Pipe weld cleaning mechanism

Abstract

This application provides a weld seam cleaning mechanism for welded pipes, belonging to the field of steel pipe production equipment. The weld seam cleaning mechanism includes a pressure-applying structure, a grinding wheel, and a guide wheel. The pressure-applying structure has a movable end that applies pressure to the welded pipe; the grinding wheel is located at the movable end and is suitable for grinding the weld seam of the welded pipe; the guide wheel is located at the movable end, and its rotation plane is parallel to the axis of the welded pipe. When the movable end applies pressure to the welded pipe, the grinding wheel first abuts against the weld seam of the welded pipe. After the grinding wheel grinds the weld seam to the correct position, the guide wheel abuts against the welded pipe and restricts the further feed of the grinding wheel. The movable end of the pressure-applying structure presses the grinding wheel and guide wheel onto the welded pipe, allowing the grinding wheel to move with the bending and undulating motion of the welded pipe, maintaining constant pressure on the weld seam. This prevents insufficient grinding of the weld seam in concave parts of the welded pipe, while the guide wheel restricts the feed of the grinding wheel, preventing over-grinding of the weld seam in convex parts of the welded pipe, thereby ensuring the quality of the welded pipe.

Description

Technical Field

[0001] This application belongs to the technical field of steel pipe production equipment, and more specifically, relates to a weld seam cleaning mechanism for welded pipes. Background Technology

[0002] Steel pipes are generally divided into two types: seamless steel pipes and welded steel pipes. Welded steel pipes are made by rolling steel strips into a tubular shape and then welding the joints together using a welding machine; they are also known as welded pipes. After welding, the weld scars at the weld seam are usually scraped off with a scraper; and to further improve the smoothness of the weld seam, preliminary grinding is also performed.

[0003] Current grinding equipment typically uses fixed grinding wheels to clean the weld seam after scraping. However, because the welded pipe is slightly bent after welding, this grinding equipment may over- or under-grind the weld seam, affecting the quality of the steel pipe. Summary of the Invention

[0004] In view of this, the present application provides a weld seam cleaning mechanism for welded pipes to solve the technical problem in the prior art that steel pipe bending leads to excessive or insufficient grinding.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] On the one hand, a weld seam cleaning mechanism for welded pipes is provided, comprising:

[0007] The pressure-applying structure has a movable end that applies pressure to the welded pipe;

[0008] A grinding wheel, located at the movable end, is suitable for grinding the weld seam of the welded pipe;

[0009] A guide wheel is located at the movable end, and its rotation plane is parallel to the axis of the welded pipe;

[0010] When the movable end applies pressure to the welded pipe, the grinding wheel first abuts against the weld seam of the welded pipe. After the grinding wheel grinds the weld seam to the required position, the guide wheel abuts against the welded pipe and restricts the continued feed of the grinding wheel.

[0011] In some embodiments, the outer periphery of the rim of the grinding wheel is provided with a grinding groove, the cross-section of the grinding groove is arc-shaped and the curvature is not greater than the circumferential curvature of the welded pipe surface;

[0012] The rotating plane of the grinding wheel is parallel to the axial direction of the welded pipe, and the rim of the grinding wheel matches the surface of the welded pipe through the grinding groove.

[0013] In some embodiments, the pressure-applying structure includes:

[0014] The mounting bracket has a channel through which the welded pipe can pass;

[0015] The movable arm has one end hinged to the fixed frame and the other end forming the movable end;

[0016] An elastic element is disposed between the movable arm and the fixed frame, and its elastic force pushes the movable arm to swing in a predetermined direction.

[0017] In some embodiments, at least one of the guide wheels is located on the feed side of the grinding wheel along the axial direction of the welded pipe; the guide wheel has an avoidance groove on its outer circumference, and the guide wheel rolls along the weld seam of the welded pipe and avoids the weld seam through the avoidance groove.

[0018] In some embodiments, the number of guide wheels is at least two, and at least two guide wheels are located on the feed side and discharge side of the grinding wheel, respectively, along the axial direction of the welded pipe.

[0019] The two guide wheels are respectively connected to the movable end via connecting rods; the two connecting rods are respectively hinged to the movable end and set at an angle, and a telescopic adjustment rod is provided between the two connecting rods. The telescopic adjustment rod is used to adjust the opening angle of the two connecting rods to change the relative position of the guide wheel and the grinding wheel in the direction perpendicular to the axis of the welded pipe.

[0020] In some embodiments, the telescopic adjustment rod includes:

[0021] Two threaded rods are respectively hinged to the two connecting rods;

[0022] The adjusting sleeve has two ends that are threadedly connected to the threaded rod, and the threads at both ends are in opposite directions.

