A bending degree laser measuring device for precision seamless welded steel pipe production

Abstract

The application discloses a bending degree laser measuring device for precision seamless welded steel pipe production and relates to the field of laser measuring instruments. A first driving hydraulic assembly is installed on the outer side of a preset base body, the output end of the first driving hydraulic assembly is connected with a transverse movable bearing, and the transverse movable bearing is nested and connected along the surface of the preset base body. The bending degree laser measuring device for precision seamless welded steel pipe production is provided with a center alignment positioning structure. The center alignment positioning structure is used for realizing center alignment type calibration detection processing on a contact pipe. Two groups of conical wedge-shaped reserved movable part limiting structures are symmetrically arranged at the two ends of the steel pipe. The first driving hydraulic assembly is used for pushing the two ends of the steel pipe to be close to each other. After the conical surface of the wedge-shaped reserved movable part is in contact with the inner hole of the end of the steel pipe, the geometric characteristics of the conical surface are used to adaptively push the center of the steel pipe to coincide with the rotation center of the wedge-shaped reserved movable part, and high-precision centering is realized.

Description

Technical Field

[0001] This invention relates to the field of laser measuring instrument technology, specifically to a laser measuring device for the bending degree of precision seamless welded steel pipe production. Background Technology

[0002] With the continuous improvement of laser inspection technology, it is widely used in various production and inspection industries. During the production process, steel pipes inevitably bend to a certain extent due to factors such as welding stress, uneven cooling, and straightening deviation. Excessive bending not only affects the subsequent pipe end processing and pipe-to-pipe assembly quality, but also makes it crucial to conduct high-precision and high-efficiency online inspection of steel pipe bending. For example, the patent with announcement number CN219810410U describes a tool for detecting the bending degree of steel pipes in slipform construction. The tool includes a main unit, a locking component, and a rail groove. One end of the locking component is fixedly connected to the steel pipe, and a rail parallel to the axial direction of the steel pipe is fixedly connected to the locking component. The main unit slides with the rail and has a pressure sensing structure and a distance measuring mechanism inside. The tool for detecting the bending degree of steel pipes in slipform construction can conveniently measure various surfaces of the steel pipe, is flexible and stable to use, and can effectively identify the chord height of the maximum bending position of the steel pipe through the pressure sensor. Furthermore, the laser distance measuring instrument can measure and calculate the bending degree of the steel pipe, enabling targeted and accurate measurement. For example, a patent with publication number CN104197854A describes a steel pipe bending measurement device, which includes: an inclined plane detection platform, a first laser emitter, a second laser emitter, a first photodetector, a second photodetector, and a control unit. When the steel pipe to be tested is axially straight, it will not produce bumps when rolling downwards, thus not blocking the light. Therefore, the light detection is continuous. However, when the steel pipe to be tested is not axially straight, it will produce bumps when rolling downwards, and some positions will be higher than the light, thus intermittently blocking the light. Therefore, the light detection is discontinuous. Thus, by judging the duration or frequency of the photodetector being blocked during the rolling process, the axial straightness of the steel pipe to be tested can be determined. For example, the patent with publication number CN223258887U discloses a device for detecting the straightness and curvature of a minimally invasive surgical forceps head. A rotating assembly is connected to the top of one end of the base; the axis of the laser beam of the first laser measuring instrument is perpendicular to the axis of the surgical forceps head under test in the initial state, and is used to detect the straightness of the surgical forceps head under test; the axis of the laser beam of the second laser measuring instrument is perpendicular to the axis of the forceps head under test in the set state, and is used to detect the curvature of the surgical forceps head under test; the surgical forceps fixing assembly is connected to the top of the other end of the base. Most of the aforementioned existing technologies improve the overall structure. However, in the process of operation, existing laser measurement equipment for bending of steel pipes has random deviations in the axial position of the steel pipe after placement, whether the steel pipe is rotated manually or supported by a simple V-block. The measurement reference of the laser measurement equipment is difficult to align precisely with the theoretical center line of the steel pipe. This centering deviation will lead to distorted measurement data and will not be able to truly reflect the actual bending shape of the steel pipe axis in space. Especially in batch inspection, the positioning deviation of each clamping further amplifies the measurement error, resulting in a large number of qualified steel pipes being misjudged as unqualified or unqualified products being missed during inspection. Summary of the Invention

