in the two marking liquid shells to be ejected through the nozzles, so as to intuitively distinguish the defect type. The semi-arc baffle can block the nozzle away from the steel pipe to ensure that the marking liquid is accurately sprayed to the defect position, improving the accuracy and recognition of the marking. The damping system composed of the air cylinder and the piston plate can provide a stable moving resistance for the roller to avoid the roller from shaking when encountering an uneven surface, ensuring the stability of the measurement process. The spring provides a continuous pressing force for the roller to ensure that it always maintains contact with the surface of the steel pipe. High precision can be maintained even during high-speed inspection. The liquid pushing component and the extrusion component cooperate with each other to automatically trigger the injection of the marking liquid when the roller moves. At the same time, the extrusion piston is limited and reset through the cooperation of the inclined groove and the push rod to ensure the stability and accuracy of the marking liquid injection. The design of the positioning hole and the push rod enables the extrusion piston to be quickly reset and locked after completing an injection to avoid misoperation. The conveying roller can stably support and transport the seamless steel pipe body to achieve continuous inspection without manual intervention, thereby improving the inspection efficiency. The design of the connecting pipe and the one-way valve allows the gas to flow only in one direction, ensuring that the extrusion piston can accumulate force when moving, providing power for the subsequent injection of the marking liquid and realizing automated operation. The marking liquid of different colors is sprayed through the nozzle, which can intuitively display the raised and sunken defects on the surface of the steel pipe, facilitating subsequent manual or automated processing. The different marking liquids stored in the marking liquid shell can clearly distinguish the defect types, thereby improving the readability and practicality of the inspection results.

[0018] 2. By driving the slider to move through the first cylinder, the position of the diameter gauge and the detection support plate can be accurately adjusted to ensure that they are located at the central axis position of the seamless steel pipe body, avoiding measurement errors caused by position deviation. The rotating motor drives the rotating plate to rotate half a circle to ensure the integrity and accuracy of the measurement data. Combined with the measurement data of the roller and the encoder, high-precision calculation of the inner and outer diameters of the steel pipe can be achieved, further improving the reliability of the test results. The design of the first cylinder and the slider enables the diameter gauge and the detection support plate to flexibly adjust their positions to adapt to steel pipes of different diameters and lengths. The rotatable design of the rotating plate enables the detection support plate to cover the entire circumference of the steel pipe, ensuring comprehensive inspection of steel pipes of different specifications. The stable drive of the first cylinder and the second cylinder ensures the precise positioning and movement of the detection support plate and the roller, avoiding measurement errors caused by vibration or offset. The rigid design of the rotating plate ensures stability during rotation and avoids the impact of rotation jitter on measurement accuracy.

[0019] The present invention BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure in which the seamless steel pipe body is removed in the present invention; Figure 3 It is a structural schematic diagram of the side plate in the present invention; Figure 4 It is a structural schematic diagram of the detection support plate in the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the gas cylinder in the present invention; Figure 6 is a schematic diagram of the cross-sectional structure of the roller in the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the detection support plate in the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the structure enlargement in the middle; Fig. 9 It is a schematic diagram of the cross-sectional structure of the liquid collecting pipe in the present invention; Fig.10 For the present invention Fig. 9 A magnified schematic diagram of the structure at B in the middle; Fig.11 It is a schematic diagram of the cross-sectional structure of the infusion tube in the present invention.

[0021] In the figure: 100, base; 101, seamless steel pipe body; 102, support; 103, conveying roller; 200, detection support plate; 201, roller; 202, bracket; 203, encoder; 204, air cylinder; 205, feedback slide bar; 206, piston plate; 207, spring; 300, marking liquid shell; 301, liquid collection pipe; 302, connecting pipe; 303, infusion pipe; 304, connecting hole; 305 , semi-arc baffle; 306, support plate; 307, support piece; 308, nozzle; 309, power storage piston; 310, extrusion piston; 311, positioning rod; 312, positioning hole; 313, inclined groove; 314, push rod; 400, side plate; 401, first cylinder; 402, slider; 403, rotating motor; 404, rotating plate; 405, second cylinder; 406, extension frame; 407, diameter gauge. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1 , Figure 4 as well as Figure 5 The present invention provides a technical solution: an inner and outer diameter measuring device for hot-rolled seamless steel pipe processing, comprising a base 100 and a seamless steel pipe body 101 arranged above the base 100, a plurality of supports 102 are fixedly connected to the top of the base 100, and a conveying roller 103 for supporting the seamless steel pipe body 101 is arranged on the top of the plurality of supports 102. The seamless steel pipe body 101 can be stably supported by arranging the conveying roller 103, and the conveying roller 103 can rotate to transport the seamless steel pipe body 101 for rapid detection.

