A pressure self-compensating flattening machine for large-diameter thick-wall spiral welded pipes

Abstract

The application discloses a pressure self-compensating flattening machine for large-diameter thick-wall spiral welded pipes, and relates to the field of welded pipe machining.The pressure self-compensating flattening machine for large-diameter thick-wall spiral welded pipes comprises a preset base body, a transmission butt joint roller is rotationally connected to the upper end of the preset base body, the transmission butt joint roller is butted to a driving motor in the equipment through a synchronous belt, an external butt joint piece is butted to the outer side of the transmission butt joint roller, a guide butt joint rod is rotationally connected to the outer side of the external butt joint piece, and a transverse movable piece is nestedly installed at the front end of the preset base body.The pressure self-compensating flattening machine for large-diameter thick-wall spiral welded pipes avoids the traditional direct guiding type workpiece transmission work, cooperates with a subsequent pressure adjusting structure, can accurately perform thickness preliminary detection on different regions of the workpiece, guarantees the overall plate flattening precision, avoids that the thickness difference of the head and tail regions is too high, and breaks through the key links of plate flattening precision control, special equipment structure and the like, and realizes stable output of the wall thickness steel pipe through the establishment of a high-precision pressure regulation and control system.

Description

Technical Field

[0001] This invention relates to the field of welded pipe processing technology, specifically to a pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes. Background Technology

[0002] In the production process of large-diameter spiral welded pipes, the steel plates after uncoiling need to be leveled in order to smoothly carry out subsequent rounding and welding operations.

[0003] For example, Chinese patent CN216606722U discloses a device for a large-diameter thick-walled spiral welded pipe leveling machine. This device addresses the shortcomings of existing spiral welded pipe leveling machines that require separate power mechanisms to drive the upper or lower roller groups. The spiral welded pipe leveling machine includes: a frame; an upper roller group mounted on and fixed to the frame; a lower roller group; and a passive lifting assembly mounted on the frame, connected to and located below the lower roller group. During leveling, the steel plate presses against the lower roller group, and simultaneously, the passive lifting assembly is also pressed, generating an upward force to achieve leveling.

[0004] For example, Chinese patent CN219093198U discloses a device for a steel plate straightening machine for welded pipe processing. The device includes a frame and a guide frame. Limiting components for constraining the steel plate are installed at both the front and rear ends of the guide frame. These components can clamp and constrain steel plates of different sizes. The guide frame includes a toothed plate with a T-shaped guide rod fixedly connected to its upper end. This allows the toothed plate to move left and right, and the movement of the toothed plate moves the limiting components, thus adjusting the distance between the limiting components and upstream or downstream equipment on the frame. The limiting components move with the steel plate, supporting it and reducing the risk of bending due to improper spacing between equipment. The device is simple to operate and easy to use.

[0005] Most of the existing technologies mentioned above improve the overall structure. However, the existing leveling machines for large-diameter thick-walled spiral welded pipes mostly use direct-guided workpiece transmission during operation. The transmitted workpiece cannot be effectively kept in the center during continuous transmission, which leads to deviations during the leveling process due to inaccurate transmission angles. Although some companies have implemented automation, key aspects such as dynamic pressure control and precise matching are still in the experimental stage, resulting in insufficient pass rates for thick-walled pipes and thus certain limitations in their use. Summary of the Invention

[0006] The purpose of this invention is to provide a pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes, in order to solve the problems mentioned in the background art, which mostly involve direct-guided workpiece transfer. Although some enterprises have implemented automation, the transferred workpieces cannot be effectively kept in a centered state for continuous transfer. This leads to the phenomenon of deviation during the leveling process due to inaccurate transfer angles. However, key aspects such as dynamic pressure control and precise matching are still in the experimental stage, resulting in insufficient pass rates for thick-walled pipes and certain limitations in application.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A pressure-compensating leveling machine for large-diameter thick-walled spiral welded pipes includes a preset base. A transmission docking roller is rotatably connected to the upper end of the preset base, and the transmission docking roller is connected to a drive motor inside the equipment via a synchronous belt. An external docking component is docked to the outer side of the transmission docking roller, and a guide docking rod is rotatably connected to the outer side of the external docking component. A transverse movable component is nested at the front end of the preset base, and the outer side of the transverse movable component is connected to the outer side of the guide docking rod. A guide center positioning structure is provided at the inner end of the transverse movable component, and the guide center positioning structure is used to assist in the straightening of the transmitted material.