[0003] The purpose of this invention is to provide a laser bending measurement device for the production of precision seamless welded steel pipes, in order to solve the problem mentioned in the background art that the measurement reference of the laser measurement device is difficult to accurately align with the theoretical center line of the steel pipe. This centering deviation will lead to distorted measurement data and cannot truly reflect the actual bending shape of the steel pipe axis in space. Especially in batch inspection, the positioning deviation of each clamping further amplifies the measurement error, resulting in a large number of qualified steel pipes being misjudged as unqualified or unqualified products being missed in inspection.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a laser measurement device for the curvature of precision seamless welded steel pipes, comprising a preset base, a first driving hydraulic assembly installed on the outer side of the preset base, and a transverse movable support component connected to the output end of the first driving hydraulic assembly, the transverse movable support component being nested and connected along the surface of the preset base; a wedge-shaped reserved movable component is nested and installed on the inner side of the upper end of the transverse movable support component, a second driving hydraulic assembly installed on the outer side of the transverse movable support component, the output end of the second driving hydraulic assembly being connected to a laser detection assembly, the laser detection assembly penetrating along the inner side of the wedge-shaped reserved movable component, and a center alignment positioning structure is provided between the transverse movable support component and the wedge-shaped reserved movable component, the center alignment positioning structure being used to achieve center alignment calibration and detection processing of the contact pipe.

[0005] Furthermore, the center alignment and positioning structure is provided with a docking transmission gear, and the docking transmission gear docks with the outer side of the shaft end of the wedge-shaped reserved movable part. A servo motor assembly is installed on the outer side of the transverse movable bearing part, and the outer side of the output end of the servo motor assembly is also docked with the docking transmission gear.

[0006] Furthermore, the wedge-shaped reserved movable component forms a rotating structure along the upper outer side of the transverse movable bearing component, and the wedge-shaped reserved movable component and the transverse movable bearing component are symmetrically distributed along the outer side of the preset base.

[0007] Furthermore, the wedge-shaped reserved movable component has a conical structure, and the wedge-shaped reserved movable component forms a transverse sliding structure along the surface of the preset base through a transverse movable bearing component.

[0008] Furthermore, an auxiliary bearing mechanism is provided on the outer side of the wedge-shaped reserved movable part, which provides auxiliary bearing and locking for the outer end of the pipe to be tested; the auxiliary bearing mechanism is provided with an abutting bearing member, which is nested and connected along the outer side of the wedge-shaped reserved movable part, and the lower end of the abutting bearing member is connected to a built-in liquid bladder assembly, which is located on the inner side of the wedge-shaped reserved movable part. A supply reserved hose is provided through the outer side of the built-in liquid bladder assembly, and the supply reserved hose passes through the inner side of the wedge-shaped reserved movable part.

[0009] Furthermore, a vertical guide groove is provided on the outer side of the wedge-shaped reserved movable part, and a vertical corrugated liquid bladder assembly is connected to the inner side of the vertical guide groove, and the vertical corrugated liquid bladder assembly is connected to the supply reserved hose.

[0010] Furthermore, a docking movable component is nested inside the vertical guide groove, and the docking movable component docks with the outer side of the vertical corrugated liquid bladder assembly, and the outer end of the docking movable component docks with an arc-shaped rubber component.

[0011] Furthermore, during the process of being pressed, the contact bearing member moves along the inner side of the wedge-shaped reserved movable member, and the contact bearing member applies pressure to the contacting built-in liquid bladder assembly simultaneously. The built-in liquid bladder assembly is connected to the vertical corrugated liquid bladder assembly through the supply reserved hose.