[0024] The detection support plate 200 is also included, which is constructed of two inner and outer surfaces respectively placed on the seamless steel pipe body 101. One side of the detection support plate 200 is provided with a plurality of rollers 201 that can contact the seamless steel pipe body 101. One side of the detection support plate 200 is provided with an encoder 203 for detecting the number of rotations of the roller 201. The interior of the detection support plate 200 is provided with an extrusion component for pushing the roller 201 to be close to the surface of the seamless steel pipe body 101. The extrusion component includes a feedback slide bar 205 slidably connected to the interior of the detection support plate 200. One end of the feedback slide bar 205 is fixedly connected to a bracket 202 for supporting the encoder 203. The other end of the feedback slide bar 205 is fixedly connected to a piston sheet 206. The outer surface of the feed slide rod 205 is sleeved with a spring 207, one end of the spring 207 is fixedly connected to the detection support plate 200, and the other end of the spring 207 is fixedly connected to the piston plate 206. By setting the roller 201 to be in stable contact with the surface of the seamless steel pipe body 101, as the detection support plate 200 moves, the roller 201 will be fixed along the surface of the seamless steel pipe body 101. The circumference of the seamless steel pipe body 101 can be obtained according to the rolling of the roller 201, and the diameter can be detected. At the same time, the spring 207 can apply force to move the roller 201, thereby ensuring that the roller 201 is close to the surface of the seamless steel pipe body 101, thereby achieving stable detection, wherein the extrusion component can apply continuous and stable force.

[0025] Among them, a gas cylinder 204 is fixedly connected to one side of the detection support plate 200, and the outer surface of the gas cylinder 204 is sleeved on the piston plate 206 and adapted thereto, a liquid collection pipe 301 is fixedly connected to one side of the detection support plate 200, and the infusion pipe 303 extends to the inside of the liquid collection pipe 301, and a connecting pipe 302 for supporting the marking liquid shell 300 is connected between the gas cylinder 204 and the liquid collection pipe 301. By setting the gas cylinder 204, a certain damping force can be applied to the piston plate 206, and the damping force can provide stable movement of the roller 201, and it will not shake even if it is resisted by uneven materials.

[0026] See also Figure 6 , Figure 7 as well as Figure 8 , and also includes a marking liquid shell 300, which is constructed as two for storing different marking liquids, the interior of the detection support plate 200 is slidably connected to an infusion tube 303 that is rotatably connected to one side of the roller 201, and the marking liquid shell 300 is communicated with the infusion tube 303, and the interior of the marking liquid shell 300 is provided with a liquid pushing component that cooperates with the extrusion component, and the liquid pushing component includes an extrusion piston 310 that is slidably connected to the interior of the marking liquid shell 300, and the interior of the connecting tube 302 is slidably connected to a storage piston 309, and the top of the connecting tube 302 is fixedly connected to an air supply The one-way valve that enters the connecting tube 302, wherein different marking liquids are stored in the marking liquid shell 300, which can effectively distinguish whether the surface defect of the seamless steel pipe body 101 is convex or concave, thereby improving the recognition. At the same time, a liquid pushing component is arranged to cooperate with an extrusion component, so that when the roller 201 is pushed, the gas in the conveying cylinder 204 is delivered, thereby driving the power storage piston 309 to move, and the one-way valve cannot leak gas from inside and outside the connecting tube 302, so that the power storage piston 309 will accumulate power when moving, thereby facilitating subsequent liquid discharge.