[0023] In some embodiments, the weld seam cleaning mechanism for welded pipes further includes:

[0024] Conveyor wheel set, suitable for conveying welded pipes axially;

[0025] A scraper is positioned behind the grinding wheel in the conveying direction of the conveyor wheel assembly, and the scraper is aligned with the weld seam of the welded pipe.

[0026] The beneficial effects of the welded pipe weld seam cleaning mechanism provided in this application embodiment are as follows: Compared with the prior art, the welded pipe weld seam cleaning mechanism of this application embodiment presses the grinding wheel and guide wheel onto the welded pipe through the movable end of the pressure structure, so that the grinding wheel can move with the bending and undulation of the welded pipe and always keep it pressed on the weld seam. This avoids insufficient grinding of the weld seam in the concave part of the welded pipe, while the guide wheel limits the feed amount of the grinding wheel and avoids over-grinding of the weld seam in the convex part of the welded pipe, thereby ensuring the quality of the welded pipe. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front view of the weld seam cleaning mechanism for welded pipes provided in an embodiment of this application. The arrow in the figure indicates the direction of welded pipe conveying.

[0029] Figure 2 for Figure 1 A top view of the weld seam cleaning mechanism for welded pipes, where some structures are not shown and the arrows indicate the direction of pipe conveying.

[0030] Figure 3 This is a schematic diagram showing the relationship between the grinding wheel and the welded pipe in the welded pipe cleaning mechanism provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram showing the relationship between the guide wheel and the welded pipe in the welded pipe cleaning mechanism provided in the embodiments of this application.

[0032] The following are the labeling elements in the figure:

[0033] 1-Pressure application structure; 11-Fixed frame; 12-Moving arm; 13-Elastic element; 2-Grinding wheel; 21-Grinding groove; 3-Guide wheel; 31-Allowing groove; 32-Connecting rod; 4-Telescopic adjustment rod; 41-Threaded rod; 42-Adjusting sleeve; 5-Scraper; 6-Conveying wheel assembly; 7-Welded pipe; 71-Weld seam. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0038] Please refer to the following: Figures 1 to 4 The weld seam cleaning mechanism for welded pipes provided in the embodiments of this application will now be described. A weld seam cleaning mechanism for welded pipes includes:

[0039] The pressure-applying structure has a movable end that applies pressure to the welded pipe;

[0040] The grinding wheel, located at the movable end, is suitable for grinding the weld seam of the welded pipe;

[0041] The guide wheel is located at the movable end, and its plane of rotation is parallel to the axis of the welded pipe.

[0042] When the moving end applies pressure to the welded pipe, the grinding wheel first abuts against the weld seam of the welded pipe. After the grinding wheel grinds the weld seam to the correct position, the guide wheel abuts against the welded pipe and restricts the continued feed of the grinding wheel.

[0043] Compared with the prior art, the weld seam cleaning mechanism of this application uses the movable end of the pressure structure to press the grinding wheel and guide wheel onto the weld pipe, so that the grinding wheel can move with the bending and undulation of the weld pipe and always keep it pressed against the weld seam. This avoids insufficient grinding of the weld seam in the concave part of the weld pipe, while the guide wheel limits the feed of the grinding wheel and avoids over-grinding of the weld seam in the convex part of the weld pipe, thereby ensuring the quality of the weld pipe.

[0044] In this embodiment, the pressure-applying structure is used to press the grinding wheel and guide wheel onto the surface of the welded pipe, so that no matter how the welded pipe is bent or undulating, the grinding wheel can always remain in contact with the surface of the welded pipe, thereby grinding the weld.

[0045] The structure of the grinding wheel can be the same as that of traditional grinding equipment, using a grinding wheel driven by an electric motor, etc.

[0046] The guide wheel is mainly used to limit the maximum feed of the grinding wheel. When the pressure structure presses the grinding wheel and the guide wheel onto the surface of the welded pipe, the grinding wheel abuts against the surface of the welded pipe before the guide wheel. After the grinding wheel has finished grinding the weld seam on the surface of the welded pipe, the guide wheel abuts against the surface of the welded pipe, thus supporting the welded pipe between the movable end of the pressure structure and the welded pipe, limiting the maximum feed of the grinding wheel and preventing the grinding wheel from over-grinding the weld seam.

[0047] Please see Figure 3 As a specific embodiment of the weld seam cleaning mechanism for welded pipes provided in this application, the outer circumference of the grinding wheel is provided with a grinding groove, the cross section of the grinding groove is arc-shaped and the curvature is not greater than the circumferential curvature of the welded pipe surface;

[0048] The rotating plane of the grinding wheel is parallel to the axial direction of the welded pipe, and the rim of the grinding wheel matches the surface of the welded pipe through the grinding groove.