[0012] Furthermore, during the vertical expansion of the vertical corrugated liquid bladder assembly, it pushes the two sets of docking movable parts on the outside to move towards each other, and the arc-shaped rubber parts on the outside of the docking movable parts deform and support according to the pressure state.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This precision seamless welded steel pipe production bending laser measurement equipment is equipped with a center alignment positioning structure. The center alignment positioning structure achieves center alignment calibration and testing of the contact pipe fitting. Two sets of conical wedge-shaped reserved movable part limiting structures are symmetrically set at both ends of the steel pipe. The first driving hydraulic component pushes them closer to both ends of the steel pipe. After the conical surface of the wedge-shaped reserved movable part contacts the inner hole of the end of the steel pipe, the geometric characteristics of the conical surface adaptively push the center of the steel pipe to coincide with the rotation center of the wedge-shaped reserved movable part, completing high-precision centering. This ensures that the measurement reference of the steel pipe and the theoretical axis of the steel pipe are highly coincident before testing, without the need for manual intervention or complex electronic centering adjustment. This eliminates the centering deviation caused by the outer diameter tolerance and ellipticity of the steel pipe under traditional support methods. Furthermore, the laser detection component is installed at the center of the wedge-shaped pre-reserved movable part. After the conical wedge-shaped pre-reserved movable part completes the centering and positioning of the end of the steel pipe, the laser measuring equipment can extend and retract along the central axis of the wedge-shaped pre-reserved movable part to enter the inner cavity of the steel pipe for scanning and measurement. Throughout the process, the centering mechanism also serves as the measurement reference, ensuring that the measuring laser beam always coincides with the theoretical axis of the steel pipe, which greatly shortens the detection cycle of a single steel pipe and avoids the cumulative error introduced by multiple clamping. Furthermore, the outer side of the wedge-shaped pre-reserved movable part integrates a rotary drive mechanism. The servo motor assembly drives the wedge-shaped pre-reserved movable part to rotate along the upper circumference of the transverse movable bearing part through the transmission structure of the docking transmission gear. Thus, while the laser detection assembly moves along the axis of the steel pipe, it cooperates with the pipe in a locked rotating state to perform a 360° scan. This allows the laser detection assembly to scan along the inner wall of the steel pipe in a spiral trajectory, effectively covering any position on the entire inner wall surface of the pipe. This avoids the detection blind spots caused by the fixed measuring head or only linear movement. Combined with high-precision laser ranging, the three-dimensional axial shape of the inner hole of the steel pipe can be accurately reconstructed, thereby accurately calculating the curvature of any section along the entire pipe length. Furthermore, an auxiliary bearing mechanism is provided. This mechanism provides auxiliary bearing and locking to the outer end of the pipe fitting to be tested. As the pipe fitting contacts the wedge-shaped pre-reserved movable part, its pipe wall will contact the bearing part on the outside of the wedge-shaped pre-reserved movable part, causing it to be pressurized and apply pressure to the contacting built-in liquid bladder assembly. The built-in liquid bladder assembly is supplied through the reserved hose and the interior of the vertical corrugated liquid bladder assembly, causing the vertical corrugated liquid bladder assembly to expand vertically and push the two sets of docking movable parts on the outside to move towards each other. This, together with the arc-shaped rubber part on the outside of the docking movable part, deforms and supports according to the pressure state, thereby further ensuring the positioning strength and stability of the pipe fitting end and ensuring the accuracy of subsequent testing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the second driving hydraulic component of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the central part of the structure; Figure 4 This is a three-dimensional structural diagram of the laser detection component of the present invention; Figure 5 This is a three-dimensional structural diagram of the built-in liquid bladder assembly of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the arc-shaped rubber part of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the docking transmission gear of the present invention (half-section). Figure 8This is a three-dimensional structural diagram of the vertical corrugated liquid bladder assembly of the present invention; Figure 9 This is a three-dimensional structural diagram of the first driving hydraulic component of the present invention.