[0009] Furthermore, the guiding center positioning structure is provided with an abutting docking member, and the abutting docking member is fixedly docked to the surface of the preset base. The inner side of the transverse movable member is provided with a vertical sliding groove, and an internal guide is nested inside the vertical sliding groove. The lower end of the internal guide is fixedly connected to a first spring, and the first spring is docked with the inner side of the vertical sliding groove.

[0010] Furthermore, a transverse positioning component is nested inside the built-in guide, and a second spring is fixedly connected to the lower end of the transverse positioning component. The second spring and the inner side of the built-in guide are connected to each other. A connecting steel wire rope component is connected to the outer side of the lower end of the transverse positioning component, and the connecting steel wire rope component passes through the inner side of the built-in guide. At the same time, the end of the connecting steel wire rope component is connected to the lower end of the transverse movable component.

[0011] Furthermore, the transmission docking roller drives the external docking component to rotate synchronously, and the external docking component drives the transverse movable component to form a transverse movable structure along the outside of the preset base through the guide docking rod. When the transverse movable component moves to contact the abutting docking component, the built-in guide on its inner side is stretched by force to move the first spring vertically.

[0012] Furthermore, as the built-in guide moves vertically along the inner side of the transverse movable member, the docking steel wire rope component fixed at the end position will be forced to move the transverse positioning member inward along the interior of the built-in guide member, and the transverse positioning member has an arc-shaped structure when viewed from above.

[0013] Furthermore, a pressure adjustment structure is provided on the inner side of the transverse movable component, which controls and adjusts the pressure of different areas of the workpiece to be processed accordingly. The pressure adjustment structure is provided with a pressure sensor assembly, which is nested and installed on the inner side of the upper end of the transverse movable component. A stop nesting component is nested on the upper end of the transverse movable component, and a third spring is fixedly connected to the outer side of the stop nesting component, and the third spring is connected to the transverse movable component.

[0014] Furthermore, a ranging sensor is installed at the upper end of the abutting nested component, a driving push rod is installed on the outer side of the upper end of the preset base, and a docking reserved roller is nested on the inner side of the upper end of the preset base. The upper end of the docking reserved roller is docked with the output end of the driving push rod, and the electrical signal driving receiving end of the driving push rod is electrically connected to the signal conversion and transmission end of the ranging sensor and pressure sensor assembly.

[0015] Furthermore, when the built-in guide pushes the contacting material vertically along the inner side of the transverse movable member, the evenly distributed abutting nesting members are stretched by force, and the third spring moves upward along the inner side of the transverse movable member. The abutting nesting members are evenly and equally distributed about the center point of the transverse movable member.

[0016] Furthermore, the docking reserved roller moves vertically along the upper end of the preset base, and the positions of the docking reserved roller and the transmission docking roller correspond to each other.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This pressure-compensated leveling machine for large-diameter thick-walled spiral welded pipes is equipped with a guide center positioning structure. This structure assists in the straightening of the transported material. As the material is guided along the inner side of the transverse movable part, the external docking part rotates with the drive docking roller, driving the transverse movable part carrying the workpiece inwards via the guide docking rod. As the transverse movable part moves to the upper end of the docking part, the internal guide part, under pressure, moves upwards vertically, thus promoting a locked, fixed-distance transmission between the workpiece and the transverse movable part. This avoids the traditional direct-guided workpiece transmission method. Combined with a subsequent pressure adjustment structure, it allows for precise preliminary thickness detection of different areas of the workpiece, ensuring overall plate straightening accuracy and preventing excessive thickness differences between the beginning and end areas. The overall design focuses on breakthroughs in plate straightening accuracy control and specialized equipment structure, achieving stable production of thick-walled steel pipes through the establishment of a high-precision pressure control system.

[0019] Furthermore, during the process of the built-in guide carrying the workpiece upward along the inner side of the transverse movable part for fixed-distance transmission, the arc-shaped transverse positioning part will be displaced inward along the inside of the built-in guide by the end-fixed docking steel wire rope component. This, together with the two sets of opposing transverse positioning parts, achieves a centering and self-limiting transmission effect for the contacting workpiece. This ensures that the transmitted workpiece can be continuously transmitted while maintaining its center position, preventing the phenomenon of deviation due to inaccurate transmission angle during the leveling process. By improving the uniformity of plate leveling, ensuring the stability of the welding process, and enhancing the reliability of equipment operation, the consistency and pass rate of thick-walled pipe products can be significantly improved.