[0049] In this embodiment, the rotation plane of the grinding wheel is parallel to the axis of the welded pipe, and the grinding groove on the outer periphery of the grinding wheel contacts the weld seam on the surface of the welded pipe, so that the grinding wheel can grind the raised weld seam on the surface of the welded pipe to a near-arc-shaped surface, achieving a better grinding effect.

[0050] In practice, the welded pipe is conveyed axially by the conveying equipment and passes through the grinding groove on the outer periphery of the grinding wheel, where the raised weld seam is ground down by the grinding wheel.

[0051] Please see Figure 1 and 2 As a specific embodiment of the weld seam cleaning mechanism for welded pipes provided in this application, the pressure application structure includes:

[0052] The mounting bracket has a channel through which the welded pipe can pass;

[0053] The movable arm is hinged to the fixed frame at one end and forms a movable end at the other end;

[0054] An elastic element is located between the movable arm and the fixed frame, and its elastic force pushes the movable arm to swing in a predetermined direction.

[0055] In practical implementation, the fixed frame can be a gantry frame (inverted U-shape with a passage in the middle), through which the welded pipe passes. The movable arm is hinged to the top crossbeam of the fixed frame and can swing up and down. The elastic element can be a tension spring, with one end fixed to the movable arm and the other end fixed to the fixed frame. The elastic force pulls the movable arm downward, causing the movable end of the movable arm to press against the welded pipe below.

[0056] Please see Figure 1 and 2As a specific embodiment of the weld seam cleaning mechanism for welded pipe provided in this application, at least one guide wheel is located on the feed side of the grinding wheel in the axial direction of the welded pipe; the outer circumference of the guide wheel is provided with an avoidance groove, the guide wheel rolls along the weld seam of the welded pipe and avoids the weld seam through the avoidance groove.

[0057] In this embodiment, the guide wheel avoids the weld seam of the welded pipe by avoiding the groove, which can prevent the guide wheel from pressing on the uneven weld seam, so that the guide wheel limits the grinding depth of the grinding wheel based on the surface of the welded pipe.

[0058] In practice, the guide wheel's clearance groove is at least 8mm deep and at least 11mm wide, making it suitable for the production of welded pipes of standard sizes.

[0059] Please see Figure 1 and 2 As a specific embodiment of the weld seam cleaning mechanism for welded pipes provided in this application, the number of guide wheels is at least two, and at least two guide wheels are located on the feed side and discharge side of the grinding wheel respectively along the axial direction of the welded pipe.

[0060] Two guide wheels are connected to the movable end via connecting rods; the two connecting rods are hinged to the movable end and set at an angle; a telescopic adjustment rod is provided between the two connecting rods, which is used to adjust the opening angle of the two connecting rods to change the relative position of the guide wheel and the grinding wheel in the direction perpendicular to the welded pipe axis.

[0061] In this embodiment, two guide wheels are respectively positioned on the feed and discharge sides of the grinding wheel, enabling the grinding wheel to move more effectively with the bending and undulation of the welded pipe. The angle between the two connecting rods is changed by extending and retracting the telescopic adjustment rod, thereby altering the relative position of the guide wheel and the grinding wheel in the direction perpendicular to the welded pipe axis. This changes the maximum feed rate of the grinding wheel when the guide wheel contacts the welded pipe, and can be adjusted according to the wear of the grinding wheel, grinding requirements, and other actual conditions. Specifically, the position of the grinding wheel is fixed; when the telescopic adjustment rod extends, the angle between the two connecting rods increases, and the guide wheel moves away from the welded pipe in the direction perpendicular to the welded pipe axis; conversely, when the telescopic adjustment rod shortens, the guide wheel moves closer to the welded pipe. Through this method, the relative position of the grinding wheel and the guide wheel is changed.

[0062] In practical implementation, the grinding wheel is rotatably mounted on the movable end of the movable arm, and the motor used for driving it can also be mounted on the movable arm, thereby increasing the downward pressure. The ends of the two connecting rods are hinged to the rotating shaft of the grinding wheel, and the two connecting rods are of the same length. Guide wheels are installed at the ends of the two connecting rods, and both guide wheels can be provided with clearance grooves.

[0063] Please see Figure 1 As a specific embodiment of the weld seam cleaning mechanism for welded pipes provided in this application, the telescopic adjustment rod includes:

[0064] Two threaded rods are hinged to two connecting rods respectively;

[0065] The adjusting sleeve has two ends that are threadedly connected to the threaded rod, and the threads at both ends are in opposite directions.