[0027] See also Fig. 9 , Fig.10 as well as Fig.11 Furthermore, a plurality of nozzles 308 are provided inside the roller 201, and a semi-arc baffle 305 adapted to the nozzle 308 is slidably connected to the outer surface of the roller 201, and one end of the semi-arc baffle 305 is fixedly connected to a support plate 306 slidably connected to the detection support plate 200, and a support sheet 307 is fixedly connected to the top of the support plate 306, and an inclined groove 313 is provided on the top of the support sheet 307, and a positioning rod 311 is fixedly connected to one end of the extrusion piston 310, and a plurality of positioning holes 312 are provided inside the positioning rod 311, and a push rod 314 adapted to the plurality of positioning holes 312 is slidably connected to the bottom of the extrusion piston 310, and the bottom of the push rod 314 is in conflict with the support sheet 307, and a connecting hole 304 communicating with the interior of the infusion tube 303 is provided on the outer surface of the infusion tube 303, The hole 304 is adapted to the connecting tube 302. By setting the cooperation between the connecting hole 304 and the connecting tube 302, when the roller 201 faces the protruding defect, it will simultaneously drive the infusion tube 303 and the feedback slide bar 205 to move, so that the infusion tube 303 is connected with a connecting tube 302, thereby facilitating the marking liquid in the marking liquid shell 300 to enter the interior of the infusion tube 303. At the same time, the cooperation between the inclined groove 313 and the push rod 314 makes it possible to drive the push rod 314 to move downward when the roller 201 moves, thereby releasing the limit on the extrusion piston 310. At this time, the extrusion piston 310 can be pushed to reset after moving and continue to be inserted into the interior of the positioning hole 312 to limit the extrusion piston 310, so that the extrusion piston 310 will not reset along with the reset of the roller 201, thereby achieving stable liquid discharge.

[0028] Specifically, when the roller 201 encounters a convex defect on the surface of the seamless steel pipe body 101 during rolling, it will be forced to squeeze the feedback slide bar 205 to move inside the air cylinder 204, thereby pushing the piston sheet 206 to squeeze the air at one end of the air cylinder 204, thereby pushing the power storage piston 309 to move, thereby increasing the air pressure between it and the squeezing piston 310. At the same time, the infusion tube 303 moves with the roller 201, thereby driving the connecting hole 304 to overlap with the connecting tube 302. At the same time, the movement of the roller 201 will also drive the semi-arc baffle 305 to push the support plate 306 to slide. The support piece 307 moves, thereby driving the support piece 307 to move so that the push rod 314 gradually approaches the inclined groove 313 and is forced to move downward, thereby releasing the limit on the positioning hole 312. At this time, the extrusion piston 310 moves quickly to push the marking liquid in the marking liquid shell 300 into the interior of the infusion tube 303, and then discharges it through the nozzle 308. When the roller 201 contacts the concave defect, its feedback slide bar 205 will move away in the air cylinder 204, thereby pushing the marking liquid in the other marking liquid shell 300 to be discharged through the nozzle 308, so as to distinguish between concave and protruding defects.

[0029] It is worth mentioning that different marking liquids are stored in the two marking liquid shells 300. Since the roller 201 will produce different movements when facing protruding and recessed defects, these two different movements will respectively push two different marking liquids into the interior of the infusion tube 303. At the same time, the semi-arc baffle 305 can easily block the nozzle 308 away from the seamless steel pipe body 101, thereby improving the accuracy of the liquid spray.