[0015] In the diagram: 1. Pre-set base; 2. First driving hydraulic assembly; 3. Lateral movable support component; 4. Wedge-shaped reserved movable component; 5. Laser detection assembly; 6. Second driving hydraulic assembly; 7. Connecting transmission gear; 8. Servo motor assembly; 9. Contact support component; 10. Built-in liquid bladder assembly; 11. Supply reserved hose; 12. Vertical guide groove; 13. Vertical corrugated liquid bladder assembly; 14. Connecting movable component; 15. Arc-shaped rubber component. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figures 1-9 This invention provides the following technical solution: a laser measurement device for the curvature of precision seamless welded steel pipes. To address the problem that the measurement reference of the laser measurement device is difficult to precisely align with the theoretical centerline of the steel pipe, this centering deviation leads to distorted measurement data, failing to accurately reflect the actual bending shape of the steel pipe axis in space. Especially in batch inspection, the positioning deviation of each clamping further amplifies the measurement error, causing a large number of qualified steel pipes to be misjudged as unqualified or unqualified products to be missed during inspection. The invention discloses a device comprising: a first driving hydraulic assembly 2 installed on the outer side of a preset base 1, and the first driving hydraulic assembly 2... The outlet end is connected to a transverse movable support 3, and the transverse movable support 3 is nested and connected along the surface of the preset base 1; a wedge-shaped reserved movable part 4 is nested and installed on the inner side of the upper end of the transverse movable support 3, a second driving hydraulic assembly 6 is installed on the outer side of the transverse movable support 3, and a laser detection assembly 5 is connected to the output end of the second driving hydraulic assembly 6, and the laser detection assembly 5 penetrates along the inner side of the wedge-shaped reserved movable part 4. A center alignment positioning structure is provided between the transverse movable support 3 and the wedge-shaped reserved movable part 4, and the center alignment positioning structure is used to achieve center alignment calibration and detection processing of the contact pipe.

[0018] The center alignment and positioning structure is equipped with a docking transmission gear 7, which docks with the outer side of the shaft end of the wedge-shaped reserved movable member 4. A servo motor assembly 8 is mounted on the outer side of the transverse movable support member 3, and the outer side of the output end of the servo motor assembly 8 is also docked with the docking transmission gear 7. The wedge-shaped reserved movable member 4 forms a rotating structure along the upper outer side of the transverse movable support member 3. The wedge-shaped reserved movable member 4 and the transverse movable support member 3 are symmetrically distributed along the outer side of the preset base 1. The wedge-shaped reserved movable member 4 has a conical structure, and it forms a transverse sliding structure along the surface of the preset base 1 via the transverse movable support member 3. The first driving fluid... The pressure component 2 pushes the steel pipe closer to both ends. After the conical surface of the wedge-shaped pre-reserved movable part 4 contacts the inner hole of the steel pipe end, it adaptively pushes the center of the steel pipe to coincide with the rotation center of the wedge-shaped pre-reserved movable part 4 using the geometric characteristics of the conical surface, thus completing high-precision centering. This ensures that the measurement reference of the steel pipe and the theoretical axis of the steel pipe are highly coincident before inspection, eliminating the need for manual intervention or complex electronic alignment adjustments. This eliminates the centering deviation caused by the outer diameter tolerance and ellipticity of the steel pipe under traditional support methods. Through the stroke control of the first drive hydraulic component 2, the conical wedge-shaped pre-reserved movable part 4 can adapt to steel pipes of different lengths, and the design of the cone angle of the conical wedge-shaped pre-reserved movable part 4 enables it to... Compatible with different pipe diameters, no mechanical centering components need to be replaced when changing inspection specifications, enhancing the equipment's flexible inspection capabilities. The laser inspection component 5 is centrally located in the wedge-shaped pre-reserved movable part 4. After the conical wedge-shaped pre-reserved movable part 4 completes the centering and positioning of the steel pipe end, the laser measuring equipment can extend and retract along the central axis of the wedge-shaped pre-reserved movable part 4 into the inner cavity of the steel pipe for scanning and measurement. Throughout the process, the centering mechanism also serves as the measurement reference, ensuring that the measuring laser beam always coincides with the theoretical axis of the steel pipe, significantly shortening the inspection cycle of a single steel pipe and avoiding the cumulative errors introduced by multiple clamping. The outer side of the wedge-shaped pre-reserved movable part 4 integrates... The rotary drive mechanism, with servo motor assembly 8 driving the wedge-shaped pre-reserved movable part 4 to rotate along the upper circumference of the transverse movable bearing part 3 via the transmission structure of the docking transmission gear 7, allows the laser detection assembly 5 to advance along the steel pipe axis while cooperating with the locked rotating pipe to perform a 360° scan. This enables the laser detection assembly 5 to scan along the inner wall of the steel pipe in a spiral trajectory, effectively covering any position on the entire inner wall surface of the pipe. This avoids blind spots caused by fixed measuring heads or only linear motion. Combined with high-precision laser ranging, the three-dimensional axial shape of the inner hole of the steel pipe can be accurately reconstructed, thereby accurately calculating the curvature of any section along the entire pipe length.