[0066] In practice, the ends of the two threaded rods are hinged to the two connecting rods, and the threads of the two rods are opposite. The internal threads at both ends of the adjusting sleeve turn in opposite directions and are threadedly connected to the two threaded rods respectively. In use, the adjusting sleeve can be rotated in the forward direction to extend the two threaded rods to both ends, thereby pushing the two connecting rods open; while rotating the adjusting sleeve in the reverse direction will cause the two threaded rods to retract inward, thereby driving the two connecting rods to close.

[0067] Please see Figure 1 and 2 As a specific embodiment of the welded pipe weld cleaning mechanism provided in this application, the welded pipe weld cleaning mechanism further includes:

[0068] Conveyor wheel set, suitable for conveying welded pipes axially;

[0069] In the conveying direction of the conveyor wheel assembly, the scraper is located behind the grinding wheel and is aligned with the weld seam of the welded pipe.

[0070] In this embodiment, the conveyor wheel set conveys the welded pipe along the axial direction, passing it sequentially through the scraper and the grinding wheel. The scraper first scrapes off the protrusions on the surface of the weld, and then the grinding wheel further grinds the weld to make it smooth.

[0071] In practical implementation, the conveyor wheel assembly transports the welded pipe horizontally. The scraper and grinding wheel can be mounted above the welded pipe via a fixed frame of a pressure-applying structure. The conveyor wheel assembly can employ any existing structure capable of axially transporting the welded pipe, as long as it can smoothly push the welded pipe past the scraper and grinding wheel. For example, the conveyor wheel assembly can use paired conveyor wheels, clamped on both sides of the welded pipe. Rotation of these wheels drives the welded pipe axially without affecting the treatment of the weld seam at the top of the pipe.

[0072] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pipe weld cleaning mechanism, characterized by, include: The pressure-applying structure has a movable end that applies pressure to the welded pipe; A grinding wheel, located at the movable end, is suitable for grinding the weld seam of the welded pipe; A guide wheel is located at the movable end, and its rotation plane is parallel to the axis of the welded pipe; When the movable end applies pressure to the welded pipe, the grinding wheel first abuts against the weld seam of the welded pipe. After the grinding wheel grinds the weld seam to the required position, the guide wheel abuts against the welded pipe and restricts the continued feed of the grinding wheel.

2. The pipe weld cleaning mechanism of claim 1, wherein, The grinding wheel has a grinding groove on its outer circumference. The cross-section of the grinding groove is arc-shaped and the curvature is not greater than the circumferential curvature of the welded pipe surface. The rotating plane of the grinding wheel is parallel to the axial direction of the welded pipe, and the rim of the grinding wheel matches the surface of the welded pipe through the grinding groove.

3. The pipe weld cleaning mechanism of claim 1, wherein, The pressure-applying structure includes: The mounting bracket has a channel through which the welded pipe can pass; The movable arm has one end hinged to the fixed frame and the other end forming the movable end; An elastic element is disposed between the movable arm and the fixed frame, and its elastic force pushes the movable arm to swing in a predetermined direction.

4. The weld seam cleaning mechanism for welded pipes as described in claim 1, characterized in that, Along the axial direction of the welded pipe, at least one of the guide wheels is located on the feed side of the grinding wheel; the outer circumference of the guide wheel is provided with an avoidance groove, and the guide wheel rolls along the weld seam of the welded pipe and avoids the weld seam through the avoidance groove.

5. The weld seam cleaning mechanism for welded pipes as described in claim 4, characterized in that, The number of guide wheels is at least two, and at least two guide wheels are located on the feed side and discharge side of the grinding wheel respectively along the axial direction of the welded pipe. The two guide wheels are respectively connected to the movable end via connecting rods; the two connecting rods are respectively hinged to the movable end and set at an angle, and a telescopic adjustment rod is provided between the two connecting rods. The telescopic adjustment rod is used to adjust the opening angle of the two connecting rods to change the relative position of the guide wheel and the grinding wheel in the direction perpendicular to the axis of the welded pipe.

6. The weld seam cleaning mechanism for welded pipes as described in claim 5, characterized in that, The telescopic adjusting rod includes: Two threaded rods are respectively hinged to the two connecting rods; The adjusting sleeve has two ends that are threadedly connected to the threaded rod, and the threads at both ends are in opposite directions.

7. The weld seam cleaning mechanism for welded pipes as described in claim 1, characterized in that, The weld seam cleaning mechanism for welded pipes also includes: Conveyor wheel set, suitable for conveying welded pipes axially; A scraper is positioned behind the grinding wheel in the conveying direction of the conveyor wheel assembly, and the scraper is aligned with the weld seam of the welded pipe.

Images