[0030] In summary, the roller 201 is in close contact with the surface of the seamless steel pipe body 101. The encoder 203 records the number of rotations of the roller 201, and the circumference of the steel pipe can be accurately calculated, and then the diameter can be derived. The extrusion assembly composed of the spring 207 and the feedback slide bar 205 can ensure that the roller 201 is always in close contact with the surface of the steel pipe. Even if there is a slight unevenness on the surface of the steel pipe, it can maintain a stable contact force to avoid measurement errors. When the roller 201 encounters a convex or concave defect on the surface of the steel pipe, it will trigger different movement mechanisms to push the two marking liquid shells respectively. Different marking liquids in 300 are sprayed out through the nozzle 308, so as to intuitively distinguish the defect types. The semi-arc baffle 305 can block the nozzle 308 away from the steel pipe to ensure that the marking liquid is accurately sprayed to the defect position, thereby improving the accuracy and recognition of the marking. The damping system composed of the air cylinder 204 and the piston plate 206 can provide a stable moving resistance for the roller 201 to prevent the roller 201 from shaking when encountering an uneven surface, thereby ensuring the stability of the measurement process. The spring 207 provides a continuous pressing force for the roller 201 to ensure that it is always in contact with the steel pipe. The surface is kept in contact, and high precision can be maintained even in the high-speed detection process. The liquid pushing component and the extrusion component cooperate with each other, and can automatically trigger the injection of the marking liquid when the roller 201 moves. At the same time, the cooperation of the inclined groove 313 and the push rod 314 realizes the limit and reset of the extrusion piston 310, ensuring the stability and accuracy of the marking liquid injection. The design of the positioning hole 312 and the push rod 314 enables the extrusion piston 310 to quickly reset and lock after completing one injection to avoid misoperation. The conveying roller 103 can stably support and transport the seamless steel pipe body 101 to achieve continuous detection without manual intervention, thereby improving the detection efficiency. The design of the connecting tube 302 and the one-way valve allows the gas to flow only in one direction, ensuring that the extrusion piston 310 can accumulate power when moving, providing power for the subsequent injection of the marking liquid, and realizing automatic operation. The marking liquid of different colors is sprayed through the nozzle 308, which can intuitively display the convex and concave defects on the surface of the steel pipe, which is convenient for subsequent manual or automatic processing. The different marking liquids stored in the marking liquid shell 300 can clearly distinguish the defect types, thereby improving the readability and practicality of the detection results.

[0031] Example 2: Please refer to Figure 1 , Figure 2 as well as Figure 3The present invention also provides a technical solution, which is different from the technical solution of the first embodiment: an inner and outer diameter measuring device for hot-rolled seamless steel pipe processing, further comprising a side plate 400, which is fixedly connected to the top of the base 100, and a driving component for driving the detection support plate 200 to move is arranged inside the side plate 400, and the driving component comprises a first cylinder 401 fixedly connected to the top of the side plate 400, a slider 402 is fixedly connected to the output end of the first cylinder 401, a rotating plate 404 is fixedly connected to one side of the slider 402, the detection support plate 200 is slidably connected to the inside of the rotating plate 404, and both sides of the rotating plate 404 are fixedly connected to a second cylinder 405 for driving the detection support plate 200 to move, and a rotating motor 403 for driving the rotating plate 404 to rotate is fixedly connected to one side of the slider 402, One end of the rotating plate 404 is fixedly connected to an extension frame 406 , and the top of the extension frame 406 is fixedly connected to a caliper 407 .

[0032] Specifically, the first cylinder 401 is operated to drive the slider 402 to move downward, so that the diameter gauge 407 is located at the central axis position of the seamless steel pipe body 101, and then the second cylinder 405 is operated to move the detection support plate 200, thereby driving multiple rollers 201 to contact the surface of the seamless steel pipe body 101, and then the rotating motor 403 is turned on to drive the rotating plate 404 to rotate half a circle. By driving it to rotate half a circle, the circumference of the seamless steel pipe body 101 can be obtained, and the inner and outer diameters of the seamless steel pipe body 101 can be converted through the circumference calculation method.

[0033] In summary, by driving the slider 402 to move through the first cylinder 401, the position of the diameter gauge 407 and the detection support plate 200 can be accurately adjusted to ensure that they are located at the central axis position of the seamless steel pipe body 101, thereby avoiding measurement errors caused by position deviations. The rotating motor 403 drives the rotating plate 404 to rotate half a circle to ensure the integrity and accuracy of the measurement data. Combined with the measurement data of the roller 201 and the encoder 203, high-precision calculation of the inner and outer diameters of the steel pipe can be achieved, further improving the reliability of the detection results. The design of the first cylinder 401 and the slider 402 makes The diameter gauge 407 and the detection support plate 200 can flexibly adjust their positions to adapt to steel pipes of different diameters and lengths. The rotatable design of the rotating plate 404 enables the detection support plate 200 to cover the entire circumference of the steel pipe, ensuring comprehensive detection of steel pipes of different specifications. The stable drive of the first cylinder 401 and the second cylinder 405 ensures the precise positioning and movement of the detection support plate 200 and the roller 201, avoiding measurement errors caused by vibration or offset. The rigid design of the rotating plate 404 ensures stability during rotation, avoiding the influence of rotation jitter on measurement accuracy.

