A dimensional inspection device for alloy steel pipes

Abstract

This utility model discloses a dimension inspection device for alloy steel pipes, including a regular octagonal outer shell, an inner octagonal shell fixed in the middle of the outer shell, a first rotating shaft rotatably mounted between the outer and inner shells via a bearing, a first bevel gear fixed inside the inner shell at one end of the first rotating shaft, a second bevel gear meshing with the top of one side of the first bevel gear, and a second rotating shaft rotatably mounted at the center of the top of the outer shell via a bearing. This dimension inspection device for alloy steel pipes, by rotating a handwheel and utilizing a bevel gear transmission and threaded transmission structure, can quickly drive the rollers at the ends of eight movable cylinders to simultaneously approach the inner or outer wall of the alloy steel pipe, achieving rapid detection of the roundness of the inner and outer diameters of the steel pipe. Compared with existing devices, this significantly shortens the inspection time and greatly improves the inspection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of alloy steel pipe measurement technology, specifically to a size detection device for alloy steel pipes. Background Technology

[0002] Alloy steel pipes, with their high strength and corrosion resistance, are widely used in many fields such as petrochemicals, power transmission, and machinery manufacturing. During the production process of alloy steel pipes, errors in processing techniques such as rolling and drawing, or the inherent properties of the material itself, can easily cause non-circular deformations in the inner and outer diameters of the pipes, such as elliptical shapes, localized depressions, or bulges. The roundness of the inner and outer diameters of the steel pipe is one of the key indicators for measuring its quality. If the roundness does not meet the standards, it will not only affect the assembly accuracy of the steel pipe with other components, leading to loose connections or inability to assemble properly, but it will also cause stress concentration under pressure, reducing the pressure-bearing capacity of the steel pipe, seriously threatening the safe operation of equipment, and affecting the overall performance of the product. Currently, most existing alloy steel pipe dimensional inspection devices on the market suffer from problems such as complex operation and low inspection efficiency. Some devices rely on complex automated inspection systems, which are costly and difficult to maintain; while some manual inspection devices are unable to quickly and accurately inspect the roundness of the inner and outer diameters of alloy steel pipes. Operators often need to adjust the testing position multiple times and use various measuring tools, consuming a significant amount of time and effort. This not only severely impacts production efficiency and increases production costs for enterprises, but also fails to meet the demands of modern industrial production for rapid product quality testing. Therefore, it is urgent to develop a device that is simple in structure, easy to operate, and capable of quickly and manually testing the roundness of the inner and outer diameters of alloy steel pipes. Summary of the Invention

[0003] The purpose of this invention is to provide a size detection device for alloy steel pipes to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a dimension detection device for alloy steel pipes, comprising an octagonal outer shell, an octagonal inner shell fixed in the middle of the octagonal outer shell, a first rotating shaft rotatably mounted between the octagonal outer shell and the octagonal inner shell via a bearing, a first bevel gear fixed at one end of the first rotating shaft inside the octagonal inner shell, a second bevel gear meshing with the top of one side of the first bevel gear, a second rotating shaft rotatably mounted at the center of the top of the octagonal outer shell via a bearing, the lower end of the second rotating shaft being fixedly connected to the center of the top of the second bevel gear, a movable cylinder fitting against the outer side of the octagonal outer shell, and a threaded hole being provided inside the movable cylinder, with the end of the first rotating shaft threaded into the threaded hole, a limit mechanism provided between the octagonal outer shell and the movable cylinder, and a support mechanism provided at the end of the movable cylinder.

[0005] Preferably, the support mechanism includes a movable plate, the end of the movable cylinder is fixed with the movable plate, and the interior of the movable plate is rotatably connected to one end of the roller via a bearing.

[0006] Preferably, a handwheel is fixed at the upper end of the second rotating shaft above the regular octagonal outer shell.

[0007] Preferably, a supporting hollow tube is fixed at the center of the top of the regular octagonal shell, and the inner side of the upper end of the supporting hollow tube is rotatably connected to the outer side of the second rotating shaft through a bearing.

[0008] Preferably, the outer wall of the supporting hollow tube is fixed with an anti-slip rubber sleeve.