[0020] Furthermore, a pressure regulating structure is provided to control and adjust the pressure in different areas of the workpiece. During the fixed-distance auxiliary conveying of the workpiece driven by the lateral moving part and the built-in guide, the upward-moving workpiece will simultaneously apply pressure to multiple abutting nested parts inside the lateral moving part. This causes the workpiece to move upward according to its flatness until it contacts the pressure sensor assembly. At this point, depending on the convex or concave state of the workpiece surface, the corresponding abutting nested parts will move to apply pressure to the pressure sensor assembly. However, the abutting nested parts in contact with the concave parts of the workpiece surface will move to a limited height and will not contact the pressure sensor assembly. When the contact force is relatively small, the pressure sensor assembly calculates the pressure signal generated by the highest protrusion of the workpiece and transmits the signal to the single-chip microcomputer signal drive receiver of the drive push rod. This drives the corresponding drive push rod to increase the downward movement distance of the pre-reserved roller at the end of the drive push rod according to the thickness of the workpiece. This allows it to apply greater pressure to the surface of the transmitted workpiece, ensuring that the leveling pressure generated by the equipment is maintained under different thickness conditions. This allows the equipment to continuously apply pressure to different positions of the transmitted workpiece, achieving dynamic control, establishing a leveling method for thick-walled plates, solving the problem of uneven thickness in different areas, and improving the practicality of the device. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the pre-designed substrate of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the drive push rod of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the pre-reserved roller for docking in this invention.

[0025] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the central part of the structure;

[0026] Figure 6 This is a three-dimensional structural diagram of the external docking component of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the guide docking rod of the present invention;

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the nested component of the present invention;

[0029] Figure 9 This is a schematic diagram of the three-dimensional structure of the first spring of the present invention;

[0030] Figure 10This is a schematic diagram of the half-section three-dimensional structure of the transverse movable component of the present invention;

[0031] Figure 11 This is a three-dimensional structural diagram of the built-in guide of the present invention.

[0032] In the diagram: 1. Pre-set base; 2. Drive docking roller; 3. External docking component; 4. Guide docking rod; 5. Lateral movable component; 6. Abutting docking component; 7. Internal guide component; 8. Vertical slide groove; 9. First spring; 10. Lateral positioning component; 11. Second spring; 12. Dock wire rope component; 13. Pressure sensor assembly; 14. Third spring; 15. Abutting nesting component; 16. Drive push rod; 17. Dock reserved roller; 18. Distance sensor. Detailed Implementation

[0033] 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.

[0034] Example 1: Please refer to Figures 1-11 This invention provides the following technical solution: a pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes. To address the technical problem that most workpiece transfer operations are directly guided, and the transferred workpieces cannot be effectively kept centered during continuous transfer, leading to deviations during leveling due to inaccurate transfer angles, the invention discloses a transmission docking roller 2 rotatably connected to the upper end of a pre-set base 1. The transmission docking roller 2 is connected to a drive motor inside the equipment via a synchronous belt. An external docking component 3 is docked to the outer side of the transmission docking roller 2, and a guide docking rod 4 is rotatably connected to the outer side of the external docking component 3. A transverse movable component 5 is nested at the front end of the pre-set base 1, and the outer side of the transverse movable component 5 is docked to the outer side of the guide docking rod 4. A guide center positioning structure is provided at the inner end of the transverse movable component 5, which assists in the correction of the transferred material.

[0035] The guiding center positioning structure is equipped with a contact docking component 6, which is fixedly docked to the surface of the preset base 1. A vertical groove 8 is provided on the inner side of the transverse movable component 5, and an internal guide component 7 is nested inside the vertical groove 8. A first spring 9 is fixedly connected to the lower end of the internal guide component 7, and the first spring 9 docks with the inner side of the vertical groove 8. A transverse positioning component 10 is nested inside the internal guide component 7, and a second spring 11 is fixedly connected to the lower end of the transverse positioning component 10, and the second spring 11 docks with the inner side of the internal guide component 7. A docking wire rope component 12 is docked to the outer side of the lower end of the transverse positioning component 10, and the docking wire rope component 12 passes through the inner side of the internal guide component 7. The end of the connecting wire rope component 12 is connected to the lower end of the transverse movable component 5. The transmission connecting roller 2 drives the external connecting component 3 to rotate synchronously. The external connecting component 3, through the guide connecting rod 4, drives the transverse movable component 5 to form a transverse movable structure along the outer side of the preset base 1. When the transverse movable component 5 moves to contact the contacting connecting component 6, the built-in guide 7 on its inner side is stretched by the force and the first spring 9 moves vertically. During the process of the built-in guide 7 moving vertically along the inner side of the transverse movable component 5, the connecting wire rope component 12, whose end position is fixed, will be forced to move the transverse positioning component 10 inward along the interior of the built-in guide 7. The transverse positioning component 10 has an arc-shaped structure when viewed from above. The material is transferred along the inner side of the transverse movable component 5. During the guiding process, the external docking component 3, along with the rotation of the transmission docking roller 2, drives the transverse movable component 5 carrying the workpiece to move inward via the guide docking rod 4. As the transverse movable component 5 moves to the upper end of the docking component 6, the internal guide component 7, under pressure, will simultaneously move upward vertically, thereby promoting a locked, fixed-distance transmission between the workpiece and the transverse movable component 5. This avoids the traditional direct-guided workpiece transmission process. Combined with the subsequent pressure adjustment structure, it allows for precise preliminary thickness detection of different areas of the workpiece, ensuring overall sheet metal leveling accuracy and preventing excessive thickness differences between the beginning and end areas. The overall breakthrough focuses on core aspects such as sheet metal leveling accuracy control and specialized equipment structure. A high-precision pressure control system is established to achieve stable production of thick-walled steel pipes. During the process of the built-in guide 7 carrying the workpiece upward and guiding it at a fixed distance along the inner side of the transverse movable part 5, the arc-shaped transverse positioning part 10 will be displaced inward along the inside of the built-in guide 7 by the force through the docking wire rope part 12 fixed at the end position. This, together with the two sets of opposing transverse positioning parts 10, achieves a centering and self-limiting transmission effect for the contacting workpiece. This ensures that the transmitted workpiece can be continuously transmitted while maintaining its center position, thus avoiding the phenomenon of deviation due to inaccurate transmission angle during the leveling process. This improves the uniformity of plate leveling and ensures the stability of the welding process.