[0019] Example 2: Based on Example 1, an auxiliary support mechanism is also disclosed, the specific structure of which is as follows: An auxiliary bearing mechanism is provided on the outside of the wedge-shaped reserved movable part 4, which is used to lock the outer end of the pipe fitting to be tested. The auxiliary support mechanism is provided with a contact support member 9, which is nested and connected to the outer side of the wedge-shaped reserved movable member 4. The lower end of the contact support member 9 is connected to a built-in liquid bladder assembly 10, which is located inside the wedge-shaped reserved movable member 4. A supply reserved hose 11 is provided through the outer side of the built-in liquid bladder assembly 10, and the supply reserved hose 11 passes through the inner side of the wedge-shaped reserved movable member 4. A vertical guide groove 12 is provided on the outer side of the wedge-shaped reserved movable member 4, and a vertical corrugated liquid bladder assembly 13 is connected to the inner side of the vertical guide groove 12. The vertical corrugated liquid bladder assembly 13 and the supply reserved hose 11 are connected to each other. A docking movable member 14 is nested and installed inside the vertical guide groove 12, and the docking movable member 14 is connected to the outer side of the vertical corrugated liquid bladder assembly 13. The outer end of the docking movable member 14 is connected to an arc-shaped... During the process of being pressed, the rubber component 15 moves along the inner side of the wedge-shaped pre-reserved movable component 4, and the contact bearing component 9 simultaneously applies pressure to the contacting built-in liquid bladder assembly 10. The built-in liquid bladder assembly 10 is connected to the vertical corrugated liquid bladder assembly 13 through the supply pre-reserved hose 11. When the pipe contacts the wedge-shaped pre-reserved movable component 4, its pipe wall will press the contact bearing component 9 on the outer side of the wedge-shaped pre-reserved movable component 4, causing it to press the contacting built-in liquid bladder assembly 10. The built-in liquid bladder assembly 10 is supplied through the supply pre-reserved hose 11 and the interior of the vertical corrugated liquid bladder assembly 13, causing the vertical corrugated liquid bladder assembly 13 to expand vertically and push the two sets of docking movable components 14 on the outside to move towards each other. This, together with the arc-shaped rubber component 15 on the outside of the docking movable component 14, deforms and supports according to the pressure state, thereby further ensuring the calibrated strength and stability of the pipe end side.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] 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 laser measurement device for bending degree of precision seamless welded steel pipe production, comprising a preset base (1), wherein a first driving hydraulic component (2) is installed on the outside of the preset base (1), and a transverse movable bearing component (3) is connected to the output end of the first driving hydraulic component (2), and the transverse movable bearing component (3) is nested and connected along the surface of the preset base (1). Its features are: The upper inner side of the transverse movable support (3) is nested with a wedge-shaped reserved movable part (4), the outer side of the transverse movable support (3) is equipped with a second driving hydraulic assembly (6), and the output end of the second driving hydraulic assembly (6) is connected to a laser detection assembly (5). The laser detection assembly (5) passes through the inner side of the wedge-shaped reserved movable part (4). A center alignment positioning structure is provided between the transverse movable support (3) and the wedge-shaped reserved movable part (4). The center alignment positioning structure is used to perform center alignment calibration and detection processing on the contact pipe.