[0009] Preferably, the limiting mechanism includes limiting holes, and limiting holes are provided on both sides of the threaded hole inside the movable cylinder. A "T"-shaped limiting rod is slidably installed inside the limiting hole, and the end of the limiting rod passes through the inside of the limiting hole and is fixedly connected to the outer wall of the regular octagonal shell.

[0010] Preferably, the first rotating shaft, the first bevel gear, the movable cylinder, the limiting mechanism, and the supporting mechanism are all distributed at equal angles about the central axis of the second bevel gear.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the alloy steel pipe size detection device, by rotating the handwheel, utilizes the bevel gear transmission and thread transmission structure to quickly drive the rollers at the ends of the eight movable cylinders to simultaneously approach the inner or outer wall of the alloy steel pipe, thereby realizing rapid detection of the roundness of the inner and outer diameters of the steel pipe. Compared with the existing devices, it greatly shortens the detection time and significantly improves the detection efficiency.

[0012] It adopts a purely manual operation mode, without the need for complex automated equipment and professional operating skills. Operators can complete the testing operation simply by turning the handwheel, which reduces the difficulty of operation, is convenient and quick, and is suitable for various production scenarios.

[0013] The design of the regular octagonal outer shell and inner shell, as well as the stable support of the hollow tube for the second rotating shaft, enhances the overall structural strength and stability of the device; the limiting mechanism effectively restricts the rotation of the movable cylinder, ensuring the accuracy of the movement of each component during the testing process and improving the reliability of the test results.

[0014] Eight evenly distributed rollers simultaneously inspect the alloy steel pipe from multiple angles, comprehensively reflecting the roundness of the pipe's inner and outer diameters. Compared to single-point or few-point inspection methods, the inspection results are more accurate and reliable, helping to promptly identify quality problems in the steel pipe and ensuring product quality. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the top structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the bottom cross-sectional structure of this utility model;

[0018] Figure 4 This is a cross-sectional view of the movable cylinder structure of this utility model;

[0019] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0020] Figure 6 This is a schematic cross-sectional view of the second rotating shaft of this utility model;

[0021] Figure 7 This is a schematic diagram of the separation structure of the first rotating shaft and the movable cylinder of this utility model.

[0022] In the diagram: 1. Regular octagonal outer shell; 2. Regular octagonal inner shell; 3. First rotating shaft; 4. First bevel gear; 5. Second bevel gear; 6. Second rotating shaft; 7. Handwheel; 8. Support hollow tube; 9. Anti-slip rubber sleeve; 10. Movable cylinder; 11. Threaded hole; 12. Limiting hole; 13. Limiting rod; 14. Movable plate; 15. Roller. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-7This utility model provides a technical solution: a size detection device for alloy steel pipes, including a regular octagonal outer shell 1, and a regular octagonal inner shell 2 fixed in the middle of the regular octagonal outer shell 1. The design of the regular octagonal outer shell 1 and the regular octagonal inner shell 2 forms a stable frame structure, enhances the overall rigidity of the device, effectively resists external collisions and external forces during the detection process, avoids device deformation, and ensures the stability and accuracy of the detection. At the same time, the regular octagonal structure facilitates the symmetrical layout and installation of internal components, which is beneficial to the uniform stress on each component and extends the service life of the device. The regular octagonal outer shell 1 and the regular octagonal inner shell 2 are rotatably mounted via bearings. There is a first rotating shaft 3. One end of the first rotating shaft 3 is located inside the regular octagonal inner shell 2 and a first bevel gear 4 is fixed thereon. A second bevel gear 5 is meshed with the top of one side of the first bevel gear 4. A second rotating shaft 6 is rotatably mounted at the center of the top of the regular octagonal outer shell 1 through a bearing. The lower end of the second rotating shaft 6 is fixedly connected to the center of the top of the second bevel gear 5. A movable cylinder 10 is attached to the outside of the regular octagonal outer shell 1. A threaded hole 11 is opened inside the movable cylinder 10. The end of the first rotating shaft 3 is threaded into the inside of the threaded hole 11. A limit mechanism is provided between the regular octagonal outer shell 1 and the movable cylinder 10. A support mechanism is provided at the end of the movable cylinder 10.