[0034] Example 3: Please refer to Figures 1 to 11The present invention also provides a technical solution, which is different from the technical solution of the first embodiment: a method for measuring the inner and outer diameters of hot-rolled seamless steel pipes, comprising the following steps: S1. When in use, firstly place the seamless steel pipe body 101 above a plurality of conveying rollers 103 to make it stationary, and at the same time, one detection support plate 200 is located on the outer surface of the seamless steel pipe body 101, and the other detection support plate 200 is located on the inner wall of the seamless steel pipe body 101, and then operate the first cylinder 401 to drive the slider 402 to move downward, so that the diameter gauge 407 is located at the central axis position of the seamless steel pipe body 101; S2, then operate the second cylinder 405 to move the detection support plate 200, thereby driving the plurality of rollers 201 to contact the surface of the seamless steel pipe body 101, and then start the rotating motor 403 to drive the rotating plate 404 to rotate half a circle; S3. When the detection support plate 200 is driven to rotate, the roller 201 will be driven to roll on the surface of the seamless steel pipe body 101. At this time, the rolling of the roller 201 will be recorded by the encoder 203. After rolling half a circle, the encoder 203 is used to check its rolling path to obtain the circumference of the seamless steel pipe body 101, which is then converted into its diameter. S4. When the roller 201 encounters a convex defect on the surface of the seamless steel pipe body 101 while rolling, it will be forced to squeeze the feedback slide bar 205 to move inside the air cylinder 204, thereby pushing the piston plate 206 to squeeze the air at one end of the air cylinder 204, thereby pushing the storage piston 309 to move, thereby increasing the air pressure between it and the squeezing piston 310. At the same time, the infusion tube 303 moves with the roller 201, thereby driving the connecting hole 304 to overlap with the connecting tube 302. At the same time, the movement of the roller 201 will also drive the semi-arc baffle 305 to push the support plate 306 to slide , thereby driving the support piece 307 to move so that the push rod 314 gradually approaches the inclined groove 313 and is forced to move downward, thereby releasing the limit on the positioning hole 312. At this time, the extrusion piston 310 moves quickly to push the marking liquid in the marking liquid shell 300 into the interior of the infusion tube 303, and then discharges it through the nozzle 308. When the roller 201 contacts the concave defect, its feedback slide bar 205 will move away in the air cylinder 204, thereby pushing the marking liquid in the other marking liquid shell 300 to be discharged through the nozzle 308, so as to distinguish between concave and protruding defects.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inner and outer diameter measuring device for hot-rolled seamless steel pipe processing, comprising a base (100) and a seamless steel pipe body (101) arranged on the base, characterized in that: Also includes: The detection support plate (200) is constructed of two parts respectively disposed on the inner and outer surfaces of the seamless steel pipe body (101); a plurality of rollers (201) capable of contacting the seamless steel pipe body (101) are disposed on one side of the detection support plate (200); an encoder (203) for detecting the number of rotations of the rollers (201) is disposed on one side of the detection support plate (200); and a pressing component for pushing the rollers (201) to closely contact the surface of the seamless steel pipe body (101) is disposed inside the detection support plate (200); The marking liquid shell (300) is constructed of two parts for storing different marking liquids, the detection support plate (200) is slidably connected to an infusion tube (303) rotatably connected to one side of the roller (201), and the marking liquid shell (300) is communicated with the infusion tube (303), and a liquid pushing component cooperating with the extrusion component is arranged inside the marking liquid shell (300); The side plate (400) is fixedly connected to the top of the base (100), and a driving component for driving the detection support plate (200) to move is arranged inside the side plate (400).

2. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 1, characterized in that: The extrusion assembly comprises a feedback slide bar (205) slidably connected to the inside of the detection support plate (200), one end of the feedback slide bar (205) is fixedly connected to a bracket (202) for supporting an encoder (203), the other end of the feedback slide bar (205) is fixedly connected to a piston plate (206), the outer surface of the feedback slide bar (205) is sleeved with a spring (207), one end of the spring (207) is fixedly connected to the detection support plate (200), and the other end of the spring (207) is fixedly connected to the piston plate (206).

3. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 2, characterized in that: A gas cylinder (204) is fixedly connected to one side of the detection support plate (200), and the outer surface of the gas cylinder (204) sleeved on the piston plate (206) is adapted thereto; a liquid collection tube (301) is fixedly connected to one side of the detection support plate (200), and a liquid infusion tube (303) extends into the interior of the liquid collection tube (301); a connecting tube (302) for supporting the marking liquid shell (300) is connected between the gas cylinder (204) and the liquid collection tube (301).

4. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 3, characterized in that: The liquid pushing assembly comprises an extrusion piston (310) slidably connected to the inside of the marking liquid shell (300), a force storage piston (309) is slidably connected to the inside of the connecting tube (302), and a one-way valve for allowing gas to enter the inside of the connecting tube (302) is fixedly connected to the top of the connecting tube (302).

5. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 4, characterized in that: A plurality of nozzles (308) are provided inside the roller (201), and a semi-arc baffle (305) adapted to the nozzles (308) is slidably connected to the outer surface of the roller (201), and one end of the semi-arc baffle (305) is fixedly connected to a support plate (306) slidably connected to the detection support plate (200).

6. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 5, characterized in that: A support sheet (307) is fixedly connected to the top of the support plate (306), an inclined groove (313) is provided on the top of the support sheet (307), a positioning rod (311) is fixedly connected to one end of the extrusion piston (310), a plurality of positioning holes (312) are provided inside the positioning rod (311), a push rod (314) adapted to the plurality of positioning holes (312) is slidably connected to the bottom of the extrusion piston (310), and the bottom of the push rod (314) contacts the support sheet (307).

7. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 3, characterized in that: The outer surface of the infusion tube (303) is provided with a connecting hole (304) communicating with the interior thereof, and the connecting hole (304) is adapted to fit the connecting tube (302).

8. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 1, characterized in that: The driving assembly comprises a first cylinder (401) fixedly connected to the top of the side plate (400); a slider (402) is fixedly connected to the output end of the first cylinder (401); a rotating plate (404) is fixedly connected to one side of the slider (402); the detection support plate (200) is slidably connected to the inside of the rotating plate (404); both sides of the rotating plate (404) are fixedly connected to a second cylinder (405) for driving the detection support plate (200) to move; a rotating motor (403) for driving the rotating plate (404) to rotate is fixedly connected to one side of the slider (402); an extension frame (406) is fixedly connected to one end of the rotating plate (404); and a diameter gauge (407) is fixedly connected to the top of the extension frame (406).

9. The inner and outer diameter measuring device for hot-rolled seamless steel pipe processing according to claim 1, characterized in that: A plurality of supports (102) are fixedly connected to the top of the base (100), and a conveying roller (103) for supporting the seamless steel pipe body (101) is disposed on the top of each of the plurality of supports (102).

10. A method for measuring inner and outer diameters of hot-rolled seamless steel pipes, according to an inner and outer diameter measuring device for hot-rolled seamless steel pipes according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. When in use, the seamless steel pipe body (101) is first placed on the base (100), and at the same time, one detection support plate (200) is located on the outer surface of the seamless steel pipe body (101), and the other detection support plate (200) is placed on the inner wall of the seamless steel pipe body (101); S2, then operating the driving assembly to rotate the detection support plate (200); S3. When the detection support plate (200) is driven to rotate, the roller (201) is driven to roll on the surface of the seamless steel pipe body (101). At this time, the rolling of the roller (201) is recorded by the encoder (203). After rolling half a circle, the encoder (203) checks the rolling path to obtain the circumference of the seamless steel pipe body (101), which is then converted into its diameter. S4. When the roller (201) encounters a surface defect of the seamless steel pipe body (101) during rolling, the force is applied to drive the liquid discharge component to operate so that the marking liquid is discharged onto the surface of the seamless steel pipe body (101), thereby marking the defect.

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