[0036] Example 2: Based on Example 1, to address the technical problem that although some enterprises have implemented automation, key aspects such as dynamic pressure control and precise matching are still in the experimental stage, resulting in insufficient pass rates for thick-walled pipes and thus certain limitations in their use, a pressure regulating structure is also disclosed. The specific structure is as follows:

[0037] The inner side of the transverse movable part 5 is provided with a pressure adjustment structure, which can be used to control and adjust the pressure of different areas of the workpiece to be processed.

[0038] The pressure regulating structure is equipped with a pressure sensor assembly 13, which is nested inside the upper end of the transverse movable member 5. A contact nesting member 15 is nested inside the upper end of the transverse movable member 5, and a third spring 14 is fixedly connected to the outer side of the contact nesting member 15. The third spring 14 and the transverse movable member 5 are mutually connected. A distance sensor 18 is installed on the upper end of the contact nesting member 15. A drive push rod 16 is installed on the outer side of the upper end of the preset base 1, and a docking pre-reserved roller 17 is nested inside the upper end of the preset base 1. The upper end of the docking pre-reserved roller 17 is mutually connected to the output end of the drive push rod 16. The electrical signal drive receiving end of the drive push rod 16 is connected to the signal conversion and transmission end of the distance sensor 18 and the pressure sensor assembly 13. When the built-in guide 7 pushes the material in contact with it vertically along the inner side of the transverse movable member 5, the evenly distributed abutment nesting members 15 are stretched by the force, and the third spring 14 moves upward along the inner side of the transverse movable member 5. The abutment nesting members 15 are evenly distributed at equal intervals about the center point of the transverse movable member 5. The docking reserved roller 17 moves vertically along the upper end of the preset base 1, and the position of the docking reserved roller 17 corresponds to that of the transmission docking roller 2. During the process of the transverse movable member 5 and the built-in guide 7 driving the workpiece to be transported at a fixed distance, the workpiece moving upward will apply pressure to the multiple abutment nesting members 15 on the inner side of the transverse movable member 5 at the same time, so that it moves upward according to the flatness of the workpiece until it contacts the pressure sensor assembly 13. At this time, according to Depending on the protrusions and concavities of the workpiece surface, the corresponding contact nesting piece 15 will move to apply pressure to the pressure sensor assembly 13. Conversely, the contact nesting piece 15 at the concave part of the workpiece surface will have limited movement and will not contact the pressure sensor assembly 13, or will only have a weak contact force. This allows the pressure sensor assembly 13 to calculate the pressure signal generated by the highest protrusion of the workpiece and transmit the signal to the microcontroller signal drive receiver of the drive push rod 16. This drives the corresponding drive push rod 16 to increase the downward movement distance of the end of the drive push rod 16 relative to the workpiece thickness, thereby allowing it to apply greater pressure to the workpiece surface. This ensures that the leveling pressure generated by the equipment is effective regardless of the workpiece thickness. This ensures continuous pressure application to different positions of the transmitted workpiece, achieving dynamic control. During signal matching based on the different protrusions and concavities of the workpiece surface, if the concavity of the workpiece surface is too large, the corresponding contact nest 15 will sink in. This, combined with the contact state between the contact nest 15 on the protruding part of the workpiece and the pressure sensor assembly 13, and the contact nest 15 in the concave state, will cooperate with the signal detection and conversion of the upper distance sensor 18, transmitting the signal to the single-chip microcomputer signal drive receiver of the drive push rod 16. This activates the drive push rod 16, further increasing the downward movement distance of the end of the drive push rod 16 and the reserved roller 17 according to the thickness of the workpiece, allowing it to apply greater auxiliary force to the thinner parts of the workpiece.This ensures the evenness of the workpiece leveling and avoids the formation of voids due to unleveled concave areas.