[0025] The support mechanism includes a movable plate 14, which is fixed to the end of the movable cylinder 10. The interior of the movable plate 14 is rotatably connected to one end of the roller 15 via a bearing. The roller 15 is connected to the movable plate 14 via the bearing, allowing the roller 15 to rotate flexibly. When in contact with the surface of the alloy steel pipe, it can rotate with the shape change of the steel pipe surface, reducing friction with the steel pipe surface and avoiding scratches on the steel pipe surface. At the same time, the flexible rotation of the roller 15 helps to more accurately reflect the shape information of the steel pipe surface and improve the accuracy of roundness detection.

[0026] The upper end of the second rotating shaft 6 is fixed with a handwheel 7 above the regular octagonal outer shell 1. The handwheel 7 provides the operator with a convenient force application component. By rotating the handwheel 7, the second rotating shaft 6 can be easily driven to rotate, thereby driving the entire device to operate and realizing the function of manual detection.

[0027] A supporting hollow tube 8 is fixed at the center of the top of the regular octagonal shell 1. The inner side of the upper end of the supporting hollow tube 8 is rotatably connected to the outer side of the second rotating shaft 6 through a bearing. The supporting hollow tube 8 provides a stable support structure for the second rotating shaft 6, enhances the stability of the second rotating shaft 6 during rotation, prevents the second rotating shaft 6 from shaking or deviating when subjected to force, and ensures the accuracy of power transmission. At the same time, the hollow design reduces the overall weight of the device, making it easier to transport and operate. The use of bearings further reduces the friction between the second rotating shaft 6 and the supporting hollow tube 8, making the rotation smoother.

[0028] The outer wall of the supporting hollow tube 8 is fixed with an anti-slip rubber sleeve 9. The anti-slip rubber sleeve 9 increases the friction when the operator holds the supporting hollow tube 8, preventing the hand from slipping during operation and improving the safety of operation.

[0029] The limiting mechanism includes limiting holes 12. Limiting holes 12 are provided on both sides of the threaded hole 11 inside the movable cylinder 10. A "T"-shaped limiting rod 13 is slidably installed inside the limiting hole 12. The end of the limiting rod 13 passes through the inside of the limiting hole 12 and is fixedly connected to the outer wall of the regular octagonal shell 1. The cooperation of the limiting hole 12 and the limiting rod 13 forms a reliable limiting structure, which effectively restricts the rotational freedom of the movable cylinder 10 and ensures that the movable cylinder 10 can only move along the axial direction of the first rotating shaft 3. This ensures the accuracy of the movement of each component during the detection process and also avoids the separation between the first rotating shaft 3 and the movable cylinder 10.

[0030] The first rotating shaft 3, the first bevel gear 4, the movable cylinder 10, the limiting mechanism, and the support mechanism are all distributed at equal angles about the central axis of the second bevel gear 5. This symmetrical structural design allows for simultaneous inspection of the alloy steel pipe from eight directions. Compared to single-point or a few-point inspection, it can more comprehensively reflect the roundness of the inner and outer diameters of the alloy steel pipe, significantly improving the accuracy and reliability of the inspection results. At the same time, the coordinated work of multiple components enables rapid completion of the inspection, improving inspection efficiency and meeting the demand for rapid inspection in industrial production.

[0031] Working Principle: When using this alloy steel pipe dimensional inspection device, first place the alloy steel pipe to be tested horizontally on the workbench, ensuring the pipe is stable. The operator holds the anti-slip rubber sleeve 9 on the supporting hollow tube 8 and places the entire device at one end of the alloy steel pipe. Through visual inspection or simple calibration, the octagonal outer shell 1 is roughly positioned at the center of the pipe opening to ensure the accuracy of the inspection. Next, the operator turns the handwheel 7, which drives the second rotating shaft 6 to rotate. The second bevel gear 5 at the lower end of the second rotating shaft 6 rotates synchronously. Since the eight first bevel gears 4 are evenly distributed and mesh with the second bevel gear 5, driven by the rotation of the second bevel gear 5, the eight first bevel gears 4 will rotate simultaneously and synchronously, thereby driving the first rotating shaft 3, which is fixedly connected to the first bevel gears 4, to rotate.