2. The laser bending measurement device for precision seamless welded steel pipe production according to claim 1, characterized in that: The center alignment and positioning structure is provided with a docking transmission gear (7), and the docking transmission gear (7) docks with the outer side of the shaft end of the wedge-shaped reserved movable part (4). The outer side of the transverse movable bearing part (3) is equipped with a servo motor assembly (8), and the outer side of the output end of the servo motor assembly (8) is also docked with the docking transmission gear (7).

3. The laser bending measurement device for precision seamless welded steel pipe production according to claim 2, characterized in that: The wedge-shaped reserved movable part (4) forms a rotating structure along the upper outer side of the transverse movable bearing part (3), and the wedge-shaped reserved movable part (4) and the transverse movable bearing part (3) are symmetrically distributed along the outer side of the preset base (1).

4. The laser measurement equipment for bending degree in the production of precision seamless welded steel pipes according to claim 3, characterized in that: The wedge-shaped reserved movable part (4) has a conical structure, and the wedge-shaped reserved movable part (4) forms a transverse sliding structure along the surface of the preset base (1) through the transverse movable bearing part (3).

5. The laser bending measurement device for precision seamless welded steel pipe production according to claim 4, characterized in that: An auxiliary bearing mechanism is provided on the outside of the wedge-shaped reserved movable part (4), and the outer end of the pipe fitting to be tested is locked by the auxiliary bearing mechanism. The auxiliary bearing mechanism is provided with a contact bearing (9), and the contact bearing (9) is nested and connected along the outside of the wedge-shaped reserved movable part (4), and the lower end of the contact bearing (9) is connected to the built-in liquid bladder assembly (10), and the built-in liquid bladder assembly (10) is located on the inside of the wedge-shaped reserved movable part (4). The outside of the built-in liquid bladder assembly (10) is provided with a supply reserved hose (11), and the supply reserved hose (11) passes through the inside of the wedge-shaped reserved movable part (4).

6. The laser bending measurement device for precision seamless welded steel pipe production according to claim 5, characterized in that: The wedge-shaped reserved movable part (4) has a vertical guide groove (12) on its outer side, and a vertical corrugated liquid bladder assembly (13) is connected to the inner side of the vertical guide groove (12), and the vertical corrugated liquid bladder assembly (13) is connected to the supply reserved hose (11).

7. The laser measurement device for bending degree in the production of precision seamless welded steel pipes according to claim 6, characterized in that: The vertical guide groove (12) is nested with a docking movable part (14), and the docking movable part (14) is docked with the outer side of the vertical corrugated liquid bladder assembly (13), and the outer end of the docking movable part (14) is docked with an arc-shaped rubber part (15).

8. The laser bending measurement device for precision seamless welded steel pipe production according to claim 7, characterized in that: During the process of being pressed, the contact bearing (9) moves along the inner side of the wedge-shaped reserved movable part (4), and the contact bearing (9) applies pressure to the contacting built-in liquid bladder assembly (10) simultaneously. The built-in liquid bladder assembly (10) is connected to the vertical corrugated liquid bladder assembly (13) through the supply reserved hose (11).

9. The laser bending measurement device for precision seamless welded steel pipe production according to claim 8, characterized in that: During the vertical expansion of the vertical corrugated liquid bladder assembly (13), it pushes the two sets of docking movable parts (14) on the outside to move towards each other, and the arc-shaped rubber part (15) on the outside of the docking movable part (14) deforms and supports according to the pressure state.

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