[0039] 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.

[0040] 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 pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes, comprising a preset base (1), wherein a transmission docking roller (2) is rotatably connected to the upper end of the preset base (1), and the transmission docking roller (2) is connected to a drive motor inside the equipment via a synchronous belt, characterized in that: The outer side of the transmission docking roller (2) is docked with an external docking component (3), and the outer side of the external docking component (3) is rotatably connected with a guide docking rod (4). The front end of the preset base (1) is nested with a transverse movable component (5), and the outer side of the transverse movable component (5) is docked with the outer side of the guide docking rod (4). The inner end of the transverse movable component (5) is provided with a guide center positioning structure, which assists in the correction of the transmitted material. The guiding center positioning structure is provided with a contacting part (6), and the contacting part (6) is fixedly connected to the surface of the preset base (1). The inner side of the horizontal movable part (5) is provided with a vertical sliding groove (8), and the inner side of the vertical sliding groove (8) is nested with a built-in guide (7). The lower end of the built-in guide (7) is fixedly connected with a first spring (9), and the first spring (9) is connected to the inner side of the vertical sliding groove (8). The inner side of the built-in guide (7) is nested with a transverse positioning member (10), and the lower end of the transverse positioning member (10) is fixedly connected with a second spring (11), and the second spring (11) is connected to the inner side of the built-in guide (7). The lower outer side of the transverse positioning member (10) is connected to a connecting wire rope component (12), and the connecting wire rope component (12) passes through the inner side of the built-in guide (7). At the same time, the end of the connecting wire rope component (12) is connected to the lower end of the transverse movable member (5). The inner side of the transverse movable part (5) is provided with a pressure adjustment structure, which is used to control and adjust the pressure of different areas of the workpiece to be processed. The pressure regulating structure is provided with a pressure sensor assembly (13), and the pressure sensor assembly (13) is nested and installed on the upper inner side of the transverse movable part (5). The upper end of the transverse movable part (5) is nested and installed with an abutting nesting part (15), and a third spring (14) is fixedly connected to the outer side of the abutting nesting part (15), and the third spring (14) and the transverse movable part (5) are connected to each other. A distance sensor (18) is installed on the upper end of the abutting nest (15), a drive push rod (16) is installed on the outer side of the upper end of the preset base (1), and a docking reserved roller (17) is nested on the inner side of the upper end of the preset base (1). The upper end of the docking reserved roller (17) is docked with the output end of the drive push rod (16). The electrical signal drive receiving end of the drive push rod (16) is electrically connected to the signal conversion and transmission end of the distance sensor (18) and the pressure sensor assembly (13). The transmission docking roller (2) drives the external docking component (3) to rotate synchronously, and the external docking component (3) drives the transverse movable component (5) to form a transverse movable structure along the outside of the preset base (1) through the guide docking rod (4). When the transverse movable component (5) moves to contact the contact docking component (6), the built-in guide component (7) on its inner side is stretched by the force to stretch the first spring (9) and move vertically.

2. The pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes according to claim 1, characterized in that: During the vertical movement of the built-in guide (7) along the inner side of the transverse movable part (5), the docking wire rope component (12) with its end fixed position will be forced to move the transverse positioning part (10) inward along the interior of the built-in guide (7), and the transverse positioning part (10) has an arc-shaped structure when viewed from above.

3. A pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes according to claim 2, characterized in that: When the built-in guide (7) pushes the contacting material vertically along the inner side of the transverse movable member (5), the evenly distributed abutting nest (15) is stretched by the force and the third spring (14) moves upward along the inner side of the transverse movable member (5). The abutting nest (15) is evenly distributed with equal spacing about the center point of the transverse movable member (5).

4. A pressure self-compensating leveling machine for large-diameter thick-walled spiral welded pipes according to claim 3, characterized in that: The docking reserved roller (17) moves vertically along the upper end of the preset base (1), and the positions of the docking reserved roller (17) and the transmission docking roller (2) correspond to each other.

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