[0032] Because the end of the first rotating shaft 3 is threaded into the threaded hole 11 of the movable cylinder 10, and the limiting rod 13 in the limiting mechanism can slide freely within the limiting hole 12, this structural design restricts the rotational freedom of the movable cylinder 10, allowing it to move only along the axial direction of the first rotating shaft 3. Therefore, when the first rotating shaft 3 rotates, under the action of the threaded transmission, the movable cylinder 10 will move smoothly along the axial direction of the first rotating shaft 3, and the rollers 15 at the ends of the eight movable cylinders 10 will gradually approach the inner wall of the alloy steel pipe. As the movable cylinder 10 continues to move, the rollers 15 will eventually fit tightly against the inner wall of the alloy steel pipe.

[0033] At this point, the eight rollers 15 are evenly distributed on the circumference of the inner wall of the alloy steel pipe, forming a multi-point contact detection of the inner wall of the steel pipe. If the inner diameter of the alloy steel pipe is a standard circle, according to the geometric characteristics of a circle, the distance between each roller 15 and the center of the regular octagonal outer shell 1 should be exactly equal; if the inner diameter of the alloy steel pipe has non-circular deformations such as elliptic, then the distance between each roller 15 and the center of the regular octagonal outer shell 1 will differ. Operators can use measuring tools such as vernier calipers and micrometers to accurately measure the distance between each roller 15 and the center of the regular octagonal outer shell 1, or by observing whether there is a significant gap between the roller 15 and the pipe wall, to quickly and accurately determine whether the roundness of the inner diameter of the alloy steel pipe meets the standard requirements.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting the size of an alloy steel pipe, comprising a regular octagonal outer shell (1), a regular octagonal inner shell (2) fixed in the middle of the regular octagonal outer shell (1), characterized in that: A first rotating shaft (3) is rotatably mounted between the regular octagonal outer shell (1) and the regular octagonal inner shell (2) via a bearing. One end of the first rotating shaft (3) is fixed inside the regular octagonal inner shell (2) with a first bevel gear (4). A second bevel gear (5) meshes with the top of one side of the first bevel gear (4). A second rotating shaft (6) is rotatably mounted at the center of the top of the regular octagonal outer shell (1) via a bearing. The lower end of the second rotating shaft (6) is fixedly connected to the center of the top of the second bevel gear (5). A movable cylinder (10) is attached to the outside of the regular octagonal outer shell (1), and a threaded hole (11) is provided inside the movable cylinder (10). The end of the first rotating shaft (3) is threaded into the inside of the threaded hole (11). A limit mechanism is provided between the regular octagonal outer shell (1) and the movable cylinder (10). A support mechanism is provided at the end of the movable cylinder (10).

2. The apparatus for detecting the size of an alloy steel pipe according to claim 1, wherein: The support mechanism includes a movable plate (14), and the movable plate (14) is fixed at the end of the movable cylinder (10). The interior of the movable plate (14) is rotatably connected to one end of the roller (15) through a bearing.

3. The apparatus for detecting the size of an alloy steel pipe according to claim 2, wherein: The upper end of the second rotating shaft (6) is fixed with a handwheel (7) above the regular octagonal outer shell (1).

4. The apparatus for detecting the size of an alloy steel pipe according to claim 3, wherein: A supporting hollow tube (8) is fixed at the center of the top of the regular octagonal shell (1), and the inner side of the upper end of the supporting hollow tube (8) is rotatably connected to the outer side of the second rotating shaft (6) through a bearing.

5. The apparatus for detecting the size of an alloy steel pipe according to claim 4, wherein: The outer wall of the supporting hollow tube (8) is fixed with an anti-slip rubber sleeve (9).

6. The apparatus for detecting the size of an alloy steel pipe according to claim 5, wherein: The limiting mechanism includes a limiting hole (12). The movable cylinder (10) has limiting holes (12) on both sides of the threaded hole (11). A "T"-shaped limiting rod (13) is slidably installed inside the limiting hole (12). The end of the limiting rod (13) passes through the inside of the limiting hole (12) and is fixedly connected to the outer wall of the regular octagonal shell (1).

7. The apparatus for detecting the size of an alloy steel pipe according to claim 6, wherein: The first rotating shaft (3), the first bevel gear (4), the movable cylinder (10), the limiting mechanism and the support mechanism are all distributed at equal angles about the central axis of the second bevel gear (5).

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